Fluid control valves

Abstract

The present invention discloses a fluid control valve, comprising a first valve body, a second valve body, and a valve core. The fluid control valve has at least a first port and a second port. The valve core comprises a core portion and a spring portion. The fluid control valve comprises a valve core accommodating chamber and a side wall portion of the accommodating chamber. The valve core is located in the valve core accommodating chamber, and the core portion and the side wall portion of the accommodating chamber are sealed. The first end of the spring portion abuts against the core portion, and the second end of the spring portion abuts against the second valve body. The core portion has a through-channel, which is connected to the first port, and the equivalent flow area of the through-channel is smaller than the equivalent flow area of the first port. The fluid control valve has a first working state and a second working state. In the first working state, the through-channel connects the first port and the second port; in the second working state, the through-channel is blocked from the second port. In this way, flow path switching is achieved, and the fluid control valve has a simple structure.

Description

Technical Field

[0001] The present invention relates to the field of fluid control. Background Art

[0002] In a heat pump system, there are generally cooling mode and heating mode. The fluid may need to pass through different components in different modes, so it is necessary to control the flow path at certain times. There is generally a solenoid valve in the heat pump system. The solenoid valve needs to use electromagnetic force to control the valve core in the valve body. The solenoid valve can be used to open, close or switch the flow path. The structure of the solenoid valve is relatively complex and the solenoid valve requires electricity. Summary of the Invention

[0003] An object of the present invention is to provide a fluid control valve with low cost.

[0004] In order to achieve the above purpose, the following technical solutions are adopted:

[0005] A fluid control valve comprises a first valve body, a second valve body, and a valve core, the first valve body and the second valve body are relatively fixed, the fluid control valve has at least a first port and a second port, the valve core comprises a core portion and a spring portion, the fluid control valve comprises a valve core accommodating chamber and a side wall portion of the accommodating chamber, the valve core is located in the valve core accommodating chamber, and the core portion and the side wall portion of the accommodating chamber are sealed, the first end of the spring portion abuts against the core portion, and the second end of the spring portion abuts against the second valve body, the core portion has a through channel, the through channel is connected to the first port, and the equivalent flow area of the through channel is smaller than the equivalent flow area of the first port; the fluid control valve has a first working state and a second working state, in the first working state, the through channel connects the first port and the second port; in the second working state, the through channel is blocked from the second port.

[0006] The above technical solution is achieved by providing a through channel in the core body, which is connected to the first port. In the first working state, the through channel connects the first port and the second port; in the second working state, the through channel is blocked from the second port, thereby achieving control of the fluid flow path flowing through the fluid control valve, and the fluid control valve has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a structural schematic diagram of an implementation scheme of a fluid control valve;

[0008] Figure 2 This is a structural schematic diagram of an implementation scheme of a fluid control valve;

[0009] Figure 3This is a structural schematic diagram of an implementation scheme of a fluid control valve;

[0010] Figure 4 This is a structural schematic diagram of an implementation scheme of a fluid control valve;

[0011] Figure 5 This is a structural schematic diagram of an implementation scheme of a fluid control valve. DETAILED DESCRIPTION

[0012] Reference Figure 1 , Figure 1 The present invention provides a structural schematic diagram of a fluid control valve, wherein the fluid control valve 100 includes a first valve body 11, a second valve body 12, and a valve core 13. The first valve body 11 and the second valve body 12 are relatively fixed. The fluid control valve 100 has at least a first port 101 and a second port 102. The valve core 13 includes a core portion 131 and a spring portion 132. The fluid control valve 100 includes a valve core accommodating chamber 107 and an accommodating chamber side wall portion 108. The valve core 13 is located in the valve core accommodating chamber 107, and the core portion 131 is sealed with the accommodating chamber side wall portion 108. The first end 1321 of the spring portion 132 abuts against the core portion 131, and the second end 1322 of the spring portion 132 abuts against the second valve body 12. The core portion 131 has a through channel 1311. The equivalent flow area of the through channel 1311 is smaller than the equivalent flow area of the first port 101 of the first valve body 11.

[0013] Specifically, the core portion 131 is located in the inner cavity of the first valve body 11, and the core portion 131 is sealed to the inner wall of the first valve body 11. The fluid control valve has a first working state and a second working state. In the first working state, the through channel 1311 connects the first port 101 and the second port 102; in the second working state, the through channel 1311 is blocked from the second port 102. The first valve body 11 and the second valve body 12 can be fixed by welding or by threaded connection.

[0014] The fluid entering from the first port 101 can be connected to the second port 102 through the through channel 1311. The fluid entering the first port 101 can also push the valve core 13 to slide along the inner wall of the first valve body 11. The valve core 13 and the second valve body 12 can also cooperate to block the through channel 1311 from being connected to the second port 102. In addition, the connection between the first port 101 and the second port 102 can be determined according to the state of the fluid entering the first port under different working conditions. The fluid control valve connection state can be achieved after setting the system requirements. The structure is simple and energy-saving.

[0015] Herein, a component blocking the communication between component A and component B means blocking more than 90% of the flow. In this way, the fluid flow path can be switched.

[0016] In this article, offsetting includes offsetting between two components, including contact offsetting between the two, and also includes indirect contact offsetting between the two through other components.

[0017] Herein, the through channel may be in the form of a straight channel, or in the form of a curved or bent channel.

[0018] exist Figure 1 In the illustrated structure, the fluid control valve 100 has a first port 101, a second port 102, and a third port 103. The first port 101 serves as a fluid inlet, while the second and third ports 102, 103 serve as fluid outlets. The first and third ports 101, 103 are located in the first valve body 11, while the second port 102 is located in the second valve body 12. The third port 103 is located on the side of the first valve body 11, with the inner cavity of the first valve body 11, where the core portion 131 is located, being axially oriented in the L direction.

[0019] The core portion 131 has two or more through-channels 1311, each of which is spaced apart circumferentially about the core portion 131. The sum of the equivalent flow areas of the through-channels 1311 is smaller than the equivalent flow area of the first port 101. As another embodiment, a portion of the through-channels 1311 may be provided in the core portion 131 as circumferential channels.

[0020] The core portion 131 has a main body portion 1312 and a raised portion 1313. The raised portion 1313 protrudes from the main body portion 1312 and protrudes toward the second valve body 12. The spring portion 132 is sleeved on the outside of the raised portion 1313, and the spring portion 132 and the main body portion 1312 are arranged to resist each other. The height of the raised portion 1313 is not less than the minimum compression height of the spring portion 132. In this way, the raised portion 1313 and the second valve body 12 can be in contact and cooperated to block the communication between the through channel and the second port.

[0021] The second valve body 12 has a bottom wall 121, which is a portion of the wall forming the valve core accommodating cavity 107. The second valve body 12 has a groove 122, which communicates with the second port 102. Along the axial direction of the core portion 131, the groove 122 corresponds to the protrusion 1313. The outer diameter of the protrusion 1313 is smaller than that of the groove 122. During the sliding of the core portion 131, the protrusion 1313 can extend into the groove 122. Radially outward from the center of the core portion 131, the bottom wall 121 is located outside the groove 122, and the through-channel 1311 is located outside the groove 122. During the sliding of the core portion 131, the protrusion 1313 extending into the groove 122 helps stabilize the core portion 131 under the impact of fluid and helps the bottom wall 121 block the communication between the through-channel 1311 and the groove 122, thereby helping to meet the performance requirements of the fluid control valve.

[0022] The core body portion 131 has an outer periphery 1314, and the outer periphery 1314 includes a first outer periphery 1314a and a second outer periphery 1314b. The first outer periphery 1314a is sealed against the wall portion of the inner cavity of the first valve body 11, and the second outer periphery 1314b is sealed against the wall portion of the inner cavity of the first valve body 11. The core body portion 131 slides relative to the wall portion of the inner cavity of the first valve body 11; the first outer periphery 1314a is relatively close to the first port 101, and the second outer periphery 1314b is relatively far away from the first port 101.

[0023] The first valve body 11 includes a step wall 111 . The step wall 111 is adjacent to the first port 101 relative to the second port 102 . The core portion 131 can abut against the step wall 111 , which helps stabilize the structure of the core portion 131 .

[0024] The first outer periphery 1314a and the second outer periphery 1314b can be used to seal with the inner wall of the first valve body 11. The first outer periphery 1314a, the second outer periphery 1314b and the inner wall of the first valve body 11 can be dynamically sealed. The fluid control valve includes a first sealing ring 14 and a second sealing ring 15. The first sealing ring 14 and the second sealing ring 15 can be clamped on the first outer periphery 1314a and the second outer periphery 1314b of the core body 131, which facilitates the assembly of the structure of the core body 131 and also helps to position the first sealing ring 14 and the second sealing ring 15, which is not conducive to falling off.

[0025] The fluid control valve 100 has a first working state and a second working state. In the first working state, along the axial direction of the first valve body 11, the first outer periphery 1314a and the second outer periphery 1314b are located on both sides of the third port 103, and the through channel 1311 connects the first port and the second port; in the second working state, along the axial direction of the first valve body 11, the first outer periphery 1314a and the second outer periphery 1314b are away from the first port 101 relative to the third port 103; the first port 101 is connected to the third port 103.

[0026] When the fluid control valve 100 is used in a system, it can be used to switch a flow path, either to a flow path connected to the second port 102 or to a flow path connected to the third port 103. The fluid control valve 100 has a simple structure, and its flow path switching is achieved through fluid characteristics, reducing costs.

[0027] The fluid control valve 100 also includes a third valve body 16 and a second valve core 17. The first valve body 11 is fixed to the third valve body 16. The third valve body 16 has a second valve core accommodating chamber 161. The second valve core 17 is located in the second valve core accommodating chamber 161 of the third valve body 16. The second valve core 17 is slidably arranged relative to the wall of the second valve core accommodating chamber 161 of the third valve body 16. The second valve core 17 slides to connect the second valve core accommodating chamber 161 and the third port 103, or the second valve core 17 blocks the second valve core accommodating chamber 161 and the third port 103.

[0028] The fluid control valve 100 has an insulating component 18, which blocks the first valve body 11 and the third valve body 16. The first valve body 11 has a protrusion 115, which extends into the third valve body 16. The insulating component 18 has a base 181 and a cylindrical portion 182. The cylindrical portion 182 protrudes and extends from the base 181, and the cylindrical portion 182 is sleeved on the protrusion 115. The base 181 is located between the first valve body 11 and the third valve body 16. The cylindrical portion 182 is sealed from the first valve body 11, and the cylindrical portion 182 is sealed from the third valve body 16.

[0029] There is a radial seal between the cylindrical portion 182 and the first valve body 11 , and a radial seal between the cylindrical portion 182 and the third valve body 16 ; the first valve body 11 is made of metal material, the third valve body 16 is made of metal material, and the heat insulating component 18 is made of plastic or plastic ester material.

[0030] The fluid control valve 100 has a fourth port 104 and a fifth port 105. The second valve core 17 has a first actuation state and a second actuation state. When the second valve core 17 is in the first actuation state, the second valve core 17 blocks communication between the third port 103 and the fourth port 104. The fourth port 104 communicates with the second valve core accommodating chamber 161, and the fifth port 105 communicates with the second valve core accommodating chamber 161. When the second valve core 17 is in the second actuation state, the second valve core 17 blocks communication between the fourth port 104 and the fifth port 105, and the third port 103 communicates with the fourth port 104. Thus, when the fluid control valve 100 is used in a system, in cooling mode, fluid can enter through the first port 101 and exit through the second port 102; fluid can enter through the fourth port 104 and exit through the fifth port 105. In heating mode, fluid can enter through the first port 101 and exit through the fourth port 104. In this way, the fluid control valve 100 can realize the function of switching the flow path under different working conditions when used in the system, and the fluid control valve 100 has a simple structure and low cost.

[0031] Figure 2The structure of the fluid control valve 200 is shown schematically. The structure of the fluid control valve 200 is generally similar to that of the fluid control valve 100. The fluid control valve 200 includes a first valve body 11 and a second valve body 12. The second valve body 12 has a bottom wall portion 121. In the axial direction of the core portion 131, the core portion 131 and the bottom wall portion 121 correspond in position. The core portion 131 can slide relative to the side wall portion 108 of the accommodating chamber. The second valve body 12 has a groove 122. The outer diameter of the protrusion 1313 is larger than that of the groove 122. The through-channel 1311 is located around the groove 122. The bottom wall portion 121 can block the communication between the through-channel 1311 and the groove 122. The second valve body 12 has a first annular groove, and the core portion 131 has a second annular groove. The second end portion 1322 of the spring portion is located in the first annular groove, and the first end portion 1321 of the spring portion is located in the second annular groove.

[0032] Figure 3 The structure of a fluid control valve 300 is shown schematically. The structure of the fluid control valve 300 is generally similar to that of the fluid control valve 100. The fluid control valve 300 includes a first valve body 11 and a second valve body 12. The second valve body 12 has a recess 122. The core portion 131 has a through-channel 1311 located around the recess 122. In the radial direction of the core portion 131, at least a portion of the bottom wall portion 121 is located between the through-channel 1311 and the recess 122. The second valve body 12 has a bottom wall portion 121, and the core portion 131 can abut against the bottom wall portion 121. The core portion 131 has a recess 1315. The first end 1321 of the spring portion 132 is positioned relative to the core portion 131, and the second end 1322 of the spring portion 132 is positioned relative to the second valve body 12. Furthermore, the first end 1321 of the spring portion 132 is located in the recess 1315 and abuts against the recess 1315. In the axial direction of the core portion 131, the recess 1315 is located opposite the groove 122. The second end 1322 of the spring portion 132 is located in the groove 122. The second valve body 12 has a step 1221, which is located in the groove 122. The second end 1322 of the spring portion 132 abuts against the step 1221, and at least a portion of the spring portion 132 is accommodated in the groove 122. At least a portion of the spring portion 132 is accommodated in the groove 122, and the depth of the groove 122 is not less than the minimum compressed height of the spring portion 132. In this way, when the core portion 131 abuts against the second valve body 12, the spring portion 132 can be accommodated in the groove 122, and the core portion 131 can abut against the bottom wall 121.

[0033] Reference Figure 4 , Figure 4The structure of the fluid control valve 400 is schematically shown. The fluid control valve 400 includes a first valve body 11 and a second valve body 12. The first port 101, the second port 102, and the third port 103 are located in the first valve body 11. The inner cavity of the core body 131 of the first valve body 11 is set as the axial direction. The third port 103 is opened on the side of the first valve body 11, and the second port 102 is opened on the side of the first valve body 11.

[0034] The core portion 131 has an annular main body portion 1316 . A through channel 1311 is opened in the middle of the annular main body portion 1316 . There is only one through channel 1311 , and the equivalent flow area of the through channel 1311 is smaller than the equivalent flow area of the first port 101 .

[0035] The annular main body 1316 has a protrusion 1317, and the spring portion 132 is sleeved on the protrusion 1317. The first end 1321 of the spring portion 132 is against the annular main body 1316, and the second end 1322 of the spring portion 132 is against the bottom wall portion 121. The protruding height of the protrusion 1317 is not less than the minimum compression height of the spring portion 132. During the movement of the protrusion 1317 toward the bottom wall portion 121, the protrusion 1317 can be against the bottom wall portion 121, and the bottom wall portion 121 blocks the through channel 1131 from communicating with the second port 102.

[0036] Figure 5 The structure of the fluid control valve 500 is schematically shown. The fluid control valve 500 includes a first valve body 11 and a second valve body 12. The first port 101 and the third port 103 are located in the first valve body 11, and the second port 102 is located in the second valve body 12. The inner cavity of the core body 131 of the first valve body 11 is set as the axial direction, the third port 103 and the first port 101 are located in the axial direction of the core body 131, and the second port 102 is opened on the side of the first valve body 11.

[0037] The core portion 131 has an annular main body portion 1316, and a through channel 1311 is opened in the middle of the annular main body portion 1316. There is one through channel 1311, and the equivalent flow area of the through channel 1311 is smaller than the equivalent flow area of the first port 101. The equivalent flow area of the through channel 1311 is smaller than the equivalent flow area of the second port 102.

[0038] The annular main body 1316 has a protrusion 1317, and the spring portion 132 is sleeved on the protrusion 1317. The first end 1321 of the spring portion 132 is against the annular main body 1316, and the second end 1322 of the spring portion 132 is against the bottom wall portion 121. The protruding height of the protrusion 1317 is not less than the minimum compression height of the spring portion 132. During the movement of the protrusion 1317 toward the bottom wall portion 121, the protrusion 1317 can be against the bottom wall portion 121, and the bottom wall portion 121 blocks the through channel 1131 from communicating with the second port 102.

[0039] The bottom wall portion 121 includes a groove 122, which is connected to the second port 102. The bottom wall portion 121 has a protrusion 1212, and the side of the protrusion 1212 has a through hole 1213, which is connected to the inner cavity of the first valve body 11. The top of the protrusion 1212 can be against the annular main body 1316. When the annular main body 1316 moves toward the protrusion 1212, the top of the protrusion 1212 can be against the annular main body 1316.

[0040] Figure 4 、 Figure 5 The through channel 1131 of the illustrated fluid control valve may also be a plurality of separated channels.

[0041] The above embodiment is merely exemplary. The valve core accommodating cavity of the valve core 13 may also be provided in the second valve body, or the valve core accommodating cavity of the valve core 13 may also be provided in the first valve body and the second valve body. The second valve core accommodating cavity may also be provided in the first valve body. The fluid control valve may also include a four-part valve body, which is assembled and fixed by the four-part valve body.

[0042] 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. For example, regarding the directional definitions of “front”, “back”, “left”, “right”, “up” and “down”, although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be combined, modified or replaced by each other, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A fluid control valve, comprising a first valve body, a second valve body, and a valve core, wherein the first valve body and the second valve body are relatively fixed, the fluid control valve having at least a first port, a second port, and a third port, the valve core comprising a core portion and a spring portion, with the inner cavity of the first valve body where the core portion is provided being the axial direction, the third port being opened at a side portion of the first valve body, the fluid control valve comprising a valve core accommodating cavity and a side wall portion of the accommodating cavity, the valve core being located in the valve core accommodating cavity, and the core portion being sealed against the side wall portion of the accommodating cavity, a first end of the spring portion being against the core portion, a second end of the spring portion being against the second valve body, the core portion having a through-channel, the through-channel being communicated with the first port, an equivalent flow area of the through-channel being smaller than an equivalent flow area of the first port; The fluid control valve has a first working state and a second working state. In the first working state, the through-channel connects the first port and the second port; in the second working state, the through-channel is blocked from the second port. The fluid control valve includes a third valve body and a second valve core, the first valve body is fixed to the third valve body, the fluid control valve has a second valve core accommodating chamber and a second accommodating chamber side wall, the second valve core is located in the second valve core accommodating chamber, the second valve core is slidably arranged relative to the second accommodating chamber side wall, the second valve core slides to connect the second valve core accommodating chamber and the third port, or the second valve core blocks the second valve core accommodating chamber and the third port.

2. The fluid control valve according to claim 1, wherein: The core portion has two or more through-channels, each through-channel is spaced apart in the circumferential direction of the core portion, and the sum of the equivalent flow areas of the through-channels is smaller than the equivalent flow area of the first port.

3. The fluid control valve according to claim 1, wherein: The core portion has an annular main body portion, the through-channel is opened in the middle of the annular main body portion, there is one through-channel, and the equivalent flow area of the through-channel is smaller than the equivalent flow area of the first port.

4. The fluid control valve according to claim 1 or 2, characterized in that: The first valve body and the second valve body are fixed by welding, or the first valve body and the second valve body are fixed by threaded connection; The core portion includes a main body portion and a raised portion, the raised portion protrudes from the main body portion, the raised portion protrudes toward the second valve body, the spring portion is sleeved on the outside of the raised portion, the spring portion is arranged to resist the main body portion, and the height of the raised portion is not less than the minimum compression height of the spring portion.

5. The fluid control valve according to claim 2, wherein: The second valve body has a bottom wall portion, which is a part of the wall portion forming the valve core accommodating cavity. The second valve body has a groove, which is connected to the second port. The valve core has a protrusion, which corresponds to the protrusion, and the outer diameter of the protrusion is smaller than the groove. In the radial outward direction from the center of the core body, the through channel is located outside the groove, and the bottom wall portion can block the communication between the through channel and the groove.

6. The fluid control valve according to claim 2, wherein: The second valve body has a groove and a bottom wall portion, the through-channel is located on the circumferential side of the groove, and in the radial direction of the core body, at least part of the bottom wall portion is located between the through-channel and the groove, the core body has a recessed portion, the first end of the spring portion is located in the recessed portion, and the first end is abutted against the recessed portion, and in the axial direction of the core body, the position of the recess is opposite to the groove, the second end of the spring portion is located in the groove, the second valve body has a step portion, the step portion is located in the groove, the second end of the spring portion is abutted against the step portion, at least part of the spring portion is accommodated in the groove, and the depth of the groove is not less than the minimum compression height of the spring portion.

7. The fluid control valve according to claim 3, wherein: The second valve body has a bottom wall portion, the annular main body portion has a protrusion portion, the spring portion is sleeved on the protrusion portion, the first end of the spring portion is against the annular main body portion, the second end of the spring portion is against the bottom wall portion, the protruding height of the protrusion is not less than the minimum compression height of the spring portion, and the bottom wall portion can block the through channel from being connected to the second port.

8. The fluid control valve according to claim 3, wherein: The second valve body has a bottom wall portion, the annular main body portion has a protrusion portion, the spring portion is sleeved on the protrusion portion, the first end of the spring portion abuts against the annular main body portion, and the second end of the spring portion abuts against the bottom wall portion, the protrusion height is not less than the minimum compression height of the spring portion, and the bottom wall portion can block the through channel from communicating with the second port; The bottom wall portion includes a groove, which is connected to the second port. The bottom wall portion has a protrusion, and the side of the protrusion has a through hole, which is connected to the valve core accommodating cavity. When the annular main body moves toward the protrusion, the top of the protrusion can be against the annular main body.

9. The fluid control valve according to claim 1, 2 or 3, characterized in that: The first port and the third port are located in the first valve body, and the second port is located in the second valve body; Alternatively, the first port, the second port and the third port are located in the first valve body, with the inner cavity of the core portion of the first valve body being the axial direction, and the second port is opened on the side of the first valve body.

10. The fluid control valve according to claim 9, wherein: The core portion has an outer periphery, the outer periphery including a first outer periphery and a second outer periphery, the first outer periphery being sealed against a wall portion of an inner cavity of the first valve body, the second outer periphery being sealed against a wall portion of an inner cavity of the first valve body, and the core portion sliding relative to the wall portion of the inner cavity of the first valve body; The fluid control valve has a first working state and a second working state. In the first working state, along the axial direction of the first valve body, the first outer periphery and the second outer periphery are located on both sides of the third port, and the through passage communicates with the first port and the second port. In the second working state, along the axial direction of the first valve body, the first outer periphery and the second outer periphery are away from the first port relative to the third port; and the first port is communicated with the third port.

11. The fluid control valve according to claim 10, wherein: The fluid control valve has a heat insulation component, which blocks the first valve body and the third valve body. The first valve body has a protrusion, which extends into the third valve body. The heat insulation component has a base and a cylindrical portion, which protrudes and extends from the base. The cylindrical portion is sleeved on the protrusion. The base is located between the first valve body and the third valve body. The cylindrical portion is sealed against the first valve body and the third valve body.

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