CN107014016B - Fluorine pump natural cooling evaporation type condensation water chiller and control method thereof - Google Patents
Fluorine pump natural cooling evaporation type condensation water chiller and control method thereofDownload PDFInfo
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- CN107014016B CN107014016BCN201710323820.8ACN201710323820ACN107014016BCN 107014016 BCN107014016 BCN 107014016BCN 201710323820 ACN201710323820 ACN 201710323820ACN 107014016 BCN107014016 BCN 107014016B
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- 238000001816coolingMethods0.000titleclaimsabstractdescription155
- YCKRFDGAMUMZLT-UHFFFAOYSA-NFluorine atomChemical compound[F]YCKRFDGAMUMZLT-UHFFFAOYSA-N0.000titleclaimsabstractdescription94
- 229910052731fluorineInorganic materials0.000titleclaimsabstractdescription94
- 239000011737fluorineSubstances0.000titleclaimsabstractdescription94
- XLYOFNOQVPJJNP-UHFFFAOYSA-NwaterSubstancesOXLYOFNOQVPJJNP-UHFFFAOYSA-N0.000titleclaimsabstractdescription49
- 238000009833condensationMethods0.000titleclaimsabstractdescription26
- 230000005494condensationEffects0.000titleclaimsabstractdescription26
- 230000008020evaporationEffects0.000titleclaimsabstractdescription16
- 238000001704evaporationMethods0.000titleclaimsabstractdescription16
- 238000000034methodMethods0.000titleclaimsdescription13
- 239000003507refrigerantSubstances0.000claimsabstractdescription40
- 238000005057refrigerationMethods0.000claimsabstractdescription34
- 239000007788liquidSubstances0.000claimsdescription151
- 239000000110cooling liquidSubstances0.000claimsdescription27
- 230000000694effectsEffects0.000abstractdescription5
- 238000004891communicationMethods0.000description6
- 238000004378air conditioningMethods0.000description5
- 238000005265energy consumptionMethods0.000description5
- 238000007710freezingMethods0.000description5
- 238000010586diagramMethods0.000description2
- 230000008014freezingEffects0.000description2
- 230000009467reductionEffects0.000description2
- 230000009286beneficial effectEffects0.000description1
- 230000008859changeEffects0.000description1
- 239000000498cooling waterSubstances0.000description1
- 230000007547defectEffects0.000description1
- 230000003111delayed effectEffects0.000description1
- 238000004146energy storageMethods0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 230000008569processEffects0.000description1
- 230000003014reinforcing effectEffects0.000description1
- 230000001932seasonal effectEffects0.000description1
- 230000007704transitionEffects0.000description1
- 238000010977unit operationMethods0.000description1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/195—Pressures of the condenser
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
Description
Technical Field
The application relates to the technical field of refrigeration, in particular to a fluorine pump natural cooling evaporation type condensation water chiller and a control method thereof.
Background
At present, an air-cooled water chiller is generally adopted as a cold source to provide chilled water for the indoor tail end of air conditioning equipment in a communication machine room, particularly a large-scale data center, so that the indoor environment of the communication machine room is cooled. Because the communication equipment in the communication machine room basically operates uninterruptedly all the year round and has very large heat productivity, the air-cooled water chiller used for the communication machine room generally needs annual refrigeration operation, has large operation energy consumption and low seasonal energy efficiency ratio.
Moreover, the air-cooled water chiller still needs to start the compressor to work in cold winter, when the outdoor environment is too low, the problem of insufficient liquid supply caused by too low condensing pressure is easy to occur to the compressor, and the heat load of the communication machine room at the moment is small, so that the compressor is frequently started and stopped, and the condition not only causes high energy consumption, but also reduces the service life of the compressor. Therefore, the reliability of the air-cooled water chiller has been difficult to solve.
Even if a condensation pressure control system is configured and the condenser is designed to be controlled in multiple stages, when the air-cooled water chiller runs at the outdoor and ambient temperatures below zero for a long time, the hidden danger is still high, and the system cost and the control difficulty are increased.
Application number CN201210205485.9 discloses a closed cooling tower refrigerating system applied to an IDC machine room and a refrigerating method thereof. The system comprises a closed cooling tower, a water-cooling refrigerating unit, a cold water tank, a freezing water pump, a cooling water pump, an IDC machine room end device, an embedded control system, a water-cooling refrigerating unit return water temperature sensor, a closed cooling tower return water temperature sensor and a closed cooling tower air inlet dry-wet ball temperature sensor. The refrigeration method of the patent application is operated under the dry working condition of the closed cooling tower in winter, so that the water-cooled refrigeration unit is prevented from being started, energy is saved, and freezing is prevented; the closed cooling tower runs under the wet working condition in transition seasons, so that the water-cooling refrigerating unit is prevented from being started, and energy is saved; the closed cooling tower operates under a wet working condition at night in summer, so that the water-cooled refrigerating unit is prevented from being started, and energy is saved; starting a water-cooling refrigerating unit in the daytime in summer; the running time of the water-cooling refrigerating unit is delayed by utilizing the energy storage of the cold water tank; and in the water outage period, the normal operation of the IDC machine room air conditioning system is ensured by utilizing the water storage function of the cold water tank. Such a control method is suitable for areas with mild climate and no water shortage. However, in northern areas, because the lowest temperature is-20 to-30 ℃ at night in winter, and even lower temperature occurs in extreme weather, a water cooling mode is adopted, the cooling tower needs to consider anti-freezing measures, the anti-freezing effect is general and not ideal, so that high-concentration anti-freezing solution needs to be added into circulating water of the cooling tower and pipelines, the investment is increased, and the pipelines and equipment are corroded.
Disclosure of Invention
In view of this, the invention aims to overcome the defects of the prior art and provide a fluorine pump natural cooling evaporation type condensation water chiller which can adapt to different seasons and has multiple control modes, so that the energy consumption of the operation of the water chiller is reduced. In addition, the application also provides a control method of the natural cooling evaporation type condensation water chiller based on the fluorine pump.
In order to solve the technical problem, the invention adopts the following scheme:
a fluorine pump natural cooling evaporation type condensation water chiller comprises a mechanical refrigeration system consisting of a compressor, a condenser (preferably an evaporation type condenser), a restrictor and an evaporator, and further comprises a secondary circulation system which exchanges heat with the evaporator, wherein the secondary circulation system is provided with a natural cooling system which can control the flow direction of a refrigerant in the secondary circulation system to exchange heat with the refrigerant (the refrigerant is also called snow and a refrigerant and is used for transferring heat energy and generating a refrigeration effect, and the refrigerant in the secondary circulation system can be water); the mechanical refrigeration system also comprises a fluorine pump arranged in the pipeline, the fluorine pump is connected with a fluorine pump bypass electromagnetic valve in parallel, the throttler is connected with a throttler bypass electromagnetic valve in parallel, and the compressor is connected with a compressor bypass electromagnetic valve in parallel; the mechanical refrigeration system, the secondary circulation system and the natural cooling system are electrically connected with a controller, and the controller controls the operation of each system (the controller controls the operation of each system of the water chiller, namely the operation of each component in each system).
The controller can control whether the refrigerant in the secondary circulation system flows to the natural cooling system, the natural cooling system obtains the cold energy of the surrounding environment to exchange heat with the refrigerant in the secondary circulation system, the mechanical refrigeration system can be closed in some seasons (such as winter), and the natural cooling system is independently utilized to obtain the cold energy. When the independent refrigeration of the natural cooling system can not meet the requirements of the machine room, the combination of the mechanical refrigeration system and the natural cooling system can be utilized to form mixed refrigeration. Especially, under the condition that the compressor cannot be completely stopped, the refrigerating capacity caused by the operation of the fluorine pump can make up for the refrigerating capacity loss caused by the power reduction of the compressor. Because the power of the compressor is greatly higher than that of the fluorine pump, the energy consumption of the mechanical refrigeration system is greatly reduced by combining the compressor and the fluorine pump. Mechanical refrigeration system and natural cooling system move alone respectively, do not influence each other, both can utilize natural cooling system alone to obtain cold volume, also can move mechanical refrigeration system alone and refrigerate, can also synthesize both and mix the refrigeration, and the holistic refrigeration efficiency of reinforcing adapts to different season demands.
The secondary circulation system comprises a secondary circulation liquid inlet pipeline and a secondary circulation liquid outlet pipeline, one end of the secondary circulation liquid inlet pipeline and one end of the secondary circulation liquid outlet pipeline are respectively connected with the evaporator, a power pump is arranged on the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline, and the natural cooling system is connected with the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline. The secondary circulation system provides chilled water for the indoor tail end of the air conditioning equipment. The refrigerant enters the evaporator from the secondary circulation liquid inlet pipeline, then flows out of the evaporator, and is conveyed to the indoor tail end of the air conditioning equipment through the secondary circulation liquid outlet pipeline (namely, the other end of the secondary circulation liquid inlet pipeline and the other end of the secondary circulation liquid outlet pipeline are connected with the air conditioning tail end equipment, so that circulation is formed).
The natural cooling system comprises a natural cooling coil pipe, a natural cooling liquid inlet pipeline and a natural cooling liquid outlet pipeline, one end of the natural cooling liquid inlet pipeline and one end of the natural cooling liquid outlet pipeline are respectively connected with two ends of the natural cooling coil pipe, the other end of the natural cooling liquid inlet pipeline and the other end of the natural cooling liquid outlet pipeline are connected to the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline, and a three-way valve is arranged at the joint of the natural cooling liquid inlet pipeline or the natural cooling liquid outlet pipeline and the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline. (the term is interpreted to mean that a three-way valve is arranged at the joint of the natural cooling liquid inlet pipeline and the secondary circulation liquid inlet pipeline, or a three-way valve is arranged at the joint of the natural cooling liquid inlet pipeline and the secondary circulation liquid outlet pipeline, or a three-way valve is arranged at the joint of the natural cooling liquid outlet pipeline and the secondary circulation liquid inlet pipeline, or a three-way valve is arranged at the joint of the natural cooling liquid outlet pipeline and the secondary circulation liquid outlet pipeline). The natural cooling system is adjusted through the three-way valve to change the flow direction of the refrigerant in the secondary circulation system, and when the three-way valve opens the branch connected with the natural cooling system, all the refrigerants flow into the natural cooling coil pipe, and the natural cooling coil pipe performs efficient heat exchange on the refrigerants. The three-way valve is a three-way valve or a switch three-way valve which can be adjusted in proportion, preferably, the proportion adjusting three-way valve is selected, and the three-way valve is electrically connected with the controller.
And a condensing fan is arranged on the condenser, and a cooling fan is arranged on the natural cooling coil.
And a condensing fan is arranged on the condenser, and a cooling fan is arranged on the natural cooling coil. The condensing fan and the cooling fan are speed-regulating fans or constant-speed fans. The setting of condensation fan and cooling blower has further improved the radiating effect, gives mechanical refrigeration system, natural cooling system's refrigeration combination and provides more control mode, adapts to the demand of different temperatures. The condensing fan and the cooling fan are electrically connected with the controller.
A liquid inlet temperature sensor is arranged on a secondary circulation liquid inlet pipeline of the secondary circulation system, and a liquid outlet temperature sensor is arranged on a secondary circulation liquid outlet pipeline of the secondary circulation system; the water chiller also includes an outdoor ambient temperature sensor for detecting an outdoor ambient temperature. The inlet temperature sensor is used for detecting the temperature of the refrigerant entering the evaporator, and the outlet temperature sensor is used for detecting the temperature of the refrigerant coming out of the evaporator. The sensors are electrically connected with the controller, the temperature of the refrigerant is directly detected by the liquid inlet temperature sensor and the liquid outlet temperature sensor, and the temperature is compared with the temperature detected by the outdoor environment temperature sensor, so that the purpose of accurate control is achieved.
And a condensation pressure sensor is arranged on a pipeline of the mechanical refrigeration system. The condensation pressure sensor is electrically connected with the controller. When the mechanical refrigeration system operates, if the condensation pressure is too high, the damage of refrigeration equipment and the increase of power consumption can be caused; if the condensing pressure is too low, the liquefying process of the refrigerant and the work of the expansion valve are influenced, so that the mechanical refrigerating system cannot work normally, and the refrigerating capacity is greatly reduced. The controller can control the operation of each system according to the numerical value of the condensation pressure sensor, and the condensation pressure is maintained within a normal range.
A control method of a fluorine pump natural cooling evaporation type condensation water chiller comprises the following control logics:
1) When the temperature detected by the outdoor temperature sensor is higher than that detected by the liquid inlet temperature sensor, the bypass connected with the natural cooling coil is closed by the three-way valve, all refrigerants of the secondary circulation system directly enter the evaporator without flowing through the natural cooling coil, and the loading and unloading control is performed by the compressor according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor; the loading and unloading control of the compressor specifically comprises the following steps: and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the compressor is controlled to be in loading operation, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the compressor is controlled to be in unloading operation.
2) When the temperature detected by the outdoor temperature sensor is lower than the temperature detected by the liquid inlet temperature sensor and higher than the temperature for starting the fluorine pump and the temperature for completely stopping the compressor, the bypass connected with the natural cooling coil is opened by the three-way valve, all refrigerants of the secondary circulation system flow through the natural cooling coil firstly and then enter the evaporator, the cooling fan runs in full load, the fluorine pump stops running, the fluorine pump bypass electromagnetic valve is opened, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor; the loading and unloading control of the compressor specifically comprises the following steps: when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the compressor is controlled to operate in a loading mode, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the compressor is controlled to operate in an unloading mode.
3) When the temperature detected by the outdoor temperature sensor is lower than the starting temperature of the fluorine pump but higher than the temperature at which the compressor can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator, the cooling fan runs in full load, the fluorine pump runs in full load, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor performs loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor; the loading and unloading control of the compressor specifically comprises the following steps: and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the compressor is controlled to be in loading operation, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the compressor is controlled to be in unloading operation.
4) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the compressor can completely stop running but higher than the temperature at which the fluorine pump can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the cooling fan runs in full load, the compressor and the condenser stop running, the condensing fan runs in full load, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are opened, the fluorine pump bypass electromagnetic valve is closed, and the fluorine pump carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor; the loading and unloading control of the fluorine pump is specifically as follows: when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the fluorine pump is controlled to operate in a loading mode, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the fluorine pump is controlled to operate in an unloading mode.
5) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the fluorine pump can completely stop running but higher than the temperature at which the cooling fan can run according to the minimum air quantity or completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the fluorine pump, the compressor and the condenser stop running, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the cooling fan performs loading and unloading control according to the temperature detected by the chilled water inlet liquid temperature sensor or the chilled water outlet liquid temperature sensor; the loading and unloading control of the cooling fan is specifically as follows: when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the cooling fan is controlled to operate in a loading mode (the loading is that the rotating speed is increased); and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than a set value, controlling the cooling fan to unload and run.
6) When the temperature detected by the outdoor temperature sensor is lower than the temperature of the cooling fan which can operate according to the minimum air volume or completely stop operating, the cooling fan operates according to the minimum air volume or completely stops operating, the fluorine pump, the compressor and the condenser stop operating, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the three-way valve performs adjustment control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor; the regulation control of the three-way valve is specifically as follows: when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the three-way valve is controlled to open a bypass connected with the natural cooling coil; when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than a set value, the three-way valve is controlled to close the bypass connected with the natural cooling coil.
Compared with the prior art, the invention has the following beneficial effects: this application adopts evaporative condenser as condensation radiator, adopts the natural cooling coil pipe as the natural cooling heat exchanger, adopts the fluorine pump as refrigerant side natural cooling power device, and evaporative condenser and natural cooling coil pipe use one set of independent fan respectively. This application adopts high-efficient evaporation formula condensation technique, is showing the energy efficiency ratio that improves the unit, can be when outdoor ambient temperature is lower, through the cold volume that natural cooling system obtained low temperature environment, also can replace the compressor operation to obtain the cold volume of low-temperature air through the operation of fluorine pump, furthest's reduction even stop the compressor completely to reduce unit operation energy consumption, energy-conserving effect is showing. The problems of insufficient liquid supply, frequent starting and stopping of the compressor and the like caused by too low high pressure and easiness in occurrence of refrigeration of the compressor when the outdoor environment is too low can be avoided, and the operation reliability is high.
Drawings
FIG. 1 is a schematic diagram of the results of an embodiment (the dashed connections of the controller to the various components represent electrical connections);
FIG. 2 is a schematic structural diagram of the embodiment.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will further describe the present invention with reference to the accompanying drawings.
Examples
As shown in fig. 1 and 2, a fluorine pump natural cooling evaporation type condensation water chiller comprises amechanical refrigeration system 100 composed of acompressor 110, anevaporation type condenser 120, arestrictor 130 and anevaporator 140, wherein theevaporation type condenser 120 is provided with acondensation fan 121, the chiller further comprises asecondary circulation system 200 for exchanging heat with theevaporator 140, and thesecondary circulation system 200 is provided with anatural cooling system 300 for controlling the flow direction of water in thesecondary circulation system 200 to exchange heat with water; themechanical refrigeration system 100 further comprises afluorine pump 150 arranged in the pipeline, thefluorine pump 150 is connected in parallel with a fluorine pump bypasselectromagnetic valve 151, therestrictor 130 is connected in parallel with a restrictor bypasselectromagnetic valve 131, and thecompressor 110 is connected in parallel with a compressor bypasselectromagnetic valve 111; themechanical refrigeration system 100, thesecondary circulation system 200, and thenatural cooling system 300 are electrically connected to acontroller 400, and thecontroller 400 controls the operation of each system.
Thesecondary circulation system 200 comprises a secondary circulationliquid inlet pipeline 210 and a secondary circulationliquid outlet pipeline 220, one end of the secondary circulationliquid inlet pipeline 210 and one end of the secondary circulationliquid outlet pipeline 220 are respectively connected with theevaporator 140, and a power pump is arranged on the secondary circulationliquid outlet pipeline 220; thenatural cooling system 300 includes anatural cooling coil 340, a natural coolingliquid inlet pipeline 310 and a natural coolingliquid outlet pipeline 320, thenatural cooling coil 340 is provided with acooling fan 341, one end of the natural coolingliquid inlet pipeline 310 and one end of the natural coolingliquid outlet pipeline 320 are respectively connected with two ends of thenatural cooling coil 340, the other end of the natural coolingliquid inlet pipeline 310 and the other end of the natural coolingliquid outlet pipeline 320 are connected to the secondary circulationliquid inlet pipeline 210, and a three-way valve 330 is arranged at the joint of the natural coolingliquid outlet pipeline 320 and the secondary circulationliquid inlet pipeline 210.
A secondary circulationliquid inlet pipeline 210 of the secondary circulation system is provided with a liquidinlet temperature sensor 230, and a secondary circulationliquid outlet pipeline 220 of the secondary circulation system is provided with a liquidoutlet temperature sensor 240; the water chiller further includes an outdoorambient temperature sensor 500 for detecting an outdoor ambient temperature. Acondensing pressure sensor 160 is disposed on a pipeline of themechanical refrigeration system 100.
The control method of the fluorine pump natural cooling evaporation type condensation water chiller comprises the following control logics:
1) When the temperature detected by the outdoor temperature sensor is higher than that detected by the liquid inlet temperature sensor, the bypass connected with the natural cooling coil is closed by the three-way valve, all refrigerants of the secondary circulation system directly enter the evaporator without flowing through the natural cooling coil, and the loading and unloading control is performed by the compressor according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
2) When the temperature detected by the outdoor temperature sensor is lower than the temperature detected by the liquid inlet temperature sensor and higher than the temperature for starting the fluorine pump and the temperature for completely stopping the compressor, the bypass connected with the natural cooling coil is opened by the three-way valve, all refrigerants of the secondary circulation system flow through the natural cooling coil firstly and then enter the evaporator, the cooling fan runs in full load, the fluorine pump stops running, the fluorine pump bypass electromagnetic valve is opened, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
3) When the temperature detected by the outdoor temperature sensor is lower than the starting temperature of the fluorine pump but higher than the temperature at which the compressor can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator, the cooling fan runs in full load, the fluorine pump runs in full load, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor performs loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
4) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the compressor can completely stop running but higher than the temperature at which the fluorine pump can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the cooling fan runs in full load, the compressor and the condenser stop running, the condensing fan runs in full load, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are opened, the fluorine pump bypass electromagnetic valve is closed, and the fluorine pump carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
5) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the fluorine pump can completely stop running but higher than the temperature at which the cooling fan can run according to the minimum air quantity or completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the fluorine pump, the compressor and the condenser stop running, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the cooling fan performs loading and unloading control according to the temperature detected by the chilled water inlet liquid temperature sensor or the chilled water outlet liquid temperature sensor;
6) When the temperature detected by the outdoor temperature sensor is lower than the temperature which can be set by the cooling fan according to the minimum air quantity or completely stop running, the cooling fan runs according to the minimum air quantity or completely stops running, the fluorine pump, the compressor and the condenser stop running, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the three-way valve is adjusted and controlled according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor.
The above embodiments are only specific implementations of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.
Claims (4)
1. A fluorine pump natural cooling evaporation type condensation water chiller comprises a mechanical refrigeration system consisting of a compressor, a condenser, a restrictor and an evaporator, and is characterized by further comprising a secondary circulation system which exchanges heat with the evaporator, wherein the secondary circulation system is provided with a natural cooling system which can control the flow direction of a refrigerant in the secondary circulation system to exchange heat with the refrigerant; the mechanical refrigeration system also comprises a fluorine pump arranged in the pipeline, the fluorine pump is connected with a fluorine pump bypass electromagnetic valve in parallel, the throttler is connected with a throttler bypass electromagnetic valve in parallel, and the compressor is connected with a compressor bypass electromagnetic valve in parallel; the mechanical refrigeration system, the secondary circulation system and the natural cooling system are electrically connected with a controller, and the controller controls the operation of each system;
the secondary circulation system comprises a secondary circulation liquid inlet pipeline and a secondary circulation liquid outlet pipeline, one end of the secondary circulation liquid inlet pipeline and one end of the secondary circulation liquid outlet pipeline are respectively connected with the evaporator, a power pump is arranged on the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline, and the natural cooling system is connected with the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline;
the natural cooling system comprises a natural cooling coil pipe, a natural cooling liquid inlet pipeline and a natural cooling liquid outlet pipeline, one end of the natural cooling liquid inlet pipeline and one end of the natural cooling liquid outlet pipeline are respectively connected with two ends of the natural cooling coil pipe, the other end of the natural cooling liquid inlet pipeline and the other end of the natural cooling liquid outlet pipeline are connected to the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline, and a three-way valve is arranged at the joint of the natural cooling liquid inlet pipeline or the natural cooling liquid outlet pipeline and the secondary circulation liquid inlet pipeline or the secondary circulation liquid outlet pipeline;
a condensing fan is arranged on the condenser, and a cooling fan is arranged on the natural cooling coil;
a liquid inlet temperature sensor is arranged on a secondary circulation liquid inlet pipeline of the secondary circulation system, and a liquid outlet temperature sensor is arranged on a secondary circulation liquid outlet pipeline of the secondary circulation system; the water chiller further comprises an outdoor environment temperature sensor for detecting the outdoor environment temperature;
the fluorine pump natural cooling evaporation type condensation water chiller is used for realizing the following control logics:
1) When the temperature detected by the outdoor temperature sensor is higher than the temperature detected by the liquid inlet temperature sensor, the three-way valve closes a bypass connected with the natural cooling coil, all refrigerants of the secondary circulation system directly enter the evaporator without flowing through the natural cooling coil, and the compressor carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
2) When the temperature detected by the outdoor temperature sensor is lower than the temperature detected by the liquid inlet temperature sensor and higher than the temperature for starting the fluorine pump and the temperature for completely stopping the compressor, the bypass connected with the natural cooling coil is opened by the three-way valve, all refrigerants of the secondary circulation system flow through the natural cooling coil firstly and then enter the evaporator, the cooling fan runs in full load, the fluorine pump stops running, the fluorine pump bypass electromagnetic valve is opened, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
3) When the temperature detected by the outdoor temperature sensor is lower than the starting temperature of the fluorine pump but higher than the temperature at which the compressor can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator, the cooling fan runs in full load, the fluorine pump runs in full load, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor performs loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
4) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the compressor can completely stop running but higher than the temperature at which the fluorine pump can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the cooling fan runs in full load, the compressor and the condenser stop running, the condensing fan runs in full load, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are opened, the fluorine pump bypass electromagnetic valve is closed, and the fluorine pump carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
5) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the fluorine pump can completely stop running but higher than the temperature at which the cooling fan can run according to the minimum air quantity or completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the fluorine pump, the compressor and the condenser stop running, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the cooling fan performs loading and unloading control according to the temperature detected by the chilled water inlet liquid temperature sensor or the chilled water outlet liquid temperature sensor;
6) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the cooling fan can operate according to the minimum air volume or completely stop operating, the cooling fan operates according to the minimum air volume or completely stops operating, the fluorine pump, the compressor and the condenser stop operating, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the three-way valve performs adjustment control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor.
2. The fluorine pump natural cooling evaporative condensation water chiller according to claim 1, wherein a condensation pressure sensor is provided on a pipeline of the mechanical refrigeration system.
3. The method for controlling a fluorine pump natural cooling evaporative type condensation water chiller according to claim 1, comprising the following control logic:
1) When the temperature detected by the outdoor temperature sensor is higher than that detected by the liquid inlet temperature sensor, the bypass connected with the natural cooling coil is closed by the three-way valve, all refrigerants of the secondary circulation system directly enter the evaporator without flowing through the natural cooling coil, and the loading and unloading control is performed by the compressor according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
2) When the temperature detected by the outdoor temperature sensor is lower than the temperature detected by the liquid inlet temperature sensor and higher than the temperature at which the fluorine pump is started and the temperature at which the compressor can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator, the cooling fan runs in full load, the fluorine pump stops running, the fluorine pump bypass electromagnetic valve is opened, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor performs loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
3) When the temperature detected by the outdoor temperature sensor is lower than the starting temperature of the fluorine pump but higher than the temperature at which the compressor can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator, the cooling fan runs in full load, the fluorine pump runs in full load, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the compressor performs loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
4) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the compressor can completely stop running but higher than the temperature at which the fluorine pump can completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the cooling fan runs in full load, the compressor and the condenser stop running, the condensing fan runs in full load, the compressor bypass electromagnetic valve and the throttler bypass electromagnetic valve are opened, the fluorine pump bypass electromagnetic valve is closed, and the fluorine pump carries out loading and unloading control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor;
5) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the fluorine pump can completely stop running but higher than the temperature at which the cooling fan can run according to the minimum air quantity or completely stop running, the three-way valve opens a bypass connected with the natural cooling coil, and all refrigerants of the secondary circulation system flow through the natural cooling coil and then enter the evaporator; the fluorine pump, the compressor and the condenser stop running, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the cooling fan performs loading and unloading control according to the temperature detected by the chilled water inlet liquid temperature sensor or the chilled water outlet liquid temperature sensor;
6) When the temperature detected by the outdoor temperature sensor is lower than the temperature at which the cooling fan can operate according to the minimum air volume or completely stop operating, the cooling fan operates according to the minimum air volume or completely stops operating, the fluorine pump, the compressor and the condenser stop operating, the compressor bypass electromagnetic valve, the fluorine pump bypass electromagnetic valve and the throttler bypass electromagnetic valve are closed, and the three-way valve performs adjustment control according to the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor.
4. The control method of the fluorine pump natural cooling evaporative type condensation water chiller according to claim 3,
in the control logics 1), 2) and 3), when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the compressor is controlled to be loaded and operated, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the compressor is controlled to be unloaded and operated;
in the control logic 4), when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the fluorine pump is controlled to be loaded and operated, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the fluorine pump is controlled to be unloaded and operated;
in the control logic 5), when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the cooling fan is controlled to be loaded and operated, and when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than the set value, the cooling fan is controlled to be unloaded and operated;
in the control logic 6), when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is higher than a set value, the three-way valve is controlled to open a bypass connected with the natural cooling coil; when the temperature detected by the liquid inlet temperature sensor or the liquid outlet temperature sensor is lower than a set value, the three-way valve is controlled to close the bypass connected with the natural cooling coil.
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| CN201720511042.0UActiveCN206695309U (en) | 2017-04-20 | 2017-05-10 | A kind of fluorine pump natural cooling evaporating type condensing cooling-water machine |
| CN201710323820.8AActiveCN107014016B (en) | 2017-04-20 | 2017-05-10 | Fluorine pump natural cooling evaporation type condensation water chiller and control method thereof |
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| CN206695309U (en)* | 2017-04-20 | 2017-12-01 | 广东申菱环境系统股份有限公司 | A kind of fluorine pump natural cooling evaporating type condensing cooling-water machine |
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