Vehicle-mounted refrigerator system, control method and vehicle

Abstract

The embodiment of the invention provides a vehicle-mounted refrigerator system, a control method and a vehicle. The vehicle-mounted refrigerator system comprises a first refrigerant pipeline and a second refrigerant pipeline, wherein an electric compressor and a water-cooled condenser are arranged on the first refrigerant pipeline; the second refrigerant pipeline is provided with a vehicle-mounted refrigerator, and the second refrigerant pipeline is communicated with the first refrigerant pipeline; an evaporator is arranged on the third refrigerant pipeline; the second refrigerant pipeline is further provided with at least one pressure adjusting pump used for adjusting the pressure of the second refrigerant pipeline. According to the embodiment of the invention, the first refrigerant pipeline, the second refrigerant pipeline and the third refrigerant pipeline are designed, and at least one pressure regulating pump is integrated on the second refrigerant pipeline, so that the refrigerant pressure of the vehicle-mounted refrigerator loop is dynamically regulated, the coordination when the air conditioning system and the vehicle-mounted refrigerator work at the same time is ensured, and the service life of the vehicle-mounted refrigerator loop is prolonged. And the reliability of the vehicle refrigerating system is ensured.

Description

Technical Field

[0001] This application relates to the field of refrigerator system technology, and more specifically, to a vehicle-mounted refrigerator system, control method, and vehicle. Background Technology

[0002] With the increasing popularity and development of new energy vehicles, in-vehicle refrigerators are also being used more and more in these vehicles to provide passengers with cooling, insulation, and heating services for food and beverages. Currently, in-vehicle refrigerators utilize various technologies, including semiconductor refrigerators, independent compressor refrigerators, and shared compressor refrigerators. As customers' requirements for refrigerator performance, noise levels, energy consumption, and heat hazards become increasingly stringent, the shared compressor refrigerator solution is gradually becoming the mainstream. The shared compressor solution essentially eliminates the compressor integrated into the original independent compressor solution, utilizing the existing compressor in the vehicle's air conditioning system to provide cooling. However, in the shared compressor in-vehicle refrigerator solution, the refrigerator's cooling temperature is lower, and compared to the air conditioning circuit, the refrigerant pressure in the refrigerator circuit is lower. This can lead to pressure mismatch issues when both circuits are operating simultaneously.

[0003] No effective solution has yet been proposed to address the aforementioned technical issues. Summary of the Invention

[0004] The main objective of this invention is to provide a vehicle-mounted refrigerator system, control method, and vehicle to solve the problem of pressure mismatch between the refrigerator circuit and the air conditioning circuit in the prior art.

[0005] This application provides a vehicle-mounted refrigerator system, including: a first refrigerant pipeline, on which an electric compressor and a water-cooled condenser are installed; a second refrigerant pipeline, on which a vehicle-mounted refrigerator is installed, and the second refrigerant pipeline is connected to the first refrigerant pipeline; a third refrigerant pipeline, on which an evaporator is installed, and the third refrigerant pipeline is connected to the first refrigerant pipeline and is connected in parallel with the second refrigerant pipeline; wherein, at least one pressure regulating pump is also installed on the second refrigerant pipeline, the pressure regulating pump being used to regulate the pressure of the second refrigerant pipeline.

[0006] Furthermore, there are two third refrigerant lines, which are connected in parallel. One of the third refrigerant lines is connected to the first refrigerant line to form a front air conditioning circuit, and the other third refrigerant line is connected to the first refrigerant line to form a rear air conditioning circuit.

[0007] Furthermore, the vehicle-mounted refrigerator system also includes: a fourth refrigerant line, a cooler installed on the fourth refrigerant line, the fourth refrigerant line being connected to the first refrigerant line, and the fourth refrigerant line being connected in parallel with the second and third refrigerant lines.

[0008] Furthermore, the vehicle-mounted refrigerator system also includes: a first coolant line, on which at least one of a battery and an electric drive is disposed, the coolant line is connected to a cooler, and the first coolant line is used for heat exchange between the battery and the electric drive.

[0009] Furthermore, the vehicle refrigerator system also includes: a second coolant line, on which a heater core is installed, and the second coolant line is connected to a water-cooled condenser; and a heat dissipation assembly, which includes a radiator and a cooling fan, with the radiator installed on the second coolant line and the cooling fan located close to the radiator.

[0010] Furthermore, according to the aforementioned vehicle-mounted refrigerator system, both the inlet and outlet ends of the pressure regulating pump are equipped with PT sensors.

[0011] According to another aspect of the invention, a control method for an in-vehicle refrigerator system is provided. This method controls the aforementioned in-vehicle refrigerator system and includes the following steps: obtaining a target operating mode of the in-vehicle refrigerator system; if the target operating mode is determined to be a simultaneous cooling mode of the air conditioner and refrigerator, generating a first operating strategy, the first operating strategy including at least connecting a first refrigerant line to a second refrigerant line and a third refrigerant line, and turning on the electric compressor, water-cooled condenser, evaporator, and in-vehicle refrigerator; if the target operating mode is determined to be a refrigerator-only cooling mode, generating a second operating strategy, the second operating strategy including at least connecting the first refrigerant line to the second refrigerant line, and turning on the electric compressor, water-cooled condenser, and in-vehicle refrigerator; if the target operating mode is determined to be an air conditioner-only cooling mode, generating a third operating strategy, the third operating strategy including at least connecting the first refrigerant line to the third refrigerant line, and turning on the electric compressor, water-cooled condenser, and evaporator; executing any one of the first, second, and third operating strategies to put the in-vehicle refrigerator system in the target operating mode.

[0012] Furthermore, the method also includes: when it is determined that the vehicle refrigerator system is in a simultaneous air conditioning and refrigerator cooling mode, acquiring the refrigerant pressure of the second refrigerant line and the refrigerant pressure of the third refrigerant line; when it is determined that the refrigerant pressure difference between the refrigerant pressure of the second refrigerant line and the refrigerant pressure of the third refrigerant line meets the preset adjustment conditions, generating a fourth working strategy based on the refrigerant pressure difference, the fourth working strategy including at least adjusting the working state of the pressure regulating pump; and executing the fourth working strategy to make the refrigerant pressure difference within the preset pressure difference range.

[0013] Furthermore, the method also includes: when it is determined that the vehicle refrigerator system is in refrigerator stand-alone cooling mode, obtaining the speed of the electric compressor and the cooling capacity of the vehicle refrigerator; when it is determined that the electric compressor is within a preset speed range and the cooling capacity of the vehicle refrigerator is within a preset excess range, generating a fifth operating strategy, the fifth operating strategy including at least shutting down the electric compressor, connecting the second refrigerant line and the third refrigerant line, and adjusting the operating state of the pressure regulating pump; executing the fifth operating strategy to make the second refrigerant line and the third refrigerant line form a refrigerator cooling circuit.

[0014] According to another aspect of the present invention, a vehicle is provided, including an on-board refrigerator system, wherein the on-board refrigerator system is the one described above.

[0015] By adopting the technical solution of this application, a first refrigerant pipeline, a second refrigerant pipeline, and a third refrigerant pipeline are designed, and at least one pressure regulating pump is integrated into the second refrigerant pipeline. The pressure in the pipeline can be dynamically adjusted according to the system requirements, thereby realizing the dynamic adjustment of the refrigerant pressure in the vehicle refrigerator circuit. This ensures the coordination between the air conditioning system and the vehicle refrigerator when they work simultaneously, and ensures the high efficiency and reliability of the vehicle refrigeration system. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the architecture of the first embodiment of the adjustable pressure vehicle refrigerator system.

[0018] Figure 2 This is a schematic diagram of the architecture of a second embodiment of an adjustable pressure vehicle refrigerator system;

[0019] Figure 3 This is a schematic diagram of the architecture of a third embodiment of an adjustable pressure vehicle refrigerator system;

[0020] Figure 4 This is a schematic diagram of the architecture of the fourth embodiment of an adjustable pressure vehicle refrigerator system;

[0021] Figure 5 This is a flowchart illustrating an embodiment of the control method for an in-vehicle refrigerator system according to this application.

[0022] The above figures include the following reference numerals:

[0023] 1. Electric compressor; 2. Compressor outlet PT sensor; 3. Water-cooled condenser; 4. Receiver tank; 5. Refrigerator inlet electronic expansion valve; 6. Vehicle refrigerator; 7. Refrigerator outlet PT sensor; 8. Pressure regulating pump; 9. Pressure regulating pump outlet PT sensor; 10. Front air conditioning unit evaporator inlet electronic expansion valve; 11. Front air conditioning unit evaporator; 12. Front air conditioning unit evaporator outlet PT sensor; 13. Compressor inlet PT sensor; 14. Rear air conditioning unit evaporator inlet electronic expansion valve; 15. Rear air conditioning unit evaporator; 16. Rear air conditioning unit evaporator outlet PT sensor; 17. Cooler inlet electronic expansion valve; 18. Cooler; 19. Cooler outlet PT sensor; 20. Battery water pump; 21. Battery; 22. Electric drive; 23. Heater water pump; 24. Heater core; 25. Radiator; 26. Cooling fan. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0028] Currently, vehicle-mounted refrigerators utilize various technologies, including semiconductor refrigerators, independent compressor refrigerators, and shared compressor refrigerators. As customer demands for refrigerator performance, noise levels, energy consumption, and heat hazards increase, the shared compressor refrigerator solution is gradually becoming the mainstream. The shared compressor solution essentially eliminates the compressor included in the original independent compressor solution, utilizing the existing compressor in the vehicle's air conditioning system to provide cooling. The shared compressor vehicle-mounted refrigerator solution currently has the following main problems: 1. The cooling temperature of the vehicle-mounted refrigerator is low. Compared to the air conditioning circuit, the refrigerant pressure in the refrigerator circuit is lower, leading to pressure mismatch when both circuits operate simultaneously; 2. The vehicle's compressor has a strong cooling capacity, while the vehicle-mounted refrigerator requires less cooling. When the vehicle-mounted refrigerator operates alone, even at its lowest compressor speed, there is still an issue of excessive cooling capacity.

[0029] Combination Figures 1 to 4 As shown, according to a specific embodiment of this application, a vehicle-mounted refrigerator system is provided.

[0030] Specifically, the vehicle-mounted refrigerator system includes: a first refrigerant line, on which an electric compressor 1 and a water-cooled condenser 3 are installed; a second refrigerant line, on which a vehicle-mounted refrigerator 6 is installed, and the second refrigerant line is connected to the first refrigerant line; a third refrigerant line, on which an evaporator is installed, and the third refrigerant line is connected to the first refrigerant line and is connected in parallel with the second refrigerant line; wherein, at least one pressure regulating pump 8 is also installed on the second refrigerant line, and the pressure regulating pump 8 is used to regulate the pressure of the second refrigerant line.

[0031] By applying the specific solution of this embodiment, a first refrigerant pipeline, a second refrigerant pipeline, and a third refrigerant pipeline are designed, and at least one pressure regulating pump 8 is integrated into the second refrigerant pipeline. This allows the pressure of the second refrigerant pipeline to be adjusted in real time according to demand. The system can accurately control the flow and pressure of the refrigerant according to the actual cooling needs of the refrigerator, ensuring the coordination between the air conditioning system and the vehicle refrigerator 6 when they work simultaneously. This solves the problem of pressure mismatch between the refrigerator circuit and the air conditioning circuit in the prior art, ensuring the high efficiency and reliability of the vehicle refrigeration system and ensuring the efficient operation of the entire system under different operating conditions.

[0032] Furthermore, by installing a pressure regulating pump 8 on the second refrigerant pipeline, the system can also accurately control the flow and pressure of the refrigerant according to the actual cooling needs of the refrigerator, thus solving the problem of excessive cooling capacity of the vehicle refrigerator 6.

[0033] Specifically, there are two third refrigerant lines, which are connected in parallel. One of the third refrigerant lines is connected to the first refrigerant line to form the front air conditioning circuit, and the other third refrigerant line is connected to the first refrigerant line to form the rear air conditioning circuit.

[0034] In this embodiment, the third refrigerant pipeline is designed to be two parallel lines, forming a front air conditioning circuit and a rear air conditioning circuit with the first refrigerant pipeline respectively. Each air conditioning circuit can operate independently, allowing the system to flexibly allocate cooling capacity according to actual needs.

[0035] The vehicle refrigerator system also includes a fourth refrigerant line, on which a cooler 18 is installed. The fourth refrigerant line is connected to the first refrigerant line and is connected in parallel with the second and third refrigerant lines.

[0036] In this embodiment, by providing a cooler 18, the system is able to provide cooling for other components of the vehicle, and the parallel design enables the system to respond to changing thermal management needs in a short time.

[0037] Furthermore, at least one of battery 21 and electric drive 22 is provided on the coolant pipeline, and the coolant pipeline is connected to the cooler 18. The first coolant pipeline is used for heat exchange between battery 21 and electric drive 22.

[0038] In this embodiment, the coolant piping design, which directly connects the cooler 18 to the battery 21 and the electric drive 22, enables rapid response to temperature changes in the battery and the electric drive, thereby improving the vehicle's thermal management efficiency.

[0039] Specifically, the vehicle refrigerator system also includes a second cooling pipe and a heat dissipation assembly. A heater core 24 is installed on the second coolant pipe, and the second coolant pipe is connected to the water-cooled condenser 3. The heat dissipation assembly includes a radiator 25 and a cooling fan 26. The radiator 25 is installed on the second coolant pipe, and the cooling fan 26 is installed close to the radiator 25.

[0040] In this embodiment, by integrating the heater core 24 into the coolant pipeline, the vehicle can use the temperature of the coolant to heat the interior, providing warmth to passengers more effectively. The system's heat dissipation capacity is enhanced by the arrangement of the radiator 25 and the cooling fan 26, and the cooling fan 26 can accelerate air circulation and improve heat dissipation efficiency.

[0041] Preferably, a PT sensor is provided at both the inlet end and the outlet end of the pressure regulating pump 8.

[0042] In this embodiment, by setting PT sensors at the inlet and outlet of the pressure regulating pump 8, the refrigerant pressure on both sides of the pressure regulating pump can be monitored in real time, enabling the system to respond to pressure changes instantly and ensuring the stability and efficiency of the pressure regulating pump 8.

[0043] Among them, the PT (Pressure Transmitter) sensor is used to monitor the internal pressure of the pipeline.

[0044] According to another embodiment of this application, a control method for a vehicle-mounted refrigerator system is provided. This method is used to control the aforementioned vehicle-mounted refrigerator system, such as... Figure 5 As shown, the method includes the following steps:

[0045] Step S500: Obtain the target operating mode of the vehicle refrigerator system;

[0046] Step S510: When the target working mode is determined to be the simultaneous cooling mode of the air conditioner and the refrigerator, a first working strategy is generated. The first working strategy includes at least connecting the first refrigerant pipeline with the second refrigerant pipeline and the third refrigerant pipeline, and turning on the electric compressor 1, the water-cooled condenser 3, the evaporator, and the vehicle refrigerator 6.

[0047] Step S520: If the target working mode is determined to be the refrigerator stand-alone cooling mode, a second working strategy is generated. The second working strategy includes at least connecting the first refrigerant line and the second refrigerant line, and turning on the electric compressor 1, the water-cooled condenser 3, and the vehicle refrigerator 6.

[0048] Step S530: If the target working mode is determined to be the air conditioner stand-alone cooling mode, a third working strategy is generated. The third working strategy includes at least connecting the first refrigerant line to the third refrigerant line and turning on the electric compressor 1, the water-cooled condenser 3, and the evaporator.

[0049] Step S540: Execute any one of the first working strategy, the second working strategy, or the third working strategy to put the vehicle refrigerator system into the target working mode.

[0050] Applying the technical solution of this embodiment, when the air conditioner and refrigerator are in simultaneous cooling mode, the system connects the first refrigeration pipeline with the second and third refrigerant pipelines through the first working strategy, using the electric compressor and water-cooled condenser together, which can make full use of the existing cooling capacity. When the refrigerator is in cooling mode alone, the vehicle air conditioning system does not need to be run, reducing unnecessary energy consumption. When the air conditioner is in cooling mode alone, the air conditioning system does not need to be started, significantly reducing the vehicle's energy consumption. By providing a control method for the vehicle refrigerator system, corresponding working strategies can be generated and executed according to different target working modes. This control method can intelligently select the optimal working mode according to different scenarios and needs, and can independently control the cooling of the air conditioner and refrigerator. Each working strategy is to achieve a specific temperature control target, which can more precisely control the temperature inside the vehicle and inside the refrigerator.

[0051] Specifically, the method also includes:

[0052] Step S610: When it is determined that the vehicle refrigerator system is in the simultaneous air conditioning and refrigerator cooling mode, the refrigerant pressure of the second refrigerant line and the refrigerant pressure of the third refrigerant line are obtained.

[0053] Step S620: If the refrigerant pressure difference between the refrigerant pressure of the second refrigerant line and the refrigerant pressure of the third refrigerant line meets the preset adjustment conditions, a fourth working strategy is generated based on the refrigerant pressure difference. The fourth working strategy includes at least adjusting the working state of the pressure regulating pump 8.

[0054] In step S620, the preset adjustment condition is usually that the refrigerant pressure difference exceeds the preset pressure difference range. The preset pressure difference range is the pressure difference range when the air conditioner and refrigerator are working normally in the simultaneous cooling mode, and is determined according to the specific models of the air conditioner and refrigerator.

[0055] Step S630: Execute the fourth operating strategy to keep the refrigerant pressure differential within the preset pressure differential range.

[0056] Through steps S610-S630, by real-time monitoring and adjustment of the pressure regulating pump 8, the pressure difference between the second and third refrigerant lines is kept within a reasonable range, avoiding a decrease in refrigeration efficiency due to pressure imbalance. The automatic execution of the fourth working strategy can adjust the speed or working mode of the pressure regulating pump 8 according to the real-time pressure difference, ensuring that both the air conditioner and the refrigerator can achieve optimal working efficiency.

[0057] Specifically, the method also includes:

[0058] Step S710: When it is determined that the vehicle refrigerator 6 system is in refrigerator stand-alone cooling mode, the rotation speed of the electric compressor 1 and the cooling capacity of the vehicle refrigerator 6 are obtained.

[0059] Step S720: When it is determined that the electric compressor 1 is within the preset speed range and the cooling capacity of the vehicle refrigerator 6 is within the preset excess range, a fifth working strategy is generated. The fifth working strategy includes at least turning off the electric compressor 1, connecting the second refrigerant line and the third refrigerant line, and adjusting the working state of the pressure regulating pump 8.

[0060] In step S720, the preset speed range can be the low speed range of the electric compressor 1 during normal operation. When the electric compressor 1 is in the preset speed range, it can be determined that the speed of the electric compressor 1 is already at a low level, and the cooling capacity cannot be effectively reduced by lowering the speed of the electric compressor 1.

[0061] Step S730: Execute the fifth operating strategy to form a refrigerator refrigeration circuit with the second refrigerant line and the third refrigerant line.

[0062] Through steps S710-S730, the rotational speed of the electric compressor 1 and the cooling capacity of the vehicle refrigerator 6 are obtained. When the electric compressor 1 is detected to be within a preset rotational speed range and the refrigerator cooling capacity is within a preset excessive range, a fifth working strategy is generated and executed. When the refrigerator cooling capacity is excessive but the compressor speed is still at a high level, the electric compressor 1 can be turned off and the refrigeration cycle can be maintained by the pressure regulating pump 8, which significantly reduces energy consumption. At the same time, the working state of the pressure regulating pump 8 can be finely adjusted according to the actual needs of the refrigerator, ensuring that the refrigerator maintains a stable cooling effect in the standalone cooling mode, avoiding temperature fluctuations caused by over-cooling or under-cooling. The automatic generation and execution of the fifth working strategy allows the system to quickly adjust the instruction strategy, improving the system's intelligence level.

[0063] It should be understood that after implementing the fifth working strategy, when the refrigerator's cooling capacity is detected to have dropped to an excessively low range, the electric compressor 1 can be restarted and the pressure regulating pump 8 adjusted to maintain the refrigerator's cooling capacity within the target range.

[0064] According to another embodiment of this application, a vehicle is provided, including an on-board refrigerator system, which is the on-board refrigerator system described above.

[0065] Through intelligent control strategies, the operating conditions of the pressure regulating pump 8 and the dynamic connection of the refrigerant pipeline can significantly improve energy efficiency and reduce consumption. The system provides stable and efficient cooling effects according to different operating modes, ensuring comfortable temperatures inside the vehicle and refrigerator, and enhancing the user's driving experience.

[0066] This application also provides a preferred embodiment of an adjustable pressure vehicle refrigerator system architecture.

[0067] The adjustable pressure vehicle refrigerator system architecture mainly includes two system loops:

[0068] 1) The vehicle refrigerator circuit includes: electric compressor 1 (shared with the vehicle air conditioning system circuit), water-cooled condenser 3 (shared with the vehicle air conditioning system circuit), refrigerator inlet electronic expansion valve 5, vehicle refrigerator 6 (including evaporator), and pressure regulating pump 8.

[0069] 2) The vehicle air conditioning circuit includes: electric compressor 1, water-cooled condenser 3, refrigerator inlet electronic expansion valve 5, and air conditioning unit (including evaporator).

[0070] The two circuits are coupled together via a shared compressor and condenser, with the pressure regulating pump 8 added to the vehicle refrigerator circuit being the core invention. Adding the pressure regulating pump 8 to the vehicle refrigerator circuit enables real-time adjustment of the circuit pressure. When the refrigerator and the vehicle's air conditioning system operate simultaneously, the refrigerant pressure in the refrigerator circuit may be too low. To match the pressure in the vehicle's air conditioning circuit, the pressure regulating pump 8 can be activated to increase the circuit pressure, achieving pressure matching and adjustment between the two circuits. When the refrigerator operates alone, if the cooling capacity of the vehicle's compressor is excessive, the pressure regulating pump 8 can be activated independently, shutting down the vehicle's compressor and resolving the issue of excessive cooling capacity.

[0071] When the vehicle's air conditioning is turned on solely for cooling purposes, the refrigerant flows through the following path: Electric compressor 1 - Compressor outlet PT sensor 2 - Water-cooled condenser 3 - Receiver tank 4 - Front air conditioning unit evaporator inlet electronic expansion valve 10 - Front air conditioning unit evaporator 11 - Front air conditioning unit evaporator outlet PT sensor 12 - Compressor inlet PT sensor 13 - Electric compressor 1. This is the traditional air conditioning cooling circuit. When the refrigerator also requires cooling while the vehicle's air conditioning is on, the refrigerant will enter an additional refrigerator cooling circuit: Electric compressor 1 - Compressor outlet PT sensor 2 - Water-cooled condenser 3 - Receiver tank 4 - Refrigerator inlet electronic expansion valve 5 - Onboard refrigerator 6 - Refrigerator outlet PT sensor 7 - Pressure regulating pump 8 - Pressure regulating pump outlet PT sensor 9 - Compressor inlet PT sensor 13 - Electric compressor 1. In this case, the vehicle's compressor drives the refrigerant circulation to simultaneously cool the passenger compartment and the refrigerator. Because refrigerators require both refrigeration and freezing, their cooling temperature is typically lower than that of the passenger compartment. This results in a lower refrigerant pressure in the refrigerator circuit compared to the air conditioning circuit. A pressure mismatch occurs when the refrigerants from both circuits meet before the compressor inlet PT sensor 13. This problem is solved by adding a pressure regulating pump 8, which increases the pressure in the refrigerator circuit. The pressure regulating pump outlet PT sensor 9 monitors the pump's outlet pressure in real-time, ensuring it matches the air conditioning circuit pressure. When only the refrigerator requires cooling, the refrigerator cooling circuit is activated independently: electric compressor 1 - compressor outlet PT sensor 2 - water-cooled condenser 3 - liquid receiver 4 - refrigerator inlet electronic expansion valve 5 - vehicle refrigerator 6 - refrigerator outlet PT sensor 7 - pressure regulating pump 8 - pressure regulating pump outlet PT sensor 9 - compressor inlet PT sensor 13 - electric compressor 1. The vehicle compressor then drives the refrigerant to cool the refrigerator. When the compressor runs at its lowest speed and the cooling capacity is still excessive, the circuit can be switched to pressure regulating pump 8 - pressure regulating pump outlet PT sensor 9 - front air conditioning unit evaporator outlet PT sensor 12 - front air conditioning unit evaporator 11 - front air conditioning unit evaporator inlet electronic expansion valve 10 - refrigerator inlet electronic expansion valve 5 - vehicle refrigerator 6 - refrigerator outlet PT sensor 7 - pressure regulating pump 8, and the electric compressor 1 can be turned off. The refrigerant circulation driven by pressure regulating pump 8 can provide a small load of cooling capacity. At this time, the front air conditioning unit evaporator 11 is used as a condenser.

[0072] In another embodiment of this application, Figure 2 It shows the basis Figure 1 An expanded vehicle refrigerator system architecture adds a rear air conditioning unit circuit. This circuit includes an electronic expansion valve 14 at the rear air conditioning unit evaporator inlet, a rear air conditioning unit evaporator 15, and a PT sensor 16 at the rear air conditioning unit evaporator outlet. The application is basically the same. Figure 1When the refrigerator cooling circuit and the air conditioner cooling circuit are turned on at the same time, the pressure regulating pump 8 is used to adjust and match the refrigerator side pressure. When the refrigerator circuit is turned on alone, if there is a problem of excessive cooling capacity, it can be solved by connecting the refrigerator circuit with other air conditioner circuits and starting the pressure regulating pump 8.

[0073] Figure 3 It shows the basis Figure 2 An expanded vehicle refrigerator system architecture is proposed, which adds a Chiller circuit, i.e., a cooler circuit. The cooler circuit includes a cooler inlet electronic expansion valve 17, a cooler 18, and a cooler outlet PT sensor 19.

[0074] Figure 4 It shows the basis Figure 3 An expanded vehicle-mounted refrigerator system architecture is proposed, adding a water-side loop. The battery water pump 20, battery 21, and electric drive 22 are coupled to the coolant side via a cooler 18. The heater pump 23, heater core 24, radiator 25, and cooling fan 26 are coupled to the refrigerant side via a water-cooled condenser 3. Currently, only the most basic water-side loop system is shown. The chiller side is connected to the battery 21 and electric drive 22, and the water-cooled condenser side is connected to the heater core 24 and radiator 25. More connection modes can be achieved between the water-side systems through a multi-way valve design.

[0075] Specifically, the pressure regulating pump 8 can be electronic, or it can be mechanical or hydraulic. It just needs to be able to regulate and control the refrigerant pressure. The pressure regulating pump 8 can be piston type or scroll type. There can also be multiple pressure regulating pumps 8. Based on the arrangement position and method, multiple small pressure regulating pumps 8 can be distributed to achieve the effect of a single pump. It is not limited to pump type. Any pressure regulating device that can regulate the refrigerant pressure can achieve similar technical effects.

[0076] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0077] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0078] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0079] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0080] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0081] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0082] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0083] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A vehicle-mounted refrigerator system, characterized in that, include: The first refrigerant pipeline is equipped with an electric compressor (1) and a water-cooled condenser (3). A second refrigerant line is provided, on which a vehicle refrigerator (6) is installed, and the second refrigerant line is connected to the first refrigerant line; A third refrigerant line is provided with an evaporator. The third refrigerant line is connected to the first refrigerant line and is connected in parallel with the second refrigerant line. The second refrigerant pipeline is also equipped with at least one pressure regulating pump (8), which is used to regulate the pressure of the second refrigerant pipeline.

2. The vehicle-mounted refrigerator system according to claim 1, characterized in that, There are two third refrigerant lines, which are connected in parallel. One of the third refrigerant lines is connected to the first refrigerant line to form a first air conditioning circuit, and the other third refrigerant line is connected to the first refrigerant line to form a second air conditioning circuit.

3. The vehicle-mounted refrigerator system according to claim 1, characterized in that, Also includes: A fourth refrigerant line is provided with a cooler (18). The fourth refrigerant line is connected to the first refrigerant line and is connected in parallel with the second refrigerant line and the third refrigerant line.

4. The vehicle-mounted refrigerator system according to claim 3, characterized in that, Also includes: A first coolant pipeline is provided with at least one of a battery (21) and an electric drive (22). The coolant pipeline is connected to the cooler (18). The first coolant pipeline is used to perform heat exchange operations between the battery (21) and the electric drive (22).

5. The vehicle-mounted refrigerator system according to claim 1, characterized in that, Also includes: The second coolant pipeline is provided with a heater core (24), and the second coolant pipeline is connected to the water-cooled condenser (3); The heat dissipation assembly includes a radiator (25) and a cooling fan (26), wherein the radiator (25) is disposed on the second coolant pipeline and the cooling fan (26) is disposed close to the radiator (25).

6. The vehicle-mounted refrigerator system according to any one of claims 1-5, characterized in that, Both the inlet and outlet ends of the pressure regulating pump (8) are equipped with PT sensors.

7. A control method for a vehicle-mounted refrigerator system, characterized in that, The method is used to control the vehicle-mounted refrigerator system according to any one of claims 1-6, and the method includes the following steps: Obtain the target operating mode of the vehicle refrigerator system; When the target working mode is determined to be the simultaneous cooling mode of the air conditioner and the refrigerator, a first working strategy is generated. The first working strategy includes at least connecting the first refrigerant pipeline with the second refrigerant pipeline and the third refrigerant pipeline, and turning on the electric compressor (1), the water-cooled condenser (3), the evaporator, and the vehicle refrigerator (6). When the target working mode is determined to be the refrigerator stand-alone cooling mode, a second working strategy is generated. The second working strategy includes at least connecting the first refrigerant pipeline to the second refrigerant pipeline and turning on the electric compressor (1), the water-cooled condenser (3), and the vehicle refrigerator (6). When the target working mode is determined to be the air conditioner stand-alone cooling mode, a third working strategy is generated. The third working strategy includes at least connecting the first refrigerant pipeline to the third refrigerant pipeline and turning on the electric compressor (1), the water-cooled condenser (3), and the evaporator. Execute any one of the first working strategy, the second working strategy, and the third working strategy to put the vehicle refrigerator system into the target working mode.

8. The method according to claim 7, characterized in that, The method further includes: When it is determined that the vehicle refrigerator system is in the simultaneous air conditioning and refrigerator cooling mode, the refrigerant pressure of the second refrigerant pipeline and the refrigerant pressure of the third refrigerant pipeline are obtained; When the refrigerant pressure difference between the refrigerant pressure of the second refrigerant pipeline and the refrigerant pressure of the third refrigerant pipeline meets the preset adjustment conditions, a fourth working strategy is generated based on the refrigerant pressure difference. The fourth working strategy includes at least adjusting the working state of the pressure regulating pump (8). The fourth operating strategy is executed to keep the refrigerant pressure difference within a preset pressure difference range.

9. The method according to claim 7, characterized in that, The method further includes: When it is determined that the vehicle refrigerator system is in refrigerator stand-alone cooling mode, the rotation speed of the electric compressor (1) and the cooling capacity of the vehicle refrigerator (6) are obtained; When it is determined that the electric compressor (1) is in a preset speed range and the cooling capacity of the vehicle refrigerator (6) is in a preset excess range, a fifth working strategy is generated. The fifth working strategy includes at least turning off the electric compressor (1), connecting the second refrigerant pipeline and the third refrigerant pipeline, and adjusting the working state of the pressure regulating pump (8). The fifth operating strategy is executed to form a refrigerator refrigeration circuit with the second refrigerant line and the third refrigerant line.

10. A vehicle, characterized in that, Includes a vehicle-mounted refrigerator system, wherein the vehicle-mounted refrigerator system is the vehicle-mounted refrigerator system according to any one of claims 1-6.

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