CN112484160B - Air conditioner with self-controlled air suction temperature - Google Patents

Abstract

The application relates to an air conditioner with automatic suction temperature control, belonging to the technical field of air conditioners. The application includes: the auxiliary electric heating device is arranged in a return air channel of the indoor unit of the air conditioner, and heats return air of the indoor unit of the air conditioner during refrigeration, and then the heated return air flows through the evaporator so as to reduce air suction temperature fluctuation by increasing evaporation load of the evaporator. Through this application, help guaranteeing the stability of the temperature of breathing in when guaranteeing refrigeration, and then guarantee system performance stability, improve the operational reliability of air conditioner.

Description

Air conditioner with self-controlled air suction temperature

Technical Field

The application belongs to the technical field of air conditioners, and particularly relates to an air conditioner with automatic suction temperature control.

Background

Most of the existing household and commercial air conditioners are based on the working principle of vapor compression refrigeration cycle, and perform refrigeration through the interaction of an evaporator, a compressor, a condenser and a throttling structure. In the actual design process, the factors to be considered are not only the selection of the four components, but also the matching of the performance is needed. Factors to be considered when performing performance matching include a cooling capacity within a reasonable range, a superheat within a reasonable range, and the like. In the process, severe fluctuation of the suction temperature is also encountered, which is caused by incomplete evaporation of the refrigerant in the evaporator, the performance of the whole system is unstable due to the fluctuation of the suction temperature, and the reliability of the operation of the compressor is reduced.

Disclosure of Invention

For overcoming the problem that exists among the correlation technique at least to a certain extent, this application provides the air conditioner of temperature automatic control of breathing in, helps guaranteeing the stability of temperature of breathing in when guaranteeing refrigeration, and then ensures system performance stability, improves the operational reliability of air conditioner.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the application provides an air conditioner of temperature automatic control breathes in, includes:

and the auxiliary electric heating device is arranged in a return air channel of the indoor unit of the air conditioner, and heats return air of the indoor unit of the air conditioner during refrigeration, and then the heated return air flows through the evaporator so as to reduce air suction temperature fluctuation by increasing the evaporation load of the evaporator.

Furthermore, the auxiliary electric heating device is arranged at an air return inlet of the indoor unit of the air conditioner.

Further, the air conditioner further includes:

the air suction temperature sensor is arranged on a refrigerant flow path from the outlet of the evaporator to the inlet of the compressor and used for detecting air suction temperature;

and the controller is used for acquiring the detected air suction temperature during refrigeration, judging whether the air suction temperature fluctuates abnormally or not, and if the fluctuation is abnormal, starting the auxiliary electric heating device to perform heating control to enable the heated return air to flow through the evaporator so as to reduce the fluctuation of the air suction temperature by increasing the evaporation load of the evaporator.

Further, the determining whether the fluctuation of the intake air temperature is abnormal includes:

and if the difference value between the maximum value and the minimum value of the air suction temperature is detected to be greater than or equal to the preset temperature during the continuous preset time period, judging that the air suction temperature fluctuation is abnormal.

Further, if the wave motion is abnormal, the auxiliary electric heating device is started to carry out heating control, and the method comprises the following steps:

starting the lowest heating gear of the auxiliary electric heating device, then judging whether the air suction temperature fluctuates abnormally again, increasing a heating gear every time when the fact that the fluctuation is abnormal is judged, and continuously judging whether the air suction temperature fluctuates abnormally again;

the auxiliary electric heating device is provided with a plurality of heating gears, and the higher the heating gear is, the larger the electric heating capacity is.

Further, the controller is further configured to:

and after the auxiliary electric heating device is started for heating control and the fluctuation is normal, keeping the auxiliary electric heating device to be heated unchanged during the refrigeration period.

Further, the controller is further configured to:

if the auxiliary electric heating device is started during the refrigeration period, the auxiliary electric heating device is turned off when a refrigeration turning-off instruction is received, and the refrigeration is turned off in a delayed manner.

Further, the air conditioner further includes:

and the auxiliary induced draft fan is connected with the controller, is configured in the return air channel and is used for enhancing return air.

Further, the controller is further configured to:

when the auxiliary electric heating device is started to carry out heating control, the auxiliary induced draft fan is also controlled to be started at the same time.

Further, the controller is further configured to:

and when the auxiliary electric heating device is controlled to be closed, the auxiliary induced draft fan is closed in a delayed manner.

This application adopts above technical scheme, possesses following beneficial effect at least:

this application is through the return air passageway configuration auxiliary electric heating device at air conditioner indoor set, and auxiliary electric heating device heats the back to the return air of air conditioner indoor set when refrigeration, and the evaporimeter is flowed through to the return air of heating, can increase the evaporation load of evaporimeter, helps making the evaporimeter evaporation abundant to reduce the temperature fluctuation of breathing in, the steady work of guarantee compressor. And further, the air conditioner is beneficial to guaranteeing the stability of the air suction temperature while guaranteeing refrigeration, guaranteeing the stability of system performance and improving the operation reliability of the air conditioner.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a portion of an air conditioner with self-controlled suction temperature according to an exemplary embodiment;

fig. 2 is a schematic view of a partial structure of an air conditioner with self-control of suction temperature according to another exemplary embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic partial structural diagram illustrating an air conditioner with self-controlled suction temperature according to an exemplary embodiment, and as shown in fig. 1, the air conditioner with self-controlled suction temperature includes:

and an auxiliaryelectric heater 11 disposed in areturn air duct 12 of an indoor unit of an air conditioner, wherein the auxiliaryelectric heater 11 heats return air of the indoor unit of the air conditioner during cooling, and the heated return air flows through theevaporator 13 to increase an evaporation load of theevaporator 13 to reduce fluctuation of an intake air temperature.

Specifically, thereturn air channel 12 of the indoor unit of the air conditioner is used for conveying indoor return air to theevaporator 13, the direction of an arrow in fig. 1 shows the return air direction, the return air is cooled again through heat exchange with theevaporator 13, and then the return air is conveyed out from the outlet channel of the indoor unit to continuously cool the indoor. There is a problem in that if the refrigerant is insufficiently evaporated in theevaporator 13, the suction temperature of the compressor may fluctuate sharply, so that the performance of the entire system is unstable and the reliability of the operation of the compressor may be lowered. For solving this problem, this application is considering the influence of minimizing to refrigeration, through theair return passageway 12 configuration auxiliaryelectric heating device 11 at air conditioner indoor set, auxiliaryelectric heating device 11 heats the back to the return air of air conditioner indoor set when refrigerating, the return air temperature obtains promoting, the return air through the heating flows throughevaporimeter 13, can increaseevaporimeter 13's evaporation load, help makingevaporimeter 13 evaporation abundant, thereby it is undulant to reduce the temperature of breathing in, the steady operation of guarantee compressor, and then the stable performance of guarantee whole air conditioner system. Therefore, the air conditioner has the advantages that the stability of the air suction temperature is guaranteed while refrigeration is guaranteed, the refrigeration performance of the system is guaranteed to be stable, and the operation reliability of the air conditioner is improved.

Referring to fig. 1, in one embodiment, the auxiliaryelectric heating device 11 is disposed at a return air inlet of an indoor unit of an air conditioner.

Specifically, the auxiliaryelectric heating device 11 is installed and configured at the air return opening of the indoor unit of the air conditioner, so that the mutual influence between the layout design inside theair return channel 12 and the auxiliaryelectric heating device 11 is not needed to be considered, and meanwhile, the auxiliaryelectric heating device 11 is convenient to install.

Referring to fig. 2, fig. 2 is a schematic partial structural diagram of an air conditioner with self-controlled suction temperature according to another exemplary embodiment, and as shown in fig. 2, the air conditioner with self-controlled suction temperature further includes:

an intakeair temperature sensor 14 disposed on a refrigerant flow path from an outlet of theevaporator 13 to an inlet of thecompressor 15, for detecting an intake air temperature;

and a controller 16 for acquiring the detected suction temperature during cooling, determining whether the suction temperature fluctuates abnormally, and if the fluctuation is abnormal, starting the auxiliaryelectric heating device 11 to perform heating control to allow the heated return air to flow through theevaporator 13 so as to reduce the suction temperature fluctuation by increasing the evaporation load of theevaporator 13.

Specifically, after theevaporator 13 exchanges heat with return air, the direction of an arrow in fig. 2 shows the direction of the return air, and a heat-absorbing refrigerant flows from an outlet of theevaporator 13 to an inlet of thecompressor 15, and if the heat absorption of the refrigerant in theevaporator 13 is insufficient, the suction temperature of thecompressor 15 may fluctuate abnormally, so that thecompressor 15 operates unstably, and further the refrigeration of the entire air conditioner system fluctuates. Through the scheme, the accurate grasping and control of the moment of reducing the suction temperature fluctuation by opening the auxiliaryelectric heating device 11 is facilitated when the air conditioner refrigerates. During refrigeration, the controller 16 can detect the suction temperature in real time by using thesuction temperature sensor 14 arranged on a refrigerant flow path from the outlet of theevaporator 13 to the inlet of thecompressor 15 to judge whether the suction temperature is abnormal in fluctuation, and when the fluctuation is abnormal, the auxiliaryelectric heating device 11 is started to perform heating control to raise the return air temperature, after the heated return air flows through theevaporator 13, the load of theevaporator 13 can be raised, the refrigerant can be more fully evaporated, the suction temperature fluctuation is reduced, the fully evaporated refrigerant enters thecompressor 15 to ensure the running reliability of thecompressor 15, and further, the refrigeration performance of the system is stable.

In one embodiment, the determining whether the fluctuation of the intake air temperature is abnormal includes:

and if the difference value between the maximum value and the minimum value of the air suction temperature is detected to be greater than or equal to the preset temperature during the continuous preset time period, judging that the air suction temperature fluctuation is abnormal.

Specifically, the preset time and the preset temperature may be obtained according to engineering tests, for example, the preset time is 10 minutes, and the preset temperature is 1 ℃. That is, when the difference between the maximum value and the minimum value of the suction temperature is detected to be greater than or equal to 1 ℃, and the difference between the maximum value and the minimum value is detected to be greater than or equal to 1 ℃ within 10 minutes continuously, the suction temperature fluctuation is judged to be abnormal, and the auxiliaryelectric heating device 11 needs to be started for heating control to reduce the suction temperature fluctuation and return the suction temperature fluctuation to normal.

In one embodiment, if the wave motion is abnormal, the auxiliaryelectric heating device 11 is activated for heating control, including:

starting the lowest heating gear of the auxiliaryelectric heating device 11, then, judging whether the air suction temperature fluctuates abnormally again, increasing a heating gear every time when the fact that the fluctuation is abnormal is judged, and continuously judging whether the air suction temperature fluctuates abnormally again;

the auxiliaryelectric heating device 11 has a plurality of heating stages, and the higher the heating stage is, the larger the electric heating capacity is.

Specifically, the heating gear is gradually increased from small to large through the scheme, so that the influence on indoor refrigeration can be reduced as much as possible on the basis of reducing the fluctuation of the suction temperature and enabling the fluctuation of the suction temperature to return to normal. Specifically, the refrigerant in theevaporator 13 has an upper heat absorption limit from insufficient evaporation to sufficient evaporation, and if the auxiliaryelectric heating device 11 is not fully turned on, the auxiliaryelectric heating device 11 may release heat more than the upper heat absorption limit, that is, a part of heat may not exchange heat with theevaporator 13 and directly enter the room, which is obviously unfavorable for indoor cooling.

According to the scheme, the heating gears are gradually increased from small to large, when the difference value between the maximum value and the minimum value of the suction temperature detected within 10 minutes is not less than 1 ℃, the problem that the fluctuation of the suction temperature of the system is abnormal is judged, the controller 16 controls the auxiliaryelectric heating device 11 to start the minimum heating gear (for example, the first gear is the minimum gear), then whether the suction temperature is abnormal is continuously judged, if the difference value between the maximum value and the minimum value of the suction temperature detected within 10 minutes is still not less than 1 ℃, the fluctuation of the suction temperature of the system is judged to be still abnormal, then the controller 16 controls the auxiliaryelectric heating device 11 to increase one heating gear (for example, the second gear is started), and the like, until the suction temperature is judged to be normal.

In the process of controlling the gear of the auxiliaryelectric heating device 11, if the suction temperature is judged to be normal after the gear is adjusted to the second gear, the rest gears are not considered, namely, the heating of the auxiliaryelectric heating device 11 is reduced as much as possible to release the excessive heat, and the adverse effect of the excessive heat on indoor refrigeration caused by the fact that the excessive heat cannot be absorbed by theevaporator 13 is avoided.

In practical application, the more heating gears of the auxiliaryelectric heating device 11 can be, the better, and when the heating gears are lifted from small to large, the more gears are, the more the heating of the auxiliaryelectric heating device 11 can be reduced as much as possible to release excessive heat.

In one embodiment, the controller 16 is further configured to:

after the auxiliaryelectric heating device 11 is started for heating control and the fluctuation is normal, the auxiliaryelectric heating device 11 is kept heating during the refrigeration.

Specifically, the controller 16 determines that the fluctuation of the suction temperature of the air conditioner system is abnormal, controls the auxiliaryelectric heating device 11 to start a heating gear, and then continuously determines whether the fluctuation of the suction temperature is abnormal, and if the fluctuation of the suction temperature is determined to be normal, the heating gear is kept unchanged during the whole refrigeration period, so that the fluctuation of the suction temperature is continuously stabilized.

In one embodiment, the controller 16 is further configured to:

if the auxiliaryelectric heating device 11 is turned on during the cooling period, when a cooling turn-off instruction is received, the auxiliaryelectric heating device 11 is turned off, and the cooling is turned off in a delayed manner.

Specifically, in the present application, if the auxiliaryelectric heating device 11 is turned on during the cooling period, when a cooling closing instruction sent by the user through the remote controller is received, the cooling is not immediately stopped, but is turned off after a certain time of delayed operation, for example:time delay refrigeration 15 seconds is closed again, can cool down auxiliaryelectric heating device 11 self on the one hand, help guaranteeing its performance safety, on the other hand, when auxiliaryelectric heating device 11 is closed, it still has fairly high heat itself, this belongs to very strong heat source indoor in summer, air conditioner refrigeration stops the back, this part heat can further accelerate the recovery of indoor hot temperature, probably improve indoor hot temperature even, through this application above-mentioned scheme, when the air conditioner received and closes the refrigeration instruction, the action of making a response is to close auxiliaryelectric heating device 11, and the refrigeration is closed in time delay, take away the remaining heat after auxiliaryelectric heating device 11 closes through time delay refrigeration, it forms adverse effect to indoor temperature to avoid the remaining heat after auxiliaryelectric heating device 11 closes in summer.

Referring to fig. 2, in an embodiment, the air conditioner further includes:

and the auxiliary induceddraft fan 17 is connected with the controller 16, is configured in thereturn air channel 12 and is used for enhancing return air.

Specifically, when the auxiliaryelectric heating device 11 is disposed in thereturn air channel 12, it will form an air intake block for the return air itself, and when the auxiliaryelectric heating device 11 is turned on to heat, some of the heat generated by the auxiliaryelectric heating device 11 may be dissipated to the outside and into the room, which will adversely affect the indoor temperature, and more importantly, this will result in that the heat generated by the auxiliaryelectric heating device 11 cannot be sufficiently provided to the heat exchange surface of theevaporator 13, which is disadvantageous for controlling the suction temperature. Through above-mentioned scheme, further set upsupplementary draught fan 17, the reinforcing return air helps avoiding the heat that supplementaryelectric heater unit 11 produced to spill to the external environment, is favorable to the abundant and abundant provision of the heat that the electrical heating produced to theevaporimeter 13 heat-transfer surface again simultaneously, reduces the fluctuation of inspiratory temperature, and also helps avoiding opening the problem that higher heating gear leads to supplementaryelectric heater unit 11 heats the unnecessary heat of release.

In one embodiment, the controller 16 is further configured to:

when the auxiliaryelectric heating device 11 is started to carry out heating control, the auxiliary induceddraft fan 17 is also controlled to be started at the same time.

Specifically, when the air conditioner operates in a cooling mode, the controller 16 starts to detect whether the suction temperature fluctuates abnormally, for example, when the difference value between the maximum value and the minimum value of the suction temperature detected within 10 minutes continuously for the first time is not less than 1 ℃, the problem that the suction temperature fluctuates abnormally in the system is judged, the controller 16 controls the auxiliaryelectric heating device 11 to start the minimum heating gear, and meanwhile, the auxiliary induceddraft fan 17 is controlled to start. The auxiliaryelectric heating device 11 is guaranteed to be placed to emit heating heat to the outside from the moment when being started, the heat generated by heating is sufficiently and fully provided to the heat exchange surface of theevaporator 13, and the problem that the auxiliaryelectric heating device 11 is heated to release redundant heat due to the fact that a higher heating gear is started is avoided.

In one embodiment, the controller 16 is further configured to:

and when the auxiliaryelectric heating device 11 is controlled to be closed, the auxiliary induceddraft fan 17 is closed in a delayed mode.

Specifically, in this application, if auxiliaryelectric heater unit 11 is opened during the refrigeration, when the air conditioner receives the instruction of closing refrigeration that the user sent through the remote controller, the action of responding is to close auxiliaryelectric heater unit 11, and the refrigeration is closed in the time delay,auxiliary draught fan 17 is closed in the time delay simultaneously, closeauxiliary draught fan 17 through the time delay, the residual heat after avoiding auxiliaryelectric heater unit 11 to be closed dispels the outside, let the residual heat after auxiliaryelectric heater unit 11 is closed fully exchange heat withevaporimeter 13, the refrigerating system who is closed by the time delay takes away to outdoors, further guarantee to avoid when summer residual heat forms adverse effect to indoor temperature after auxiliaryelectric heater unit 11 closes.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, the meaning of "plurality" means at least two unless otherwise specified.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, and further, as used herein, connected may include wirelessly connected; the term "and/or" is used to include any and all combinations of one or more of the associated listed items.

Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (9)

1. An air conditioner with self-controlled suction temperature, comprising:

the auxiliary electric heating device is arranged in a return air channel of the indoor unit of the air conditioner, and the heated return air flows through the evaporator after the auxiliary electric heating device heats the return air of the indoor unit of the air conditioner during refrigeration so as to reduce the fluctuation of the suction temperature by increasing the evaporation load of the evaporator;

the air suction temperature sensor is arranged on a refrigerant flow path from the outlet of the evaporator to the inlet of the compressor and used for detecting air suction temperature;

and the controller is used for acquiring the detected air suction temperature during refrigeration, judging whether the air suction temperature fluctuates abnormally or not, and if the fluctuation is abnormal, starting the auxiliary electric heating device to perform heating control to enable the heated return air to flow through the evaporator so as to reduce the fluctuation of the air suction temperature by increasing the evaporation load of the evaporator.

2. The air conditioner according to claim 1, wherein the auxiliary electric heating device is disposed at a return air inlet of an indoor unit of the air conditioner.

3. The air conditioner according to claim 1, wherein said judging whether the suction temperature is abnormally fluctuated comprises:

and if the difference value between the maximum value and the minimum value of the air suction temperature is detected to be greater than or equal to the preset temperature during the continuous preset time period, judging that the air suction temperature fluctuation is abnormal.

4. The air conditioner according to claim 1, wherein if the fluctuation is abnormal, the starting of the auxiliary electric heating device for heating control includes:

starting the lowest heating gear of the auxiliary electric heating device, then judging whether the air suction temperature fluctuates abnormally again, increasing a heating gear every time when the fact that the fluctuation is abnormal is judged, and continuously judging whether the air suction temperature fluctuates abnormally again;

the auxiliary electric heating device is provided with a plurality of heating gears, and the higher the heating gear is, the larger the electric heating capacity is.

5. The air conditioner of claim 1, wherein the controller is further configured to:

and after the auxiliary electric heating device is started for heating control and the fluctuation is normal, keeping the auxiliary electric heating device to be heated unchanged during the refrigeration period.

6. The air conditioner of claim 4, wherein the controller is further configured to:

if the auxiliary electric heating device is started during the refrigeration period, the auxiliary electric heating device is turned off when a refrigeration turning-off instruction is received, and the refrigeration is turned off in a delayed manner.

7. The air conditioner according to any one of claims 1 to 6, further comprising:

and the auxiliary induced draft fan is connected with the controller, is configured in the return air channel and is used for enhancing return air.

8. The air conditioner of claim 7, wherein the controller is further configured to:

when the auxiliary electric heating device is started to carry out heating control, the auxiliary induced draft fan is also controlled to be started at the same time.

9. The air conditioner of claim 8, wherein the controller is further configured to:

and when the auxiliary electric heating device is controlled to be closed, the auxiliary induced draft fan is closed in a delayed manner.

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