Heat pump air conditioning system and control method and device thereof, and air conditioner

Abstract

The present application discloses a heat pump air conditioning system and its control method and device, and an air conditioner. The system includes: a compressor, a first four-way valve, a second four-way valve, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first electronic expansion valve, a second electronic expansion valve, and a two-way valve. When heating, the two-way valve and the first electronic expansion valve are opened, and the second electronic expansion valve is closed. After the refrigerant comes out of the compressor, it flows through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger, and the first four-way valve in sequence, and then returns to the compressor. The present application solves the technical problem of low COP when the air conditioning system is heating.

Description

Technical Field

[0001] The present application relates to the field of air conditioning, and more specifically, to a heat pump air conditioning system and a control method and device thereof, and an air conditioner. Background Art

[0002] Existing air conditioning systems usually use a single-suction single-row compressor to form a refrigeration cycle with single-row or multi-row heat exchangers indoors and outdoors, thereby heating or cooling the indoor air to meet the requirements of indoor environmental comfort. Figure 1 As shown, since the compressor of the air-conditioning system has only one pair of suction and exhaust ports connected to the indoor and outdoor heat exchangers, it can only achieve one evaporation temperature and condensation temperature. In order to achieve step-by-step heat exchange of indoor air, the patent with application number CN111609587A proposes a double-suction and double-temperature air-conditioning system, thereby improving the indoor heat exchange efficiency during cooling operation. However, this solution forms a single exhaust and inner and outer heat exchangers for parallel heating during heating operation, resulting in a decrease in COP (Coefficient of Performance, a commonly used performance indicator in air-conditioning systems, used to measure the energy efficiency of air-conditioning systems. COP represents the ratio between unit heat output and unit energy input, and is usually used to describe the efficiency of refrigeration systems or heat pump systems) during heating operation.

[0003] With respect to the technical problem of low COP of the above-mentioned air-conditioning system during heating, no effective solution has been proposed so far. Summary of the invention

[0004] The embodiments of the present application provide a heat pump air-conditioning system and a control method and device thereof, and an air conditioner, so as to at least solve the technical problem of low COP of the air-conditioning system during heating.

[0005] According to one aspect of an embodiment of the present application, a heat pump air-conditioning system is provided, including: a compressor, a first four-way valve, a second four-way valve, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first electronic expansion valve, a second electronic expansion valve and a two-way valve; the compressor is connected to the first four-way valve and the second four-way valve respectively, the first indoor heat exchanger is connected to the first electronic expansion valve and the first four-way valve respectively, the second indoor heat exchanger is connected to the second electronic expansion valve and the second four-way valve respectively, the outdoor heat exchanger is connected to the first four-way valve, the first electronic expansion valve and the second electronic expansion valve respectively, and the two-way valve is connected to the first indoor heat exchanger and the second indoor heat exchanger respectively; when heating is performed, the two-way valve and the first electronic expansion valve are opened, and the second electronic expansion valve is closed. After the refrigerant comes out of the compressor, it flows through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor.

[0006] Optionally, when cooling is performed, the two-way valve is closed and the throttling resistance of the first electronic expansion valve is adjusted to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby achieving step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger.

[0007] Optionally, when dehumidification is performed, the two-way valve is closed and the throttling resistance of the second electronic expansion valve is adjusted to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive the air to flow through the low-temperature first indoor heat exchanger and the high-temperature second indoor heat exchanger to complete dehumidification.

[0008] Optionally, the heat pump air conditioning system also includes: a first one-way valve, connected between the first four-way valve and the first indoor heat exchanger; a second one-way valve, connected to the second four-way valve; a first air intake port, connected between the compressor and the second one-way valve; and a second air intake port, connected between the compressor and the second four-way valve.

[0009] According to another aspect of an embodiment of the present application, an air conditioner is also provided, comprising the above-mentioned heat pump air conditioning system.

[0010] According to another aspect of the embodiment of the present application, a control method for a heat pump air-conditioning system is also provided, including: detecting a user operation; when the user operation indicates a heating operation, opening the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system, and closing the second electronic expansion valve, controlling the refrigerant to flow through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence after coming out of the compressor, and then returning to the compressor.

[0011] Optionally, after detecting the user operation, if the user operation is to instruct cooling, the two-way valve is closed and the throttling resistance of the first electronic expansion valve is adjusted to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby realizing step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger; if the user operation is to instruct dehumidification, the two-way valve is closed and the throttling resistance of the second electronic expansion valve is adjusted to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive the air to flow through the low-temperature first indoor heat exchanger and the high-temperature second indoor heat exchanger to complete dehumidification.

[0012] According to another aspect of an embodiment of the present application, a control device for a heat pump air-conditioning system is also provided, including: an interactive unit for detecting user operations; a control unit for opening the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system and closing the second electronic expansion valve when the user operation indicates a heating operation, and controlling the refrigerant to flow through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence after coming out of the compressor, and then return to the compressor.

[0013] Optionally, the control unit is also used to: after detecting the user operation, if the user operation is to indicate a cooling operation, close the two-way valve and adjust the throttling resistance of the first electronic expansion valve to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby realizing step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger; if the user operation is to indicate a dehumidification operation, close the two-way valve and adjust the throttling resistance of the second electronic expansion valve to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive the air to flow through the low-temperature first indoor heat exchanger and the high-temperature second indoor heat exchanger to complete dehumidification.

[0014] According to another aspect of an embodiment of the present application, a storage medium is further provided, which includes a stored program, and the above method is executed when the program is run.

[0015] According to another aspect of an embodiment of the present application, an electronic device is further provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the above method through the computer program.

[0016] In the embodiment of the present application, when heating is performed, the two-way valve and the first electronic expansion valve are opened, and the second electronic expansion valve is closed. After the refrigerant comes out of the compressor, it flows through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor. On the basis of ensuring the parallel double-suction and double-temperature evaporation heat exchange of refrigeration, it avoids the formation of parallel reduction of the internal and external heat exchange temperature difference during heating operation, which leads to a decrease in the heating COP, thereby solving the technical problem of low COP of the air-conditioning system during heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of a double-intake and double-temperature air conditioning system in the related art;

[0019] Figure 2 is a schematic diagram of an optional heat pump air conditioning system according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of an optional heat pump air conditioning system according to an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of an optional heat pump air conditioning system according to an embodiment of the present application;

[0022] Figure 5 is a schematic diagram of an optional heat pump air conditioning system according to an embodiment of the present application;

[0023] Figure 6 is a flow chart of a control method of a heat pump air conditioning system according to an embodiment of the present application;

[0024] Figure 7 is a schematic diagram of a control device for a heat pump air conditioning system according to an embodiment of the present application;

[0025] Figure 8 It is a structural block diagram of a terminal according to an embodiment of the present application. Implementation

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application 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 data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] According to one aspect of the embodiments of the present application, an embodiment of a heat pump air conditioning system is provided. Figure 2 is a schematic diagram of an optional heat pump air conditioning system according to an embodiment of the present application, such as Figure 2 As shown, the heat pump air conditioning system includes:

[0029] Compressor, first four-way valve (i.e., four-way valve 1), second four-way valve (i.e., four-way valve 2), outdoor heat exchanger, first indoor heat exchanger (i.e., indoor heat exchanger 1), second indoor heat exchanger (i.e., indoor heat exchanger 2), first electronic expansion valve (i.e., EEV1), second electronic expansion valve (i.e., EEV2), two-way valve, first non-return valve, first air intake port (i.e., air intake 1), second air intake port (i.e., air intake 2).

[0030] The compressor is connected to the first four-way valve and the second four-way valve respectively, the first indoor heat exchanger is connected to the first electronic expansion valve and the first four-way valve respectively, the second indoor heat exchanger is connected to the second electronic expansion valve and the second four-way valve respectively, the outdoor heat exchanger is connected to the first four-way valve, the first electronic expansion valve and the second electronic expansion valve respectively, and the two-way valve is connected to the first indoor heat exchanger and the second indoor heat exchanger respectively. The first check valve is connected between the first four-way valve and the first indoor heat exchanger; the second check valve is connected to the second four-way valve; the first air intake port is connected between the compressor and the second check valve; the second air intake port is connected between the compressor and the second four-way valve.

[0031] like Figure 3 As shown, when heating is performed, the two-way valve and the first electronic expansion valve are opened, and the second electronic expansion valve is closed. After the refrigerant comes out of the compressor, it flows through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor.

[0032] like Figure 4As shown, when cooling is performed, the two-way valve is closed and the throttling resistance of the first electronic expansion valve is adjusted to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby realizing step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger.

[0033] like Figure 5 As shown, when dehumidification is performed, the two-way valve is closed, and the throttling resistance of the second electronic expansion valve is adjusted to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive the air to flow through the low-temperature first indoor heat exchanger and the high-temperature second indoor heat exchanger to complete dehumidification.

[0034] By adopting the technical solution of the present application, on the basis of ensuring the parallel double-suction and double-temperature evaporation heat exchange in refrigeration, it is avoided that the parallel reduction of the internal and external heat exchange temperature difference during heating operation leads to a decrease in the heating COP.

[0035] According to another aspect of the present application, an embodiment of a control method for a heat pump air conditioning system is also provided. Figure 6 As shown, the method may include the following steps:

[0036] Step S1: Detecting user operation.

[0037] Step S2, when the user operation is to instruct heating, the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system are opened, and the second electronic expansion valve is closed, and the refrigerant is controlled to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor.

[0038] This application proposes a variable flow double suction double temperature air conditioning system, and its circulation principle diagram is as shown in the attached Figure 2 As shown, during cooling, the two-way valve is closed, and a double evaporation parallel heat exchange cycle is carried out. The temperature of indoor heat exchanger 1 is higher than that of indoor heat exchanger 2, forming a certain temperature difference to achieve step heat exchange and improve the evaporation heat exchange efficiency; during heating operation, EEV2 is closed, and the refrigerant is discharged through compression and flows through four-way valve 2 to indoor heat exchanger 2-indoor heat exchanger 1, and then returns to the compressor suction port through EEV1-outdoor heat exchanger-four-way valve 1, so that indoor heat exchanger 2 and indoor heat exchanger 1 are connected in series through the two-way valve, so that the indoor convection heat exchange forms countercurrent heat exchange with the indoor and outdoor heat exchangers during the indoor convection heat exchange, thereby improving the heat transfer effect. At the same time, the indoor dual-temperature heat exchange system can also be used to form a reheat dehumidification cycle.

[0039] Through the above steps, the user operation is detected; when the user operation indicates a heating operation, the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system are opened, and the second electronic expansion valve is closed, and the refrigerant is controlled to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor, which can avoid the formation of parallel reduction of the internal and external heat exchange temperature difference during heating operation and cause the heating COP to decrease, thereby solving the technical problem of low COP of the air-conditioning system during heating.

[0040] The present invention proposes a variable flow double-suction double-temperature air conditioning system, which ensures the formation of double-suction double-temperature evaporative heat exchange under cooling, and can also realize the series connection of internal and external heat exchangers during heating to enhance heat exchange. As an optional embodiment, the technical solution of the present application is further described in detail below in combination with specific implementation methods.

[0041] The present application provides a double-suction refrigeration cycle system, which forms a parallel double-suction dual-temperature evaporation heat exchange under cooling, and an inner and outer heat exchanger is connected in series during heating to enhance heat exchange; during dehumidification operation, a parallel dual-temperature reheat dehumidification is formed to achieve controllable temperature dehumidification.

[0042] Combined with Figure 2 It can be seen that the circulation system includes: a compressor with double suction, including suction 1 and suction 2; indoor heat exchangers 1 and 2 are respectively arranged along the air flow direction of the indoor fan, and are respectively connected to the outdoor heat exchanger through electronic expansion valves EEV1 and EEV2, and connected to the compressor through four-way valves 1 and 2. A connecting pipeline with a two-way valve is also arranged between the indoor heat exchanger 1 and the indoor heat exchanger 2; in addition, the circulation system is also provided with a one-way valve 1 and a one-way valve 2 to limit the flow direction of the refrigerant.

[0043] 1) Refrigeration operation

[0044] During cooling operation, the four-way valve is in the solid line connected state as shown in the figure below, and the two-way valve is closed, and a double evaporation parallel heat exchange cycle is performed. By adjusting the electronic expansion valve to make the EEV1 throttling resistance smaller than EEV2, the indoor heat exchanger 1 temperature is higher than the indoor heat exchanger temperature 2, forming a certain temperature difference to achieve step heat exchange, improve evaporation heat exchange efficiency, and reduce compressor power consumption.

[0045] 2) Heating operation

[0046] During heating operation, the four-way valve is in the solid line connected state as shown in the figure below, the two-way valve is turned on, the electronic expansion valve closes EEV2, and the refrigerant is discharged through compression and flows through the four-way valve 2 to the indoor heat exchanger 2-indoor heat exchanger 1, and then returns to the compressor suction port through EEV1-outdoor heat exchanger-four-way valve 1, so that the indoor heat exchanger 2 and the indoor heat exchanger 1 are connected in series through the two-way valve, so that the indoor convection heat exchange forms a countercurrent heat exchange with the indoor and outdoor heat exchangers during the indoor convection heat exchange, thereby improving the heat transfer effect.

[0047] 3) Dehumidification operation

[0048] During dehumidification operation, the circulation form is the same as that of refrigeration operation. The opening of the electronic expansion valve EEV2 is adjusted to increase the flow cross-section so that its flow resistance is much lower than that of EEV1, so that the temperature of the refrigerant flowing into the indoor heat exchanger 2 is increased, thereby making the heat exchanger 1 in a low-temperature state and the heat exchanger 2 in a high-temperature state, so that the air driven by the indoor fan flows through the low-temperature heat exchanger for dehumidification, and then flows through the high-temperature heat exchanger for reheating. When the reheating amount of the high-temperature heat exchanger is lower than the sensible cooling capacity of the low-temperature heat exchanger, cooling and dehumidification are achieved; when the reheating amount of the high-temperature heat exchanger is equal to the sensible cooling capacity of the low-temperature heat exchanger, constant temperature dehumidification is achieved; when the reheating amount of the high-temperature heat exchanger is higher than the sensible cooling capacity of the low-temperature heat exchanger, heating and dehumidification are achieved.

[0049] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0050] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0051] According to another aspect of the embodiment of the present application, a control device for a heat pump air conditioning system for implementing the control method of the heat pump air conditioning system is also provided. Figure 7 As shown, the device may include:

[0052] An interaction unit 71, configured to detect a user operation;

[0053] The control unit 73 is used to open the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system and close the second electronic expansion valve when the user operation indicates a heating operation, and control the refrigerant to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence before returning to the compressor.

[0054] Through the above module, user operation is detected; when the user operation indicates a heating operation, the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system are opened, and the second electronic expansion valve is closed, and the refrigerant is controlled to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor, which can avoid the formation of parallel reduction of the internal and external heat exchange temperature difference during heating operation, resulting in a decrease in the heating COP, thereby solving the technical problem of low COP of the air-conditioning system during heating.

[0055] Optionally, the control unit is also used to: after detecting a user operation, if the user operation is an operation indicating cooling, close the two-way valve, and adjust the throttling resistance of the first electronic expansion valve to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby realizing step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger; if the user operation is an operation indicating dehumidification, close the two-way valve, and adjust the throttling resistance of the second electronic expansion valve to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive air to flow through the low-temperature first indoor heat exchanger and the high-temperature second indoor heat exchanger to complete dehumidification.

[0056] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments. It should be noted that the above modules, as part of the device, can be run in a corresponding hardware environment, can be implemented by software, and can also be implemented by hardware, wherein the hardware environment includes a network environment.

[0057] According to another aspect of the embodiments of the present application, a server or terminal for implementing the control method of the above-mentioned heat pump air-conditioning system is also provided.

[0058] Figure 8 is a structural block diagram of a terminal according to an embodiment of the present application, such as Figure 8 As shown, the terminal may include: one or more (only one is shown) processors 801, a memory 803, and a transmission device 805, such as Figure 8 As shown, the terminal may also include an input and output device 807.

[0059] Among them, the memory 803 can be used to store software programs and modules, such as the program instructions / modules corresponding to the control method and device of the heat pump air conditioning system in the embodiment of the present application. The processor 801 executes various functional applications and data processing by running the software programs and modules stored in the memory 803, that is, realizing the control method of the heat pump air conditioning system mentioned above. The memory 803 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 803 may further include a memory remotely arranged relative to the processor 801, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0060] The above-mentioned transmission device 805 is used to receive or send data via a network, and can also be used for data transmission between a processor and a memory. Specific examples of the above-mentioned network may include a wired network and a wireless network. In one example, the transmission device 805 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices and routers via a network cable so as to communicate with the Internet or a local area network. In one example, the transmission device 805 is a radio frequency (Radio Frequency, RF) module, which is used to communicate with the Internet wirelessly.

[0061] Specifically, the memory 803 is used to store application programs.

[0062] The processor 801 may call the application stored in the memory 803 through the transmission device 805 to perform the following steps:

[0063] A user operation is detected; when the user operation indicates a heating operation, the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system are opened, and the second electronic expansion valve is closed, and the refrigerant is controlled to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor.

[0064] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0065] It can be understood by those skilled in the art that Figure 8 The structure shown is for illustration only, and the terminal may be a smart phone (such as an Android phone, an iOS phone, etc.), a tablet computer, a PDA, a mobile Internet device (Mobile Internet Devices, MID), a PAD, or other terminal devices. Figure 8 It does not limit the structure of the above electronic device. For example, the terminal may also include Figure 8 More or fewer components (such as network interfaces, display devices, etc.) shown in, or with Figure 8 Different configurations shown.

[0066] A person of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the hardware related to the terminal device through a program, and the program can be stored in a computer-readable storage medium, and the storage medium may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0067] The embodiment of the present application further provides a storage medium. Optionally, in this embodiment, the storage medium can be used to execute the program code of the control method of the heat pump air conditioning system.

[0068] Optionally, in this embodiment, the storage medium may be located on at least one network device among a plurality of network devices in the network shown in the above embodiment.

[0069] Optionally, in this embodiment, the storage medium is configured to store program codes for executing the following steps:

[0070] A user operation is detected; when the user operation indicates a heating operation, the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system are opened, and the second electronic expansion valve is closed, and the refrigerant is controlled to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor.

[0071] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0072] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store program codes.

[0073] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0074] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more computer devices (which may be personal computers, servers or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0075] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0076] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0077] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0079] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A heat pump air conditioning system, characterized in that: include: A compressor, a first four-way valve, a second four-way valve, an outdoor heat exchanger, a first indoor heat exchanger, a second indoor heat exchanger, a first electronic expansion valve, a second electronic expansion valve, and a two-way valve; The compressor is connected to the first four-way valve and the second four-way valve respectively, the first indoor heat exchanger is connected to the first electronic expansion valve and the first four-way valve respectively, the second indoor heat exchanger is connected to the second electronic expansion valve and the second four-way valve respectively, the outdoor heat exchanger is connected to the first four-way valve, the first electronic expansion valve and the second electronic expansion valve respectively, and the two-way valve is connected to the first indoor heat exchanger and the second indoor heat exchanger respectively; When heating is performed, the two-way valve and the first electronic expansion valve are opened, and the second electronic expansion valve is closed. After the refrigerant comes out of the compressor, it flows through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor; When dehumidification is performed, the two-way valve is closed, and the throttling resistance of the second electronic expansion valve is adjusted to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive the air to flow through the first indoor heat exchanger at a low temperature and the second indoor heat exchanger at a high temperature to complete dehumidification; When the high-temperature reheat amount of the second indoor heat exchanger is lower than the sensible cooling capacity of the low-temperature first indoor heat exchanger, cooling and dehumidification are achieved; when the high-temperature reheat amount of the second indoor heat exchanger is equal to the sensible cooling capacity of the low-temperature first indoor heat exchanger, constant temperature dehumidification is achieved; when the high-temperature reheat amount of the second indoor heat exchanger is higher than the sensible cooling capacity of the low-temperature first indoor heat exchanger, heating and dehumidification are achieved.

2. The heat pump air conditioning system according to claim 1, characterized in that: When cooling is performed, the two-way valve is closed and the throttling resistance of the first electronic expansion valve is adjusted to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby achieving step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger.

3. The heat pump air conditioning system according to any one of claims 1 to 2, characterized in that: The heat pump air conditioning system also includes: a first one-way valve connected between the first four-way valve and the first indoor heat exchanger; a second one-way valve connected to the second four-way valve; a first air intake port connected between the compressor and the second one-way valve; The second air intake port is connected between the compressor and the second four-way valve.

4. An air conditioner, characterized in that: A heat pump air conditioning system comprising any one of claims 1 to 3.

5. A control method for a heat pump air conditioning system, characterized in that: Applied to the heat pump air conditioning system according to any one of claims 1 to 3, the control method comprises: User action detected; When the user operation indicates a heating operation, the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system are opened, and the second electronic expansion valve is closed, and the refrigerant is controlled to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence, and then returns to the compressor.

6. The method according to claim 5, characterized in that After detecting the user operation, the method further includes: When the user operation is to instruct cooling, the two-way valve is closed, and the throttling resistance of the first electronic expansion valve is adjusted to be smaller than the throttling resistance of the second electronic expansion valve, so that the temperature of the first indoor heat exchanger is higher than the temperature of the second indoor heat exchanger, thereby realizing step heat exchange through the temperature difference between the first indoor heat exchanger and the second indoor heat exchanger; When the user operation is to instruct dehumidification, the two-way valve is closed and the throttling resistance of the second electronic expansion valve is adjusted to be smaller than the throttling resistance of the first electronic expansion valve, so that the temperature of the refrigerant flowing through the second indoor heat exchanger is higher than the temperature of the refrigerant flowing through the first indoor heat exchanger, thereby making the first indoor heat exchanger in a low-temperature state and the second indoor heat exchanger in a high-temperature state, and controlling the indoor fan to drive the air to flow through the low-temperature first indoor heat exchanger and the high-temperature second indoor heat exchanger to complete dehumidification.

7. A control device for a heat pump air conditioning system, characterized in that: Applicable to the heat pump air conditioning system according to any one of claims 1 to 3, the control device comprises: An interaction unit, used to detect user operations; The control unit is used to open the two-way valve and the first electronic expansion valve in the heat pump air-conditioning system and close the second electronic expansion valve when the user operation indicates a heating operation, and control the refrigerant to flow from the compressor through the second four-way valve, the second indoor heat exchanger, the first indoor heat exchanger, the first electronic expansion valve, the outdoor heat exchanger and the first four-way valve in sequence before returning to the compressor.

8. A storage medium, characterized in that: The storage medium includes a stored program, wherein the program executes the method described in any one of claims 5 to 6 when executed.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: The processor executes the method described in any one of claims 5 to 6 through the computer program.

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