Heat pump air conditioning system waste heat recovery method and device, air conditioner and storage medium

Abstract

The invention discloses a waste heat recovery method and device of a heat pump air conditioning system, an air conditioner and a storage medium, and relates to the technical field of air conditioners, and the waste heat recovery method of the heat pump air conditioning system comprises the steps that when the air conditioner is in a heating mode, the working states of an electromagnetic valve and a reversing device are controlled; a connecting loop of the waste heat collecting heat exchanger is adjusted according to the working state so that waste heat can be recycled through the waste heat collecting heat exchanger, the function of the waste heat collecting heat exchanger can be changed in different modes by changing the connecting loop of the waste heat collecting heat exchanger, and heat needed by low-temperature refrigerant evaporation is provided; the part of energy is used for increasing the indoor air temperature, and the waste heat recovery and energy saving effects are achieved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a waste heat recovery method, device, air conditioner and storage medium for a heat pump air conditioning system. Background Art

[0002] In the heating mode of the existing heat pump air conditioning system, the compressor and the electronic control box generate a large amount of waste heat that is dissipated into the air, causing the ambient temperature to be too high, posing the risk of equipment failure, and the heat cannot be utilized. In the heating mode, without any change to the system structure, the flow direction of the refrigerant is changed by the four-way reversing valve, so that the outdoor heat exchanger acts as a condenser and the indoor heat exchanger acts as an evaporator. After absorbing the indoor heat, the refrigerant is compressed into high-temperature and high-pressure steam for defrosting. Although the four-way valve reversing method can be used for defrosting, the indoor heating effect is sacrificed, and it often happens that even if the electric auxiliary heating is turned on, the room temperature cannot be maintained, which seriously affects the comfort of the indoor environment. In addition, the noise and vibration of the compressor under high-frequency use will not only reduce the user experience, but also cause certain safety hazards. Summary of the invention

[0003] The main purpose of the present application is to provide a waste heat recovery method, device, air conditioner and storage medium for a heat pump air conditioning system, aiming to solve the technical problem that the heat pump air conditioning system cannot realize waste heat recovery and has poor energy saving effect.

[0004] To achieve the above-mentioned purpose, the present application proposes a waste heat recovery method for a heat pump air conditioning system, which is applied to a heat pump air conditioning system, wherein the heat pump air conditioning system comprises: a compressor, an indoor heat exchanger, a first throttle valve, a solenoid valve and an electric control box which are sequentially connected to form a loop through a reversing device, wherein the indoor heat exchanger is also sequentially connected to an outdoor heat exchanger and a compressor through the reversing device, and the indoor heat exchanger is also connected to a second throttle valve, a waste heat collection heat exchanger and the compressor through the reversing device;

[0005] The method comprises:

[0006] When the air conditioner is in heating mode, controlling the working states of the solenoid valve and the reversing device;

[0007] The connection circuit of the waste heat collection heat exchanger is adjusted according to the working state to recover waste heat through the waste heat collection heat exchanger.

[0008] In one embodiment, when the air conditioner is in heating mode, the step of controlling the working state of the solenoid valve and the reversing device comprises:

[0009] When the air conditioner is in heating mode, obtain the condenser temperature;

[0010] The working states of the solenoid valve and the reversing device are controlled according to the temperature of the condenser.

[0011] In one embodiment, the reversing device includes: a first three-way valve, a second three-way valve and a third three-way valve, one end of the first three-way valve is connected to the first throttle valve, the other end of the first three-way valve is respectively connected to the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger, the waste heat collection heat exchanger is connected to the compressor through the second three-way valve, and the outdoor heat exchanger and the electric control box are connected to the compressor through the third three-way valve;

[0012] The step of controlling the working state of the solenoid valve and the reversing device according to the condenser temperature comprises:

[0013] When the condenser temperature is greater than a preset temperature threshold, determining that the air conditioner is not in a defrost mode;

[0014] When the air conditioner is not in defrost mode, the solenoid valve is opened, the valves of the first three-way valve controlling the reversing device are all opened, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed.

[0015] In one embodiment, the step of controlling the working state of the solenoid valve and the reversing device according to the condenser temperature includes:

[0016] When the condenser temperature is less than or equal to the preset temperature threshold, determining that the air conditioner is in the defrost mode;

[0017] When the air conditioner is in the defrosting mode, the solenoid valve is closed, and the second valve of the first three-way valve and the third valve of the second three-way valve of the reversing device are controlled to be closed.

[0018] In one embodiment, the step of adjusting the connection circuit of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger includes:

[0019] When the working state is that the solenoid valve is open, the valves of the first three-way valve are all open, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed, the connection circuit of the waste heat collection heat exchanger is adjusted so that the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger are connected in parallel;

[0020] Heat is absorbed by the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger respectively, so that waste heat is recovered by the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger.

[0021] In one embodiment, the step of adjusting the connection circuit of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger includes:

[0022] When the working state is that the solenoid valve is closed, the second valve of the first three-way valve is closed, and the third valve of the third three-way valve is closed, the connection circuit of the waste heat collection heat exchanger is adjusted so that the waste heat collection heat exchanger is connected in series with the outdoor heat exchanger;

[0023] Heat is absorbed by the waste heat collection heat exchanger, and heat is released by the outdoor heat exchanger to perform defrosting treatment, so that waste heat can be recovered by the waste heat collection heat exchanger.

[0024] In one embodiment, the method further comprises:

[0025] When the air conditioner is in cooling mode, the solenoid valve is opened, the second valve and the third valve of the first three-way valve in the reversing device are controlled to be closed, and the third valve of the third three-way valve is closed;

[0026] The electric control box is controlled to be connected in series with the outdoor heat exchanger, and heat is absorbed by the outdoor heat exchanger to perform cooling.

[0027] In addition, to achieve the above-mentioned purpose, the present application also proposes a waste heat recovery device for a heat pump air conditioning system, the waste heat recovery device for a heat pump air conditioning system comprising:

[0028] A control module, used for controlling the working state of the solenoid valve and the reversing device when the air conditioner is in a heating mode;

[0029] The adjustment module is used to adjust the connection loop of the waste heat collection heat exchanger according to the working state, so as to recover the waste heat through the waste heat collection heat exchanger.

[0030] In addition, to achieve the above-mentioned purpose, the present application also proposes an air conditioner, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the waste heat recovery method of the heat pump air conditioning system as described above.

[0031] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the waste heat recovery method of the heat pump air-conditioning system as described above are implemented.

[0032] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the waste heat recovery method of the heat pump air-conditioning system as described above.

[0033] One or more technical solutions proposed in the present application, a waste heat recovery method for a heat pump air-conditioning system is applied to a heat pump air-conditioning system, the system includes a compressor, an indoor heat exchanger, a first throttle valve, a solenoid valve and an electronic control box which are connected in sequence to form a loop through a reversing device, the indoor heat exchanger is also connected in sequence with the outdoor heat exchanger and the compressor through a reversing device, the indoor heat exchanger is also connected with the second throttle valve, the waste heat collection heat exchanger and the compressor through a reversing device, the method includes: when the air conditioner is in a heating mode, controlling the working state of the solenoid valve and the reversing device; adjusting the connection loop of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger, by changing the connection loop of the waste heat collection heat exchanger, the function of the waste heat collection heat exchanger can be changed in different modes to provide the heat required for the evaporation of the low-temperature refrigerant, and using this part of energy to increase the indoor air temperature, thereby achieving waste heat recovery and energy-saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 A schematic diagram of a process flow diagram provided for the first embodiment of the waste heat recovery method for a heat pump air conditioning system of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of the heat pump air conditioning system of this application;

[0038] Figure 3 A schematic diagram of a process flow diagram provided for the second embodiment of the waste heat recovery method for a heat pump air conditioning system of the present application;

[0039] Figure 4 This is a schematic diagram of the flow of refrigerant through the pipelines in the system in the heating mode and not in the defrosting mode in one embodiment of the waste heat recovery method of the heat pump air conditioning system of the present application;

[0040] Figure 5This is a schematic diagram of the flow of refrigerant through the pipelines in the system in the heating mode and the defrosting mode in one embodiment of the waste heat recovery method of the heat pump air conditioning system of the present application;

[0041] Figure 6 This is a schematic diagram of the overall process in the heating mode in one embodiment of the waste heat recovery method of the heat pump air conditioning system of the present application;

[0042] Figure 7 A schematic diagram of a process flow diagram provided for the third embodiment of the waste heat recovery method for a heat pump air conditioning system of the present application;

[0043] Figure 8 This is a schematic diagram of the flow of refrigerant in the pipelines of the system in the cooling mode in one embodiment of the waste heat recovery method of the heat pump air conditioning system of the present application;

[0044] Fig. 9 This is a schematic diagram of the overall process in the cooling mode in one embodiment of the waste heat recovery method of the heat pump air conditioning system of the present application;

[0045] Fig.10 This is a schematic diagram of the module structure of a waste heat recovery device of a heat pump air conditioning system according to an embodiment of the present application;

[0046] Fig.11 Schematic diagram of the equipment structure of the hardware operating environment involved in the waste heat recovery method of the heat pump air conditioning system in the embodiment of the present application.

[0047] Description of Figure Numbers:

[0048] Compressor 20, indoor heat exchanger 30, first throttle valve 40, solenoid valve 50, electric control box 60, outdoor heat exchanger 70, second throttle valve 80, waste heat collection heat exchanger 90, centrifugal fan 100, indoor fan 110, outdoor fan 120;

[0049] A first one-way valve F1, a second one-way valve F2, a third one-way valve F3, a fourth one-way valve F4, and a fifth one-way valve F5;

[0050] A first three-way valve 101 , a second three-way valve 102 , a third three-way valve 103 , and a four-way valve 104 .

[0051] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0053] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0054] The main solution of the embodiment of the present application is: when the air conditioner is in heating mode, the working state of the solenoid valve and the reversing device is controlled; according to the working state, the connection circuit of the waste heat collection heat exchanger is adjusted to recover waste heat through the waste heat collection heat exchanger.

[0055] In the heating mode of the existing heat pump air conditioning system, the compressor and the electric control box generate a large amount of waste heat that is dissipated into the air and cannot be used, resulting in a reduction in the energy efficiency of the air conditioner. In addition, the heat pump air conditioner has poor heating performance, slow defrosting and high energy consumption under low temperature conditions. Although the frost problem under some low temperature conditions can be defrosted by reversing the four-way valve, the indoor heating effect is sacrificed. Even if the electric auxiliary heating is turned on, the room temperature cannot be maintained, which seriously affects the comfort of the indoor environment. In addition, the noise and vibration of the compressor under high-frequency use will not only reduce the user experience, but also cause certain safety hazards.

[0056] The present application provides a solution that utilizes waste heat collection technology to absorb the heat generated by the compressor and the electronic control box, and utilizes the collected waste heat to optimize the heat pump air-conditioning system. The waste heat collector continuously absorbs the heat generated by the compressor and the electronic control box, maintaining the surrounding temperature within an appropriate range, thereby avoiding equipment failure of the compressor and the electronic control box in a continuous high temperature environment to a certain extent.

[0057] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, a heat pump air conditioning system, etc. The following takes the heat pump air conditioning system as an example to illustrate this embodiment and the following embodiments.

[0058] Based on this, the present application embodiment provides a waste heat recovery method for a heat pump air conditioning system, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the waste heat recovery method of the heat pump air conditioning system of the present application.

[0059] In this embodiment, the waste heat recovery method of the heat pump air conditioning system is applied to the heat pump air conditioning system, such as Figure 2 As shown, the heat pump air conditioning system includes: a compressor 20, an indoor heat exchanger 30, a first throttle valve 40, a solenoid valve 50 and an electric control box 60 which are sequentially connected to form a loop through a reversing device, the indoor heat exchanger 30 is also sequentially connected to an outdoor heat exchanger 70 and the compressor 20 through the reversing device, and the indoor heat exchanger 30 is also connected to a second throttle valve 80, a waste heat collection heat exchanger 90 and the compressor 20 through the reversing device;

[0060] It should be noted that the reversing device includes a three-way valve and a four-way valve. The reversing device is arranged on each circuit of the heat pump air conditioning system and can adjust the connection relationship between the components on the circuit.

[0061] The waste heat collection heat exchanger 90 is installed above the compressor 20 and can collect the air generated around the compressor 20. The heat pump air conditioning system also includes a centrifugal fan 100, an indoor fan 110, an outdoor fan 120 and a plurality of one-way valves, the one-way valves including a first one-way valve F1, a second one-way valve F2, a third one-way valve F3, a fourth one-way valve F4 and a fifth one-way valve F5. The fan is used to compress and transport gas.

[0062] In a specific implementation, the reversing device includes: a first three-way valve 101, a second three-way valve 102, a third three-way valve 103 and a four-way valve 104, one end of the first three-way valve 101 is connected to the first throttle valve 40, and the other end of the first three-way valve 101 is respectively connected to the waste heat collection heat exchanger 90, the electric control box 60 and the outdoor heat exchanger 70, the waste heat collection heat exchanger 90 is connected to the compressor 20 through the second three-way valve 102, and the outdoor heat exchanger 70 and the electric control box 60 are connected to the compressor 20 through the third three-way valve 103. The four-way valve 104 is provided between the compressor 20 and the indoor heat exchanger 30.

[0063] The waste heat recovery method of the heat pump air conditioning system comprises steps S10 to S20:

[0064] Step S10: When the air conditioner is in the heating mode, the working states of the solenoid valve and the reversing device are controlled.

[0065] It should be noted that when the air conditioner is in heating mode, the compressor and the electronic control box generate a large amount of waste heat which is dissipated into the air. At this time, the working states of the solenoid valve and the reversing device are controlled according to the heating mode. The working state of the solenoid valve can be open or closed, and the working state of the reversing device can include the working state of each valve in the four-way valve and the three-way valve.

[0066] Step S20: adjusting the connection loop of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger.

[0067] It can be understood that in the heating mode of this embodiment, a large amount of waste heat generated by the compressor and the electronic control box can be recovered through the action of the waste heat collection heat exchanger, so the connection loop of the waste heat collection heat exchanger can be adjusted to recover the waste heat.

[0068] The present embodiment provides a waste heat recovery method for a heat pump air-conditioning system, which is applied to a heat pump air-conditioning system. The system includes a compressor, an indoor heat exchanger, a first throttle valve, a solenoid valve and an electric control box which are sequentially connected to form a loop through a reversing device. The indoor heat exchanger is also sequentially connected to the outdoor heat exchanger and the compressor through the reversing device. The indoor heat exchanger is also connected to the second throttle valve, the waste heat collection heat exchanger and the compressor through the reversing device. The method includes: when the air conditioner is in a heating mode, controlling the working state of the solenoid valve and the reversing device; adjusting the connection loop of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger. By changing the connection loop of the waste heat collection heat exchanger, the function of the waste heat collection heat exchanger can be changed in different modes to provide the heat required for the evaporation of the low-temperature refrigerant. This part of energy is used to increase the indoor air temperature, thereby achieving waste heat recovery and energy-saving effects.

[0069] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 3 , step S10 includes steps S101 to S102:

[0070] Step S101: when the air conditioner is in heating mode, obtain the condenser temperature.

[0071] It is understandable that when the air conditioner is in heating mode, it is necessary to first determine whether the outdoor heat exchanger is frosted. The corresponding device connection relationships are different when the outdoor heat exchanger is frosted or not. Therefore, the condenser temperature can be obtained first to determine whether the outdoor heat exchanger is frosted. The condenser temperature can be detected by a temperature sensor set on the condenser tube.

[0072] Step S102: Control the working states of the solenoid valve and the reversing device according to the condenser temperature.

[0073] In a specific implementation, whether the air conditioner needs to be defrosted, that is, whether it is in the defrost mode, can be determined based on the condenser temperature. When the air conditioner is in the defrost mode, the working state of the solenoid valve and the reversing device is different from the working state when the air conditioner is not in the defrost mode, and the connection relationship of the corresponding waste heat collection heat exchanger is also different.

[0074] In a feasible implementation, step S102 may include steps A11 to A12:

[0075] Step A11: when the condenser temperature is greater than a preset temperature threshold, determining that the air conditioner is not in a defrost mode.

[0076] It can be understood that the preset temperature threshold is the critical value for frosting of the air conditioner. The preset temperature threshold can be set to 0 degrees Celsius, -5 degrees Celsius, etc. The preset temperature threshold can be determined and adjusted according to the working conditions.

[0077] In a specific implementation, the condenser temperature can be compared with a preset temperature threshold to determine whether the air conditioner is in defrost mode. If the condenser temperature is greater than the preset temperature threshold, it is determined that the air conditioner is in defrost mode. If the condenser temperature is less than or equal to the preset temperature threshold, it is determined that the air conditioner is not in defrost mode.

[0078] Step A12: When the air conditioner is not in the defrost mode, the solenoid valve is opened, the first three-way valves of the control reversing device are all opened, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed.

[0079] In a specific implementation, if the air conditioner is not in defrost mode, the waste heat collection heat exchanger can be turned on. Specifically, the four-way valve is powered on, and the compressor of the heat pump air-conditioning system compresses the high-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant; it is condensed through the indoor heat exchanger and heat exchanged with the indoor air. The indoor air temperature rises and the refrigerant temperature drops, becoming a low-temperature and high-pressure liquid refrigerant. At this time, the solenoid valve and all valves in the first three-way valve are opened, the first valve (port B) in the second solenoid valve is closed, the first valve (port B) of the third three-way valve is closed, and the second throttle valve is fully opened.

[0080] In a feasible implementation manner, under the above state, step S20 includes steps S201 to S202:

[0081] Step S201: When the working state is that the solenoid valve is open, the valves of the first three-way valve are all open, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed, adjust the connection circuit of the waste heat collection heat exchanger so that the waste heat collection heat exchanger, the electrical control box and the outdoor heat exchanger are connected in parallel.

[0082] Step S202: absorbing heat through the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger respectively, so as to recover waste heat through the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger.

[0083] It can be understood that when the solenoid valve is opened, the valves of the first three-way valve are all opened, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed, the refrigerant is diverted through the built-in pipeline of the electronic control box, the outdoor heat exchanger and the waste heat collection heat exchanger, and exchanges heat with the outdoor gas and the high-temperature air around the compressor and the electronic control box. The temperature of the outdoor air and the air around the compressor and the electronic control box decreases, and the temperature of the refrigerant increases, becoming a high-temperature, low-pressure gaseous refrigerant and entering the next round of heating cycle.

[0084] When the outdoor heat exchanger is frost-free in heating mode, the built-in pipelines of the electric control box and the waste heat collection heat exchanger are connected in parallel with the outdoor heat exchanger. The electric control box, the waste heat collection heat exchanger and the outdoor heat exchanger act as evaporators to jointly provide the heat required for the evaporation of the low-temperature refrigerant, thereby broadening the low-temperature operating ambient temperature range of the heat pump air-conditioning system and further improving the thermal efficiency of the heat pump air-conditioning system. By installing the waste heat collection heat exchanger and the built-in pipelines of the electric control box above the compressor, the heat generated by the compressor and the electric control box can be absorbed, thereby avoiding equipment failures of the compressor and the electric control box due to continuous high temperature environments to a certain extent.

[0085] like Figure 4 As shown, Figure 4 Schematic diagram of the refrigerant flow through the pipeline in the system in heating mode and not in defrost mode. When the four-way valve is powered on, the compressor compresses the high-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant, which is condensed through the indoor heat exchanger and exchanges heat with the indoor air. The indoor air temperature rises, the refrigerant temperature drops, and becomes a low-temperature and high-pressure liquid refrigerant, which passes through the first throttle valve to become a low-temperature and low-pressure gaseous refrigerant; at this time, the solenoid valve is opened, all valves in the first three-way valve are opened, the B port valve in the second three-way valve and the B port valve in the third three-way valve are closed, and the second throttle valve is fully opened. The refrigerant is diverted through the built-in pipeline of the electric control box, the outdoor heat exchanger and the waste heat collection heat exchanger, and exchanges heat with the outdoor gas and the high-temperature air around the compressor and the electric control box. The temperature of the outdoor air and the air around the compressor and the electric control box decreases, and the temperature of the refrigerant increases, becoming a high-temperature and low-pressure gaseous refrigerant, entering the next round of heating cycle.

[0086] In a feasible implementation, step S102 may include steps A21 to A22:

[0087] Step A21: When the condenser temperature is less than or equal to the preset temperature threshold, determine that the air conditioner is in the defrost mode.

[0088] It is understandable that if the condenser temperature is less than or equal to the preset temperature threshold, the outdoor heat exchanger is frosted, and the air conditioner enters the defrost mode.

[0089] Step A22: When the air conditioner is in defrost mode, the solenoid valve is closed, and the second valve of the first three-way valve and the third valve of the second three-way valve of the reversing device are controlled to be closed.

[0090] It is understandable that when the air conditioner enters the defrost mode, the valve direction of the four-way valve needs to be switched. At this time, the solenoid valve is controlled to be closed, and the second valve (port A) of the first three-way valve and the third valve (port C) of the second three-way valve are closed. The compressor of the heat pump air conditioning system compresses the high-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant; condenses through the outdoor heat exchanger, exchanges heat with the outdoor air, the outdoor air temperature rises, and the refrigerant temperature drops, becoming a low-temperature and high-pressure liquid refrigerant; at this time, the solenoid valve, the valve A in the first three-way valve, and the valve C in the second three-way valve are closed, and the refrigerant passes through the second throttle valve to become a low-temperature and low-pressure gaseous refrigerant.

[0091] In a feasible implementation manner, under the above state, step S20 includes steps S201' to S202':

[0092] Step S201': when the working state is that the solenoid valve is closed, the second valve of the first three-way valve is closed, and the third valve of the third three-way valve is closed, adjusting the connection circuit of the waste heat collection heat exchanger so that the waste heat collection heat exchanger is connected in series with the outdoor heat exchanger;

[0093] Step S202': absorbing heat through the waste heat collection heat exchanger, releasing heat through the outdoor heat exchanger, and performing defrosting treatment to recover waste heat through the waste heat collection heat exchanger.

[0094] It should be noted that when the outdoor heat exchanger is frosted in the heating mode, the waste heat collection heat exchanger replaces the indoor heat exchanger as the evaporator in the heat pump air-conditioning system, providing the heat required for the evaporation of the low-temperature refrigerant. The outdoor heat exchanger acts as a condenser to achieve a heating effect, and uses the large amount of heat energy generated by the compressor to achieve rapid defrosting without absorbing heat from the indoor side or consuming extra energy. It has high comfort and energy saving.

[0095] Through the waste heat collection heat exchanger, heat is exchanged with the high-temperature air around the compressor, the ambient air temperature decreases, the refrigerant temperature increases, and becomes a high-temperature, low-pressure gaseous refrigerant, and enters the next defrosting cycle. For example, after running for a set time, such as 10 minutes, re-enter the process of detecting the condenser temperature and re-determine the relationship between the condenser temperature and the preset temperature threshold.

[0096] like Figure 5 As shown, Figure 5Schematic diagram of the refrigerant flow through the pipeline in the system in heating mode and defrost mode. The compressor of the heat pump air-conditioning system compresses the high-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant; it is condensed through the outdoor heat exchanger and heat exchanged with the outdoor air. The outdoor air temperature rises, the refrigerant temperature drops, and becomes a low-temperature and high-pressure liquid refrigerant. The four-way valve is switched, the solenoid valve is closed, the valve A in the first three-way valve and the valve C in the second three-way valve are closed, and the low-temperature and high-pressure liquid refrigerant passes through the second throttle valve to become a low-temperature and low-pressure gaseous refrigerant. It passes through the waste heat collection heat exchanger and exchanges heat with the high-temperature air around the compressor. The surrounding air temperature drops, the refrigerant temperature rises, and becomes a high-temperature and low-pressure gaseous refrigerant, entering the next round of defrost cycle.

[0097] like Figure 6 As shown, Figure 6 The overall process diagram of the heat pump air conditioning system waste heat recovery method in the heating mode is shown in the figure. When the air conditioner is in the heating mode, it is detected whether the condenser temperature T3 is greater than the preset temperature threshold value T3'. If so, the solenoid valve is turned on, the valve B in the second three-way valve and the valve B in the third three-way valve are closed, and the second throttle valve is controlled to be fully opened. At this time, the built-in pipeline of the electric control box, the waste heat collection heat exchanger and the outdoor heat exchanger are connected in parallel to act as an evaporator. The system operates stably to provide heat for the indoor room, and returns to the temperature comparison process again after running for 10 minutes. If the condenser temperature T3 is less than or equal to the preset temperature threshold value T3', the defrost mode is started. At this time, the valve direction of the four-way valve is switched, the solenoid valve, the valve A in the first three-way valve and the valve C in the second three-way valve are closed, and the waste heat collection heat exchanger replaces the indoor heat exchanger to act as an evaporator. The outdoor heat exchanger releases heat as a condenser to defrost, and returns to the temperature comparison process after running for 10 minutes.

[0098] In this embodiment, when the air conditioner is in heating mode, the condenser temperature is obtained; the working states of the solenoid valve and the reversing device are controlled according to the condenser temperature, and by changing the working states of the solenoid valve and the reversing device, the connection circuit of the waste heat collection heat exchanger in different modes can be adjusted to improve the waste heat recovery effect.

[0099] Based on the first embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the first and second embodiments above can be referred to the above introduction, and will not be described in detail later. Figure 7 The waste heat recovery method of the heat pump air conditioning system further includes steps S30 to S40:

[0100] Step S30: when the air conditioner is in cooling mode, the solenoid valve is opened, the second valve and the third valve of the first three-way valve in the control reversing device are closed, and the third valve of the third three-way valve is closed.

[0101] In a specific implementation, when the air conditioner is in cooling mode, the compressor of the heat pump air conditioning system compresses the high-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant; it is condensed through the outdoor heat exchanger and heat exchanged with the outdoor air. The outdoor air temperature rises and the refrigerant temperature drops, becoming a low-temperature and high-pressure liquid refrigerant. At this time, the solenoid valve is opened, and the second valve (port A) and the third valve (port C) in the first three-way valve and the third valve (port C) in the second three-way valve are closed, so that the low-temperature refrigerant passes through the built-in pipe in the electronic control box, absorbs the heat generated by the electronic control box, and controls its temperature within an appropriate range; it passes through the first throttle valve to become a low-temperature and low-pressure gaseous refrigerant.

[0102] Step S40: Control the electric control box to be connected in series with the outdoor heat exchanger, and absorb heat through the outdoor heat exchanger to perform cooling.

[0103] In the specific implementation, the built-in pipeline of the electric control box is connected in series with the outdoor heat exchanger. The refrigerant becomes low-temperature refrigerant after passing through the outdoor heat exchanger, and then flows into the built-in pipeline of the electric control box to absorb heat and reduce the temperature of the electric control box. Through the indoor heat exchanger, it exchanges heat with the indoor gas, the indoor air temperature decreases, and the refrigerant temperature increases, becoming a high-temperature and low-pressure gaseous refrigerant, entering the next round of refrigeration cycle.

[0104] In addition, the waste heat collector continuously absorbs the heat generated by the compressor and the electronic control box, maintaining the surrounding temperature within an appropriate range, and to a certain extent avoiding equipment failure of the compressor and the electronic control box in a continuous high temperature environment; the compressor, waste heat collection heat exchanger, and the electronic control box can be designed as an integrated whole, and the vibration and noise during the high-frequency operation of the compressor can be absorbed by supporting the structure and adding cache components, which not only improves the user experience but also increases safety.

[0105] like Figure 8 As shown, Figure 8 The figure is a schematic diagram of the refrigerant flow through the pipeline in the system in the cooling mode. The compressor of the heat pump air conditioning system compresses the high-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure liquid refrigerant; it is condensed through the outdoor heat exchanger and heat exchanged with the outdoor air. The outdoor air temperature rises and the refrigerant temperature drops, becoming a low-temperature and high-pressure liquid refrigerant; at this time, the solenoid valve opens and closes the A and C valves in the first three-way valve and the C valve in the second three-way valve, so that the low-temperature refrigerant passes through the built-in pipe in the electric control box, absorbs the heat generated by the electric control box, and controls its temperature within an appropriate range; it passes through the first throttle valve to become a low-temperature and low-pressure gaseous refrigerant; it passes through the indoor heat exchanger to heat exchange with the indoor gas, the indoor air temperature drops, the refrigerant temperature rises, and becomes a high-temperature and low-pressure gaseous refrigerant, entering the next round of refrigeration cycle.

[0106] like Fig. 9 As shown, Fig. 9This is an overall flow chart of the waste heat recovery method of the heat pump air-conditioning system in cooling mode. When the air conditioner is in cooling mode, the solenoid valve is opened, the A and C valves in the first three-way valve and the C valve in the third three-way valve are closed, and the built-in pipeline of the electric control box is connected in series with the outdoor heat exchanger. The refrigerant absorbs heat and reduces the temperature of the electric control box. The indoor heat exchanger acts as an evaporator to continuously absorb indoor heat. The system operates stably to provide cooling capacity for the indoor space.

[0107] In this embodiment, when the air conditioner is in cooling mode, the solenoid valve is opened, the second valve and the third valve of the first three-way valve in the control reversing device are closed, and the third valve of the third three-way valve is closed; the electric control box is controlled to be connected in series with the outdoor heat exchanger, and the heat is absorbed by the outdoor heat exchanger to perform cooling. In the cooling mode, the built-in pipeline of the electric control box is connected in series with the outdoor heat exchanger. The refrigerant becomes a low-temperature refrigerant after passing through the condenser, and then flows into the built-in pipeline of the electric control box, absorbs heat, reduces the temperature of the electric control box, and improves the cooling effect.

[0108] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the waste heat recovery method of the heat pump air-conditioning system of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0109] This application also provides a waste heat recovery device for a heat pump air conditioning system, please refer to Fig.10 , the waste heat recovery device of the heat pump air conditioning system comprises:

[0110] The control module 100 is used to control the working states of the solenoid valve and the reversing device when the air conditioner is in the heating mode.

[0111] The adjustment module 200 is used to adjust the connection loop of the waste heat collection heat exchanger according to the working state, so as to recover waste heat through the waste heat collection heat exchanger.

[0112] The waste heat recovery device for a heat pump air conditioning system provided in the present application adopts the waste heat recovery method for a heat pump air conditioning system in the above-mentioned embodiment, which can solve the technical problem that the heat pump air conditioning system cannot realize waste heat recovery and has poor energy-saving effect. Compared with the prior art, the beneficial effects of the waste heat recovery device for a heat pump air conditioning system provided in the present application are the same as the beneficial effects of the waste heat recovery method for a heat pump air conditioning system provided in the above-mentioned embodiment, and the other technical features of the waste heat recovery device for a heat pump air conditioning system are the same as the features disclosed in the above-mentioned embodiment method, which will not be described in detail here.

[0113] In one embodiment, the control module 100 is further used to obtain the condenser temperature when the air conditioner is in the heating mode; and control the working states of the solenoid valve and the reversing device according to the condenser temperature.

[0114] In one embodiment, the control module 100 is also used to determine that the air conditioner is not in the defrost mode when the condenser temperature is greater than a preset temperature threshold; when the air conditioner is not in the defrost mode, the solenoid valve is opened, the valves of the first three-way valve of the control reversing device are opened, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed.

[0115] In one embodiment, the control module 100 is also used to determine that the air conditioner is not in the defrost mode when the condenser temperature is greater than a preset temperature threshold; when the air conditioner is not in the defrost mode, the solenoid valve is opened, the valves of the first three-way valve of the control reversing device are opened, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed.

[0116] In one embodiment, the adjustment module 200 is also used to adjust the connection circuit of the waste heat collection heat exchanger to be in parallel with the waste heat collection heat exchanger, the electrical control box and the outdoor heat exchanger when the working state is that the solenoid valve is open, the valves of the first three-way valve are all open, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed; heat is absorbed through the waste heat collection heat exchanger, the electrical control box and the outdoor heat exchanger respectively, so as to recover waste heat through the waste heat collection heat exchanger, the electrical control box and the outdoor heat exchanger.

[0117] In one embodiment, the adjustment module 200 is also used to adjust the connection circuit of the waste heat collection heat exchanger to connect the waste heat collection heat exchanger and the outdoor heat exchanger in series when the working state is that the solenoid valve is closed, the second valve of the first three-way valve is closed, and the third valve of the third three-way valve is closed; heat is absorbed through the waste heat collection heat exchanger, and heat is released through the outdoor heat exchanger to perform defrosting, so as to recover waste heat through the waste heat collection heat exchanger.

[0118] In one embodiment, the control module 100 is also used to open the solenoid valve, control the second valve and the third valve of the first three-way valve in the reversing device to close, and the third valve of the third three-way valve to close when the air conditioner is in cooling mode; control the electronic control box to be connected in series with the outdoor heat exchanger to absorb heat through the outdoor heat exchanger for cooling.

[0119] The present application provides an air conditioner, which includes at least one processor; and a memory that is communicatively connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the waste heat recovery method of the heat pump air conditioning system in the above-mentioned embodiment one.

[0120] Reference below Fig.11, which shows a schematic diagram of the structure of an air conditioner suitable for implementing the embodiment of the present application. The air conditioner in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Fig.11 The air conditioner shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0121] like Fig.11 As shown, the air conditioner may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the air conditioner are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the air conditioner to communicate with other devices wirelessly or wired to exchange data. Although the figure shows an air conditioner with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0122] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0123] The air conditioner provided in the present application adopts the waste heat recovery method of the heat pump air conditioning system in the above embodiment, which can solve the technical problem that the heat pump air conditioning system cannot realize waste heat recovery and has poor energy saving effect. Compared with the prior art, the beneficial effects of the air conditioner provided in the present application are the same as the beneficial effects of the waste heat recovery method of the heat pump air conditioning system provided in the above embodiment, and the other technical features in the air conditioner are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0124] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0125] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0126] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, the computer-readable program instructions being used to execute the waste heat recovery method for the heat pump air-conditioning system in the above-mentioned embodiment.

[0127] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0128] The computer-readable storage medium may be included in the air conditioner, or may exist independently without being installed in the air conditioner.

[0129] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the air conditioner, the air conditioner: controls the working state of the solenoid valve and the reversing device when the air conditioner is in the heating mode; adjusts the connection circuit of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger.

[0130] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0131] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a 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. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0132] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0133] The readable storage medium provided in the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned heat pump air conditioning system waste heat recovery method, and can solve the technical problem that the heat pump air conditioning system cannot achieve waste heat recovery and has poor energy-saving effect. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in the present application are the same as the beneficial effects of the heat pump air conditioning system waste heat recovery method provided in the above-mentioned embodiment, and will not be repeated here.

[0134] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for recovering waste heat from a heat pump air-conditioning system.

[0135] The computer program product provided in this application can solve the technical problem that the heat pump air conditioning system cannot realize waste heat recovery and has poor energy saving effect. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the waste heat recovery method of the heat pump air conditioning system provided in the above embodiment, which will not be described in detail here.

[0136] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for recovering waste heat from a heat pump air conditioning system, characterized in that: The waste heat recovery method of the heat pump air conditioning system is applied to the heat pump air conditioning system, and the heat pump air conditioning system comprises: a compressor, an indoor heat exchanger, a first throttle valve, a solenoid valve and an electric control box which are sequentially connected to form a loop through a reversing device, the indoor heat exchanger is also sequentially connected to the outdoor heat exchanger and the compressor through the reversing device, and the indoor heat exchanger is also connected to the second throttle valve, the waste heat collection heat exchanger and the compressor through the reversing device; The method comprises: When the air conditioner is in heating mode, controlling the working states of the solenoid valve and the reversing device; The connection circuit of the waste heat collection heat exchanger is adjusted according to the working state to recover waste heat through the waste heat collection heat exchanger.

2. The method according to claim 1, characterized in that When the air conditioner is in heating mode, the step of controlling the working state of the solenoid valve and the reversing device comprises: When the air conditioner is in heating mode, obtain the condenser temperature; The working states of the solenoid valve and the reversing device are controlled according to the temperature of the condenser.

3. The method according to claim 2, characterized in that The reversing device comprises: a first three-way valve, a second three-way valve and a third three-way valve, one end of the first three-way valve is connected to the first throttle valve, the other end of the first three-way valve is respectively connected to the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger, the waste heat collection heat exchanger is connected to the compressor through the second three-way valve, and the outdoor heat exchanger and the electric control box are connected to the compressor through the third three-way valve; The step of controlling the working state of the solenoid valve and the reversing device according to the condenser temperature comprises: When the condenser temperature is greater than a preset temperature threshold, determining that the air conditioner is not in a defrost mode; When the air conditioner is not in defrost mode, the solenoid valve is opened, the valves of the first three-way valve controlling the reversing device are all opened, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed.

4. The method according to claim 3, characterized in that The step of controlling the working state of the solenoid valve and the reversing device according to the condenser temperature comprises: When the condenser temperature is less than or equal to the preset temperature threshold, determining that the air conditioner is in the defrost mode; When the air conditioner is in the defrosting mode, the solenoid valve is closed, and the second valve of the first three-way valve and the third valve of the second three-way valve of the reversing device are controlled to be closed.

5. The method according to claim 1, characterized in that The step of adjusting the connection circuit of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger includes: When the working state is that the solenoid valve is open, the valves of the first three-way valve are all open, the first valve of the second three-way valve is closed, and the first valve of the third three-way valve is closed, the connection circuit of the waste heat collection heat exchanger is adjusted so that the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger are connected in parallel; Heat is absorbed by the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger respectively, so that waste heat is recovered by the waste heat collection heat exchanger, the electric control box and the outdoor heat exchanger.

6. The method according to claim 1, characterized in that The step of adjusting the connection circuit of the waste heat collection heat exchanger according to the working state to recover waste heat through the waste heat collection heat exchanger includes: When the working state is that the solenoid valve is closed, the second valve of the first three-way valve is closed, and the third valve of the third three-way valve is closed, the connection circuit of the waste heat collection heat exchanger is adjusted so that the waste heat collection heat exchanger is connected in series with the outdoor heat exchanger; Heat is absorbed by the waste heat collection heat exchanger, and heat is released by the outdoor heat exchanger to perform defrosting treatment, so that waste heat can be recovered by the waste heat collection heat exchanger.

7. The method according to any one of claims 1 to 6, characterized in that The method further comprises: When the air conditioner is in cooling mode, the solenoid valve is opened, the second valve and the third valve of the first three-way valve in the reversing device are controlled to be closed, and the third valve of the third three-way valve is closed; The electric control box is controlled to be connected in series with the outdoor heat exchanger, and heat is absorbed by the outdoor heat exchanger to perform cooling.

8. A waste heat recovery device for a heat pump air conditioning system, characterized in that: The device comprises: A control module, used for controlling the working state of the solenoid valve and the reversing device when the air conditioner is in a heating mode; The adjustment module is used to adjust the connection loop of the waste heat collection heat exchanger according to the working state, so as to recover the waste heat through the waste heat collection heat exchanger.

9. An air conditioner, characterized in that: The air conditioner comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the waste heat recovery method of the heat pump air conditioning system as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the waste heat recovery method of the heat pump air-conditioning system as described in any one of claims 1 to 7 are implemented.

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