Valve device

Abstract

A valve device comprises a valve body assembly and a valve core, the valve body assembly has a first flow channel, a second flow channel and a third flow channel, the first flow channel can be selectively communicated with the second flow channel or the third flow channel through the valve core, the valve core comprises a straight flow channel, a first throttling groove and a second throttling groove, the first throttling groove and the second throttling groove are located on both sides of the central axis of the first opening of the straight flow channel, and the first throttling groove and the second throttling groove are not directly communicated with the straight flow channel, so that when the valve device switches the throttling between the second flow channel and the third flow channel, the short transition stage of the straight flow channel directly communicated with the second flow channel or the third flow channel is avoided, the flow stability of the valve device is improved, and meanwhile, the time for the valve device to switch the throttling between the second flow channel and the third flow channel is shortened through the two throttling grooves.

Description

TECHNICAL FIELD

[0001] The present application relates to a valve device. BACKGROUND

[0002] When the valve device is applied to a vehicle thermal management system, according to different system requirements, it is often used for switching or throttling of fluid. The inventor knows that the valve core of the valve device has a structure of setting a straight-through hole and a single throttling groove. When the fluid is switched between different flow channels, a certain flow channel will have a short transition stage of straight-through with the straight-through hole with the rotation of the valve core, which will cause poor flow stability of the valve device, and the switching time of the valve device is relatively long. SUMMARY

[0003] The purpose of the present application is to provide a valve device that can improve the flow stability of the valve device and shorten the throttling switching time of the valve device.

[0004] To achieve the above purpose, the present application adopts the following technical scheme:

[0005] A valve device includes a valve body assembly and a valve core. The valve body assembly has a first flow channel, a second flow channel, and a third flow channel. The valve core can connect the first flow channel and the second flow channel or the valve core can connect the first flow channel and the third flow channel. The valve core includes a straight-through hole, a first throttling groove, and a second throttling groove. The straight-through hole has a first opening. The first throttling groove and the second throttling groove are located on both sides of the central axis of the first opening, which is defined in the direction perpendicular to the first opening. The first throttling groove is not directly connected to the straight-through hole, and the second throttling groove is not directly connected to the straight-through hole.

[0006] The valve device of the present application includes a valve body assembly and a valve core. The valve body assembly has a first flow channel, a second flow channel, and a third flow channel. The first flow channel can be selectively connected to the second flow channel or the third flow channel through the valve core. The valve core includes a straight-through hole, a first throttling groove, and a second throttling groove. The first throttling groove and the second throttling groove are located on both sides of the central axis of the first opening of the straight-through hole. The first throttling groove and the second throttling groove are not directly connected to the straight-through hole. When the valve device switches between the second flow channel and the third flow channel, a certain way of rotation can avoid the short transition stage of the straight-through hole directly connected to the second flow channel or the third flow channel, which is beneficial to improve the flow stability of the valve device. At the same time, by setting two throttling grooves, the throttling switching time of the valve device between the second flow channel and the third flow channel is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a cross-sectional structure schematic diagram of one embodiment of the valve device;

[0008] Figure 2 yes Figure 1 A cross-sectional structural diagram of the valve body assembly;

[0009] Figure 3 yes Figure 1 Exploded view of the transmission mechanism;

[0010] Figure 4 yes Figure 1 A three-dimensional structural diagram of the valve core seat;

[0011] Figure 5 yes Figure 1 A three-dimensional structural diagram of the valve core;

[0012] Figure 6 yes Figure 1 A schematic diagram of a cross-sectional structure of the valve core;

[0013] Figure 7 This is a front view structural diagram of the valve device;

[0014] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure along the middle AA;

[0015] Figure 9 This is a cross-sectional structural diagram of the valve device in the closed state.

[0016] Figure 10 This is a cross-sectional structural diagram of the valve device and the throttling state of the third flow channel;

[0017] Figure 11 This is a cross-sectional structural diagram of the valve device and the second flow channel in a throttling state.

[0018] Figure 12 This is another cross-sectional structural diagram of the valve device in the closed state.

Detailed Implementation Methods

[0019] The present application will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] See Figure 1The valve device can be applied to vehicle thermal management systems or air conditioning systems, including thermal management systems for new energy vehicles. The valve device 100 includes a drive mechanism 1, a transmission mechanism 2, a valve body assembly 3, a valve stem 4, and a valve core 5. The valve body assembly 3 has a first valve body cavity 31 and a second valve body cavity 32. The transmission mechanism 2 is located in the first valve body cavity 31, and the valve core 5 is located in the second valve body cavity 32. The drive mechanism 1 is connected to the valve body assembly 3 and is drively connected to the transmission mechanism 2. The transmission mechanism 2 is drively connected to one end of the valve stem 4, and the other end of the valve stem 4 is drively connected to the valve core 5. The drive mechanism 1 outputs a torque to the transmission mechanism 2, which then increases the torque output by the drive mechanism 1 and transmits it to the valve stem 4, causing the valve stem 4 to rotate the valve core 5. In this embodiment, the transmission mechanism 2 is a planetary gear reduction mechanism; however, in other embodiments, the transmission mechanism 2 can also be other gear reduction mechanisms. It should be noted that when the output torque of the drive mechanism 1 is sufficient, the valve device 100 may not include the transmission mechanism 2; or the drive mechanism 1 and the transmission mechanism 2 may be integrated into one piece. For example, the valve device 100 includes a control device, which includes the drive mechanism 1 and the transmission mechanism 2. The control device is connected to the valve stem 4 through the transmission mechanism 2. By integrating the drive mechanism 1 and the transmission mechanism 2, the valve body assembly 3 may not include the first valve body cavity 31 that accommodates the transmission mechanism 2, which helps to reduce the axial height of the valve device 100.

[0021] See Figure 1 The drive mechanism 1 includes a housing 11, a motor assembly 12, a sleeve 13, and a connecting seat 14. The motor assembly 12 includes a coil winding 121, a rotor 122, and a motor shaft 123. The housing 11 is integrally injection molded with the coil winding 121 as an injection-molded insert. The coil winding 121 is located on the outer periphery of the rotor 122. The rotor 122 is fixedly connected to the motor shaft 123. The coil winding 121 and the rotor 122 are separated by the sleeve 13, which is fixedly connected to the connecting seat 14. In this embodiment, the sleeve 13 and the connecting seat 14 are fixed by welding. The sleeve 13 separates the coil winding 121 and the rotor 122, which helps to prevent fluid located at the rotor 122 from contacting the coil winding 121, thus ensuring the safety of the coil winding 121. The drive mechanism 1 also includes an interface 15, which can be integrally injection molded or assembled with the housing 11. The drive mechanism 1 is electrically and / or signal connected to the outside world through the interface 15.

[0022] See Figure 1The drive mechanism 1 is connected to the valve body assembly 3. Specifically, the drive mechanism 1 also includes a pressure plate 16. A portion of the pressure plate 16 is fixedly connected to the outer casing 11, and another portion of the pressure plate 16 is detachably connected to the valve body assembly 3 by screws. The valve body assembly 3 includes a gearbox 33 and a first valve body 34. The gearbox 33 and the first valve body 34 are fixedly connected. In this embodiment, the gearbox 33 and the first valve body 34 are fixed by welding, and the gearbox 33 and the first valve body 34 are assembled to form a first valve body cavity 31. See also Figure 2 The gearbox 33 includes a mounting portion 331, which forms a mounting cavity 332. With respect to the valve body assembly 3, the mounting cavity 332 communicates with the first valve body cavity 31. See also... Figure 1 and Figure 2 At least a portion of the connecting seat 14 is located in the mounting cavity 332. In this embodiment, the connecting seat 14 is fixed to the mounting portion 331 by pressing the connecting seat 14 between the pressing nut and the mounting portion 331. Of course, in other embodiments, the connecting seat 14 and the mounting portion 331 can also be fixed by welding, threaded connection, or adhesive. Furthermore, a sealing arrangement can be provided between the connecting seat 14 and the mounting portion 331 to prevent the working medium from leaking from the assembly gap between the connecting seat 14 and the mounting portion 331.

[0023] See Figures 1 to 3The transmission mechanism 2 is located in the first valve body cavity 31. The transmission mechanism 2 includes a sun gear 21, multiple planet gears 22, a first external gear ring 23, and a second external gear ring 24. In this embodiment, there are three planet gears 22, which are located on the outer periphery of the sun gear 21 and are distributed circumferentially around the sun gear 21. The sun gear 21 meshes with each planet gear 22. The transmission mechanism 2 has a gear cavity 25, which is mainly formed by assembling the first external gear ring 23 and the second external gear ring 24. At least a portion of the planet gears 22 and at least a portion of the sun gear 21 are located in the gear cavity 25. Both the first external gear ring 23 and the second external gear ring 24 have internal teeth. A portion of each planet gear 22 meshes with the first external gear ring 23, and another portion of each planet gear 22 meshes with the second external gear ring 24. The first external gear ring 23 is connected to the gearbox 33. In this embodiment, the first external gear ring 23 and the gearbox 33 are interference-fitted. Of course, in other embodiments, the first external gear ring 23 and the gearbox 33 can also be connected by a limiting connection to restrict the circumferential rotation of the first external gear ring 23. The second external gear ring 24 and the gearbox 33 are clearance-fitted. In this way, when the motor shaft 123 is connected to the sun gear 21, the rotation of the motor shaft 123 drives the sun gear 21 to rotate. The sun gear 21 meshes with the planet gears 22, and the rotation of the sun gear 21 drives the planet gears 22 to rotate. The planet gears 22 mesh with the first external gear ring 23 and the second external gear ring 24 respectively. The first external gear ring 23 is circumferentially fixed or limited to the gearbox 33. In this way, while the planet gears 22 rotate around themselves, they also rotate circumferentially around the sun gear 21 and can drive the second external gear ring 24 to rotate. The second external gear ring 24 is connected to one end of the valve stem 4, and the other end of the valve stem 4 is connected to the valve core 5. That is, the rotation of the second external gear ring 24 drives the valve stem 4 to rotate, and the rotation of the valve stem 4 ultimately drives the valve core 5 to rotate. In this embodiment, the valve core 5 is spherical or near-spherical. Of course, in other embodiments, the valve core 5 can also be other shapes.

[0024] See Figure 1 and Figure 4The valve body assembly 3 also includes a second valve body 35 and a valve core seat 36. The second valve body 35 is connected to the first valve body 34. In this embodiment, the second valve body 35 and the first valve body 34 are fixed by bolts. Furthermore, a sealing setting can be provided between the second valve body 35 and the first valve body 34 to prevent fluid from leaking from the assembly gap between the second valve body 35 and the first valve body 34. The second valve body 35 is assembled with the first valve body 34 to form a second valve body cavity 32. The valve core 5 is located in the second valve body cavity 32. There are two valve core seats 36, located on both sides of the valve core 5. Specifically, the valve core seats 36 are located in the groove formed by the first valve body 34 and the groove formed by the second valve body 35, respectively. The valve core seat 36 includes an arc-shaped surface 361 that mates with the outer surface of the valve core 5 and a connecting hole 362 that allows fluid to flow through. At least a portion of the arc-shaped surface 361 of the valve core seat 36 is fitted to the outer surface of the valve core 5. The valve core 5 and the valve core seat 36 can slide together, and the valve core seat 36 supports and seals the valve core 5. Furthermore, a sealing arrangement can be made between the valve core seat 36 and the first valve body 34 and / or between the valve core seat 36 and the second valve body 35, which helps to improve the overall sealing performance of the valve device 100.

[0025] See Figure 1 , Figure 5 and Figure 6 The valve core 5 includes a direct current channel 51, a first throttling groove 52, and a second throttling groove 53. The direct current channel 51 penetrates the valve core 5. In this embodiment, the direct current channel 51 is approximately "L"-shaped and has a first opening 511 and a second opening 512. Of course, in other embodiments, the direct current channel 51 can also have other shapes. The first throttling groove 52 and the second throttling groove 53 are recessed inward from the outer surface of the valve core 5. The first throttling groove 52 and the second throttling groove 53 are located on both sides of the central axis of the first opening 511 and are disposed away from the first opening 511. The first throttling groove 52 and the second throttling groove 53 can be symmetrically distributed relative to the first opening 511. Neither the first throttling groove 52 nor the second throttling groove 53 is directly connected to the direct current channel 51. See also Figure 5The first throttling groove 52 includes a first bottom wall 521 and a second bottom wall 522, which are connected to each other. Specifically, one end of the first bottom wall 521 extends to the outer surface of the valve core 5, and the other end of the first bottom wall 521 is connected to one end of the second bottom wall 522, which also extends to the outer surface of the valve core 5. In this embodiment, both the first bottom wall 521 and the second bottom wall 522 are arc surfaces. The arc surface of the first bottom wall 521 faces the same direction as the outer surface of the valve core 5, while the arc surface of the second bottom wall 522 faces the opposite direction. In other words, along the direction from the center of the valve core 5 to the outer surface, the first bottom wall 521 is a convex arc surface, and the second bottom wall 522 is a concave arc surface. Setting both the first bottom wall 521 and the second bottom wall 522 to be arc surfaces facilitates a smooth transition between them in the connected areas or at the intersections. Of course, as other embodiments, the first bottom wall 521 and / or the second bottom wall 522 can also be other shapes, such as a straight surface or a combination of a straight surface and an arc surface. The structure of the second throttling groove 53 is the same as that of the first throttling groove 52, and will not be described in detail here.

[0026] See Figure 1 , Figure 7 as well as Figure 8The first valve body 34 includes a first flow channel 341 and a second flow channel 342 for communicating with the outside world. The second valve body 35 includes a third flow channel 351 for communicating with the outside world. The first valve body 34 also includes a fourth flow channel 343 for internal communication. The second valve body 35 also includes a fifth flow channel 352 and a sixth flow channel 353 for internal communication. The fourth flow channel 343 is connected to the second flow channel 342, the fifth flow channel 352 is connected to the third flow channel 351, and the sixth flow channel 353 is connected to the third flow channel 351. The fifth flow channel 352 and the sixth flow channel 353 are not directly connected. The valve device 100 also includes a one-way valve component 6 and a gas-liquid separation component 7. The one-way valve component 6 is disposed in the fourth flow channel 343, and the sixth flow channel 353 can be unidirectionally connected to the fourth flow channel 343 through the one-way valve component 6. The gas-liquid separation component 7 is disposed in the third flow channel 351. Specifically, the gas-liquid separation component 7 includes an interface portion 71, a guide tube 72, and a baffle portion 73. The guide tube 72 is fixedly connected to the interface portion 71. In this embodiment, the guide tube 72 and the interface portion 71 are fixed by an interference fit. Of course, in other embodiments, the guide tube 72 and the interface portion 71 can also be connected by welding, adhesive, or threading. The connection can be fixed in various ways, or the guide tube 72 and the interface 71 can be integrally formed; the interface 71 is fixedly connected to the second valve body 35. In this embodiment, the interface 71 and the second valve body 35 are fixed by threads. Furthermore, a sealing setting is provided between the interface 71 and the second valve body 35, which helps to prevent fluid leakage from the assembly gap between the interface 71 and the second valve body 35; the partition 73 is fixedly connected to the second valve body 35. In this embodiment, the partition 73 is fixed by interference fit between its rod and the end countersunk hole of the third flow channel 351; the partition 73 and the guide tube 72 are spaced apart. The guide tube 72 includes a through hole 721, and the interface part 71 includes an interface channel 711. The through hole 721 connects the third flow channel 351 and the interface channel 711. The third flow channel 351 can communicate with the outside world through the through hole 721 and the interface channel 711. In addition, the third flow channel 351 can also communicate with the second flow channel 342 through the sixth flow channel 353, the one-way valve component 6, and the fourth flow channel 343, and communicate with the outside world through the second flow channel 342. A gas-liquid separation component 7 is provided to perform gas-liquid separation on the fluid located in the third flow channel 351. In this embodiment, the port of the first flow channel 341 is located on one side of the first valve body 34, the port of the second flow channel 342 is located on the other side of the first valve body 34, and the port of the third flow channel 351, or the port of the interface channel 711, is located on one side of the second valve body 35. The side where the port of the interface channel 711 of the second valve body 35 is located faces the same direction as the side where the port of the second flow channel 342 of the first valve body 34 is located. This is beneficial for the compact structure of the valve device 100 and for reducing the installation space when the valve device 100 is applied to the vehicle thermal management system.

[0027] See Figure 9This is the closed state of the valve device 100. At this time, the first flow channel 341 is not connected to the second flow channel 342 and the third flow channel 351. It should be noted that the opening length L of the first throttling groove 52 and the second throttling groove 53 (the first throttling groove 52 and the second throttling groove 53 have the same structure) can be set to be equal to or less than the center cross-sectional width D of the connecting hole 362 of the valve core seat 36. In this way, the first surface is defined and is perpendicular to the axis of the connecting hole 362. When the valve core 5 is rotated, in this embodiment, when the projection of the opening of the second throttling groove 53 on the first surface is completely coincident with the projection of the connecting hole 362 on the first surface, the first flow channel 341 cannot be connected to the third flow channel 351 through the second throttling groove 53. At the same time, the first flow channel 341 is not connected to the second flow channel 342. At this time, the valve device 100 is in the closed state.

[0028] See Figure 1 , Figure 8 as well as Figure 9 With the valve device 100 closed, rotating the valve core 5 clockwise allows the first flow channel 341 to connect with the second flow channel 342 through the direct current channel 51 of the valve core 5. At this time, the first flow channel 341 is not connected to the third flow channel 351. Specifically, in this embodiment, fluid flows from the first flow channel 341 into the direct current channel 51 through the second opening 512, and then into the second flow channel 342 through the first opening 511. Due to the reverse shut-off function of the one-way valve component 6, the fluid in the second flow channel 342 cannot flow to the sixth flow channel 353 through the one-way valve component 6. That is, the fluid in the second flow channel 342 flows out from the port of the second flow channel 342 and flows to the subsequent circuit. It should be noted that the clockwise direction mentioned here refers only to... Figure 8 and Figure 9 The example shown is used to define the direction, rather than restricting it to clockwise. The same applies to the counterclockwise direction described below, and will not be repeated here.

[0029] See Figure 9 and Figure 10When the valve device 100 is closed, by rotating the valve core 5 counterclockwise, when the projection of the opening of the second throttling groove 53 on the first surface coincides with the projection of the connecting hole 362 on the first surface, the first flow channel 341 can be connected to the third flow channel 351 through the second throttling groove 53. At this time, the first flow channel 341 and the second flow channel 342 are not connected. Specifically, in this embodiment, fluid enters the second valve body cavity 32 from the first flow channel 341 and / or from the first flow channel 341 through the direct current channel 51. The fluid in the second valve body cavity 32 is throttled and expanded by the second throttling groove 53 and then flows into the third flow channel 351 from the fifth flow channel 352. The throttled and expanded fluid flowing into the third flow channel 342 flows around the guide pipe 72 in an approximately spiral manner under the action of the gas-liquid separation component 7. The gas phase fluid is blocked by the baffle 73, flows into the through hole 721 of the guide pipe 72 and flows out from the interface channel 711 of the interface 71, flowing to the subsequent circuit. The liquid phase fluid flows from the sixth flow channel 353 to the fourth flow channel 343 under the unidirectional guidance of the one-way valve component 6, and flows out from the port of the second flow channel 342, flowing to the subsequent circuit.

[0030] See Figure 10 and Figure 11 Continuing to rotate the valve core 5 counterclockwise allows the first flow channel 341 to connect with the second flow channel 342 via the first throttling groove 52, while the first flow channel 341 is not connected to the third flow channel 351. Specifically, in this embodiment, fluid enters the second valve body cavity 32 from the first flow channel 341 and / or from the first flow channel 341 through the direct current channel 51. The fluid in the second valve body cavity 32 expands and flows into the second flow channel 342 after being throttled by the first throttling groove 52. Under the reverse cutoff of the one-way valve component 6, the expanded and throttled fluid flows out from the port of the second flow channel 342 and flows to the subsequent circuit.

[0031] See Figure 11 and Figure 12 Continue rotating the valve core 5 counterclockwise. When the projection of the opening of the first throttling groove 52 on the first surface completely coincides with the projection of the connecting hole 362 on the first surface, the first flow channel 341 cannot connect with the second flow channel 342 through the first throttling groove 52. At the same time, the first flow channel 341 is not connected with the third flow channel 351, and the valve device 100 is in the closed state.

[0032] In summary, by setting a double throttling groove on the valve core 5, compared with the structure of setting a single throttling groove on the valve core, when the valve device 100 switches between the second flow channel 342 and the third flow channel 351, the brief transition stage of the direct flow channel 51 being directly connected to the second flow channel 342 or the third flow channel 351 is avoided. This is beneficial to improving the flow stability of the valve device 100. At the same time, by setting two throttling grooves, the throttling switching time of the valve device between the second flow channel 342 and the third flow channel 351 is shortened.

[0033] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. For example, the directional definitions such as "front", "back", "left", "right", "up", and "down" are used. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. A valve device comprising a valve body assembly and a valve core, the valve body assembly having a first flow channel, a second flow channel, and a third flow channel, the valve core being capable of communicating with the first flow channel and the second flow channel, or the valve core being capable of communicating with the first flow channel and the third flow channel, characterized in that: The valve core includes a direct current channel, a first throttling groove, and a second throttling groove. The direct current channel has a first opening. The first and second throttling grooves are located on opposite sides of the central axis of the first opening, which is defined along a direction perpendicular to the first opening. The first and second throttling grooves are not directly connected to the direct current channel. The valve body assembly also includes a first and a second valve body. The first and second flow channels are located in the first valve body, and the third flow channel is located in the second valve body. The first valve body also includes a fourth flow channel. The second valve body further includes a fifth flow channel and a sixth flow channel. The fourth flow channel is connected to the second flow channel, the fifth flow channel is connected to the third flow channel, and the sixth flow channel is connected to the third flow channel, but the fifth flow channel and the sixth flow channel are not directly connected. The valve device further includes a one-way valve component and a gas-liquid separation component. The one-way valve component is located in the fourth flow channel, and the gas-liquid separation component is located in the third flow channel. The sixth flow channel can be unidirectionally connected to the fourth flow channel through the one-way valve component, and the gas-liquid separation component can perform gas-liquid separation on the fluid flowing into the third flow channel.

2. The valve device according to claim 1, characterized in that: The first throttling groove and the second throttling groove are recessed inward from the outer surface of the valve core. The first throttling groove and the second throttling groove are located away from the first opening and are symmetrically distributed with respect to the first opening.

3. The valve device according to claim 1 or 2, characterized in that: The first throttling groove includes a first bottom wall and a second bottom wall. One end of the first bottom wall extends to the outer surface of the valve core, and the other end of the first bottom wall is connected to one end of the second bottom wall. The other end of the second bottom wall extends to the outer surface of the valve core. The second throttling groove has the same structure as the first throttling groove.

4. The valve device according to claim 3, characterized in that: The valve core is spherical or near-spherical, and both the first bottom wall and the second bottom wall are arc surfaces. The arc surface of the first bottom wall faces the same direction as the outer surface of the valve core, and the arc surface of the second bottom wall faces the opposite direction to the outer surface of the valve core.

5. The valve device according to claim 4, characterized in that: The valve body assembly further includes a valve core seat located on both sides of the valve core, with at least a portion of the valve core seat fitting against the outer surface of the valve core. The valve core seat includes a connecting hole, and the opening length L of the first throttling groove is equal to or less than the center cross-sectional width D of the connecting hole.

6. The valve device according to claim 5, characterized in that: Define a first surface, which is perpendicular to the axis of the connecting hole. When the projection of the opening of the first throttling groove on the first surface completely coincides with the projection of the connecting hole on the first surface, the first flow channel is not connected to the first throttling groove.

7. The valve device according to claim 5, characterized in that: Define a first surface, which is perpendicular to the axis of the connecting hole. When the projection of the opening of the second throttling groove on the first surface completely coincides with the projection of the connecting hole on the first surface, the first flow channel and the second throttling groove are not connected.

8. The valve device according to any one of claims 1-2 and 4-7, characterized in that: The port of the first flow channel is located on one side of the first valve body, the port of the second flow channel is located on the other side of the first valve body, the port of the gas-liquid separation component is located on one side of the second valve body, and the side where the port of the gas-liquid separation component of the second valve body is located faces the same direction as the side where the port of the second flow channel of the first valve body is located.

9. The valve device according to claim 8, characterized in that: When the first flow channel is connected to the third flow channel through the first or second throttling groove, the fluid flows from the first flow channel through the first or second throttling groove after throttling and expansion, then flows through the fifth flow channel and into the third flow channel. Under the action of the gas-liquid separation component, the gas phase fluid flows out from the port of the gas-liquid separation component and flows to the subsequent loop; the liquid phase fluid flows from the sixth flow channel through the one-way valve component to the fourth flow channel, and then flows out from the port of the second flow channel and flows to the subsequent loop.

10. The valve device according to claim 3, characterized in that: The port of the first flow channel is located on one side of the first valve body, the port of the second flow channel is located on the other side of the first valve body, the port of the gas-liquid separation component is located on one side of the second valve body, and the side where the port of the gas-liquid separation component of the second valve body is located faces the same direction as the side where the port of the second flow channel of the first valve body is located.

11. The valve device according to claim 10, characterized in that: When the first flow channel is connected to the third flow channel through the first or second throttling groove, the fluid flows from the first flow channel through the first or second throttling groove after throttling and expansion, then flows through the fifth flow channel and into the third flow channel. Under the action of the gas-liquid separation component, the gas phase fluid flows out from the port of the gas-liquid separation component and flows to the subsequent loop; the liquid phase fluid flows from the sixth flow channel through the one-way valve component to the fourth flow channel, and then flows out from the port of the second flow channel and flows to the subsequent loop.

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