Proportioning valve

Abstract

The invention discloses a proportioning valve. The proportioning valve comprises a shell, a valve element and a sealing device. The sealing device and the valve element are arranged in the mode that the effective operation angle of the valve element is larger than the sum of central angles corresponding to two shell outlets in the at least two shell outlets, and the effective operation angle of the valve element enables the valve element outlet to be communicated with the two shell outlets at the same time. And a rotation angle for changing the opening degree of the at least one housing outlet. According to the proportioning valve, the inner side sealing opening and the valve element outlet are set to be larger than the size of the shell outlet, so that the opening degree adjusting range of the shell outlet is enlarged, and the opening degree of the shell outlet is adjusted more accurately under the condition that the size of the valve element and the total rotation angle are not changed; therefore, the flow ratio between the shell inlet and the shell outlet and the flow ratio between the shell outlets can be adjusted more accurately.

Description

Technical Field

[0001] This application relates to control valves, and more particularly to a proportional control valve. Background Technology

[0002] A control valve includes a housing and a valve core, the valve core being movably disposed within the housing. The housing has a housing outlet. Generally, the valve core can perform linear or rotary motion. As the valve core moves, it adjusts the opening degree of the housing outlet, thereby regulating the flow rate at the housing outlet. When the housing has multiple housing outlets, adjusting the opening degree of each outlet can regulate the flow rate ratio between them. Summary of the Invention

[0003] This application provides a proportional control valve, comprising: a housing, a valve core, and a sealing device. The housing defines a mounting cavity and has at least two housing outlets. The valve core is disposed within the mounting cavity and is rotatable about an axis. The valve core includes a circumferential sidewall extending circumferentially along the valve core, the circumferential sidewall having a valve core blocking wall and a valve core outlet. The valve core is configured such that, with rotation of the valve core, the opening degree of the at least two housing outlets can be adjusted via the valve core blocking wall and the valve core outlet, thereby adjusting the flow ratio between the at least two housing outlets. The sealing device is connected inside the housing and located between the valve core and the housing. The sealing device includes at least two sealing cavities corresponding to the at least two housing outlets, wherein each sealing cavity forms an inner sealing opening on the inner surface of the sealing device, the opening degree of the inner sealing opening being the same as the opening degree of the corresponding housing outlet. The sealing device and the valve core are configured such that the effective operating angle of the valve core is greater than the sum of the central angles of the two housing outlets among the at least two housing outlets, wherein the effective operating angle of the valve core is a rotation angle that enables the valve core outlet to communicate with both housing outlets simultaneously and causes the opening of at least one housing outlet to change.

[0004] Based on the above, the circumferential dimensions of the inner sealing opening and the valve core outlet are both larger than the corresponding dimensions of each housing outlet.

[0005] According to the above, each of the sealing cavities forms an outer sealing opening on the outer surface of the sealing device, and the outer sealing opening, the inner sealing opening, and the valve core outlet have the same circumferential dimensions.

[0006] Based on the above, the opening degree of each of the housing outlets is 0 to 100%, and the radial dimension of the sealing cavity is set to be no less than 60% of the diameter of the corresponding housing outlet.

[0007] According to the above, the sealing device includes a first sealing element and a second sealing element connected to each other, the second sealing element being disposed inside the first sealing element, wherein the first sealing element is made of a hard material and the second sealing element is made of a soft material.

[0008] Based on the above, the first seal is made of plastic material, and / or the second seal is made of rubber material.

[0009] According to the above, the first sealing member has at least two first sealing windows, and the second sealing member has at least two second sealing windows. The first sealing windows and the second sealing windows are matched and aligned to form the at least two sealing cavities, wherein the second sealing window has the inner sealing opening.

[0010] Based on the above, the first seal and the second seal are configured to be detachably snap-fit ​​connected.

[0011] According to the above, the first seal has an inwardly protruding engaging portion, which includes a circumferential flange and an axial ridge. The circumferential flange is disposed at the edge of at least one first sealing window and protrudes from the outside inward and extends circumferentially. The axial ridge is disposed between the at least two first sealing windows and protrudes from the outside inward and extends axially. The second seal has a receiving portion that mates with the engaging portion. The receiving portion includes a circumferential groove and an axial notch. The circumferential groove is disposed at the edge of a corresponding second sealing window and recesses from the outside inward and extends circumferentially to engage the circumferential flange. The axial notch is disposed between the at least two second sealing windows and extends axially through the second seal, such that both ends of the second seal at the axial notch engage with the opposite sides of the axial ridge.

[0012] According to the above, the sealing device further includes an additional sealing strip, which is disposed around the first sealing window on the outer wall of the first sealing member, and the additional sealing strip is configured to abut against the inner wall of the housing.

[0013] Based on the above, the housing has a housing inlet. The valve core has a valve core inlet and a valve core channel, the valve core channel being in fluid communication with the valve core inlet and the valve core outlet, and the circumferential dimension of the valve core inlet is set such that, as the valve core rotates, the valve core inlet remains in fluid communication with the housing inlet.

[0014] According to the above, the valve core includes an upper valve core and a lower valve core, the valve core inlet is disposed in the upper valve core, the lower valve core has the circumferential sidewall, and the sealing device is disposed around the circumferential sidewall of the lower valve core.

[0015] Based on the above, the valve core includes a rotating shaft having the axis, wherein the rotating shaft can be driven to rotate by an actuator.

[0016] According to the above, the valve core also includes a valve core sealing strip, which is disposed on the outer wall of the circumferential sidewall and is configured to abut against the inner wall of the sealing device.

[0017] The following will further explain the concept, specific structure and technical effects of this application in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this application. Attached Figure Description

[0018] Figure 1A This is a perspective view of a proportional control valve at one angle according to an embodiment of this application;

[0019] Figure 1B yes Figure 1A An exploded view of the proportional control valve shown from another angle;

[0020] Figure 2A yes Figure 1A The diagram shows a front view of the proportional control valve after removing the actuator and actuator mounting base.

[0021] Figure 2B yes Figure 2A The proportional control valve shown is a cross-sectional view along line AA.

[0022] Figure 2C yes Figure 2A The diagram shown is an exploded view of the proportional control valve at one angle.

[0023] Figure 3A yes Figure 2C A front view of the valve core;

[0024] Figure 3B yes Figure 3A The valve core shown is a cross-sectional view along line CC.

[0025] Figure 3C yes Figure 3A The valve core shown is a cross-sectional view along line DD.

[0026] Figure 4A yes Figure 2C A three-dimensional structural diagram of the sealing device in the diagram;

[0027] Figure 4B yes Figure 4A A cross-sectional view of the sealing device shown;

[0028] Figure 4C yes Figure 4A An exploded view of the sealing device shown;

[0029] Figures 5A-5C This illustrates the process of adjusting the opening degree of the proportional control valve's housing outlet during valve core rotation. Detailed Implementation

[0030] Various specific embodiments of this application will now be described with reference to the accompanying drawings, which form part of this specification. It should be understood that although directional terms such as "front," "rear," "upper," "lower," "left," "right," "top," and "bottom" are used in this application to describe the orientation of various example structural parts and elements, their use herein is merely for illustrative purposes and is based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in this application can be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered limiting. Where possible, the same or similar reference numerals used in this application refer to the same parts.

[0031] Figure 1A and Figure 1B The diagram illustrates the general structure of a proportional control valve 100 according to one embodiment of this application, serving to explain the external structure and general components of the proportional control valve 100. Figure 1A This is a top-down perspective view of the proportional control valve 100. Figure 1B This is an exploded view of the proportional control valve 100 from a bottom-view angle. (See diagram below.) Figure 1A and Figure 1B As shown, the proportional control valve 100 includes a housing 101, an actuator 110, and an actuator mounting base 104. The actuator 110 is mounted on top of the housing 101 via the actuator mounting base 104. A mounting cavity 209 is defined within the housing 101 (see [reference]). Figure 2B As shown, the housing 101 has a housing inlet 102 communicating with the mounting cavity 209 and two housing outlets 103. In this embodiment, the housing inlet 102 is located above the two housing outlets 103, and the two housing outlets 103 are located at approximately the same height.

[0032] The proportional control valve 100 also includes a valve core 111 disposed in the mounting cavity 209. The top of the valve core 111 passes through the actuator mounting seat 104 and engages with the actuator 110, allowing the valve core 111 to be driven to rotate by the actuator 110. As the valve core 111 rotates, it fluidly communicates the housing inlet 102 with one or both housing outlets 103, and adjusts the flow ratio between the two housing outlets 103 by regulating the opening degree of the two housing outlets 103. In this embodiment, the opening degree of the housing outlet 103 is 0 to 100%. When the opening degree of the housing outlet 103 is 0%, the housing outlet 103 is closed. And when the opening degree of the housing outlet 103 is 100%, the housing outlet 103 is fully open.

[0033] The proportional control valve 100 also includes a sealing device 120, which is disposed between the valve core 111 and the housing 101 to ensure the sealing of the valve core 111 during the process of connecting the housing inlet 102 and the housing outlet 103. The sealing device 120 is connected to the inner side of the housing 101, and the valve core 111 rotates relative to the sealing device 120.

[0034] Specifically, the actuator mounting base 104 is fastened to the top of the housing 101 by several bolts 105. The bottom of the actuator mounting base 104 has an annular sealing ring 106. The annular sealing cavity 106 sealably connects the housing 101 and the actuator mounting base 104 to prevent fluid leakage inside the housing 101. The rotating shaft 108 at the top of the valve core 111 passes through the actuator mounting base 104 from below and extends to engage with the actuator 110, enabling the actuator 110 to drive the valve core 111 to rotate about the axis of the rotating shaft 108. In this embodiment, a sealing ring 136 is fitted on the rotating shaft 108. The sealing ring 136 abuts against the actuator mounting base 104 and the rotating shaft 108 as the rotating shaft 108 passes through the actuator mounting base 104, preventing fluid from entering the actuator 110. Those skilled in the art will understand that in some embodiments, in addition to the sealing ring 136, a sealing element 219 (see [link to documentation]) is also fitted on the rotating shaft 108. Figure 2B (as shown), to better seal the connection between the rotating shaft 108 and the actuator mounting base 104.

[0035] The valve core 111 is generally cylindrical in shape, with an axially extending valve core channel 118. The valve core 111 includes an upper valve core 112 and a lower valve core 113, with the outer diameter of the upper valve core 112 being larger than that of the lower valve core 113. The valve core channel 118 is in fluid communication with the lower valve core 113 of the upper valve core 112. The valve core channel 118 has a valve core inlet 115 and a valve core outlet 116, with the valve core inlet 115 located on the upper valve core 112 and the valve core outlet 116 located on the lower valve core 113. The circumferential dimension of the valve core inlet 115 is configured such that, during rotation of the valve core 111, the valve core inlet 115 remains in fluid communication with the housing inlet 102. The circumferential dimension of the valve core outlet 116 is configured such that, during rotation of the valve core 111, the valve core outlet 116 is in fluid communication with one or both of the two housing outlets 103, or the valve core outlet 116 is not in fluid communication with the housing outlets 103.

[0036] A sealing device 120 is disposed between the housing 101 and the lower valve core 113, surrounding the lower valve core 113. The sealing device 120 has sealing cavities 128 corresponding to the housing outlet 103, each sealing cavity 128 surrounding the corresponding housing outlet 103. The valve core outlet 116 is sealed to or disconnected from the corresponding housing outlet 103 through the sealing cavity 128. In this embodiment, the circumferential dimension of the sealing cavity 128 is larger than the circumferential dimension of the housing outlet 103, so that the sealing cavity 128 can enlarge the circumferential dimension of the corresponding housing outlet 103. This allows for more precise adjustment of the opening degree of the housing outlet 103 when the rotation angle of the valve core 111 is constant, and more precise adjustment of the flow ratio between the two housing outlets 103 when the valve core 111 is simultaneously connected to both housing outlets 103. In this application, the effective operating angle of the valve core 111 can be greater than the sum of the central angles corresponding to the two housing outlets 103. Here, the effective operating angle of the valve core refers to the rotation angle at which the valve core outlet 116 is simultaneously connected to both housing outlets 103, causing a change in the opening degree of at least one housing outlet 103. Furthermore, in this application, more precise adjustment means that the rate of change in flow rate when the actuator 110 drives the valve core 111 to rotate by a unit angle is smaller, resulting in higher adjustment accuracy.

[0037] Those skilled in the art will understand that in other embodiments, more housing outlets may be provided, or the housing outlets may be set at different heights, requiring only the valve core outlets on the valve core to be provided accordingly. The housing 101 is also provided with a mounting plate 107, through which the proportional regulating valve 100 can be mounted to other components of the vehicle.

[0038] Figures 2A-2C The diagram shows the structure of the proportional control valve 100 with the actuator 110 and actuator mounting base 104 omitted, illustrating the more specific components and mating structure of the proportional control valve 100. Figure 2A The front view of the proportional control valve 100 is shown. Figure 2B Show Figure 2A A cross-sectional view of the proportional control valve 100 along line AA. Figure 2C Show Figure 2A An exploded view of the proportional control valve 100 from a top-down perspective. (See diagram below.) Figures 2A-2C As shown, the housing 101 is a cylindrical shape with an open top, and the actuator mounting base 104 is capable of closing the open top of the housing 101. The bottom of the housing 101 has an upwardly protruding fixing shaft 229, which is used for a limiting connection with the valve core 111. The housing outlet 103 includes housing outlet 103a and housing outlet 103b of the same height.

[0039] The valve core 111 is rotatably disposed in the mounting cavity 209 of the housing 101. The top of the valve core 111 has a rotating shaft 108 for engaging with the actuator 110, and the bottom of the valve core 111 has a receiving sleeve 231 for receiving a fixed shaft 229 at the bottom of the housing 101. The rotating shaft 108 and the fixed shaft 229 have a common axis i, allowing the valve core 111 to rotate about axis i under the drive of the actuator 110. The rotating shaft 108 extends from the top of the housing 101. A sealing ring 219 and a sealing ring 136 are fitted onto the rotating shaft 108. The sealing ring 219 is fitted below the top of the housing 101 to form a seal between the rotating shaft 108 and the housing 101, preventing fluid leakage from the interior of the housing 101. As described above, the sealing ring 136 is fitted above the top of the housing 101 to form a seal between the rotating shaft 108 and the actuator mounting base 104. Therefore, the fluid that enters the interior of the housing 101 from the housing inlet 102 can only flow out from the housing outlet 103.

[0040] The valve core passage 118 of valve core 111 extends longitudinally to connect the valve core inlet 115 of upper valve core 112 and the valve core outlet 116 of lower valve core 113. The outer diameter of upper valve core 112 is larger than the outer diameter of lower valve core 113. The total outer diameter of lower valve core 113 and sealing device 120 is approximately equal to the outer diameter of upper valve core 112, and both are approximately the same as the inner diameter of housing 101. Specifically, upper valve core 112 has a circumferentially extending opening to form valve core inlet 115. The height of valve core inlet 115 is approximately aligned with the height of housing inlet 102 so that fluid entering the housing 101 from housing inlet 102 can pass through valve core inlet 115 into valve core passage 118. Valve core passage 118 extends longitudinally from the opening of valve core inlet 115 to the bottom of lower valve core 113. The lower valve core 113 has a circumferential sidewall 214, which has a valve core outlet 116 and a valve core blocking wall 217. In this embodiment, the circumferential sidewall 214 has a circumferentially extending opening to form the valve core outlet 116, the height of which is aligned with the height of the housing outlet 103. The portion of the circumferential sidewall 214 without an opening within the height range of the valve core outlet 116 forms the valve core blocking wall 217. The valve core outlet 116 communicates with the sealing cavity 128 and the corresponding housing outlet 103, and the valve core blocking wall 217 at least partially blocks the sealing cavity 128 and the corresponding housing outlet 103, so that as the valve core 111 rotates, the valve core outlet 116 and the valve core blocking wall 217 can jointly adjust the opening of the two housing outlets 103, thereby adjusting the flow ratio between the two housing outlets 103.

[0041] In this embodiment, the sealing device 120 includes a first sealing element 221 and a second sealing element 222, which are connected to each other, and the second sealing element 222 is disposed inside the first sealing element 221. The first sealing element 221 is in sealing contact with and fixedly connected to the housing 101, and the second sealing element 222 is in sealing contact with and rotates relative to the valve core 111. In some embodiments, the second sealing element 222 has better sealing performance than the first sealing element 221. In some embodiments, the first sealing element 221 is made of a hard material, such as plastic, to give the sealing device 120 better strength. The second sealing element 222 is made of a soft material, such as rubber, to meet the sealing requirements between the sealing device 120 and the valve core 111. In some embodiments, the first sealing element 221 and the second sealing element 222 are configured to be detachably snap-fit ​​connected to facilitate replacement of the second sealing element 222. Those skilled in the art will understand that in some embodiments, the sealing device 120 may not include two sealing elements, but may be integrally formed, or the first sealing element and the second sealing element may not be made of hard material and soft material respectively, as long as the sealing device can meet the strength and sealing performance requirements.

[0042] In this embodiment, the valve core 111 further includes a valve core sealing strip 223. The valve core sealing strip 223 is disposed on the outer wall of the circumferential sidewall 214 of the valve core 111 and abuts against the inner wall of the sealing device 120. The sealing device 120 also includes an additional sealing strip 227. The additional sealing strip 227 is disposed on the outer wall of the first sealing member 221 and abuts against the inner wall of the housing 101. In some embodiments, both the valve core sealing strip 223 and the additional sealing strip 227 are made of a soft material, such as rubber. By providing the valve core sealing strip 223 and the additional sealing strip 227, a better sealing effect can be achieved between the housing 101, the sealing device 120, and the valve core 111.

[0043] Figures 3A-3C The specific structure of valve core 111 is shown. Figure 3A A front view of valve core 111 is shown. Figure 3B Show Figure 3A The cross-sectional view of valve core 111 along line CC is used to show the structure of upper valve core 112. Figure 3C Show Figure 3A The cross-sectional view of valve core 111 along line DD is used to show the structure of the lower valve core 113. For example... Figures 3A-3CAs shown, the upper valve core 112 is a cylindrical shape with a sealed top, and the valve core inlet 115 extends circumferentially along the cylindrical wall of the upper valve core 112. The central angle corresponding to the circumferential dimension of the valve core inlet 115 is approximately the same as the rotation angle of the valve core 111, so that as the valve core 111 rotates, the valve core inlet 115 can maintain fluid communication with the housing inlet 102. In some embodiments, the rotation angle of the valve core 111 is 200 to 210°, and the central angle corresponding to the circumferential dimension of the valve core inlet 115 is correspondingly set to 200 to 210°.

[0044] The lower valve core 113 is also cylindrical, with a hollow interior. The cylindrical wall of the lower valve core 113 forms a circumferential sidewall 214. The top of the lower valve core 113 is connected to the bottom of the upper valve core 112, and the bottom of the lower valve core 113 is open. The receiving sleeve 231 of the lower valve core 113 is connected to the center of the lower valve core 113 by several support rods 332 to facilitate the positioning connection between the valve core 113 and the housing 101. In some embodiments, the bottom of the lower valve core 113 can also be configured with other shapes, as long as it can be positioned and connected to the housing 101. The valve core outlet 116 extends circumferentially on the circumferential sidewall 214 of the lower valve core 113 to form a valve core outlet 116 and a valve core blocking wall 217 on the circumferential sidewall 214. The circumferential dimension of the valve core outlet 116 is approximately the same as the inner sealing opening 442 of the sealing cavity 128 of the sealing device 120 (see...). Figure 4B The circumferential dimensions of the valve core 113 and the sealing cavity 128 are identical, so that when the valve core 111 rotates to align the valve core outlet 116 with the sealing cavity 128, the sealing cavity 128 does not obstruct the flow of fluid from the valve core outlet 116, thereby allowing the housing outlet 103 to open to 100%. A valve core sealing strip 223 is disposed around the valve core outlet 116 on the outer wall of the lower valve core 113 to better seal the lower valve core 113 near the valve core outlet 116 and the sealing device 120. In some embodiments, the valve core sealing strip 223 includes a circumferentially extending portion and an axially extending portion surrounding the valve core outlet 116.

[0045] The valve core channel 118 extends longitudinally from the upper valve core 112 to the lower valve core 113, and its cross-sectional area in the upper valve core 112 is the same as its cross-sectional area in the lower valve core 113. That is, the flow area of ​​the fluid flowing in the valve core channel 118 remains unchanged. Since the outer diameter of the upper valve core 112 is larger than the outer diameter of the lower valve core 113, the same cross-sectional area of ​​the valve core channel 118 will result in a greater wall thickness in the upper valve core 112 than in the lower valve core 113.

[0046] Figures 4A-4C The specific structure of the sealing device 120 is shown. Figure 4A Show Figure 2C A three-dimensional structural diagram of the sealing device 120. Figure 4BShow Figure 4A The sealing device 120 in Figure 3A A sectional view cut at line DD in the diagram. Figure 4C An exploded view is shown after separating the first seal 221 and the second seal 222 of the sealing device 120, with the additional sealing strip 227 omitted. Figures 4A-4C As shown, the inner wall of the first seal 221 has an engaging portion, and the second seal 222 has a receiving portion that cooperates with the engaging portion. Through the cooperation of the engaging portion and the receiving portion, the first seal 221 and the second seal 222 can be detachably engaged and connected.

[0047] Specifically, the first sealing element 221 is annular in shape and has two spaced-apart first sealing windows 425 on its sidewall. Each first sealing window 425 penetrates the sidewall of the first sealing element 221 to form part of the sealing cavity 128. The engaging portion of the first sealing element 221 includes a circumferential flange 443 and an axial ridge 445. The circumferential flange 443 is located at the edge of each first sealing window 425 and protrudes from the outside inward and extends circumferentially. The axial ridge 445 is located on the inner wall of the sidewall of the first sealing element 221 and is located between the two first sealing windows 425, protruding inward and extending axially. The outer wall of the first sealing element 221 has a receiving groove 437 for receiving an additional sealing strip 227. In this embodiment, the receiving groove 437 includes a circumferentially extending groove and an axially extending groove around each first sealing window 425, so that the additional sealing strip 227 can better seal the first sealing element 221 and the housing 101.

[0048] The second seal 222 is also annular in shape, and has two spaced-apart second sealing windows 426 and a connecting portion 452 on its sidewall. The two second sealing windows 426 are located on opposite sides of the connecting portion 452 in the circumferential direction. Each second sealing window 426 penetrates the sidewall of the second seal 222. The two second sealing windows 426 mate with and are aligned with the two first sealing windows 425, such that the corresponding first sealing windows 425 and second sealing windows 426 together form a sealing cavity 128. The receiving portion of the second seal 222 includes a circumferential groove 446 and an axial notch 447. The circumferential groove 446 is located at the edge of each second sealing window 426, recessed from the outside to the inside and extending circumferentially to engage the circumferential flange 443 of the first seal 221. The axial notch 447 is located on the sidewall of the second seal 222, extending axially from the top of the second seal 222 to the bottom, and is located between the two second sealing windows 426. An axial notch 447 forms two ends 453 on the annular second seal 222, which respectively engage on opposite sides of the axial ridge 445 of the first seal 221. Thus, the circumferential flange 443 of the first seal 221 and the circumferential groove 446 of the second seal 222 engage to prevent axial displacement of the first seal 221 relative to the second seal 222. The axial ridge 445 of the first seal 221 and the axial notch 447 of the second seal 222 also engage to prevent rotation of the first seal 221 relative to the second seal 222.

[0049] The pair of sidewalls 455 of each first sealing window 425 are arranged substantially parallel, and each sidewall 455 extends radially at an inclination. The pair of sidewalls 456 of each second sealing window 426 are arranged substantially parallel and aligned with the pair of sidewalls 455 of the corresponding first sealing window 425. In this embodiment, the outer surface of the sidewall 456 of each second sealing window 426 abuts against the inner surface of the sidewall 455 of the corresponding first sealing window 425. This facilitates the processing and assembly of the first seal 221 and the second seal 222.

[0050] In some embodiments, the outer wall of the second seal 222 has several ribs 451. These ribs 451 facilitate the processing and manufacturing of the second seal 222, such as through demolding. Furthermore, since the second seal 222 is made of a soft material, these ribs 451 can deform when the first seal 221 and the second seal 222 are engaged to better seal the first seal 221 and the second seal.

[0051] In this application, the sealing device 120 has a certain thickness so that the sealing cavity 128 has a certain volume, allowing the fluid in the sealing cavity 128 to have a certain flow rate and preventing fluid interception. In this embodiment, the radial dimension of the sealing cavity 128 of the sealing device 120 is set to be no less than 60% of the diameter of the corresponding housing outlet 103. Since the sealing cavity 128 is disposed through the first sealing member 221 and the second sealing member 222, the radial dimension of the sealing cavity 128 is the total thickness of the sealing device 120. That is, the total thickness of the sealing device 120 is set to be no less than 60% of the diameter of the corresponding housing outlet 103. The greater the total thickness of the sealing device 120, the smaller the outer diameter of the lower valve core 113 will be, given that the outer diameter of the upper valve core 112 and the inner diameter of the housing 101 are constant. To ensure the size of the valve core channel 118, the thickness of the lower valve core 113 will also be smaller. Those skilled in the art can set the thickness of the sealing device 120 according to specific needs.

[0052] Each sealing cavity 128 of the sealing device 120 has an outer sealing opening 441 and an inner sealing opening 442 formed on the outer surface of the first sealing member 221 and the inner surface of the second sealing member 222, respectively. In this embodiment, each outer sealing opening 441 is formed by the outer edges of a pair of sidewalls 455 of each first sealing window 425, and is used to seal against the housing 101, and is disposed around the periphery of the housing outlet 103. Each inner sealing opening 442 is formed by the inner edges of a pair of sidewalls 456 of each second sealing window 426, and is used to seal against the valve core 111. As the valve core 111 rotates, the inner sealing opening 442 can be aligned with the valve core opening 116, or at least partially closed by the valve core blocking wall 217, thereby adjusting the opening degree of the inner sealing opening 442. The opening degree of the inner sealing opening 442 affects the flow rate from the valve core outlet 116 into the sealing cavity 128, and thus affects the flow rate discharged from the housing outlet 103. When the inner sealing opening 442 is aligned with the valve core opening 116, the opening degree of the inner sealing opening 442 is 100%, and the opening degree of the corresponding housing outlet 103 is also 100%. When the valve core blocking wall 217 blocks the inner sealing opening 442, the opening degree of the inner sealing opening 442 is 0%, and the opening degree of the corresponding housing outlet 103 is also 0%. Therefore, the adjustment range of the opening degree of the housing outlet 103 can be expanded from the central angle corresponding to the housing outlet 103 to the central angle corresponding to the inner sealing opening 442. During the process where the valve core outlet 116 is simultaneously connected to both housing outlets 103, the range of rotation angles that cause the opening degree of one of the housing outlets 103 to change also increases accordingly. In some embodiments, the circumferential dimensions of the connecting portion 452 and the axial notch 447 are set to be as small as possible to maximize the circumferential dimension of the inner sealing opening 442.

[0053] In this embodiment, the circumferential dimensions of the outer sealing opening 441 and the inner sealing opening 442 are approximately the same. Furthermore, the circumferential dimensions of the outer sealing opening 441 and the inner sealing opening 442 are the same as the circumferential dimension of the valve core outlet 116 of the valve core 111. Here, "approximately the same circumferential dimensions" means that the shapes of the outer sealing opening 441, the inner sealing opening 442, and the valve core outlet 116 match and their edges are roughly aligned. This achieves a better sealing effect without affecting the fluid flow area. To more precisely adjust the flow rate at the housing outlet, the circumferential dimensions of the inner sealing opening 442, the outer sealing opening 441, and the valve core outlet 116 can be set to the largest possible size. However, since the second seal 222 is located inside the first seal 221, when the circumferential dimension of the inner sealing opening 442 is too large, the circumferential dimensions of the connecting portion 452 and the axial notch 447 of the second seal 222 are smaller, and the corresponding circumferential dimension of the axial ridge 445 is also smaller. Those skilled in the art can set their circumferential dimensions according to specific needs. With the shape and size of the second sealing window 426 of the second seal 222 determined, the shape and size of the valve core outlet and the first sealing window 425 are then set according to the specific shape.

[0054] Those skilled in the art will understand that, in some embodiments, the dimensions of the outer sealing opening and the inner sealing opening do not need to be the same; it is only necessary to ensure that the total thickness of the sealing device and the circumferential dimension of the inner sealing opening are greater than the circumferential dimension of the valve core outlet.

[0055] Figures 5A-5C This illustrates the adjustment process of the opening degree of the proportional control valve's housing outlet during the rotation of the valve core 111. Housing outlet 103a and sealing cavity 128a are correspondingly arranged, and housing outlet 103b and sealing cavity 128b are correspondingly arranged. Figure 5A The diagram shows the state of the proportional control valve when housing outlet 103a is fully open and housing outlet 103b is closed. Figure 5B This shows the state of the proportional control valve when both housing outlet 103a and housing outlet 103b are open simultaneously. Figure 5C This shows the state of the proportional control valve when housing outlet 103a is closed and housing outlet 103b is fully open.

[0056] Figures 5A-5C Showing the proportional control valve edge Figure 2A The structure after BB is cut open. Valve core 111 can rotate counterclockwise from Figure 5A Passing through in sequence Figure 5B Rotate to Figure 5C And can rotate clockwise from Figure 5C Passing through in sequence Figure 5B Rotate to Figure 5A .

[0057] Specifically, such as Figure 5A As shown, the valve core 111 rotates to a position where the valve core outlet 116 is aligned with the sealing cavity 128a, so that the sealing cavity 128a is fully opened and the opening degree of the housing outlet 103a is 100%. The valve core blocking wall 217 blocks the sealing cavity 128b, so that the sealing cavity 128b is completely closed and the opening degree of the housing outlet 103b is 0. At this time, the valve core inlet 115 remains in fluid communication with the housing inlet 102, so that all the fluid entering the proportional control valve 100 from the housing inlet 102 flows out from the housing outlet 103a.

[0058] As the valve core 111 rotates counterclockwise, one end of the valve core blocking wall 217 (the downstream end in the rotation direction, hereinafter referred to as the downstream end 561) begins to move toward the sealing cavity 128a, causing the sealing cavity 128a to be partially closed, and the opening of the housing outlet 103a to begin to decrease. Meanwhile, one end of the valve core blocking wall 217 (the upstream end in the rotation direction, hereinafter referred to as the upstream end 562) moves past the connecting part 452 toward the sealing cavity 128b, causing the sealing cavity 128b to begin fluid communication with the valve core outlet 116, and the sealing cavity 128b to begin to open, increasing the opening of the housing outlet 103b. At this time, the valve core inlet 115 remains fluidly connected to the housing inlet 102, causing part of the fluid entering the proportional control valve 100 from the housing inlet 102 to flow out from the housing outlet 103a, and the other part to flow out from the housing outlet 103b, until the valve core 111 reaches the... Figure 5B The location shown.

[0059] like Figure 5B As shown, the valve core blocking wall 217 blocks a portion of the sealing cavity 128a, and the valve core outlet 116 opens another portion of the sealing cavity 128a, so that the sealing cavity 128a is not fully opened, and the opening degree of the housing outlet 103a is approximately 50%. Furthermore, the valve core outlet 116 opens a portion of the sealing cavity 128b, and the valve core blocking wall 217 blocks another portion of the sealing cavity 128b, so that the sealing cavity 128b is not fully opened either, and the opening degree of the housing outlet 103b is approximately 50%. At this time, the valve core inlet 115 remains in fluid communication with the housing inlet 102, so that part of the fluid entering the proportional control valve 100 from the housing inlet 102 flows out from the housing outlet 103a, and the other part flows out from the housing outlet 103b. As the valve core 111 rotates counterclockwise, the valve core 111 reaches... Figure 5C The location shown.

[0060] like Figure 5CAs shown, the downstream end 561 of the valve core blocking wall 217 begins to abut against the connecting part 452, causing the valve core blocking wall 217 to completely block the sealing cavity 128a, thus completely closing the sealing cavity 128a and making the opening degree of the housing outlet 103a approximately 0. Furthermore, the valve core outlet 116 and the sealing cavity 128b are aligned, causing the sealing cavity 128b to be fully opened and the opening degree of the housing outlet 103b approximately 100%. At this time, the valve core inlet 115 remains in fluid communication with the housing inlet 102, allowing all fluid entering the proportional control valve 100 from the housing inlet 102 to flow out from the housing outlet 103b.

[0061] Therefore, in the valve core 111 from such Figure 5A Rotate to the position shown. Figure 5C At the position shown, the opening of housing outlet 103a decreases from 100% to 0, and the opening of housing outlet 103b increases from 0 to 100%. With a constant fluid flow rate entering the proportional control valve 100 from the valve core inlet 115, the different openings of housing outlet 103a and housing outlet 103b will result in different outflow fluid flow rates.

[0062] In the proportional control valve of this application, the opening adjustment range of the housing outlet is expanded by setting the inner sealing opening and the valve core outlet to be larger than the size of the housing outlet. This allows for more precise adjustment of the opening of the housing outlet while keeping the valve core size and total rotation angle constant, thereby more precisely adjusting the flow ratio between the housing inlet and the housing outlet, as well as between each housing outlet.

[0063] The sealing device of this application comprises two interconnected parts. By making the two parts from different materials, both the sealing requirements and the strength requirements of the sealing device can be met.

[0064] Furthermore, the proportional control valve of this application, through the specific structure of the sealing device and valve core, enables a more precise flow range to be achieved without changing the external dimensions of the housing and the connecting pipes.

[0065] Although this disclosure has been described in conjunction with examples of the embodiments outlined above, various alternatives, modifications, variations, improvements, and / or substantially equivalents, whether known or now or soon to be foreseen, will likely be apparent to those skilled in the art. Therefore, the examples of embodiments of this disclosure set forth above are intended to be illustrative rather than restrictive. Various changes can be made without departing from the spirit or scope of this disclosure. Therefore, this disclosure is intended to include all known or previously developed alternatives, modifications, variations, improvements, and / or substantially equivalents. The technical effects and problems described in this specification are exemplary rather than restrictive. It should be noted that the embodiments described in this specification may have other technical effects and may solve other technical problems.

Claims

1. A proportional control valve, characterized in that... include: A housing (101) defining a mounting cavity (209) and having at least two housing outlets (103); A valve core (111) disposed within the mounting cavity (209) and rotatable about axis (i), the valve core (111) including a circumferential sidewall (214) extending circumferentially along the valve core (111), the circumferential sidewall (214) having a valve core blocking wall (217) and a valve core outlet (116), the valve core (111) being configured such that, as the valve core (111) rotates, the opening of the at least two housing outlets (103) can be adjusted via the valve core blocking wall (217) and the valve core outlet (116), thereby adjusting the flow ratio between the at least two housing outlets (103); and A sealing device (120) is connected to the inside of the housing (101) and located between the valve core (111) and the housing (101). The sealing device (120) includes at least two sealing cavities (128), which are correspondingly provided with the at least two housing outlets (103). Each sealing cavity (128) forms an inner sealing opening (442) on the inner surface of the sealing device (120). The opening degree of the inner sealing opening (442) is the same as the opening degree of the corresponding housing outlet (103). The sealing device (120) and the valve core (111) are configured such that the effective operating angle of the valve core (111) is greater than the sum of the central angles of the two housing outlets (103) of the at least two housing outlets (103), wherein the effective operating angle of the valve core (111) is the rotation angle that allows the valve core outlet (116) to communicate with both housing outlets (103) simultaneously and to change the opening of at least one housing outlet (103).

2. The proportional control valve according to claim 1, characterized in that: The dimensions of the inner sealing opening (442) and the valve core outlet (116) in the circumferential direction are both larger than the corresponding dimensions of each housing outlet (103).

3. The proportional control valve according to claim 1, characterized in that: Each of the sealing cavities (128) forms an outer sealing opening (441) on the outer surface of the sealing device (120), and the outer sealing opening (441), the inner sealing opening (442), and the valve core outlet (116) have the same corresponding dimensions in the circumferential direction.

4. The proportional control valve according to claim 1, characterized in that: The opening of each of the housing outlets (103) is 0 to 100%, and the radial dimension of the sealing cavity (128) is set to be not less than 60% of the diameter of the corresponding housing outlet (103).

5. The proportional control valve according to claim 1, characterized in that: The sealing device (120) includes a first sealing element (221) and a second sealing element (222) connected to each other. The second sealing element (222) is disposed on the inner side of the first sealing element (221). The first sealing element (221) is made of a hard material, and the second sealing element (222) is made of a soft material.

6. The proportional control valve according to claim 5, characterized in that: The first seal (221) is made of plastic material, and / or the second seal (222) is made of rubber material.

7. The proportional control valve according to claim 5, characterized in that: The first seal (221) has at least two first sealing windows (425), and the second seal (222) has at least two second sealing windows (426). The first sealing windows (425) and the second sealing windows (426) are fitted and aligned to form the at least two sealing cavities (128), wherein the second sealing window (426) has the inner sealing opening (442).

8. The proportional control valve according to claim 7, characterized in that: The first seal (221) and the second seal (222) are configured to be detachably engaged.

9. The proportional control valve according to claim 7, characterized in that: The first seal (221) has an inwardly protruding engaging portion, the engaging portion including a circumferential flange (443) and an axial ridge (445), wherein the circumferential flange (443) is disposed at the edge of at least one of the first sealing windows (425), and protrudes from the outside inward and extends circumferentially; the axial ridge (445) is disposed between the at least two of the first sealing windows (425), and protrudes from the outside inward and extends axially; and The second seal (222) has a receiving portion that mates with the engaging portion. The receiving portion includes a circumferential groove (446) and an axial notch (447). The circumferential groove (446) is disposed at the edge of the corresponding second sealing window (426) and is recessed from the outside inward and extends circumferentially to engage the circumferential flange (443). The axial notch (447) is disposed between the at least two second sealing windows (426) and extends axially through the second seal (222) such that the two ends of the second seal (222) at the axial notch (447) engage with the opposite sides of the axial ridge (445).

10. The proportional control valve according to claim 7, characterized in that: The sealing device (120) further includes an additional sealing strip (227) disposed on the outer wall of the first sealing member (221) around the first sealing window (425), and the additional sealing strip (227) is configured to abut against the inner wall of the housing (101).

11. The proportional control valve according to claim 1, characterized in that: The housing (101) has a housing inlet (102); The valve core (111) has a valve core inlet (115) and a valve core channel (118), the valve core channel (118) being in fluid communication with the valve core inlet (115) and the valve core outlet (116), and the circumferential dimension of the valve core inlet (115) is set such that as the valve core (111) rotates, the valve core inlet (115) remains in fluid communication with the housing inlet (102).

12. The proportional control valve according to claim 11, characterized in that: The valve core (111) includes an upper valve core (112) and a lower valve core (113), the valve core inlet (115) is disposed on the upper valve core (112), the lower valve core (113) has the circumferential sidewall (214), and the sealing device (120) is disposed around the circumferential sidewall (214) of the lower valve core (113).

13. The proportional control valve according to claim 1, characterized in that: The valve core (111) includes a rotating shaft (108) having the axis (i), wherein the rotating shaft (108) is rotatable by an actuator (110).

14. The proportional control valve according to claim 1, characterized in that: The valve core (111) also includes a valve core sealing strip (223), which is disposed on the outer wall of the circumferential sidewall (214) and is configured to abut against the inner wall of the sealing device (120).

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