Valve device
By designing direct adjustment between the valve core and the valve port wall in the valve device, combined with the air box head and adjusting elastic element, the problem of reduced flow caused by the solenoid valve components is solved, achieving more efficient fluid flow and reducing processing difficulty.
Patent Information
- Application Number
- CN202422170145.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-06-25
- Filing Date
- 2024-09-04
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-09-04
AI Technical Summary
In existing valve devices, the presence of solenoid valve components reduces fluid flow rate and affects fluid circulation efficiency.
By designing a direct adjustment between the valve core and the valve port wall, combined with the combined action of the air box head and the adjusting elastic element, the distance between the valve core and the valve port wall can be adjusted to achieve flow rate regulation and valve closure, preventing fluid from passing through the passage of the solenoid valve components.
It increases fluid flow rate, simplifies processing, reduces costs, and provides a more direct fluid flow path, avoiding the additional throttling effect of solenoid valve components on flow rate.
Smart Images
Figure CN223524564U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fluid control technical field, concretely relates to a valve device for refrigerating system. BACKGROUND
[0002] The existing valve device integrates an electromagnetic valve component on the basis of an expansion valve, the expansion valve comprises a valve port and a valve core, the size of flow is adjusted by changing the distance between the valve core and the valve port, the electromagnetic valve component comprises a channel and a piston, the on-off of fluid is controlled by the movement of the piston and whether the piston abuts against the channel, therefore, when the valve device is in the open valve state, the fluid needs to pass through the channel defined by the valve port of the expansion valve and the channel of the electromagnetic valve component to realize the flow, and the channel of the electromagnetic valve component further depressurizes and throttles the fluid, thereby reducing the flow of the fluid of the valve device. SUMMARY
[0003] The utility model discloses a valve device, which can avoid reducing the flow of the fluid of the valve device.
[0004] The utility model discloses a technical scheme provides a valve device, including valve body, gas tank head, valve rod, valve core spare, dynamic core iron, adjusting elastic part, coil assembly, the gas tank head with valve body fixed connection, at least part valve rod, valve core spare is located in valve body, and valve rod one end with gas tank head abuts, the other end with valve core spare abuts, adjusting elastic part is located in the side of valve core spare away from valve rod, and adjusting elastic part with valve core spare abut, valve body has valve port wall, the gas tank head with adjusting elastic part jointly adjust the distance between valve core spare and valve port wall,
[0005] At least part dynamic core iron is covered to valve core spare outside, and dynamic core iron with valve core spare axial location abut, coil assembly is covered to dynamic core iron outside, coil assembly passes through electricity or power failure, dynamic core iron, valve core spare all move towards the direction of valve port wall, valve core spare with valve port wall abut.
[0006] According to the valve device provided in the technical scheme, the air tank head and the valve rod are located at one axial side of the valve core part, the air tank head and the valve rod abut against each other, the valve rod and the valve core part abut against each other, the adjusting elastic piece is located at the other axial side of the valve core part, and the adjusting elastic piece and the valve core part abut against each other, the adjusting elastic piece and the air tank head can jointly act on the valve core part, the distance between the valve core part and the valve port wall is adjusted, and thus the size of the flow is adjusted; in addition, the moving core iron and the valve core part axially abut against each other in position, the coil assembly is powered on or powered off, the moving core iron and the valve core part axially move, the valve core part can abut against the valve port wall, and thus the valve is closed, so in the technical scheme, the valve core part and the valve port wall can be used to adjust the size of the flow and close the valve, and when the valve device is in an open valve state, the fluid only needs to pass through the channel defined by the valve port wall to flow, and thus the flow of the fluid of the valve device can be reduced. BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 is a sectional structure schematic view of the valve device provided in the utility model;
[0008] Figure 2 is Figure 1 an enlarged structure schematic view of A in the utility model;
[0009] Figure 3 is Figure 1 a sectional structure schematic view of the valve body of the valve device in the utility model;
[0010] Figure 4 is Figure 1 a sectional structure schematic view of the sleeve, the valve core part, the static core iron, the moving core iron, the adjusting elastic piece, the adjusting seat, the plugging piece and the core iron elastic piece of the valve device in the utility model;
[0011] Figure 5 is Figure 1 a sectional structure schematic view of the sleeve of the valve device in the utility model;
[0012] Figure 6 is Figure 1 a structure schematic view of the valve core part of the valve device in the utility model;
[0013] Figure 7 is Figure 1 a sectional structure schematic view of the moving core iron of the valve device in the utility model.
[0014] 11, valve body; 111, valve port wall; 112, valve chamber; 113, inner wall; 114, mounting groove; 115, first passage; 116, second passage; 117, third passage; 118, fourth passage; 119, valve port passage; 12, sealing element; 13, air tank head; 131, air tank cover; 132, air tank seat; 133, diaphragm; 134, transmission element; 14, valve stem; 21, sleeve; 211, containing cavity; 212, containing cavity wall; 213, limiting portion; 22, valve core element; 221, abutting portion; 222, valve core portion; 23, static core iron; 24, dynamic core iron; 241, through hole; 242, mounting cavity; 243, mounting cavity wall; 25, adjusting elastic element; 26, adjusting seat; 27, plugging element; 28, core iron elastic element; 3, coil assembly. DETAILED DESCRIPTION
[0015] Features and exemplary embodiments of various aspects of the present application will be described below. In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described below in combination with the drawings and specific embodiments. In this article, relational terms such as "first" and "second" are only used to distinguish one component from another component having the same name, and do not necessarily require or imply any such actual relationship or order between the components.
[0016] Please refer to Figures 1 to 3 , the valve device comprises a valve body 11, a sealing element 12, an air tank head 13, and a valve stem 14.
[0017] The valve body 11 is provided with a valve chamber 112, a first passage 115, a second passage 116, and a valve port passage 119. The first passage 115 is in communication with the valve chamber 112. The valve port passage 119 is in communication with the valve chamber 112 at one end and in communication with the second passage 116 at the other end. The side wall of the opening of the valve port passage 119 in communication with the valve chamber 112 is the valve port wall 111.
[0018] The other side of the valve body 11 in the axial direction is provided with a third passage 117 and a fourth passage 118. The third passage 117 is in communication with the fourth passage 81.
[0019] The gas tank head 13 is fixed to one side of the valve body 11 provided with the third passage 117 and the fourth passage 118. Specifically, the gas tank head 13 comprises a gas tank cover 131, a gas tank seat 132, a diaphragm 133, and a transmission member 134. The gas tank seat 132 is fixed to the valve body 11, and the gas tank cover 131 is fixed to the gas tank seat 132, for example, by welding. The diaphragm 133 is located between the gas tank cover 131 and the gas tank seat 132, and separates the space between the gas tank cover 131 and the gas tank seat 132 into a closed chamber and an equalizing chamber. The closed chamber is located on the upper side of the diaphragm 133, i.e., between the diaphragm 133 and the gas tank cover 131, and the equalizing chamber is located on the lower side of the diaphragm 133. The closed chamber is filled with a temperature-sensitive medium. The equalizing chamber is in communication with the third passage 117 and the fourth passage 118. The transmission member 134 is located below the diaphragm 133, and the diaphragm 133 can apply a force to the transmission member 134. One end of the valve rod 14 is in abutment with the transmission member 134, so that the diaphragm 133 can drive the valve rod 14 to move axially through the transmission member 134, thereby controlling the flow rate of the refrigerant.
[0020] The first passage 115 can be in communication with the outlet of the condenser, the second passage 116 can be in communication with the inlet of the evaporator, the third passage 117 can be in communication with the outlet of the evaporator, and the fourth passage 118 can be in communication with the inlet of the compressor. Therefore, the specific working principle of the thermal expansion valve is as follows: the refrigerant flows out of the outlet of the condenser, flows into the evaporator through the first passage 115, the valve chamber 112, the valve port passage 119, and the second passage 116, exchanges heat in the evaporator, and part of the refrigerant after heat exchange directly enters the compressor through the third passage 117 and the fourth passage 118. Another part of the refrigerant after heat exchange enters the equalizing chamber through the third passage 117. The temperature-sensitive medium in the closed chamber drives the diaphragm 133 to move through the refrigerant. The diaphragm 133 drives the valve rod 14 to move axially through the transmission member 134, thereby controlling the flow rate of the refrigerant.
[0021] Please refer to Figures 4 to 7 , the valve device comprises a sleeve 21, a valve core member 22, a static core iron 23, a dynamic core iron 24, an adjusting elastic member 25, an adjusting seat 26, a plugging member 27, and a core iron elastic member 28.
[0022] The sleeve 21 is fixed to the valve body 11. Specifically, the outer side of the end of the sleeve 21 close to the valve body 11 can be provided with external threads, and the inner wall 113 can be provided with internal threads. The end of the sleeve 21 close to the valve body 11 can extend into the valve body 11, and the sleeve 21 and the inner wall 113 are threadedly connected. Of course, in other embodiments, the fixing manner of the sleeve 21 and the inner wall 113 is not limited to the above-mentioned case. For example, the sleeve 21 and the inner wall 113 can also be fixed by adhesion, clamping, or the like.
[0023] In order to limit the distance of the sleeve 21 extending into the valve body 11, a limiting part 213 is formed on the outer side of the sleeve 21, and the outer diameter of the limiting part 213 is larger than that of the sleeve 21. When the sleeve 21 is screwed with the inner wall 113, the limiting part 213 abuts against the axial end surface of the valve body 11, thereby preventing the sleeve 21 from continuing to extend into the valve chamber 112.
[0024] In order to enhance the sealing between the sleeve 21 and the valve body 11, and prevent refrigerant from escaping from the gap between the sleeve 21 and the valve body 11, an installation groove 114 is arranged on the axial end surface of the valve body 11, and the installation groove 114 extends along the edge of the valve chamber 112, and part of the sealing member 12 is arranged in the installation groove 114. When the sleeve 21 is fixed with the valve body 11, the limiting part 213 abuts against the sealing member 12, thereby achieving better sealing. The sealing member 12 can be preferably a sealing ring.
[0025] The sleeve 21 is hollow inside to form an accommodating cavity 211, and the end of the sleeve 21 away from the valve body 11 has an opening, and the accommodating cavity 211 communicates with the outside through the opening. Specifically, the static core iron 23 is fixedly installed in the accommodating cavity 211, and the static core iron 23 is preferably fixedly installed on the side of the accommodating cavity 211 close to the valve body 11. The dynamic core iron 24 is movably arranged in the accommodating cavity 211, and the dynamic core iron 24 is preferably movably arranged on the side of the accommodating cavity 211 away from the valve body 11. It should be noted that the movable arrangement means that the dynamic core iron 24 can move reciprocally along the axial direction.
[0026] In addition, a core iron elastic member 28 is arranged between the dynamic core iron 24 and the static core iron 23, one end of the core iron elastic member 28 abuts against the static core iron 23, and the other end abuts against the dynamic core iron 24. The core iron elastic member 28 can be compressed or released along the axial direction. The core iron elastic member 28 is preferably a spring.
[0027] In order to prevent the core iron elastic member 28 from moving non-axially, the static core iron 23 is provided with a groove on the side close to the dynamic core iron 24, one end of the core iron elastic member 28 extends into the groove and abuts against the bottom surface of the groove. The side wall of the groove can limit the non-axial movement of the core iron elastic member 28, thereby enhancing the stability of the installation of the core iron elastic member 28.
[0028] The dynamic core iron 24 has a through hole 241 and an installation cavity 242, and the installation cavity 242 is preferably located on the side of the through hole 241 away from the valve body 11, one end of the through hole 241 communicates with the installation cavity 242, and the other end communicates with the accommodating cavity 211.
[0029] The valve core member 22 is in a rod-like structure, and the valve core member 22 is spaced apart along the axial direction to form a valve core part 222 and an abutting part 221, and the valve core part 222 and the abutting part 221 can be an integral structure with the valve core member 22.
[0030] The valve core 22 is located in the installation cavity 242 at one end, and the abutting portion 221 is also located in the installation cavity 242. The other end of the valve core 22 can pass through the through hole 241, the static core 23, the sleeve 21, and extend into the valve chamber 112, and abut or be spaced apart from the valve port wall 111. The valve rod 14 abuts the valve core portion 222. In order to facilitate abutting with the valve port wall 111, the valve core portion 222 can be hemispherical, and when the valve core portion 222 abuts the valve port wall 111, the refrigerant passage is closed. In order to facilitate the valve core 22 passing through the static core 23 and the sleeve 21, a hole can be provided on the static core 23 and the sleeve 21 for the valve core 22 to pass through.
[0031] It is conceivable that in order to limit the non-axial movement of the valve core 22, the valve core 22 can be limited by the through hole 241. Specifically, on the basis of the machining precision of the existing device, without affecting the axial movement of the valve core 22, the distance between the valve core 22 and the inner wall of the through hole 241 can be reduced as much as possible.
[0032] The dynamic core 24 has an installation cavity wall 243, which at least forms part of the installation cavity 242, and more specifically, the installation cavity wall 243 includes a side wall arranged parallel to the axial direction and a bottom wall arranged perpendicular to the axial direction.
[0033] The outer diameter of the abutting portion 221 is greater than the diameter of the through hole 241. When the one end of the valve core 22 passes through the through hole 241, the abutting portion 221 can abut the installation cavity wall 243, and more specifically, the abutting portion 221 can abut the bottom wall, thereby limiting the movement of the valve core 22 towards the valve body 11.
[0034] It is conceivable that the abutting of the abutting portion 221 and the bottom wall can also limit the non-axial movement of the valve core 22, thereby enhancing the stability of the installation of the valve core 22.
[0035] The adjusting seat 26 is connected with the installation cavity wall 243, and more specifically, the adjusting seat 26 is threadedly connected with the side wall. It is conceivable that since the adjusting seat 26 is threadedly connected with the dynamic core 24, rotating the adjusting seat 26 can change the relative position between the adjusting seat 26 and the dynamic core 24. The adjusting elastic member 25 is arranged in the installation cavity 242, and one end of the adjusting elastic member 25 abuts the abutting portion 221, and the other end abuts the adjusting seat 26. Therefore, rotating the adjusting seat 26 changes the relative position between the adjusting seat 26 and the dynamic core 24, at this time, the compression amount of the adjusting elastic member 25 will also change, that is, rotating the adjusting seat 26 can adjust the compression amount of the adjusting elastic member 25, thereby changing the actuation value of the valve device. The adjusting elastic member 25 is preferably a spring.
[0036] In order to prevent the moving core iron 24, the adjusting elastic member 25, the adjusting seat 26, the core iron elastic member 28 and other components from being separated from the accommodating cavity 211, the blocking member 27 is fixed at the end of the sleeve 21 away from the valve body 11, and the blocking member 27 can abut against the adjusting seat 26. Specifically, the blocking member 27 can partially extend into the accommodating cavity 211, and the blocking member 27 is in sealing connection with the accommodating cavity wall 212.
[0037] The fixing mode of the blocking member 27 and the sleeve 21 is preferably welding, which is good in stability and sealing. Of course, in other embodiments, the fixing mode of the blocking member 27 and the sleeve 21 can also be bonding, clamping or the like.
[0038] The coil assembly 3 is arranged outside the sleeve 21, and the coil assembly 3 can be fixed with the valve body 11. The coil assembly 3 has a coil inside, and the coil surrounds the moving core iron 24 and the static core iron 23.
[0039] The valve device has a throttling mode and a cut-off mode.
[0040] When the valve device is in the throttling mode, the air tank head 13 and the adjusting elastic member 25 can jointly adjust the distance between the valve core member 22 and the valve port wall 111, and the valve core member 22 abuts against or is spaced apart from the valve port wall 111. Specifically, the adjusting seat 26 abuts against the blocking member 27, the valve core part 222 is arranged in spaced apart manner with the valve port wall 111, and the air tank head 13 and the adjusting elastic member 25 jointly act on the valve core member 22 to adjust the distance between the valve core part 222 and the valve port wall 111. It should be noted that the air tank head 13 acting on the valve core member 22 here means that the air tank head 13 can drive the valve core member 22 to move along the axial direction through the valve rod 14, rather than the air tank head 13 directly driving the valve core member 22 to move along the axial direction.
[0041] When the valve device is in the cut-off mode, the moving core iron 24 drives the valve core member 22 to approach or move away from the valve port wall 111, and the valve core member 22 abuts against or is spaced apart from the valve port wall 111. Specifically, the adjusting seat 26 is arranged in spaced apart manner with the blocking member 27, the abutting part 221 abuts against the inner wall of the moving core iron 24, and the valve core part 222 abuts against the valve port wall 111. It can be conceived that in the cut-off mode, since the valve core part 222 abuts against the valve port wall 111, the valve port passage 119 is not in communication with the valve chamber 112, that is, the refrigerant passage is in a closed state.
[0042] With the normally open valve device as an example, when the coil assembly 3 is switched from being powered to being powered off, the moving core iron 24 is axially moved away from the static core iron 23 under the elastic force of the core iron elastic member 28, and the moving core iron 24 drives the valve core member 22 to move away from the static core iron 23, the valve core member 22 is gap-set with the valve port wall 111, and the refrigerant in the valve chamber 112 can enter the valve port passage 119 through the gap between the valve core member 22 and the valve port wall 111, so as to realize the opening of the refrigerant passage, at this time, the valve device can be in a throttling mode. Similarly, when the coil assembly 3 is powered, the coil assembly 3 generates a magnetic field, and the moving core iron 24 is axially moved towards the static core iron 23 under the action of the magnetic field, thereby canceling the limiting action of the moving core iron, at this time, the valve core member 22 is moved towards the valve port wall 111 under the elastic force of the adjusting elastic member 25, until the valve core member 22 abuts against the end surface of the valve port wall 111, thereby realizing the closing of the refrigerant passage, at this time, the valve device is in a cut-off mode.
[0043] Of course, the valve device provided by the utility model can also be a normally closed valve device, at this time, the refrigerant passage is closed when not powered, and the refrigerant passage is opened when powered. The specific principle is similar to that of the normally open valve device described above, and will not be described here.
[0044] It should be clear that when the valve core part 222 abuts against the valve port wall 111, the diaphragm 133 is compressed away from the valve port wall 111, and the temperature-sensing medium in the closed chamber can also be compressed. Specifically, with the normally open valve device as an example, when the coil assembly 3 is switched from being powered off to being powered, the valve core member 22 moves towards the valve port wall 111 and eventually abuts against the valve port wall 111, in this process, since the valve core member 22 always abuts against the valve rod 14, the valve core member 22 will drive the valve rod 14 to move, the valve rod 14 presses the diaphragm 133 through the transmission member 134, so that the diaphragm 133 is compressed away from the valve port wall 111, and the compression of the diaphragm 133 away from the valve port wall 111 will make the space in the closed chamber smaller, so the temperature-sensing gas in the closed chamber will also be compressed. At this time, when the coil assembly 3 is switched from being powered to being powered off, the valve core member 22 moves away from the valve port wall 111, at this time, the valve rod 14 can also move away from the valve port wall 111 under the resetting action of the temperature-sensing gas and the diaphragm 133, so that the valve core member 22 and the valve rod 14 can always abut against each other.
[0045] It can be conceived that the valve device provided by the utility model, the refrigerant can enter the second passage 116 through the first passage 115, the valve chamber 112 and the valve port passage 119, the flow channel of the refrigerant is the same as that of the expansion valve without an electromagnetic valve, that is, the electromagnetic component does not throttle the refrigerant, thereby ensuring that the valve device has the desired refrigeration effect.
[0046] In addition, the existing expansion valve with a solenoid valve opens or closes the refrigerant passage by cooperation of a piston and a valve port of the solenoid valve, and has more components, and has a higher assembly precision requirement between components, in other words, the component needs to control the roughness of the processing position, thereby increasing the processing difficulty. The valve device provided by the application can open or close the refrigerant passage by cooperation of the valve core 22 and the valve port wall 111, has fewer components, and only needs to control the roughness of the valve core 22 and the valve port wall 111, thereby greatly reducing the processing difficulty and being lower in cost.
[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions described in the present application, and are not limited to the technical solutions described in the present application. For example, the definitions of "front", "rear", "left", "right", "up", "down" and the like, although the present application has been described with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still modify, combine or equivalently replace the present application, and all technical solutions and improvements which do not deviate from the spirit and scope of the present application should be covered within the scope of the claims of the present application.
Claims
1. A valve device, characterized by The valve device comprises a valve body (11), a gas tank head (13), a valve stem (14), a valve core member (22), a moving core iron (24), an adjusting elastic member (25), and a coil assembly (3). The gas tank head (13) is fixedly connected with the valve body (11). At least part of the valve stem (14) and the valve core member (22) are located in the valve body (11). One end of the valve stem (14) abuts against the gas tank head (13), and the other end abuts against the valve core member (22). The adjusting elastic member (25) is located on the side of the valve core member (22) away from the valve stem (14) and abuts against the valve core member (22). The valve body (11) has a valve port wall (111). The gas tank head (13) and the adjusting elastic member (25) jointly adjust the distance between the valve core member (22) and the valve port wall (111). At least part of the moving core iron (24) is sleeved on the valve core member (22) and axially limited and abuts against the valve core member (22). The coil assembly (3) is sleeved on the moving core iron (24). The coil assembly (3) is energized or de-energized. The moving core iron (24) and the valve core member (22) move towards the valve port wall (111) and abut against the valve port wall (111).
2. The valve device of claim 1, wherein The valve core member (22) is a rod-shaped structure and is axially spaced apart to have a valve core part (222) and an abutting part (221). The valve core part (222) can abut against or be spaced apart from the valve port wall (111). The abutting part (221) can abut against the moving core iron (24) and the adjusting elastic member (25).
3. The valve device of claim 2, wherein The moving core iron (24) has a through hole (241) and a mounting cavity (242). The mounting cavity (242) is located on the side of the through hole (241) away from the valve body (11). The through hole (241) communicates with the mounting cavity (242). The abutting part (221) is located in the mounting cavity (242). The outer diameter of the abutting part (221) is greater than the diameter of the through hole (241). The abutting part (221) can abut against the inner wall of the moving core iron (24).
4. The valve device of claim 3, wherein The adjusting elastic member (25) is located in the mounting cavity (242) and is located on the side of the abutting part (221) away from the valve core part (222) and abuts against the abutting part (221).
5. The valve device of claim 4, wherein The valve device further comprises an adjusting seat (26). The adjusting seat (26) is located on the side of the adjusting elastic member (25) away from the abutting part (221). At least part of the adjusting seat (26) is located in the mounting cavity (242). The moving core iron (24) comprises a mounting cavity wall (243) defining the mounting cavity (242). The adjusting seat (26) is connected with the mounting cavity wall (243). The adjusting elastic member (25) abuts against the adjusting seat (26).
6. The valve device of claim 5, wherein The valve device further comprises a sleeve (21) fixed to one end of the valve body (11) away from the air tank head (13), the moving core iron (24), the adjusting elastic member (25), the adjusting seat (26), and part of the valve core member (22) are arranged in the sleeve (21); and a blocking member (27) fixedly arranged at the end of the sleeve (21) away from the valve body (11), and the blocking member (27) can abut against the adjusting seat (26).
7. The valve device of claim 6, wherein The valve device further comprises a static core iron (23) fixedly arranged in the sleeve (21), and the static core iron (23) is located on the side of the moving core iron (24) close to the valve body (11), and a core iron elastic member (28) abutting against one end of the static core iron (23) and the other end of the moving core iron (24).
8. The valve device of claim 6, wherein The valve body (11) has an inner wall (113), part of the sleeve (21) is located in the valve body (11) and connected with the inner wall (113), and the outer side of the sleeve (21) has a limiting portion (213) abutting against the axial end surface of the valve body (11).
9. The valve device of claim 8, wherein The axial end surface of the valve body (11) is further provided with a mounting groove (114), and the valve device further comprises a sealing member (12) arranged in the mounting groove (114), and the limiting portion (213) abuts against the sealing member (12).
10. Valve device according to any of claims 1-9, characterized in that The valve device has a throttling mode and a cut-off mode; When the valve device is in the throttling mode, the air tank head (13) and the adjusting elastic member (25) jointly adjust the distance between the valve core member (22) and the valve port wall (111), and the valve core member (22) is spaced from the valve port wall (111); When the valve device is in the cut-off mode, the coil assembly (3) is powered on or powered off, the valve core member (22) moves towards the valve port wall (111), and the valve core member (22) abuts against the valve port wall (111).
11. A valve device characterized by comprising: The valve device comprises a valve body (11), an air tank head (13), a valve rod (14), a valve core member (22), a moving core iron (24), and an adjusting elastic member (25), the valve body (11) has a valve port wall (111), the air tank head (13) is fixed with the valve body (11), the valve rod (14) is movably arranged in the valve body (11), one end of the valve rod (14) abuts against the air tank head (13), the valve core member (22) is located on the side of the valve rod (14) away from the air tank head (13), part of the valve core member (22) is located in the valve body (11), and the valve core member (22) abuts against the valve rod (14); the adjusting elastic member (25) abuts against the valve rod (14), and the moving core iron (24) is limitingly connected with the valve core member (22). The valve device has a throttling mode, the air tank head (13) and the adjusting elastic member (25) can jointly adjust the distance between the valve core member (22) and the valve port wall (111), and the valve core member (22) is in abutment or spacing with the valve port wall (111); The valve device has a cut-off mode, the moving core iron (24) can drive the valve core member (22) to approach or move away from the valve port wall (111), and the valve core member (22) is in abutment or spacing with the valve port wall (111).