Heat pump system, control method of heat pump system and air conditioner

Abstract

The invention discloses a heat pump system, a control method of the heat pump system and an air conditioner, and relates to the technical field of air conditioners, and the control method of the heat pump system comprises the steps that when the air conditioner operates in a preset mode, the target evaporation temperature of a main heat exchanger and the target evaporation temperature of an auxiliary heat exchanger are determined according to the indoor environment temperature and the indoor humidity; controlling the operation of the heat pump system according to the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger; wherein in the preset mode, the main heat exchanger and the auxiliary heat exchanger are in an evaporation state. In this way, double evaporation temperatures are achieved, the requirement for rapid cooling is met, and excessive dehumidification is reduced; through the drainage effect of the ejector at the exhaust port, the high / low evaporation temperature is achieved, the high evaporation pressure of the air suction port of the compressor and the high condensation pressure of the system are met, and compared with a traditional single evaporation pressure system, the system is more energy-saving and more comfortable; the condensing temperature can be increased by utilizing an ejector system, and higher outer side temperature can be adapted.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to heat pump systems, control methods for heat pump systems, and air conditioners. Background Technology

[0002] When conventional air conditioning systems operate for dehumidification during the plum rain season in the middle and lower reaches of the Yangtze River or the "return to spring" weather in southern China, the resulting low outlet and indoor temperatures can cause discomfort. This is because conventional air conditioning systems operate at low evaporation temperatures during dehumidification, meaning they have high compressor pressure ratios and low system energy efficiency. Current traditional single-suction compressor systems cannot achieve dual evaporation temperatures within a single system; current solutions are not energy-efficient and offer low comfort. Dual-suction evaporation temperature systems are more complex and relatively more expensive.

[0003] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of this application is to provide a heat pump system, a control method for the heat pump system, and an air conditioner, aiming to solve the technical problems of decreased comfort and low system energy efficiency caused by excessively low air outlet temperature and indoor temperature during the cooling and dehumidification operation of the air conditioning system.

[0005] To achieve the above objectives, this application proposes a heat pump system, which includes a compressor, a four-way valve, an outdoor heat exchanger, an ejector, and an indoor unit. The indoor unit includes a main heat exchanger and a secondary heat exchanger. The air inlet of the compressor, the outlet of the ejector, the outdoor heat exchanger, and the secondary heat exchanger are connected to the four-way valve.

[0006] The compressor's exhaust port is connected to the ejector's working fluid inlet. The outdoor heat exchanger, the main heat exchanger, and the ejector's ejector fluid inlet are connected in sequence. The outdoor heat exchanger is connected to the auxiliary heat exchanger.

[0007] Optionally, the heat exchange area ratio between the main heat exchanger and the auxiliary heat exchanger meets the target ratio range, and the heat exchange area of ​​the main heat exchanger is smaller than the heat exchange area of ​​the auxiliary heat exchanger.

[0008] Optionally, a main throttling device is connected between the inlet of the main heat exchanger and the outdoor heat exchanger, and a secondary throttling device is connected between the secondary heat exchanger and the outdoor heat exchanger.

[0009] Furthermore, to achieve the above objectives, this application also proposes a control method for a heat pump system, the method comprising:

[0010] When the air conditioner is running in a preset mode, the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are determined based on the indoor ambient temperature and indoor humidity.

[0011] The operation of the heat pump system is controlled based on the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger;

[0012] In the preset mode, the main heat exchanger and the auxiliary heat exchanger are in an evaporation state.

[0013] Optionally, the step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the indoor ambient temperature and indoor humidity includes:

[0014] Determine the temperature difference between the indoor ambient temperature and the set temperature, and determine the relationship between the indoor humidity and the set humidity.

[0015] The target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are determined based on the temperature difference and the magnitude relationship.

[0016] Optionally, the step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship includes:

[0017] When the temperature difference is greater than the preset temperature difference and the indoor humidity is less than the set humidity, the target evaporation temperature of the auxiliary heat exchanger is determined to be greater than the indoor dew point temperature, and the target evaporation temperature of the main heat exchanger is determined to be the first dehumidification temperature range.

[0018] Optionally, the step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship includes:

[0019] When the temperature difference is less than or equal to the preset temperature difference and the indoor humidity is less than the set humidity, the first temperature is determined as the target evaporation temperature of the auxiliary heat exchanger, and the second temperature is determined as the target evaporation temperature of the main heat exchanger.

[0020] The first temperature is greater than the second temperature.

[0021] Optionally, the step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship includes:

[0022] If the temperature difference is greater than the preset temperature difference and the indoor humidity is greater than the set humidity, then the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are both greater than the indoor dew point temperature.

[0023] Optionally, the step of controlling the operation of the heat pump system based on the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger includes:

[0024] The opening degree of the main throttling component is adjusted according to the target evaporation temperature of the main heat exchanger, and the opening degree of the secondary throttling component is adjusted according to the target evaporation temperature of the secondary heat exchanger.

[0025] Optionally, the method further includes:

[0026] When the air conditioner is running in a preset mode, the opening degree of the main throttling component is adjusted so that the evaporator output temperature of the main heat exchanger and the evaporation temperature of the main heat exchanger are within a preset superheat range.

[0027] In addition, to achieve the above objectives, this application also proposes an air conditioner, which includes a control device and a heat pump system as described above. The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the air conditioner control method as described above.

[0028] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the control method for the heat pump system as described above.

[0029] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the control method for the heat pump system as described above.

[0030] One or more technical solutions proposed in this application have at least the following technical effects:

[0031] This application achieves dual evaporation temperatures by determining the target evaporation temperatures of the main heat exchanger and the auxiliary heat exchanger based on the indoor ambient temperature and humidity when the air conditioner is running in a preset mode. The operation of the heat pump system is then controlled based on these target evaporation temperatures. In the preset mode, both the main and auxiliary heat exchangers are in an evaporation state. This method achieves dual evaporation temperatures, enabling rapid cooling and reducing excessive dehumidification. The ejector at the exhaust port facilitates both high and low evaporation temperatures while maintaining high evaporation pressure at the compressor suction port and high condensation pressure in the system, resulting in greater energy efficiency and comfort compared to traditional single-evaporation-pressure systems. Furthermore, the ejector system can increase the condensation temperature, allowing for adaptation to higher external temperatures. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural schematic diagram of a heat pump system according to Embodiment 1 of this application;

[0035] Figure 2 A schematic diagram of the ejector structure provided in Embodiment 1 of the heat pump system of this application;

[0036] Figure 3 A flowchart illustrating an embodiment of the control method for a heat pump system according to this application;

[0037] Figure 4 This is a flowchart illustrating Embodiment 2 of the control method for the heat pump system of this application.

[0038] Figure 5 This is a schematic diagram of the air conditioner structure of the hardware operating environment involved in the control method of the heat pump system in this embodiment of the application.

[0039] Explanation of icon numbers:

[0040] label name label name 100 compressor 200 Outdoor heat exchanger 300 ejector 400 Indoor unit 410 Main heat exchanger 420 auxiliary heat exchanger 500 Main throttling component 600 Secondary throttling component 700 Four-way valve

[0041] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0043] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0044] The main solution of this application embodiment is: when the air conditioner is running in a preset mode, the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are determined according to the indoor ambient temperature and indoor humidity; the operation of the heat pump system is controlled according to the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger; wherein, in the preset mode, the main heat exchanger and the auxiliary heat exchanger are in an evaporation state.

[0045] In this embodiment, for ease of description, the following description uses an air conditioner as the subject of execution.

[0046] During the plum rain season in the middle and lower reaches of the Yangtze River or the "return to spring" weather in southern China, conventional air conditioning systems often experience excessively low outlet and indoor temperatures during dehumidification, leading to discomfort. This is because conventional air conditioning systems operate at low evaporation temperatures during dehumidification, resulting in a high compressor pressure ratio and low system energy efficiency. Current traditional single-suction compressor systems cannot achieve dual evaporation temperatures within a single system; a three-pipe system with dual-suction compressors for both indoor and outdoor units is generally required. Furthermore, current conventional system technologies are not energy-efficient for both cooling and dehumidification, and offer low comfort levels. Dual-suction evaporation temperature systems are complex and have high system configuration costs.

[0047] This application provides a solution that achieves dual evaporation temperatures, enabling rapid cooling and reducing excessive dehumidification. The ejector at the exhaust port facilitates both high and low evaporation temperatures while maintaining high evaporation pressure at the compressor suction port and high condensation pressure in the system. This is more energy-efficient and comfortable than traditional single evaporation pressure systems. The ejector system can also increase the condensation temperature and accommodate higher external temperatures.

[0048] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device or air conditioner capable of performing the above functions. The following description uses an air conditioner as an example to illustrate this embodiment and the subsequent embodiments.

[0049] Based on this, the embodiments of this application provide a heat pump system, referring to... Figure 1 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the heat pump system of this application.

[0050] In this embodiment, the heat pump system includes a compressor 100, a four-way valve 800, an outdoor heat exchanger 200, an ejector 300, and an indoor unit 400. The indoor unit 400 includes a main heat exchanger 410 and a secondary heat exchanger 420. The air inlet of the compressor 100, the outlet of the ejector 300, the outdoor heat exchanger 200, and the secondary heat exchanger 420 are connected to the four-way valve.

[0051] The exhaust port of the compressor 100 is connected to the working fluid inlet of the ejector 300. The outdoor heat exchanger 200, the main heat exchanger 410 and the ejector fluid inlet of the ejector 300 are connected in sequence. The outdoor heat exchanger 200 is connected to the auxiliary heat exchanger 420.

[0052] It should be noted that the four-way valve 700 in this embodiment is used to switch between the condensing and evaporating states of the indoor unit. In the evaporating state, dual evaporation temperature control can be achieved. The air inlet of the compressor 100, the outlet of the ejector 300, the outdoor heat exchanger 200, and the auxiliary heat exchanger 420 are connected to the four-way valve.

[0053] It should be understood that the four-way valve 700 is used to switch between a first operating state and a second operating state (exhaust connected to the ejector, intake connected to the outdoor heat exchanger, outdoor heat exchanger in evaporation state, indoor heat exchanger in condensation state).

[0054] In one feasible implementation, a main throttling component 500 is connected between the inlet of the main heat exchanger 410 and the outdoor heat exchanger 200, and a secondary throttling component 600 is connected between the secondary heat exchanger 420 and the outdoor heat exchanger 200.

[0055] In one feasible implementation, the heat exchange area ratio of the main heat exchanger 410 to the auxiliary heat exchanger 420 meets the target ratio range, and the heat exchange area of ​​the main heat exchanger is smaller than the heat exchange area of ​​the auxiliary heat exchanger.

[0056] In practice, the ratio of the heat exchange area of ​​the main and auxiliary heat exchangers is controlled to be 0.2 to 0.6.

[0057] In specific implementation, such as Figure 2 The diagram shows the principle of the ejector. The higher-pressure fluid is the working fluid, which expands and accelerates in the nozzle, increasing its kinetic energy and decreasing its pressure. At the nozzle outlet, when the pressure drops below that of the ejected fluid, it flows out of the nozzle at a very high speed and enters the receiving chamber. Under the turbulent diffusion of the jet, it entrains the surrounding lower-pressure fluid. The entrained lower-pressure fluid is the ejector fluid. The working fluid and the ejector fluid mix in the mixing chamber (resulting in a medium-pressure fluid) and exchange energy. The mixed fluid enters the diffuser chamber, where its pressure increases due to the decrease in flow velocity.

[0058] It should be noted that the dual-evaporation temperature control method is as follows: the compressor discharges high-temperature and high-pressure gas through the exhaust port, which then passes through a four-way valve to the condenser. After the refrigerant is condensed by heat exchange in the condenser, it reaches the main and auxiliary throttling components. After being throttled and depressurized by the main and auxiliary throttling components, it enters the main and auxiliary evaporators respectively. The main evaporator is a low-temperature heat exchanger with a lower evaporation pressure, while the auxiliary heat exchanger is a high-temperature heat exchanger with a higher evaporation pressure.

[0059] It should be understood that the heat exchange area ratio of the main and auxiliary heat exchangers is controlled at (0.2~0.6). After the refrigerant flows through the main evaporator and evaporates at a low temperature, the expansion valve controls the low-pressure heat exchanger to release a two-phase refrigerant. Therefore, the outlet superheat is controlled at (-3~0)℃. The refrigerant enters the ejector as the ejector fluid. The high-temperature and high-pressure exhaust gas is used as the working fluid. After the two-phase refrigerant mixes with the high-temperature exhaust gas, the temperature decreases. The two-phase refrigerant expands after mixing, and the pressure increases after mixing.

[0060] In practical implementation, the evaporation temperatures of the main and auxiliary evaporators are controlled by main and auxiliary throttling components. The main evaporator provides a low evaporation temperature, primarily handling latent heat from the environment to achieve low-temperature dehumidification. The auxiliary evaporator provides a high evaporation temperature for rapid cooling. The refrigerant after the main evaporator outlet is guided by the ejector, increasing its pressure. This invention achieves a lower evaporation temperature while preventing the refrigerant from returning to the compressor suction port, thus avoiding increased compressor work and improving system efficiency. The higher low-temperature condensing pressure after the ejector outlet can adapt to high external ring temperatures, and according to Qc = kAΔt, the average heat transfer temperature difference Δt of the condenser increases, improving the condenser's heat exchange capacity. The high-pressure evaporation pressure of the auxiliary evaporator returns to the compressor, reducing compressor power consumption. Compared to single-suction single-evaporator and dual-suction systems, the system is more energy efficient, achieving comfortable dehumidification, rapid cooling, and energy savings.

[0061] Based on this, embodiments of this application provide a control method for a heat pump system, referring to... Figure 3 , Figure 3 This is a flowchart illustrating the first embodiment of the control method for the heat pump system of this application.

[0062] In this embodiment, the control method of the heat pump system includes steps S10 to S20:

[0063] Step S10: When the air conditioner is running in the preset mode, determine the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the indoor ambient temperature and indoor humidity.

[0064] It should be noted that the preset mode refers to the air conditioner being in cooling mode or dehumidification mode.

[0065] It should be understood that, firstly, the indoor ambient temperature (hereinafter referred to as T2) is obtained, and then combined with the current indoor humidity (RH), the target evaporation temperature of the main heat exchanger and the evaporation temperature of the auxiliary heat exchanger can be determined.

[0066] Step S20: Control the operation of the heat pump system according to the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger.

[0067] In practice, after determining the evaporation temperatures of the two heat exchangers, the entire heat pump system is adjusted in conjunction with the main and secondary throttling components. Specifically, this is achieved by adjusting the opening degrees of the main and secondary throttling components. The main and secondary throttling components can be electronic expansion valves, etc.

[0068] In a feasible embodiment, in order to accurately control the evaporation temperature, step S20 includes: controlling the opening degree of the main throttling component according to the target evaporation temperature of the main heat exchanger, and controlling the opening degree of the secondary throttling component according to the target evaporation temperature of the secondary heat exchanger.

[0069] It should be noted that after obtaining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger, the opening size of the main throttling component and the auxiliary throttling component required to reach the target temperature can be determined. Thus, the opening size of the main throttling component and the auxiliary throttling component can be controlled by the program inside the air conditioner to complete the low-temperature dehumidification operation.

[0070] In a feasible embodiment, in order to accurately control the superheat range, the solution of this embodiment further includes: when the air conditioner is running in a preset mode, controlling the opening of the main throttling component to adjust the opening so that the evaporator output temperature of the main heat exchanger and the evaporation temperature of the main heat exchanger are within the preset superheat range.

[0071] It should be understood that in the scheme of this embodiment, the condition T2B-T2=-3~0℃ needs to be met, that is, after the refrigerant flows through the main evaporator and evaporates at low temperature, the expansion valve controls the low-pressure heat exchanger to flow out as a two-phase refrigerant. Therefore, the preset superheat range for controlling the outlet superheat is (-3~0)℃.

[0072] This embodiment provides a control method for a heat pump system. When the air conditioner is running in a preset mode, the target evaporation temperatures of the main heat exchanger and the auxiliary heat exchanger are determined based on the indoor ambient temperature and humidity. The operation of the heat pump system is then controlled according to these target evaporation temperatures. In the preset mode, both the main and auxiliary heat exchangers are in an evaporation state. This method achieves dual evaporation temperatures, enabling rapid cooling and reducing excessive dehumidification. The ejector at the exhaust port facilitates both high and low evaporation temperatures while maintaining high evaporation pressure at the compressor suction port and high condensation pressure in the system, resulting in greater energy efficiency and comfort compared to traditional single-evaporation-pressure systems. Furthermore, the ejector system can increase the condensation temperature, allowing for adaptation to higher external temperatures.

[0073] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 4Step S10 includes steps S101 to S102:

[0074] Step S101: Determine the temperature difference between the indoor ambient temperature and the set temperature, and determine the relationship between the indoor humidity and the set humidity;

[0075] It should be noted that, firstly, the indoor ambient temperature and humidity are obtained, and then combined with the temperature and humidity preset by the air conditioner, so as to determine the temperature difference between the indoor ambient temperature and the set temperature, as well as the relationship between the indoor humidity and the set humidity.

[0076] Step S102: Determine the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship.

[0077] It should be understood that the specific steps for determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are to determine the corresponding values ​​by the magnitude of the temperature difference and the different relationships between their magnitudes.

[0078] In a feasible embodiment, step S102 includes: when the temperature difference is greater than a preset temperature difference and the indoor humidity is less than a set humidity, determining that the target evaporation temperature of the auxiliary heat exchanger is greater than the indoor dew point temperature and the target evaporation temperature of the main heat exchanger is a first dehumidification temperature range.

[0079] In practice, the indoor ambient temperature T1, indoor humidity RH, set temperature Ts, and set humidity TRH are detected. The temperature difference is greater than a preset temperature difference, and the indoor humidity is less than the set humidity. Specifically, the preset temperature difference is 2 degrees Celsius, meaning T1 - Ts > 2°C and TRH < RH, i.e., the difference between the set temperature and the indoor ambient temperature is greater than 2 degrees Celsius.

[0080] It should be noted that, in this case, the indoor dew point temperature T5 is calculated, and rapid cooling is achieved through the secondary heat exchanger, that is, the secondary throttling device controls the temperature of the secondary heat exchanger to T2. 副 >T5, where T2 副 The target evaporation temperature for the auxiliary heat exchanger.

[0081] It should be understood that achieving energy-saving dehumidification through the main heat exchanger refers to controlling T2 through the main throttling component. 主 The temperature range is 5-8℃, which is the first dehumidification temperature range. (T2) 主 The target evaporation temperature of the main heat exchanger is T2B-T2=(-3~0).

[0082] In a feasible embodiment, step S102 further includes: when the temperature difference is less than or equal to a preset temperature difference and the indoor humidity is less than a set humidity, determining a first temperature as the target evaporation temperature of the auxiliary heat exchanger, and determining a second temperature as the target evaporation temperature of the main heat exchanger; the first temperature is greater than the second temperature.

[0083] In practical implementation, under these conditions, T1-Ts≤2℃ and Trh<RH, the target evaporation temperature of the auxiliary heat exchanger is determined as the first temperature, specifically T2. 副 = (T5+2)℃, achieving condensation and reheat. Meanwhile, the main throttling component controls T2. 主 The second temperature is T2 主 = (T5-3)℃, so the first temperature is greater than the second temperature, and T2B-T2 = (-3 to 0).

[0084] In one feasible implementation, step S102 further includes: when the temperature difference is greater than the preset temperature difference and the indoor humidity is greater than the set humidity, determining that the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are both greater than the indoor dew point temperature.

[0085] It should be noted that at this point, T1-Ts > 2℃ and TRH > RH. Therefore, to achieve rapid cooling and energy-saving temperature reduction, the main throttling component controls T2. 主 To achieve rapid cooling and energy saving at temperatures exceeding T5+1℃, the secondary throttling component controls T. 2副 >T5+1℃, and T2B-T2=(-3~0).

[0086] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the heat pump system of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0087] This application provides an air conditioner, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the control method of the heat pump system in the first embodiment described above.

[0088] The following is for reference. Figure 5The diagram illustrates a structural schematic of an air conditioner suitable for implementing embodiments of this application. The air conditioner in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 5 The air conditioner shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0089] like Figure 5 As shown, the air conditioner may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the air conditioner. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the air conditioner to communicate wirelessly or wiredly with other devices 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 of the systems shown. More or fewer systems may be implemented alternatively.

[0090] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0091] The air conditioner provided in this application, employing the control method of the heat pump system in the above embodiments, can solve the technical problems of decreased comfort and low system energy efficiency caused by excessively low air outlet and indoor temperatures during the cooling and dehumidification operation of the air conditioning system. Compared with the prior art, the beneficial effects of the air conditioner provided in this application are the same as those of the control method of the heat pump system provided in the above embodiments, and other technical features of this air conditioner are the same as those disclosed in the method of the previous embodiment, and will not be repeated here.

[0092] It should be understood that the various parts disclosed in this application can be implemented using 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 suitable manner in one or more embodiments or examples.

[0093] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0094] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the control method of the heat pump system in the above embodiments.

[0095] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. 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 conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0096] The aforementioned computer-readable storage medium may be included in the air conditioner; or it may exist independently and not be installed in the air conditioner.

[0097] The aforementioned computer-readable storage medium carries one or more programs that, when executed by an air conditioner, cause the air conditioner to: determine the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the indoor ambient temperature and indoor humidity when the air conditioner is running in a preset mode; and control the operation of the heat pump system based on the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger; wherein, in the preset mode, the main heat exchanger and the auxiliary heat exchanger are in an evaporation state.

[0098] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0099] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0100] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0101] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the above-described heat pump system. This solves the technical problems of decreased comfort and low system energy efficiency caused by excessively low air outlet and indoor temperatures during the cooling and dehumidification operation of the air conditioning system. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the control method of the heat pump system provided in the above embodiments, and will not be repeated here.

[0102] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for the heat pump system described above.

[0103] The computer program product provided in this application can solve the technical problems of decreased comfort and low system energy efficiency caused by excessively low air outlet temperature and indoor temperature during the cooling and dehumidification operation of an air conditioning system. 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 heat pump system control method provided in the above embodiments, and will not be repeated here.

[0104] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A heat pump system, characterized in that, The heat pump system includes a compressor, a four-way valve, an outdoor heat exchanger, an ejector, and an indoor unit. The indoor unit includes a main heat exchanger and a secondary heat exchanger. The air inlet of the compressor, the outlet of the ejector, the outdoor heat exchanger, and the secondary heat exchanger are connected to the four-way valve. The compressor's exhaust port is connected to the ejector's working fluid inlet. The outdoor heat exchanger, the main heat exchanger, and the ejector's ejector fluid inlet are connected in sequence. The outdoor heat exchanger is connected to the auxiliary heat exchanger.

2. The heat pump system as described in claim 1, characterized in that, The heat exchange area ratio between the main heat exchanger and the auxiliary heat exchanger meets the target ratio range, and the heat exchange area of ​​the main heat exchanger is smaller than that of the auxiliary heat exchanger.

3. The heat pump system as described in claim 1 or 2, characterized in that, A main throttling device is connected between the inlet of the main heat exchanger and the outdoor heat exchanger, and a secondary throttling device is connected between the secondary heat exchanger and the outdoor heat exchanger.

4. A control method for a heat pump system, characterized in that, Applied to a heat pump system as claimed in claims 1 to 2, the method comprises: When the air conditioner is running in a preset mode, the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are determined based on the indoor ambient temperature and indoor humidity. The operation of the heat pump system is controlled based on the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger; In the preset mode, the main heat exchanger and the auxiliary heat exchanger are in an evaporation state.

5. The method as described in claim 4, characterized in that, The steps for determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the indoor ambient temperature and indoor humidity include: Determine the temperature difference between the indoor ambient temperature and the set temperature, and determine the relationship between the indoor humidity and the set humidity. The target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are determined based on the temperature difference and the magnitude relationship.

6. The method as described in claim 5, characterized in that, The step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship includes: When the temperature difference is greater than the preset temperature difference and the indoor humidity is less than the set humidity, the target evaporation temperature of the auxiliary heat exchanger is determined to be greater than the indoor dew point temperature, and the target evaporation temperature of the main heat exchanger is determined to be the first dehumidification temperature range.

7. The method as described in claim 5, characterized in that, The step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship includes: When the temperature difference is less than or equal to the preset temperature difference and the indoor humidity is less than the set humidity, the first temperature is determined as the target evaporation temperature of the auxiliary heat exchanger, and the second temperature is determined as the target evaporation temperature of the main heat exchanger. The first temperature is greater than the second temperature.

8. The method as described in claim 5, characterized in that, The step of determining the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger based on the temperature difference and the magnitude relationship includes: If the temperature difference is greater than the preset temperature difference and the indoor humidity is greater than the set humidity, then the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger are both greater than the indoor dew point temperature.

9. The method according to any one of claims 4-8, characterized in that, Applied to the heat pump system as described in claim 3, the step of controlling the operation of the heat pump system based on the target evaporation temperature of the main heat exchanger and the target evaporation temperature of the auxiliary heat exchanger includes: The opening degree of the main throttling component is adjusted according to the target evaporation temperature of the main heat exchanger, and the opening degree of the secondary throttling component is adjusted according to the target evaporation temperature of the secondary heat exchanger.

10. The method according to any one of claims 4-8, characterized in that, The method further includes: When the air conditioner is running in a preset mode, the opening degree of the main throttling component is adjusted so that the evaporator output temperature of the main heat exchanger and the evaporation temperature of the main heat exchanger are within a preset superheat range.

11. An air conditioner, characterized in that, The air conditioner includes a control device and a heat pump system as described in claims 1 to 3. The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the air conditioner control method as described in any one of claims 4 to 10.

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