Method and device for controlling air conditioner, air conditioner and storage medium

Abstract

The air conditioner comprises a refrigerant circulation loop which comprises a compressor, a four-way valve, a first outdoor heat exchanger and an indoor heat exchanger, the first end of the four-way valve is connected with the first end of the compressor, the second end of the four-way valve is connected with the first end of the first outdoor heat exchanger, and the third end of the four-way valve is connected with the first end of the indoor heat exchanger; the fourth end is connected with the second end of the compressor; the heat exchange defrosting branch comprises a second outdoor heat exchanger and a three-way valve, the first end of the second outdoor heat exchanger is connected with the first end of the three-way valve, the second end of the second outdoor heat exchanger is connected with the second end of the indoor heat exchanger, and the second end of the three-way valve is connected with the first end of the first outdoor heat exchanger; the high-pressure gaseous refrigerant branch comprises a gas pipe electromagnetic valve, the first end of the gas pipe electromagnetic valve is connected with the first end of the compressor, and the second end is connected with the third end of the three-way valve; and / or the high-pressure liquid refrigerant branch comprises a liquid pipe electromagnetic valve, the first end of the liquid pipe electromagnetic valve is connected with the second end of the indoor heat exchanger, and the second end of the liquid pipe electromagnetic valve is connected with the third end of the three-way valve.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling an air conditioner, an air conditioner, and a storage medium. Background Art

[0002] At present, with the improvement of people's living standards, people have put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an indispensable equipment in people's lives. However, during the operation of air conditioners, frost is prone to occur.

[0003] The related technology discloses a heat exchanger system, an outdoor unit and an air conditioner. The heat exchanger system includes: an outdoor heat exchanger, a defrost switching assembly and a liquid separation switching assembly. The outdoor heat exchanger has at least two heat exchange sections. The liquid separation switching assembly is used to connect the inlets of different heat exchange sections when they are in a heating state; the defrost switching assembly includes a three-way valve, and the outlet of each heat exchange section when it is in a heating state is configured with a reversing control component. The first port of the three-way valve is connected to the exhaust side of the compressor, and the second port and the third port of the three-way valve are respectively connected between different heat exchange sections and their corresponding reversing control components through pipelines.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] When the exhaust pipe group of the air conditioner system is used for defrosting in the related art, the heating capacity of the air conditioner is affected, the heating experience of the user is affected, and thus the user's comfort is affected.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a method and device for controlling an air conditioner, an air conditioner, and a storage medium, so as to reduce the impact on the heating capacity of the air conditioner when the air conditioner is defrosted, improve the user's heating experience, and improve the user's comfort.

[0009] In some embodiments, the air conditioner includes: a refrigerant circulation loop, including: a compressor, a four-way valve, a first outdoor heat exchanger, and an indoor heat exchanger, the first end of the four-way valve is connected to the first end of the compressor, the second end is connected to the first end of the first outdoor heat exchanger, the third end is connected to the first end of the indoor heat exchanger, and the fourth end is connected to the second end of the compressor; a heat exchange defrost branch, including a second outdoor heat exchanger and a three-way valve, the first end of the second outdoor heat exchanger is connected to the first end of the three-way valve, the second end is connected to the second end of the indoor heat exchanger, and the second end of the three-way valve is connected to the first end of the first outdoor heat exchanger; a high-pressure gaseous refrigerant branch, including an air pipe solenoid valve, the first end of the air pipe solenoid valve is connected to the first end of the compressor, and the second end is connected to the third end of the three-way valve; and / or, a high-pressure liquid refrigerant branch, including a liquid pipe solenoid valve, the first end of the liquid pipe solenoid valve is connected to the second end of the indoor heat exchanger, and the second end is connected to the third end of the three-way valve.

[0010] Optionally, the air conditioner further comprises: a heat storage branch, and the gas pipe solenoid valve and / or the liquid pipe solenoid valve are connected to the third end of the three-way valve via the heat storage branch.

[0011] Optionally, the heat storage branch further includes: a heat storage device; a heat storage main path, the heat storage device is arranged on the heat storage main path; and a bypass branch, the bypass branch is connected in parallel with the heat storage main path.

[0012] Optionally, the heat storage branch also includes: a main solenoid valve, which is arranged on the heat storage main road and controls the on-off of the heat storage main road; a bypass solenoid valve, which is arranged on the bypass branch and controls the on-off of the bypass branch.

[0013] In some embodiments, the method is applied to the air conditioner, including: determining the operating mode of the air conditioner; according to the operating mode of the air conditioner, controlling the on and off of the four-way valve, the three-way valve, the gas pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve to enable frost-free operation or defrost operation of the air conditioner.

[0014] Optionally, determining the operating mode of the air conditioner includes: determining that the operating mode of the air conditioner is a conventional cooling mode; or, based on the pipe temperature of the first outdoor heat exchanger, determining the heating mode type of the air conditioner to be a heating frost-free mode, a heating reverse cycle defrost mode, a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode, or a heating high-pressure liquid pipe waste heat storage device defrost mode.

[0015] Optionally, according to the pipe temperature of the first outdoor heat exchanger, the heating mode type of the air conditioner is determined to be a heating frost-free mode, a heating reverse cycle defrost mode, a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode, and a heating high-pressure liquid pipe waste heat storage device defrost mode, including: when the pipe temperature of the first outdoor heat exchanger is in a first temperature range, the heating mode of the air conditioner is determined to be a heating reverse cycle defrost mode; when the pipe temperature of the first outdoor heat exchanger is in a second temperature range, the heating mode of the air conditioner is determined to be a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode; when the pipe temperature of the first outdoor heat exchanger is in a third temperature range, the heating mode of the air conditioner is determined to be a heating high-pressure liquid pipe waste heat storage device defrost mode; when the pipe temperature of the first outdoor heat exchanger is in a fourth temperature range, the heating mode of the air conditioner is determined to be a heating frost-free mode; wherein the first temperature range is smaller than the second temperature range, the second temperature range is smaller than the third temperature range, and the third temperature range is smaller than the fourth temperature range.

[0016] Optionally, according to the operating mode of the air conditioner, the on and off of the four-way valve, the three-way valve, the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are controlled, including: when the operating mode of the air conditioner is the conventional cooling mode, the first end of the four-way valve is controlled to be connected with the second end, the third end is connected with the fourth end, the first end of the three-way valve is connected with the second end, and the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the first outdoor heat exchanger, the indoor heat exchanger, the four-way valve in sequence, and then flows back to the compressor, and the refrigerant in the heat exchange and defrost branch flows through the compressor, the four-way valve, the three-way valve, the second outdoor heat exchanger, the indoor heat exchanger, the four-way valve in sequence, and then flows back to the compressor.

[0017] Optionally, according to the operating mode of the air conditioner, the on and off of the four-way valve, the three-way valve, the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are controlled, including: when the operating mode of the air conditioner is the heating and frost-free mode, the first end of the four-way valve is controlled to be connected to the third end, the second end to the fourth end, the first end to the second end of the three-way valve is controlled to be connected, and the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the indoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence, and then flows back to the compressor, and the refrigerant in the heat exchange and defrost branch flows through the compressor, the four-way valve, the indoor heat exchanger, the second outdoor heat exchanger, the three-way valve, and the four-way valve in sequence and then flows back to the compressor.

[0018] Optionally, according to the operating mode of the air conditioner, the on-off of the four-way valve, the three-way valve, the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are controlled, including: when the operating mode of the air conditioner is the defrosting mode of the heating high-pressure air pipe exhaust sensible heat storage device, the air pipe solenoid valve is controlled to be opened, the liquid pipe solenoid valve is closed, the first end and the third end of the three-way valve are connected, the first end and the third end of the four-way valve are connected, and the second end and the fourth end are connected, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the indoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor; according to the temperature T1 of the heat storage device and the temperature T2 of the air pipe solenoid valve, the switching states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange and defrosting branch flows through the compressor, the air pipe solenoid valve, the main solenoid valve or the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor.

[0019] Optionally, the switching states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off according to the temperature T1 of the heat storage device and the temperature T2 of the air pipe solenoid valve, including: when T1≥T2, the main solenoid valve is controlled to be opened and the bypass solenoid valve is closed, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange and defrost branch flows through the compressor, the air pipe solenoid valve, the main solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, and the four-way valve in sequence before flowing back to the compressor; when T1<T2, the main solenoid valve is controlled to be closed and the bypass solenoid valve is opened, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange and defrost branch flows through the compressor, the air pipe solenoid valve, the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, and the four-way valve in sequence before flowing back to the compressor.

[0020] Optionally, according to the operating mode of the air conditioner, the on-off of the four-way valve, the three-way valve, the gas pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are controlled, including: when the operating mode of the air conditioner is the heating high-pressure liquid pipe waste heat storage device heat defrosting mode, the first end of the four-way valve is controlled to be connected to the third end, the second end to the fourth end, the first end to the third end of the three-way valve is controlled to be connected, the liquid pipe solenoid valve is opened, and the gas pipe solenoid valve is closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the indoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor; according to the temperature T1 of the heat storage device and the temperature T3 of the liquid pipe solenoid valve, the switching states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrosting branch flows through the compressor, the four-way valve, the indoor heat exchanger, the liquid pipe solenoid valve, the main solenoid valve or the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor.

[0021] Optionally, the switching states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off according to the temperature T1 of the heat storage device and the temperature T3 of the liquid pipe solenoid valve, including: when T1≤T3, the main solenoid valve is controlled to be open and the bypass solenoid valve is controlled to be closed, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrost branch flows through the compressor, the four-way valve, the indoor heat exchanger, the liquid pipe solenoid valve, the main solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, and the four-way valve in sequence before flowing back to the compressor; when T1>T3, the main solenoid valve is controlled to be closed and the bypass solenoid valve is controlled to be opened, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrost branch flows through the compressor, the four-way valve, the indoor heat exchanger, the liquid pipe solenoid valve, the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, and the four-way valve in sequence before flowing back to the compressor.

[0022] Optionally, according to the operating mode of the air conditioner, the on and off of the four-way valve, the three-way valve, the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are controlled, including: when the operating mode of the air conditioner is the heating reverse cycle defrost mode, the first end of the four-way valve is controlled to be connected with the second end, the third end is connected with the fourth end, the first end of the three-way valve is connected with the second end, and the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the first outdoor heat exchanger, the indoor heat exchanger, the four-way valve in sequence, and then flows back to the compressor, and the refrigerant in the heat exchange and defrost branch flows through the compressor, the four-way valve, the three-way valve, the second outdoor heat exchanger, the indoor heat exchanger, the four-way valve in sequence and then flows back to the compressor.

[0023] In some embodiments, the device is applied to the air conditioner and includes: a determination module, configured to determine the operating mode of the air conditioner; a control module, configured to control the on and off of the four-way valve, the three-way valve, the air pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve according to the operating mode of the air conditioner to enable frost-free operation or defrost operation of the air conditioner.

[0024] In some embodiments, the air conditioner comprises: an air conditioner body, comprising: a refrigerant circulation circuit, comprising: a refrigerant circulation circuit, comprising: a compressor, a four-way valve, a first outdoor heat exchanger, an indoor heat exchanger, the first end of the four-way valve is connected to the first end of the compressor, the second end is connected to the first end of the first outdoor heat exchanger, the third end is connected to the first end of the indoor heat exchanger, and the fourth end is connected to the second end of the compressor; a heat exchange defrost branch, comprising a second outdoor heat exchanger and a three-way valve, the first end of the second outdoor heat exchanger is connected to the first end of the three-way valve, the second end is connected to the second end of the indoor heat exchanger, and the second end of the three-way valve is connected to the first end of the first outdoor heat exchanger; a high-pressure gaseous refrigerant branch, comprising an air pipe solenoid valve, the first end of the air pipe solenoid valve is connected to the first end of the compressor, and the second end is connected to the third end of the three-way valve; and / or, a high-pressure liquid refrigerant branch, comprising a liquid pipe solenoid valve, the first end of the liquid pipe solenoid valve is connected to the second end of the indoor heat exchanger, and the second end is connected to the third end of the three-way valve; the device for controlling the air conditioner is installed on the air conditioner body.

[0025] In some embodiments, the storage medium stores program instructions, and when the program instructions are run, they execute the method for controlling the air conditioner.

[0026] The method and device for controlling an air conditioner, the air conditioner, and the storage medium provided in the embodiments of the present disclosure can achieve the following technical effects:

[0027] By setting a heat exchange defrost branch including a second outdoor heat exchanger and a three-way valve, in the initial stage of heating, the first outdoor heat exchanger and the second outdoor heat exchanger absorb heat from the heat exchanger. After the set conditions are met, part of the high-temperature refrigerant enters the heat exchange defrost branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch, thereby achieving defrosting of the second outdoor heat exchanger, and the heat in the second outdoor heat exchanger heats the inlet air temperature of the first outdoor heat exchanger. The refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch enters the heat exchange defrost branch, increasing the heating capacity of the air conditioner and achieving better defrosting. Therefore, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0028] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0030] Figure 1is a schematic diagram of the structure of an air conditioner provided by an embodiment of the present disclosure;

[0031] Figure 2 is a schematic diagram of the refrigerant flow direction of an air conditioner in a conventional cooling mode provided by an embodiment of the present disclosure;

[0032] Figure 3 is a schematic diagram of the refrigerant flow direction of an air conditioner in a heating and frost-free mode provided by an embodiment of the present disclosure;

[0033] Figure 4 It is a schematic diagram of the refrigerant flow direction of an air conditioner provided by an embodiment of the present disclosure in a defrosting mode of a sensible heat storage device of a heating high-pressure gas pipe exhaust;

[0034] Figure 5 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0035] Figure 6 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0036] Figure 7 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0037] Figure 8 is a schematic diagram of another device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0038] Fig. 9 It is a schematic diagram of an air conditioner provided in an embodiment of the present disclosure.

[0039] Reference numerals:

[0040] 1: compressor; 2: oil separator; 3: four-way valve; 4: first outdoor heat exchanger; 5: second outdoor heat exchanger; 6: heat storage device; 7: high-pressure liquid storage device; 8: first indoor heat exchanger; 9: first indoor electronic expansion valve; 10: second indoor heat exchanger; 11: second indoor electronic expansion valve; 12: third indoor heat exchanger; 13: third indoor electronic expansion valve; 14: fourth indoor heat exchanger; 15: fourth indoor electronic expansion valve; 16: gas pipe solenoid valve; 17: liquid pipe solenoid valve; 18: first outdoor Electronic expansion valve; 19: second outdoor electronic expansion valve; 20: main solenoid valve; 21: bypass solenoid valve; 22: liquid pipe stop valve; 23: gas pipe stop valve; 24: outdoor fan; 25: subcooler; 26: three-way valve; 27: gas-liquid separator; 200: device for controlling air conditioner; 701: determination module; 702: control module; 300: device for controlling air conditioner; 800: processor; 801: memory; 802: communication interface; 803: bus; 100: air conditioner. DETAILED DESCRIPTION

[0041] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0042] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0043] Unless otherwise stated, the term "plurality" means two or more.

[0044] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0045] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0046] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0047] Combination Figure 1As shown, an embodiment of the present disclosure provides an air conditioner, including: a refrigerant circulation circuit, a heat exchange defrosting branch, a heat storage branch, a high-pressure gaseous refrigerant branch or a high-pressure liquid refrigerant branch. The refrigerant circulation circuit includes: a compressor 1, a four-way valve 3, a first outdoor heat exchanger 4, and an indoor heat exchanger. The first end of the four-way valve 3 is connected to the first end of the compressor 1, the second end is connected to the first end of the first outdoor heat exchanger 4, the third end is connected to the first end of the indoor heat exchanger, and the fourth end is connected to the second end of the compressor 1. The heat exchange defrosting branch includes a second outdoor heat exchanger 5 and a three-way valve 26. The first end of the second outdoor heat exchanger 5 is connected to the first end of the three-way valve 26, the second end is connected to the second end of the indoor heat exchanger, and the second end of the three-way valve 26 is connected to the first end of the first outdoor heat exchanger 4. The high-pressure gaseous refrigerant branch includes an air pipe solenoid valve 16. The first end of the air pipe solenoid valve 16 is connected to the first end of the compressor 1, and the second end is connected to the third end of the three-way valve 26. And / or, the high-pressure liquid refrigerant branch includes a liquid pipe solenoid valve 17, a first end of the liquid pipe solenoid valve 17 is connected to the second end of the indoor heat exchanger, and a second end is connected to the third end of the three-way valve 26.

[0048] The air conditioner provided by the embodiment of the present disclosure is provided with a heat exchange defrost branch including a second outdoor heat exchanger 5 and a three-way valve 26. In the initial stage of heating, the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 absorb heat from the heat exchanger. After the set conditions are met, part of the high-temperature refrigerant enters the heat exchange defrost branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch, thereby achieving defrosting of the second outdoor heat exchanger 5, and the heat in the second outdoor heat exchanger 5 heats the inlet air temperature of the first outdoor heat exchanger 4. The heat storage branch allows the refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to enter the heat exchange defrost branch, thereby increasing the heating capacity of the air conditioner and achieving better defrosting. Therefore, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0049] Optionally, the air conditioner further includes: a heat storage branch. The heat storage branch, the gas pipe solenoid valve 16 and / or the liquid pipe solenoid valve 17 are connected to the third end of the three-way valve 26 through the heat storage branch. In this way, in the initial stage of heating, the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 absorb heat from the heat exchanger. After the set conditions are met, part of the high-temperature refrigerant enters the heat exchange defrost branch and / or the heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch, thereby achieving defrosting of the second outdoor heat exchanger 5, and the heat in the second outdoor heat exchanger 5 and the heat storage branch heats the inlet air temperature of the first outdoor heat exchanger 4. The heat storage branch allows the refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to enter the heat exchange defrost branch and / or the heat storage branch, and obtains the heat of the heat storage device 6 when the air conditioner is heating or defrosting, thereby increasing the heating capacity of the air conditioner and achieving better defrosting. Thereby, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0050] Optionally, the heat storage branch also includes: a heat storage device 6, a heat storage main path and a bypass branch. The heat storage main path, the heat storage device 6 is arranged on the heat storage main path. The bypass branch is connected in parallel with the heat storage main path. In this way, in the initial stage of heating, the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 absorb heat from the heat exchanger, and after meeting the set conditions, part of the high-temperature refrigerant enters the heat exchange defrosting branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch, and / or the heat storage main path or the bypass branch, so as to achieve defrosting of the second outdoor heat exchanger 5, and the heat in the second outdoor heat exchanger 5 and the heat storage main path or the bypass branch heats the inlet air temperature of the first outdoor heat exchanger 4. The heat storage main path or bypass branch allows the refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to flow into the heat exchange defrosting branch and / or the heat storage main path or bypass branch, and obtain the heat of the heat storage device 6 when the air conditioner is heating or defrosting, thereby increasing the heating capacity of the air conditioner and achieving better defrosting. Therefore, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0051] Optionally, the heat storage branch also includes: a main solenoid valve 20 and a bypass solenoid valve 21. The main solenoid valve 20 is arranged on the heat storage main road, and the main solenoid valve 20 controls the on-off of the heat storage main road. The bypass solenoid valve 21 is arranged on the bypass branch, and the bypass solenoid valve 21 controls the on-off of the bypass branch. In this way, if the main solenoid valve 20 is opened and the bypass solenoid valve 21 is closed, the refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch flows through the heat storage device 6 and enters the heat exchange defrosting branch, obtains the heat of the heat storage device 6, and uses the heat storage device 6 and the sensible heat of the exhaust pipe to defrost at the same time, thereby increasing the heating amount of the air conditioner and achieving better defrosting. If the main solenoid valve 20 is closed and the bypass solenoid valve 21 is opened, the refrigerant transports the high-temperature refrigerant to the second outdoor heat exchanger 5 through the bypass branch. If the temperature of the heat storage device 6 is low at this time, the heat storage device 6 will not exchange heat with the high-temperature refrigerant, thereby avoiding reducing the temperature of the high-temperature refrigerant, thereby improving the defrosting effect.

[0052] Optionally, the refrigerant circulation loop further includes: an oil separator 2, a first outdoor electronic expansion valve 18, a gas-liquid separator 27, an indoor electronic expansion valve, and a high-pressure liquid reservoir 7. The oil separator 2 is arranged between the first end of the compressor 1 and the first end of the four-way valve 3. The high-pressure liquid reservoir 7 is arranged between the second end of the first outdoor heat exchanger 4 and the second end of the indoor heat exchanger. The first outdoor electronic expansion valve 18 is arranged between the second end of the first outdoor heat exchanger 4 and the high-pressure liquid reservoir 7. The indoor electronic expansion valve is arranged between the high-pressure liquid reservoir 7 and the second end of the indoor heat exchanger.

[0053] Optionally, the heat exchange defrosting branch further includes: a first outdoor electronic expansion valve 19. The first outdoor electronic expansion valve 19 is disposed between the second end of the second outdoor heat exchanger 5 and the high-pressure liquid storage tank 7.

[0054] Optionally, the refrigerant circulation loop further includes: a one-way valve. The one-way valve is arranged between the first end of the compressor 1 and the first end of the four-way valve 3 .

[0055] Optionally, the refrigerant circulation loop further includes: a subcooler 25. The subcooler 25 is arranged between the high-pressure liquid storage tank 7 and the indoor electronic expansion valve.

[0056] Optionally, the refrigerant circulation loop further includes: a gas pipe stop valve 23. The gas pipe stop valve 23 is arranged between the first end of the indoor heat exchanger and the third end of the four-way valve 3.

[0057] Optionally, the refrigerant circulation loop further includes: a liquid pipe stop valve 22. The liquid pipe stop valve 22 is arranged between the subcooler 25 and the indoor electronic expansion valve.

[0058] Optionally, the air conditioner further includes: an outdoor fan 24. The outdoor fan 24 is arranged on the first side of the second outdoor heat exchanger 5, and can blow wind to the second side of the second outdoor heat exchanger 5. The first outdoor heat exchanger 4 is arranged on the second side of the second outdoor heat exchanger 5. In this way, the outdoor fan 24 blows the airflow from the outdoors to the second outdoor heat exchanger 5 and the first outdoor heat exchanger 4 in sequence. When the second outdoor heat exchanger 5 releases heat, the outdoor fan 24 obtains heat from the second outdoor heat exchanger 5, and then blows the airflow to the first outdoor heat exchanger 4 for defrosting, thereby achieving defrosting of the outdoor heat exchanger.

[0059] Optionally, the heat storage device 6 may be in the form of a water tank. The energy source of the heat storage device 6 may be solar energy.

[0060] Optionally, the number of indoor heat exchangers may be one or more. Specifically, when the number of indoor heat exchangers is 4, the indoor heat exchangers include a first indoor heat exchanger 8, a second indoor heat exchanger 10, a third indoor heat exchanger 12 and a fourth indoor heat exchanger 14 connected in parallel.

[0061] Optionally, the number of indoor electronic expansion valves is the same as the number of indoor heat exchangers. Specifically, when the number of indoor heat exchangers is 4, the number of indoor electronic expansion valves is 4, and the indoor electronic expansion valves include a first indoor electronic expansion valve 9, a second indoor electronic expansion valve 11, a third indoor electronic expansion valve 13 and a fourth indoor electronic expansion valve 15 connected in parallel. The first indoor electronic expansion valve 9, the first indoor heat exchanger 8 is connected to the high-pressure liquid reservoir 7 through the first indoor electronic expansion valve 9. The second indoor electronic expansion valve 11, the second indoor heat exchanger 10 is connected to the high-pressure liquid reservoir 7 through the second indoor electronic expansion valve 11. The third indoor electronic expansion valve 13, the third indoor heat exchanger 12 is connected to the high-pressure liquid reservoir 7 through the third indoor electronic expansion valve 13. The fourth indoor electronic expansion valve 15, the fourth indoor heat exchanger 14 is connected to the high-pressure liquid reservoir 7 through the fourth indoor electronic expansion valve 15.

[0062] Combination Figure 5 As shown, the embodiment of the present disclosure provides a method for controlling an air conditioner, comprising:

[0063] S501, the air conditioner determines an operation mode of the air conditioner.

[0064] S502, the air conditioner controls the on-off of the four-way valve 3, the three-way valve 26, the gas pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 according to the operating mode of the air conditioner to enable the air conditioner to operate in a frost-free mode or a defrosting mode.

[0065] The method for controlling the air conditioner provided by the embodiment of the present disclosure is adopted. By setting a heat exchange defrost branch including a second outdoor heat exchanger 5 and a three-way valve 26, the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 in the refrigerant circulation loop can take heat from the environment in the initial stage of heating. After reaching the set conditions, they can enter the heat exchange defrost branch and / or the heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to achieve defrosting of the second outdoor heat exchanger 5, and the heat in the second outdoor heat exchanger 5 and the heat storage branch heats the inlet air temperature of the first outdoor heat exchanger 4. The heat storage branch can allow the refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to flow through the heat storage device 6 and then enter the heat exchange defrost branch, and obtain the heat of the heat storage device 6 when the air conditioner is defrosted, so as to achieve better defrosting. Controlling the on and off of the four-way valve 3, the three-way valve 26, the gas pipe solenoid valve 16, and the liquid pipe solenoid valve 17 according to the operation mode of the air conditioner is conducive to switching the refrigerant flow direction in the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5, and can enable the first heat exchanger and the second heat exchanger to obtain heat from the environment in the initial stage, and after reaching the set conditions, enter the heat exchange defrosting branch and / or the heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch. Thereby, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0066] Optionally, the air conditioner determines the operation mode of the air conditioner, including: the air conditioner determines that the operation mode of the air conditioner is a conventional cooling mode. Or, the air conditioner determines the heating mode type of the air conditioner as a heating frost-free mode, a heating reverse cycle defrost mode, a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode, and a heating high-pressure liquid pipe residual heat storage device defrost mode according to the pipe temperature of the first outdoor heat exchanger 4. In this way, the pipe temperature of the first outdoor heat exchanger 4 is conducive to reflecting the degree of frost on the first outdoor heat exchanger 4. Determining the heating mode of the air conditioner according to the pipe temperature of the first outdoor heat exchanger 4 is conducive to better determining the operating mode of the air conditioner as any one of the conventional refrigeration mode, heating frost-free mode, heating reverse cycle defrost mode, heating high-pressure gas pipe exhaust sensible heat storage device defrost mode, and heating high-pressure liquid pipe waste heat storage device defrost mode, so as to more accurately control the on and off of the four-way valve 3, the three-way valve 26, the gas pipe solenoid valve 16, and the liquid pipe solenoid valve 17 according to the operating mode of the air conditioner to achieve frost-free operation or defrost operation of the air conditioner.

[0067] Optionally, the air conditioner determines the heating mode type of the air conditioner as a heating frost-free mode, a heating reverse cycle defrost mode, a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode, and a heating high-pressure liquid pipe residual heat storage device defrost mode according to the pipe temperature of the first outdoor heat exchanger 4, including: when the pipe temperature of the first outdoor heat exchanger 4 is in the first temperature interval, the air conditioner determines the heating mode of the air conditioner as a heating reverse cycle defrost mode. When the pipe temperature of the first outdoor heat exchanger 4 is in the second temperature interval, the air conditioner determines the heating mode of the air conditioner as a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode. When the pipe temperature of the first outdoor heat exchanger 4 is in the third temperature interval, the air conditioner determines the heating mode of the air conditioner as a heating high-pressure liquid pipe residual heat storage device defrost mode. When the pipe temperature of the first outdoor heat exchanger 4 is in the fourth temperature interval, the air conditioner determines the heating mode of the air conditioner as a heating frost-free mode. Among them, the first temperature interval is smaller than the second temperature interval, the second temperature interval is smaller than the third temperature interval, and the third temperature interval is smaller than the fourth temperature interval. In this way, if the pipe temperature of the first outdoor heat exchanger 4 is in the lowest first temperature interval, the frosting degree of the air conditioner is the most serious, and the operation mode of the air conditioner is controlled to be the heating reverse cycle defrosting mode, so that the heating amount for defrosting is the largest, and the defrosting is achieved with the greatest force. If the pipe temperature of the first outdoor heat exchanger 4 is in the lower second temperature interval, the frosting degree of the air conditioner is more serious, and the operation mode of the air conditioner is controlled to be the heating high-pressure gas pipe exhaust sensible heat storage device defrosting mode, so that the heating amount for defrosting is larger, and the defrosting is achieved with greater force. If the pipe temperature of the first outdoor heat exchanger 4 is in the higher third temperature interval, the frosting degree of the air conditioner is less severe, and the operation mode of the air conditioner is controlled to be the heating high-pressure liquid pipe residual heat storage device defrosting mode, so that the heating amount for defrosting is smaller, and the defrosting is achieved with less force. If the pipe temperature of the first outdoor heat exchanger 4 is in the higher fourth temperature interval, the frosting degree of the air conditioner is the least severe, and the operation mode of the air conditioner is controlled to be the heating high-pressure liquid pipe residual heat storage device defrosting mode, so that the heating amount for defrosting is the smallest, and the defrosting is achieved with the smallest force. This is conducive to more accurately determining the operation mode of the air conditioner according to the pipe temperature of the first outdoor heat exchanger 4, thereby more accurately determining the operation mode of the air conditioner according to the degree of frost, and further more accurately controlling the heating amount and defrosting intensity used for defrosting according to the degree of frost. When the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0068] Optionally, the value of the first temperature interval can be (-∞, -6°C]. The value of the second temperature interval can be [-6°C, -4°C]. The value of the third temperature interval can be [-4°C, -2°C]. The values ​​of the first temperature interval, the second temperature interval and the third temperature interval can be adjusted and set according to the properties of the air conditioner, and are not listed one by one here. In this way, limiting the values ​​of the first temperature interval, the second temperature interval and the third temperature interval is conducive to more accurately determining the operating mode of the air conditioner according to the pipe temperature of the first outdoor heat exchanger 4, thereby more accurately determining the operating mode of the air conditioner according to the degree of frost, and then more accurately controlling the heating amount and defrosting intensity used for defrosting according to the degree of frost. Then, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0069] Optionally, combined Figure 2 As shown, the air conditioner controls the on and off of the four-way valve 3, the three-way valve 26, the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 according to the operation mode of the air conditioner, including: when the operation mode of the air conditioner is the conventional cooling mode, the air conditioner controls the first end of the four-way valve 3 to be connected with the second end, the third end to be connected with the fourth end, the first end to the second end of the three-way valve 26 to be connected, and the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 to be closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor 1, the four-way valve 3, the first outdoor heat exchanger 4, the indoor heat exchanger, the four-way valve 3 in sequence and then flows back to the compressor 1, and the refrigerant in the heat exchange and defrosting branch flows through the compressor 1, the four-way valve 3, the three-way valve 26, the second outdoor heat exchanger 5, the indoor heat exchanger, the four-way valve 3 in sequence and then flows back to the compressor 1. In this way, when the operating mode of the air conditioner is the conventional cooling mode, the refrigerant that has completed the heat exchange does not pass through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch. The first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 of the heat exchange defrost branch both release heat and act as a condenser, while the indoor heat exchanger absorbs heat and acts as an evaporator. At this time, the heat exchange defrost branch is not used for defrosting. Under the action of the outdoor fan 24, the airflow passes through the second outdoor heat exchanger 5 and the first outdoor heat exchanger 4 in turn to release heat from the air. This is conducive to better heat release of the outdoor heat exchanger and improves the cooling experience of the air conditioner.

[0070] Optionally, combined Figure 3As shown, the air conditioner controls the on-off of the four-way valve 3, the three-way valve 26, the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 according to the operation mode of the air conditioner, including: when the operation mode of the air conditioner is the heating frost-free mode, the air conditioner controls the first end of the four-way valve 3 to be connected with the third end, the second end to be connected with the fourth end, the first end to the second end of the three-way valve 26 to be connected, and the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 are closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the first outdoor heat exchanger 4, the four-way valve 3 in sequence and then flows back to the compressor 1, and the refrigerant in the heat exchange and defrosting branch flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the second outdoor heat exchanger 5, the three-way valve 26, the four-way valve 3 in sequence and then flows back to the compressor 1. In this way, when the air conditioner is running in the heating and frost-free mode, the system re-runs the refrigerant without passing through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch. The refrigerant coming out of the indoor heat exchanger enters the heat exchange defrost branch. The indoor heat exchanger releases heat and acts as a condenser, and the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 both absorb heat and act as an evaporator. Under the action of the outdoor fan 24, the airflow passes through the second outdoor heat exchanger 5 and the first outdoor heat exchanger 4 in turn to absorb heat from the air. At this time, the heat exchange defrost branch is used to obtain heat from the environment to improve the user's heating experience and improve the user's comfort.

[0071] Optionally, combined Figure 4As shown, the air conditioner controls the on-off of the four-way valve 3, the three-way valve 26, the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 according to the operating mode of the air conditioner, including: when the operating mode of the air conditioner is the defrosting mode of the high-pressure air pipe exhaust sensible heat storage device for heating, the air conditioner controls the air pipe solenoid valve 16 to open, the liquid pipe solenoid valve 17 to close, the first end and the third end of the three-way valve 26 are connected, the first end and the third end of the four-way valve 3 are connected, and the second end and the fourth end are connected, so that the refrigerant in the refrigerant circulation loop flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the first outdoor heat exchanger 4, the four-way valve 3 in sequence, and then flows back to the compressor 1. The air conditioner controls the switch states of the main solenoid valve 20 and the bypass solenoid valve 21 to be one open and one closed according to the temperature T1 of the heat storage device 6 and the temperature T2 of the air pipe solenoid valve 16, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange defrost branch flows through the compressor 1, the air pipe solenoid valve 16, the main solenoid valve 20 or the bypass solenoid valve 21, the three-way valve 26, the second outdoor heat exchanger 5, the first outdoor heat exchanger 4, and the four-way valve 3 in sequence and then flows back to the compressor 1. In this way, when the air conditioner operates in the defrosting mode of the heating high-pressure air pipe exhaust sensible heat storage device, the heating amount and defrosting force required for defrosting are relatively large, and the refrigerant enters the heat exchange defrost branch and / or the heat storage branch through the high-pressure gaseous refrigerant branch. The indoor heat exchanger releases heat and acts as a condenser. The first outdoor heat exchanger 4 absorbs heat and acts as an evaporator. Since the second outdoor heat exchanger 5 has a high-temperature gaseous refrigerant entering through the high-pressure gaseous refrigerant branch, the frost on the surface of the second outdoor heat exchanger 5 can be melted, and the inlet air temperature of the first outdoor heat exchanger 4 can be heated, thereby achieving defrosting of the first outdoor heat exchanger 4. Since the indoor heat exchanger and the first outdoor heat exchanger 4 can achieve normal heating at this time, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, thereby improving the user's heating experience and user comfort.

[0072] Optionally, the air conditioner controls the switching states of the main solenoid valve 20 and the bypass solenoid valve 21 to be one on and one off according to the temperature T1 of the heat storage device 6 and the temperature T2 of the air pipe solenoid valve 16, including: when T1≥T2, the main solenoid valve 20 is controlled to be opened and the bypass solenoid valve 21 is closed, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange and defrost branch flows through the compressor 1, the air pipe solenoid valve 16, the main solenoid valve 20, the three-way valve 26, the second outdoor heat exchanger 5, the first outdoor heat exchanger 4, and the four-way valve 3 in sequence and then flows back to the compressor 1; when T1<T2, the main solenoid valve 20 is controlled to be closed and the bypass solenoid valve 21 is opened, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange and defrost branch flows through the compressor 1, the air pipe solenoid valve 16, the bypass solenoid valve 21, the three-way valve 26, the second outdoor heat exchanger 5, the first outdoor heat exchanger 4, and the four-way valve 3 in sequence and then flows back to the compressor 1. In this way, when the air conditioner is running in the defrosting mode of the high-pressure gas pipe exhaust sensible heat storage device for heating, if the temperature of the heat storage device 6 is relatively high, higher than the temperature of the gas pipe solenoid valve 16 in the high-pressure gaseous refrigerant branch, the main solenoid valve 20 is opened and the bypass solenoid valve 21 is closed, so that the refrigerant in the high-pressure gaseous refrigerant branch flows through the heat storage device 6 and then enters the heat exchange defrosting branch, obtains the heat of the heat storage device 6, and uses the heat storage device 6 and the sensible heat of the exhaust pipe to simultaneously perform defrosting, thereby increasing the heating capacity of the air conditioner and achieving better defrosting. If the temperature of the heat storage device 6 is relatively low, lower than the temperature of the gas pipe solenoid valve 16 in the high-pressure gaseous refrigerant branch, the main solenoid valve 20 is closed and the bypass solenoid valve 21 is opened, so that the refrigerant in the high-pressure gaseous refrigerant branch does not flow through the heat storage device 6 and directly enters the heat exchange defrosting branch, does not obtain the heat of the heat storage device 6, and only uses the sensible heat of the exhaust pipe to perform defrosting, without additionally increasing the heating capacity of the air conditioner. By controlling the switch of the main solenoid valve 20 and the bypass solenoid valve 21 according to the temperature of the gas pipe solenoid valve 16, it is helpful to determine whether the refrigerant in the high-pressure gaseous refrigerant branch flows through the heat storage device 6 and then enters the heat exchange defrosting branch when the air conditioner is defrosted, which is helpful to increase the heating capacity of the air conditioner and achieve better defrosting, or not to increase the heating capacity of the air conditioner additionally. It is helpful to improve the heating experience of users.

[0073] Optionally, the air conditioner controls the on and off of the four-way valve 3, the three-way valve 26, the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 according to the operating mode of the air conditioner, including: when the operating mode of the air conditioner is the heating high-pressure liquid pipe waste heat storage device heat defrost mode, the air conditioner controls the first end of the four-way valve 3 to be connected with the third end, the second end to be connected with the fourth end, the first end to the third end of the three-way valve 26 to be connected, the liquid pipe solenoid valve 17 to be opened, and the air pipe solenoid valve 16 to be closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the first outdoor heat exchanger 4, the four-way valve 3 in sequence, and then flows back to the compressor 1. The air conditioner controls the switch states of the main solenoid valve 20 and the bypass solenoid valve 21 to be one open and one closed according to the temperature T1 of the heat storage device 6 and the temperature T3 of the liquid pipe solenoid valve 17, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange defrost branch flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the liquid pipe solenoid valve 17, the main solenoid valve 20 or the bypass solenoid valve 21, the three-way valve 26, the second outdoor heat exchanger 5, the first outdoor heat exchanger 4, and the four-way valve 3 in sequence and then flows back to the compressor 1. In this way, when the air conditioner operates in the heat defrosting mode of the heating high-pressure liquid pipe waste heat storage device, the heating amount and defrosting force required for defrosting are small, and the refrigerant after heat exchange passes through the high-pressure liquid refrigerant branch to enter the heat exchange defrost branch and / or the heat storage branch. The indoor heat exchanger is controlled to release heat and acts as a condenser. The first outdoor heat exchanger 4 is controlled to absorb heat and acts as an evaporator. Since the second outdoor heat exchanger 5 has high-temperature liquid refrigerant entering through the high-pressure liquid refrigerant branch, the frost on the surface of the second outdoor heat exchanger 5 can be melted, and the inlet air temperature of the first outdoor heat exchanger 4 can be heated, thereby achieving defrosting of the first outdoor heat exchanger 4. Since the indoor heat exchanger and the first outdoor heat exchanger 4 can achieve normal heating at this time, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, thereby improving the user's heating experience and user comfort.

[0074] Optionally, the air conditioner controls the switching states of the main solenoid valve 20 and the bypass solenoid valve 21 to be one on and one off according to the temperature T1 of the heat storage device 6 and the temperature T3 of the liquid pipe solenoid valve 17, including: when T1≤T3, the air conditioner controls the main solenoid valve 20 to open and the bypass solenoid valve 21 to close, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrost branch flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the liquid pipe solenoid valve 17, the main solenoid valve 20, the three-way valve 26, the second outdoor heat exchanger 5, the first outdoor heat exchanger 4, the four-way valve 3 in sequence, and then flows back to the compressor 1. In the case of T1>T3, the air conditioner controls the main solenoid valve 20 to close and the bypass solenoid valve 21 to open, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange defrost branch flows through the compressor 1, the four-way valve 3, the indoor heat exchanger, the liquid pipe solenoid valve 17, the bypass solenoid valve 21, the three-way valve 26, the second outdoor heat exchanger 5, the first outdoor heat exchanger 4, and the four-way valve 3 in sequence and then flows back to the compressor 1. In this way, when the air conditioner is running in the heating high-pressure liquid pipe waste heat storage device heat defrosting mode, if the temperature of the heat storage device 6 is higher than the temperature of the liquid pipe solenoid valve 17 in the high-pressure liquid refrigerant branch, the heat storage main solenoid valve 20 is opened and the heat storage bypass solenoid valve 21 is closed, so that the refrigerant in the high-pressure liquid refrigerant branch flows through the heat storage device 6 and then enters the heat exchange defrost branch, obtains the heat of the heat storage device 6, and uses the heat storage device 6 and the liquid pipe waste heat to defrost at the same time, thereby increasing the heating capacity of the air conditioner and achieving better defrosting. If the temperature of the heat storage device 6 is low, lower than the temperature of the liquid pipe solenoid valve 17 in the high-pressure liquid refrigerant branch, the main solenoid valve 20 is closed and the bypass solenoid valve 21 is opened, so that the refrigerant in the high-pressure liquid refrigerant branch does not flow through the heat storage device 6 and directly enters the heat exchange defrost branch, without obtaining the heat of the heat storage device 6, and only uses the residual heat of the liquid pipe for defrosting, without additionally increasing the heating capacity of the air conditioner. By controlling the switch of the main solenoid valve 20 and the bypass solenoid valve 21 according to the temperature of the liquid pipe solenoid valve 17, it is helpful to determine whether the refrigerant in the high-pressure liquid refrigerant branch flows through the heat storage device 6 and then enters the heat exchange defrost branch when the air conditioner is defrosted, which is helpful to increase the heating capacity of the air conditioner and achieve better defrosting, or, without additionally increasing the heating capacity of the air conditioner. It is helpful to improve the user's heating experience.

[0075] Optionally, the air conditioner controls the on and off of the four-way valve 3, the three-way valve 26, the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 according to the operating mode of the air conditioner, including: when the operating mode of the air conditioner is the heating reverse cycle defrost mode, the air conditioner controls the first end of the four-way valve 3 to be connected with the second end, the third end to be connected with the fourth end, the first end to the second end of the three-way valve 26 to be connected, and the air pipe solenoid valve 16, the liquid pipe solenoid valve 17, the main solenoid valve 20 and the bypass solenoid valve 21 to be closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor 1, the four-way valve 3, the first outdoor heat exchanger 4, the indoor heat exchanger, the four-way valve 3 in sequence, and then flows back to the compressor 1, and the refrigerant in the heat exchange and defrost branch flows through the compressor 1, the four-way valve 3, the three-way valve 26, the second outdoor heat exchanger 5, the indoor heat exchanger, the four-way valve 3 in sequence, and then flows back to the compressor 1. In this way, when the air conditioner is running in the heating reverse cycle defrosting mode, the heating amount and defrosting strength required for defrosting are the largest, and the refrigerant after heat exchange does not enter the heat exchange defrosting branch and the heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch, but the refrigerant from the compressor 1 enters the heat exchange defrosting branch. The indoor heat exchanger acts as the system evaporator, and the first outdoor heat exchanger 4 and the second outdoor heat exchanger 5 both release heat to defrost and act as condensers.

[0076] Combination Figure 6 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0077] S601, the air conditioner determines the operation mode of the air conditioner.

[0078] S602, when the operating mode of the air conditioner is the conventional cooling mode, the air conditioner controls the first end of the four-way valve to be connected with the second end, the third end to be connected with the fourth end, the first end to the second end of the three-way valve to be connected, and the gas pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are closed.

[0079] S603, when the operating mode of the air conditioner is the heating and frost-free mode, the air conditioner controls the first end of the four-way valve to be connected with the third end, the second end to be connected with the fourth end, the first end to the second end of the three-way valve to be connected, and the gas pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are closed.

[0080] S604, when the operation mode of the air conditioner is the defrost mode of the heating high-pressure air pipe exhaust sensible heat storage device, the air conditioner controls the air pipe solenoid valve to open, the liquid pipe solenoid valve to close, the first end and the third end of the three-way valve are connected, the first end and the third end of the four-way valve are connected, and the second end and the fourth end are connected.

[0081] S605, the air conditioner controls the switch states of the main solenoid valve and the bypass solenoid valve to be one open and one closed according to the temperature T1 of the heat storage device and the temperature T2 of the gas pipe solenoid valve.

[0082] S606, when the operation mode of the air conditioner is the heating high-pressure liquid pipe waste heat storage device heat defrost mode, the air conditioner controls the first end of the four-way valve to be connected with the third end, the second end to be connected with the fourth end, the first end to the third end of the three-way valve to be connected, the liquid pipe solenoid valve is opened, and the gas pipe solenoid valve is closed.

[0083] S607, the air conditioner controls the switch states of the main solenoid valve and the bypass solenoid valve to be one open and one closed according to the temperature T1 of the heat storage device and the temperature T3 of the liquid pipe solenoid valve.

[0084] S608, when the operating mode of the air conditioner is the heating reverse cycle defrost mode, the air conditioner controls the first end of the four-way valve to be connected with the second end, the third end to be connected with the fourth end, the first end to the second end of the three-way valve to be connected, and the gas pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve are closed.

[0085] Using the method for controlling an air conditioner provided by the embodiment of the present disclosure, when the operating mode of the air conditioner is a conventional cooling mode, the refrigerant after heat exchange does not pass through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch. The first outdoor heat exchanger and the second outdoor heat exchanger of the heat exchange defrost branch both release heat and act as a condenser, and the indoor heat exchanger absorbs heat and acts as an evaporator. At this time, the heat exchange defrost branch is not used for defrosting. Under the action of the outdoor fan, the airflow passes through the second outdoor heat exchanger and the first outdoor heat exchanger in sequence to release heat from the air. This is conducive to better heat release by the outdoor heat exchanger and improves the cooling experience of the air conditioner. When the air conditioner is running in a heating frost-free mode, the system re-runs the refrigerant without passing through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch. The refrigerant coming out of the indoor heat exchanger of the high-pressure liquid refrigerant branch enters the heat exchange defrost branch. The indoor heat exchanger releases heat and acts as a condenser, and the first outdoor heat exchanger and the second outdoor heat exchanger both absorb heat and act as an evaporator. Under the action of the outdoor fan, the airflow passes through the second outdoor heat exchanger and the first outdoor heat exchanger in turn to absorb heat from the air. At this time, the heat exchange defrost branch is used to obtain heat from the environment to improve the user's heating experience and improve the user's comfort. When the air conditioner runs the defrosting mode of the heating high-pressure air pipe exhaust sensible heat storage device, the heating amount and defrosting force required for defrosting are large, and the refrigerant enters the heat exchange defrost branch and / or the heat storage branch through the high-pressure gaseous refrigerant branch. The indoor heat exchanger releases heat and acts as a condenser. The first outdoor heat exchanger absorbs heat and acts as an evaporator. Since the second outdoor heat exchanger has a high-temperature gaseous refrigerant entering through the high-pressure gaseous refrigerant branch, the frost on the surface of the second outdoor heat exchanger can be melted, and the inlet air temperature of the first outdoor heat exchanger can be heated, thereby realizing the defrosting of the first outdoor heat exchanger. Since the indoor heat exchanger and the first outdoor heat exchanger can achieve normal heating at this time, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved. When the air conditioner is running in the heat defrosting mode of the heat storage device of the heating high-pressure liquid pipe, the heating amount and defrosting force required for defrosting are small, and the refrigerant after heat exchange enters the heat exchange defrosting branch and / or the heat storage branch through the high-pressure liquid refrigerant branch. The indoor heat exchanger is controlled to release heat and act as a condenser. The first outdoor heat exchanger is controlled to absorb heat and act as an evaporator. Since the second outdoor heat exchanger is controlled to have a high-temperature liquid refrigerant entering through the high-pressure liquid refrigerant branch, the frost on the surface of the second outdoor heat exchanger can be melted, and the inlet air temperature of the first outdoor heat exchanger can be heated, thereby achieving defrosting of the first outdoor heat exchanger. Since the indoor heat exchanger and the first outdoor heat exchanger can achieve normal heating at this time, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.When the air conditioner is running in the heating reverse cycle defrosting mode, the heating amount and defrosting intensity required for defrosting are the largest. The refrigerant that has completed the heat exchange does not enter the heat exchange defrosting branch and the heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch, but the refrigerant coming out of the compressor enters the heat exchange defrosting branch. The indoor heat exchanger acts as the system evaporator, and the first outdoor heat exchanger and the second outdoor heat exchanger both release heat to defrost and act as condensers. In this way, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0086] Combination Figure 7 As shown, the embodiment of the present disclosure provides a device 200 for controlling an air conditioner, including a determination module 701 and a control module 702. The determination module 701 is configured to determine the operation mode of the air conditioner. The control module 702 is configured to control the on-off of the four-way valve, the three-way valve, the gas pipe solenoid valve, and the liquid pipe solenoid valve according to the operation mode of the air conditioner, so as to enable the air conditioner to operate in a frost-free or defrosting manner.

[0087] The device for controlling the air conditioner provided by the embodiment of the present disclosure is used. By setting a heat exchange defrost branch including a second outdoor heat exchanger and a three-way valve, the first outdoor heat exchanger and the second heat exchanger in the refrigerant circulation loop obtain heat in the initial stage. After the system setting conditions are met, the refrigerant can enter the heat exchange defrost branch and / or the heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to achieve defrosting of the second outdoor heat exchanger, and the heat in the second outdoor heat exchanger and the heat storage branch heats the inlet air temperature of the first outdoor heat exchanger. The heat storage branch allows the refrigerant in the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch to flow through the heat storage device and then enter the heat exchange defrost branch, obtaining the heat of the heat storage device when the air conditioner is defrosted, thereby increasing the heating capacity of the air conditioner and achieving better defrosting. Controlling the on and off of the four-way valve, three-way valve, gas pipe solenoid valve, and liquid pipe solenoid valve according to the operation mode of the air conditioner is conducive to switching the refrigerant flow direction in the first outdoor heat exchanger and the second outdoor heat exchanger, and can make the refrigerant that has completed heat exchange enter the heat exchange defrosting branch and / or heat storage branch through the high-pressure gaseous refrigerant branch or the high-pressure liquid refrigerant branch. Therefore, when the air conditioner is defrosted, the impact on the heating capacity of the air conditioner is reduced, the user's heating experience is improved, and the user's comfort is improved.

[0088] Combination Figure 8As shown, the embodiment of the present disclosure provides a device 300 for controlling an air conditioner, including a processor 800 and a memory 801. Optionally, the device may also include a communication interface 802 and a bus 803. The processor 800, the communication interface 802, and the memory 801 may communicate with each other through the bus 803. The communication interface 802 may be used for information transmission. The processor 800 may call the logic instructions in the memory 801 to execute the method for controlling the air conditioner of the above embodiment.

[0089] In addition, the logic instructions in the memory 801 described above can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0090] The memory 801 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 800 executes the function application and data processing by running the program instructions / modules stored in the memory 801, that is, the method for controlling the air conditioner in the above embodiment is implemented.

[0091] The memory 801 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 801 may include a high-speed random access memory and may also include a non-volatile memory.

[0092] Combination Fig. 9 As shown, an embodiment of the present disclosure provides an air conditioner 100, including: an air conditioner body, and the above-mentioned device 200 (300) for controlling the air conditioner. The device 200 (300) for controlling the air conditioner is installed in the air conditioner body. The installation relationship described here is not limited to placement inside the air conditioner, but also includes installation connections with other components of the air conditioner, including but not limited to physical connection, electrical connection or signal transmission connection, etc. It can be understood by those skilled in the art that the device 200 (300) for controlling the air conditioner can be adapted to a feasible air conditioner body, thereby realizing other feasible embodiments.

[0093] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

[0094] The computer-readable storage medium mentioned above may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0095] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transient storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes, or a transient storage medium.

[0096] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operation may vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of listings containing one or more associated ones. In addition, when used in the present application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method or device comprising the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0097] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0098] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple 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 each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0099] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. An air conditioner, characterized in that: include: A refrigerant circulation loop includes: a compressor, a four-way valve, a first outdoor heat exchanger, and an indoor heat exchanger, wherein a first end of the four-way valve is connected to a first end of the compressor, a second end is connected to a first end of the first outdoor heat exchanger, a third end is connected to a first end of the indoor heat exchanger, and a fourth end is connected to a second end of the compressor; The heat exchange defrosting branch includes a second outdoor heat exchanger and a three-way valve, wherein a first end of the second outdoor heat exchanger is connected to a first end of the three-way valve, a second end of the second outdoor heat exchanger is connected to a second end of the indoor heat exchanger, and a second end of the three-way valve is connected to a first end of the first outdoor heat exchanger; A high-pressure gaseous refrigerant branch includes an air pipe solenoid valve, a first end of the air pipe solenoid valve is connected to a first end of the compressor, and a second end is connected to a third end of the three-way valve; and / or, The high-pressure liquid refrigerant branch includes a liquid pipe solenoid valve, a first end of the liquid pipe solenoid valve is connected to the second end of the indoor heat exchanger, and a second end is connected to the third end of the three-way valve.

2. The air conditioner according to claim 1, characterized in that: Also includes: The heat storage branch, the gas pipe solenoid valve and / or the liquid pipe solenoid valve are connected to the third end of the three-way valve through the heat storage branch.

3. The air conditioner according to claim 2, characterized in that: The heat storage branch also includes: Heat storage device; A heat storage main path, wherein the heat storage device is arranged on the heat storage main path; and, Bypass branch, the bypass branch is connected in parallel with the heat storage main road.

4. The air conditioner according to claim 3, characterized in that: The heat storage branch also includes: A main solenoid valve is arranged on the heat storage main circuit, and the main solenoid valve controls the on and off of the heat storage main circuit; The bypass solenoid valve is arranged on the bypass branch, and the bypass solenoid valve controls the on-off of the bypass branch.

5. A method for controlling an air conditioner, characterized in that: The air conditioner as claimed in claim 4 comprises: Determine the operating mode of the air conditioner; According to the operation mode of the air conditioner, the on and off of the four-way valve, three-way valve, gas pipe solenoid valve, liquid pipe solenoid valve, main solenoid valve and bypass solenoid valve are controlled to enable the air conditioner to achieve frost-free operation or defrosting operation.

6. The method according to claim 5, characterized in that Determine the air conditioner's operating mode, including: Make sure the air conditioner is in normal cooling mode; or, According to the pipe temperature of the first outdoor heat exchanger, the heating mode type of the air conditioner is determined as a heating frost-free mode, a heating reverse cycle defrost mode, a heating high-pressure gas pipe exhaust sensible heat storage device defrost mode, and a heating high-pressure liquid pipe waste heat storage device defrost mode.

7. The method according to claim 5, characterized in that According to the operation mode of the air conditioner, the on and off of the four-way valve, three-way valve, gas pipe solenoid valve, liquid pipe solenoid valve, main solenoid valve and bypass solenoid valve are controlled, including: When the operation mode of the air conditioner is the defrosting mode of the high-pressure gas pipe exhaust sensible heat storage device for heating, the gas pipe solenoid valve is controlled to be opened, the liquid pipe solenoid valve is closed, the first end and the third end of the three-way valve are connected, the first end and the third end of the four-way valve are connected, and the second end and the fourth end are connected, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the indoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence, and then flows back to the compressor; According to the temperature T1 of the heat storage device and the temperature T2 of the gas pipe solenoid valve, the switching states of the main solenoid valve and the bypass solenoid valve are controlled to be open and closed, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange and defrost branch flows through the compressor, the gas pipe solenoid valve, the main solenoid valve or the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor.

8. The air conditioner according to claim 7, characterized in that: According to the temperature T1 of the heat storage device and the temperature T2 of the gas pipe solenoid valve, the switch states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off, including: When T1≥T2, the main solenoid valve is controlled to open and the bypass solenoid valve is closed, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange defrost branch flows through the compressor, the gas pipe solenoid valve, the main solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve and then flows back to the compressor; When T1<T2, the main solenoid valve is controlled to close and the bypass solenoid valve is opened, so that the refrigerant in the high-pressure gaseous refrigerant branch and the heat exchange defrost branch flows through the compressor, the gas pipe solenoid valve, the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve and then flows back to the compressor.

9. The method according to claim 5, characterized in that According to the operation mode of the air conditioner, the on and off of the four-way valve, three-way valve, gas pipe solenoid valve, liquid pipe solenoid valve, main solenoid valve and bypass solenoid valve are controlled, including: When the operation mode of the air conditioner is the heating high-pressure liquid pipe waste heat storage device heat defrosting mode, the first end of the four-way valve is controlled to be connected to the third end, the second end is controlled to be connected to the fourth end, the first end of the three-way valve is controlled to be connected to the third end, the liquid pipe solenoid valve is opened, and the gas pipe solenoid valve is closed, so that the refrigerant in the refrigerant circulation loop flows through the compressor, the four-way valve, the indoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence, and then flows back to the compressor; According to the temperature T1 of the heat storage device and the temperature T3 of the liquid pipe solenoid valve, the switching states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrost branch flows through the compressor, the four-way valve, the indoor heat exchanger, the liquid pipe solenoid valve, the main solenoid valve or the bypass solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor.

10. The method according to claim 9, characterized in that According to the temperature T1 of the heat storage device and the temperature T3 of the liquid pipe solenoid valve, the switch states of the main solenoid valve and the bypass solenoid valve are controlled to be one on and one off, including: When T1≤T3, the main solenoid valve is controlled to open and the bypass solenoid valve is closed, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrosting branch flows through the compressor, the four-way valve, the indoor heat exchanger, the liquid pipe solenoid valve, the main solenoid valve, the three-way valve, the second outdoor heat exchanger, the first outdoor heat exchanger, the four-way valve in sequence and then flows back to the compressor; When T1>T3, the main solenoid valve is controlled to close and the bypass solenoid valve is opened, so that the refrigerant in the high-pressure liquid refrigerant branch and the heat exchange and defrost branch flows through the compressor, four-way valve, indoor heat exchanger, liquid pipe solenoid valve, bypass solenoid valve, three-way valve, second outdoor heat exchanger, first outdoor heat exchanger, four-way valve and then flows back to the compressor.

11. A device for controlling an air conditioner, characterized in that: The air conditioner as claimed in claim 4 comprises: a determination module configured to determine an operation mode of the air conditioner; The control module is configured to control the on and off of the four-way valve, the three-way valve, the gas pipe solenoid valve, the liquid pipe solenoid valve, the main solenoid valve and the bypass solenoid valve according to the operation mode of the air conditioner to enable the air conditioner to operate in a frost-free or defrosting manner.

12. A device for controlling an air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling an air conditioner according to any one of claims 5 to 10 when running the program instructions.

13. An air conditioner, characterized in that: include: The air conditioner body comprises: a refrigerant circulation circuit, comprising: a compressor, a four-way valve, a first outdoor heat exchanger, and an indoor heat exchanger, wherein the first end of the four-way valve is connected to the first end of the compressor, the second end is connected to the first end of the first outdoor heat exchanger, the third end is connected to the first end of the indoor heat exchanger, and the fourth end is connected to the second end of the compressor; a heat exchange defrosting branch, comprising a second outdoor heat exchanger and a three-way valve, wherein the first end of the second outdoor heat exchanger is connected to the first end of the three-way valve, the second end is connected to the second end of the indoor heat exchanger, and the second end of the three-way valve is connected to the first end of the first outdoor heat exchanger; a high-pressure gaseous refrigerant branch, comprising an air pipe solenoid valve, wherein the first end of the air pipe solenoid valve is connected to the first end of the compressor, and the second end is connected to the third end of the three-way valve; and / or, a high-pressure liquid refrigerant branch, comprising a liquid pipe solenoid valve, wherein the first end of the liquid pipe solenoid valve is connected to the second end of the indoor heat exchanger, and the second end is connected to the third end of the three-way valve; The device for controlling an air conditioner according to claim 11 or 12 is installed on the air conditioner body.

14. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling an air conditioner according to any one of claims 5 to 10 is executed.

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