CN220556052U - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN220556052U CN220556052U CN202322142786.8U CN202322142786U CN220556052U CN 220556052 U CN220556052 U CN 220556052U CN 202322142786 U CN202322142786 U CN 202322142786U CN 220556052 U CN220556052 U CN 220556052U
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- sealing
- electronic expansion
- conical surface
- gasket
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- 238000007789 sealing Methods 0.000 claims abstract description 151
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 14
- 238000003754 machining Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001595 flow curve Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The utility model provides an electronic expansion valve, which comprises a valve seat part, a sealing gasket and a valve needle part, wherein the sealing gasket is arranged in the valve seat part and is provided with a valve port; the valve needle part is movably arranged in the valve seat part, a sealing ring line for sealing is arranged between the valve needle part and the valve seat part, the radius of the sealing ring line is R1, an upper cavity is arranged on one side of the valve needle part, which is away from the sealing gasket, a balance channel is arranged in the valve needle part, and the valve port is communicated with the upper cavity through the balance channel; the end part of the valve needle part is provided with an annular sealing surface surrounding the valve port, the annular sealing surface is used for being in sealing fit with the sealing gasket, and the inner diameter of the annular sealing surface is R2, and the outer diameter of the annular sealing surface is R3; wherein R2 is more than R1 and less than R3, and R3-R2 is less than or equal to 0.1mm. In the scheme, the single-side width of the annular sealing surface is limited within 0.1mm, so that after the valve port is closed, the consistency of fluid pressure received by two ends of the valve needle part is ensured, the internal balance of the electronic expansion valve is truly realized, the influence of the fluid pressure on the valve needle part is reduced, and the valve opening performance is improved.
Description
Technical Field
The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve.
Background
In order to reduce the influence of fluid pressure on a switching valve port in an electronic expansion valve, in some schemes, a balance channel is arranged in a valve needle part, the valve port is communicated with a cavity of the valve needle part, which is far away from the valve port, through the balance channel, so that the fluid pressure born by two ends of the valve needle part is equal, and the fluid pressure born by the valve needle part depends on the area of fluid acting force born by two ends of the valve needle part. In order to reduce the pressure difference between both ends of the needle portion, it is necessary to make the areas of the fluid force applied to both ends of the needle portion as uniform as possible.
In the existing electronic expansion valve, the size of a sealing surface of a valve needle part for sealing a valve port is large, so that an actual sealing area of a sealing position of the valve port is large, the stressed area of the valve needle part towards one end of the valve port after closing the valve is difficult to determine, the pressure difference at two ends of the valve needle part is large, the pressure balance at two ends of the valve needle part is influenced, and the valve opening performance is influenced.
Disclosure of Invention
The utility model provides an electronic expansion valve, which aims to solve the problems that the valve needle part in the electronic expansion valve in the prior art is large in sealing area, pressure balance is not easy to realize, and valve opening performance is affected.
In order to solve the above problems, the present utility model provides an electronic expansion valve comprising: a valve seat portion; the sealing gasket is arranged in the valve seat part and is provided with a valve port; the valve needle part is movably arranged in the valve seat part, a sealing ring line for sealing is arranged between the valve needle part and the valve seat part, the radius of the sealing ring line is R1, an upper cavity is arranged on one side of the valve needle part, which is away from the sealing gasket, a balance channel is arranged in the valve needle part, and the valve port is communicated with the upper cavity through the balance channel; the end part of the valve needle part is provided with an annular sealing surface surrounding the valve port, the annular sealing surface is used for being in sealing fit with the sealing gasket, and the inner diameter of the annular sealing surface is R2, and the outer diameter of the annular sealing surface is R3; wherein R2 is more than R1 and less than R3, and R3-R2 is less than or equal to 0.1mm.
Further, R3-R2 is more than or equal to 0.02mm and less than or equal to 0.04mm.
Further, 0.1< R1 (R3-R2) <1.8.
Further, the annular sealing surface is a plane or an arc surface, and the surface of the sealing gasket matched with the annular sealing surface is a plane.
Further, the end of the valve needle portion has an inner conical surface, an inner edge of the inner conical surface coincides with an inner edge of the annular sealing surface, and the inner conical surface is located on a side of the annular sealing surface facing away from the sealing gasket.
Further, the included angle between the inner conical surface and the radial direction of the valve port is A, and A is more than or equal to 5 degrees and less than or equal to 40 degrees.
Further, the end of the valve needle portion has an outer conical surface, an inner edge of the outer conical surface coincides with an outer edge of the annular sealing surface, and the outer conical surface is located on a side of the annular sealing surface facing away from the gasket.
Further, the included angle between the external conical surface and the radial direction of the valve port is B, and B is more than or equal to 15 degrees and less than or equal to 45 degrees.
Further, the valve seat part comprises a valve seat main body, a guide sleeve and a sealing gasket, wherein the sealing gasket is fixed in the valve seat main body, and the electronic expansion valve further comprises a sealing ring; the outer wall of the valve needle part is provided with a sealing groove, the sealing ring is positioned in the sealing groove, and a sealing loop is formed at the contact position of the outer wall of the sealing ring and the inner wall of the guide sleeve; or the inner wall of the guide sleeve is provided with a sealing groove, the sealing ring is positioned in the sealing groove, and a sealing ring line is formed at the contact position of the inner wall of the sealing ring and the outer wall of the valve needle part.
Further, the end portion of the valve needle portion has a first tapered surface and a second tapered surface which are sequentially arranged, the first tapered surface is located on the inner side of the annular sealing surface, the second tapered surface is located on the inner side of the first tapered surface, taper angles of the first tapered surface and the second tapered surface are different, wherein under the condition that the valve port is closed, the second tapered surface is located in the valve port, and a part of the first tapered surface is located in the valve port.
Further, the sealing gasket is made of elastic materials, the sealing gasket is located in the groove of the valve seat part, the valve seat part is provided with a limiting ring, the limiting ring is riveted with the end face of the sealing gasket, and the inner wall of the valve port is provided with a conical surface for adjusting flow.
Further, the valve needle part comprises a valve head, a screw rod, a bearing, a bushing and an elastic piece, wherein the valve head is provided with an annular sealing surface, one end of the screw rod penetrates into a cavity of the valve head, the bearing is positioned between the screw rod and the inner wall of the valve head, and the bearing, the bushing, the elastic piece and the bottom wall of the valve head are sequentially abutted; the valve head is provided with a first channel, the bushing is provided with a second channel, the screw is provided with a third channel, the valve port, the first channel, the second channel, the third channel and the upper cavity are sequentially communicated, and the first channel, the second channel and the third channel form a balance channel.
By applying the technical scheme of the utility model, the electronic expansion valve comprises a valve seat part, a sealing gasket and a valve needle part, wherein the sealing gasket is arranged in the valve seat part and is provided with a valve port; the valve needle part is movably arranged in the valve seat part, a sealing ring line for sealing is arranged between the valve needle part and the valve seat part, the radius of the sealing ring line is R1, an upper cavity is arranged on one side of the valve needle part, which is away from the sealing gasket, a balance channel is arranged in the valve needle part, and the valve port is communicated with the upper cavity through the balance channel; the end part of the valve needle part is provided with an annular sealing surface surrounding the valve port, the annular sealing surface is used for being in sealing fit with the sealing gasket, and the inner diameter of the annular sealing surface is R2, and the outer diameter of the annular sealing surface is R3; wherein R2 is more than R1 and less than R3, and R3-R2 is less than or equal to 0.1mm. In this scheme, seal between valve seat portion and the needle portion through sealed loop wire, communicate valve port and upper chamber through balanced passageway, owing to limited the unilateral width of annular sealing face in 0.1mm, the size of the sealing ring that forms in fact is very little with the dimensional error of sealed loop wire after closing the valve port like this, thereby make the valve needle portion both ends area error of bearing very little, the fluid pressure that has guaranteed valve needle portion both ends to receive is unanimous like this, really realized the interior balance of electronic expansion valve, greatly reduced the influence of fluid pressure to valve needle portion, make valve needle portion can smoothly open the valve port, the valve opening performance has been improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
fig. 1 shows a schematic structural diagram of an electronic expansion valve according to an embodiment of the present utility model;
FIG. 2 illustrates a partial enlarged view of an electronic expansion valve in a sealed position provided by an embodiment of the present utility model;
fig. 3 shows an enlarged partial view of the valve needle portion of fig. 2.
Wherein the above figures include the following reference numerals:
10. a valve seat portion; 11. an upper chamber; 12. a valve seat body; 14. a limiting ring; 20. a sealing gasket; 21. a valve port; 30. a valve needle portion; 31. balance channel; 32. a valve head; 321. an annular sealing surface; 322. an inner conical surface; 323. an outer conical surface; 324. a first conical surface; 325. a second conical surface; 33. a screw; 34. a bearing; 35. a bushing; 36. an elastic member; 40. and (3) sealing rings.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1 to 3, an embodiment of the present utility model provides an electronic expansion valve including: a valve seat portion 10; a gasket 20 provided in the valve seat portion 10, the gasket 20 having a valve port 21; a valve needle portion 30 movably disposed in the valve seat portion 10, a seal ring line for sealing being provided between the valve needle portion 30 and the valve seat portion 10, the seal ring line having a radius R1, an upper chamber 11 being provided on a side of the valve needle portion 30 facing away from the gasket 20, a balance passage 31 being provided in the valve needle portion 30, the balance passage 31 communicating the valve port 21 and the upper chamber 11; the end of the valve needle portion 30 has an annular sealing surface 321 surrounding the valve port 21, the annular sealing surface 321 being for sealing engagement with the gasket 20, the annular sealing surface 321 having an inner diameter R2 and an outer diameter R3; wherein R2 is more than R1 and less than R3, and R3-R2 is less than or equal to 0.1mm. The upper chamber 11 may also be understood as a chamber body of the side of the sealing ring facing away from the valve port 21.
In this scheme, seal between valve needle portion 10 and the valve needle portion 30 through sealed loop line, communicate valve port 21 and upper chamber 11 through balance channel 31, owing to limited the unilateral width of annular seal face 321 in 0.1mm, after closing valve port 21 like this, the size of the sealing ring that actually forms is very little with the dimensional error of sealed loop line, thereby make valve needle portion 30 both ends area error very little, the fluid pressure that receives at valve needle portion 30 both ends is unanimous like this, really realized the internal balance of electronic expansion valve, greatly reduced the influence of fluid pressure to valve needle portion 30, make valve needle portion 30 can smoothly open valve port 21, the valve opening performance has been improved.
Wherein the annular sealing surface 321 and the sealing ring line are coaxially arranged, and the relationship of R1, R2 and R3 is preferably r1= (r3+r2)/2.
Further, R3-R2 is more than or equal to 0.02mm and less than or equal to 0.04mm. Under the condition that the machining can ensure the precision, the single-side width of the annular sealing surface 321 can be made to be as small as possible, so that the size of a sealing ring actually formed after the annular sealing surface 321 seals the valve port 21 is more approximate or almost equal to the size of a sealing ring line, the pressure difference between two ends of the valve needle part 30 is further reduced, and the valve opening performance is improved.
In this embodiment, 0.1mm 2 <R1*(R3-R2)<1.8mm 2 . The R1, R2 and R3 are limited in the range, so that the electronic expansion valve has good valve port 21 sealing performance, meanwhile, internal balance is realized, and good valve opening performance is realized. For the electronic expansion valves with different specifications, the specific dimensions of R1, R2 and R3 are designed according to the requirements, and the relationship is satisfied.
The annular sealing surface 321 may be a plane or an arc surface, and the surface of the sealing gasket 20 matching with the annular sealing surface 321 is a plane, which may be an arc surface.
As shown in fig. 2 and 3, the end of the needle portion 30 has an inner tapered surface 322, the inner edge of the inner tapered surface 322 and the inner edge of the annular sealing surface 321 overlap, and the inner tapered surface 322 is located on the side of the annular sealing surface 321 facing away from the gasket 20. The inner edge of the annular sealing surface 321 is machined by machining of the inner conical surface 322 to precisely define the inner diameter dimension of the annular sealing surface 321.
Specifically, the angle between the inner conical surface 322 and the radial direction of the valve port 21 is A, and A is 5 DEG-40 deg. Thus, the machining precision of the inner edge of the annular sealing surface 321 is ensured, and the realizability of the cutter in actual machining is also met.
As shown in fig. 2 and 3, the end of the needle portion 30 has an outer conical surface 323, the inner edge of the outer conical surface 323 coincides with the outer edge of the annular sealing surface 321, and the outer conical surface 323 is located on the side of the annular sealing surface 321 facing away from the gasket 20. The outer edge of annular sealing surface 321 is machined by machining of outer conical surface 323 to precisely define the outer diameter dimension of annular sealing surface 321. Moreover, in the scheme, the conical surface is adopted (namely, chamfering) for processing, and compared with the fillet processing, the processing difficulty is reduced.
Specifically, the angle between the outer conical surface 323 and the radial direction of the valve port 21 is B, and B is 15 DEG.ltoreq.B.ltoreq.45 deg. Thus, the machining precision of the outer edge of the annular sealing surface 321 is ensured, and the realizability of the cutter in actual machining is also met.
As shown in fig. 1, the valve seat portion 10 includes a valve seat body 12 and a guide sleeve, the gasket 20 is fixed in the valve seat body 12, and the electronic expansion valve further includes a seal ring 40; the outer wall of the valve needle part 30 is provided with a sealing groove, the sealing ring 40 is positioned in the sealing groove, and a sealing loop is formed at the contact position of the outer wall of the sealing ring 40 and the inner wall of the guide sleeve; or, the inner wall of the guide sleeve is provided with a sealing groove, the sealing ring 40 is positioned in the sealing groove, and a sealing loop is formed at the contact position of the inner wall of the sealing ring 40 and the outer wall of the valve needle part 30.
With the adoption of the arrangement, the guide sleeve can guide the movement of the valve needle part 30, so that the valve needle part 30 moves stably, and the stability of the switching valve and the sealing effect of closing the valve port 21 are ensured. The guide sleeve and the valve needle part 30 are well sealed through the sealing ring 40, so that internal leakage of the electronic expansion valve is avoided. The specific installation location of the seal ring 40 is selected according to actual needs.
As shown in fig. 2, the end of the valve needle 30 has a first tapered surface 324 and a second tapered surface 325 that are sequentially provided, the first tapered surface 324 is located inside the annular sealing surface 321, the second tapered surface 325 is located inside the first tapered surface 324, and taper angles of the first tapered surface 324 and the second tapered surface 325 are different, wherein, when the valve port 21 is closed, the second tapered surface 325 is located inside the valve port 21, and a part of the first tapered surface 324 is located inside the valve port 21. The first conical surface 324 and the second conical surface 325 can play a role in flow regulation, and different flow curves can be realized by adjusting the first conical surface 324, the second conical surface 325 and the angle, so as to meet the use requirement of the electronic expansion valve.
As shown in fig. 1, the gasket 20 is made of an elastic material, so that the sealing effect is good; the sealing gasket 20 is positioned in the groove of the valve seat part 10, the valve seat part 10 is provided with the limiting ring 14, and the limiting ring 14 is riveted with the end face of the sealing gasket 20, so that the sealing gasket 20 is reliably fixed; the inner wall of the valve port 21 is provided with a conical surface for adjusting the flow, so that a specific flow curve of the electronic expansion valve in the valve opening and closing process can be realized, and the use requirement is met.
In this embodiment, the electronic expansion valve further includes a first connection pipe and a second connection pipe, the first connection pipe is communicated with the valve port 21, the second connection pipe is communicated with the cavity in the valve seat portion 10, and the first connection pipe is perpendicular to the second connection pipe. The first connection pipe and the second connection pipe are not communicated when the valve port 21 is closed, and are communicated when the valve port 21 is opened.
Specifically, the valve needle portion 30 includes a valve head 32, a screw 33, a bearing 34, a bush 35 and an elastic member 36, the valve head 32 has an annular sealing surface 321, one end of the screw 33 penetrates into a cavity of the valve head 32, the bearing 34 is located between the screw 33 and an inner wall of the valve head 32, and the bearing 34, the bush 35, the elastic member 36 and a bottom wall of the valve head 32 are sequentially abutted; wherein the valve head 32 has a first passage, the bush 35 has a second passage, the screw 33 has a third passage, the valve port 21, the first passage, the second passage, the third passage, and the upper chamber 11 are sequentially communicated, and the first passage, the second passage, and the third passage constitute the balance passage 31. By the arrangement, the valve head 32 has buffering effect when the valve port 21 is opened and closed, so that the impact of the valve head 32 is avoided; by the arrangement of the first channel, the second channel and the third channel, the fluid pressure in the valve port 21 and the upper cavity 11 are equal.
In the above scheme, the valve seat part 10 and the valve needle part 30 are sealed through the sealing loop, the valve port 21 and the upper cavity 11 are communicated through the balance channel 31, and the single-side width of the annular sealing surface 321 is limited within 0.1mm, so that after the valve port 21 is closed, the size error of the actually formed sealing ring and the size error of the sealing loop are small, so that the stress area error of the two ends of the valve needle part 30 is small, the consistency of the fluid pressure born by the two ends of the valve needle part 30 is ensured, the internal balance of the electronic expansion valve is truly realized, the influence of the fluid pressure on the valve needle part 30 is greatly reduced, the valve port 21 can be smoothly opened by the valve needle part 30, and the valve opening performance is improved.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.
Claims (12)
1. An electronic expansion valve, comprising:
a valve seat part (10);
a gasket (20) provided in the valve seat portion (10), the gasket (20) having a valve port (21);
a valve needle part (30) movably arranged in the valve seat part (10), a sealing ring line used for sealing is arranged between the valve needle part (30) and the valve seat part (10), the radius of the sealing ring line is R1, an upper cavity (11) is arranged on one side of the valve needle part (30) away from the sealing gasket (20), a balance channel (31) is arranged in the valve needle part (30), and the balance channel (31) is used for communicating the valve port (21) with the upper cavity (11);
the end part of the valve needle part (30) is provided with an annular sealing surface (321) surrounding the valve port (21), the annular sealing surface (321) is used for being in sealing fit with the sealing gasket (20), and the inner diameter of the annular sealing surface (321) is R2, and the outer diameter of the annular sealing surface is R3;
wherein R2 is more than R1 and less than R3, and R3-R2 is less than or equal to 0.1mm.
2. The electronic expansion valve of claim 1, wherein 0.02mm is equal to or less than R3-R2 is equal to or less than 0.04mm.
3. The electronic expansion valve of claim 1, wherein 0.1< R1 x (R3-R2) <1.8.
4. The electronic expansion valve according to claim 1, wherein the annular sealing surface (321) is a plane or an arc surface, and the surface of the gasket (20) that cooperates with the annular sealing surface (321) is a plane.
5. The electronic expansion valve according to claim 1, characterized in that the end of the valve needle part (30) has an inner conical surface (322), the inner edge of the inner conical surface (322) and the inner edge of the annular sealing surface (321) coincide, and the inner conical surface (322) is located on the side of the annular sealing surface (321) facing away from the gasket (20).
6. The electronic expansion valve of claim 5, wherein the angle between the inner conical surface (322) and the radial direction of the valve port (21) is a,5 ° -a ∈40 °.
7. The electronic expansion valve according to claim 1, characterized in that the end of the valve needle part (30) has an outer conical surface (323), the inner edge of the outer conical surface (323) and the outer edge of the annular sealing surface (321) coincide, and the outer conical surface (323) is located on the side of the annular sealing surface (321) facing away from the sealing gasket (20).
8. The electronic expansion valve according to claim 7, characterized in that the angle between the outer conical surface (323) and the radial direction of the valve port (21) is B,15 ° or more B or less 45 °.
9. The electronic expansion valve according to claim 1, wherein the valve seat portion (10) comprises a valve seat body (12) and a guide sleeve, the gasket (20) being fixed inside the valve seat body (12), the electronic expansion valve further comprising a sealing ring (40); wherein,
the outer wall of the valve needle part (30) is provided with a sealing groove, the sealing ring (40) is positioned in the sealing groove, and the sealing ring line is formed at the contact position of the outer wall of the sealing ring (40) and the inner wall of the guide sleeve; or alternatively, the first and second heat exchangers may be,
the inner wall of the guide sleeve is provided with a sealing groove, the sealing ring (40) is positioned in the sealing groove, and the sealing ring line is formed at the contact position of the inner wall of the sealing ring (40) and the outer wall of the valve needle part (30).
10. The electronic expansion valve according to claim 1, characterized in that the end of the valve needle portion (30) has a first conical surface (324) and a second conical surface (325) arranged in sequence, the first conical surface (324) being located inside the annular sealing surface (321), the second conical surface (325) being located inside the first conical surface (324), the conical angles of the first conical surface (324) and the second conical surface (325) being different, wherein, in the case of closing the valve port (21), the second conical surface (325) is located inside the valve port (21), and a part of the first conical surface (324) is located inside the valve port (21).
11. The electronic expansion valve according to claim 1, characterized in that the gasket (20) is made of an elastic material, the gasket (20) is located in a groove of the valve seat portion (10), the valve seat portion (10) has a retainer ring (14), the retainer ring (14) is riveted with an end face of the gasket (20), and an inner wall of the valve port (21) has a tapered surface for adjusting a flow rate.
12. The electronic expansion valve according to claim 1, wherein the valve needle portion (30) includes a valve head (32), a screw (33), a bearing (34), a bush (35) and an elastic member (36), the valve head (32) has the annular sealing surface (321), one end of the screw (33) penetrates into a cavity of the valve head (32), the bearing (34) is located between the screw (33) and an inner wall of the valve head (32), and the bearing (34), the bush (35), the elastic member (36) and a bottom wall of the valve head (32) are sequentially abutted; the valve head (32) is provided with a first channel, the bushing (35) is provided with a second channel, the screw (33) is provided with a third channel, the valve port (21), the first channel, the second channel, the third channel and the upper cavity (11) are sequentially communicated, and the balance channel (31) is formed by the first channel, the second channel and the third channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322142786.8U CN220556052U (en) | 2023-08-09 | 2023-08-09 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322142786.8U CN220556052U (en) | 2023-08-09 | 2023-08-09 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220556052U true CN220556052U (en) | 2024-03-05 |
Family
ID=90052257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322142786.8U Active CN220556052U (en) | 2023-08-09 | 2023-08-09 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220556052U (en) |
-
2023
- 2023-08-09 CN CN202322142786.8U patent/CN220556052U/en active Active
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