CN110701356A - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
- Publication number
- CN110701356A CN110701356A CN201810746875.4A CN201810746875A CN110701356A CN 110701356 A CN110701356 A CN 110701356A CN 201810746875 A CN201810746875 A CN 201810746875A CN 110701356 A CN110701356 A CN 110701356A
- Authority
- CN
- China
- Prior art keywords
- coil assembly
- electronic expansion
- expansion valve
- notch
- positioning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses an electronic expansion valve which comprises a valve body, a coil assembly and a sealing ring, wherein the valve body comprises a positioning part and an outer wall part, and the sealing ring is abutted with the positioning part, the coil assembly and the outer wall part. According to the invention, the sealing ring is arranged and is abutted against the positioning part, the coil assembly and the outer wall part, so that the channel gap between the contact surfaces in the coil structure of the electronic expansion valve can be sealed through the sealing ring, and the electrical insulating property of the coil and the service life of the electronic expansion valve are improved.
Description
Technical Field
The invention relates to the technical field of refrigeration control, in particular to an electronic expansion valve.
Background
The electronic expansion valve is mainly applied to a variable frequency air conditioning system and used for adjusting the flow of a refrigerant so as to keep the refrigerant loop system in an optimal state all the time. Currently, an electronic expansion valve includes a valve body portion for flow rate adjustment and a coil portion for providing a driving force, wherein the valve body portion is axially connected to the coil portion.
In the existing coil structure of the electronic expansion valve, the inner hole of the coil has more claw poles, more contact surfaces exist between the coil and resin after encapsulation, and channel gaps are formed between the contact surfaces, and the channel gaps are easily penetrated into the coil by moisture or water in the use process of a product to cause the electrical insulating property of the coil to be reduced, so that the product is more easily failed particularly in extreme environments such as seaside and shipping.
In view of the above, it is an urgent technical problem to be solved by those skilled in the art to provide an electronic expansion valve that reduces the risk of moisture entering the coil.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide an electronic expansion valve, which includes a valve body, a coil assembly, and a sealing ring, wherein the valve body includes a positioning portion and an outer wall portion, and the sealing ring abuts against the positioning portion, the coil assembly, and the outer wall portion.
According to the electronic expansion valve, the sealing ring is arranged and is abutted against the positioning part, the coil assembly and the outer wall part, so that the channel gap between the contact surfaces in the coil structure of the electronic expansion valve can be sealed through the sealing ring, and the risk of moisture entering the coil is reduced.
Meanwhile, the invention also provides another electronic expansion valve which comprises a valve body, a coil assembly and a sealing ring, wherein the valve body comprises a positioning part, and the sealing ring is abutted with the positioning part and the coil assembly.
According to the electronic expansion valve, the sealing ring is arranged and is abutted against the positioning part and the coil assembly, so that the channel gap between the contact surfaces in the coil structure of the electronic expansion valve can be sealed through the sealing ring, and the risk of moisture entering the coil is reduced.
Drawings
FIG. 1 is a schematic partial structure diagram of an electronic expansion valve according to a first embodiment of the present invention;
FIG. 2 is a state view of the valve body and coil assembly of FIG. 1 assembled;
FIG. 3 is an enlarged view of a portion I of FIG. 2;
FIG. 4 is a schematic half-section view of the coil assembly of FIG. 1;
FIG. 5 is a schematic partial view of an electronic expansion valve according to a second embodiment of the present invention;
FIG. 6 is a partial schematic view of an electronic expansion valve according to a third embodiment of the present invention;
FIG. 7 is a partial schematic view of an electronic expansion valve according to a fourth embodiment of the present invention;
fig. 8 is a partial enlarged view of a portion II in fig. 7.
In FIGS. 1-8:
1 valve body, 11 positioning part, 111 positioning plate part, 112 extending part, 12 outer wall part;
2, a coil assembly, a 21 shell, a 22 sealing cap, a 23 first notch part, a 231 arc notch, a 232 rectangular groove, a 24 second notch part, a 25 third groove, a 26 third notch part and a 27 fourth notch part;
3, sealing rings;
a a first sealed cavity and B a second sealed cavity.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-8, fig. 1 is a schematic partial structure diagram of an electronic expansion valve according to a first embodiment of the present invention; FIG. 2 is a state view of the valve body and coil assembly of FIG. 1 assembled; FIG. 3 is an enlarged view of a portion I of FIG. 2; FIG. 4 is a schematic half-section view of the coil assembly of FIG. 1; FIG. 5 is a schematic partial view of an electronic expansion valve according to a second embodiment of the present invention; FIG. 6 is a partial schematic view of an electronic expansion valve according to a third embodiment of the present invention; FIG. 7 is a partial schematic view of an electronic expansion valve according to a fourth embodiment of the present invention; fig. 8 is a partial enlarged view of a portion II in fig. 7.
In an embodiment, the present invention provides an electronic expansion valve, as shown in fig. 1, the electronic expansion valve includes a valve body 1, a coil assembly 2 and a sealing ring 3, wherein the valve body 1 has a positioning portion 11 for fixing the coil assembly 2, and a housing 21 of the coil assembly 2 is fixed to the positioning portion 11, so as to achieve connection between the coil assembly 2 and the valve body 1; meanwhile, the valve body 1 further has an outer wall portion 12, and the seal ring 3 abuts against the positioning portion 11, the coil assembly 2 and the outer wall portion 12, so that the seal ring 3 is used for sealing between the bottom of the coil assembly 2 and the valve body 1.
In the invention, the sealing ring 3 is arranged, and the sealing ring 3 is abutted against the positioning part 11, the coil assembly 2 and the outer wall part 12, so that the channel gap between the contact surfaces in the coil structure of the electronic expansion valve can be sealed by the sealing ring 3, thereby improving the electrical insulating property of the coil and prolonging the service life of the electronic expansion valve.
Specifically, as shown in fig. 1 and 5, the positioning portion 11, the coil assembly 2, and the outer wall portion 12 form a first seal cavity a, or the positioning portion 11, the coil assembly 2, and the outer wall portion 12 form a part of the first seal cavity a, and the seal ring 3 is located in the first seal cavity a and is in an axially compressed state in the first seal cavity a. Wherein, the positioning part 11, the coil assembly 2 and the outer wall part 12 form a part of the first sealed cavity a, which means that: in addition to the positioning portion 11, the coil assembly 2 and the outer wall portion 12, other components participate in enclosing the first sealed chamber a.
More specifically, as shown in fig. 1 and fig. 2, in the embodiment, the bottom of the housing 21 of the coil assembly 2 is opened with a first notch portion 23, and the first notch portion 23, the outer wall portion 12 and the positioning portion 11 form a first sealed cavity a, or the first notch portion 23, the outer wall portion 12 and the positioning portion 11 form a part of the first sealed cavity a.
As shown in fig. 3, a side wall of the first notch 23 away from the outer wall 12 is inclined outward with respect to the outer wall 12 so that the cross section of the first sealed chamber a is tapered.
With this arrangement, when the first seal cavity a is disposed away from the side wall of the outer wall portion 12 in an inclined manner, and the seal ring 3 is pressed in the first seal cavity a under the condition that the valve body 1 and the coil assembly 2 are assembled, the pressure of the inclined side wall on the seal ring 3 is perpendicular to the inclined side wall, so that the inclined pressure has a component force in a direction toward the outer wall portion 12, thereby improving the sealing performance between the seal ring 3 and the outer wall portion 12.
Taking the embodiment shown in fig. 1-3 as an example, under the action of the inclined pressure, the following three sealing surfaces are formed among the valve body 1, the housing 21, the positioning portion 11 and the sealing ring 3: (1) a sealing surface between the seal ring 3 and the inclined side wall of the first notch portion 23; (2) a sealing surface between the seal ring 3 and the positioning portion 11; (3) the sealing surface between the sealing ring 3 and the outer arm 12.
Further, as shown in fig. 3, an arc notch 231 is further opened on the inner ring of the housing 21, and an arc surface of the arc notch 231 can be attached to the bent portion of the claw pole.
In general, the coil assembly 2 is formed by inserting the core rod into the coil and performing injection molding, the claw poles of the stator housing are bent to form arc sections during injection molding, and when the arc surfaces of the arc notches 231 and the bent arc surfaces of the claw poles are attached to each other, the contact areas of the two arc surfaces can be increased, so that the stator housing is prevented from being inclined during injection molding due to the fact that the contact areas of the two arc surfaces are too small.
Meanwhile, the arc-shaped notch 231 and the first notch portion 23 are axially distributed and connected through the rectangular groove 232 to form the structure shown in fig. 3.
In addition, when the rectangular recessed groove 232 and the arc-shaped notch 231 are connected to the first notch portion 23, a space for the seal ring 3 in a compressed state to continue to deform can be provided.
In the second embodiment, as shown in fig. 5, the bottom of the housing 21 of the coil assembly 2 is opened with a second notch portion 24, and the second notch portion 24, the outer wall portion 12 and the positioning portion 11 form a first sealed cavity a, or the second notch portion 24, the outer wall portion 12 and the positioning portion 11 form a part of the first sealed cavity a, and in the embodiment shown in fig. 5, the second notch portion 24, the outer wall portion 12 and the positioning portion 11 form the first sealed cavity a.
The second notch 24 is provided in parallel with the outer wall 12 away from the side wall of the outer wall 12 of the cylindrical body 1, so that the cross section of the first sealed chamber a is rectangular.
Meanwhile, in the present embodiment, the housing 21 may further be provided with an arc-shaped notch 231 and a rectangular groove 232 which are communicated with the second notch portion 24, so as to increase the contact area between the claw pole and the core rod during the injection molding of the coil assembly 2, prevent the stator housing from being skewed, and provide a space for the coil 3 to continue to deform in a compressed state.
In addition, the present invention further provides another electronic expansion valve, as shown in fig. 6 and 7, the electronic expansion valve includes a valve body 1, a coil assembly 2 and a sealing ring 3, wherein the valve body 1 includes a positioning portion 11, and the sealing ring 3 abuts against both the positioning portion 11 and the coil assembly 2.
Similarly, in the invention, by arranging the sealing ring 3 and making the sealing ring 3 abut against the positioning part 11 and the coil assembly 2, the passage gap between the contact surfaces in the coil structure of the electronic expansion valve can be sealed by the sealing ring 3, thereby improving the electrical insulating property of the coil and the service life of the electronic expansion valve.
Specifically, as shown in fig. 6 and 7, the positioning portion 11 and the coil assembly 2 form a second sealed chamber B, or the positioning portion 11 and the coil assembly 2 form a part of the second sealed chamber B, and the seal ring 3 is located in the second sealed chamber B. The positioning part 11 and the coil assembly 2 form a part of the second sealed cavity B, which means that: in addition to the positioning portion 11 and the coil assembly 2, other components participate in enclosing the second sealed cavity B.
More specifically, as shown in fig. 6, the bottom of the casing 21 of the coil assembly 2 is opened with a first groove 25, and the first groove 25 and the positioning portion 11 form a second sealed cavity B, or the first groove 25 and the positioning portion 11 form a part of the second sealed cavity B.
Meanwhile, as shown in fig. 6, both sidewalls of the first groove 25 are parallel to each other, so that the second capsule B has a rectangular cross-section. Alternatively, the outer side wall of the first groove 25 is inclined outwardly (not shown) with respect to the inner side wall, so that the cross-section of the second capsule B is tapered.
In the fourth embodiment, as shown in fig. 7, the bottom of the coil assembly 2 is provided with a third notched portion 26, the positioning portion 11 includes a positioning plate portion 111 and extending portions 112 extending along the axial direction of the valve body 1, and along two ends of the valve body 1 in the radial direction, the dimension of the extending portions 112 is smaller than that of the positioning plate portion 111, so that after the valve body 1 and the coil assembly 2 are mounted, a space is provided between the extending portions 112 and the third notched portion 26, that is, the third notched portion 26, the extending portions 112 and the positioning plate portion 111 form the second sealed cavity B, or the third notched portion 26, the extending portions 112 and the positioning plate portion 111 form a part of the second sealed cavity B (not shown in the figure).
Further, as shown in fig. 7, the side wall of the third notch portion 26 is inclined outward with respect to the side wall of the extension portion 112, so that the cross section of the second sealing chamber B is tapered (not shown in the figure); alternatively, the side walls of the third notch portion 26 and the extension portion 112 are parallel to each other so that the cross section of the second sealed chamber B is rectangular.
Further, as shown in fig. 8, a fourth notch 27 is further formed at the bottom of the housing 21 of the coil assembly 2, the third notch 26 and the fourth notch 27 are distributed along the axial direction of the valve body 1, the fourth notch 27 is located at one end of the third notch 26 away from the positioning plate 111, and the third notch 26 and the fourth notch 27 form a stepped structure. The extension portion 112 extends into the fourth notch portion 27 in the axial direction of the valve body 1, and a side wall thereof abuts against a side wall of the fourth notch portion 27.
So set up for the sealed of sealing washer 3 in this second seal chamber B is curve seal structure, thereby improves its sealing performance greatly.
In addition, as shown in fig. 8, the side wall of the extension portion 112 contacting the sealing ring 3 has an arc-shaped section, and the arc-shaped section is tangent to the positioning plate portion 111, so that when the sealing ring 3 is in a compressed state in the second sealing cavity B, the stress applied to the sealing ring 3 by the extension portion 112 is reduced, thereby prolonging the service life of the sealing ring.
In the above embodiments, in addition to the sealing between the coil assembly 2 and the valve body 1 by the sealing ring 3 in the above embodiments, a sealing cap 22 is connected to the top of the housing 21, and the sealing cap 22 surrounds the valve body 1 from above.
Therefore, in the present invention, the coil assembly 21 is sealed from the upper side of the valve body 1 by the sealing cap 22, and the lower side is sealed by the sealing ring 3.
The electronic expansion valve provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (11)
1. Electronic expansion valve, including valve body (1), coil assembly (2) and sealing washer (3), its characterized in that, valve body (1) is including location portion (11) and outer wall portion (12), sealing washer (3) with location portion (11) coil assembly (2) outer wall portion (12) all butt.
2. An electronic expansion valve according to claim 1, wherein the positioning portion (11), the coil assembly (2) and the outer wall portion (12) form a first sealed chamber (a), or wherein the positioning portion (11), the coil assembly (2) and the outer wall portion (12) form part of a first sealed chamber (a) in which the sealing ring (3) is located.
3. The electronic expansion valve according to claim 2, wherein a bottom of the coil assembly (2) is provided with a first notch portion (23), and the first notch portion (23), the outer wall portion (12) and the positioning portion (11) form the first sealed chamber (a), or the first notch portion (23), the outer wall portion (12) and the positioning portion (11) form a part of the first sealed chamber (a);
the side wall of the first notch portion (23) is inclined outward with respect to the outer wall portion (12) so that the cross section of the first seal chamber (a) is tapered.
4. The electronic expansion valve according to claim 3, wherein an arc-shaped notch (231) is further formed in the inner ring of the housing (21), and an arc-shaped surface of the arc-shaped notch (231) can be attached to the bent portion of the claw pole;
the arc-shaped notch (231) is connected with the first notch part (23) through a rectangular groove (232).
5. The electronic expansion valve according to claim 2, wherein a second notched portion (24) is opened at a bottom portion of the housing (21) of the coil assembly (2), the second notched portion (24), the outer wall portion (12) and the positioning portion (11) forming the first seal chamber (a), or the second notched portion (24), the outer wall portion (12) and the positioning portion (11) forming a part of the first seal chamber (a);
the side wall of the second notch portion (24) is arranged in parallel with the outer wall portion (12).
6. Electronic expansion valve, including valve body (1), coil assembly (2) and sealing washer (3), its characterized in that, valve body (1) is including location portion (11), sealing washer (3) with location portion (11) coil assembly (2) all butt.
7. An electronic expansion valve according to claim 6, wherein the positioning portion (11) and the coil assembly (2) form a second seal chamber (B), or wherein the positioning portion (11) and the coil assembly (2) form part of a second seal chamber (B), the sealing ring (3) being located in the second seal chamber (B).
8. An electronic expansion valve according to claim 7, wherein a first groove (25) is opened at the bottom of the housing (21) of the coil assembly (2), the first groove (25) and the positioning portion (11) form the second sealed chamber (B), or the first groove (25) and the positioning portion (11) form a part of the second sealed chamber (B);
two side walls of the first groove (25) are parallel to each other, or the outer side wall of the first groove (25) is inclined outwards relative to the inner side wall.
9. The electronic expansion valve according to claim 7, wherein a bottom of the coil assembly (2) is opened with a third notched portion (26), the positioning portion (11) includes a positioning plate portion (111) and an extending portion (112) extending in an axial direction of the valve body (1), and the third notched portion (26), the extending portion (112), and the positioning plate portion (111) form the second seal chamber (B), or the third notched portion (26), the extending portion (112), and the positioning plate portion (111) form a part of the second seal chamber (B).
10. The electronic expansion valve according to claim 9, wherein a side wall of the third cutaway portion (26) is inclined outward with respect to a side wall of the extended portion (112), or wherein the side wall of the third cutaway portion (26) and the side wall of the extended portion (112) are parallel to each other.
11. The electronic expansion valve according to claim 9 or 10, wherein a fourth notch portion (27) is further opened at a bottom of the coil assembly (2), the third notch portion (26) and the fourth notch portion (27) are distributed along an axial direction of the valve body (1), and a side wall of the extending portion (112) abuts against a side wall of the fourth notch portion (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746875.4A CN110701356A (en) | 2018-07-09 | 2018-07-09 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810746875.4A CN110701356A (en) | 2018-07-09 | 2018-07-09 | Electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110701356A true CN110701356A (en) | 2020-01-17 |
Family
ID=69192486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810746875.4A Pending CN110701356A (en) | 2018-07-09 | 2018-07-09 | Electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110701356A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021185048A1 (en) * | 2020-03-16 | 2021-09-23 | 杭州三花研究院有限公司 | Electric valve and assembly method therefor |
| WO2023236568A1 (en) * | 2022-06-06 | 2023-12-14 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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