Labyrinth valve, vehicle heat management system, and new energy vehicle

Abstract

A labyrinth valve, a vehicle heat management system, and a new energy vehicle. The labyrinth valve (10) comprises a valve body (100), a valve core (200) and a driving assembly (300); a first interface (110), a second interface (111), a third interface (112), a fourth interface (113), a fifth interface (114), a sixth interface (115), a seventh interface (116), an eighth interface (117), a ninth interface (118), a tenth interface (119) and an eleventh interface (120) are arranged in the outer wall of the valve body (100); the fourth interface (113) is communicated with the fifth interface (114), and the valve core (200) is arranged in a cavity. A plurality of interfaces are arranged on the valve body (100), a plurality of flow channels are arranged in the valve core (200), and a plurality of flow guide grooves are formed in the peripheral surface of the valve core (200). The valve core (200) is switched between a cooling state and a heating state, so that the flow guide grooves cooperate with the flow channels to communicate different interfaces, thereby achieving the combined function of a plurality of refrigerant valves; by replacing a refrigerant electromagnetic pilot valve, a refrigerant three-way electromagnetic valve, an electronic expansion valve, a refrigerant one-way valve and the like, the costs of the vehicle heat management system are reduced while improving the heat exchange efficiency, reducing the energy consumption and reducing the weight of the system.

Description

A labyrinth valve, vehicle thermal management system and new energy vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 202410165440.6 filed on February 5, 2024, entitled “A labyrinth valve, a thermal management system for a vehicle and a new energy vehicle”, and claims priority to Chinese patent application number 202420280481.5 filed on February 5, 2024, entitled “A labyrinth valve, a thermal management system for a vehicle and a new energy vehicle”, all of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of valve technology, and in particular to a labyrinth valve, a vehicle thermal management system and a new energy vehicle. Background Art

[0004] Current automotive thermal management systems can be broadly categorized into two types. The first type uses coolant as the primary circulating medium, which acts as a heat transporter during circulation. The refrigerant circuit is extremely simple, with the four major components of the refrigeration system (compressor, condenser, expansion valve, and evaporator) located within a single circuit. Whether the system is operating in cooling or heating mode, the refrigerant flow remains unchanged. By adjusting the coolant's circuit direction or flow rate, the vehicle's passenger compartment functions can be switched between cooling, heating, and dehumidification, as well as battery cooling and heating. Coolant circuit regulation relies on a coolant multi-way valve, which opens and closes different coolant circuits by rotating the valve core. The second type uses refrigerant as the primary circulating medium, maintaining an extremely simple coolant circuit. Using the refrigerant circuit as the primary circulating medium avoids the secondary heat exchange problem of the first type of system. Secondary heat exchange occurs when the refrigerant first transfers heat to the coolant, which then transfers heat to the air. This second type of system can directly transfer heat from the refrigerant to the air, thereby improving heat exchange efficiency. When the system switches between cooling, heating and dehumidification states, the refrigerant circuit changes the direction and flow of the refrigerant through the adjustment of various valves.

[0005] The first type of automotive thermal management system requires secondary heat exchange, resulting in lower heat exchange efficiency and higher power consumption. This also requires higher coolant refill volumes, resulting in a high coolant density and a heavier overall system weight. In contrast, the second type of automotive thermal management system uses a single heat exchange between the refrigerant and air, resulting in higher heat exchange efficiency, lower energy consumption, and greater compatibility with technical solutions such as oil-cooled motors and direct battery cooling and heating. Therefore, the second type of automotive thermal management system offers several advantages over the first type.

[0006] However, the second type of vehicle thermal management system has a large number of various refrigerant valves, and requires the installation of refrigerant pilot solenoid valves, refrigerant three-way solenoid valves, electronic expansion valves, refrigerant one-way valves, etc., resulting in a higher cost of the vehicle thermal management system.

[0007] Summary of the Invention

[0008] The present application provides a labyrinth valve to solve the defect in the prior art that there are a large number of various refrigerant valves in the vehicle thermal management system, which leads to a high cost of the vehicle thermal management system, thereby reducing the cost of the vehicle thermal management system while improving heat exchange efficiency and reducing energy consumption.

[0009] The present application provides a labyrinth valve, comprising:

[0010] A valve body having a cavity therein; an outer wall of the valve body is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, a tenth interface, and an eleventh interface, wherein the fourth interface is in communication with the fifth interface;

[0011] a valve core disposed in the cavity, wherein a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, and a sixth flow channel are disposed inside the valve core; and a first guide groove, a second guide groove, a third guide groove, a fourth guide groove, a fifth guide groove, a sixth guide groove, a seventh guide groove, an eighth guide groove, a ninth guide groove, a tenth guide groove, an eleventh guide groove, and a twelfth guide groove are disposed on an outer circumferential surface of the valve core; wherein the first flow channel is communicated with the first guide groove, the second guide groove, and the fourth guide groove, respectively, the second flow channel is communicated with the third guide groove and the eleventh guide groove, the third flow channel is communicated with the fifth guide groove, the sixth guide groove, and the twelfth guide groove, the fourth flow channel is communicated with the seventh guide groove and the eighth guide groove, the fifth flow channel is communicated with the ninth guide groove and the eleventh guide groove, and the sixth flow channel is communicated with the tenth guide groove and the twelfth guide groove;

[0012] A drive assembly connected to the valve core, the drive assembly being used to drive the valve core to switch between a cooling state and a heating state;

[0013] In the cooling state, the first flow channel is connected to the seventh interface and the tenth interface through the first guide groove, is connected to the eighth interface through the second guide groove, and is connected to the ninth interface through the fourth guide groove; the third flow channel is connected to the eleventh interface through the fifth guide groove, is connected to the sixth interface through the sixth guide groove, and is connected to the third interface through the twelfth guide groove; the fourth flow channel is connected to the second interface through the seventh guide groove, and is connected to the first interface through the eighth guide groove; the sixth flow channel is connected to the fourth interface through the tenth guide groove, and is connected to the third interface through the twelfth guide groove;

[0014] In the heating state, the seventh interface is connected to the tenth interface through the first guide groove, the first flow channel is connected to the eighth interface through the first guide groove, and is connected to the eleventh interface through the fourth guide groove; the second flow channel is connected to the ninth interface through the third guide groove, and is connected to the third interface through the eleventh guide groove; the third flow channel is connected to the sixth interface through the fifth guide groove, and is connected to the second interface through the sixth guide groove; the fifth flow channel is connected to the fourth interface through the ninth guide groove, and is connected to the third interface through the eleventh guide groove.

[0015] According to a labyrinth valve provided in an embodiment of the present application, the drive assembly includes:

[0016] A solenoid valve, wherein a first high-pressure chamber is defined between the end of the first end of the valve core and the valve body, and a second high-pressure chamber is defined between the end of the second end of the valve core and the valve body; the first high-pressure chamber is communicated with the twelfth flow guide groove via the solenoid valve; a seventh flow channel is further provided within the valve core, and the first high-pressure chamber is communicated with the second high-pressure chamber via the seventh flow channel;

[0017] A return spring is provided in the first high-pressure chamber, one end of the return spring abuts against the inner wall of the first high-pressure chamber, and the other end of the return spring abuts against the end of the first end of the valve core.

[0018] According to a labyrinth valve provided in an embodiment of the present application, a first port is provided at the end of the first end of the valve body, a first plug is provided at the first port, and one end of the return spring abuts against the first plug.

[0019] According to a labyrinth valve provided in an embodiment of the present application, a second port is provided at the end of the second end of the valve body, a second port is provided with a second plug, and the second high-pressure chamber is located between the end of the second end of the valve core and the second plug.

[0020] According to a labyrinth valve provided in an embodiment of the present application, the first plug and the second plug are sealed with the inner wall of the cavity via a first sealing ring, respectively.

[0021] According to a labyrinth valve provided in an embodiment of the present application, two adjacent guide grooves are separated by a partition plate, the outer peripheral surface of the partition plate is provided with a groove, and a second sealing ring is provided in the groove to seal with the inner wall of the cavity.

[0022] According to a labyrinth valve provided in an embodiment of the present application, the distance between the outer peripheral surface of the partition plate and the inner wall of the cavity is 0.01 mm-0.025 mm.

[0023] According to a labyrinth valve provided in an embodiment of the present application, inner diameters of the second flow channel, the third flow channel, the fifth flow channel, and the sixth flow channel are all larger than inner diameters of the first flow channel and the fourth flow channel.

[0024] The present application also provides a vehicle thermal management system, including an in-vehicle expansion valve, at least one in-vehicle evaporator, an in-vehicle condenser, an out-vehicle heat exchanger, a vehicle drive system, a battery, a water pump, a compressor, a battery cooling expansion valve and a labyrinth valve described in any one of the above; the compressor is connected in series between the third interface and the tenth interface, and the in-vehicle condenser is connected in series between the eighth interface and the seventh interface; the first connection port of the in-vehicle evaporator is communicated with the fourth interface, and the in-vehicle expansion valve is connected in series between the second connection port of the in-vehicle evaporator and the second interface; the first connection port of the out-vehicle heat exchanger is communicated with the ninth interface, and the out-vehicle The second connection port of the heat exchanger is connected to the first interface, the vehicle drive system is connected in series to the third connection port of the external heat exchanger and the first connection port of the water pump, the fourth connection port of the external heat exchanger is connected to the second connection port of the water pump, the battery is connected in series between the third connection port of the water pump and the first connection port of the battery cooling expansion valve, the fourth connection port of the water pump is connected to the second connection port of the battery cooling expansion valve, the third connection port of the battery cooling expansion valve is connected to the first interface, and the fourth connection port of the battery cooling expansion valve is connected to the sixth interface and the eleventh interface.

[0025] The present application also provides a new energy vehicle, comprising a new energy vehicle body and any one of the above-mentioned labyrinth valves.

[0026] The labyrinth valve provided in the embodiment of the present application is configured by arranging multiple connection ports on the valve body, multiple flow channels inside the valve core, and multiple guide grooves on the outer peripheral surface of the valve core; by switching the valve core between the cooling state and the heating state, the guide grooves and the flow channels cooperate to connect different connection ports, thereby realizing the functions of the combination of multiple refrigerant valves. By replacing the refrigerant pilot solenoid valve, the refrigerant three-way solenoid valve, the electronic expansion valve, the refrigerant one-way valve, etc., the cost of the vehicle thermal management system is reduced while improving the heat exchange efficiency, reducing energy consumption, and reducing the weight of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] FIG1 is a schematic diagram of the three-dimensional structure of a labyrinth valve provided in an embodiment of the present application;

[0029] FIG2 is a schematic diagram of the three-dimensional structure of the valve core provided in an embodiment of the present application;

[0030] FIG3 is a schematic diagram of a side cross-sectional structure of a valve core provided in an embodiment of the present application;

[0031] FIG4 is a second schematic side cross-sectional structural diagram of the valve core provided in an embodiment of the present application;

[0032] FIG5 is a schematic diagram of a side cross-sectional structure of a labyrinth valve provided in an embodiment of the present application;

[0033] FIG6 is a schematic diagram of a partially enlarged structure of point A in FIG5 ;

[0034] FIG7 is a second schematic side cross-sectional structural diagram of a labyrinth valve provided in an embodiment of the present application;

[0035] FIG8 is a schematic diagram of a structure of a vehicle thermal management system according to an embodiment of the present application;

[0036] FIG9 is a schematic structural diagram of a vehicle thermal management system provided by an embodiment of the present application with the valve core in a cooling state;

[0037] FIG10 is a second structural diagram of a vehicle thermal management system provided in an embodiment of the present application;

[0038] FIG11 is a schematic structural diagram of a vehicle thermal management system provided by an embodiment of the present application when the valve core is in a heating state.

[0039] Reference numerals: 10, labyrinth valve; 100, valve body; 110, first interface; 111, second interface; 112, third interface; 113, fourth interface; 114, fifth interface; 115, sixth interface; 116, seventh interface; 117, eighth interface; 118, ninth interface; 119, tenth interface; 120, eleventh interface; 130, first plug; 131, second plug; 132, second sealing ring; 200, valve core; 210, first flow channel; 211, second flow channel; 212, third flow channel; 213, Fourth flow channel; 214, fifth flow channel; 215, sixth flow channel; 216, seventh flow channel; 220, first guide groove; 221, second guide groove; 222, third guide groove; 223, fourth guide groove; 224, fifth guide groove; 225, sixth guide groove; 226, seventh guide groove; 227, eighth guide groove; 228, ninth guide groove; 229, tenth guide groove; 230, eleventh guide groove; 231, twelfth guide groove; 300, drive assembly; 310, solenoid valve; 320, first high-pressure chamber; 330, second high-pressure chamber; 340, return spring. DETAILED DESCRIPTION

[0040] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0042] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0043] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0045] The specific structure of the labyrinth valve in the embodiment of the present application is described below with reference to Figures 1 to 11.

[0046] As shown in Figures 1 to 4, the labyrinth valve 10 includes a valve body 100, a valve core 200 and a drive assembly 300, and the valve body 100 has a cavity inside; the outer wall of the valve body 100 is provided with a first interface 110, a second interface 111, a third interface 112, a fourth interface 113, a fifth interface 114, a sixth interface 115, a seventh interface 116, an eighth interface 117, a ninth interface 118, a tenth interface 119 and an eleventh interface 120, wherein the fourth interface 113 is connected to the fifth interface 114.

[0047] The valve core 200 is arranged in the cavity, and the interior of the valve core 200 is provided with a first flow channel 210, a second flow channel 211, a third flow channel 212, a fourth flow channel 213, a fifth flow channel 214 and a sixth flow channel 215; the outer peripheral surface of the valve core 200 is provided with a first guide groove 220, a second guide groove 221, a third guide groove 222, a fourth guide groove 223, a fifth guide groove 224, a sixth guide groove 225, a seventh guide groove 226, an eighth guide groove 227, a ninth guide groove 228, a tenth guide groove 229, an eleventh guide groove 230 and a twelfth guide groove 231; wherein, the first guide groove 220, the second guide groove 221, the third guide groove 222, the fourth guide groove 223, the fifth guide groove 224, the sixth guide groove 225, the seventh guide groove 226, the eighth guide groove 227, the ninth guide groove 228, the tenth guide groove 229, the eleventh guide groove 230 and the twelfth guide groove 231; The first flow channel 210 is connected to the first guide groove 220, the second guide groove 221 and the fourth guide groove 223 respectively. The second flow channel 211 is connected to the third guide groove 222 and the eleventh guide groove 230. The third flow channel 212 is connected to the fifth guide groove 224, the sixth guide groove 225 and the twelfth guide groove 231. The fourth flow channel 213 is connected to the seventh guide groove 226 and the eighth guide groove 227. The fifth flow channel 214 is connected to the ninth guide groove 228 and the eleventh guide groove 230. The sixth flow channel 215 is connected to the tenth guide groove 229 and the twelfth guide groove 231.

[0048] The driving assembly 300 is connected to the valve core 200 and is used to drive the valve core 200 to switch between the cooling state and the heating state;

[0049] In the cooling state, the first flow channel 210 is connected to the seventh interface 116 and the tenth interface 119 through the first guide groove 220, is connected to the eighth interface 117 through the second guide groove 221, and is connected to the ninth interface 118 through the fourth guide groove 223; the third flow channel 212 is connected to the eleventh interface 120 through the fifth guide groove 224, is connected to the sixth interface 115 through the sixth guide groove 225, and is connected to the third interface 112 through the twelfth guide groove 231; the fourth flow channel 213 is connected to the second interface 111 through the seventh guide groove 226, and is connected to the first interface 110 through the eighth guide groove 227; the sixth flow channel 215 is connected to the fourth interface 113 through the tenth guide groove 229, and is connected to the third interface 112 through the twelfth guide groove 231;

[0050] In the heating state, the seventh interface 116 is connected to the tenth interface 119 through the first guide groove 220, the first flow channel 210 is connected to the eighth interface 117 through the first guide groove 220, and is connected to the eleventh interface 120 through the fourth guide groove 223; the second flow channel 211 is connected to the ninth interface 118 through the third guide groove 222, and is connected to the third interface 112 through the eleventh guide groove 230; the third flow channel 212 is connected to the sixth interface 115 through the fifth guide groove 224, and is connected to the second interface 111 through the sixth guide groove 225; the fifth flow channel 214 is connected to the fourth interface 113 through the ninth guide groove 228, and is connected to the third interface 112 through the eleventh guide groove 230.

[0051] The labyrinth valve 10 provided in the embodiment of the present application is configured by arranging a plurality of connection ports on the valve body 100, arranging a plurality of flow channels inside the valve core 200, and arranging a plurality of guide grooves on the outer peripheral surface of the valve core 200; by switching the valve core 200 between the cooling state and the heating state, the guide grooves and the flow channels cooperate to connect different connection ports, thereby realizing the functions of the combination of multiple refrigerant valves, and by replacing the refrigerant pilot solenoid valve, the refrigerant three-way solenoid valve, the electronic expansion valve, the refrigerant one-way valve, etc., the cost of the vehicle thermal management system is reduced while improving the heat exchange efficiency, reducing energy consumption, and reducing the weight of the system.

[0052] In one embodiment of the present application, the valve core 200 is cylindrical, the cross section of the cavity is circular, and the valve core 200 can move in the valve body 100 along the length direction of the valve body 100.

[0053] In one embodiment of the present application, as shown in Figures 5 and 7 , the drive assembly 300 includes a solenoid valve 310 and a return spring 340. A first high-pressure chamber 320 is defined between the first end of the valve core 200 and the valve body 100, and a second high-pressure chamber 330 is defined between the second end of the valve core 200 and the valve body 100. The pressure within the twelfth guide groove 231 is lower than that in the first high-pressure chamber 320. The twelfth guide groove 231 is a low-pressure chamber, and the first high-pressure chamber 320 is connected to the twelfth guide groove 231 via the solenoid valve 310. Specifically, the valve body is provided with a connection port, through which the solenoid valve 310 and the twelfth guide groove 231 are connected. A seventh flow channel 216 is also provided inside the valve core 200. The first high-pressure chamber 320 is connected to the second high-pressure chamber 330 through the seventh flow channel 216. The seventh flow channel 216 is located on the central axis of the valve core 200. The seventh flow channel 216 extends along the length direction of the valve core 200. The seventh flow channel 216 forms a pressure balance hole at the connection with the first high-pressure chamber 320. The inner diameter of the pressure balance hole is smaller than the inner diameter of the seventh flow channel 216.

[0054] The return spring 340 is a compression spring, which is arranged in the first high-pressure chamber 320 . One end of the return spring 340 abuts against the inner wall of the first high-pressure chamber 320 , and the other end of the return spring 340 abuts against the end of the first end of the valve core 200 .

[0055] As shown in Figure 5, when the compressor is working, the high pressure of the refrigeration system begins to rise. Due to the presence of the pressure balance hole and the seventh flow channel 216, the pressure inside the first high-pressure chamber 320 and the second high-pressure chamber 330 rise synchronously. The pressure difference at both ends of the valve core 200 is zero. Due to the presence of the return spring 340, the valve core 200 is in a cooling state.

[0056] As shown in FIG7 , the solenoid valve 310 is an on-off valve connecting the first high-pressure chamber 320 and the low-pressure chamber. When the solenoid valve 310 is opened, the first high-pressure chamber 320 and the low-pressure chamber are connected, and the pressure in the first high-pressure chamber 320 drops rapidly, eventually becoming consistent with the pressure in the low-pressure chamber. Since the pressure balancing hole has a small aperture, the balancing hole can have a throttling effect, so the pressure in the second high-pressure chamber 330 will eventually become consistent with the pressure in the low-pressure chamber and remain stable. At this time, the pressure difference applied to the valve core 200 of the labyrinth valve 10 generates pressure, which causes the valve core 200 to move toward the first high-pressure chamber 320, that is, to the left in FIG7 . At this time, the return spring 340 is compressed, and the valve core 200 moves to the bottom end of the valve body 100, completing the circuit switching, and the valve core 200 is in the heating state.

[0057] In one embodiment of the present application, as shown in FIG5 , a first port is provided at the first end of the valve body 100, and a first plug 130 is provided at the first port. One end of a return spring 340 abuts against the first plug 130. Specifically, the first plug 130 is welded or threadedly connected to the first end of the valve body 100.

[0058] In one embodiment of the present application, as shown in FIG5 , a second port is provided at the second end of the valve body 100, and a second plug 131 is provided at the second port. The second high-pressure chamber 330 is located between the second end of the valve core 200 and the second plug 131. Specifically, the second plug 131 is welded or threadedly connected to the first end of the valve body 100.

[0059] In one embodiment of the present application, the first plug 130 and the second plug 131 are respectively sealed with the inner wall of the cavity through a first sealing ring. Specifically, the outer peripheral surface of the first plug 130 and the outer peripheral surface of the second plug 131 are both provided with an annular groove, and the first sealing ring is disposed in the annular groove.

[0060] In one embodiment of the present application, as shown in Figures 5 and 6, two adjacent guide grooves are separated by a partition plate. Since the width of each guide groove is different, the thickness of different partition plates is not the same. A groove is provided on the outer peripheral surface of each partition plate, and a second sealing ring 132 is provided in the groove to seal with the inner wall of the cavity. The second sealing ring 132 is fitted with the inner wall of the valve body 100 to achieve sealing between the partition plate and the inner wall of the valve body 100.

[0061] In one embodiment of the present application, as shown in Figure 6 , the distance between the outer circumference of the partition plate and the inner wall of the cavity is 0.01mm-0.025mm. Because refrigeration oil is present in the refrigeration system, controlling the gap between the outer circumference of the partition plate and the inner wall of the cavity to 0.01mm-0.025mm creates a sealing effect due to the oil film within the gap. This sealing effect can be further enhanced by adding an O-ring.

[0062] In one embodiment of the present application, the inner diameters of the second flow channel 211, the third flow channel 212, the fifth flow channel 214, and the sixth flow channel 215 are all larger than the inner diameters of the first flow channel 210 and the fourth flow channel 213. The second flow channel 211, the third flow channel 212, the fifth flow channel 214, and the sixth flow channel 215 are low-pressure flow channels, and to reduce flow resistance, the pipe diameters need to be as large as possible. The first flow channel 210 and the fourth flow channel 213 are high-pressure flow channels, and the pipe diameters can be as small as 10 mm.

[0063] The present application also provides a vehicle thermal management system, as shown in Figures 8 and 10, the vehicle thermal management system includes an in-vehicle expansion valve, at least one in-vehicle evaporator, an in-vehicle condenser, an out-vehicle heat exchanger, a vehicle drive system, a battery, a water pump, a compressor, a battery cooling expansion valve and the labyrinth valve 10 described in any one of the above embodiments.

[0064] The compressor is connected in series between the third interface 112 and the tenth interface 119, and the in-vehicle condenser is connected in series between the eighth interface 117 and the seventh interface 116; the first connection port of the in-vehicle evaporator is connected to the fourth interface 113, and the in-vehicle expansion valve is connected in series between the second connection port of the in-vehicle evaporator and the second interface 111; the first connection port of the external heat exchanger is connected to the ninth interface 118, and the second connection port of the external heat exchanger is connected to the first interface 110; the vehicle drive system is connected in series between the third connection port of the external heat exchanger and the first connection port of the water pump, and the fourth connection port of the external heat exchanger is connected to the second connection port of the water pump; the battery is connected in series between the third connection port of the water pump and the first connection port of the battery cooling expansion valve, the fourth connection port of the water pump is connected to the second connection port of the battery cooling expansion valve, the third connection port of the battery cooling expansion valve is connected to the first interface 110, and the fourth connection port of the battery cooling expansion valve is connected to the sixth interface 115 and the eleventh interface 120.

[0065] As shown in Figure 9, in the cooling state, the high-temperature and high-pressure medium output by the compressor enters the first guide groove 220 through the tenth interface 119, and the medium is divided into two paths. The first path of medium enters the first flow channel 210, and the second path of medium enters the vehicle condenser through the seventh interface 116, and then enters the first flow channel 210 through the eighth interface 117 and the second guide groove 221 in turn. After the two paths of medium are mixed in the first flow channel 210, they pass through the fourth guide groove 223 and the ninth interface 118 in turn to enter the vehicle external heat exchanger. After heat exchange with the outside air through the vehicle external heat exchanger, the medium is divided into two paths again. After the first path of medium passes through the battery cooling expansion valve, the first medium is divided into two paths. One path of medium enters the third flow channel 212 through the eleventh interface 120 and the fifth guide groove 224, and the other path of medium enters the third flow channel 212 through the sixth guide groove 225 and the sixth interface 115. After the two media are mixed in the third flow channel 212, they return to the compressor through the twelfth guide groove 231 and the third interface 112. The second medium enters the fourth flow channel 213 through the first interface 110 and the eighth guide groove 227, and then enters the vehicle expansion valve through the seventh guide groove 226 and the second interface 111. After being output from the vehicle expansion valve, the medium passes through different vehicle evaporators and enters the fourth interface 113, then enters the sixth flow channel 215 through the tenth guide groove 229, and finally returns to the compressor through the twelfth guide groove 231 and the third interface 112.

[0066] In the refrigeration circuit mode, functions such as cabin cooling, battery cooling, simultaneous cabin and battery cooling, and cabin heating and battery cooling can be achieved. By adjusting the opening of the internal expansion valve and the battery cooling expansion valve, cabin cooling, battery cooling, and simultaneous cooling can be achieved. By setting the air conditioning unit's temperature damper to full heat, cabin heating and battery cooling can be achieved.

[0067] As shown in Figure 11, in the heating state, the high-temperature and high-pressure medium output by the compressor enters the vehicle condenser through the tenth interface 119, the first guide groove 220 and the seventh interface 116 in sequence. After outputting heat in the condenser, the medium enters the first flow channel 210 through the eighth interface 117 and the first guide groove 220 in sequence. After flowing out of the first flow channel 210, the medium flows out of the valve body through the fourth guide groove 223 and the eleventh interface 120 in sequence. At this time, the medium is divided into two paths. The first path of medium enters the battery cooling expansion valve and then enters the external heat exchanger for heat exchange. After heat exchange, the medium enters the second flow channel 211 through the ninth interface 118 and the third guide groove 222 in sequence, and then returns to the compressor through the twelfth guide groove 231 and the third interface 112 in sequence. The second medium enters the third flow channel 212 through the sixth interface 115 and the fifth guide groove 224 in sequence, and then enters the in-vehicle expansion valve through the sixth guide groove 225 and the second interface 111 in sequence. After being output from the in-vehicle expansion valve, the medium enters the fourth interface 113 through different in-vehicle evaporators, and then enters the fifth flow channel 214 through the ninth guide groove 228, and finally returns to the compressor through the twelfth guide groove 231 and the third interface 112 in sequence.

[0068] In the heating circuit state, the functions of passenger compartment heating, battery heating, synchronous heating of passenger compartment and battery, passenger compartment cooling and battery heating, etc. can be realized; by adjusting the temperature damper of the air-conditioning box, the battery circulation circuit water pump, and the opening of the expansion valve in the vehicle, the functions of passenger compartment heating, battery heating, passenger compartment evaporator dehumidification and external heat absorption can be realized; by adjusting the temperature damper of the air-conditioning box to full cold, the passenger compartment cooling and battery heating functions can be realized.

[0069] The present application also provides a new energy vehicle, which includes a new energy vehicle body and the labyrinth valve described in any one of the above embodiments.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A labyrinth valve, comprising: A valve body having a cavity therein; an outer wall of the valve body is provided with a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface, a ninth interface, a tenth interface, and an eleventh interface, wherein the fourth interface is in communication with the fifth interface; a valve core disposed in the cavity, wherein a first flow channel, a second flow channel, a third flow channel, a fourth flow channel, a fifth flow channel, and a sixth flow channel are disposed inside the valve core; and a first guide groove, a second guide groove, a third guide groove, a fourth guide groove, a fifth guide groove, a sixth guide groove, a seventh guide groove, an eighth guide groove, a ninth guide groove, a tenth guide groove, an eleventh guide groove, and a twelfth guide groove are disposed on an outer circumferential surface of the valve core; wherein the first flow channel is communicated with the first guide groove, the second guide groove, and the fourth guide groove, respectively, the second flow channel is communicated with the third guide groove and the eleventh guide groove, the third flow channel is communicated with the fifth guide groove, the sixth guide groove, and the twelfth guide groove, the fourth flow channel is communicated with the seventh guide groove and the eighth guide groove, the fifth flow channel is communicated with the ninth guide groove and the eleventh guide groove, and the sixth flow channel is communicated with the tenth guide groove and the twelfth guide groove; A drive assembly connected to the valve core, the drive assembly being used to drive the valve core to switch between a cooling state and a heating state; In the cooling state, the first flow channel is connected to the seventh interface and the tenth interface through the first guide groove, is connected to the eighth interface through the second guide groove, and is connected to the ninth interface through the fourth guide groove; the third flow channel is connected to the eleventh interface through the fifth guide groove, is connected to the sixth interface through the sixth guide groove, and is connected to the third interface through the twelfth guide groove; the fourth flow channel is connected to the second interface through the seventh guide groove, and is connected to the first interface through the eighth guide groove; the sixth flow channel is connected to the fourth interface through the tenth guide groove, and is connected to the third interface through the twelfth guide groove; In the heating state, the seventh interface is connected to the tenth interface through the first guide groove, the first flow channel is connected to the eighth interface through the first guide groove, and is connected to the eleventh interface through the fourth guide groove; the second flow channel is connected to the third guide groove. The flow channel is connected to the ninth interface and is connected to the third interface through the eleventh guide groove; the third flow channel is connected to the sixth interface through the fifth guide groove and is connected to the second interface through the sixth guide groove; the fifth flow channel is connected to the fourth interface through the ninth guide groove and is connected to the third interface through the eleventh guide groove.

2. The labyrinth valve according to claim 1, wherein The drive assembly includes: A solenoid valve, wherein a first high-pressure chamber is defined between the end of the first end of the valve core and the valve body, and a second high-pressure chamber is defined between the end of the second end of the valve core and the valve body; the first high-pressure chamber is communicated with the twelfth flow guide groove via the solenoid valve; a seventh flow channel is further provided within the valve core, and the first high-pressure chamber is communicated with the second high-pressure chamber via the seventh flow channel; A return spring is provided in the first high-pressure chamber, one end of the return spring abuts against the inner wall of the first high-pressure chamber, and the other end of the return spring abuts against the end of the first end of the valve core.

3. The labyrinth valve according to claim 2, wherein: A first port is provided at the end of the first end of the valve body, a first plug is provided at the first port, and one end of the return spring abuts against the first plug.

4. The labyrinth valve according to claim 3, wherein The end of the second end of the valve body is provided with a second port, the second port is provided with a second plug, and the second high-pressure chamber is located between the end of the second end of the valve core and the second plug.

5. The labyrinth valve according to claim 4, wherein The first plug and the second plug are respectively sealed with the inner wall of the cavity through a first sealing ring.

6. The labyrinth valve according to any one of claims 1 to 4, wherein: Two adjacent guide grooves are separated by a partition plate, the outer peripheral surface of the partition plate is provided with a groove, and a second sealing ring is provided in the groove to seal with the inner wall of the cavity.

7. The labyrinth valve according to claim 5, wherein The distance between the outer peripheral surface of the partition plate and the inner wall of the cavity is 0.01 mm to 0.025 mm.

8. The labyrinth valve according to any one of claims 1 to 4, wherein: The inner diameters of the second flow channel, the third flow channel, the fifth flow channel, and the sixth flow channel are all larger than the inner diameters of the first flow channel and the fourth flow channel.

9. A vehicle thermal management system, comprising an in-vehicle expansion valve, at least one in-vehicle evaporator, an in-vehicle condenser, an out-vehicle heat exchanger, a vehicle drive system, a battery, a water pump, a compressor, a battery cooling expansion valve, and a labyrinth valve according to any one of claims 1 to 8; the compressor is connected in series between the third interface and the tenth interface, the in-vehicle condenser is connected in series between the eighth interface and the seventh interface; the first connection port of the in-vehicle evaporator is communicated with the fourth interface, the in-vehicle expansion valve is connected in series between the second connection port of the in-vehicle evaporator and the second interface; the first connection port of the out-vehicle heat exchanger is communicated with the ninth interface, the in-vehicle The second connection port of the external heat exchanger is communicated with the first interface, the vehicle drive system is connected in series to the third connection port of the external heat exchanger and the first connection port of the water pump, the fourth connection port of the external heat exchanger is communicated with the second connection port of the water pump, the battery is connected in series between the third connection port of the water pump and the first connection port of the battery cooling expansion valve, the fourth connection port of the water pump is communicated with the second connection port of the battery cooling expansion valve, the third connection port of the battery cooling expansion valve is communicated with the first interface, and the fourth connection port of the battery cooling expansion valve is communicated with the sixth interface and the eleventh interface.

10. A new energy vehicle, comprising a new energy vehicle body and the labyrinth valve according to any one of claims 1 to 8.

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