Five-way valve, vehicle thermal management system and control method of vehicle thermal management system

Abstract

The invention provides a five-way valve, a vehicle thermal management system and a control method thereof.The five-way valve comprises a valve body shell and a circular valve element, the valve body shell is provided with a circular containing groove, five connecting pipes are formed on the valve body shell, the connecting pipes are arranged in the circumferential direction of the circular containing groove and communicate with the circular containing groove, and the circular valve element is contained in the circular containing groove; a first flow channel and a second flow channel which are isolated from each other are formed in the round valve element, the first flow channel is provided with a first port, a second port and a third port which are communicated with each other, and the second flow channel is provided with a fourth port and a fifth port which are communicated with each other. The first port, the second port, the third port, the fourth port and the fifth port are sequentially arranged at intervals in the circumferential direction of the circular valve element, and the circular valve element can be driven to rotate around the central axis of the circular containing groove so that the corresponding communication relation between the ports and the connecting pipes can be adjusted. The control logic of the system can be simplified while the system pipeline design is simplified, and the design difficulty and design cost of the system are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to a five-way valve, a vehicle thermal management system and a control method thereof. Background Art

[0002] With the global requirements for environmental protection and low carbonization, the future development of the bus industry will inevitably be based on new energy. New energy buses are required to develop greenly in accordance with technical requirements such as high mileage and low power consumption rate. Green and environmentally friendly development is needed to ensure the efficient operation of the battery in order to improve the efficiency and life of the battery, as well as the environmentally friendly use of heat from the heat-generating components of the entire vehicle.

[0003] In order to increase the life and performance of the battery and enable it to adapt to severe weather environments, the relevant technology combines an independent battery thermal management system with an independent heat pump air-conditioning system to form an integrated vehicle thermal management system. This integrated vehicle thermal management system requires multiple two-position four-way valves or three-way valves to control the flow path. The use of multiple two-position four-way valves or three-way valves to control the flow path requires more complex piping, especially for vehicles, where the space for assembly is small, which makes the system's piping design difficult and costly. Summary of the invention

[0004] Therefore, the present invention provides a five-way valve, a vehicle thermal management system and a control method thereof, which can solve the technical problem that the vehicle thermal management system in the prior art uses multiple two-position four-way valves or three-way valves to control the flow path, resulting in high difficulty and high design cost of the system pipeline design.

[0005] In order to solve the above problems, the present invention provides a five-way valve, including a valve body shell and a circular valve core, the valve body shell having a circular receiving groove, the valve body shell being formed with five connecting pipes, namely, a first connecting pipe, a second connecting pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe, each connecting pipe being arranged in sequence and spaced apart along the circumferential direction of the circular receiving groove and being connected to the circular receiving groove, the circular valve core being accommodated in the circular receiving groove, a first flow channel and a second flow channel isolated from each other being formed in the circular valve core, the first flow channel having a first port, a second port and a third port which are interconnected, the second flow channel having a fourth port and a fifth port which are interconnected, the first port, the second port, the third port, the fourth port and the fifth port being arranged in sequence and spaced apart along the circumferential direction of the circular valve core, the circular valve core being able to be driven to rotate around the central axis of the circular receiving groove so as to be able to adjust the corresponding connection relationship between each port and each connecting pipe.

[0006] In some embodiments, the connecting pipes are evenly spaced apart along the circumferential direction of the circular receiving groove, and the ports are evenly spaced apart along the circumferential direction of the circular valve core.

[0007] In some embodiments, the five-way valve further includes a rotation driving component, a connecting groove is formed at a central position of the first end surface of the circular valve core, and a rotating shaft of the rotation driving component is inserted into the connecting groove.

[0008] In some embodiments, when the circular valve core has an initial flow path state, a first flow path state and a second flow path state relative to the valve body shell, when the circular valve core is in the initial flow path state, the first connecting pipe is correspondingly connected to the first port, the second connecting pipe is correspondingly connected to the second port, the third connecting pipe is correspondingly connected to the third port, the fourth connecting pipe is correspondingly connected to the fourth port, and the fifth connecting pipe is correspondingly connected to the fifth port; when the circular valve core is in the first flow path state, the first connecting pipe is correspondingly connected to the fifth port, the second connecting pipe is correspondingly connected to the first port, the third connecting pipe is correspondingly connected to the second port, the fourth connecting pipe is correspondingly connected to the third port, and the fifth connecting pipe is correspondingly connected to the fourth port; when the circular valve core is in the second flow path state, the first connecting pipe is correspondingly connected to the second port, the second connecting pipe is correspondingly connected to the third port, the third connecting pipe is correspondingly connected to the fourth port, the fourth connecting pipe is correspondingly connected to the fifth port, and the fifth connecting pipe is correspondingly connected to the first port.

[0009] The present invention also provides a vehicle thermal management system, comprising a five-way valve, wherein the five-way valve is the five-way valve mentioned above.

[0010] In some embodiments, the vehicle thermal management system also includes a compressor, an indoor heat exchanger, a first throttling element, an outdoor heat exchanger, a second throttling element and a battery heat exchanger, the exhaust port of the compressor is connected to the first connecting pipe, the first side inlet and outlet of the battery heat exchanger are connected to the second connecting pipe, the first side inlet and outlet of the indoor heat exchanger are connected to the third connecting pipe, the suction port of the compressor is connected to the fourth connecting pipe, the first side inlet and outlet of the outdoor heat exchanger are connected to the fifth connecting pipe, the second side inlet and outlet of the outdoor heat exchanger are connected to the second side inlet and outlet of the indoor heat exchanger via the first throttling element, and the second side inlet and outlet of the outdoor heat exchanger are also connected to the second side inlet and outlet of the battery heat exchanger via the second throttling element.

[0011] In some embodiments, a gas-liquid separator is also connected in series on the pipeline between the air intake of the compressor and the fourth connecting pipe.

[0012] The present invention also provides a control method for the vehicle thermal management system as described above, comprising the following steps:

[0013] Obtaining an operating mode of the vehicle thermal management system;

[0014] According to the acquired operation mode, the five-way valve is controlled so that the circular valve element is in a flow path state corresponding to the operation mode.

[0015] In some embodiments, when the operation mode is a cabin and battery heating mode, the circular valve core is controlled to be in an initial flow path state; or,

[0016] When the operation mode is a cabin and battery cooling mode, the circular valve core is controlled to be in a first flow path state; or,

[0017] When the operation mode is the cabin cooling battery heating mode, the circular valve core is controlled to be in the second flow path state.

[0018] In some embodiments, when the vehicle thermal management system receives a mode switching control instruction, the current operating mode and the target operating mode of the vehicle thermal management system are obtained, the flow path states of the circular valve core in the current operating mode and the target operating mode are obtained, respectively, the rotation angle of the circular valve core is obtained according to the corresponding flow path state, and the circular valve core is controlled to rotate the rotation angle along the target direction.

[0019] A five-way valve, a vehicle thermal management system and a control method thereof provided by the present invention have the following beneficial effects:

[0020] A first flow channel with three interconnected ports and a second flow channel with two interconnected ports are formed in the circular valve core of the five-way valve, and five connecting pipes are formed on the valve body shell of the five-way valve. The circular valve core is rotated to achieve corresponding connection between the ports thereon and the connecting pipes, thereby meeting the flow switching requirements of different operating modes of the air-conditioning system to which it is applied. Since the first flow channel in the present application has three interconnected ports at the same time, the flow switching requirements in more operating modes can be met by switching the circular valve core with fewer positions. There is no need to use multiple four-way valves or two-way valves in the prior art to control the flow switching. While simplifying the system piping design, it can also simplify the system control logic and reduce the difficulty and cost of system design. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a five-way valve according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A schematic cross-sectional view of a five-way valve is shown;

[0024] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the circular valve core;

[0025] Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the middle valve body shell;

[0026] Figure 5 : is a schematic diagram of the principle of a vehicle thermal management system according to an embodiment of the present invention. At this time, the vehicle thermal management system is operated in a cabin and battery heating mode. The circular valve core in the five-way valve in the figure is in an initial flow path state.

[0027] Figure 6 : is a schematic diagram of the principle of a vehicle thermal management system according to an embodiment of the present invention. At this time, the vehicle thermal management system is operated in a cabin and battery cooling mode. The circular valve core in the five-way valve in the figure is in a first flow path state.

[0028] Figure 7 It is a schematic diagram of the principle of a vehicle thermal management system according to an embodiment of the present invention. At this time, the operation mode of the vehicle thermal management system is the cabin cooling battery heating mode, and the circular valve core in the five-way valve in the figure is in the second flow path state.

[0029] The accompanying drawings are marked as follows:

[0030] 1. Valve body shell;

[0031] 11. Circular receiving groove; 121. First connecting pipe; 122. Second connecting pipe; 123. Third connecting pipe; 124. Fourth connecting pipe; 125. Fifth connecting pipe;

[0032] 2. Round valve core;

[0033] 21. first flow channel; 211. first port; 212. second port; 213. third port; 214. fourth port; 215. fifth port; 22. second flow channel; 23. connecting groove;

[0034] 100, five-way valve; 101, compressor; 102, indoor heat exchanger; 1021, indoor fan; 103, first throttling element; 104, outdoor heat exchanger; 1041, outdoor fan; 105, second throttling element; 106, battery heat exchanger; 107, gas-liquid separator; 108, filter. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0037] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90° or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0038] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0039] See also Figure 1 and Figure 7As shown, according to an embodiment of the present invention, a five-way valve is provided, including a valve body shell 1 and a circular valve core 2, the valve body shell 1 having a circular receiving groove 11, the valve body shell 1 having five connecting pipes, namely, a first connecting pipe 121, a second connecting pipe 122, a third connecting pipe 123, a fourth connecting pipe 124 and a fifth connecting pipe 125, each connecting pipe being arranged in sequence at intervals along the circumferential direction of the circular receiving groove 11 and being communicated with the circular receiving groove 11, the circular valve core 2 being accommodated in the circular receiving groove 11, a first flow channel 21 and a second flow channel 22 isolated from each other being formed in the circular valve core 2, the first flow channel 21 having a first port 211, a second port 212 and a third port 213 communicating with each other, the second flow channel 22 having a fourth port 214 and a fifth port 215 communicating with each other, the first port 211, the second port 212, the third port 213, the fourth port 214 and the fifth port 215 being arranged in sequence at intervals along the circumferential direction of the circular valve core 2 The circular valve core 2 can be driven to rotate around the central axis of the circular receiving groove 11 so as to adjust the corresponding communication relationship between each port and each connecting pipe. It can be understood that the circular diameters of the circular valve core 2 and the circular receiving groove 11 match each other (approximately equal), and the circular valve core 2 can rotate in the circular receiving groove 11. A corresponding sealing member should also be provided between the circular valve core 2 and the circular receiving groove 11 to ensure the sealing of the circulating medium (such as refrigerant) when the circular valve core 2 is driven to rotate to adjust the corresponding communication relationship between each port and each connecting pipe. The aforementioned sealing member, for example, includes sealing rings (not shown in the figure) that are independently located on the outer periphery of the pipe mouth of each connecting pipe on the groove vertical wall of the circular receiving groove 11 or sealing rings (not shown in the figure) that are respectively disposed on the outer periphery of each port, and correspondingly, a corresponding annular groove (not shown in the figure) for accommodating the aforementioned sealing ring is formed on the outer circumferential wall of the circular receiving groove 11 or the circular valve core 2.

[0040] In this technical solution, a first flow channel 21 with three interconnected ports and a second flow channel 22 with two interconnected ports are formed in the circular valve core 2 of the five-way valve, and five connecting pipes are formed on the valve body shell 1 of the five-way valve. The corresponding connection between the ports thereon and the connecting pipes is achieved by rotating the circular valve core 2, so that the flow switching requirements of different operating modes of the air-conditioning system to which it is applied can be met. Since the first flow channel 21 in the present application has three interconnected ports at the same time, the circular valve core 2 can be switched to a small number of positions to meet the flow switching requirements in more operating modes. There is no need to use multiple four-way valves or two-way valves in the prior art to control the flow switching. While simplifying the system piping design, it can also simplify the system control logic and reduce the difficulty and cost of system design.

[0041] In some embodiments, the connecting pipes are evenly spaced apart along the circumferential direction of the circular receiving groove 11 , and the ports are evenly spaced apart along the circumferential direction of the circular valve core 2 .

[0042] In this technical solution, the five pipes and five ports are evenly spaced along the circumferential direction, that is, the central angles of two adjacent pipes or ports are all 72°, so that the corresponding connected positions of the positions of each interface and port are clear and fixed. At this time, it can be understood that the rotation control of the circular valve core 2 is 72° as the rotation step unit, which can further simplify the rotation positioning control of the circular valve core 2. It is worth emphasizing that the evenly spaced arrangement can also improve the scalability of the flow path switching of the five-way valve, so that the five-way valve objectively has the function of five-position five-way and higher flow path switching capability.

[0043] See Figure 2 As shown, the first connecting pipe 121 is defined as the D port, the second connecting pipe 122 is defined as the E2 port, the third connecting pipe 123 is defined as the E1 port, the fourth connecting pipe 124 is defined as the S port, and the fifth connecting pipe 125 is defined as the C port. Figure 2 The state shown is the initial flow path state. In this way, it can be rotated counterclockwise in 72° steps to achieve the corresponding connection between different pipes and ports. For details, please refer to the table below:

[0044] Counterclockwise rotation angle Takeover connection correspondence Takeover connection correspondence 0° C.S D, E1, E2 72° C.D S, E1, E2 144° D. E2 C, S, E1 216° E1, E2 C, S, D 288° S, E1 C, D, E2

[0045] The aforementioned connecting pipes can be formed on the outer circumferential wall of the valve body shell 1 by assembling or welding.

[0046] In some embodiments, the five-way valve also includes a rotary drive component (not shown in the figure), and a connecting groove 23 is formed at the center position of the first end surface of the circular valve core 2, and the rotating shaft of the rotary drive component is inserted into the connecting groove 23. The aforementioned rotary drive component can be, for example, a rotary motor.

[0047] In this technical solution, the five-way valve is equipped with corresponding rotation drive components, which can improve the integration of the five-way valve.

[0048] In another feasible embodiment, the valve body shell 1 is assembled by including an open shell (not marked in the figure) and a cover plate (not shown in the figure) covering the opening of the open shell. The opening space of the open shell is also the aforementioned circular receiving groove 11. The aforementioned cover plate has a through hole adapted to the position of the connecting groove 23 to ensure that the rotating shaft of the rotating drive component passes through the cover plate and is connected to the connecting groove 23.

[0049] In this technical solution, the cover plate can form a seal on the open side of the open shell to prevent external dust and other debris from entering the matching gap between the circular valve core 2 and the valve body shell 1, thereby ensuring smooth position switching.

[0050] In some embodiments, when the circular valve core 2 has an initial flow path state, a first flow path state and a second flow path state relative to the valve body housing 1, when the circular valve core 2 is in the initial flow path state (see Figure 5 As shown), the first connecting pipe 121 is connected to the first port 211, the second connecting pipe 122 is connected to the second port 212, the third connecting pipe 123 is connected to the third port 213, the fourth connecting pipe 124 is connected to the fourth port 214, and the fifth connecting pipe 125 is connected to the fifth port 215; when the circular valve core 2 is in the first flow path state (see Figure 6 As shown), the first connecting pipe 121 is connected to the fifth port 215, the second connecting pipe 122 is connected to the first port 211, the third connecting pipe 123 is connected to the second port 212, the fourth connecting pipe 124 is connected to the third port 213, and the fifth connecting pipe 125 is connected to the fourth port 214; when the circular valve core 2 is in the second flow path state (see Figure 7 As shown), the first connecting pipe 121 is connected to the second port 212, the second connecting pipe 122 is connected to the third port 213, the third connecting pipe 123 is connected to the fourth port 214, the fourth connecting pipe 124 is connected to the fifth port 215, and the fifth connecting pipe 125 is connected to the first port 211.

[0051] In this technical solution, the circular valve core 2 of the five-way valve can switch between the initial flow path state, the first flow path state and the second flow path state. When it is applied to the corresponding vehicle thermal management system, it can meet the system's switching between the cabin and battery simultaneous heating mode, the cabin and battery simultaneous cooling mode, and the cabin cooling and battery heating mode, simplifying the system piping design, reducing piping assembly components and reducing system design costs.

[0052] According to an embodiment of the present invention, a vehicle thermal management system is also provided, comprising a five-way valve 100, wherein the five-way valve 100 is the five-way valve described above. Figures 5 to 7As shown, the vehicle thermal management system also includes a compressor 101, an indoor heat exchanger 102 (equipped with an indoor fan 1021), a first throttling element 103 (specifically, for example, an electronic expansion valve), an outdoor heat exchanger 104 (equipped with an outdoor fan 1041), a second throttling element 105 (specifically, for example, an electronic expansion valve) and a battery heat exchanger 106, the exhaust port of the compressor 101 is connected to the first connecting pipe 121, the first side inlet and outlet of the battery heat exchanger 106 are connected to the second connecting pipe 122, the first side inlet and outlet of the indoor heat exchanger 102 are connected to the third connecting pipe 123, the air intake port of the compressor 101 is connected to the fourth connecting pipe 124, the first side inlet and outlet of the outdoor heat exchanger 104 are connected to the fifth connecting pipe 125, and the second side inlet and outlet of the outdoor heat exchanger 104 are connected to the fifth connecting pipe 125 via the The first throttling element 103 is connected to the second side inlet and outlet of the indoor heat exchanger 102, and the second side inlet and outlet of the outdoor heat exchanger 104 is also connected to the second side inlet and outlet of the battery heat exchanger 106 via the second throttling element 105, that is, the pipelines where the indoor heat exchanger 102 and the battery heat exchanger 106 are respectively located form a parallel connection of the refrigerant, wherein the first throttling element 103 is used to throttle the refrigerant entering and exiting the indoor heat exchanger 102, and the second throttling element 105 is used to throttle the refrigerant entering and exiting the battery heat exchanger 106. In a preferred embodiment, a filter 108 is also provided on the pipelines where the indoor heat exchanger 102 and the battery heat exchanger 106 are respectively located and on the pipeline between the first throttling element 103 and the outdoor heat exchanger 104 to ensure the cleanliness of the refrigerant. The aforementioned battery heat exchanger 106 is specifically a plate heat exchanger, which has a refrigerant flow path connected in parallel with the indoor heat exchanger 102 and a coolant flow path (such as a water circulation flow path, etc.) circulated and connected to the battery heat dissipation component. The coolant flow path and the refrigerant flow path exchange heat in the battery heat exchanger 106.

[0053] In this technical solution, the vehicle thermal management system can switch the system between the simultaneous heating mode of the cabin and the battery, the simultaneous cooling mode of the cabin and the battery, and the cabin cooling and battery heating mode by adjusting the position of the circular valve core 2 in the aforementioned five-way valve, thereby simplifying the system piping design, reducing piping assembly components and lowering system design costs.

[0054] In another preferred embodiment, a gas-liquid separator 107 is further connected in series on the pipeline between the air intake of the compressor 101 and the fourth connecting pipe 124 .

[0055] In this technical solution, by setting a gas-liquid separator 107 before the air intake of the compressor 101, the liquid phase component in the intake air flow can be separated to prevent the liquid refrigerant from being sucked into the compressor 101 and causing the compressor intake air to carry liquid.

[0056] According to an embodiment of the present invention, there is also provided a control method for the vehicle thermal management system as described above, comprising the following steps:

[0057] Acquiring an operating mode of the vehicle thermal management system, the operating modes including a cabin and battery simultaneous heating mode, a cabin and battery simultaneous cooling mode, and a cabin cooling and battery heating mode;

[0058] According to the acquired operation mode, the five-way valve 100 is controlled so that the circular valve core 2 is in a flow path state corresponding to the operation mode.

[0059] Specifically, when the operation mode is the cabin and battery heating mode, the circular valve core 2 is controlled to be in the initial flow path state, see Figure 5 As shown, at this time, the first connecting pipe 121 is correspondingly connected to the first port 211, the second connecting pipe 122 is correspondingly connected to the second port 212, the third connecting pipe 123 is correspondingly connected to the third port 213, the fourth connecting pipe 124 is correspondingly connected to the fourth port 214, and the fifth connecting pipe 125 is correspondingly connected to the fifth port 215. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 101 enters the first flow channel 21 through the first connecting pipe 121 of the five-way valve 100, and is divided into the second connecting pipe 122 and the third connecting pipe 123 in the first flow channel 21, and then flows into the indoor heat exchanger 102 and the battery heat exchanger 106 respectively, so as to form simultaneous heating of the cabin and the battery. The pipeline design and control logic are particularly simple. The refrigerant flowing out after heat exchange in the indoor heat exchanger 102 and the battery heat exchanger 106 flows to the outdoor heat exchanger 104 for heat exchange and vaporization, and then enters the second flow channel 22 through the fifth connecting pipe 125 of the five-way valve 100 and finally flows back to the compressor 101 through the fourth connecting pipe 124, forming a complete heating cycle.

[0060] Alternatively, when the operation mode is the cabin and battery cooling mode, the circular valve core 2 is controlled to be in the first flow path state, see Figure 6As shown, at this time, the first connecting pipe 121 is correspondingly connected to the fifth port 215, the second connecting pipe 122 is correspondingly connected to the first port 211, the third connecting pipe 123 is correspondingly connected to the second port 212, the fourth connecting pipe 124 is correspondingly connected to the third port 213, and the fifth connecting pipe 125 is correspondingly connected to the fourth port 214. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 101 enters the second flow channel 22 through the first connecting pipe 121 of the five-way valve 100 and flows into the outdoor heat exchanger 104 through the fifth connecting pipe 125 to exchange heat with the external environment, and then enters the indoor heat exchanger 102 and the battery heat exchanger 106 respectively. The refrigerant evaporates and absorbs heat in the indoor heat exchanger 102 and the battery heat exchanger 106 to form a refrigeration purpose. The refrigerant after heat exchange is collected in the first flow channel 21 through the second connecting pipe 122 and the third connecting pipe 123 of the five-way valve 100 and finally flows back to the compressor 101 through the fourth connecting pipe 124, completing a complete refrigeration cycle.

[0061] Alternatively, when the operating mode is the cabin cooling battery heating mode, the circular valve core 2 is controlled to be in the second flow path state, see Figure 7 As shown, at this time, the first connecting pipe 121 is correspondingly connected to the second port 212, the second connecting pipe 122 is correspondingly connected to the third port 213, the third connecting pipe 123 is correspondingly connected to the fourth port 214, the fourth connecting pipe 124 is correspondingly connected to the fifth port 215, and the fifth connecting pipe 125 is correspondingly connected to the first port 211. At this time, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 101 enters the second flow channel 22 through the first connecting pipe 121 of the five-way valve 100 and flows into the outdoor heat exchanger 104 through the fifth connecting pipe 125 to exchange heat with the external environment, and then enters the indoor heat exchanger 102 and the battery heat exchanger 106 respectively. The refrigerant evaporates and absorbs heat in the indoor heat exchanger 102 and the battery heat exchanger 106 to form a refrigeration purpose. The refrigerant after heat exchange is collected in the first flow channel 21 through the second connecting pipe 122 and the third connecting pipe 123 of the five-way valve 100 and finally flows back to the compressor 101 through the fourth connecting pipe 124, completing a complete refrigeration cycle.

[0062] In some embodiments, when the vehicle thermal management system receives a mode switching control instruction (the instruction may be a manually triggered instruction or an instruction intelligently issued by a controller in the system), the current operating mode and the target operating mode of the vehicle thermal management system are obtained, the flow path states of the circular valve core 2 in the current operating mode and the target operating mode are obtained, the rotation angle of the circular valve core 2 is obtained according to the corresponding flow path states, and the circular valve core 2 is controlled to rotate in the target direction by the rotation angle. For example, when the current operating mode is the cabin and battery synchronous heating mode and the target operating mode is the cabin and battery synchronous cooling mode, the circular valve core 2 is controlled to rotate counterclockwise by 72° (with the rotation angle being 0.045°). Figure 5 The state shown is with the original rotation point as a reference). When the current operating mode is the cabin and battery synchronous heating mode and the target operating mode is the cabin cooling and battery heating mode, the circular valve core 2 is controlled to rotate 288° counterclockwise. Conversely, when the current operating mode is the cabin cooling and battery heating mode and the target operating mode is the cabin and battery synchronous heating mode, the circular valve core 2 is controlled to rotate 288° clockwise, and so on.

[0063] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A five-way valve, characterized in that: The invention comprises a valve body shell (1) and a circular valve core (2), wherein the valve body shell (1) has a circular receiving groove (11), and the valve body shell (1) is formed with five connecting pipes, namely a first connecting pipe (121), a second connecting pipe (122), a third connecting pipe (123), a fourth connecting pipe (124) and a fifth connecting pipe (125), each connecting pipe being arranged in sequence and spaced apart along the circumferential direction of the circular receiving groove (11) and being connected to the circular receiving groove (11), the circular valve core (2) being accommodated in the circular receiving groove (11), and the circular valve core (2) being formed with a first flow channel (21) and a second flow channel (22) which are isolated from each other. ), the first flow channel (21) has a first port (211), a second port (212) and a third port (213) which are interconnected, the second flow channel (22) has a fourth port (214) and a fifth port (215) which are interconnected, the first port (211), the second port (212), the third port (213), the fourth port (214) and the fifth port (215) are arranged in sequence along the circumferential direction of the circular valve core (2), and the circular valve core (2) can be driven to rotate around the central axis of the circular receiving groove (11) so as to adjust the corresponding communication relationship between each port and each connecting pipe.

2. The five-way valve according to claim 1, characterized in that: The connecting pipes are arranged at even intervals along the circumferential direction of the circular receiving groove (11), and the ports are arranged at even intervals along the circumferential direction of the circular valve core (2).

3. The five-way valve according to claim 1, characterized in that: It also comprises a rotary drive component, a connecting groove (23) is formed at the center of the first end surface of the circular valve core (2), and a rotating shaft of the rotary drive component is inserted into the connecting groove (23).

4. The five-way valve according to claim 1, characterized in that: When the circular valve core (2) has an initial flow path state, a first flow path state and a second flow path state relative to the valve body housing (1), when the circular valve core (2) is in the initial flow path state, the first connecting pipe (121) is correspondingly connected to the first port (211), the second connecting pipe (122) is correspondingly connected to the second port (212), the third connecting pipe (123) is correspondingly connected to the third port (213), the fourth connecting pipe (124) is correspondingly connected to the fourth port (214), and the fifth connecting pipe (125) is correspondingly connected to the fifth port (215); when the circular valve core (2) is in the first flow path state, the first connecting pipe (121) is correspondingly connected to the fifth port (215), the second connecting pipe (122) is correspondingly connected to the second port (212), the third connecting pipe (123) is correspondingly connected to the third port (213), the fourth connecting pipe (124) is correspondingly connected to the fourth port (214), and the fifth connecting pipe (125) is correspondingly connected to the fifth port (215). The first connecting pipe (121) is connected to the second port (212), the second connecting pipe (122) is connected to the third port (213), the third connecting pipe (123) is connected to the fourth port (214), the fourth connecting pipe (124) is connected to the third port (213), and the fifth connecting pipe (125) is connected to the fourth port (214); when the circular valve core (2) is in the second flow path state, the first connecting pipe (121) is connected to the second port (212), the second connecting pipe (122) is connected to the third port (213), the third connecting pipe (123) is connected to the fourth port (214), the fourth connecting pipe (124) is connected to the fifth port (215), and the fifth connecting pipe (125) is connected to the first port (211).

5. A vehicle thermal management system, characterized in that: It comprises a five-way valve (100), wherein the five-way valve (100) is the five-way valve according to any one of claims 1 to 4.

6. The vehicle thermal management system according to claim 5, characterized in that: The invention also comprises a compressor (101), an indoor heat exchanger (102), a first throttling element (103), an outdoor heat exchanger (104), a second throttling element (105) and a battery heat exchanger (106), wherein the exhaust port of the compressor (101) is connected to the first connecting pipe (121), the first side inlet and outlet of the battery heat exchanger (106) are connected to the second connecting pipe (122), the first side inlet and outlet of the indoor heat exchanger (102) are connected to the third connecting pipe (123), and the compressor (101) is connected to the first connecting pipe (121). The air intake port of the machine (101) is connected to the fourth connecting pipe (124), the first side inlet and outlet of the outdoor heat exchanger (104) is connected to the fifth connecting pipe (125), the second side inlet and outlet of the outdoor heat exchanger (104) is connected to the second side inlet and outlet of the indoor heat exchanger (102) via the first throttling element (103), and the second side inlet and outlet of the outdoor heat exchanger (104) is also connected to the second side inlet and outlet of the battery heat exchanger (106) via the second throttling element (105).

7. The vehicle thermal management system according to claim 6, characterized in that: A gas-liquid separator (107) is also connected in series on the pipeline between the air intake port of the compressor (101) and the fourth connecting pipe (124).

8. A control method for a vehicle thermal management system according to claim 6 or 7, characterized in that: The steps include: Obtaining an operating mode of the vehicle thermal management system; According to the acquired operation mode, the five-way valve (100) is controlled so that the circular valve core (2) is in a flow path state corresponding to the operation mode.

9. The control method according to claim 8, characterized in that: When the operation mode is a cabin and battery heating mode, the circular valve core (2) is controlled to be in an initial flow path state; or, When the operation mode is a cabin and battery cooling mode, the circular valve core (2) is controlled to be in a first flow path state; or, When the operation mode is a cabin refrigeration battery heating mode, the circular valve core (2) is controlled to be in a second flow path state.

10. The control method according to claim 9, characterized in that: When the vehicle thermal management system receives a mode switching control instruction, the current operating mode and the target operating mode of the vehicle thermal management system are obtained, the flow path states of the circular valve core (2) in the current operating mode and the target operating mode are obtained respectively, the rotation angle of the circular valve core (2) is obtained according to the corresponding flow path state, and the circular valve core (2) is controlled to rotate along the target direction by the rotation angle.

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