Heat exchange system, method and device for controlling a heat exchange system

Abstract

The application relates to the technical field of heat exchange systems, and discloses a heat exchange system, a method and a device for controlling the heat exchange system. The heat exchange system further comprises a liquid storage tank arranged in a second refrigerant pipeline; a first bypass pipeline connected between the first refrigerant pipeline and the liquid storage tank; a first valve arranged in the first bypass pipeline; and a second throttling device, wherein the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger connected in series, the second throttling device is connected between the first heat exchanger and the second heat exchanger, and the second throttling device can work in a throttling mode or a non-throttling mode. The embodiment can realize constant temperature, temperature rise dehumidification, compressor air supplement enthalpy increase, refrigerant circulation amount adjustment and other functions, and the structure of the heat exchange system is reduced, and the production cost of the heat exchange system is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange systems, for example to a heat exchange system, a method and device for controlling a heat exchange system. BACKGROUND

[0002] The heat exchange system in the air conditioner usually has a refrigeration mode and a heating mode. Through the circulation of refrigerant in the circuit formed by the compressor-outdoor heat exchanger-throttling component-indoor heat exchanger-compressor, the temperature and humidity in the room can be improved, and the comfort of the user can be improved.

[0003] With the development of technology and different use requirements of users, the heat exchange system can realize multiple functions, such as dehumidification, adjusting the amount of refrigerant participating in the refrigeration cycle in the heat exchange system, increasing the heating capacity of the compressor, etc. However, in the related art, different modules are needed to realize different functions of the heat exchange system. When the heat exchange system can simultaneously realize multiple functions, the heat exchange system needs multiple structures, which is relatively high in cost.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] To have a basic understanding of some aspects of the disclosed embodiments, a brief overview is given below. The summary is not an overview in a general sense, nor is it intended to determine key / important elements or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0006] The heat exchange system, the method and device for controlling the heat exchange system provided by the embodiments of the present disclosure can reduce the structure of the heat exchange system when the heat exchange system simultaneously realizes multiple functions, and the cost is relatively low.

[0007] In some embodiments, the heat exchange system includes a compressor, a four-way reversing valve, an outdoor heat exchanger, a first throttling device, and at least one indoor heat exchanger, which are sequentially connected by a refrigerant pipeline. A first refrigerant pipeline is connected between a first end of the four-way reversing valve and the outdoor heat exchanger. A second refrigerant pipeline is connected between the outdoor heat exchanger and the first throttling device. The first throttling device can work in throttling or non-throttling connection. The heat exchange system further includes a liquid storage tank provided in the second refrigerant pipeline, a first bypass pipeline connected between the first refrigerant pipeline and the liquid storage tank, a first valve provided in the first bypass pipeline, and a second throttling device. The indoor heat exchanger includes a first heat exchanger and a second heat exchanger connected in series. The second throttling device is connected between the first heat exchanger and the second heat exchanger. The second throttling device can work in throttling or non-throttling connection.

[0008] In some embodiments, the first throttling device comprises: a first electronic expansion valve; a second bypass pipeline, which is in parallel communication between the second refrigerant pipeline and the indoor heat exchanger with the first electronic expansion valve; and a second valve, which is arranged in the second bypass pipeline.

[0009] In some embodiments, the second throttling device comprises a second electronic expansion valve; and / or, the first valve comprises a third electronic expansion valve.

[0010] In some embodiments, the number of indoor heat exchangers is multiple, and the multiple indoor heat exchangers in parallel are located between the second end of the four-way reversing valve and the first throttling device.

[0011] In some embodiments, the indoor heat exchanger further comprises: a third throttling device, which is in communication between the first throttling device and the first heat exchanger, and the third throttling device can work throttling or non-throttling.

[0012] In some embodiments, the third throttling device comprises: a fourth electronic expansion valve; a third bypass pipeline, which is in parallel communication between the first throttling device and the first heat exchanger with the fourth electronic expansion valve; and a third valve, which is arranged in the third bypass pipeline.

[0013] In some embodiments, the heat exchange system is any one of the heat exchange systems described above, and the method for controlling the heat exchange system comprises: obtaining the operating mode of the heat exchange system; and controlling the first valve, the first throttling device and the second throttling device according to the operating mode.

[0014] In some embodiments, obtaining the operating mode of the heat exchange system comprises: obtaining the indoor temperature and the indoor humidity; and determining that the operating mode is a constant temperature dehumidification mode when the indoor temperature is less than or equal to a preset temperature and the indoor humidity is greater than or equal to a preset humidity.

[0015] In some embodiments, controlling the first valve, the first throttling device and the second throttling device comprises: controlling the first valve to open to a third opening degree, the first throttling device to be in non-throttling communication and the second throttling device to work throttling when the operating mode is the constant temperature dehumidification mode.

[0016] In some embodiments, the obtaining the operation mode of the heat exchange system further comprises: in the case that the heat exchange system is in heating operation, obtaining a first outdoor temperature and a compressor frequency; in the case that the first outdoor temperature is less than or equal to a first preset temperature and the compressor frequency is greater than or equal to a preset frequency, determining that the operation mode is a first heating mode; in the case that the first outdoor temperature is less than or equal to the first preset temperature and the compressor frequency is less than the preset frequency, determining that the operation mode is a second heating mode; in the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to a second preset temperature, and the compressor frequency is greater than or equal to the preset frequency, determining that the operation mode is a third heating mode; and in the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the compressor frequency is less than the preset frequency, determining that the operation mode is a fourth heating mode.

[0017] In some embodiments, the controlling the first valve, the first throttling device and the second throttling device comprises: in the case that the operation mode is the first heating mode, controlling the first valve to operate at a first opening degree for a first preset time length and then to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; in the case that the operation mode is the second heating mode, controlling the first valve to be opened to the first opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; in the case that the operation mode is the third heating mode, controlling the first valve to operate at a second opening degree for a second preset time length and then to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; and in the case that the operation mode is the fourth heating mode, controlling the first valve to be opened to the second opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; wherein the second opening degree is less than the first opening degree.

[0018] In some embodiments, the obtaining the operation mode of the heat exchange system further comprises: in the case that the heat exchange system is in heating operation, obtaining a first outdoor temperature and a compressor frequency; in the case that the first outdoor temperature is less than or equal to a first preset temperature and the compressor frequency is greater than or equal to a preset frequency, determining that the operation mode is a first heating mode; in the case that the first outdoor temperature is less than or equal to the first preset temperature and the compressor frequency is less than the preset frequency, determining that the operation mode is a second heating mode; in the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to a second preset temperature, and the compressor frequency is greater than or equal to the preset frequency, determining that the operation mode is a third heating mode; and in the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the compressor frequency is less than the preset frequency, determining that the operation mode is a fourth heating mode.

[0019] In some embodiments, the controlling the first valve, the first throttling device and the second throttling device comprises: in the case that the operation mode is the first heating mode, controlling the first valve to operate at a first opening degree for a first preset time length and then to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; in the case that the operation mode is the second heating mode, controlling the first valve to be opened to the first opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; in the case that the operation mode is the third heating mode, controlling the first valve to operate at a second opening degree for a second preset time length and then to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; and in the case that the operation mode is the fourth heating mode, controlling the first valve to be opened to the second opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle; wherein the second opening degree is less than the first opening degree.

[0020] In some embodiments, the device for controlling the heat exchange system comprises a processor and a memory storing program instructions for refrigeration, and the processor is configured to execute the method for controlling the heat exchange system as described in any of the preceding embodiments when the program instructions are executed.

[0021] The heat exchange system, the method and the device for controlling the heat exchange system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0022] The liquid storage tank is arranged in the second refrigerant pipeline, the first bypass pipeline is connected between the first refrigerant pipeline and the liquid storage tank, and the first valve is arranged in the first bypass pipeline. In this way, when the first valve is opened, the refrigerant flowing out of the first end of the four-way reversing valve can flow into the liquid storage tank through the first refrigerant pipeline and the first bypass pipeline. The indoor heat exchanger comprises the first heat exchanger and the second heat exchanger connected in series, and the second throttling device is arranged between the first heat exchanger and the second heat exchanger. In this way, when the heat exchange system needs to dehumidify, the first valve can be opened, the first throttling device is in a non-throttling state, and the second throttling device is in a working throttling state. Since the heat exchange pipeline in the outdoor heat exchanger is relatively long and generally arranged in a disc shape, the flow resistance of the refrigerant in the outdoor heat exchanger is relatively large. When the first valve is opened, the first bypass pipeline connects the first end of the four-way reversing valve and the liquid storage tank, so that the first bypass pipeline is equivalent to short-circuiting the liquid storage tank. The refrigerant can not pass through the outdoor heat exchanger, and after flowing out of the first end of the four-way reversing valve, the refrigerant flows into the first heat exchanger through the first valve, the liquid storage tank and the first throttling device. At this time, the first heat exchanger can provide heat to the indoor as a condenser, and the refrigerant flows into the second heat exchanger through the second throttling device after flowing out of the first heat exchanger, and then flows back to the compressor through the four-way reversing valve to complete a refrigerant circulation. At this time, the second heat exchanger can provide cold to the indoor as an evaporator to dehumidify the indoor through the second heat exchanger, and the first heat exchanger is also arranged in the indoor to provide heat to the indoor. In this way, the temperature in the indoor can be improved in the dehumidifying process, thereby realizing constant-temperature dehumidification or temperature-increasing dehumidification to reduce the discomfort of users in the dehumidifying process and improve the use experience of the users. In this embodiment, the refrigerant is not condensed and releases heat in the outdoor heat exchanger. In this way, the refrigerant has more heat in the first heat exchanger, thereby improving the heating efficiency of the indoor, improving the body temperature of the user and improving the experience of the user. In the heating process, when the outdoor temperature is relatively low, the compressor needs to be supplemented with air. At this time, the first valve can be opened, and the first throttling device is in a working throttling state and the second throttling device is in a non-throttling state. In this way, the refrigerant is condensed and releases heat in the first heat exchanger and the second heat exchanger, and the refrigerant flows to the liquid storage tank after being throttled in the first throttling device. The gaseous refrigerant can flow to the first end of the four-way reversing valve through the first bypass pipeline and the first valve, thereby flowing to the air inlet of the compressor. In this way, the compressor can be supplemented with air and heat when the outdoor temperature is relatively low, thereby improving the heating capacity of the compressor. The liquid refrigerant in the liquid storage tank flows to the outdoor heat exchanger through the second valve, and then flows back to the compressor through the first refrigerant pipeline and the four-way reversing valve. In this embodiment, the opening degree and the maintaining time of the first valve can be controlled to adjust the content of the gaseous refrigerant in the liquid storage tank, thereby adjusting the amount of refrigerant temporarily stored in the liquid storage tank, adjusting the amount of refrigerant participating in the heat exchange circulation, improving the rationality of the actual refrigerant circulating in the heat exchange system under different working conditions, improving the performance of the refrigeration system, and thereby improving the energy efficiency of the heat exchange system.

[0023] Therefore, the embodiment can realize constant temperature, temperature rising dehumidification, compressor air supplementing enthalpy increasing, and adjusting refrigerant circulation amount and other functions by controlling the opening and closing of the first valve and the working state of the first throttling device and the second throttling device in the heat exchange system, and reduces the structure of the heat exchange system and the production cost of the heat exchange system.

[0024] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and are not intended to be limiting of the embodiments, in which like reference numerals denote like elements in the figures, and in which:

[0026] Figure 1 is a structural schematic diagram of a heat exchange system provided by an embodiment of the present disclosure;

[0027] Figure 2 is a structural schematic diagram of another heat exchange system provided by an embodiment of the present disclosure;

[0028] Figure 3 is a structural schematic diagram of another heat exchange system provided by an embodiment of the present disclosure;

[0029] Figure 4 is a structural schematic diagram of another heat exchange system provided by an embodiment of the present disclosure;

[0030] Figure 5 is a schematic diagram of a method for controlling a heat exchange system provided by an embodiment of the present disclosure;

[0031] Figure 6 is a schematic diagram of another method for controlling a heat exchange system provided by an embodiment of the present disclosure;

[0032] Figure 7 is a schematic diagram of another method for controlling a heat exchange system provided by an embodiment of the present disclosure;

[0033] Figure 8 is a schematic diagram of another method for controlling a heat exchange system provided by an embodiment of the present disclosure;

[0034] Figure 9 is a schematic diagram of a device for controlling a heat exchange system provided by an embodiment of the present disclosure.

[0035] LIST OF REFERENCE NUMERALS

[0036] 100, processor; 101, memory; 102, communication interface; 103, bus; 200, four-way reversing valve; 300, outdoor heat exchanger; 400, first throttling device; 500, indoor heat exchanger; 510, first heat exchanger; 520, second heat exchanger; 530, second throttling device; 540, third throttling device; 600, liquid storage tank; 610, first bypass pipeline; 620, first valve; 700, compressor; 710, first refrigerant pipeline; 720, second refrigerant pipeline. DETAILED DESCRIPTION

[0037] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are only used for reference and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0038] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0039] Unless otherwise specified, the term "a plurality of" means two or more.

[0040] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the preceding and following objects. For example, A / B represents: A or B.

[0041] The term "and / or" is a description of the association relationship between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0042] The term "corresponding" can refer to an association relationship or a binding relationship, A corresponding to B means that there is an association relationship or a binding relationship between A and B.

[0043] As Figures 1 to 4As shown, the heat exchange system provided by the embodiment of the present disclosure comprises a compressor 700, a four-way valve 200, an outdoor heat exchanger 300, a first throttling device 400 and at least one indoor heat exchanger 500 which are sequentially connected by refrigerant pipelines. A first refrigerant pipeline 710 is connected between a first end of the four-way valve 200 and the outdoor heat exchanger 300, and a second refrigerant pipeline 720 is connected between the outdoor heat exchanger 300 and the first throttling device 400.

[0044] In the embodiment, Figure 1 and Figure 2 As shown, the heat exchange system provided by the embodiment of the present disclosure comprises a compressor 700, a four-way valve 200, an outdoor heat exchanger 300, a first throttling device 400 and at least one indoor heat exchanger 500 which are sequentially connected by refrigerant pipelines. A first refrigerant pipeline 710 is connected between a first end of the four-way valve 200 and the outdoor heat exchanger 300, and a second refrigerant pipeline 720 is connected between the outdoor heat exchanger 300 and the first throttling device 400. Figure 3 and Figure 4 As shown, the heat exchange system provided by the embodiment of the present disclosure comprises a compressor 700, a four-way valve 200, an outdoor heat exchanger 300, a first throttling device 400 and at least one indoor heat exchanger 500 which are sequentially connected by refrigerant pipelines. A first refrigerant pipeline 710 is connected between a first end of the four-way valve 200 and the outdoor heat exchanger 300, and a second refrigerant pipeline 720 is connected between the outdoor heat exchanger 300 and the first throttling device 400.

[0045] The heat exchange system further comprises a liquid storage tank 600, a first bypass pipeline 610, a first valve 620 and a second throttling device 530. The liquid storage tank 600 is arranged in the second refrigerant pipeline 720. The first bypass pipeline 610 is connected between the first refrigerant pipeline 710 and the liquid storage tank 600. The first valve 620 is arranged in the first bypass pipeline 610. The indoor heat exchanger 500 comprises a first heat exchanger 510 and a second heat exchanger 520 which are connected in series, and the second throttling device 530 is connected between the first heat exchanger 510 and the second heat exchanger 520.

[0046] In the embodiment of the present disclosure, the liquid storage tank 600 is arranged in the second refrigerant pipeline 720, the first bypass pipeline 610 is connected between the first refrigerant pipeline 710 and the liquid storage tank 600, and the first valve 620 is arranged in the first bypass pipeline 610. In this way, when the first valve 620 is opened, the refrigerant flowing out of the first end of the four-way reversing valve 200 can flow into the liquid storage tank 600 through the first refrigerant pipeline 710 and the first bypass pipeline 610. The indoor heat exchanger 500 includes the first heat exchanger 510 and the second heat exchanger 520 connected in series, and the second throttling device 530 is arranged between the first heat exchanger 510 and the second heat exchanger 520. In this way, when the heat exchange system needs to dehumidify, the first valve 620 can be opened, and the first throttling device 400 is in a non-throttling state, and the second throttling device 530 is in a working throttling state. Because the heat exchange pipeline in the outdoor heat exchanger 300 is relatively long and generally arranged in a disc shape, the flow resistance of the refrigerant in the outdoor heat exchanger 300 is relatively large. When the first valve 620 is opened, the first bypass pipeline 610 connects the first end of the four-way reversing valve 200 and the liquid storage tank 600, so that the first bypass pipeline 610 is equivalent to short-circuiting the liquid storage tank 600. The refrigerant can not pass through the outdoor heat exchanger 300, and the refrigerant flows into the first heat exchanger 510 through the first valve 620, the liquid storage tank 600 and the first throttling device 400 after flowing out of the first end of the four-way reversing valve 200. At this time, the first heat exchanger 510 can provide heat to the indoor as a condenser, and the refrigerant flows into the second heat exchanger 520 after throttling by the second throttling device 530 after flowing out of the first heat exchanger 510, and flows back to the compressor 700 through the four-way reversing valve 200 to complete a refrigerant cycle. At this time, the second heat exchanger 520 can provide cold to the indoor as an evaporator to dehumidify the indoor through the second heat exchanger 520, and the first heat exchanger 510 is also arranged in the indoor to provide heat to the indoor. In this way, the temperature in the indoor can be increased in the dehumidification process, so as to realize constant-temperature dehumidification or temperature-increasing dehumidification, so as to reduce the discomfort of the user in the dehumidification process and improve the use experience of the user. In addition, in the embodiment, the refrigerant is not condensed and releases heat in the outdoor heat exchanger, so that the refrigerant has more heat when in the first heat exchanger 510, thereby improving the heating efficiency of the indoor, improving the body temperature of the user, and improving the experience of the user.

[0047] In the heating process, when the outdoor temperature is low, the compressor 700 needs to be supplemented with air, at this time, the first valve 620 can be opened, and the first throttling device 400 is in the working throttling state, and the second throttling device 530 is in the state of communication without throttling. In this way, the refrigerant is condensed and released heat in the first heat exchanger 510 and the second heat exchanger 520, and the refrigerant flows to the liquid accumulator 600 after throttling in the first throttling device 400. The gaseous refrigerant can flow to the first end of the four-way reversing valve 200 through the first bypass pipeline 610 and the first valve 620, and then flow to the gas inlet of the compressor 700, so that the gaseous refrigerant can supplement the air to the compressor 700 and increase the enthalpy when the outdoor temperature is low, thereby improving the heating capacity of the compressor 700. The liquid refrigerant in the liquid accumulator 600 flows to the outdoor heat exchanger 300 through the second valve 630, and then flows back to the compressor 700 through the first refrigerant pipeline 710 and the four-way reversing valve 200.

[0048] In addition, in the embodiment, the amount of gaseous refrigerant in the liquid accumulator 600 can be adjusted by controlling the opening size and maintenance time of the first valve 620, so as to adjust the amount of refrigerant temporarily stored in the liquid accumulator 600, thereby adjusting the amount of refrigerant participating in the heat exchange cycle, improving the rationality of the actual refrigerant circulating in the heat exchange system under different working conditions, and improving the performance of the refrigeration system, thereby improving the energy efficiency of the heat exchange system.

[0049] Therefore, by controlling the opening and closing of the first valve 620 and the working state of the first throttling device 400 and the second throttling device 530 in the heat exchange system, the embodiment can realize constant temperature, temperature rise dehumidification, compressor 700 air supplement and enthalpy increase, and refrigerant circulation adjustment and other functions, and reduce the structure of the heat exchange system and the production cost of the heat exchange system.

[0050] Exemplarily, the operation modes of the heat exchange system can include constant temperature dehumidification mode, first heating mode, second heating mode, third heating mode, fourth heating mode, refrigeration liquid storage mode, and refrigeration liquid discharge mode.

[0051] In the case that the operation mode of the heat exchange system is the constant temperature dehumidification mode, the temperature in the room can be relatively low, and the humidity in the room can be relatively high, and the heat exchange system needs to dehumidify or heat at a constant temperature. In the case that the mode of the heat exchange system is the first heating mode, the outdoor temperature can be extremely low and the frequency of the compressor 700 can be relatively large (for example, the first outdoor temperature is less than or equal to the first preset temperature, and the frequency of the compressor 700 is greater than or equal to the preset frequency), and the heat exchange system needs to supply more gas to the compressor 700 to increase the heating capacity of the compressor 700, and increase the amount of refrigerant participating in the heat exchange cycle. In the case that the heat exchange system is in the second heating mode, the outdoor temperature can be extremely low and the frequency of the compressor 700 can be small (for example, the first outdoor temperature is less than or equal to the first preset temperature, and the frequency of the compressor 700 is less than the preset frequency), and the heat exchange system needs to supply more gas to the compressor 700 to increase the heating capacity of the compressor 700, and reduce the amount of refrigerant participating in the heat exchange cycle. In the case that the heat exchange system is in the third heating mode, the outdoor temperature can be relatively low and the frequency of the compressor 700 can be relatively large (for example, the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the frequency of the compressor 700 is greater than or equal to the preset frequency), and the heat exchange system needs to supply less gas to the compressor 700 to increase the heating capacity of the compressor 700, and increase the amount of refrigerant participating in the heat exchange cycle. In the case that the heat exchange system is in the fourth heating mode, the outdoor temperature can be relatively low and the frequency of the compressor 700 can be small (for example, the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the frequency of the compressor 700 is less than the preset frequency), and the heat exchange system needs to supply less gas to the compressor 700 to increase the heating capacity of the compressor 700, and reduce the amount of refrigerant participating in the heat exchange cycle.

[0052] In the case that the heat exchange system is in the refrigeration storage mode, the outdoor temperature can be relatively low (for example, the second outdoor temperature is less than or equal to the third preset temperature), and the heat exchange system needs to reduce the amount of refrigerant participating in the heat exchange cycle. Since the refrigeration storage mode is generally operated in summer, and the first, second, third and fourth heating modes are generally operated in winter, although the outdoor temperature is relatively low in the refrigeration storage mode, the outdoor temperature at this time is also much higher than the outdoor temperature in the heating mode, that is, the third preset temperature is also greater than the second preset temperature and the first preset temperature. In the case that the heat exchange system is in the refrigeration storage mode, the outdoor temperature can be relatively high (for example, the second outdoor temperature is greater than the third preset temperature), and the heat exchange system needs to increase the amount of refrigerant participating in the heat exchange cycle.

[0053] Further, for different operation modes of the above heat exchange system, by controlling the opening size and maintaining time of the first valve 620, the amount of refrigerant temporarily stored in the storage tank 600 can be adjusted, which can be the following multiple cases.

[0054] Optionally, when the operation mode of the heat exchange system is the second heating mode, the first valve 620 is opened to the first opening degree, the first throttling device 400 works in throttling, and the second throttling device 530 is connected without throttling.

[0055] In this embodiment, when the heat exchange system is in heating operation, the refrigerant flows out of the compressor 700 and the four-way reversing valve 200, and then flows into the indoor heat exchanger 500. The second throttling device 530 is connected without throttling. After the refrigerant is condensed and releases heat in the first heat exchanger 510 and the second heat exchanger 520, the refrigerant flows to the first throttling device 400. The first throttling device 400 works in throttling. The refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the liquid accumulator 600. The first valve 620 is opened to the first opening degree. In this way, the compressor 700 sucks through the first bypass pipeline 610 provided with the first valve 620. The compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610, so that the gaseous refrigerant enters the compressor 700. At this time, the gaseous refrigerant in the liquid accumulator 600 decreases, and the pressure in the liquid accumulator 600 decreases, so that the liquid refrigerant in the liquid accumulator 600 increases. In this way, the liquid accumulator 600 can store liquid refrigerant to reduce the amount of refrigerant participating in the heat exchange cycle. The embodiment of the present disclosure can supplement the gas to the compressor 700 while reducing the amount of refrigerant participating in the heat exchange cycle, thereby increasing the function of the heat exchange system.

[0056] Optionally, when the operation mode of the heat exchange system is the first heating mode, the first valve 620 is closed after being operated at the first opening degree for a first preset time length, the first throttling device 400 works in throttling, and the second throttling device 530 is connected without throttling.

[0057] In the embodiment, when the heat exchange system is in the heating operation, the refrigerant flows into the indoor heat exchanger 500 from the outlet of the compressor 700 and the four-way valve 200, the second throttling device 530 is connected without throttling, and the refrigerant flows to the first throttling device 400 after being condensed and releasing heat in the first heat exchanger 510 and the second heat exchanger 520. The first throttling device 400 works in throttling, and the refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the liquid accumulator 600. The first valve 620 is opened to the first opening degree, so that the compressor 700 sucks through the first bypass pipeline 610 provided with the first valve 620, and the compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610 to make the gaseous refrigerant enter the compressor 700. In the process of the gaseous refrigerant entering the liquid accumulator 600, the refrigerant stored in the liquid accumulator 600 gradually increases. The first valve 620 is closed after operating at the first opening degree for a first time length, and the gaseous refrigerant in the liquid accumulator 600 increases and the liquid refrigerant decreases after the first valve 620 is closed. When the heat exchange system needs more refrigerant participating in the circulation, the situation of the liquid accumulator 600 storing more refrigerant for a long time is reduced, so as to increase the amount of refrigerant participating in the heat exchange circulation. In this way, the amount of gas supplement of the compressor 700 and the amount of refrigerant participating in the heat exchange circulation can be balanced, which is equivalent to supplementing the compressor 700 while increasing the amount of refrigerant participating in the heat exchange circulation, thereby improving the heating effect of the heat exchange system. In the embodiment, when the liquid accumulator 600 supplements the compressor 700 through the first valve 620 and the first bypass pipeline 610, the heating capacity of the compressor 700 is improved, so as to improve the heating capacity of the indoor heat exchanger 500. At this time, the operating frequency of the compressor 700 can be reduced, so that better heating effect can be achieved when supplementing gas. Further, the first valve 620 is periodically opened and closed, and in one cycle, the first valve 620 is closed after operating at the first opening degree for a first preset time, and in the next cycle, the first valve 620 continues to operate at the first opening degree for a first preset time and then is closed.

[0058] Optionally, when the operating mode of the heat exchange system is the third heating mode, the first valve 620 is closed after operating at the second opening degree for a second preset time length, the first throttling device 400 works in throttling, and the second throttling device 530 is connected without throttling.

[0059] In the embodiment, when the heat exchange system is in the heating operation, the refrigerant flows out from the compressor 700 and the four-way valve 200, and then flows into the indoor heat exchanger 500. The second throttling device 530 is in communication without throttling. The refrigerant flows to the first throttling device 400 after being condensed and releasing heat in the first heat exchanger 510 and the second heat exchanger 520. The first throttling device 400 works in throttling. The refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the liquid accumulator 600. The first valve 620 is opened to the second opening degree. In this way, the compressor 700 sucks air through the first bypass pipeline 610 provided with the first valve 620. The compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610 to make the gaseous refrigerant enter the compressor 700. In the process of the gaseous refrigerant entering the liquid accumulator 600, the refrigerant stored in the liquid accumulator 600 gradually increases. The second opening degree is smaller than the first opening degree. The liquid accumulator 600 supplies less gas to the compressor 700. At this time, the outdoor temperature is in a lower state. The smaller amount of gas supply can meet the demand of the compressor 700. Alternatively, the opening degree of the first valve 620 is negatively correlated with the outdoor temperature. That is, when the heat exchange system is in the heating mode, the lower the outdoor temperature, the more the amount of gas supply from the liquid accumulator 600 to the compressor 700. The higher the outdoor temperature, the less the amount of gas supply from the liquid accumulator 600 to the compressor 700. In this way, the amount of gas supply to the compressor 700 is increased when the first outdoor temperature is low, and the heating capacity of the compressor 700 is improved.

[0060] After the first valve 620 operates at the second opening degree for the second time length, the first valve 620 is closed. When the first valve 620 is closed, the gaseous refrigerant in the liquid accumulator 600 increases, and the liquid refrigerant decreases, so as to reduce the long-term storage of a large amount of refrigerant in the liquid accumulator 600 when the heat exchange system needs a large amount of refrigerant participating in the circulation, thereby increasing the amount of refrigerant participating in the heat exchange circulation. In this way, the amount of gas supply to the compressor 700 and the amount of refrigerant participating in the heat exchange circulation can be balanced. It is equivalent to increasing the amount of refrigerant participating in the heat exchange circulation while supplementing the compressor 700, thereby improving the heating effect of the heat exchange system. Furthermore, in the embodiment, when the liquid accumulator 600 supplies gas to the compressor 700 through the first valve 620 and the bypass pipeline, the heating capacity of the compressor 700 is improved, so as to improve the heating capacity of the indoor heat exchanger 500. At this time, the operating frequency of the compressor 700 can be reduced. In this way, the better heating effect can also be achieved when the gas is supplied. Further, the first valve 620 is periodically opened and closed. In one cycle, the first valve 620 is closed after operating at the second opening degree for the second predetermined time. In the next cycle, the first valve 620 continues to operate at the second opening degree for the second predetermined time and then is closed.

[0061] Optionally, the second preset time is less than the first preset time, the amount of gas supplement to the compressor 700 in the third heating mode is less than the amount of gas supplement to the compressor 700 in the first mode, and the gas supplement time to the compressor 700 in the third heating mode is shorter, so that the amount of gas supplement to the compressor 700 can be reduced, and the amount of gas discharged from the liquid accumulator 600 can also be reduced, so as to increase the amount of refrigerant participating in the heat exchange cycle, thereby increasing the function of the heat exchange system.

[0062] Optionally, in the case where the operation mode of the heat exchange system is the fourth heating mode, the first valve 620 is opened to the second opening degree, the first throttling device 400 works in throttling, and the second throttling device 530 is connected without throttling.

[0063] In this embodiment, when the heat exchange system is in heating operation, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the indoor heat exchanger 500. The second throttling device 530 is connected without throttling. The refrigerant flows to the first throttling device 400 after being condensed and releasing heat in the first heat exchanger 510 and the second heat exchanger 520. The first throttling device 400 works in throttling. The refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant, which flows into the liquid accumulator 600. The first valve 620 is opened to the second opening degree, so that the compressor 700 can suck gas through the first bypass pipeline 610 provided with the first valve 620, and the compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610 to make the gaseous refrigerant enter the compressor 700. In the process of gaseous refrigerant entering the liquid accumulator 600, the refrigerant stored in the liquid accumulator 600 gradually increases. In this way, the liquid accumulator 600 can store liquid refrigerant to reduce the amount of refrigerant participating in the heat exchange cycle and improve the rationality of the heat exchange cycle. The second opening degree is less than the first opening degree, and the amount of gas supplement from the liquid accumulator 600 to the compressor 700 is less. At this time, the outdoor temperature is in a lower state, and the smaller amount of gas supplement can meet the demand of the compressor 700.

[0064] Optionally, in the case where the operation mode is the refrigeration and liquid storage mode, the first valve 620 is closed, the first throttling device 400 works in throttling, and the second throttling device 530 is connected without throttling.

[0065] In the embodiment, when the heat exchange system is in cooling operation, the first valve 620 is closed, i.e. the first bypass pipeline 610 is disconnected, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the outdoor heat exchanger 300, and after heat release in the outdoor heat exchanger 300, flows to the liquid accumulator 600. The refrigerant flows through the liquid accumulator 600 and is throttled in the first throttling device 400. The second throttling device 530 is connected and not throttled, so that the refrigerant evaporates and absorbs heat in the first heat exchanger 510 and the second heat exchanger 520, so as to reduce the indoor temperature. Since the first valve 620 is closed, the refrigerant can fill the liquid accumulator 600 after flowing into the liquid accumulator 600, so that the liquid accumulator 600 can store the refrigerant, and the amount of refrigerant participating in the heat exchange cycle is reduced. When the outdoor temperature is lower, i.e. the temperature difference between the outdoor temperature and the user's suitable temperature is smaller, the cooling capacity of the heat exchange system is smaller, and the amount of refrigerant required to participate in the heat exchange cycle is smaller. In this way, the rationality of the amount of refrigerant participating in the heat exchange cycle in the heat exchange system is improved, and the energy efficiency of the heat exchange system is improved.

[0066] Optionally, when the operation mode is the cooling liquid discharge mode, the first valve 620 is opened to the fourth opening degree, the first throttling device 400 is throttled, and the second throttling device 530 is connected and not throttled.

[0067] In the embodiment, when the heat exchange system is in cooling operation, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the outdoor heat exchanger 300, and after heat release in the outdoor heat exchanger 300, flows to the liquid accumulator 600. The refrigerant flows through the liquid accumulator 600 and is throttled in the first throttling device 400. The second throttling device 530 is connected and not throttled, so that the refrigerant evaporates and absorbs heat in the first heat exchanger 510 and the second heat exchanger 520, so as to reduce the indoor temperature. The first valve 620 is opened to the fourth opening degree, and the first bypass pipeline 610 is connected to the first refrigerant pipeline 710 and the liquid accumulator 600. A part of the high-pressure refrigerant flowing out of the four-way valve 200 can flow into the liquid accumulator 600 through the first bypass pipeline 610, and another part of the high-pressure refrigerant flowing out of the four-way valve 200 can flow into the liquid accumulator 600 after heat release in the outdoor heat exchanger 300. Further, the fourth opening degree of the first valve 620 is small, and the resistance of the fourth opening degree to the refrigerant is greater than or equal to the resistance of the outdoor heat exchanger 300 to the refrigerant, so that the refrigerant can flow through the first valve 620 and the outdoor heat exchanger 300, respectively. Since the refrigerant flowing into the liquid accumulator 600 through the first bypass pipeline 610 is high-pressure refrigerant, the refrigerant stored in the liquid accumulator 600 flows out of the liquid accumulator 600 through the second refrigerant pipeline 720, so as to increase the amount of refrigerant participating in the heat exchange cycle. When the outdoor temperature is higher, i.e. the temperature difference between the outdoor temperature and the user's suitable temperature is larger, the cooling capacity of the heat exchange system is larger, and the amount of refrigerant required to participate in the heat exchange cycle is larger. In this way, the rationality of the amount of refrigerant participating in the heat exchange cycle in the heat exchange system is improved, and the energy efficiency of the heat exchange system is improved.

[0068] In the case that the operation mode of the heat exchange system is the constant temperature dehumidification mode, the first valve 620 is opened to the third opening degree, the first throttling device 400 is connected without throttling, and the second throttling device 530 works in the throttling mode.

[0069] In the embodiment, the flow resistance of the refrigerant in the outdoor heat exchanger 300 is large because the heat exchange pipeline in the outdoor heat exchanger 300 is long and generally arranged in a disc shape. After the first valve 620 is opened to the third opening degree, the first bypass pipeline 610 connects the first end of the four-way reversing valve 200 and the liquid accumulator 600, so that the first bypass pipeline 610 is equivalent to short-circuiting the liquid accumulator 600. The refrigerant can flow into the first heat exchanger 510 without passing through the outdoor heat exchanger 300. The refrigerant flows out of the first end of the four-way reversing valve 200, passes through the first valve 620, the liquid accumulator 600 and the first throttling device 400, and then flows into the first heat exchanger 510. At this time, the first heat exchanger 510 can provide heat to the indoor as a condenser. The refrigerant flows out of the first heat exchanger 510, throttles through the second throttling device 530, and then flows into the second heat exchanger 520. The refrigerant flows out of the second heat exchanger 520, passes through the four-way reversing valve 200, and then flows back to the compressor 700 to complete a refrigerant cycle. At this time, the second heat exchanger 520 can provide cold to the indoor as an evaporator to dehumidify the indoor through the second heat exchanger 520. The first heat exchanger 510 is also arranged in the indoor and can provide heat to the indoor. In this way, the temperature in the indoor can be increased in the dehumidification process, so as to realize constant temperature dehumidification or temperature increasing dehumidification, thereby reducing the discomfort of the user in the dehumidification process and improving the use experience of the user. Further, the opening degree of the third valve is greater than the opening degree of the fourth valve.

[0070] In some optional embodiments, the first valve 620 includes a third electronic expansion valve.

[0071] In the embodiment, the first valve 620 includes a third electronic expansion valve, so that different operation modes of the heat exchange system can be realized by changing the opening degree of the first valve 620. For example, in the case that the heat exchange system is in the heating operation mode, the opening degree of the first valve 620 can be changed to increase the amount of gas supplement of the liquid accumulator 600 to the compressor 700 to change the operation mode of the heat exchange system. In addition, the structure of the heat exchange system is simple, and the production cost of the heat exchange system is reduced.

[0072] Optionally, the second throttling device 530 includes a second electronic expansion valve.

[0073] In the embodiment, the second throttling device 530 comprises a second electronic expansion valve, so that the second throttling device 530 can work in throttling or non-throttling by changing the opening size of the second throttling device 530. For example, the second throttling device 530 works in throttling in the constant temperature dehumidification mode, and works in non-throttling in the refrigeration or heating operation, so as to realize different operation modes of the heat exchange system, and the structure of the heat exchange system is simple, and the production cost of the heat exchange system is reduced.

[0074] Optionally, the first throttling device 400 comprises a first electronic expansion valve.

[0075] In the embodiment, the first throttling device 400 comprises a first electronic expansion valve, so that the first throttling device 400 can work in throttling or non-throttling by changing the opening size of the first throttling device 400. For example, the first throttling device 400 works in non-throttling in the constant temperature dehumidification mode, and works in throttling in the refrigeration or heating operation, so as to realize different operation modes of the heat exchange system, and the structure of the heat exchange system is simple, and the production cost of the heat exchange system is reduced.

[0076] Further, the first throttling device 400 further comprises a second bypass pipeline and a second valve. The second bypass pipeline is connected in parallel with the first electronic expansion valve between the second refrigerant pipeline 720 and the indoor heat exchanger 500, and the second valve is arranged in the second bypass pipeline.

[0077] Optionally, the second valve comprises a first electromagnetic valve.

[0078] In the embodiment, the second bypass pipeline is connected in parallel with the first electronic expansion valve between the second refrigerant pipeline 720 and the indoor heat exchanger 500, and the second valve is arranged in the second bypass pipeline. The first throttling device 400 comprises a throttling state and a non-throttling state. In the throttling state, the second valve is closed, so that the second bypass pipeline is disconnected, and the refrigerant flows through the first electronic expansion valve when flowing in the first throttling device 400, and the refrigerant is throttled in the first electronic expansion valve. In the non-throttling state, the second valve is opened, the second bypass pipeline connects the second refrigerant pipeline 720 and the indoor heat exchanger 500, and the first electronic expansion valve is in the throttling state, and the flow resistance of the first electronic expansion valve to the refrigerant is large. At this time, the refrigerant flows through the second bypass pipeline when flowing in the first throttling device 400, and the second bypass pipeline is equivalent to short-circuiting the first electronic expansion valve. In this way, when the operation mode of the heat exchange system is the constant temperature dehumidification mode, the first valve 620 is opened, the first throttling device 400 is in non-throttling, and the second throttling device 530 is in throttling, so that the case that the high-pressure gaseous refrigerant discharged by the compressor 700 flows into the first electronic expansion valve after flowing through the liquid accumulator 600 can be reduced, thereby reducing the noise generated by the high-pressure gaseous refrigerant when flowing through the first electronic expansion valve, and improving the user experience.

[0079] In some optional embodiments, as shown in Figure 2 and Figure 4 The number of indoor heat exchangers 500 is multiple, and the multiple indoor heat exchangers 500 in parallel are located between the second end of the four-way valve 200 and the first throttling device 400.

[0080] In this embodiment, the heat exchange system is connected in parallel with multiple indoor heat exchangers 500, and the multiple indoor heat exchangers 500 can all refrigerate, heat and dehumidify. Further, different numbers of indoor heat exchangers 500 can be turned on or off according to the needs to meet the different needs of users.

[0081] Further, the indoor heat exchanger 500 further comprises a third throttling device 540, which is connected between the first throttling device 400 and the first heat exchanger 510, and the third throttling device 540 can work throttling or be connected without throttling.

[0082] In this embodiment, when the indoor heat exchanger 500 is multiple, each indoor heat exchanger 500 is provided with a third throttling device 540, which is connected between the first throttling device 400 and the first heat exchanger 510. In this way, when the operating mode of the heat exchange system is the refrigeration liquid storage mode or the refrigeration liquid discharge mode, the third throttling device 540 can also throttle the refrigerant flowing into the corresponding first heat exchanger 510 and second heat exchanger 520, improve the accuracy of control of multiple indoor heat exchangers 500, and improve the heat exchange effect of the indoor heat exchanger 500.

[0083] The third throttling device 540 can work throttling or be connected without throttling. When the operating mode of the heat exchange system is the constant temperature dehumidification mode, the third throttling device 540 is connected without throttling, so that the high-pressure gaseous refrigerant discharged by the compressor 700 can flow into the first heat exchanger 510, condense and release heat in the first heat exchanger 510, to increase the indoor temperature during dehumidification and improve the user experience. When the heat exchange system is in the refrigeration liquid storage mode, the refrigeration liquid discharge mode, the first, second, third or fourth heating mode, the third throttling device 540 works throttling to improve the accuracy of control of multiple indoor heat exchangers 500 and improve the heat exchange effect of the indoor heat exchanger 500.

[0084] Optionally, the third throttling device 540 comprises a fourth electronic expansion valve.

[0085] In the embodiment, the third throttling device 540 comprises a fourth electronic expansion valve, so that the third throttling device 540 can work in throttling or non-throttling by changing the opening size of the third throttling device 540. For example, the third throttling device 540 is in non-throttling in the constant temperature dehumidification mode, and works in throttling in the refrigeration or heating operation, so as to realize different operation modes of the heat exchange system, and the structure of the heat exchange system is simple, and the production cost of the heat exchange system is reduced.

[0086] Further, the third throttling device 540 further comprises a third bypass pipeline and a third valve. The third bypass pipeline is connected in parallel with the fourth electronic expansion valve between the first throttling device 400 and the first heat exchanger 510, and the third valve is arranged in the third bypass pipeline.

[0087] Optionally, the third valve comprises a second electromagnetic valve.

[0088] In the embodiment, the third bypass pipeline is connected in parallel with the fourth electronic expansion valve between the first throttling device 400 and the first heat exchanger 510, and the third valve is arranged in the third bypass pipeline. The third throttling device 540 comprises a throttling state and a non-throttling state. In the throttling state, the third valve is closed, so that the third bypass pipeline is disconnected, and the refrigerant flows through the fourth electronic expansion valve when flowing in the third throttling device 540, and the refrigerant is throttled in the fourth electronic expansion valve. In the non-throttling state, the third valve is opened, the third bypass pipeline connects the first throttling device 400 and the first heat exchanger 510, and the fourth electronic expansion valve is in the throttling state, and the flow resistance of the fourth electronic expansion valve to the refrigerant is large. At this time, the refrigerant flows through the third bypass pipeline when flowing in the third throttling device 540, and the third bypass pipeline is equivalent to short-circuiting the fourth electronic expansion valve. In this way, when the operation mode of the heat exchange system is the constant temperature dehumidification mode, the first throttling device 400 is in non-throttling, the third valve is opened, the third throttling device 540 is in non-throttling, and the second throttling device 530 works in throttling, so that the case that the high-pressure gaseous refrigerant discharged by the compressor 700 flows into the fourth electronic expansion valve after flowing through the liquid storage tank 600 and the first throttling device 400 can be reduced, thereby reducing the noise generated by the high-pressure gaseous refrigerant when flowing through the fourth electronic expansion valve, and improving the user experience.

[0089] Figure 5 is a flowchart of a method for controlling a heat exchange system provided by the embodiment of the present disclosure. The method for controlling the heat exchange system can be executed in a controller of the heat exchange system. The method for controlling the heat exchange system comprises:

[0090] S001, the controller acquires an operation mode of the heat exchange system.

[0091] S002, according to the operation mode, the controller controls the first valve 620, the first throttling device 400 and the second throttling device 530.

[0092] The operation modes of the heat exchange system include but are not limited to a first heating operation mode, a second heating operation mode, a third heating operation mode, a constant temperature dehumidification mode, a refrigeration liquid storage mode and a refrigeration liquid discharge mode.

[0093] In this embodiment, the controller can obtain the operation mode of the heat exchange system, and according to the operation mode, the controller can control the first valve 620, the first throttling device 400 and the second throttling device 530. In this way, the controller can control the first valve 620, the first throttling device 400 and the second throttling device 530 to work differently under different conditions, so as to realize different functions of the heat exchange system, and on the basis of realizing multiple functions, the structure of the heat exchange system can be reduced, and the production cost of the heat exchange system can be reduced.

[0094] Further, in the case where the first throttling device 400 includes a first electronic expansion valve, a second bypass pipeline and a second valve, the second bypass pipeline is connected in parallel with the first electronic expansion valve between the second refrigerant pipeline 720 and the indoor heat exchanger 500, and the second valve is arranged in the second bypass pipeline, the controller controls the first throttling device 400 to work throttling, that is, the controller controls the second valve to be closed, and the controller controls the first throttling device 400 to be connected without throttling, that is, the controller controls the second valve to be opened.

[0095] Further, in the case where the indoor heat exchanger 500 includes a third throttling device 540, the controller controls the working state of the third throttling device 540 to be the same as the throttling state of the first throttling device 400, that is, when the controller controls the first throttling device 400 to work throttling, the controller controls the third throttling device 540 to work throttling, and when the controller controls the first throttling device 400 to be connected without throttling, the controller controls the third throttling device 540 to be connected without throttling.

[0096] Optionally, in the case where the first throttling device 400 includes a fourth electronic expansion valve, a third bypass pipeline and a third valve, the third bypass pipeline is connected in parallel with the fourth electronic expansion valve between the first throttling device 400 and the first heat exchanger 510, and the third valve is arranged in the third bypass pipeline, the controller controls the third throttling device 540 to work throttling, that is, the controller controls the third valve to be closed, and the controller controls the third throttling device 540 to be connected without throttling, that is, the controller controls the third valve to be opened.

[0097] As shown in FIG. 6, the embodiment provides another method for controlling a heat exchange system, which includes: Figure 6

[0098] S011, the controller obtains the indoor temperature and the indoor humidity. ​

[0099] S012, when the indoor temperature is less than or equal to the preset temperature and the indoor humidity is greater than or equal to the preset humidity, the controller determines that the operation mode is the constant-temperature dehumidification mode.

[0100] S013, according to the operation mode, the controller controls the first valve 620, the first throttling device 400 and the second throttling device 530.

[0101] When the indoor temperature is less than or equal to the preset temperature, it means that the indoor temperature is low; when the indoor humidity is greater than or equal to the preset humidity, it means that the indoor humidity is high.

[0102] In this embodiment, the controller can obtain the indoor temperature and the indoor humidity, and determine the relationship between the indoor temperature and the preset temperature and the relationship between the indoor humidity and the preset humidity. When the indoor temperature is less than or equal to the preset temperature and the indoor humidity is greater than or equal to the preset humidity, that is, when the indoor temperature is low and the indoor humidity is high, the constant-temperature dehumidification mode is run, and the controller controls the first valve 620, the first throttling device 400 and the second throttling device 530 to work in the constant-temperature dehumidification mode, so as to reduce the humidity in the room without reducing the indoor temperature, reduce the discomfort of the user caused by the indoor temperature being too low, and improve the user experience.

[0103] Optionally, the preset temperature ranges from 18 degrees to 20 degrees.

[0104] Optionally, the preset humidity ranges from 60% to 80%.

[0105] Further, when the operation mode is the constant-temperature dehumidification mode, the controller controls the first valve 620 to open to the third opening degree, the first throttling device 400 to be connected without throttling, and the second throttling device 530 to work in throttling.

[0106] In the embodiment, the liquid storage tank 600 is arranged in the second refrigerant pipeline 720, the first bypass pipeline 610 is connected between the first refrigerant pipeline 710 and the liquid storage tank 600, and the first valve 620 is arranged in the first bypass pipeline 610. In this way, when the controller controls the first valve 620 to be opened to the third opening degree, the refrigerant flowing out of the first end of the four-way reversing valve 200 can flow into the liquid storage tank 600 through the first refrigerant pipeline 710 and the first bypass pipeline 610. The indoor heat exchanger 500 includes the first heat exchanger 510 and the second heat exchanger 520 connected in series, and the second throttling device 530 is arranged between the first heat exchanger 510 and the second heat exchanger 520. In this way, when the heat exchange system needs to dehumidify, the controller controls the first valve 620 to be opened to the third opening degree, and the controller controls the first throttling device 400 to be in a non-throttling state, and the controller controls the second throttling device 530 to be in a working throttling state. Since the heat exchange pipeline in the outdoor heat exchanger 300 is relatively long and generally arranged in a disc shape, the flow resistance of the refrigerant in the outdoor heat exchanger 300 is relatively large. When the controller controls the first valve 620 to be opened to the third opening degree, the first bypass pipeline 610 connects the first end of the four-way reversing valve 200 and the liquid storage tank 600. In this way, the first bypass pipeline 610 is equivalent to short-circuiting the liquid storage tank 600, and the refrigerant can not pass through the outdoor heat exchanger 300. After the refrigerant flows out of the first end of the four-way reversing valve 200, the refrigerant flows into the first heat exchanger 510 through the first valve 620, the liquid storage tank 600 and the first throttling device 400. At this time, the first heat exchanger 510 can provide heat to the indoor as a condenser. After the refrigerant flows out of the first heat exchanger 510, the refrigerant flows into the second heat exchanger 520 after being throttled by the second throttling device 530, and then flows back to the compressor 700 through the four-way reversing valve 200 to complete a refrigerant cycle. At this time, the second heat exchanger 520 can provide cold to the indoor as an evaporator to dehumidify the indoor through the second heat exchanger 520, and the first heat exchanger 510 is also arranged in the indoor to provide heat to the indoor. In this way, the temperature in the indoor can be increased during dehumidification, thereby realizing constant-temperature dehumidification or temperature-increasing dehumidification to reduce the discomfort of the user caused by the low temperature during dehumidification and improve the use experience of the user. In addition, in the embodiment, the refrigerant is not condensed and releases heat in the outdoor heat exchanger. In this way, the refrigerant has more heat when it is in the first heat exchanger 510, thereby improving the heating efficiency of the indoor, increasing the body temperature of the user, and improving the experience of the user.

[0107] As shown in Figure 7 , the embodiment of the present disclosure provides another method for controlling a heat exchange system, comprising:

[0108] S021, in the case of heating operation of the heat exchange system, the controller acquires the first outdoor temperature and the frequency of the compressor 700.

[0109] S022, in the case that the first outdoor temperature is less than or equal to the first preset temperature and the compressor 700 frequency is greater than or equal to the preset frequency, the controller determines that the operation mode is the first heating mode.

[0110] S023, in the case that the first outdoor temperature is less than or equal to the first preset temperature and the compressor 700 frequency is less than the preset frequency, the controller determines that the operation mode is the second heating mode.

[0111] S024, in the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the compressor 700 frequency is greater than or equal to the preset frequency, the controller determines that the operation mode is the third heating mode.

[0112] S025, in the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the compressor 700 frequency is less than the preset frequency, the controller determines that the operation mode is the fourth heating mode.

[0113] S026, according to the operation mode, the controller controls the first valve 620, the first throttling device 400 and the second throttling device 530.

[0114] In the embodiment, in the case that the first outdoor temperature is less than or equal to the first preset temperature and the compressor 700 frequency is greater than or equal to the preset frequency, that is, the first outdoor temperature is low and the operation frequency of the compressor 700 is large at this time, the controller determines that the operation mode is the first heating mode to supplement the gas and increase the heat of the compressor 700, improve the heating capacity of the compressor 700, and increase the amount of refrigerant participating in the circulation in the heat exchange system to improve the rationality of the amount of refrigerant participating in the circulation.

[0115] Further, in the case that the operation mode is the first heating mode, the controller controls the first valve 620 to run at the first opening degree for a first preset time length and then to be closed, the first throttling device 400 works in throttling, and the second throttling device 530 is connected without throttling. In this embodiment, when the heat exchange system is in heating operation, the refrigerant flows into the indoor heat exchanger 500 from the outlet of the compressor 700 and the four-way valve 200, the controller controls the second throttling device 530 to be connected without throttling, and the refrigerant flows to the first throttling device 400 after being condensed and releasing heat in the first heat exchanger 510 and the second heat exchanger 520. The controller controls the first throttling device 400 to work in throttling, the refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant, and the gas-liquid two-phase refrigerant flows into the liquid storage tank 600. The controller controls the first valve 620 to be opened to the first opening degree, so that the compressor 700 sucks through the first bypass pipeline 610 provided with the first valve 620, and the compressor 700 can apply suction to the liquid storage tank 600 through the first bypass pipeline 610 to make the gaseous refrigerant enter the compressor 700. In the process that the gaseous refrigerant enters the liquid storage tank 600, the refrigerant stored in the liquid storage tank 600 gradually increases. The controller controls the first valve 620 to be closed after running at the first opening degree for a first time length, and the gaseous refrigerant in the liquid storage tank 600 increases and the liquid refrigerant decreases after the first valve 620 is closed. When the heat exchange system needs more refrigerant participating in the circulation, the situation that the liquid storage tank 600 stores more refrigerant for a long time can be reduced, so as to increase the amount of refrigerant participating in the heat exchange circulation. In this way, the gas supplement amount of the compressor 700 and the refrigerant amount participating in the heat exchange circulation can be balanced, which is equivalent to supplementing the compressor 700 while increasing the refrigerant amount participating in the heat exchange circulation, thereby improving the heating effect of the heat exchange system. In this embodiment, when the liquid storage tank 600 supplements the compressor 700 through the first valve 620 and the first bypass pipeline 610, the heating capacity of the compressor 700 increases, so as to increase the heating capacity of the indoor heat exchanger 500. At this time, the operating frequency of the compressor 700 can be reduced, so that better heating effect can be achieved when supplementing the gas.

[0116] In the case that the first outdoor temperature is less than or equal to the first preset temperature and the frequency of the compressor 700 is less than the preset frequency, it is indicated that the first outdoor temperature is low and the operating frequency of the compressor 700 is small. At this time, the controller determines that the operation mode is the second heating mode. The gas supplement and heating of the compressor 700 are performed to increase the heating capacity of the compressor 700 and reduce the refrigerant amount participating in the circulation of the heat exchange system, so as to improve the rationality of the refrigerant amount participating in the circulation.

[0117] Further, in the case that the operation mode is the second heating mode, the controller controls the first valve 620 to open to the first opening degree, the first throttling device 400 to work in throttling, and the second throttling device 530 to be connected without throttling. In this embodiment, when the heat exchange system is in heating operation, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the indoor heat exchanger 500. The controller controls the second throttling device 530 to be connected without throttling, so that the refrigerant condenses and releases heat in the first heat exchanger 510 and the second heat exchanger 520, and then flows to the first throttling device 400. The controller controls the first throttling device 400 to work in throttling, so that the refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant, which flows into the liquid accumulator 600. The controller controls the first valve 620 to open to the first opening degree, so that the compressor 700 sucks through the first bypass pipeline 610 provided with the first valve 620, and the compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610, so that the gaseous refrigerant enters the compressor 700. At this time, the gaseous refrigerant in the liquid accumulator 600 decreases, and the pressure in the liquid accumulator 600 decreases, so that the liquid refrigerant in the liquid accumulator 600 increases. In this way, the liquid accumulator 600 can store liquid refrigerant to reduce the amount of refrigerant participating in the heat exchange cycle. The present embodiment can supplement the gas to the compressor 700 while reducing the amount of refrigerant participating in the heat exchange cycle, thereby increasing the function of the heat exchange system.

[0118] In the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the frequency of the compressor 700 is greater than or equal to the preset frequency, it means that the first outdoor temperature at this time is still low, and the operating frequency of the compressor 700 is large. The controller determines that the operation mode is the third heating mode. The compressor 700 is supplemented with gas to increase the heat (the amount of gas supplemented to the compressor 700 at this time can be less than the amount of gas supplemented to the compressor 700 in the first heating mode), the heat output of the compressor 700 is increased, and the amount of refrigerant participating in the cycle of the heat exchange system is increased, so as to improve the rationality of the amount of refrigerant participating in the cycle.

[0119] In the case that the operation mode is the third heating mode, the controller controls the first valve 620 to operate at the second opening degree for the second preset time length and then to be closed, the first throttling device 400 works in throttling, and the second throttling device 530 is connected and not throttled. The second opening degree is smaller than the first opening degree. In this embodiment, when the heat exchange system is in heating operation, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the indoor heat exchanger 500. The controller controls the second throttling device 530 to be connected and not throttled. The refrigerant condenses and releases heat in the first heat exchanger 510 and the second heat exchanger 520, and then flows to the first throttling device 400. The controller controls the first throttling device 400 to work in throttling. The refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the liquid accumulator 600. The controller controls the first valve 620 to be opened to the second opening degree. In this way, the compressor 700 sucks through the first bypass pipeline 610 provided with the first valve 620. The compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610, so that the gaseous refrigerant enters the compressor 700. In the process that the gaseous refrigerant enters the liquid accumulator 600, the refrigerant stored in the liquid accumulator 600 gradually increases. The second opening degree is smaller than the first opening degree. The liquid accumulator 600 supplies less gas to the compressor 700. At this time, the outdoor temperature is in a lower state. The smaller gas supply can meet the demand of the compressor 700. Alternatively, the opening degree of the first valve 620 is negatively correlated with the outdoor temperature. That is, in the case that the operation mode of the heat exchange system is the heating mode, the lower the outdoor temperature, the greater the opening degree of the first valve 620, and the more the gas supply of the liquid accumulator 600 to the compressor 700. The higher the outdoor temperature, the smaller the opening degree of the first valve 620, and the less the gas supply of the liquid accumulator 600 to the compressor 700. In this way, the gas supply to the compressor 700 is increased when the first outdoor temperature is lower, and the heating capacity of the compressor 700 is improved.

[0120] The first valve 620 is closed after running at the second opening for the second time length. After the first valve 620 is closed, the gaseous refrigerant in the liquid storage tank 600 increases, and the liquid refrigerant decreases, so as to reduce the amount of refrigerant stored in the liquid storage tank 600 for a long time when the heat exchange system needs more refrigerant participating in the circulation, thereby increasing the amount of refrigerant participating in the heat exchange circulation. In this way, the amount of refrigerant participating in the heat exchange circulation and the amount of refrigerant supplementing the compressor 700 can be balanced, which is equivalent to increasing the amount of refrigerant participating in the heat exchange circulation while supplementing the compressor 700, thereby improving the heating effect of the heat exchange system. In addition, in the embodiment, when the liquid storage tank 600 supplements the compressor 700 through the first valve 620 and the bypass pipeline, the heating capacity of the compressor 700 is increased, so as to increase the heating capacity of the indoor heat exchanger 500. At this time, the operating frequency of the compressor 700 can be reduced, so that better heating effect can be achieved when supplementing the gas.

[0121] Optionally, the second preset time is less than the first preset time, the amount of gas supplementing the compressor 700 in the third heating mode is less than the amount of gas supplementing the compressor 700 in the first mode, and the gas supplementing time of the compressor 700 in the third heating mode is shorter. The amount of gas supplementing the compressor 700 can be reduced, and the gas discharged from the liquid storage tank 600 can also be reduced, so as to reduce the refrigerant stored in the liquid storage tank 600, thereby increasing the refrigerant participating in the heat exchange circulation. The embodiment of the present disclosure can not only adjust the amount of gas supplementing the compressor 700, but also adjust the amount of refrigerant participating in the heat exchange circulation, thereby increasing the function of the heat exchange system.

[0122] In the case that the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the frequency of the compressor 700 is less than the preset frequency, it is indicated that the first outdoor temperature at this time is still low although it is increased, and the operating frequency of the compressor 700 is small. The controller determines that the operating mode is the fourth heating mode. The compressor 700 is supplemented and heated (the amount of gas supplementing the compressor 700 at this time can be less than the amount of gas supplementing the compressor 700 in the first heating mode), the heating capacity of the compressor 700 is increased, and the amount of refrigerant participating in the circulation in the heat exchange system is reduced, so as to improve the rationality of the amount of refrigerant participating in the circulation.

[0123] In the case that the operation mode is the fourth heating mode, the controller controls the first valve 620 to open to the second opening degree, the first throttling device 400 works throttling, and the second throttling device 530 is connected without throttling. The second opening degree is less than the first opening degree. In this embodiment, when the heat exchange system is in heating operation, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the indoor heat exchanger 500. The controller controls the second throttling device 530 to be connected without throttling, and the refrigerant flows to the first throttling device 400 after being condensed and releasing heat in the first heat exchanger 510 and the second heat exchanger 520. The controller controls the first throttling device 400 to work throttling, and the refrigerant flowing out of the first throttling device 400 is gas-liquid two-phase refrigerant. The gas-liquid two-phase refrigerant flows into the liquid accumulator 600. The controller controls the first valve 620 to open to the second opening degree, so that the compressor 700 sucks through the first bypass pipeline 610 provided with the first valve 620, and the compressor 700 can apply suction to the liquid accumulator 600 through the first bypass pipeline 610 to make the gaseous refrigerant enter the compressor 700. In the process of the gaseous refrigerant entering the liquid accumulator 600, the refrigerant stored in the liquid accumulator 600 gradually increases. In this way, the liquid accumulator 600 can store liquid refrigerant to reduce the amount of refrigerant participating in the heat exchange cycle and improve the rationality of the heat capacity participating in the heat exchange cycle. The second opening degree is less than the first opening degree, and the amount of gas supplement of the liquid accumulator 600 to the compressor 700 is less. At this time, the outdoor temperature is in a lower state, and the smaller amount of gas supplement can meet the demand of the compressor 700.

[0124] As shown in Figure 8 , the embodiment of the present disclosure provides another method for controlling a heat exchange system, comprising:

[0125] S031, in the case that the heat exchange system is in refrigeration operation, the controller acquires a second outdoor temperature.

[0126] S032, in the case that the second outdoor temperature is less than or equal to a third preset temperature, the controller determines that the operation mode is a refrigeration liquid storage mode.

[0127] S033, in the case that the second outdoor temperature is greater than the third preset temperature, the controller determines that the operation mode is a refrigeration liquid discharge mode.

[0128] S034, according to the operation mode, the controller controls the first valve 620, the first throttling device 400 and the second throttling device 530.

[0129] In the embodiment, when the heat exchange system is in the refrigeration operation, the controller can obtain the second outdoor temperature, and the controller can control the first valve 620, the first throttling device 400 and the second throttling device 530 according to the size of the second outdoor temperature and the third preset temperature, so as to realize the function of the heat exchange system. Further, the third preset temperature is greater than the second preset temperature. The second outdoor temperature is the outdoor temperature when the heat exchange system is in the refrigeration operation, at this time, the outdoor is in summer, and the second outdoor temperature is relatively high; the first outdoor temperature is the outdoor temperature when the heat exchange system is in the heating operation, at this time, the outdoor is in winter, and the first outdoor temperature is relatively low.

[0130] When the second outdoor temperature is less than or equal to the third preset temperature, that is, the second outdoor temperature is relatively low, the temperature difference between the second outdoor temperature and the user suitable temperature is small, and the refrigeration capacity of the heat exchange system is small, the controller determines that the operation mode is the refrigeration liquid storage mode, so as to reduce the amount of refrigerant participating in the heat exchange cycle.

[0131] Further, when the operation mode is the refrigeration liquid storage mode, the controller controls the first valve 620 to be closed, the first throttling device 400 to work in throttling, and the second throttling device 530 to be connected without throttling. In the embodiment, when the heat exchange system is in the refrigeration operation, the first valve 620 is closed, that is, the first bypass pipeline 610 is disconnected, the refrigerant flows out from the compressor 700 and the four-way reversing valve 200, and then flows into the outdoor heat exchanger 300. After being condensed and heat-released in the outdoor heat exchanger 300, the refrigerant flows to the liquid storage tank 600. After flowing through the liquid storage tank 600, the refrigerant is throttled in the first throttling device 400. The controller controls the second throttling device 530 to be connected without throttling, so that the refrigerant evaporates and absorbs heat in the first heat exchanger 510 and the second heat exchanger 520, so as to reduce the indoor temperature. Since the controller controls the first valve 620 to be closed, the refrigerant can fill the liquid storage tank 600 after flowing into the liquid storage tank 600, so that the liquid storage tank 600 can store the refrigerant, and the amount of refrigerant participating in the heat exchange cycle is reduced. When the outdoor temperature is lower, that is, the temperature difference between the outdoor temperature and the user suitable temperature is smaller, the refrigeration capacity of the heat exchange system is smaller, and the amount of refrigerant participating in the heat exchange cycle is smaller. In this way, the rationality of the amount of refrigerant participating in the heat exchange cycle in the heat exchange system is improved, and the energy efficiency of the heat exchange system is improved.

[0132] When the second outdoor temperature is greater than the third preset temperature, that is, the second outdoor temperature is relatively high, the temperature difference between the second outdoor temperature and the user suitable temperature is large, and the refrigeration capacity of the heat exchange system is large, the controller determines that the operation mode is the refrigeration liquid discharge mode, so as to increase the amount of refrigerant participating in the heat exchange cycle.

[0133] Further, in the case that the operation mode is the refrigeration and liquid discharge mode, the controller controls the first valve 620 to open to the fourth opening degree, the first throttling device 400 to work in throttling, and the second throttling device 530 to be connected without throttling. In this embodiment, when the heat exchange system is in refrigeration, the refrigerant flows out of the compressor 700 and the four-way valve 200, and then flows into the outdoor heat exchanger 300, and is condensed and discharged in the outdoor heat exchanger 300. The refrigerant flows through the liquid accumulator 600 and is throttled in the first throttling device 400. The controller controls the second throttling device 530 to be connected without throttling, so that the refrigerant is evaporated and absorbs heat in the first heat exchanger 510 and the second heat exchanger 520, so as to reduce the indoor temperature. The controller controls the first valve 620 to open to the fourth opening degree, and the first bypass pipeline 610 is connected to the first refrigerant pipeline 710 and the liquid accumulator 600. A part of the high-pressure refrigerant flowing out of the four-way valve 200 can flow into the liquid accumulator 600 through the first bypass pipeline 610, and another part of the high-pressure refrigerant flowing out of the four-way valve 200 can flow into the liquid accumulator 600 after being discharged in the outdoor heat exchanger 300. Further, the fourth opening degree of the first valve 620 is small, and the resistance of the fourth opening degree to the refrigerant is greater than or equal to the resistance of the outdoor heat exchanger 300 to the refrigerant, so that the refrigerant can flow through the first valve 620 and the outdoor heat exchanger 300, respectively. Since the refrigerant flowing into the liquid accumulator 600 through the first bypass pipeline 610 is high-pressure refrigerant, the refrigerant stored in the liquid accumulator 600 flows out of the liquid accumulator 600 through the second refrigerant pipeline 720, so as to increase the amount of refrigerant participating in the heat exchange cycle. When the outdoor temperature is higher, that is, the temperature difference between the outdoor temperature and the user's suitable temperature is greater, the refrigeration capacity of the heat exchange system is greater, and the amount of refrigerant participating in the heat exchange cycle is greater. In this way, the rationality of increasing the amount of refrigerant participating in the heat exchange cycle in the heat exchange system is improved, and the energy efficiency of the heat exchange system is improved.

[0134] The embodiment of the present disclosure provides a device 200 for controlling a heat exchange system, comprising an acquisition module 21 and a control module 22. The acquisition module 21 is configured to acquire an operation mode of the heat exchange system; and the control module 22 is configured to control a first valve 620, a first throttling device 400 and a second throttling device 530 according to the operation mode.

[0135] The device for controlling a heat exchange system provided by the embodiment of the present disclosure is beneficial to controlling the first valve 620, the first throttling device 400 and the second throttling device 530 to work differently in different cases, realizing different functions of the heat exchange system, and reducing the structure of the heat exchange system and the production cost of the heat exchange system on the basis of realizing multiple functions.

[0136] In combination with Figure 9As shown, the embodiment of the present disclosure provides a device for controlling a heat exchange system, which comprises a processor 100 and a memory 101. Optionally, the device can further comprise a communication interface 102 and a bus 103. The processor 100, the communication interface 102 and the memory 101 can communicate with each other through the bus 103. The communication interface 102 can be used for information transmission. The processor 100 can invoke the logical instructions in the memory 101 to execute the method for controlling the heat exchange system in the above-mentioned embodiment.

[0137] In addition, the logical instructions in the memory 101 described above can be realized in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer readable storage medium.

[0138] The memory 101 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 100 executes the program instructions / modules stored in the memory 101, thereby performing functional applications and data processing, i.e. realizing the method for controlling the heat exchange system in the above-mentioned embodiment.

[0139] The memory 101 can include a program storage area and a data storage area. The program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 101 can include a high-speed random access memory and can also include a non-volatile memory.

[0140] The embodiment of the present disclosure provides a heat exchange system, which comprises the device for controlling the heat exchange system described above. The device for controlling the heat exchange system is installed in the heat exchange system. The installation relationship described herein is not limited to placing in the heat exchange system, but also includes installation connection with other components of the heat exchange system, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the device for controlling the heat exchange system can be adapted to a feasible heat exchange system, and thus realize other feasible embodiments.

[0141] The embodiment of the present disclosure provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are set to execute the method for controlling the heat exchange system.

[0142] The computer readable storage medium described above can be a transitory computer readable storage medium or a non-transitory computer readable storage medium.

[0143] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method disclosed in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, and can also be a transitory storage medium.

[0144] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural, logical, electrical, process, and other changes. The embodiments represent only a few of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included in or replace parts and features of other embodiments. Also, the words used in this application are used only to describe the embodiments and not to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly requires otherwise, the singular forms "a," "an," and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listed items. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprises" and the like mean the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, or device including the stated element. In this document, each embodiment focuses on the differences from other embodiments, and the same or similar parts between embodiments can be referred to each other. For the method, product, etc. disclosed in the embodiments, if it corresponds to the method part disclosed in the embodiments, the relevant part can be referred to the description of the method part.

[0145] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of the embodiments of the present disclosure. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0146] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units can only be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to implement the embodiments. In addition, each functional unit in the embodiments of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

[0147] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

Claims

1. A heat exchange system, characterized by, The heat exchange system comprises a compressor, a four-way valve, an outdoor heat exchanger, a first throttling device and at least one indoor heat exchanger which are sequentially connected through refrigerant pipelines, a first refrigerant pipeline is connected between a first end of the four-way valve and the outdoor heat exchanger, a second refrigerant pipeline is connected between the outdoor heat exchanger and the first throttling device, the first throttling device can work in throttling or non-throttling connection; the heat exchange system further comprises: a liquid storage tank arranged in the second refrigerant pipeline; a first bypass pipeline connected between the first refrigerant pipeline and the liquid storage tank; a first valve arranged in the first bypass pipeline; a second throttling device, the indoor heat exchanger comprises a first heat exchanger and a second heat exchanger connected in series, the second throttling device is connected between the first heat exchanger and the second heat exchanger, and the second throttling device can work in throttling or non-throttling connection.

2. The heat exchange system according to claim 1, wherein The first throttling device comprises: a first electronic expansion valve; a second bypass pipeline connected in parallel with the first electronic expansion valve between the second refrigerant pipeline and the indoor heat exchanger; a second valve arranged in the second bypass pipeline.

3. The heat exchange system according to claim 1, wherein the second throttling device comprises a second electronic expansion valve; and / or the first valve comprises a third electronic expansion valve.

4. The heat exchange system according to any one of claims 1 to 3, wherein the number of indoor heat exchangers is multiple, and the multiple indoor heat exchangers connected in parallel are located between a second end of the four-way valve and the first throttling device.

5. The heat exchange system according to claim 4, wherein The indoor heat exchanger further comprises: a third throttling device connected between the first throttling device and the first heat exchanger, the third throttling device can work in throttling or non-throttling connection.

6. The heat exchange system according to claim 5, wherein The third throttling device comprises: a fourth electronic expansion valve; a third bypass pipeline connected in parallel with the fourth electronic expansion valve between the first throttling device and the first heat exchanger; a third valve arranged in the third bypass pipeline.

7. A method for controlling a heat exchange system, characterized by, The heat exchange system is the heat exchange system according to any one of claims 1 to 6, and the method comprises: obtaining an operation mode of the heat exchange system; controlling the first valve, the first throttling device and the second throttling device according to the operation mode.

8. The method of claim 7, wherein, Obtaining the operation mode of the heat exchange system comprises: obtaining an indoor temperature and an indoor humidity; in a case where the indoor temperature is less than or equal to a preset temperature and the indoor humidity is greater than or equal to a preset humidity, determining that the operation mode is a constant-temperature dehumidification mode.

9. The method of claim 8, wherein, Controlling the first valve, the first throttling device and the second throttling device according to the operation mode comprises: in a case where the operation mode is the constant-temperature dehumidification mode, controlling the first valve to open to a third opening degree, the first throttling device to be in non-throttling connection and the second throttling device to work in throttling.

10. The method of claim 7, wherein, Obtaining the operation mode of the heat exchange system further comprises: in a case where the heat exchange system is in heating operation, obtaining a first outdoor temperature and a compressor frequency; in a case where the first outdoor temperature is less than or equal to a first preset temperature and the compressor frequency is greater than or equal to a preset frequency, determining that the operation mode is a first heating mode; in a case where the first outdoor temperature is less than or equal to the first preset temperature and the compressor frequency is less than the preset frequency, determining that the operation mode is a second heating mode; determining that the operation mode is the third heating mode when the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the compressor frequency is greater than or equal to the preset frequency; determining that the operation mode is the fourth heating mode when the first outdoor temperature is greater than the first preset temperature, the first outdoor temperature is less than or equal to the second preset temperature, and the compressor frequency is less than the preset frequency.

11. The method of claim 10, wherein, controlling the first valve, the first throttling device and the second throttling device according to the operation mode, including: controlling the first valve to operate at the first opening degree for the first preset time length and then to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle when the operation mode is the first heating mode; controlling the first valve to be opened to the first opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle when the operation mode is the second heating mode; controlling the first valve to operate at the second opening degree for the second preset time length and then to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle when the operation mode is the third heating mode; controlling the first valve to be opened to the second opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle when the operation mode is the fourth heating mode; wherein the second opening degree is less than the first opening degree.

12. The method according to any one of claims 7 to 11, characterized in that, acquiring the operation mode of the heat exchange system, further including: acquiring a second outdoor temperature when the heat exchange system is in refrigeration operation; determining that the operation mode is a refrigeration liquid storage mode when the second outdoor temperature is less than or equal to a third preset temperature; determining that the operation mode is a refrigeration liquid discharge mode when the second outdoor temperature is greater than the third preset temperature.

13. The method of claim 12, wherein, controlling the first valve, the first throttling device and the second throttling device according to the operation mode, including: controlling the first valve to be closed, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle when the operation mode is the refrigeration liquid storage mode; controlling the first valve to be opened to a fourth opening degree, controlling the first throttling device to work in throttling, and controlling the second throttling device to be connected and not to throttle when the operation mode is the refrigeration liquid discharge mode.

14. An apparatus for controlling a heat exchange system, comprising a processor and a memory having stored therein a program refrigeration, characterized in that, the processor is configured to execute the method for controlling the heat exchange system according to any one of claims 7 to 13 when the program instructions are executed.

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