Electric valve

Abstract

An electric valve comprises a valve body assembly, a valve rod and a control assembly, the control assembly is provided with a first cavity, the valve body assembly comprises a bearing component, the bearing component is provided with a first through hole, and at least part of the valve rod is located in the first through hole; the electric valve includes a first sealing member, an outer peripheral side of which can be in contact with a wall forming the first cavity; the bearing component comprises a bearing body and a pressing block, the pressing block and the bearing body are of a split structure, one side of the first sealing piece directly or indirectly abuts against the pressing block, and the other side of the first sealing piece directly or indirectly abuts against the bearing body. The first sealing piece is clamped through the pressing block and the bearing body, so that the first sealing piece is not prone to disengaging from the original position, and the risk that the first sealing piece is damaged by clamping or generates a squeezing gap is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management, in particular to an electric valve. Background Art

[0002] Electric valves can be used in thermal management systems to control the opening, closing, or direction of fluid channels. In related art, electric valves consist of a separate bearing housing and a control box. A portion of the bearing housing is radially sealed against the control box. When the control box is mated with the bearing housing, the seal between the two housings can become dislodged due to friction, resulting in pinching or "gap" in the seal. Utility Model Content

[0003] One object of the present application is to propose an electric valve capable of reducing the risk of a seal being dislodged.

[0004] A technical solution of the present application provides an electric valve, including a valve body assembly, a valve stem, and a control assembly, wherein the control assembly has a first cavity, the valve body assembly includes a bearing component, the bearing component has a first through hole, and at least part of the valve stem is located in the first through hole; the electric valve includes a first seal, and the outer peripheral side of the first seal can contact the wall forming the first cavity; the bearing component includes a bearing body and a pressure block, the pressure block and the bearing body have separate structures, one side of the first seal directly or indirectly abuts the pressure block, and the other side of the first seal directly or indirectly abuts the bearing body.

[0005] In the electric valve provided by the technical solution of this application, one side of the first seal directly or indirectly abuts the pressure block, and the other side of the first seal directly or indirectly abuts the bearing body. The pressure block and the bearing body clamp the first seal, making it difficult for the first seal to move out of position, thereby reducing the risk of the first seal being pinched or creating a "squeeze gap." The separate structure of the pressure block and the bearing body facilitates the installation of the first seal on the bearing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the electric valve of the present application is shown;

[0007] Figure 2 Shown Figure 1 Schematic diagram of the explosion structure of the electric valve shown;

[0008] Figure 3 Shown Figure 1 The schematic diagram of the structure of the control component of the electric valve shown is at an angle;

[0009] Figure 4 Shown Figure 1A schematic cross-sectional view of another exploded structure of the electric valve shown;

[0010] Figure 5 Shown Figure 1 The schematic diagram of the structure of the electric valve shown is at an angle;

[0011] Figure 6 Shown Figure 5 The cross-sectional structure diagram of the electric valve along line AA is shown;

[0012] Figure 7 Shown Figure 6 A schematic diagram of the exploded structure of a portion of the electric valve shown;

[0013] Figure 8 Shown Figure 7 A schematic cross-sectional view of a portion of the electric valve shown;

[0014] Figure 9 Shown Figure 8 A schematic diagram of a partially enlarged structure of a portion of the electric valve shown at position Z;

[0015] Figure 10 Shown Figure 9 A schematic diagram of a partially enlarged structure of a portion of the electric valve at position Q is shown;

[0016] Figure 11 Shown Figure 6 The schematic diagram of the partial enlarged structure of the electric valve at position X is shown;

[0017] Figure 12 Shown Figure 6 The schematic diagram of the local enlarged structure at position X when the electric valve is in the pressure relief state is shown;

[0018] Figure 13 A partially enlarged cross-sectional structural schematic diagram of another embodiment of the electric valve is shown.

[0019] Reference numerals

[0020] 100. Electric valve; 1. Valve body assembly; 7. Main valve body; 73. First mounting hole; 11. Valve cavity; 2. Valve stem; 3. Bearing component; 31. First through hole; 32. First groove; 34. Bearing body; 341. Small diameter portion; 342. Large diameter portion; 343. Inclined wall portion; 344. Step portion; 345. Third mounting hole; 35. Press block; 351. Lower side wall; 352. Second mounting hole; 4. Control assembly; 41. Housing; 42. First cavity; 420. Cavity; 421. Side wall portion; 422. Opening; 43. Second cavity; 44. Second through hole; 45. Circuit board; 5. First sealing member; 51. Sealing lip; 511. Fixed end; 512. Free end; 52. Base; 521. Rib; 8. Valve core; 101. Second sealing member. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In this document, relational terms such as "first" and "second" are used solely to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components. It should be noted that "limited connection" in this application includes snap connections, hinged connections, etc., and "fixed connection" in this application includes threaded connections, welding, bonding, vulcanization fixation, riveting, insert molding, interference fit, etc.

[0023] like Figure 1-Figure 7 As shown, the electric valve 100 includes a valve body assembly 1, a valve stem 2, and a control assembly 4; the control assembly 4 includes a shell 41, the shell 41 has a first cavity 42, and the first cavity 42 has an opening 422 on the side facing the valve body assembly 1; the valve body assembly 1 has a valve cavity 11, and at least part of the valve core 8 is located in the valve cavity 11; the valve body assembly 1 has a first through hole 31, one end of the first through hole 31 is connected to the first cavity 42, and the other end of the first through hole 31 is connected to the valve cavity 11; at least part of the valve stem 2 is located in the first through hole 31, one end of the valve stem 2 is transmission connected to the control assembly 4, and the other end of the valve stem 2 is transmission connected to the valve core 8.

[0024] like Figure 1-Figure 7As shown, the electric valve 100 includes a first sealing member 5 surrounding a first through-hole 31. The outer periphery of the first sealing member 5 is capable of contacting the wall forming the first cavity 42. The valve body assembly 1 includes a bearing component 3, which includes a bearing body 34 and a pressure block 35. The first through-hole 31 is located in the bearing component 3. The pressure block 35 is detachably connected to the bearing body 34. One side of the first sealing member 5 directly or indirectly abuts the pressure block 35, while the other side of the first sealing member 5 directly or indirectly abuts the bearing body 34. The pressure block 35 and the bearing body 34 clamp the first sealing member 5, making it difficult for the first sealing member 5 to be dislodged, thereby reducing the risk of the first sealing member 5 being "squeezed." Because the pressure block 35 and the bearing body 34 are separate structures, the first sealing member 5 can be easily installed on the bearing component 3. The sealing member can be first placed on the bearing body 34, and then the pressure block 35 can be installed, eliminating the need to expand the first sealing member 5. Furthermore, the pressure block 35 is detachably connected to the bearing body 34, making it easy to replace the first sealing member 5. It should be noted that “indirect contact” means that the two components are not in direct contact, but are sandwiched between other components.

[0025] At least part of the bearing component 3 is located in the first cavity 42. The wall forming the first cavity 42 includes a side wall portion 421. The side wall portion 421 surrounds the bearing component 3. The first sealing member 5 includes a base portion 52 and a sealing lip 51. The sealing lip 51 is an elastic member. The sealing lip 51 is connected to the radial outer side of the base portion 52. The sealing lip 51 can swing relative to the base portion 52. The outer side of the sealing lip 51 contacts the side wall portion 421. The first cavity 42 has an opening 422 on the side facing the valve body assembly 1. The sealing lip 51 extends from the base portion 52 in a direction close to the opening 422, so that the gap formed between the valve body assembly 1 and the control assembly 4 can be unidirectionally conducted from the first through hole 31 to the opening 422 side, thereby reducing the risk of damage to the control assembly 4 due to pressure. Specifically, the first cavity 42 includes a cavity 420 and a portion of the cavity occupied by the bearing component 3. Figure 6 For example, the cavity 420 is basically located above the bearing component 3. When the pressure in the cavity 420 is greater than the pressure in the outer space, and the difference between the pressure in the cavity 420 and the pressure in the outer space is greater than a threshold value, the sealing lip 51 separates from the outer shell 41, so that the cavity 420 is connected to the outer space, thereby generating a pressure relief effect. Further, the pressure in the cavity 420 when the sealing lip 51 is separated from the outer shell 41 is defined as the pressure relief pressure, and the pressure at which the outer shell 41 of the control component 4 is exploded is defined as the bursting pressure, and the pressure relief pressure is greater than the bursting pressure. When the pressure in the cavity 420 is lower than the pressure in the outer space, the sealing lip 51 and the outer shell 41 will be closer to each other, preventing impurities or fluids in the outer space from entering the cavity 420. The outer shell 41 of the control component 4 is made of plastic, and the outer shell 41 is formed by welding at least two parts, so the weld may become a weak point that is easy to explode. The sealing lip 51 can be made of rubber or plastic with a certain elasticity. Figure 4 、 Figure 6 As shown, the axial direction of the bearing component 3 and the axial direction of the electric valve 100 are both indicated by H in the figure.

[0026] like Figures 6-11 As shown, along the axial direction of the bearing component 3, one side of the base 52 directly or indirectly abuts against the pressure block 35, and the other side of the base 52 directly or indirectly abuts against the bearing body 34, so that the base 52 can be fixed, making it difficult for the sealing lip 51 to move out of its original position, reducing the risk of the sealing lip 51 generating a "gap", and thus preventing the sealing lip 51 from blocking the gap between the bearing component 3 and the control component 4.

[0027] This unidirectional conduction technology is particularly suitable for electric valves 100 in which refrigerant flows through valve chamber 11, i.e., when valve chamber 11 of electric valve 100 is connected to a refrigerant system. This is because the pressure within the refrigerant system is generally greater than 0.8 MPa, resulting in a significant pressure difference with the outside atmosphere or the external space. Furthermore, the refrigerant can be R22, R1234a, R744, etc.

[0028] like Figure 2 、 Figure 7 As shown, the valve body assembly 1 includes a main valve body 7, a valve chamber 11 is located in the main valve body 7, and the bearing component 3 is detachably connected to the main valve body 7. Therefore, the main valve body 7 can be replaced, making the electric valve 100 more versatile. The main valve body 7 has a first mounting hole 73. Along the axial direction of the bearing component 3, the first mounting hole 73 is aligned with the second mounting hole 352 of the pressure block 35. The first mounting hole 73 is also aligned with the third mounting hole 345 of the bearing component 3. In this way, the same screw 75 can be passed through the second mounting hole 352 and the third mounting hole 345 to secure the pressure block 35, the bearing component 3, and the main valve body 7, thereby reducing the number of parts.

[0029] The first portion of the bearing component 3 protrudes from the outer surface of the main valve body 7. The side wall portion 421 extends radially along the bearing component 3. At least a portion of the bearing component 3 has a clearance fit with the side wall portion 421. This facilitates radial positioning between the bearing component 3 and the control assembly 4, thereby ensuring proper docking of the valve stem 2 and the control assembly 4 during assembly of the electric valve 100. In addition, a radial seal is employed between the side wall portion 421 and the bearing component 3. Compared to end face sealing, radial sealing makes it easier to maintain the distance between the side wall portion 421 and the groove, thereby ensuring that the compression degree of the first sealing member 5 is within a preset range, thereby ensuring that the pressure relief pressure is within a preset range.

[0030] like Figure 4 、 Figure 6As shown, the housing 41 has a second chamber 43, which is substantially sealed from the external space and includes a circuit board 45, a motor, and a drive shaft. The circuit board 45 and the motor are both located in the second chamber 43. The housing 41 has a second through hole 44, through which the first chamber 42 communicates with the second chamber 43. A portion of the drive shaft is located in the second through hole 44, and the drive shaft is in driving connection with the valve stem 2. When the pressure in the first chamber 42 and the pressure in the second chamber 43 exceed a threshold, the fluid in the first chamber 42 will rush into the second chamber 43, potentially causing the housing 41 to explode due to excessive internal pressure.

[0031] like Figures 6-11 As shown, in some technical solutions, the outer periphery of the bearing body 34 includes a small diameter portion 341 and a large diameter portion 342, and the small diameter portion 341 and the large diameter portion 342 are arranged along the axial direction of the bearing component 3. The small diameter portion 341 is farther away from the valve cavity 11 than the large diameter portion 342. At least a portion of the base 52 is located on the outer periphery of the small diameter portion 341. The radial inner side of the base 52 contacts or has a clearance fit with the outer side of the small diameter portion 341, so that the small diameter portion 341 can radially position the first sealing member 5. In addition, Figure 6 For example, the diameter of the bearing component 3 structure located above the small-diameter portion 341 is smaller than or equal to the small-diameter portion 341. When assembling the electric valve 100, the first seal 5 is first sleeved from top to bottom around the outer periphery of the small-diameter portion 341, and then the pressure block 35 is pressed from top to bottom onto the first seal 5, and then the pressure block 35 is fixed to the bearing body 34. Since the diameter of the bearing component 3 structure located above the small-diameter portion 341 is smaller than the small-diameter portion 341, the first seal 5 does not need to be enlarged in order to be installed on the bearing component 3, which facilitates installation of the first seal 5 and reduces the risk of damage to the first seal 5.

[0032] The bearing body 34 also includes a step portion 344, the inner side of which abuts the small-diameter portion 341 and the outer side of which abuts the large-diameter portion 342, with the step portion 344 facing the control assembly 4. The pressure block 35 includes a lower sidewall 351, which faces the step portion 344 along the axial direction of the bearing component 3. One side of the base 52 abuts the lower sidewall 351 of the pressure block 35, while the other side of the base 52 abuts the step portion 344. A portion of the lower sidewall 351 abuts the bearing body 34. This abutment of the lower sidewall 351 with the bearing body 34 limits the degree of compression of the first seal 5 after installation.

[0033] like Figures 8-10As shown, in some technical solutions, the sealing lip 51 is in the form of a thin sheet as a whole. The end of the sealing lip 51 connected to the base 52 is defined as the fixed end 511, and the end of the sealing lip 51 away from the base 52 is defined as the free end 512. In the cross-section of the sealing lip 51, the fixed end 511 is thicker than the free end 512, making the free end 512 more easily bent and deformed. The sealing lip 51 can be made of polytetrafluoroethylene (PTFE), which is easier to process fine structures than rubber, resulting in smaller dimensional tolerances for the first sealing element 5, more precise deflection of the sealing lip 51, and thus more accurate pressure relief pressure. Specifically, the sealing lip 51 can be formed by machining.

[0034] The large-diameter portion 342 includes an inclined wall portion 343. Along the axial direction of the bearing component 3, the inclined wall portion 343 abuts the step portion 344. The radial dimension of the inclined wall portion 343 is smaller than the radial dimension of the side wall portion 421. The side wall portion 421 extends axially along the bearing component 3. An accommodating cavity is formed between the inclined wall portion 343 and the side wall portion 421. The sealing lip 51 is positioned in the accommodating cavity, with a gap provided between the sealing lip 51 and the inclined wall portion 343. This gap between the sealing lip 51 and the inclined wall portion 343 provides sufficient space for movement, thereby ensuring unidirectional conduction. Furthermore, the inclined wall portion 343 prevents the sealing lip 51 from being cut. Specifically, the inclined wall portion 343 is tapered overall, with its radial dimension gradually decreasing toward the step portion 344.

[0035] like Figures 8-11 As shown, the base 52 includes at least one rib 521. The rib 521 surrounds the first through hole 31 and protrudes toward the bearing body 34. Specifically, the rib 521 protrudes toward the step portion 344 and abuts against the bearing body 34. The rib 521 can enhance the sealing effect and the fixing effect. In other embodiments, the rib 521 can also protrude toward the pressure block 35 and abut against the pressure block 35. In the cross-section of the base 52, the radial dimension of the base 52 is greater than the axial dimension of the base 52, so that the clamping area of ​​the base 52 is relatively larger and the base 52 is clamped more firmly.

[0036] like Figure 13 As shown, in some technical solutions, the electric valve 100 further includes a second seal 101, which is sandwiched between the pressure block 35 and the first seal 5. The second seal 101 is an elastic member. The hardness of the first seal 5 is greater than that of the second seal 101. The second seal 101 abuts and seals against the first seal 5, and the second seal 101 abuts and seals against the pressure block. The second seal 101 can enhance the seal between the base 52 and the bearing component 3 and compensate for installation tolerances. Specifically, the second seal is an O-ring, and the second seal 101 is made of rubber.

[0037] It should be noted that the above embodiments are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, ordinary technicians in this field should understand that technicians in the relevant technical field can still modify or replace the present application with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present application should be included in the scope of protection of the present application.

Claims

1. An electric valve, characterized in that: The electric valve comprises a valve body assembly (1), a valve stem (2), and a control assembly (4), wherein the control assembly (4) has a first cavity (42), the valve body assembly (1) comprises a bearing component (3), the bearing component (3) has a first through hole (31), and at least part of the valve stem (2) is located in the first through hole (31); the electric valve comprises a first sealing member (5), the outer peripheral side of the first sealing member (5) can contact the wall forming the first cavity (42); the bearing component (3) comprises a bearing body (34) and a pressure block (35), the pressure block (35) and the bearing body (34) are separate structures, one side of the first sealing member (5) directly or indirectly abuts against the pressure block (35), and the other side of the first sealing member (5) directly or indirectly abuts against the bearing body (34).

2. The electric valve according to claim 1, characterized in that At least part of the bearing component (3) is located in the first cavity (42), the first sealing member (5) surrounds the first through hole (31), and the wall forming the first cavity (42) includes a side wall portion (421), and the side wall portion (421) surrounds the bearing component (3). The first sealing member (5) includes a base portion (52) and a sealing lip (51), and the sealing lip (51) is an elastic member, and the sealing lip (51) is connected to the radial outer side of the base portion (52), and the outer side of the sealing lip (51) can contact the side wall portion (421); along the axial direction of the bearing component (3), one side of the base portion (52) directly or indirectly abuts the pressure block (35), and the other side of the base portion (52) directly or indirectly abuts the bearing body (34).

3. The electric valve according to claim 2, characterized in that In a cross section of the base (52), a radial dimension of the base (52) is greater than an axial dimension of the base (52).

4. The electric valve according to claim 2, characterized in that: The base (52) includes at least one rib (521), which surrounds the first through hole (31). Along the axial direction of the bearing component (3), the rib (521) protrudes toward the bearing component, and the rib (521) abuts against the bearing component (3); and / or, the rib (521) protrudes toward the pressure block (35), and the rib (521) abuts against the pressure block (35).

5. The electric valve according to any one of claims 2 to 4, characterized in that: The outer periphery of the bearing body (34) includes a small diameter portion (341) and a large diameter portion (342), and the small diameter portion (341) and the large diameter portion (342) are arranged along the axial direction of the bearing component (3); the electric valve includes a valve core (8), and the valve body assembly (1) has a valve cavity (11), at least part of the valve core (8) is located in the valve cavity (11), the small diameter portion (341) is away from the valve cavity (11) relative to the large diameter portion (342), and the radial inner side of the base (52) is in contact with or clearance fit with the outer side of the small diameter portion (341).

6. The electric valve according to claim 5, characterized in that: The bearing body (34) further includes a step portion (344), the inner side of the step portion (344) is adjacent to the small diameter portion (341), the outer side of the step portion (344) is adjacent to the large diameter portion (342), and the step portion (344) faces the control component (4); the pressure block (35) includes a lower side wall (351), and the lower side wall (351) faces the step portion (344). Along the axial direction of the bearing component (3), one side of the base (52) abuts against the lower side wall (351) of the pressure block (35), and the other side of the base (52) abuts against the step portion (344), and a portion of the lower side wall (351) abuts against the bearing body (34).

7. The electric valve according to claim 5, characterized in that One end of the first through hole (31) is connected to the first cavity (42), and the other end of the first through hole (31) is connected to the valve cavity (11); the sealing lip (51) can swing relative to the base (52), and the outer side of the sealing lip (51) can contact and separate from the side wall portion (421); the first cavity (42) has an opening (422) on the side facing the valve body assembly (1), and the sealing lip (51) extends from the base (52) in a direction close to the opening (422).

8. The electric valve according to claim 7, characterized in that The end of the sealing lip (51) connected to the base (52) is defined as a fixed end (511), and the end of the sealing lip (51) away from the base (52) is defined as a free end (512). In the cross-section of the sealing lip (51), the thickness of the fixed end (511) is greater than that of the free end (512).

9. The electric valve according to claim 6, characterized in that: The large diameter portion (342) includes an inclined wall portion (343), and along the axial direction of the bearing component (3), the inclined wall portion (343) is adjacent to the step portion (344), the radial dimension of the inclined wall portion (343) is smaller than the radial dimension of the side wall portion (421), and the side wall portion (421) extends along the axial direction of the bearing component (3). An accommodating cavity is formed between the inclined wall portion (343) and the side wall portion (421), and the sealing lip (51) is located in the accommodating cavity, and a gap is set between the sealing lip (51) and the inclined wall portion (343).

10. The electric valve according to claim 6, characterized in that The electric valve further comprises a second sealing member (101), which is sandwiched between the pressure block (35) and the first sealing member (5), the second sealing member (101) being an elastic member, the hardness of the first sealing member (5) being greater than the hardness of the second sealing member (101), the second sealing member (101) being in contact with the first sealing member (5) and being sealed, and the second sealing member (101) being in contact with the pressure block and being sealed.

11. The electric valve according to claim 6, characterized in that One end of the first through hole (31) is connected to the first cavity (42), and the other end of the first through hole (31) is connected to the valve cavity (11); the sealing lip (51) can swing relative to the base (52), and the outer side of the sealing lip (51) can contact and separate from the side wall portion (421); the first cavity (42) has an opening (422) on the side facing the valve body assembly (1), and the sealing lip (51) extends from the base (52) in a direction close to the opening (422).

12. The electric valve according to any one of claims 2-4 and 6-10, characterized in that: The valve body assembly (1) includes a main valve body (7), a valve cavity (11) is located in the main valve body (7), the pressure block (35) is detachably connected to the bearing body (34), the bearing component (3) is detachably connected to the main valve body (7), and the main valve body (7) has a first mounting hole (73), along the axial direction of the bearing component (3), the first mounting hole (73) is aligned with the second mounting hole (352) of the pressure block (35), and the first mounting hole (73) is aligned with the third mounting hole (345) of the bearing component (3).

13. The electric valve according to claim 5, characterized in that The valve body assembly (1) includes a main valve body (7), a valve cavity (11) is located in the main valve body (7), the pressure block (35) is detachably connected to the bearing body (34), the bearing component (3) is detachably connected to the main valve body (7), and the main valve body (7) has a first mounting hole (73), along the axial direction of the bearing component (3), the first mounting hole (73) is aligned with the second mounting hole (352) of the pressure block (35), and the first mounting hole (73) is aligned with the third mounting hole (345) of the bearing component (3).

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