Heat pump air conditioning system, control method and device, and vehicle

Abstract

Embodiments of the present application disclose a heat pump air conditioning system, a control method and device, and a vehicle. The method comprises: obtaining a target temperature of the vehicle heating under a vehicle heating program; calculating a heating power of the heat pump air conditioning system based on the target temperature; obtaining a real-time temperature of the heat pump air conditioning system and a water inlet temperature of a chiller in the heat pump air conditioning system; and controlling the heat pump air conditioning system to enter a corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system and the water inlet temperature of the chiller. The embodiments of the present application can overcome the low heating capacity of the heat pump air conditioning system of the vehicle at low temperature, improve the air conditioning energy efficiency ratio of the heat pump air conditioning system of the vehicle at low temperature, improve the comfort of the vehicle air conditioning, avoid auxiliary heating by a heater, save production cost, and improve user experience.

Description

Technical Field

[0001] This application relates to the field of vehicle heating technology, specifically to a heat pump air conditioning system, a control method for a heat pump air conditioning system, a control device for a heat pump air conditioning system, a vehicle, and a computer-readable storage medium. Background Technology

[0002] Heat pump air conditioning technology has been gradually and successfully implemented by major OEMs. However, due to the characteristics of heat pumps, under extremely low temperatures, the pressure of the heat pump air conditioning system is low, the compressor starts unstably, and the heating rate is slow, resulting in poor heating performance. In such cases, an auxiliary heater is still needed, which significantly increases the cost of the vehicle's air conditioning system compared to traditional air conditioning. Furthermore, the slow heating rate and poor heating performance of existing heat pump air conditioning systems negatively impact the user experience. Summary of the Invention

[0003] The embodiments of this application provide a heat pump air conditioning system, control method and device, and vehicle to solve the problems of large components in the prior art heat pump air conditioning system, which leads to increased production costs and slow heating rate.

[0004] According to one aspect of the embodiments of this application, a heat pump air conditioning system is provided, comprising: a gas-liquid separator and a compressor, the gas-liquid separator being connected to the compressor; an in-vehicle heat exchanger being connected to the compressor; a cooler being connected to the in-vehicle heat exchanger and the gas-liquid separator; a first solenoid valve being disposed between the in-vehicle heat exchanger and the cooler, the cooler being connected to an external water circulation system; and an external heat exchanger, one end of which is connected to the first solenoid valve and the in-vehicle heat exchanger. The pipeline between the heat exchanger and the refrigerator is provided, with the other end of the heat exchanger connected to the first solenoid valve and the refrigerator; a first check valve is provided in the pipeline between the first solenoid valve and the heat exchanger; a second solenoid valve is provided, with one end connected to the pipeline between the heat exchanger and the first check valve, and the other end connected to the pipeline between the gas-liquid separator and the refrigerator; and a second check valve is provided in the pipeline between the second solenoid valve and the gas-liquid separator.

[0005] According to one aspect of the embodiments of this application, a control method for a heat pump air conditioning system is provided, applied to the heat pump air conditioning system as described above, comprising: obtaining a target temperature for vehicle heating under a vehicle heating program; calculating the heating power of the heat pump air conditioning system based on the target temperature; obtaining the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system; and controlling the heat pump air conditioning system to enter a corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the refrigerant.

[0006] According to one aspect of the present application, the method further includes: calculating the target air outlet temperature of the heat pump air conditioning system under the current heating mode; obtaining the actual air outlet temperature of the heat pump air conditioning system, and calculating the target speed of the target compressor based on the temperature difference between the target air outlet temperature and the actual air outlet temperature.

[0007] According to one aspect of the embodiments of this application, the method further includes: if the target outlet air temperature of the heat pump air conditioning system is less than the actual outlet air temperature, then obtaining the exhaust temperature of the heat pump air conditioning system and the pressure value corresponding to the compressor; if the exhaust temperature reaches or exceeds a preset exhaust temperature threshold and / or the pressure value corresponding to the compressor reaches or exceeds a preset compressor pressure threshold, then controlling the compressor to decelerate according to a preset ratio.

[0008] According to one aspect of the embodiments of this application, the heat pump air conditioning system further includes a first large-diameter electronic expansion valve, which is disposed between the external heat exchanger and the internal heat exchanger; the step of controlling the heat pump air conditioning system to enter a corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the refrigerant includes: if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the real-time temperature of the heat pump air conditioning system reaches or exceeds a preset temperature threshold, the heating power of the heat pump air conditioning system is less than a preset heating power, and the inlet water temperature of the refrigerant is less than a preset temperature threshold, then the heat pump air conditioning system is controlled to enter a first heating mode, the first heating mode including: controlling the first solenoid valve to close, the second solenoid valve to open, and the first large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit; calculating the target subcooling degree of the heat pump air conditioning system in the first heating mode; obtaining the actual subcooling degree of the heat pump air conditioning system, and determining the opening value of the first large-diameter electronic expansion valve based on the subcooling degree difference between the target subcooling degree and the actual subcooling degree.

[0009] According to one aspect of the embodiments of this application, the heat pump air conditioning system further includes a small-diameter electronic expansion valve, which is disposed in the pipeline between the cooler and the first one-way valve; the step of controlling the heat pump air conditioning system to enter a corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler includes: if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the real-time temperature of the heat pump air conditioning system does not reach a preset temperature threshold, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is greater than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter a second heating mode, the second heating mode including: controlling the first solenoid valve to open, the second solenoid valve to close, and the small-diameter electronic expansion valve to open, so as to form a corresponding heating circuit; calculating the target subcooling degree of the heat pump air conditioning system in the second heating mode; obtaining the actual subcooling degree of the heat pump air conditioning system, and determining the opening value of the small-diameter electronic expansion valve based on the subcooling degree difference between the target subcooling degree and the actual subcooling degree.

[0010] According to one aspect of the embodiments of this application, the heat pump air conditioning system further includes: a second large-diameter electronic expansion valve, one end of which is connected to a pipeline between the vehicle heat exchanger and the compressor, and the other end is connected between the first one-way valve and the refrigerant; controlling the heat pump air conditioning system to enter a corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the refrigerant includes: if the heat pump air conditioning system cannot enter the first heating mode and the second heating mode, then controlling the heat pump air conditioning system to enter a third heating mode, the third heating mode including: controlling the first solenoid valve to close, the second solenoid valve to close, the small-diameter electronic expansion valve to open, and the second large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit; in the third heating mode, calculating the target pressure value of the heat pump air conditioning system; obtaining the real-time pressure value of the heat pump air conditioning system, and determining the opening value of the second large-diameter electronic expansion valve based on the pressure difference between the target pressure value and the real-time pressure value.

[0011] According to one aspect of the embodiments of this application, the method further includes: if the real-time pressure value of the heat pump air conditioning system is greater than a preset pressure threshold of the heat pump air conditioning system, then calculating the pressure difference between the real-time pressure value of the heat pump air conditioning system and the preset pressure threshold of the heat pump air conditioning system; and reducing the opening value of the second large-diameter electronic expansion valve according to a preset ratio based on the pressure difference.

[0012] According to one aspect of the embodiments of this application, a control device for a heat pump air conditioning system is provided. The device includes: a first acquisition module, configured to acquire a target temperature for vehicle heating under a vehicle heating program; a calculation module, configured to calculate the heating power of the heat pump air conditioning system based on the target temperature; a second acquisition module, configured to acquire the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system; and a determination module, configured to determine the heating mode corresponding to the heat pump air conditioning system based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the refrigerant.

[0013] According to one aspect of the present application, a vehicle is provided, the vehicle including a control device for a heat pump air conditioning system as described above.

[0014] In the technical solution provided in the embodiments of this application, different heating lines in the heat pump air conditioning system are connected by controlling the opening and closing of the solenoid valve, thereby increasing the heating area of ​​the in-vehicle heat exchanger and the heat exchange effect between the in-vehicle heat exchanger and the external heat exchanger. This overcomes the disadvantage of low heating capacity of the automotive heat pump air conditioning system when heating at low temperatures, and improves the air conditioning energy efficiency ratio of the automotive heat pump air conditioning system when heating at low temperatures. This enhances the comfort of the whole vehicle air conditioning, avoids the need for auxiliary heating with a heater, saves production costs, and improves the user experience.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0016] 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. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of a heat pump air conditioning system shown in an exemplary embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of a heat pump air conditioning system shown in another exemplary embodiment of this application;

[0019] Figure 3 This application is a schematic diagram illustrating the implementation environment of the control of a heat pump air conditioning system, as shown in an exemplary embodiment.

[0020] Figure 4This application is a schematic diagram illustrating the implementation environment of the control of a heat pump air conditioning system, which is another exemplary embodiment of this application.

[0021] Figure 5 This is a flowchart illustrating a control method for a heat pump air conditioning system, as shown in an exemplary embodiment of this application;

[0022] Figure 6 This is a flowchart illustrating a control method for a heat pump air conditioning system, as shown in another exemplary embodiment of this application;

[0023] Figure 7 This is a flowchart illustrating a control method for a heat pump air conditioning system, as shown in another exemplary embodiment of this application;

[0024] Figure 8 yes Figure 5 A flowchart of step S540 in an exemplary embodiment shown in the illustrated example;

[0025] Figure 9 This is an exemplary embodiment showing a heating pipeline diagram corresponding to a first heating mode;

[0026] Figure 10 yes Figure 5 A flowchart of step S540 in an exemplary embodiment shown in the illustrated example;

[0027] Figure 11 This is an exemplary embodiment illustrating the heating pipeline diagram corresponding to the second heating mode;

[0028] Figure 12 yes Figure 5 A flowchart of step S540 in an exemplary embodiment shown in the illustrated example;

[0029] Figure 13 This is an exemplary embodiment showing the heating pipeline diagram corresponding to the third heating mode;

[0030] Figure 14 This is a flowchart illustrating a control method for a heat pump air conditioning system, as shown in another exemplary embodiment of this application;

[0031] Figure 15 This is a schematic diagram of the structure of a heat pump air conditioning system shown in an exemplary embodiment of this application;

[0032] Figure 16 This is a simplified flowchart illustrating a control method for a heat pump air conditioning system in an exemplary application scenario.

[0033] Figure 17 This is a block diagram of a control device for a heat pump air conditioning system, illustrating an exemplary embodiment of this application;

[0034] Figure 18 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown. Detailed Implementation

[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0036] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0037] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0038] In this application, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0039] First, it's important to understand that a heat pump air conditioner is a highly efficient and energy-saving air conditioning device that uses heat pump technology to heat or cool a room. The core components of a heat pump air conditioner are the compressor and the heat exchanger, which control the indoor temperature by absorbing or expelling heat from the air. In cooling mode, the heat pump absorbs heat from the room and then transfers it outdoors through compression and heat exchange to achieve indoor cooling. In heating mode, the process is reversed: heat is absorbed from the outside and then transferred indoors through heat exchange to achieve heating.

[0040] Heat pump air conditioners primarily use a reverse circulation method to transfer heat from a low-temperature object to a high-temperature object, thus reducing energy consumption during operation. Conventional air conditioners achieve cooling and heating through the liquefaction and vaporization of refrigerant, requiring a compressor.

[0041] Currently, the main type of heat pump in electric vehicles is the air-source heat pump. This type absorbs heat from the air and then uses a small amount of electricity to drive a compressor to transfer the absorbed heat into the vehicle, achieving a heating effect. Compared to PTC (Potentially Transmitted Temperature Coefficient) heating systems, this method consumes significantly less electricity. According to relevant data, heat pump air conditioning is 2-3 times more efficient than PTC heat-sensitive air conditioning, effectively extending the vehicle's range by more than 20%. For example, a car with PTC air conditioning will lose about 50-80 kilometers of range after one hour of heating; however, a car with heat pump air conditioning might only lose about 20-30 kilometers of range after one hour of heating.

[0042] This application discloses a heat pump air conditioning system for a vehicle, the heat pump air conditioning system comprising:

[0043] The vehicle interior heat exchanger is connected to the compressor.

[0044] The refrigeration unit is connected to the in-vehicle heat exchanger and the gas-liquid separator.

[0045] The first solenoid valve is located between the heat exchanger and the refrigeration unit inside the vehicle, and the refrigeration unit is connected to the external water circulation system.

[0046] An external heat exchanger is provided, with one end connected to the pipeline between the first solenoid valve and the internal heat exchanger, and the other end connected to the pipeline between the solenoid valve and the refrigeration unit.

[0047] The first one-way valve is located in the pipeline between the first solenoid valve and the external heat exchanger.

[0048] The second solenoid valve has one end connected to the pipeline between the external heat exchanger and the check valve, and the other end connected to the pipeline between the gas-liquid separator and the refrigerator.

[0049] The second check valve is located in the pipeline between the second solenoid valve and the gas-liquid separator.

[0050] Specifically, such as Figure 1As shown, the heat pump air conditioning system includes a gas-liquid separator 1 and a compressor 2, wherein the gas-liquid separator 1 and the compressor 2 are connected; an in-vehicle heat exchanger 3, which is connected to the compressor 2; a refrigerator 4, one end of which is connected to the in-vehicle heat exchanger 3 and the other end of which is connected to the gas-liquid separator 1; a first solenoid valve 5, wherein the first solenoid valve 5 is disposed between the in-vehicle heat exchanger 3 and the refrigerator 4, and the refrigerator 4 is connected to an external water circulation system; and an external heat exchanger 6, one end of which is connected to the heating pipeline between the first solenoid valve 5 and the in-vehicle heat exchanger 3. The other end of the external heat exchanger 6 is located in the heating pipeline between the first solenoid valve 5 and the refrigerator 4. The first one-way valve 7 is located in the heating pipeline between the first solenoid valve 5 and the external heat exchanger 6. The second solenoid valve 8 is connected at one end to the heating pipeline between the external heat exchanger 6 and the first one-way valve 7, and at the other end to the heating pipeline between the gas-liquid separator 1 and the refrigerator 3. The second one-way valve 9 is located in the heating pipeline between the second solenoid valve 8 and the gas-liquid separator 1.

[0051] Furthermore, in some feasible embodiments, such as Figure 2 As shown, the components used in the vehicle's heat pump air conditioning system, such as Figure 2 As shown, the heat pump air conditioning system also includes a first sensor 10, which is located in the pipeline between the compressor 2 and the in-vehicle heat exchanger 3; a second sensor 11, which is located in the pipeline between the gas-liquid separator 1 and the refrigerator 3; and a third sensor 12, which is connected to the external water circulation system 200. The first sensor 10 can be used to collect the pressure and temperature of the pipeline between the compressor 2 and the in-vehicle heat exchanger 3, the second sensor 11 can be used to collect the pressure and temperature of the pipeline between the gas-liquid separator 1 and the refrigerator 3, and the third sensor 12 can be used to collect the temperature of the external water circulation system 200.

[0052] Furthermore, in some feasible embodiments, such as Figure 3 As shown, the aforementioned heat pump air conditioning system also includes an evaporator 13, one end of which is connected to a first one-way valve 7, and the other end is connected to the pipeline between a second solenoid valve 8 and a second one-way valve 9. Figure 3 The heat pump air conditioning system shown also includes a small-diameter electronic expansion valve, which is installed in the pipeline between the evaporator 13 and the first one-way valve 7.

[0053] Vehicles have different heating needs for heat pump air conditioning under different operating environments. In order to improve the slow heating rate and poor heating effect of the existing heat pump air conditioning system, which affects the user experience, it is necessary to control the solenoid valve in the heat pump air conditioning system according to the time needs under different vehicle operating environments, so as to improve the heating efficiency of the heat pump air conditioning system.

[0054] Figure 3 This is a schematic diagram illustrating the implementation environment of the control of a heat pump air conditioning system, as shown in an exemplary embodiment of this application. Figure 3 As shown, when the vehicle starts the heating program, the smart terminal 310 obtains the target temperature of the vehicle heating and calculates the heating power of the heat pump air conditioning system when the vehicle reaches the target temperature. By obtaining the real-time temperature in the pipes of the heat pump air conditioning system and the inlet water temperature of the refrigerant of the heat pump air conditioning system, the smart terminal 310 determines the corresponding heating mode of the heat pump system based on the heating power of the heat pump air conditioning, the real-time temperature of the heat pump air conditioning, and the inlet water temperature of the refrigerant. Based on the corresponding heating mode, the smart terminal 310 controls the working status of the components in the heat pump air conditioning system.

[0055] Furthermore, Figure 3 The application scenario shown is implemented by a single terminal. However, embodiments of this application can also be implemented jointly by a terminal device and a server. For example... Figure 4 As shown, optionally, the terminal device 410 can establish a connection with the server 420 via wired or wireless means. The terminal device 410 obtains the target heating temperature of the vehicle when the vehicle starts the heating program, and then sends the target heating temperature of the vehicle to the server 420. The terminal device 410 collects the real-time temperature in the pipes of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system, and then sends them to the server 420. The server 420 determines the corresponding heating mode of the heat pump system based on the heating power of the heat pump air conditioning, the real-time temperature of the heat pump air conditioning, and the inlet water temperature of the refrigerant, and then controls the working status of the components in the heat pump air conditioning system based on the corresponding heating mode.

[0056] It should be noted that the server in this application embodiment can be an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN (Content Delivery Network), and big data and artificial intelligence platforms. The terminal device can be a smartphone, tablet, laptop, desktop computer, smart speaker, smartwatch, smart home device, in-vehicle terminal, aircraft, etc., but is not limited to these.

[0057] The following details the various implementation details of the technical solutions in the embodiments of this application:

[0058] Please see Figure 5 , Figure 5 This is a flowchart illustrating a control method for a heat pump air conditioning system, as shown in an exemplary embodiment of this application. The method can be executed by a terminal device, a server, or both. Figure 5 As shown, this data update method includes at least steps S510 to S540, which are described in detail below:

[0059] Step S510: Under the vehicle heating program, obtain the target temperature for vehicle heating.

[0060] It should be noted that users can start the vehicle's heating program according to the actual needs of the operating environment and adjust the target temperature required for heating. Optionally, in cold weather, users can turn on the vehicle's heating mode in the vehicle's control panel and determine the target temperature to be achieved.

[0061] Step S520: Calculate the heating power of the heat pump air conditioning system based on the target temperature.

[0062] Specifically, the heating power required for the heat pump air conditioning system to output the target temperature can be calculated based on the target temperature to be reached in the vehicle. For example, the heating power of the heat pump air conditioning system when the target temperature is reached under the current air outlet mode can be calculated.

[0063] Optionally, the required air volume of the entire vehicle can be calculated based on the target temperature required by the vehicle. The required air volume to reach the target temperature can be calculated according to different air outlet modes of the vehicle. It should be noted that the air outlet modes include face blowing, face blowing and foot blowing, foot blowing, foot blowing defrosting, and defrosting. The required air volume of the entire vehicle can be determined based on a table that matches the pre-set air outlet mode and the target temperature according to the current air outlet mode of the vehicle.

[0064] Step S530: Obtain the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system.

[0065] Specifically, by measuring the real-time temperature of the heat pump air conditioning system's pipes and the inlet water temperature of the heat pump air conditioning system's refrigerant, the current publicly available information about the heat pump air conditioning system in the vehicle can be determined, thereby further determining whether the heat pump air conditioning system has the fastest heating rate.

[0066] Step S540: Based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler, control the heat pump air conditioning system to enter the corresponding heating mode.

[0067] Specifically, the heating power of the heat pump air conditioning system can be controlled by the air volume of the heat pump air conditioning system to meet the target temperature required by the vehicle, as well as the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system.

[0068] It should be noted that heat pump air conditioners can operate in two modes: air source heat pump and water source heat pump. Air source heat pump mode involves a pump, which is a work-generating tool that increases potential energy. Based on the law of conservation of energy, it uses work to cause energy to flow in the reverse direction from low to high. Air source heat pumps, also called air-cooled heat pumps, operate on the principle of a reverse Carnot cycle. They require only a small amount of electricity to drive a compressor to compress and rub the relatively cool air, raising its temperature. This modified air then condenses upon contact with the condenser and evaporates to dissipate heat, repeating the cycle to extract heat energy from the air for direct use. When the ambient temperature is above zero, its heat energy utilization rate is three times that of a conventional coal-fired boiler, with a thermal efficiency of up to 400%. Because its heat source is air, it causes very little environmental pollution.

[0069] In water source heat pump mode (in heating mode): High-temperature, high-pressure refrigerant gas exits the compressor and enters the condenser. The refrigerant releases heat into the supplied hot water, cooling it into a high-pressure liquid and raising the water temperature. The refrigerant then expands through the expansion valve into a low-temperature, low-pressure liquid, entering the evaporator to absorb heat from the low-temperature heat source water, evaporating into low-pressure vapor and lowering the water temperature. The low-pressure refrigerant vapor then re-enters the compressor and is compressed into a high-temperature, high-pressure gas, thus cycling through the condenser to obtain supplied hot water.

[0070] In this embodiment, by controlling the opening and closing of the solenoid valve, different heating lines in the heat pump air conditioning system are connected to realize the heating area of ​​the in-vehicle heat exchanger, increase the heat exchange effect between the in-vehicle heat exchanger and the external heat exchanger, thereby overcoming the disadvantage of low heating capacity of the automotive heat pump air conditioning system when heating at low temperatures. At the same time, it improves the air conditioning energy efficiency ratio of the automotive heat pump air conditioning system when heating at low temperatures, thereby improving the comfort of the whole vehicle air conditioning, avoiding auxiliary heating with a heater, saving production costs, and improving the user experience.

[0071] Furthermore, based on the above embodiments, please refer to... Figure 6 In one exemplary embodiment provided in this application, the specific implementation flow of the control method for the heat pump air conditioning system further includes the following steps S610 and S620, which are described in detail below:

[0072] Step S610: Calculate the target air outlet temperature of the heat pump air conditioning system under the current heating mode;

[0073] Step S620: Obtain the actual air outlet temperature of the heat pump air conditioning system, and calculate the target speed of the target compressor based on the temperature difference between the target air outlet temperature and the actual air outlet temperature.

[0074] It should be noted that, as mentioned in the above embodiments, the heat pump in a heat pump air conditioner is an energy-saving technology invented in modern science. By inputting a certain amount of electrical energy into the heat pump unit to drive the compressor to do work, the working fluid in the unit repeatedly undergoes the physical phase change process of evaporation and heat absorption and condensation and heat release, thereby realizing the exchange and transfer of heat in space.

[0075] Specifically, under the current heating mode, the target outlet air temperature corresponding to the heat pump air conditioning system reaching the target temperature is determined. Furthermore, the temperature difference between the actual outlet air temperature of the heat pump air conditioning system at the current moment and the target outlet air temperature is calculated. Based on the temperature difference between the real-time outlet air temperature of the heat pump air conditioning system and the target outlet air temperature, the work required by the compressor is determined according to the temperature difference. The corresponding speed of the compressor can then be calculated. By controlling the compressor to operate at the corresponding speed, the heat pump air conditioning system can output the target outlet air temperature.

[0076] In this embodiment, the target air outlet temperature of the heat pump air conditioning system in the current heating mode is calculated, and the target speed of the target compressor is calculated by calculating the temperature difference between the target air outlet temperature and the actual air outlet temperature. This not only achieves precise control of the compressor, but also improves heating efficiency and ensures the user experience.

[0077] Furthermore, based on the above embodiments, please refer to... Figure 7 In one exemplary embodiment provided in this application, the detailed implementation flowchart of the control method for the heat pump air conditioning system further includes the following steps S710 and S720, which are described in detail below:

[0078] Step S710: If the target air outlet temperature of the heat pump air conditioning system is lower than the actual air outlet temperature, then obtain the exhaust temperature of the heat pump air conditioning system and the corresponding pressure value of the compressor.

[0079] Step S720: If the exhaust temperature reaches or exceeds the preset exhaust temperature threshold and / or the pressure value corresponding to the compressor reaches or exceeds the preset compressor pressure threshold, then control the compressor to decelerate according to a preset ratio.

[0080] Specifically, continuing from the above embodiments, if the actual outlet air temperature of the heat pump air conditioning system at the current moment is lower than the target outlet air temperature, then further, by acquiring the exhaust temperature of the heat pump air conditioner and the pressure value of the compressor at the current moment, if it is detected that the exhaust temperature of the heat pump air conditioning system reaches or exceeds a preset exhaust temperature threshold, the compressor can be controlled to decelerate according to a preset ratio, thereby reducing the work done by the compressor, so that the actual outlet air temperature of the heat pump air conditioner is close to the target temperature of the heat pump air conditioner while avoiding resource waste. On the other hand, if it is detected that the pressure of the compressor at the current moment is greater than a preset pressure threshold, the compressor can be controlled to decelerate according to a preset ratio, so that the actual outlet air temperature of the heat pump air conditioner is close to the target temperature of the heat pump air conditioner while avoiding resource waste. In addition, if it is detected that the exhaust temperature reaches or exceeds a preset exhaust temperature threshold and the pressure value of the compressor reaches or exceeds a preset pressure threshold, the compressor is controlled to decelerate according to a preset ratio, so that the actual outlet air temperature of the heat pump air conditioner is close to the target temperature of the heat pump air conditioner while avoiding resource waste.

[0081] In this embodiment, if the target air outlet temperature of the heat pump air conditioning system is lower than the actual air outlet temperature during the heating process, the compressor can be controlled to decelerate according to a preset ratio, so that the actual air outlet temperature of the heat pump air conditioning is close to the target temperature of the heat pump air conditioning while avoiding resource waste.

[0082] Furthermore, based on the above embodiments, in one of the exemplary embodiments provided in this application, the heat pump air conditioning system further includes a first large-diameter electronic expansion valve 13, which is disposed between the external heat exchanger 6 and the internal heat exchanger 3.

[0083] like Figure 8 As shown, the specific implementation process of controlling the heat pump air conditioning system to enter the corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler may further include steps S810 to S830, which are detailed below:

[0084] Step S810: If the real-time temperature of the heat pump air conditioning system is within the preset temperature range, the real-time temperature of the heat pump air conditioning system reaches or exceeds the preset temperature threshold, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is less than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter the first heating mode. The first heating mode includes: controlling the first solenoid valve to close, the second solenoid valve to open, and the first large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit.

[0085] Specifically, if the real-time temperature of the heat pump air conditioning system is detected to be within the preset temperature range, and the heating power required by the heat pump air conditioning system to reach the user's target temperature is less than the preset heating power, and the inlet water temperature of the refrigerant in the heat pump air conditioning system is less than the preset temperature threshold, then the heat pump air conditioning system can be controlled to enter the first heating mode. The first heating mode includes controlling the first solenoid valve to close, the second solenoid valve to open, and the first large-diameter electronic expansion valve to open, thereby forming... Figure 9 The corresponding heating circuit is shown.

[0086] For example, in some feasible embodiments, the first heating mode described above can be an air source heating mode. The air source heat pump mode includes: a pump is a work tool that increases potential energy. Based on the principle of energy conservation, it makes energy flow in the reverse direction from low to high by doing work. An air source heat pump is also called a wind-cooled heat pump. Its working principle is a reverse Carnot cycle. It only needs a small amount of electrical energy to drive the compressor to compress and rub the air at a low temperature, so that it is heated. This deteriorated air condenses when it encounters cold air and then evaporates to dissipate heat. The cycle is repeated, thereby extracting the heat energy in the air for direct use, thereby achieving the effect of vehicle heating.

[0087] Furthermore, in some feasible embodiments, when the real-time temperature of the heat pump air conditioning system is within the temperature range of -12°C to 5°C, and the heating power of the heat pump air conditioning is less than or equal to 3500W, and the inlet water temperature of the cooler is less than 5°C, the heat pump air conditioning can be controlled to enter the first heating mode. In this way, the purpose of rapid heating can be achieved by controlling the opening and closing of the solenoid valve and the opening degree of the expansion valve in the heat pump air conditioning system under the first heating mode.

[0088] Step S820: Calculate the target subcooling of the heat pump air conditioning system in the first heating mode.

[0089] Step S830: Obtain the actual subcooling of the heat pump air conditioning system, and determine the opening value of the first large-diameter electronic expansion valve based on the subcooling difference between the target subcooling and the actual subcooling.

[0090] It should be noted that in a saturated state, each saturation pressure corresponds to a saturation temperature. When the vapor temperature is higher than the saturation temperature at this pressure, the vapor is said to be superheated, and the difference between the temperature of this superheated vapor and the saturation temperature at the current pressure is the degree of superheat. Similarly, when the liquid temperature is lower than the saturation temperature at this pressure, the liquid is said to be supercooled, and the difference between the saturation temperature at the current pressure and the temperature of this supercooled liquid is the degree of supercooling. Here, saturation refers to a state where the liquid and gas are in dynamic equilibrium, and the liquid and gas in a saturated state have the same temperature.

[0091] First, the target subcooling of the heat pump air conditioning system in the first heating mode is calculated, and the actual subcooling of the heat pump air conditioning at the current moment is obtained. Thus, the subcooling difference of the heat pump air conditioning in the current mode can be calculated. Based on the subcooling difference between the target subcooling and the actual subcooling in the current heating mode, the opening value of the first large-diameter electronic expansion valve is determined.

[0092] In this embodiment, if the real-time temperature of the heat pump air conditioning system is within the preset temperature range, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is less than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter the first heating mode. The first heating mode includes: controlling the first solenoid valve to close, the second solenoid valve to open, and the first large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit. By controlling the opening of the solenoid valve and the expansion valve in the heat pump air conditioning system, as well as the opening degree of the expansion valve, rapid heating is achieved while saving energy consumption and improving the user experience.

[0093] Furthermore, based on the above embodiments, in one of the exemplary embodiments provided in this application, the heat pump air conditioning system further includes a small-diameter electronic expansion valve 15, which is disposed in the pipeline between the refrigerator 4 and the first one-way valve 7 to form a corresponding heating circuit.

[0094] In some feasible embodiments, such as Figure 10 As shown, the specific implementation process of controlling the heat pump air conditioning system to enter the corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler may further include steps S1010 to S1030, which are described in detail below:

[0095] Step S1010: If the real-time temperature of the heat pump air conditioning system is within the preset temperature range, the real-time temperature of the heat pump air conditioning system does not reach the preset temperature threshold, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is greater than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter the second heating mode. The second heating mode includes: controlling the first solenoid valve to open, controlling the second solenoid valve to close, and controlling the small-diameter electronic expansion valve to close, so as to form a corresponding heating circuit.

[0096] Specifically, if the real-time temperature of the heat pump air conditioning system is detected to be within the preset temperature range, and the heating power required by the heat pump air conditioning system to reach the user's target temperature is less than the preset heating power, and the inlet water temperature of the refrigerant in the heat pump air conditioning system is greater than the preset temperature threshold, then the heat pump air conditioning system can be controlled to enter a second heating mode. This second heating mode includes controlling the opening of the first solenoid valve, the closing of the second solenoid valve, and the opening of the small-diameter electronic expansion valve, thereby forming the second heating mode as shown below. Figure 11 The heating circuit shown.

[0097] In some feasible embodiments, the second heating mode can be a water source heat pump mode. As described in the above embodiments, high-temperature, high-pressure refrigerant gas exits from the compressor and enters the condenser. The refrigerant releases heat into the hot water supply, cooling it into a high-pressure liquid and raising the temperature of the hot water. The refrigerant then expands through the expansion valve into a low-temperature, low-pressure liquid, entering the evaporator to absorb heat from the low-temperature heat source water, evaporating into low-pressure vapor and lowering the temperature of the low-temperature heat source water. The low-pressure refrigerant vapor then enters the compressor and is compressed into a high-temperature, high-pressure gas. This cycle continues to generate hot water, achieving the purpose of heating the vehicle.

[0098] Furthermore, in some feasible embodiments, when the real-time temperature of the heat pump air conditioning system is within the temperature range of -12°C to 5°C, and the heating power of the heat pump air conditioning is less than or equal to 3500W, and the inlet water temperature of the cooler is greater than 5°C, the heat pump air conditioning can be controlled to enter the first heating mode. In this way, the purpose of rapid heating can be achieved by controlling the opening and closing of the solenoid valve and the opening degree of the expansion valve in the heat pump air conditioning system under the first heating mode.

[0099] Step S1020: Calculate the target subcooling of the heat pump air conditioning system in the second heating mode;

[0100] Step S1030: Obtain the actual subcooling of the heat pump air conditioning system, and determine the opening value of the small-diameter electronic expansion valve based on the subcooling difference between the target subcooling and the actual subcooling.

[0101] Furthermore, the target subcooling degree of the heat pump air conditioning system under the second heating mode is calculated. As mentioned in the above embodiment, the target subcooling degree is the liquid temperature when it is lower than the saturation temperature at this pressure under the second heating mode. The difference between the saturation temperature at the current pressure and the subcooled liquid temperature is the subcooling degree.

[0102] Therefore, by calculating the difference between the actual subcooling and the target subcooling of the heat pump air conditioner at the current moment, the opening value of the small-diameter electronic expansion valve can be determined based on this difference. This allows the heat pump air conditioning system to heat up quickly and ensure heating efficiency by controlling the opening of the small-diameter electronic expansion valve.

[0103] In this embodiment, if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is greater than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter a second heating mode. The second heating mode includes: controlling the first solenoid valve to open, controlling the second solenoid valve to close, and controlling the small-diameter electronic expansion valve to close, so as to form a corresponding heating circuit. By controlling the opening of the solenoid valve and the expansion valve in the heat pump air conditioning system, as well as the opening degree of the expansion valve, rapid heating is achieved while saving energy consumption and improving the user experience.

[0104] Furthermore, based on the above embodiments, in one of the exemplary embodiments provided in this application, the heat pump air conditioning system further includes: a second large-diameter electronic expansion valve 14, one end of which is connected to the pipeline between the in-vehicle heat exchanger 3 and the compressor 2, and the other end is connected between the first one-way valve 7 and the cooler 4.

[0105] like Figure 12 As shown, the specific implementation process of controlling the heat pump air conditioning system to enter the corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler may further include steps S1210 to S1230, which are described in detail below:

[0106] Step S1210: If the heat pump air conditioning system cannot enter the first heating mode and the second heating mode, then control the heat pump air conditioning system to enter the third heating mode. The third heating mode includes: controlling the first solenoid valve to close, controlling the second solenoid valve to close, controlling the small-diameter electronic expansion valve to open, and controlling the second large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit.

[0107] Specifically, as described in the above embodiments, if the current operating data of the heat pump air conditioning system indicates that the system cannot enter either the first or second heating mode, then the system can be controlled to enter a third heating mode. This third heating mode includes controlling the first solenoid valve to close, controlling the second solenoid valve to close, controlling the small-diameter electronic expansion valve to open, and controlling the second large-diameter electronic expansion valve to open, to form a... Figure 13 The heating circuit shown.

[0108] Step S1220: In the third heating mode, calculate the target pressure value of the heat pump air conditioning system;

[0109] Step S1230: Obtain the real-time pressure value of the heat pump air conditioning system, and determine the opening value of the second large-diameter electronic expansion valve based on the pressure difference between the target pressure value and the real-time pressure value.

[0110] Specifically, in the third heating mode of the heat pump air conditioner, the target pressure value of the heat pump air conditioner system is calculated, and the real-time pressure value of the heat pump air conditioner system at the current moment is obtained. Thus, the pressure difference between the real-time pressure value and the target pressure value of the heat pump system at the current moment can be calculated. Based on the pressure difference between the real-time pressure value and the target pressure value, the opening value of the second large-diameter electronic expansion valve can be determined, thereby enabling the heat pump air conditioner system to heat up quickly. Even in low-temperature environments, the vehicle's air conditioning system can heat up quickly, avoiding slow heating rate and poor heating effect of the heat pump air conditioner system, which would affect the user experience.

[0111] For example, in one feasible embodiment, if the real-time temperature of the heat pump air conditioning system is detected to be outside the temperature range of -12°C to 5°C, and the heating power of the heat pump air conditioning exceeds 3500W, and the inlet water temperature of the cooler is much greater than 5°C, then it is determined that the heat pump air conditioning system does not meet the conditions for entering the first heating mode or the conditions for entering the second heating mode. Therefore, the heat pump air conditioning system can be controlled to enter the third heating mode. In this way, the purpose of rapid heating can be achieved by controlling the opening and closing of the solenoid valve and the opening degree of the expansion valve in the heat pump air conditioning system in the third heating mode.

[0112] In this embodiment, if the real-time operating data of the heat pump air conditioning system at the current moment indicates that the heat pump air conditioning system cannot enter either the first heating mode or the second heating mode, then the heat pump air conditioning system is controlled to enter the third heating mode. In the third heating mode, the real-time pressure value of the heat pump air conditioning system is obtained, and the opening value of the second large-diameter electronic expansion valve is determined based on the pressure difference between the target pressure value and the real-time pressure value. Thus, by controlling the opening and closing of the solenoid valve and the opening degree of the expansion valve in the heat pump air conditioning system in the third heating mode, the purpose of rapid heating is achieved.

[0113] Furthermore, based on the above embodiments, please refer to... Figure 14 In one exemplary embodiment provided in this application, the specific implementation process of the above-described heat pump air conditioning system method may further include the following steps S1410 and S1420, which are described in detail below:

[0114] Step S1410: If the real-time pressure value of the heat pump air conditioning system is greater than the preset pressure threshold of the heat pump air conditioning system, then calculate the pressure difference between the real-time pressure value of the heat pump air conditioning system and the preset pressure threshold of the heat pump air conditioning system.

[0115] Step S1420: Reduce the opening value of the second largest diameter electronic expansion valve according to a preset ratio based on the pressure difference.

[0116] Specifically, considering the internal pressure of the heat pump air conditioning system, in the third heating mode of the heat pump air conditioning system, if the real-time pressure value of the heat pump air conditioning system is detected to be greater than the preset pressure threshold, the pressure difference between the current real-time pressure value and the pressure threshold is calculated. Based on this pressure difference, without affecting the normal heating operation of the heat pump air conditioning system, the opening value of the second-diameter electronic valve is reduced according to a preset ratio. This ensures that the heat pump air conditioning system can provide heating normally within the preset operating condition threshold range.

[0117] In this embodiment, when the real-time pressure value of the heat pump air conditioning system exceeds a preset pressure threshold, the opening value of the second-diameter electronic valve is reduced by a preset ratio based on the pressure difference without affecting the normal heating operation of the heat pump air conditioning system. This allows the heat pump air conditioning system to operate normally within the preset operating condition threshold range, improving the heating rate of the heat pump air conditioning system and enhancing the user experience.

[0118] For further details, please refer to Figure 15 In one of the exemplary embodiments provided in this application, the heat pump air conditioning system further includes: a first sensor 10, which is disposed in the pipeline between the compressor 2 and the in-vehicle heat exchanger 3; a second sensor 11, which is disposed in the pipeline between the gas-liquid separator 1 and the refrigerator 4; and a third sensor 12, which is connected to the external water circulation system 200.

[0119] Furthermore, the specific implementation process of the above-mentioned control method for the heat pump air conditioning system may also include the following steps, which are detailed below:

[0120] The system uses a third sensor to collect the temperature of the external water circulation system. If the temperature of the external circulating water exceeds a preset temperature threshold, the system either increases the water flow rate in the chiller or stops the chiller from operating. This prevents problems caused by excessively high external circulating water temperatures.

[0121] Figure 16 This is a simplified flowchart illustrating heat pump air conditioning control in an exemplary application scenario. Figure 16In the application scenario shown, under the vehicle's heating mode, the target heating temperature is determined, and the heating power required by the heat pump air conditioning system to reach the target temperature is calculated. Then, the heating mode of the heat pump system is determined by obtaining the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant. Specifically, if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the refrigerant is less than a preset temperature threshold, then the heat pump air conditioning system is controlled to enter the first heating mode. The first heating mode includes: controlling the first solenoid valve to close, controlling the second solenoid valve to open, and controlling the first large-diameter electronic expansion valve to open, to form a corresponding heating circuit; if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the refrigerant is greater than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter the second heating mode. The system operates in two heating modes. The second heating mode includes controlling the opening of the first solenoid valve, controlling the closing of the second solenoid valve, and controlling the opening and closing of the small-diameter electronic expansion valve to form a corresponding heating circuit. If the heat pump air conditioning system cannot enter the first or second heating mode, it is controlled to enter a third heating mode. The third heating mode includes controlling the closing of the first solenoid valve, controlling the closing of the second solenoid valve, controlling the opening of the small-diameter electronic expansion valve, and controlling the opening of the second large-diameter electronic expansion valve to form a corresponding heating circuit. For detailed implementation processes, please refer to the descriptions in the aforementioned embodiments, which will not be repeated here.

[0122] Figure 17 This is a block diagram illustrating a control device for a heat pump air conditioning system, as shown in an exemplary embodiment of this application. This device can be applied to… Figure 4 The implementation environment shown is specifically configured in the smart terminal 410. This device can also be applied to other exemplary implementation environments and specifically configured in other devices. This embodiment does not limit the implementation environment to which the device is applicable.

[0123] like Figure 17 As shown, the control device of this exemplary heat pump air conditioning system includes:

[0124] The first acquisition module 1710 is used to acquire the target temperature of vehicle heating under the vehicle heating program; the calculation module 1720 is used to calculate the heating power of the heat pump air conditioning system based on the target temperature; the second acquisition module 1730 is used to acquire the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system; the determination module 1740 is used to determine the corresponding heating mode of the heat pump air conditioning system based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant.

[0125] According to one aspect of the embodiments of this application, the control device of the above-mentioned heat pump air conditioning system further includes: a temperature calculation module, used to calculate the target air outlet temperature of the heat pump air conditioning system corresponding to the current heating mode; and a temperature acquisition module, used to acquire the actual air outlet temperature of the heat pump air conditioning system, so as to calculate the target speed of the target compressor based on the temperature difference between the target air outlet temperature and the actual air outlet temperature.

[0126] According to one aspect of the embodiments of this application, the control device of the above-mentioned heat pump air conditioning system further includes: a pressure acquisition module, used to acquire the exhaust temperature of the heat pump air conditioning system and the pressure value corresponding to the compressor if the target exhaust temperature of the heat pump air conditioning system is less than the actual exhaust temperature; and a deceleration processing module, used to control the compressor to decelerate according to a preset ratio if the exhaust temperature reaches or exceeds a preset exhaust temperature threshold and / or the pressure value corresponding to the compressor reaches or exceeds a preset compressor pressure threshold.

[0127] According to one aspect of the embodiments of this application, the aforementioned determining module 1740 specifically includes: a first control unit, configured to control the heat pump air conditioning system to enter a first heating mode if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the real-time temperature of the heat pump air conditioning system reaches or exceeds a preset temperature threshold, the heating power of the heat pump air conditioning system is less than a preset heating power, and the inlet water temperature of the cooler is less than a preset temperature threshold; the first heating mode includes: controlling the first solenoid valve to close, the second solenoid valve to open, and the first large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit; a first subcooling calculation unit, configured to calculate the target subcooling of the heat pump air conditioning system in the first heating mode; and a first opening value determining unit, configured to obtain the actual subcooling of the heat pump air conditioning system, so as to determine the opening value of the first large-diameter electronic expansion valve based on the subcooling difference between the target subcooling and the actual subcooling.

[0128] According to one aspect of the embodiments of this application, the aforementioned determining module 1740 specifically includes: a second control unit, configured to control the heat pump air conditioning system to enter a second heating mode if the real-time temperature of the heat pump air conditioning system is within a preset temperature range, the real-time temperature of the heat pump air conditioning system does not reach a preset temperature threshold, the heating power of the heat pump air conditioning system is less than a preset heating power, and the inlet water temperature of the cooler is greater than a preset temperature threshold; the second heating mode includes: controlling the first solenoid valve to open, the second solenoid valve to close, and the small-diameter electronic expansion valve to open, so as to form a corresponding heating circuit; a second subcooling calculation unit, configured to calculate the target subcooling of the heat pump air conditioning system in the second heating mode; and a second opening value determining unit, configured to obtain the actual subcooling of the heat pump air conditioning system, so as to determine the opening value of the small-diameter electronic expansion valve based on the subcooling difference between the target subcooling and the actual subcooling.

[0129] According to one aspect of the embodiments of this application, the aforementioned determining module 1740 specifically includes: a third control unit, used to control the heat pump air conditioning system to enter a third heating mode if the heat pump air conditioning system cannot enter the first heating mode and the second heating mode, the third heating mode including: controlling the first solenoid valve to close, the second solenoid valve to close, the small-diameter electronic expansion valve to open, and the second large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit; a pressure calculation unit, used to calculate the target pressure value of the heat pump air conditioning system in the third heating mode; and a third opening value determining unit, used to obtain the real-time pressure value of the heat pump air conditioning system, so as to determine the opening value of the second large-diameter electronic expansion valve based on the pressure difference between the target pressure value and the real-time pressure value.

[0130] According to one aspect of the embodiments of this application, the control device of the above-mentioned heat pump air conditioning system further includes: a pressure difference calculation module, used to calculate the pressure difference between the real-time pressure value of the heat pump air conditioning system and the preset pressure threshold of the heat pump air conditioning system if the real-time pressure value of the heat pump air conditioning system is greater than the preset pressure threshold of the heat pump air conditioning system; and an opening value adjustment module, used to reduce the opening value of the second large-diameter electronic expansion valve according to a preset ratio based on the pressure difference.

[0131] It should be noted that the control device for the heat pump air conditioning system provided in the above embodiments and the control method for the heat pump air conditioning system provided in the above embodiments belong to the same concept. The specific ways in which each module and unit performs operations have been described in detail in the method embodiments, and will not be repeated here. In practical applications, the control device for the heat pump air conditioning system provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above, and this is not a limitation here.

[0132] According to one aspect of the present application, a vehicle is provided, the vehicle including a control device for a heat pump air conditioning system as described above.

[0133] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the control method of the heat pump air conditioning system provided in the above embodiments.

[0134] Figure 18 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 18 The computer system 1800 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0135] like Figure 18 As shown, the computer system 1800 includes a Central Processing Unit (CPU) 1801, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on a program stored in Read-Only Memory (ROM) 1802 or a program loaded from storage portion 1808 into Random Access Memory (RAM) 1803. The RAM 1803 also stores various programs and data required for system operation. The CPU 1801, ROM 1802, and RAM 1803 are interconnected via a bus 1804. An Input / Output (I / O) interface 1805 is also connected to the bus 1804.

[0136] The following components are connected to I / O interface 1805: an input section 1806 including a keyboard, mouse, etc.; an output section 1807 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1808 including a hard disk, etc.; and a communication section 1809 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1809 performs communication processing via a network such as the Internet. A drive 1810 is also connected to I / O interface 1805 as needed. Removable media 1811, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1810 as needed so that computer programs read from them can be installed into storage section 1808 as needed.

[0137] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1809, and / or installed from removable medium 1811. When the computer program is executed by central processing unit (CPU) 1801, it performs various functions defined in the system of this application.

[0138] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0139] 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. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains 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 a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, 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.

[0140] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0141] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the control method for the heat pump air conditioning system as described above. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not incorporated into the electronic device.

[0142] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the control method for the heat pump air conditioning system provided in the various embodiments described above.

[0143] The above description is merely a preferred exemplary embodiment of this application and is not intended to limit the implementation of this application. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of this application. Therefore, the scope of protection of this application should be determined by the scope of protection claimed in the claims.

Claims

1. A heat pump air conditioning system, characterised in that, The system includes: A gas-liquid separator and a compressor, wherein the gas-liquid separator is connected to the compressor. An in-vehicle heat exchanger, wherein the in-vehicle heat exchanger is connected to the compressor; A refrigeration unit, which is connected to the vehicle interior heat exchanger and a gas-liquid separator; A first solenoid valve is located between the in-vehicle heat exchanger and the refrigeration unit, and the refrigeration unit is connected to an external water circulation system. An external heat exchanger, one end of which is connected to the pipeline between the first solenoid valve and the internal heat exchanger, and the other end of which is connected to the pipeline between the first solenoid valve and the refrigerator. A first check valve is located in the pipeline between the first solenoid valve and the external heat exchanger. The second solenoid valve has one end connected to the pipeline between the external heat exchanger and the first check valve, and the other end connected to the pipeline between the gas-liquid separator and the refrigerator. The second one-way valve is located in the pipeline between the second solenoid valve and the gas-liquid separator; The heat pump air conditioning system is used for: If the real-time temperature of the heat pump air conditioning system is outside the preset temperature range, and the heating power of the heat pump air conditioning system is not less than the preset heating power, then the heat pump air conditioning system is controlled to enter the third heating mode. The third heating mode includes: controlling the first solenoid valve to close, the second solenoid valve to close, the small-diameter electronic expansion valve to open, and the second large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit. The small-diameter electronic expansion valve is located in the pipeline between the refrigerator and the first one-way valve. One end of the second large-diameter electronic expansion valve is connected to the pipeline between the in-vehicle heat exchanger and the compressor, and the other end is connected between the first one-way valve and the refrigerator. In the third heating mode, the target pressure value of the heat pump air conditioning system is calculated; The real-time pressure value of the heat pump air conditioning system is obtained, and the opening value of the second large-diameter electronic expansion valve is determined based on the pressure difference between the target pressure value and the real-time pressure value.

2. A control method of a heat pump air conditioning system, characterized by, Applied to the heat pump air conditioning system as described in claim 1, comprising: Under the vehicle heating program, the target temperature for vehicle heating is obtained; Calculate the heating power of the heat pump air conditioning system based on the target temperature; The real-time temperature of the heat pump air conditioning system and the inlet water temperature of the refrigerant in the heat pump air conditioning system are obtained. Based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the cooler, the heat pump air conditioning system is controlled to enter the corresponding heating mode.

3. The method of claim 2, wherein, The method further includes: Calculate the target outlet air temperature of the heat pump air conditioning system under the current heating mode; The actual air outlet temperature of the heat pump air conditioning system is obtained, and the target speed of the target compressor is calculated based on the temperature difference between the target air outlet temperature and the actual air outlet temperature.

4. The method of claim 3, wherein, The method further includes: If the target outlet air temperature of the heat pump air conditioning system is less than the actual outlet air temperature, then the exhaust temperature of the heat pump air conditioning system and the pressure value corresponding to the compressor are obtained. If the exhaust temperature reaches or exceeds a preset exhaust temperature threshold and / or the pressure value corresponding to the compressor reaches or exceeds a preset compressor pressure threshold, then the compressor is controlled to decelerate according to a preset ratio.

5. The method of claim 2, wherein, The heat pump air conditioning system also includes a first large-diameter electronic expansion valve, which is located between the external heat exchanger and the internal heat exchanger. The method of controlling the heat pump air conditioning system to enter the corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler includes: If the real-time temperature of the heat pump air conditioning system is within the preset temperature range, the real-time temperature of the heat pump air conditioning system reaches or exceeds the preset temperature threshold, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is less than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter the first heating mode. The first heating mode includes: controlling the first solenoid valve to close, the second solenoid valve to open, and the first large-diameter electronic expansion valve to open, so as to form a corresponding heating circuit. Calculate the target subcooling of the heat pump air conditioning system under the first heating mode; The actual subcooling of the heat pump air conditioning system is obtained, and the opening value of the first large-diameter electronic expansion valve is determined based on the subcooling difference between the target subcooling and the actual subcooling.

6. The method of claim 5, wherein, The method of controlling the heat pump air conditioning system to enter the corresponding heating mode based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler includes: If the real-time temperature of the heat pump air conditioning system is within the preset temperature range, the real-time temperature of the heat pump air conditioning system does not reach the preset temperature threshold, the heating power of the heat pump air conditioning system is less than the preset heating power, and the inlet water temperature of the cooler is greater than the preset temperature threshold, then the heat pump air conditioning system is controlled to enter the second heating mode. The second heating mode includes: controlling the first solenoid valve to open, the second solenoid valve to close, and the small-diameter electronic expansion valve to open, so as to form a corresponding heating circuit. Calculate the target subcooling of the heat pump air conditioning system in the second heating mode; The actual subcooling of the heat pump air conditioning system is obtained, and the opening value of the small-diameter electronic expansion valve is determined based on the subcooling difference between the target subcooling and the actual subcooling.

7. The method of claim 6, wherein, The method further includes: If the real-time pressure value of the heat pump air conditioning system is greater than the preset pressure threshold of the heat pump air conditioning system, then the pressure difference between the real-time pressure value of the heat pump air conditioning system and the preset pressure threshold of the heat pump air conditioning system is calculated. Based on the pressure difference, the opening value of the second large-diameter electronic expansion valve is reduced according to a preset ratio.

8. A control device for a heat pump air conditioning system, characterized by The device, applied to the heat pump air conditioning system as described in claim 1, comprises: The first acquisition module is used to acquire the target temperature of the vehicle heating program. The calculation module is used to calculate the heating power of the heat pump air conditioning system based on the target temperature; The second acquisition module is used to acquire the real-time temperature of the heat pump air conditioning system and the inlet water temperature of the cooler in the heat pump air conditioning system. The determination module is used to determine the heating mode corresponding to the heat pump air conditioning system based on the heating power of the heat pump air conditioning system, the real-time temperature of the heat pump air conditioning system, and the inlet water temperature of the cooler.

9. A vehicle characterized by comprising: The vehicle includes a control device for the heat pump air conditioning system as described in claim 8.

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