Integrated heat pump liquid storage drying valve terminal system

Abstract

The invention relates to the field of new energy heat management systems, in particular to an integrated heat pump liquid storage drying valve terminal system which comprises an integrated valve terminal system, and a compressor, an air conditioner heating system, an external heat exchanger, an air conditioner evaporator and a battery cooling evaporator which are respectively connected with the integrated valve terminal system. And high-pressure damageable parts of the heat pump system are independently integrated, so that the maintenance and replacement cost is reduced while the system is convenient to assemble. The framework of the refrigerant high-pressure part of the heat pump system is designed to be used for specific part integration, and the installation efficiency is improved. A high-pressure side integrated framework compatible with a direct type heat pump system and an indirect type heat pump system is designed, and the high-pressure side and the high-temperature side are independently arranged to eliminate the thermal interference influence of large integration on low pressure and low temperature of refrigerants. High-voltage vulnerable parts of the system are integrated, and each part can be conveniently disassembled, so that the maintenance and replacement cost of the total system is reduced. The technical problems that a heat management system in the prior art is difficult to maintain after breaking down and high in maintenance cost can be solved.

Description

Technical Field

[0001] The present invention relates to the field of new energy thermal management systems, and in particular to an integrated heat pump liquid storage and drying valve island system. Background Art

[0002] The thermal management system in new energy vehicles includes thermal management control of the driver's cabin, vehicle electronic control, vehicle electric drive, and vehicle battery. In the heat pump system of new energy, various valves and system components are usually installed independently, resulting in high installation complexity, inconvenient maintenance and large space occupation. Especially in the heat pump system, many thermal management components are required. The integrated development of vehicle thermal management is the development trend of the vehicle thermal management industry. Integrated development can effectively reduce connecting pipes and connecting brackets, greatly reducing the complexity and cost of system connections. Therefore, there is a need for a heat pump integrated valve island system that can integrate multiple functions together to improve the reliability and efficiency of the system, while simplifying the installation and maintenance process.

[0003] However, when the valve island with a high degree of system integration is faulty, it is difficult to repair it. Damage to a single part may result in the replacement of the entire system, as follows:

[0004] 1) Heat pump automotive thermal management systems are complex to install;

[0005] 2) Internal thermal interference of the integrated thermal management module leads to low efficiency of the automotive thermal management system;

[0006] 3) Complex automotive thermal management systems are difficult to maintain;

[0007] 4) Highly integrated thermal management components have high maintenance costs.

[0008] In the integrated thermal management components of automobiles, since the integration of high and low pressure of the system will cause the high and low temperature heat of the system to cause additional losses to the heat exchange of the system, it is recommended to integrate the high and low pressure of the system separately to eliminate the influence of heat load on internal heat exchange. In the prior art, the integrated components of the automotive thermal management system are mainly on the low-pressure side, but the reliability leakage and functional failure risks of the automotive thermal management system are mainly concentrated on the high-pressure side. Damage to the components on the high-pressure side can easily lead to the replacement of multiple components, or even the entire integrated module on the low-pressure side, which has a high maintenance cost. Therefore, the thermal management system of the prior art has the disadvantages of being difficult to repair after a failure and having a high maintenance cost. Summary of the invention

[0009] The purpose of the present invention is to provide an integrated heat pump liquid storage and drying valve island system, which can solve the technical problems of the thermal management system in the prior art that it is difficult to repair after a failure and has high maintenance costs.

[0010] To achieve the above-mentioned purpose, the present invention designs an integrated heat pump liquid storage and drying valve island system, including an integrated valve island system, a compressor, an air conditioning heating system, an external heat exchanger, an air conditioning evaporator, and a battery cooling evaporator respectively connected to the integrated valve island system, the air conditioning evaporator is connected to the integrated valve island system through a first electronic expansion valve, and the battery cooling evaporator is connected to the integrated valve island system through a second electronic expansion valve; the other ends of the air conditioning evaporator and the battery cooling evaporator are respectively connected to the inlet end of the compressor; the integrated valve island system is used to realize the cooling and heating mode switching of the integrated heat pump liquid storage and drying valve island system.

[0011] As a preferred solution, the integrated valve island system includes a liquid storage dry tank located on the high-pressure side of the heat pump system, a valve island body, a refrigerant three-way valve, a refrigerant electronic expansion valve, and a refrigerant check valve. Refrigerant circulation holes are provided on the liquid storage dry tank and the valve island body, and the refrigerant three-way valve, refrigerant electronic expansion valve, and refrigerant check valve are respectively connected to the interfaces on the valve island body.

[0012] Furthermore, the interfaces on the valve island body include a one-way valve interface, an external heat exchanger interface, a compressor interface, and an evaporator interface. The one-way valve interface is respectively connected to the refrigerant electronic expansion valve and the external heat exchanger, the external heat exchanger interface is respectively connected to the refrigerant three-way valve and the external heat exchanger, the compressor interface is connected to the refrigerant three-way valve, and the evaporator interface is respectively connected to the air-conditioning evaporator and the battery cooling evaporator.

[0013] As a preferred solution, when the integrated heat pump liquid storage and drying valve island system enters the passenger compartment air source heat pump heating, the refrigerant after the compressed refrigerant heat exchange enters the refrigerant three-way valve from the compressor interface. The valve is open to the left and right but not to the lower right. The refrigerant flows through the liquid storage and drying tank, expands through the refrigerant electronic expansion valve, and then enters the external heat exchanger through the one-way valve interface. At this time, the refrigerant absorbs the waste heat of the air to heat the passenger compartment to realize the air source heat pump heating function.

[0014] As a preferred solution, when the integrated heat pump liquid storage and drying valve island system enters the passenger compartment water source heat pump for heating, the refrigerant after the compressed refrigerant heat exchange enters the refrigerant three-way valve from the compressor interface. The valve is open to the left and right but not to the lower right. The refrigerant flows out of the evaporator interface through the liquid storage and drying tank. At this time, the refrigerant electronic expansion valve is closed, and the outflowing refrigerant expands through the second electronic expansion valve and passes through the battery cooling evaporator to absorb the heat of the battery or electric drive coolant water source and returns to the compressor to realize the passenger compartment water source heat pump heating function.

[0015] As a preferred solution, when the integrated heat pump liquid storage and drying valve island system enters the passenger compartment cooling mode, the compressed refrigerant enters the refrigerant three-way valve from the compressor interface. The valve is blocked on the left and right but open on the lower right. The refrigerant flows out through the external heat exchanger interface to the external heat exchanger for external heat exchange condensation. The liquid refrigerant returns to the liquid storage and drying integrated valve island system through the one-way valve interface and is then stored in the liquid storage and drying tank. At this time, the refrigerant electronic expansion valve is closed, and the liquid refrigerant flows out from the evaporator interface to the outside, expands through the first electronic expansion valve, and flows into the air conditioning evaporator to absorb the heat of the passenger compartment air, thereby achieving passenger compartment cooling.

[0016] As a preferred solution, the air conditioning heating system is an air conditioning heater used in a direct heat pump system, and the air conditioning heater is respectively connected to the compressor outlet and the integrated valve island system.

[0017] As a preferred embodiment, the air conditioning heating system is a water-cooled condenser and an air conditioning warm air heat exchanger, which is used in an indirect heat pump system. The water-cooled condenser is respectively connected to the compressor outlet and the integrated valve island system, and the air conditioning warm air heat exchanger is connected to the water-cooled condenser.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides an integrated heat pump liquid storage drying valve island system, which integrates high-pressure vulnerable parts of a heat pump system separately, thereby facilitating assembly of the system and reducing maintenance and replacement costs.

[0020] 1) Design a heat pump system refrigerant high pressure part architecture for specific component integration to improve installation efficiency.

[0021] 2) Design a high-pressure side integrated architecture that is compatible with direct and indirect heat pump systems, and arrange the high-pressure and high-temperature sides independently to eliminate the thermal interference of large integration on the low-pressure and low-temperature of the refrigerant.

[0022] 3) Design the three-dimensional structure of the physical valve island of the integrated system to maximize space utilization.

[0023] 4) The system's high-voltage vulnerable parts are integrated, and each part can be easily disassembled, reducing the maintenance and replacement costs of the overall system.

[0024] The present invention can solve the technical problems of the prior art that the thermal management system is difficult to repair after a failure and has high maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the direct heat pump system of the present invention.

[0026] Figure 2 This is a schematic diagram of the indirect heat pump system of the present invention.

[0027] Figure 3 This is a diagram of the integrated valve island system of the present invention.

[0028] Figure 4 This is an integrated valve island assembly diagram of the present invention.

[0029] Figure 5 It is a three-dimensional view of one side of the valve island body of the present invention.

[0030] Figure 6 It is a three-dimensional view of the other side of the valve island body of the present invention.

[0031] Description of reference numerals:

[0032] Compressor 1.1, air conditioning heater 1.2, integrated valve island system 1.3, external heat exchanger 1.4, two-way valve 1.5, first electronic expansion valve 1.6, air conditioning evaporator 1.7, second electronic expansion valve 1.8, battery cooling evaporator 1.9, water-cooled condenser 2.1, air conditioning heater heat exchanger 2.2; integrated valve island system 1.3: refrigerant three-way valve 3.1, liquid storage drying tank 3.2, refrigerant electronic expansion valve 3.3, refrigerant one-way valve 3.4, valve island body 3.5;

[0033] One-way valve interface a, external heat exchanger interface b, compressor interface c, evaporator interface d, refrigerant electronic expansion valve interface e, refrigerant three-way valve interface f, liquid storage dry tank inlet g, liquid storage dry tank outlet h. DETAILED DESCRIPTION

[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Based on the reliability leakage and functional failure risks of the automotive thermal management system mainly on the high-pressure side, once the high-pressure of the highly integrated integrated module is damaged, all integrated modules will be replaced, and the maintenance cost will be high. The present invention provides a set of architectures compatible with the heat pump system, and at the same time, based on the architecture, provides an integrated layout of the valve island solution on the high-pressure side of the system to improve the system integration and reduce the installation and maintenance difficulty and cost of the system. The present invention spatially integrates the high-pressure side thermal management components of the system to facilitate vehicle installation and maintenance.

[0037] The present invention relates to the battery, electric drive, passenger compartment thermal management system and system integrated valve island components of new energy vehicles, and in particular to an integrated heat pump liquid storage and drying valve island system, including switching between air source heat pump mode, water source heat pump mode and cooling mode, and is compatible with both direct and indirect heat pump systems.

[0038] In view of the problems in the background technology, the present invention integrates high-pressure vulnerable components of a heat pump system separately, thereby facilitating assembly of the system and reducing maintenance and replacement costs.

[0039] To solve the above problems, the present invention focuses on:

[0040] 1) Design a heat pump system refrigerant high pressure part architecture for specific component integration to improve installation efficiency.

[0041] 2) Design a high-pressure side integrated architecture that is compatible with direct and indirect heat pump systems, and arrange the high-pressure and high-temperature sides independently to eliminate the thermal interference of large integration on the low-pressure and low-temperature of the refrigerant.

[0042] 3) Design the three-dimensional structure of the physical valve island of the integrated system to maximize space utilization.

[0043] 4) The system's high-voltage vulnerable parts are integrated, and each part can be easily disassembled, reducing the maintenance and replacement costs of the overall system.

[0044] The invention's integrated heat pump liquid storage and drying valve island system designs a heat pump system architecture that physically integrates the refrigerant valve on the high-pressure side of the heat pump system with the liquid storage and drying tank. The integrated components are mainly on the high-pressure side of the refrigerant in the system, controlling the refrigerant flow in both heat pump heating and air conditioning cooling modes. The related components are integrated and connected to reduce the number of pipelines, brackets, etc., thereby reducing costs.

[0045] The invention includes a set of integrated heat pump liquid storage and drying architecture and corresponding component valve island products. The integrated heat pump liquid storage and drying valve island includes: liquid storage and drying tank, filter, desiccant, sealing ring, refrigerant three-way valve, refrigerant one-way valve, refrigerant electronic expansion valve, integrated valve island, bolts; the integrated valve island body is used as a supporting connection part, the refrigerant three-way valve and the refrigerant electronic expansion valve are fixed to the valve island body by bolts, the liquid storage and drying tank is welded to the integrated valve island, and the refrigerant one-way valve is pressed inside the middle integrated valve island. The integrated valve island system can switch the heat entering the air source or coolant source of the whole vehicle to recover the heat to the driver's cabin for heating in winter according to different vehicle working conditions. It can also switch the system cooling mode to transfer the heat of the passenger cabin to the air side when the passenger cabin needs to be cooled in summer, so as to realize the switching of cooling and heating modes. In addition, the invention physically integrates the high-pressure side of the system to improve the local integration of the system and facilitate the installation and maintenance of the whole vehicle. The system architecture model is clearly described, the principle of switching the functional mode of the overall architecture loop is correct, and the physical structure integration is clearly described. Therefore, the invention has a high degree of feasibility and maturity and can be mass-produced in new energy vehicles.

[0046] The present invention provides an integrated heat pump liquid storage and drying valve island system, comprising an integrated valve island system, a compressor, an air conditioning heating system, an external heat exchanger, an air conditioning evaporator, and a battery cooling evaporator respectively connected to the integrated valve island system, the air conditioning evaporator is connected to the integrated valve island system through a first electronic expansion valve, and the battery cooling evaporator is connected to the integrated valve island system through a second electronic expansion valve; the other ends of the air conditioning evaporator and the battery cooling evaporator are respectively connected to the inlet end of the compressor; the integrated valve island system is used to realize the mode switching of cooling and heating of the integrated heat pump liquid storage and drying valve island system.

[0047] 1. Architecture of heat pump system:

[0048] At present, the thermal management system of new energy vehicles mainly relies on each component to work independently. The battery system heat pipe works as an independent system loop, and the passenger compartment thermal management system works as an independent system loop. The components of each system block work independently, and the heat of each link of the whole vehicle is not centrally distributed. Especially in the passenger compartment heating mode, the heat pump system is not used for low-power heating, which makes the whole vehicle lose a lot of electric energy in thermal management control and reduces the battery's cruising range. Therefore, in order to solve this problem, the present invention proposes a multi-mode functional heat pump system architecture that integrates the passenger compartment, battery pack, and electronic control system, including passenger compartment cooling and heating, battery cooling and heating and other modes to meet the thermal management mode requirements of various driving conditions of the whole vehicle. The cruising range of the whole vehicle is improved, especially in the case of the passenger compartment heating mode requirement in winter, the cruising range of the whole vehicle is increased.

[0049] The system architecture of the invention mainly includes a refrigerant circuit, which is divided into a direct heat pump system architecture and an indirect heat pump system architecture.

[0050] In the direct heat pump system architecture, combined with Figure 1 As shown, the refrigerant circuit includes an electric compressor 1.1 for compressing the refrigerant. After compression, the high-temperature and high-pressure refrigerant passes through the air-conditioning heater 1.2 for heat exchange. At this time, the high-temperature refrigerant exchanges heat with the low-temperature air through the air-conditioning heater and is passed into the passenger compartment to heat the passenger compartment. After the heat exchange, the refrigerant passes through the integrated heat pump liquid storage and drying valve island system 1.3 and enters the external heat exchanger 1.4 and the refrigerant two-way valve 1.5 according to different mode requirements to return to the compressor 1.1 for the next cycle; the refrigerant can also enter the air-conditioning evaporator 1.7 from the integrated heat pump liquid storage and drying valve island system 13 through the first electronic expansion valve 1.6 to realize the cab cooling function; it can also flow to the battery cooling evaporator 1.9 after expansion through the second electronic expansion valve 1.8 to realize the cooling of the battery coolant.

[0051] In the indirect heat pump system architecture, combined with Figure 2 As shown, the refrigerant circuit includes an electric compressor 1.1 for compressing the refrigerant. After compression, the high-temperature and high-pressure refrigerant passes through a water-cooled condenser 2.1 for heat exchange. At this time, the high-temperature refrigerant exchanges heat with the low-temperature coolant through the water-cooled condenser 2.1. The heated coolant exchanges heat with the air through the air-conditioning warm air heat exchanger 2.2 and is passed into the passenger compartment to heat the passenger compartment. After the heat exchange, the refrigerant passes through the integrated heat pump liquid storage and drying valve island system 1.3 and enters the external heat exchanger 1.4 and the refrigerant two-way valve 1.5 according to different mode requirements and returns to the compressor 1.1 for the next cycle; the refrigerant can also enter the air-conditioning evaporator 1.7 from the integrated heat pump liquid storage and drying valve island system 13 through the first electronic expansion valve 1.6 to realize the cab cooling function; it can also flow to the battery cooling evaporator 1.9 after expansion through the second electronic expansion valve 1.8 to realize the cooling of the battery coolant.

[0052] 2. Integrated heat pump liquid storage and drying valve island system:

[0053] In the proposed heat pump system architecture, the liquid storage drying tank and various refrigerant valves in the refrigerant distribution circuit on the high-pressure side of the heat pump system are further integrated to form an independent refrigerant storage and distribution system. The system stores high-temperature and high-pressure refrigerant and is isolated from the temperature of other circuits to eliminate thermal influence. At the same time, the integrated system can switch the system selection between passenger compartment cooling mode, passenger compartment heat pump heating mode, battery cooling mode, etc., and switch the corresponding mode according to different vehicle driving conditions to ensure that the system function meets the needs of the vehicle.

[0054] Combination Figure 3As shown, the integrated heat pump liquid storage and drying valve island system 1.3 of the present invention mainly includes four external connection ports a, b, c, and d. The refrigerant of the c port first enters the b port or flows to the liquid storage and drying tank 3.2 through the refrigerant three-way valve 3.1. At this time, the refrigerant cannot flow to the left due to the function of the one-way valve 3.4. After passing through the liquid storage and drying tank 3.2, it flows out of the b port according to the mode requirements, or flows out of the a port through the refrigerant electronic expansion valve. The above constitutes the integrated heat pump liquid storage and drying valve island system of the present invention.

[0055] 3. Structural design of integrated valve island:

[0056] In the proposed integrated heat pump liquid storage and drying valve island system, the liquid storage and drying tank, filter, desiccant, sealing ring, refrigerant three-way valve, refrigerant one-way valve, refrigerant electronic expansion valve, integrated valve island, bolts and other parts in the refrigerant distribution system are integrated and designed. In the core integrated valve island design, the present invention proposes a structure different from the current two-dimensional integrated flow channel plate, and uses a three-dimensional spatial integrated valve island to integrate various components, which greatly improves the space utilization of system integration, reduces the overall space occupation of the integrated valve island, and reduces the structure of the pipes and brackets connecting various thermal management components. The structure is easy to install, maintain and replace, has a compact structural design, and has high system operation efficiency.

[0057] Combined with Figure 3 Integrated heat pump liquid storage and drying valve island system, corresponding integrated components see Figure 4-6 . The structure has integrated the valve island as the core to connect various thermal management components. The core components of the system's high-pressure side, the liquid storage drying tank, the electronic expansion valve, the refrigerant three-way valve, and the refrigerant one-way valve are installed on the valve island. Different holes inside the valve island connect various thermal management components to form a system channel, switching the direction of the refrigerant in different thermal management modes to achieve automotive thermal management passenger compartment cooling and heating, and battery cooling and other modes. The valve island structure is a three-dimensional space structure. The connection holes a, b, c, and d of the four valve islands are connected to the outside respectively. There are two space holes inside the valve island to connect. This structure realizes the spatial integration of thermal management components and the mutual flow of refrigerant channels, realizing different mode switching.

[0058] Combine the following Figures 4 to 6 The technical solution of the present invention is further described.

[0059] The integrated heat pump liquid storage and drying valve island system of the present invention comprises three parts: a heat pump system architecture, a high-pressure side liquid storage and drying integrated valve island system and an integrated valve island assembly.

[0060] The first part is the heat pump system architecture. The system architecture of the present invention includes direct and indirect heat pump refrigerant systems. The switching of the circuits includes passenger compartment cooling and heating modes, battery cooling mode, etc.

[0061] Combination Figure 1 In the direct heat pump system shown, the refrigerant circuit includes an electric compressor 1.1 to compress the refrigerant. The compressed refrigerant passes through the air conditioning heater 1.2 to exchange heat with the low-temperature air in the passenger compartment. The low-temperature air in the passenger compartment is heated and blown to the passenger compartment through the blower to achieve the heating function. The refrigerant then passes through the integrated heat pump liquid storage and drying valve island system 1.3 through mode selection. When there is waste heat in the air, the refrigerant flows to the external heat exchanger 1.4 to absorb the waste heat of the environment and then returns to the compressor through the two-way valve 1.5 for the next cycle; when there is waste heat in the battery or electric drive system, the first electronic expansion valve 1.6 is closed, and the refrigerant flows through the second electronic expansion valve 1.8 to the battery cooling evaporator 1.9 to absorb the waste heat of the battery or electric drive, and then returns to the compressor for the next cycle. The above system realizes the mode of heat pump heating absorbing waste heat from the air source and the battery electric drive source.

[0062] When the passenger compartment needs to be cooled, the compressor 1.1 compresses the refrigerant and passes through the air conditioning heater 1.2 without heat exchange. The refrigerant flows to the integrated heat pump liquid storage dry valve island system 1.3 to switch routes. The heat of the refrigerant is first dissipated to the environment through the external heat exchanger, and the refrigerant is condensed into liquid and returned to the integrated heat pump liquid storage dry valve island system 1.3 for storage. The liquid refrigerant then expands through the first electronic expansion valve 1.6 and flows into the air conditioning evaporator 1.7 to absorb the heat of the passenger compartment air, realizing passenger compartment cooling. The refrigerant then returns to the compressor 1.1 for the next cycle. In summary, the direct heat pump system architecture realizes a variety of passenger compartment heat pump heating and cooling modes.

[0063] Combination Figure 2 In the indirect heat pump system shown, the refrigerant circuit includes an electric compressor 1.1 to compress the refrigerant. The compressed refrigerant passes through a water-cooled condenser 2.1 to exchange heat with the coolant of the air conditioning heater heat exchanger 2.2. The heated coolant exchanges heat with the passenger compartment air through the air conditioning heater heat exchanger 2.2. The low-temperature passenger compartment air is heated and blown to the passenger compartment through a blower to achieve the heating function. The refrigerant then passes through the integrated heat pump liquid storage dry valve island system 1.3 through mode selection. When there is residual heat in the air, the refrigerant flows to the external heat exchanger 1.4 to absorb the residual heat of the environment and then returns to the compressor through the two-way valve 1.5 for the next cycle; when there is residual heat in the battery or electric drive system, the first electronic expansion valve 1.6 is closed, and the refrigerant flows through the second electronic expansion valve 1.8 to the battery cooling evaporator 1.9 to absorb the residual heat of the battery or electric drive, and then returns to the compressor for the next cycle. The above system realizes the mode of heat pump heating absorbing residual heat from the air source and the battery electric drive source.

[0064] When the passenger compartment needs to be cooled, the compressor 1.1 compresses the refrigerant and passes through the water-cooled condenser 2.1 without heat exchange. The refrigerant flows to the integrated heat pump liquid storage dry valve island system 1.3 to switch routes. The heat of the refrigerant is first dissipated to the environment through the external heat exchanger, and the refrigerant is condensed into liquid and returned to the integrated heat pump liquid storage dry valve island system 1.3 for storage. The liquid refrigerant then expands through the first electronic expansion valve 1.6 and flows into the air conditioning evaporator 1.7 to absorb the heat of the passenger compartment air, realizing passenger compartment cooling. The refrigerant then returns to the compressor 1.1 for the next cycle. In summary, the indirect heat pump system architecture realizes a variety of passenger compartment heat pump heating and cooling modes.

[0065] The second part is a high-pressure side liquid storage and drying integrated valve island system. The high-pressure side liquid storage and drying integrated valve island system of the present invention integrates the high-pressure side thermal management components of the first invention content.

[0066] Combination Figure 3 As shown, it is Figure 1 The invention details of the medium and high pressure side liquid storage and drying integrated valve island system 1.3 are as follows: the four inlets and outlets a, b, c, and d of the high pressure side liquid storage and drying integrated valve island system 1.3 are connected to the Figure 3 The four exports in are defined identically.

[0067] When the system enters the passenger compartment air source heat pump heating, the refrigerant after the compressed refrigerant heat exchange is Figure 3 The c port in the middle enters the refrigerant three-way valve 3.1, which is open to the left and right but not to the lower right. The refrigerant flows through the liquid storage drying tank 3.2, flows through the refrigerant electronic expansion valve 3.3, and then expands through the a port to enter the external heat exchanger 1.4. At this time, the refrigerant absorbs the waste heat of the air to heat the passenger compartment to realize the air source heat pump heating function.

[0068] When the system enters the passenger compartment water source heat pump heating, the refrigerant after the compressed refrigerant heat exchange is Figure 3 The port C in the middle enters the refrigerant three-way valve 3.1, which is open to the left and right but not to the lower right. The refrigerant flows out of the port D through the liquid storage drying tank 3.2. At this time, the refrigerant electronic expansion valve 3.3 is closed, and the outflowing refrigerant expands through the second electronic expansion valve 1.8 and passes through the battery cooling evaporator 1.9 to absorb the heat of the battery or electric drive coolant water source and returns to the compressor to realize the water source heat pump heating function of the passenger compartment.

[0069] When the system enters the passenger compartment cooling mode, the compressed refrigerant Figure 3The c port in the middle enters the refrigerant three-way valve 3.1, which is blocked on the left and right sides but open on the lower right. The refrigerant flows out through the b port to the external heat exchanger 1.4 for external heat exchange and condensation. The liquid refrigerant returns to the liquid storage and drying integrated valve island system 1.3 through the a port and is stored in the liquid storage and drying tank 3.2. At this time, the refrigerant electronic expansion valve is closed, and the liquid refrigerant flows out from the d port to the outside, expands through the first electronic expansion valve 1.6, and flows into the air conditioning evaporator 1.7 to absorb the heat of the passenger compartment air, thereby realizing passenger compartment cooling.

[0070] In summary, the system realizes the heating function of the heat pump passenger cabin air source and water source, and can also realize the passenger cabin cooling function.

[0071] The integrated valve island assembly of the third part provides a detailed structural description of the high-pressure side heat pump liquid storage and drying integrated valve island system integration of the invention content of the second part.

[0072] Combination Figure 4 As shown, the integrated valve island assembly includes four external connection interfaces a, b, c, d. The 3.5 valve island body 3.5 is the core of the system and is connected to the liquid storage drying tank by brazing. Figure 6 The g and h interfaces are connected to the inlet and outlet of the liquid storage drying tank. The refrigerant flows out of the integrated valve island at the g outlet. The refrigerant is stored in the liquid storage drying tank and then flows into the valve island body 3.5 from the h inlet. The refrigerant three-way valve 3.1 is connected to the valve island body 3.5 by bolts and fixed to the f port of the valve island body 3.5. The refrigerant electronic expansion valve 3.3 is fixed to the e port of the valve island body 3.5 by bolts. The one-way valve 3.4 is press-fitted to the a port of the valve island body 3.5. The above thermal management system components are uniformly arranged in a connector with the integrated valve island as the core to realize related system functions.

[0073] In the air source heat pump passenger compartment heating mode, the refrigerant after compression and heat exchange is Figure 4 The middle port c flows into the integrated valve island assembly, and the refrigerant three-way valve controls the c-to-g port. At this time, the hole 5.1 of the integrated valve island realizes the connection of the space. The refrigerant flows from the g-port flow channel to the liquid storage drying tank and then returns to the valve island body 3.5 through the h port, and then flows into the refrigerant electronic expansion valve 3.3 of the e port of the valve island body 3.5 through the hole 5.3. After expansion, it flows out from the a port to the external heat exchanger to absorb the heat of the air, and returns to the compressor for the next cycle, thereby realizing the air source heat pump passenger compartment heating function.

[0074] In the battery or electric drive water source passenger cabin heat pump heating mode, the compressed heat exchanged refrigerant is Figure 4The middle port C flows into the integrated valve island assembly, and is controlled by the refrigerant three-way valve to realize the connection from port C to port G. At this time, the hole 5.1 of the integrated valve island realizes the connection of the space. The refrigerant flows from port G to the liquid storage drying tank and then returns to the valve island body 3.5 through port H. Port H is the same as port D. The liquid refrigerant flows out from port D to the second electronic expansion valve 1.8 and then passes through the battery cooling evaporator 1.9 to absorb the heat of the battery or electric drive coolant to realize the battery and electric drive water source passenger compartment heat pump heating function.

[0075] In the passenger compartment cooling mode, the refrigerant after compression by the compressor enters the valve island body 3.5 from port C, and the refrigerant three-way valve 3.1 switches port C to connect with port B. The compressed refrigerant enters the external heat exchanger 1.4 from port B to exchange heat with the environment to achieve refrigerant condensation, and then flows back to the integrated valve island assembly from port A, flows into the liquid storage drying tank from port G of the integrated valve island through the one-way valve 3.4, and then returns to the integrated valve island assembly from port H. Port H is connected with port D, and the liquid refrigerant flows out from port D, expands and evaporates through the first electronic expansion valve 1.6, and then absorbs the heat of the passenger compartment through the air-conditioning evaporator 1.7 to achieve the air-conditioning cooling function.

[0076] The corresponding thermal management mode is achieved through the design of the above structure and the control of the thermal management components. For the core integrated valve island assembly of the invention, there are a, b, c, d, e, f, g, h, a total of 8 connection ports, and three connection holes, hole 5.1; hole 5.2; hole 5.3. Among them, the six connection holes a, b, c, d, g, and h are external refrigerant inlet and outlet connection holes, and the hole diameter ranges are 6mm, 8mm, 10mm, 12mm, 16mm, and 20mm respectively, and the step height of the corresponding countersunk hole is 1, 2mm, among which a and g holes are connected, and d and h holes are connected. The e port is the installation hole of the refrigerant electronic expansion valve 3.3, and its aperture is 20mm, 24mm, 28mm, and 32mm. The central axis of the hole and the central axis of the c hole are at an angle of 30°, 40°, 50°, and 60°. Port f is the mounting hole of the refrigerant three-way valve 3.1, the diameter of the hole is 20mm, 23mm, 26mm, 29mm, and the included angle between the central axis of hole f and the central axis of hole c is 80°, 90°, 100°.

[0077] Hole 5.1 is a connecting hole connecting port c and port g, and the hole diameter is 5mm, 6mm, 7mm, and 8mm. Hole 5.2 is a connecting hole connecting port e and port a, and the hole diameter is 5mm, 6mm, 7mm, and 8mm. Hole 5.3 is a connecting hole connecting port e and port h, and the hole diameter is 5mm, 6mm, 7mm, and 8mm. In summary, the 8 connecting ports and 3 channels constitute the core structure of the integrated valve island of the invention.

[0078] Advantages of the present invention:

[0079] 1. Effects of the invented direct heat pump and indirect heat pump systems: Through the two automotive heat pump thermal management systems of the invention, the two systems can maximize the use of the air environment and the waste heat of the battery or electric drive system in the three heat systems of the passenger compartment, battery and electric drive system, and ambient air to heat the passenger compartment. Reduce the mode of PTC heater directly using battery power for heating, increase battery life, and reduce power consumption.

[0080] 2. Reduction of spatial dimensions: Through the integrated heat pump valve island system of the invention, the core functional components of the thermal management on the high-pressure side of the thermal management system architecture of the invention are integrated and arranged, and connected by means of a spatial integrated valve island. The layout of each system is centrally arranged and controlled, which greatly reduces the layout space of each system and improves the spatial layout efficiency of the entire vehicle.

[0081] 3. Reduced weight, cost and maintenance: The present invention reduces the connecting pipes and brackets of each core component through the integrated layout of the integrated valve island system, reduces the weight and cost caused by the pipeline, reduces the amount of refrigerant and coolant added, and reduces the system cost and weight.

[0082] 4. In after-sales maintenance, the vulnerable parts on the high-voltage side are integrated separately, which is convenient for replacement and maintenance, reducing after-sales maintenance costs.

[0083] The above shows and describes the basic principles and main structural features of the present invention. The present invention is not limited to the above examples. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An integrated heat pump liquid storage and drying valve island system, characterized in that: It includes an integrated valve island system, a compressor, an air-conditioning heating system, an external heat exchanger, an air-conditioning evaporator, and a battery cooling evaporator respectively connected to the integrated valve island system, the air-conditioning evaporator is connected to the integrated valve island system through a first electronic expansion valve, and the battery cooling evaporator is connected to the integrated valve island system through a second electronic expansion valve; the other ends of the air-conditioning evaporator and the battery cooling evaporator are respectively connected to the inlet end of the compressor; the integrated valve island system is used to realize the cooling and heating mode switching of the integrated heat pump liquid storage drying valve island system.

2. The integrated heat pump liquid storage and drying valve island system according to claim 1, characterized in that: The integrated valve island system includes a liquid storage dry tank located on the high-pressure side of the heat pump system, a valve island body, a refrigerant three-way valve, a refrigerant electronic expansion valve, and a refrigerant check valve. Refrigerant circulation holes are provided on the liquid storage dry tank and the valve island body. The refrigerant three-way valve, the refrigerant electronic expansion valve, and the refrigerant check valve are respectively connected to the interfaces on the valve island body.

3. The integrated heat pump liquid storage and drying valve island system according to claim 2, characterized in that: The interfaces on the valve island body include a one-way valve interface, an external heat exchanger interface, a compressor interface, and an evaporator interface. The one-way valve interface is respectively connected to the refrigerant electronic expansion valve and the external heat exchanger, the external heat exchanger interface is respectively connected to the refrigerant three-way valve and the external heat exchanger, the compressor interface is connected to the refrigerant three-way valve, and the evaporator interface is respectively connected to the air-conditioning evaporator and the battery cooling evaporator.

4. The integrated heat pump liquid storage and drying valve island system according to claim 3, characterized in that: When the integrated heat pump liquid storage and drying valve island system enters the passenger compartment air source heat pump heating, the refrigerant after the compressed refrigerant heat exchange enters the refrigerant three-way valve from the compressor interface. The valve is open to the left and right but not to the lower right. The refrigerant flows through the liquid storage and drying tank, expands through the refrigerant electronic expansion valve, and then enters the external heat exchanger through the one-way valve interface. At this time, the refrigerant absorbs the waste heat of the air to heat the passenger compartment to realize the air source heat pump heating function.

5. The integrated heat pump liquid storage and drying valve island system according to claim 3, characterized in that: When the integrated heat pump liquid storage and drying valve island system enters the passenger compartment water source heat pump heating, the refrigerant after the compressed refrigerant heat exchange enters the refrigerant three-way valve from the compressor interface. The valve is open to the left and right but not to the lower right. The refrigerant flows out of the evaporator interface through the liquid storage and drying tank. At this time, the refrigerant electronic expansion valve is closed, and the outflowing refrigerant expands through the second electronic expansion valve and passes through the battery cooling evaporator to absorb the heat of the battery or electric drive coolant water source and returns to the compressor to realize the passenger compartment water source heat pump heating function.

6. The integrated heat pump liquid storage and drying valve island system according to claim 3, characterized in that: When the integrated heat pump liquid storage and drying valve island system enters the passenger compartment cooling mode, the compressed refrigerant enters the refrigerant three-way valve from the compressor interface. The valve is blocked on the left and right but open on the lower right. The refrigerant flows out through the external heat exchanger interface to the external heat exchanger for external heat exchange condensation. The liquid refrigerant returns to the liquid storage and drying integrated valve island system through the one-way valve interface and is stored in the liquid storage and drying tank. At this time, the refrigerant electronic expansion valve is closed, and the liquid refrigerant flows out from the evaporator interface to the outside, expands through the first electronic expansion valve, and flows into the air-conditioning evaporator to absorb the heat of the passenger compartment air, thereby achieving passenger compartment cooling.

7. The integrated heat pump liquid storage and drying valve island system according to claim 1, characterized in that: The air conditioning heating system is an air conditioning heater, which is used in a direct heat pump system. The air conditioning heater is connected to the compressor outlet and the integrated valve island system respectively.

8. The integrated heat pump liquid storage and drying valve island system according to claim 1, characterized in that: The air conditioning heating system comprises a water-cooled condenser and an air conditioning warm air heat exchanger, and is used in an indirect heat pump system. The water-cooled condenser is respectively connected to the compressor outlet and the integrated valve island system, and the air conditioning warm air heat exchanger is connected to the water-cooled condenser.

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