Disclosure of Invention
The invention provides a controller heat dissipation system based on a two-stage compressor system and a control method thereof, which at least solve the problem that the coolant heat dissipation technology in the prior art can cause condensation of a controller module.
To solve the above technical problem, according to an aspect of the embodiments of the present invention, there is provided a controller heat dissipation system applied to a dual-stage compressor system, including: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch is connected with an air outlet of the two-stage compressor 9, and the other end of the first branch is connected with an inlet of the heat exchanger and is used for introducing a refrigerant discharged by the two-stage compressor 9 into the heat exchanger to exchange heat; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator 2, and the second branch passes through the heat dissipation module 16 of the controller and is used for dissipating heat of the heat dissipation module 16.
Further, the heat exchanger is a U-shaped pipe at the bottom of the condenser 14; wherein the number of U-shaped pipes is one or more.
Further, the system further comprises: and the throttling element 17 is positioned between the heat radiation module 16 and the flash evaporator 2 and is used for controlling the on-off of a refrigerant heat radiation pipeline.
Further, the system further comprises: the air cooling module is connected with the heat dissipation module 16 and is used for dissipating heat of the heat dissipation module 16 through air flow.
According to another aspect of the embodiments of the present invention, there is provided a controller heat dissipation control method applied to a controller heat dissipation system as described above, including: after the unit is started for a preset time, detecting the ambient temperature and the running frequency of the compressor; determining a heat dissipation mode of the controller according to the ambient temperature and/or the compressor operating frequency; and radiating the heat of the controller according to the heat radiation mode.
Further, determining a heat dissipation mode of the controller according to the ambient temperature and/or the compressor operating frequency includes: acquiring an operation mode of a unit; wherein the operation modes at least comprise a heating mode and a cooling mode; when the operation mode of the unit is a refrigeration mode, determining a heat dissipation mode of the controller according to the ambient temperature and the operation frequency of the compressor; when the operation mode of the unit is a heating mode, determining a heat dissipation mode of the controller according to the operation frequency of the compressor; the heat dissipation mode at least comprises refrigerant heat dissipation and air cooling heat dissipation.
Further, determining a heat dissipation mode of the controller according to the ambient temperature and the operating frequency of the compressor, comprising: judging whether the ambient temperature is greater than or equal to a first preset temperature or not, and judging whether the running frequency of the compressor is greater than or equal to a preset frequency or not; if the ambient temperature is greater than or equal to a first preset temperature and the operating frequency of the compressor is greater than or equal to a preset frequency, determining a heat dissipation mode as coolant heat dissipation; otherwise, determining the heat dissipation mode as air-cooling heat dissipation.
Further, determining a heat dissipation mode of the controller according to an operating frequency of the compressor includes: judging whether the running frequency of the compressor is greater than or equal to a preset frequency; if the operation frequency of the compressor is greater than or equal to the preset frequency, determining that the heat dissipation mode is coolant heat dissipation; otherwise, determining the heat dissipation mode as air-cooling heat dissipation.
Further, the controller is cooled according to a cooling mode, including: when the heat radiation mode is coolant heat radiation, a throttling element of a coolant heat radiation pipeline is opened, the opening is regulated to a first preset opening, and the coolant is used for radiating heat of the controller; when the heat dissipation mode is air cooling heat dissipation, the air cooling module is started, and the controller is subjected to heat dissipation through air flow.
Further, after opening the throttling element of the refrigerant heat dissipation pipeline and adjusting to the first preset opening, the method further comprises: detecting the temperature of the controller; judging the load state of the controller according to the temperature of the controller; the opening degree of the throttle element is controlled according to the load state.
Further, the load states include at least a high load state and a limit load state; judging the load state of the controller according to the temperature of the controller, comprising: when the temperature of the controller is greater than or equal to the second preset temperature and less than or equal to the third preset temperature, determining that the load state of the controller is a high load state; wherein the third preset temperature is greater than the second preset temperature; and when the temperature of the controller is higher than a third preset temperature, determining the load state of the controller as a limit load state.
Further, controlling the opening degree of the throttle element according to the load state includes: when the load state is a high load state, increasing the opening degree of the throttling element to a second preset opening degree; and when the load state is the limit load state, adjusting the opening degree of the throttling element to the maximum opening degree.
Further, after adjusting the opening degree of the throttling element to the maximum opening degree, the method further includes: re-detecting the current temperature of the controller after the preset waiting time; and if the current temperature of the controller is greater than the third preset temperature, controlling the unit to enter into shutdown protection.
According to still another aspect of the embodiment of the present invention, an air conditioning unit is provided, which includes the controller cooling system described above, or adopts the controller cooling control method described above.
According to yet another aspect of embodiments of the present invention, there is provided a storage medium containing computer executable instructions for performing a controller heat dissipation control method as described above when executed by a computer processor.
In the present invention, a novel controller heat dissipation system applied to a two-stage compressor system is provided, comprising: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch is connected with the air outlet of the two-stage compressor, and the other end of the first branch is connected with the inlet of the heat exchanger and is used for introducing the refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for radiating heat of the heat radiating module through the heat radiating module of the controller. Through the mode, the problem that the cooling medium heat dissipation technology in the prior art can cause the controller module to generate condensation is effectively solved, the condensation is avoided, meanwhile, enough refrigerating capacity is ensured when cooling by adopting cooling medium, the temperature change of the controller heat dissipation module is smaller when the cooling and heating modes are switched, and the reliability of the controller is improved.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
Example 1
In a preferred embodiment 1 of the present invention, a controller heat dissipation system is provided for use in a dual stage compressor system, and in particular, fig. 1 shows an alternative structural schematic diagram of the system, as shown in fig. 1, the system comprising:
the refrigerant heat dissipation pipeline comprises a first branch and a second branch; wherein,
one end of the first branch is connected with the air outlet of the two-stage compressor 9, and the other end of the first branch is connected with the inlet of the heat exchanger, and is used for introducing the refrigerant discharged by the two-stage compressor 9 into the heat exchanger for heat exchange;
one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator 2, and the second branch passes through the heat dissipation module 16 of the controller and is used for dissipating heat of the heat dissipation module 16.
In the above embodiments, a novel controller heat dissipation system applied to a two-stage compressor system is provided, including: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch is connected with the air outlet of the two-stage compressor, and the other end of the first branch is connected with the inlet of the heat exchanger and is used for introducing the refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for radiating heat of the heat radiating module through the heat radiating module of the controller. Through the mode, the problem that the cooling medium heat dissipation technology in the prior art can cause the controller module to generate condensation is effectively solved, the condensation is avoided, meanwhile, enough refrigerating capacity is ensured when cooling by adopting cooling medium, the temperature change of the controller heat dissipation module is smaller when the cooling and heating modes are switched, and the reliability of the controller is improved.
In order to avoid the problem that the flow of the refrigerant is reduced due to the traditional refrigerant heat dissipation mode, the heat exchanger adopts a U-shaped pipe at the bottom of the condenser 14; the number of the U-shaped pipes can be one or more according to heat dissipation requirements. The U-shaped pipe at the bottom of the condenser can reduce the influence on a main refrigerant flow path, can ensure enough refrigerating capacity when adopting the refrigerant to dissipate heat, can ensure the reliable operation of the whole machine under the high-temperature working condition, and simultaneously ensures that the whole machine continuously outputs higher refrigerating capacity under the high temperature.
Preferably, the system further comprises: and the throttling element 17 is positioned between the heat radiation module 16 and the flash evaporator 2 and is used for controlling the on-off of a refrigerant heat radiation pipeline.
In the above embodiment, the inlet of the refrigerant heat dissipation pipeline is located at the exhaust port of the compressor, and before the four-way valve component, the refrigerant heat dissipation pipeline adopts a thin copper pipe, and a part of high-temperature and high-pressure refrigerant is led out through the thin copper pipe and separately enters the condenser, so that the bottommost U-shaped branch of the condenser is used, (the number of U-shaped pipes can be increased, the influence on the whole machine capability is avoided being larger, the number of U-shaped pipes cannot be excessive), the larger condensation effect can be achieved, and meanwhile, defrosting is convenient in a heating mode. After condensation, the refrigerant reaches a saturated state, enters the controller heat dissipation module, and then enters the throttling element, wherein the throttling element can be an electronic expansion valve, the temperature is reduced after throttling, the pressure is reduced, the refrigerant returns to the flash evaporator, and the refrigerant enters the whole circulation again after flash evaporation.
In the invention, besides using a refrigerant to dissipate heat, an air cooling module is reserved, fig. 2 shows an optional structural schematic diagram of the system, as shown in fig. 2, an air cooling module 19 comprises the following content, 18 is an external machine set diversion wind direction, the external machine fan rotates to increase the air cooling flow rate, the heat dissipation capacity of a fin heat exchanger of the air cooling module is guaranteed, 23 consists of aluminum blocks and is tightly attached to the fin heat exchanger to form the same module, the heat exchange efficiency is guaranteed, 22 consists of the same aluminum blocks, the aluminum blocks are combined, a copper pipe diameter space is reserved in the middle, the copper pipe is wrapped by the aluminum blocks and is fixed by 21 fastening screws; wherein 20 is a driving module which is embedded into an aluminum block to ensure that the driving chip dissipates heat smoothly; and 24 is that the refrigerant returns to the flash tank after passing through the heat radiation module. The air cooling module is connected with the heat dissipation module and is used for dissipating heat of the heat dissipation module through air flow. In addition, fig. 2 also shows a second branch of the refrigerant heat dissipation pipeline, namely, the refrigerant flowing out from the bottom of the condenser enters the radiator to dissipate heat.
The air cooling module has no influence on a refrigerant flow path of the unit and does not occupy energy, so that the energy-saving effect can be achieved. The system simultaneously uses the refrigerant heat dissipation and air cooling heat dissipation structures, and when the load of the controller plate is low, an air cooling mode is adopted, so that the system refrigerant is prevented from being used for heat dissipation, and the refrigeration capacity loss of the system is avoided; when the load of the whole system controller module is detected to be large, the controller module is prevented from being damaged through cooling media to ensure that the cooling media flow into the flash evaporator to participate in the whole circulation, the refrigerating capacity is ensured to be sufficient, and the flash evaporation air supplementing effect is ensured.
In conclusion, the system can apply the refrigerant heat dissipation technology to the temperature heat dissipation of the two-stage compression system controller module, and improves the reliability of the controller. The device can ensure the reliable operation of the whole machine under the ultra-high temperature working condition, ensure the continuous output of higher refrigerating output of the sample whole machine under high frequency, and can continuously and stably operate with reliability.
Example 2
Based on the controller heat dissipation system provided in the above embodiment 1, a controller heat dissipation control method is provided in a preferred embodiment 2 of the present invention. Specifically, fig. 3 shows an alternative flow chart of the method, as shown in fig. 3, comprising the following steps S302-S306:
s302: after the unit is started for a preset time, detecting the ambient temperature and the running frequency of the compressor;
s304: determining a heat dissipation mode of the controller according to the ambient temperature and/or the compressor operating frequency;
s306: and radiating the heat of the controller according to the heat radiation mode.
In the above embodiment, a novel controller heat dissipation control method applied to a two-stage compressor system is provided, after a unit is started for a preset time, an ambient temperature and a compressor operating frequency are detected, and a heat dissipation mode of the controller is determined according to the ambient temperature and/or the compressor operating frequency to dissipate heat. Through the mode, the problem that the cooling medium heat dissipation technology in the prior art can cause the controller module to generate condensation is effectively solved, the condensation is avoided, meanwhile, enough refrigerating capacity is ensured when cooling by adopting cooling medium, the temperature change of the controller heat dissipation module is smaller when the cooling and heating modes are switched, and the reliability of the controller is improved.
And determining a heat dissipation mode by adopting different parameters according to different operation modes of the unit. The running mode of the unit at least comprises a heating mode and a refrigerating mode; when the operation mode of the unit is a refrigeration mode, determining a heat dissipation mode of the controller according to the ambient temperature and the operation frequency of the compressor; when the operation mode of the unit is a heating mode, the environment temperature is usually lower, and the heat dissipation mode of the controller is only determined according to the operation frequency of the compressor; the heat dissipation mode at least comprises refrigerant heat dissipation and air cooling heat dissipation.
Preferably, determining the heat radiation mode of the controller according to the ambient temperature and the operation frequency of the compressor includes: judging whether the ambient temperature is greater than or equal to a first preset temperature or not, and judging whether the running frequency of the compressor is greater than or equal to a preset frequency or not; if the ambient temperature is greater than or equal to a first preset temperature and the operating frequency of the compressor is greater than or equal to a preset frequency, determining a heat dissipation mode as coolant heat dissipation; otherwise, determining the heat dissipation mode as air-cooling heat dissipation. Further, determining a heat dissipation mode of the controller according to an operating frequency of the compressor includes: judging whether the running frequency of the compressor is greater than or equal to a preset frequency; if the operation frequency of the compressor is greater than or equal to the preset frequency, determining that the heat dissipation mode is coolant heat dissipation; otherwise, determining the heat dissipation mode as air-cooling heat dissipation.
Compared with air cooling, the cooling effect of the cooling medium is better, so that the cooling medium is preferentially adopted for cooling when the operating frequency is higher and the ambient temperature is higher, and the better cooling effect is achieved. When the operating frequency is small or the ambient temperature is low, namely the heat dissipation requirement is small, air cooling heat dissipation is adopted to save energy.
Specifically, the controller is cooled according to a cooling mode, including: when the heat radiation mode is coolant heat radiation, a throttling element of a coolant heat radiation pipeline is opened, the opening is regulated to a first preset opening, and the coolant is used for radiating heat of the controller; when the heat dissipation mode is air cooling heat dissipation, the air cooling module is started, and the controller is subjected to heat dissipation through air flow.
For cooling the refrigerant, the method for adjusting the opening degree of the throttle element of the cooling pipeline to a first preset opening degree further comprises the steps of: detecting the temperature of the controller; judging the load state of the controller according to the temperature of the controller; the opening degree of the throttle element is controlled according to the load state.
In the invention, the load state is divided into a high load state and a limit load state, and other states can be divided according to actual needs and corresponding control modes can be set. For judging the load state, judging the load state of the controller by adopting the temperature of the controller, specifically comprising: when the temperature of the controller is greater than or equal to the second preset temperature and less than or equal to the third preset temperature, determining that the load state of the controller is a high load state; wherein the third preset temperature is greater than the second preset temperature; and when the temperature of the controller is higher than a third preset temperature, determining the load state of the controller as a limit load state. And the second preset temperature is greater than the first preset temperature.
After determining the load state, controlling the opening degree of the throttle element according to the load state may be performed in a manner including: when the load state is a high load state, increasing the opening degree of the throttling element to a second preset opening degree; and when the load state is the limit load state, adjusting the opening degree of the throttling element to the maximum opening degree.
In order to avoid the risk of the controller becoming too high in temperature when the load is extremely high, the throttle device is adjusted to a maximum opening degree after the load state is a limit load state, and the throttle device further includes: re-detecting the current temperature of the controller after the preset waiting time; and if the current temperature of the controller is greater than the third preset temperature, controlling the unit to enter into shutdown protection.
Through the mode, corresponding opening degrees can be executed under different load states, proper flow is achieved, unit faults under the limit condition can be avoided, and reliable operation of the unit is guaranteed.
In a preferred embodiment 2 of the present invention, another alternative controller heat dissipation control method is also provided. Specifically, fig. 4 shows an alternative flow chart of the method, as shown in fig. 4, comprising the following steps S401-S411:
s401, starting up and running;
s402, starting the compressor for 10min, and entering steps S403 and S404;
s403, detecting the frequency of the compressor;
s404, detecting the external environment temperature;
for the refrigeration mode, if the compressor frequency f is more than or equal to 65hz and the external environment temperature T is more than or equal to 46 ℃, entering a refrigerant heat dissipation control mode, namely, step S405, otherwise, entering step S406; for the heating mode, if the compressor frequency f is greater than or equal to 65hz, the refrigerant heat dissipation control mode is entered, namely step S405.
S405, opening an electronic expansion valve, entering a refrigerant heat dissipation control mode, otherwise entering a step S406;
s406, the electronic expansion valve does not act;
s407, the electronic expansion valve is adjusted from 0b to 300b for three minutes;
s408, detecting the temperature Tpfc of the controller module; if the module temperature Tpfc is less than or equal to 80 ℃, judging that the module temperature is lower and the load is smaller, and entering step S409; if the temperature Tpfc of the module is more than or equal to 90 ℃ and is more than or equal to 80 ℃, judging that the temperature of the module is relatively large, entering step S409, and adjusting the electronic expansion valve to 400b; if the module temperature Tpfc is more than or equal to 95 ℃, judging that the load of the module controller is extremely high, entering a dangerous mode, entering a step S409, and opening the valve step to 480b;
s409, the electronic expansion valve does not act;
s410, adjusting the electronic expansion valve to 400b;
s411, the electronic expansion valve is adjusted to 480b.
The cooling mode and the heating mode are separately described as follows:
for the cooling mode: firstly, detecting the ambient temperature after detecting that the starting operation of the compressor is greater than or equal to 10min, and entering a refrigerant heat dissipation control mode if the external ambient temperature T is greater than or equal to 46 ℃ and the compressor frequency f is greater than or equal to 65 Hz; otherwise, the electronic expansion valve does not act, and the air cooling module is used for cooling the refrigerant; the refrigerant heat dissipation control mode comprises the following steps: opening the throttling element, adjusting the opening of the electronic expansion valve from 0b to 300b, enabling the refrigerant to flow into the heat dissipation module, and adjusting the opening of the electronic expansion valve by detecting the temperature of the module, wherein if the optimal range of the temperature of the module is less than or equal to 80 ℃, the temperature of the module is judged to be lower, the load is smaller, the electronic expansion valve is ensured to be not operated, and the opening is maintained (in order to avoid overlarge refrigerant flow, the refrigerating capacity is influenced); if the temperature range of the module is smaller than or equal to 90 ℃ and is larger than 80 ℃, judging that the load of the controller is relatively large, and adjusting the electronic expansion valve to 400b; if the temperature of the controller module is detected to be more than or equal to 95 ℃, judging that the load of the controller is extremely high, entering a dangerous mode, and opening the valve step to 480b; if the temperature is still high after ten minutes, the controller enters a protection shutdown state.
And (3) heating the mold: only the compressor frequency is detected, and the compressor frequency f is greater than or equal to 65Hz or other values, such as 85Hz, and then enters a refrigerant heat dissipation control mode which is consistent with the refrigerant heat dissipation control mode in a refrigerating state, wherein the refrigerant heat dissipation control mode comprises: opening the throttling element, adjusting the opening of the electronic expansion valve from 0b to 300b, enabling the refrigerant to flow into the heat dissipation module, and adjusting the opening of the electronic expansion valve by detecting the temperature of the module, wherein if the optimal range of the temperature of the module is less than or equal to 80 ℃, the temperature of the module is judged to be lower, the load is smaller, the electronic expansion valve is ensured to be not operated, and the opening is maintained (in order to avoid overlarge refrigerant flow, the refrigerating capacity is influenced); if the temperature range of the module is smaller than or equal to 90 ℃ and is larger than 80 ℃, judging that the load of the controller is relatively large, and adjusting the electronic expansion valve to 400b; if the temperature of the controller module is detected to be more than or equal to 95 ℃, judging that the load of the controller is extremely high, entering a dangerous mode, and opening the valve step to 480b; under other conditions, air cooling is adopted for heat dissipation.
Through the mode, the refrigeration and heating capacity loss can be avoided under the low-temperature and low-frequency condition, the adjusting mode is more intelligent, and the cooling medium heat dissipation can be ensured not to cause larger influence on the system capacity energy efficiency.
Example 3
Based on the controller heat dissipation system provided in the above embodiment 1 and the controller heat dissipation control method provided in the embodiment 2, in a preferred embodiment 3 of the present invention, an air conditioning unit is further provided, which includes the controller heat dissipation system described above, or adopts the controller heat dissipation control method described above.
In the above embodiments, a novel controller heat dissipation system applied to a two-stage compressor system is provided, including: the refrigerant heat dissipation pipeline comprises a first branch and a second branch; one end of the first branch is connected with the air outlet of the two-stage compressor, and the other end of the first branch is connected with the inlet of the heat exchanger and is used for introducing the refrigerant discharged by the two-stage compressor into the heat exchanger for heat exchange; one end of the second branch is connected with an outlet of the heat exchanger, the other end of the second branch is connected with the flash evaporator, and the second branch is used for radiating heat of the heat radiating module through the heat radiating module of the controller. Through the mode, the problem that the cooling medium heat dissipation technology in the prior art can cause the controller module to generate condensation is effectively solved, the condensation is avoided, meanwhile, enough refrigerating capacity is ensured when cooling by adopting cooling medium, the temperature change of the controller heat dissipation module is smaller when the cooling and heating modes are switched, and the reliability of the controller is improved.
Example 4
Based on the controller heat dissipation control method provided in the above-described embodiment 2, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for executing the controller heat dissipation control method as described above when executed by a computer processor.
In the above embodiment, a novel controller heat dissipation control method applied to a two-stage compressor system is provided, after a unit is started for a preset time, an ambient temperature and a compressor operating frequency are detected, and a heat dissipation mode of the controller is determined according to the ambient temperature and/or the compressor operating frequency to dissipate heat. Through the mode, the problem that the cooling medium heat dissipation technology in the prior art can cause the controller module to generate condensation is effectively solved, the condensation is avoided, meanwhile, enough refrigerating capacity is ensured when cooling by adopting cooling medium, the temperature change of the controller heat dissipation module is smaller when the cooling and heating modes are switched, and the reliability of the controller is improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.