A valve device

Abstract

A valve device includes a base and a one-way valve core. The valve device has a first channel, a second channel, a valve chamber, and a drive chamber. At least a portion of the one-way valve core is movable within the first channel. The valve chamber and the drive chamber are located on opposite sides of the base. From the direction of the valve chamber to the drive chamber, the one-way valve core enables unidirectional communication between the valve chamber and the drive chamber. The second channel is connected to the drive chamber and the valve chamber. This arrangement is beneficial for allowing fluid to remain in the drive chamber for a longer period of time.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, specifically to a valve device for vehicles. Background Technology

[0002] Valve devices are used in thermal management technology to control fluid movement. In related technologies, valve devices have a channel, a valve chamber, and a drive chamber. One end of the channel is open and connected to the valve chamber, and the other end of the channel is open and connected to the drive chamber. The valve chamber allows fluid to pass through. Some fluid can flow from the valve chamber through the channel into the drive chamber, but will soon be discharged from the channel. Therefore, it is necessary to design a valve device that allows the fluid to stay in the drive chamber for a longer period of time. Summary of the Invention

[0003] The purpose of this application is to provide a valve device that facilitates the retention of fluid in the drive chamber for a longer period of time.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] A valve device includes a base and a one-way valve core. The valve device has a first channel, a second channel, a valve chamber, and a drive chamber. At least a portion of the one-way valve core is movable within the first channel. The valve chamber and the drive chamber are located on opposite sides of the base. In the direction from the valve chamber to the drive chamber, the one-way valve core enables unidirectional communication between the valve chamber and the drive chamber. The second channel is connected to the drive chamber, and the second channel is connected to the valve chamber.

[0006] In one technical solution provided in this application, the valve chamber points towards the drive chamber, and the one-way valve core enables unidirectional communication between the valve chamber and the drive chamber. The second channel is connected to both the drive chamber and the valve chamber. With this configuration, the first channel connects the valve chamber and the drive chamber, and the second channel connects both. Similarly, the second channel connects the valve chamber and the drive chamber. The flow area of ​​fluid entering the drive chamber from the valve chamber is greater than that of fluid entering the valve chamber from the drive chamber. Under the same conditions, the speed at which fluid enters the drive chamber from the valve chamber is greater than that of fluid entering the valve chamber from the drive chamber, which is beneficial for the fluid to remain in the drive chamber for a longer period of time. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural schematic diagram of the valve device provided in this application;

[0008] Figure 2 yes Figure 1 A schematic diagram of the cross-sectional structure along the AA direction;

[0009] Figure 3 yes Figure 2Enlarged structural diagram at point B (one-way valve core in the first state);

[0010] Figure 4 This is a schematic diagram of the one-way valve core in its first state;

[0011] Figure 5 This is a cross-sectional view of the valve stem with the one-way valve core located inside the valve stem.

[0012] Figure 6 yes Figure 2 A schematic diagram of the structure in the CC direction;

[0013] Figure 7 yes Figure 2 A schematic diagram of the structure in the DD direction;

[0014] Figure 8 yes Figure 7 Enlarged structural diagram at point E (first embodiment of the second port);

[0015] Figure 9 This is a schematic diagram of the second embodiment of the second port.

[0016] Figure label:

[0017] 1. Valve body; 2. Drive assembly; 3. Valve core assembly; 4. Valve stem; 5. Base; 6. Check valve core;

[0018] 10. Valve cavity; 11. First flow channel; 12. Second flow channel;

[0019] 20. Drive cavity; 21. Gear assembly;

[0020] 40. First channel; 41. Liquid storage tank; 46. Gap channel;

[0021] 50. Second channel; 51. First end wall; 52. Second end wall; 53. Mounting hole; 54. Protrusion;

[0022] 60. Valve core passage; 61. Sealing part; 62. Guide part; 63. Small diameter part;

[0023] 100. Valve device;

[0024] 400. Connecting channel; 401. First opening; 402. Second opening; 403. Receiving cavity; 404. Connecting cavity; 405. Stepped section; 410. Liquid storage port;

[0025] 501, the third bite; 502, the fourth bite. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] Combination Figures 1 to 9 As shown, this diagram illustrates one embodiment of the valve device 100. In this embodiment, the valve device 100 includes a valve body 1, a drive assembly 2, a valve core assembly 3, and a valve stem 4. The valve device 100 has a valve cavity 10 and a drive cavity 20. The valve body 1 has a first flow channel 11 and a second flow channel 12. The first flow channel 11 communicates with the valve cavity 10, and the second flow channel 12 communicates with the valve cavity 10. The drive assembly 2 can drive the valve core assembly 3 to rotate within the valve cavity 10, and the valve core assembly 3 can open and close the second flow channel 12. Specifically, the drive assembly 2 includes a gear assembly 21 located in the drive cavity 20. The gear assembly 21 communicates with the valve stem. 4. Limiting connection: Valve stem 4 is limitedly connected to valve core assembly 3. Gear assembly 21 can drive valve stem 4 to rotate, and valve core assembly 3 can rotate with valve stem 4. Valve device 100 also includes base 5, base 5 includes first end wall 51 and second end wall 52, wall forming drive cavity 20 includes first end wall 51, wall forming valve cavity 10 includes second end wall. Base 5 has mounting hole 53, valve stem 4 is rotatably connected to the wall forming mounting hole 53, one end of valve stem 4 is located in valve cavity 10, and the other end of valve stem 4 is located in drive cavity 20.

[0028] Combination Figures 1 to 6 As shown, the valve device 100 also includes a one-way valve core 6. The valve device 100 has a first channel 40 and a second channel 50. At least part of the one-way valve core 6 can move within the first channel 40. The first channel 40 includes a first port 401 and a second port 402. In the direction from the first port 401 to the second port 402, the one-way valve core 6 can enable one-way communication between the first port 401 and the second port 402. The second channel 50 has a third port 501 and a fourth port 502.

[0029] The valve chamber 10 and the drive chamber 20 are located on opposite sides of the base 5. The first port 401 communicates with the valve chamber 10, the second port 402 communicates with the drive chamber 20, the third port 501 communicates with the drive chamber 20, and the fourth port 502 communicates with the valve chamber 10. Specifically, the valve device 100 includes a first state and a second state. In the first state, the one-way valve core 6 abuts against the wall forming the first port 401, closing the first port 401. In the second state, the one-way valve core 6 separates from the wall forming the first port 401, and the first port 401 communicates with the second port 402. In this embodiment, one application scenario of the valve device 100 operating in a thermal management system is shown: the compressor inlet is connected to the second flow channel 12, the compressor outlet is connected to the first flow channel 11, and the valve core assembly 3 opens the second flow channel 12.

[0030] The second flow channel 12 is connected to the valve chamber 10. The compressor draws air from the valve chamber 10 through the second flow channel 12, thereby reducing the pressure inside the valve chamber 10 and the drive chamber 20. The one-way valve core 6 is in the first state. At the same time, the compressor introduces a relatively high-pressure refrigerant mixed with lubricating oil into the valve chamber 10. Under the action of the pressure difference, the refrigerant mixed with lubricating oil rushes into the valve chamber 10 and then flows through the first channel 40 and the second channel 50 into the drive chamber 20. During this process, the one-way valve core 6 separates from the wall forming the first port 401 under the thrust of the refrigerant mixed with lubricating oil. The first port 401 is connected to the second port 402 to allow the refrigerant mixed with lubricating oil to pass through. Of course, in other embodiments, the valve device 100 can also be applied to other working scenarios, and the separation of the one-way valve core 6 from the wall forming the first port 401 can also be achieved by mechanical control, current control, or magnetic field control, etc.

[0031] From the direction of the first port 401 to the second port 402, the one-way valve core 6 enables one-way communication between the first port 401 and the second port 402. With this configuration, from the direction of the valve chamber 10 to the direction of the drive chamber 20, the first channel 40 connects the valve chamber 10 and the drive chamber 20, and the second channel 50 connects the valve chamber 10 and the drive chamber 20. From the direction of the drive chamber 20 to the direction of the valve chamber 10, the second channel 50 connects the valve chamber 10 and the drive chamber 20. The flow area of ​​fluid from the valve chamber 10 to the drive chamber 20 is greater than the flow area of ​​fluid from the drive chamber 20 to the valve chamber 10. Under the same conditions, the speed of fluid from the valve chamber 10 to the drive chamber 20 is greater than the speed of fluid from the drive chamber 20 to the valve chamber 10. This is beneficial for the fluid to stay in the drive chamber 20 for a longer time, thereby fully lubricating the gear assembly 21.

[0032] Combination Figures 2 to 5 , Figure 7 and Figure 8 As shown, the valve device 100 includes a valve stem 4. Along the axial direction of the valve stem 4, the length of the valve stem 4 is greater than the thickness of the base 5. A first channel 40 is located on the valve stem 4, and the axis of the one-way valve core 6 is approximately parallel to the axis of the valve stem 4. With this arrangement, increasing the length of the valve stem 4 can increase the axial movement range of the one-way valve core 6. The one-way valve core 6 can be installed inside the first channel 40 without increasing the axial height of the valve device 100. On the one hand, the valve stem 4 with a larger axial length is easier to process, which helps to reduce the processing of the valve device 100. On the other hand, the valve stem 4 with a larger axial length can provide more room for the one-way valve core 6 to move, which helps to improve the compactness of the valve device 100.

[0033] Combination Figures 2 to 5 , Figure 7 and Figure 8As shown, the valve stem 4 also includes a liquid storage tank 41, which has a liquid storage port 410. The liquid storage port 410 is connected to the drive cavity 20. The first channel 40 includes a second port 402, which is located on the inner wall forming the liquid storage tank 41. The second port 402 is connected to the receiving cavity 403 and the liquid storage tank 41. Along the axial direction of the valve stem 4, the wall forming the liquid storage port 410 is spaced from the bottom wall forming the liquid storage tank 41. The wall forming the second port 402 is closer to the valve cavity 10 than the wall forming the liquid storage port 410. Specifically, along the axial direction of the valve stem 4, the wall forming the second port 402 is spaced from the bottom wall forming the liquid storage tank 41. The opening of the liquid storage port 410 faces the gear assembly 21.

[0034] Along the axial direction of the valve stem 4, the wall forming the liquid storage port 410 is spaced from the bottom wall forming the liquid storage tank 41. With this arrangement, after the cooling medium mixed with lubricating oil inside the drive chamber 20 is discharged, a portion of the cooling medium mixed with lubricating oil will remain in the liquid storage tank 41. On the one hand, during the operation of the valve device 100, when the valve device 100 experiences bumps or vibrations, the cooling medium mixed with lubricating oil remaining in the liquid storage tank 41 will be splashed into the drive chamber 20 under the shaking action of the valve device 100. When the gear assembly 21 is working, the cooling medium mixed with lubricating oil inside the drive chamber 20 may provide a certain degree of lubrication to the gear assembly 21. On the other hand, the wall forming the liquid storage tank 41 can guide the fluid entering from the second port 402, guiding the fluid from the liquid storage port 410 to flow into the drive chamber 20 in a designated direction.

[0035] The opening of the liquid storage port 410 faces the gear assembly 21; with this configuration, when the valve device 100 is bumped or vibrated during operation, the cold medium mixed with lubricating oil remaining in the liquid storage tank 41 will be directly sprayed onto the gear assembly 21, thereby directly lubricating the gear assembly 21.

[0036] Furthermore, in combination Figures 2 to 5 As shown, along the axial direction of the valve stem 4, the second port 402 is located on the side wall forming the liquid storage tank 41, and the wall forming the second port 402 is located between the bottom wall forming the liquid storage tank 41 and the wall forming the liquid storage port 410. Specifically, the orientation of the liquid storage port 410 is the same as the direction from the valve cavity 10 to the drive cavity 20. The fluid entering from the second port 402 flows through the liquid storage tank 41 and then enters the drive cavity 20 from the liquid storage port 410. The liquid storage port 410 is farther away from the valve cavity 10 than the second port 402.

[0037] Along the axial direction of the valve stem 4, the wall forming the second port 402 is located between the bottom wall forming the liquid storage tank 41 and the wall forming the liquid storage port 410. With this arrangement, when the fluid medium entering from the second port 402 and flowing through the liquid storage tank 41 enters the drive chamber 20, the fluid medium can reach a place farther away from the base 5, and thus the cold medium mixed with lubricating oil entering from the liquid storage port 410 can lubricate the gears farther away from the base 5.

[0038] Combination Figures 2 to 5 , Figures 7 to 9 As shown, the structure of the liquid storage tank 41 is an annular groove, at least part of the first channel 40 is located on the radial inner side of the liquid storage tank 41, and the second opening 402 is located on the inner annular sidewall forming the liquid storage tank 41.

[0039] Combination Figures 2 to 5 , Figure 7 and Figure 8 As shown, specifically in the first embodiment of the second port 402, the axis of the second port 402 is arranged along the radial line of the liquid storage tank 41; there are two second ports 402, and the cooling medium mixed with lubricating oil enters the liquid storage tank 41 from the second port 402, the liquid level of the fluid medium inside the liquid storage tank 41 rises, and the cooling medium mixed with lubricating oil is discharged axially from the liquid storage port 410. The cooling medium mixed with lubricating oil comes into contact with the gear assembly 21, which is beneficial for lubricating the gear assembly 21.

[0040] Combination Figures 2 to 5 as well as Figure 9 As shown, refer to Figure 7 and Figure 8 As shown, specifically in the second embodiment of the second port 402, the axis of the second port 402 is approximately perpendicular to the radial line of the liquid storage tank 41. The cooling medium mixed with lubricating oil enters the liquid storage tank 41 from the second port 402, entering tangentially to the liquid storage tank 41. As the liquid level of the cooling medium mixed with lubricating oil inside the liquid storage tank 41 rises, the cooling medium mixed with lubricating oil is discharged from the liquid storage port 410. The cooling medium mixed with lubricating oil inside the liquid storage tank 41 flies out tangentially to the liquid storage tank 41 and splashes into the drive cavity 20. The contact area and contact probability between the cooling medium mixed with lubricating oil and the gear assembly 21 increase accordingly, which is beneficial to improving the lubrication probability and lubrication effect of the cooling medium mixed with lubricating oil on the gear assembly 21.

[0041] Combination Figures 2 to 4As shown, the base 5 includes a first end wall 51 and a protrusion 54. The wall forming the drive cavity 20 includes the first end wall 51 in the direction from the valve cavity 10 to the drive cavity 20. The protrusion 54 protrudes relative to the first end wall 51. The third port 501 is located in the protrusion 54. The wall forming the third port 501 has a distance from the first end wall 51. Specifically, the protrusion 54 is a cylinder. Along the axial direction of the protrusion 54, the third port 501 is located on the axial end wall of the protrusion 54 away from the first end wall 51.

[0042] The third port 501 is located on the protrusion 54. The wall forming the third port 501 is spaced from the first end wall 51. With this arrangement, when the cooling medium mixed with lubricating oil is discharged from the third port 501, some of the cooling medium mixed with lubricating oil will remain inside the drive cavity 20. During the operation of the valve device 100, when the valve device 100 is bumped or vibrated, the cooling medium mixed with lubricating oil remaining between the wall forming the third port 501 and the first end wall 51 may be splashed to the outside of the gear assembly 21 under the shaking action of the valve device 100. When the gear assembly 21 is working, the cooling medium mixed with lubricating oil inside the drive cavity 20 may have a certain degree of lubrication effect on the gear assembly 21.

[0043] Combination Figures 2 to 5 As shown, the one-way valve core 6 can open and close the first port 401, and the minimum flow area of ​​the second channel 50 is smaller than the area of ​​the first port 401; specifically, the minimum flow area of ​​the second channel 50 is the area of ​​the fourth port 502, and the area of ​​the fourth port 502 is smaller than the area of ​​the first port 401. The one-way valve core 6 includes a first state and a second state. In the first state, the one-way valve core 6 abuts against the wall forming the first port 401, and the one-way valve core 6 closes the first port 401; in the second state, the one-way valve core 6 is separated from the wall forming the first port 401, and the first port 401 is connected to the second port 402. The one-way valve core 6 can open and close the area of ​​the fourth port 502, which is smaller than the area of ​​the third port 501, and the area of ​​the fourth port 502 is smaller than the area of ​​the first port 401.

[0044] The minimum flow area of ​​the second channel 50 is smaller than that of the first port 401. With this configuration, when the liquid level of the fluid medium inside the drive chamber 20 exceeds the second port 402 and the third port 501, the fluid medium can only be discharged from the second channel 50 because the first channel 40 has a one-way valve core 6. At the same time that the fluid medium inside the drive chamber 20 is discharged from the second channel 50 to the valve chamber 10, the air inside the valve chamber 10 enters the drive chamber 20 from the second channel 50. The poor discharge of the fluid medium inside the drive chamber 20 is beneficial to increasing the residence time of the cold medium of the mixed oil lubricating oil inside the drive chamber 20, which is beneficial to the lubrication of the gear assembly 21.

[0045] Furthermore, in combination Figures 2 to 5As shown, the minimum flow area of ​​the second channel 50 is set according to the following requirements: when there is a fluid medium inside the drive chamber 20, and the fluid medium does not pass through the third port 501, the fluid medium inside the drive chamber 20 cannot be continuously discharged from the second channel 50 under the action of gravity; with this setting, the cold medium mixed with lubricating oil inside the drive chamber 20 cannot be discharged from the second channel 50 under natural conditions, which can effectively improve the lubrication of the gear assembly 21. When the compressor is working, the compressor draws air from the valve chamber 10 through the second flow channel 12, and the pressure inside the valve chamber 10 and the drive chamber 20 decreases accordingly. The one-way valve core 6 is in the first state, and the cold medium mixed with lubricating oil inside the drive chamber 20 is discharged from the second channel 50 under the action of the pressure difference between the drive chamber 20 and the valve chamber 10.

[0046] Combination Figures 2 to 5 As shown, the first channel 40 includes a receiving cavity 403 and a communicating cavity 404. The inner diameter of the receiving cavity 403 is larger than the inner diameter of the communicating cavity 404. A step portion 405 is formed between the wall of the receiving cavity 403 and the wall of the communicating cavity 404. The first opening 401 is located on the inner peripheral wall of the step portion 405.

[0047] The one-way valve core 6 includes a blocking part 61 and a guide part 62. The guide part 62 slides with the wall forming the receiving cavity 403. Specifically, the blocking part 61 is conical and points from the first port 401 to the second port 402. The radius of the blocking part 61 increases, and at least part of the outer diameter of the blocking part 61 is larger than the inner diameter of the first port 401. The receiving cavity 403 includes a connecting channel 400, one end of which is connected to the second port 402.

[0048] The one-way valve core 6 includes a first state and a second state. In the first state, the one-way valve core 6 abuts against the wall forming the first port 401, and the sealing part 61 closes the first port 401. In the second state, the one-way valve core 6 separates from the wall forming the first port 401, and the other end of the connecting channel 400 is connected to the first port 401.

[0049] A stepped portion 405 is provided between the wall forming the receiving cavity 403 and the wall forming the communicating cavity 404; this arrangement allows the stepped portion 405 to limit the one-way valve core 6, which helps to prevent the one-way valve core 6 from coming out of the first channel 40.

[0050] The guide portion 62 slides into the wall forming the receiving cavity 403; with this arrangement, the sealing portion 61 is separated from the guide portion 62, and the wear between the guide portion 62 and the wall forming the receiving cavity 403 will not affect the sealing portion 61's sealing of the first port 401, which is conducive to ensuring the stable operation of the one-way valve core 6.

[0051] It is worth noting that the connecting channel 400 is formed when the one-way valve core 6 is in the second state. Specifically, the connecting channel 400 includes the distance between the outer wall of the guide portion 62 and the wall forming the receiving cavity 403, the distance between the blocking portion 61 and the wall forming the receiving cavity 403, and the distance between the blocking portion 61 and the wall forming the first opening 401.

[0052] In a specific application scenario, the one-way valve core 6 is in the first state, and the pressure inside the valve chamber 10 is greater than the pressure inside the drive chamber 20. Under the action of the pressure difference between the valve chamber 10 and the drive chamber 20, the one-way valve core 6 moves to the second port 402, and the one-way valve core 6 separates from the first port 401. The one-way valve core 6 then switches to the second state.

[0053] Furthermore, in combination Figures 2 to 5 As shown, the one-way valve core 6 includes a small-diameter portion 63. Along the axial direction of the one-way valve core 6, one end of the small-diameter portion 63 is connected to the sealing portion 61, and the other end of the small-diameter portion 63 is connected to the guide portion 62. The one-way valve core 6 is in a second state. There is a gap channel 46 between the outer wall of the small-diameter portion 63 and the wall forming the receiving cavity 403. The one-way valve core 6 has a valve core channel 60. The valve core channel 60 has an axial opening and a radial opening. The axial opening of the valve core channel 60 is located at one axial end of the guide portion 62. The axial opening of the valve core channel 60 communicates with the drive cavity 20. The one-way valve core 6 is in a second state. The radial opening of the valve core channel 60 is located on the outer wall of the small-diameter portion 63. The radial opening of the valve core channel 60 communicates with the gap channel 46. The connecting channel 400 includes the gap channel 46 and the valve core channel 60.

[0054] The axial opening of the valve core channel 60 is located at one axial end of the guide portion 62, the one-way valve core 6 is in the second state, the radial opening of the valve core channel 60 is located on the outer wall of the small diameter portion 63, and the radial opening of the valve core channel 60 is connected to the gap channel 46; with this arrangement, most of the flow area of ​​the connecting channel 400 is the valve core channel 60, which can reduce the impact of the gap between the guide portion 62 and the wall forming the receiving cavity 403 on the flow area of ​​the connecting channel 400, and is conducive to maintaining the stability of the flow area of ​​the connecting channel 400.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this description.

[0056] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described 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 the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A valve device, characterized in that, The valve device (100) includes a base (5) and a one-way valve core (6). The valve device (100) has a first channel (40), a second channel (50), a valve chamber (10), and a drive chamber (20). At least a portion of the one-way valve core (6) is movable within the first channel (40). The valve chamber (10) and the drive chamber (20) are located on opposite sides of the base (5). From the direction of the valve chamber (10) toward the drive chamber (20), the one-way valve core (6) enables one-way communication between the valve chamber (10) and the drive chamber (20). The second channel (50) is connected to the drive chamber (20) and the valve chamber (10).

2. The valve device according to claim 1, characterized in that, The first channel (40) includes a receiving cavity (403) and a communicating cavity (404). The inner diameter of the receiving cavity (403) is larger than the inner diameter of the communicating cavity (404). At least a portion of the one-way valve core (6) is located in the receiving cavity (403). A step portion (405) is formed between the wall of the receiving cavity (403) and the wall of the communicating cavity (404). The inner peripheral wall of the step portion (405) has a first opening (401). The one-way valve core (6) includes a first state and a second state. In the first state, the one-way valve core (6) abuts against the wall forming the first port (401) and closes the first port (401). In the second state, the one-way valve core (6) is separated from the wall forming the first port (401), and the first port (401) is connected to the valve cavity (10) and the drive cavity (20).

3. The valve device according to claim 2, characterized in that, The one-way valve core (6) includes a blocking part (61) and a guide part (62). The guide part (62) slides in cooperation with the wall forming the receiving cavity (403). At least part of the outer diameter of the blocking part (61) is larger than the inner diameter of the first port (401). The one-way valve core (6) includes a first state and a second state. In the first state, the one-way valve core (6) abuts against the wall forming the first port (401) and the sealing part (61) closes the first port (401). In the second state, the one-way valve core (6) is separated from the wall forming the first port (401). The receiving cavity (403) includes a connecting channel (400). One end of the connecting channel (400) is connected to the driving cavity (20), and the other end of the connecting channel (400) is connected to the first port (401).

4. The valve device according to claim 3, characterized in that, The one-way valve core (6) includes a small-diameter portion (63). Along the axial direction of the one-way valve core (6), one end of the small-diameter portion (63) is fixed, limited, or integrally connected with the sealing portion (61). The other end of the small-diameter portion (63) is fixed, limited, or integrally connected with the guide portion (62). The one-way valve core (6) is in a second state. There is a gap channel (46) between the outer wall of the small-diameter portion (63) and the wall forming the receiving cavity (403). The one-way valve core (6) has a valve core channel (60), which has an axial opening and a radial opening. The axial opening of the valve core channel (60) is located at one axial end of the guide portion (62), and the axial opening of the valve core channel (60) is connected to the drive cavity (20). The radial opening of the valve core channel (60) is located on the outer wall of the small diameter portion (63), and the radial opening of the valve core channel (60) is connected to the gap channel (46). The communication channel (400) includes the gap channel (46) and the valve core channel (60).

5. The valve device according to any one of claims 2-4, characterized in that, The valve device (100) includes a valve stem (4) along the axial direction of the valve stem (4), the length of the valve stem (4) being greater than the thickness of the base (5), the first channel (40) being located on the valve stem (4), and the axis of the one-way valve core (6) being approximately parallel to the axis of the valve stem (4).

6. The valve device according to claim 5, characterized in that, The valve stem (4) also includes a liquid storage tank (41), which has a liquid storage port (410) and is connected to the drive chamber (20). The first channel (40) includes a second port (402), which is located on the inner wall forming the liquid storage tank (41). The second port (402) communicates with the receiving cavity (403) and the liquid storage tank (41). Along the axial direction of the valve stem (4), the wall forming the liquid storage port (410) is spaced from the bottom wall forming the liquid storage tank (41). The wall forming the second port (402) is closer to the valve cavity (10) than the wall forming the liquid storage port (410).

7. The valve device according to claim 6, characterized in that, Along the axial direction of the valve stem (4), the second port (402) is located on the side wall forming the liquid storage tank (41), and the wall forming the second port (402) is located between the bottom wall forming the liquid storage tank (41) and the wall forming the liquid storage port (410).

8. The valve device according to claim 3 or 4, characterized in that, The structure of the liquid storage tank (41) is an annular groove. At least part of the first channel (40) is located on the radial inner side of the liquid storage tank (41), and the second opening (402) is located on the inner annular sidewall forming the liquid storage tank (41). The axis of the second opening (402) is approximately perpendicular to the radial line of the liquid storage tank (41).

9. The valve device according to any one of claims 2-8, characterized in that, The one-way valve core (6) can open and close the first port (401), and the minimum flow area of ​​the second channel (50) is smaller than the area of ​​the first port (401).

10. The valve device according to any one of claims 1-8, characterized in that, The base (5) includes a first end wall (51) and a protrusion (54). The wall forming the drive cavity (20) includes the first end wall (51). In the direction from the valve cavity (10) to the drive cavity (20), the protrusion (54) protrudes relative to the first end wall (51). The second channel (50) has a third opening (501) located in the protrusion (54) in the direction from the valve cavity (10) to the drive cavity (20), and the wall forming the third opening (501) is spaced from the first end wall (51).

Images