CN106322861B - Electronic expansion valve - Google Patents
Electronic expansion valve Download PDFInfo
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- CN106322861B CN106322861B CN201510381078.7A CN201510381078A CN106322861B CN 106322861 B CN106322861 B CN 106322861B CN 201510381078 A CN201510381078 A CN 201510381078A CN 106322861 B CN106322861 B CN 106322861B
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- guide sleeve
- valve needle
- valve
- needle
- electronic expansion
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- 230000004323 axial length Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 7
- 241000425571 Trepanes Species 0.000 claims description 4
- 230000003139 buffering effect Effects 0.000 claims 1
- 230000003116 impacting effect Effects 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
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- 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
- F25B41/31—Expansion valves
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- 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
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses an electronic expansion valve, which comprises a valve port seat, a guide sleeve and a valve needle, wherein the lower end of the guide sleeve is sleeved or connected with the upper end of the valve port seat into a whole or the guide sleeve and the valve port seat are integrated into a whole, the upper part of the valve needle is provided with a large-diameter part, the lower part of the valve needle is provided with a small-diameter part, the small-diameter part of the valve needle is positioned in the guide sleeve and can do reciprocating motion in the guide sleeve along the axial direction, the small-diameter part is slidably sleeved with a lantern ring for blocking air flow, and the outer side wall of the lantern ring is fixedly connected with the inner side wall of the guide sleeve or the lantern ring and the guide sleeve are integrated into a whole. The electronic expansion valve can effectively prevent the air flow from directly impacting the valve needle, when the air flow impact force is large, most of the air flow is blocked by the lower end face of the sleeve ring, and the head of the valve needle can be impacted by a small amount of air flow only, so that the valve needle cannot be greatly vibrated, the noise caused by vibration of the valve needle can be reduced, and even the noise can be eliminated.
Description
Technical Field
The invention relates to an electronic expansion valve, in particular to an electronic expansion valve applied to a refrigerating system of an air conditioner, a refrigerator and the like.
Background
The electronic expansion valve is an important part in a refrigeration system and mainly plays roles in throttling, reducing pressure and regulating flow. The existing electronic expansion valve comprises a valve body, a nut and a valve needle assembly in threaded fit with the nut, and the valve needle assembly is driven by a driving device to rotate and simultaneously generate axial movement to adjust the opening degree of a valve port so as to realize circulation control.
The invention patent with publication number CN102454818A and name "one kind of electric valve" discloses an electronic expansion valve with the following structure: valve seat, valve core case, needle lead screw subassembly, nut, wherein needle lead screw subassembly is installed in the nut to the nut is in the same place with the valve core case suit, and in fact, the motorised valve of this kind of structure requires very high to the neutrality of needle subassembly and nut, because the nut is separately processed with the valve core case, even if the nut is in the same place with the valve core case suit, also difficult assurance nut and the axiality of needle lead screw subassembly, make the nut that plastics were made wear and tear very easily, reduce electronic expansion valve's life.
Therefore, the applicant improves the electric valve and applies for a patent on 12.7.2013, wherein the patent is 201310296770.0 and the name of the invention is 'an electronic expansion valve'. The coaxiality of the nut of the electronic expansion valve and the valve needle screw rod assembly is greatly improved. However, when the refrigerant is not stably operated, the electronic expansion valve generates noise. Since the noise is generated only when the electronic expansion valve is operated, and the noise is not always present, the cause of the noise cannot be found for a long time, and the electronic expansion valve cannot be further improved to eliminate or reduce the noise. Through long-term practice, research and analysis, the applicant finally finds the cause of the noise and solves the problem of the noise by the simplest and cheapest technical means.
Disclosure of Invention
The invention aims to provide an electronic expansion valve which can reduce noise caused by vibration of a valve needle.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an electronic expansion valve, includes valve port seat, uide bushing and needle, the lower extreme of uide bushing with the upper end of valve port seat cup joints or links as an organic whole or the uide bushing with the valve port seat is integrative, there is the major diameter portion on the upper portion of needle, there is path portion in the lower part of needle, the path portion of needle is located can be along axial reciprocating motion in this uide bushing in and in this uide bushing correspond needle (42) the position of minor diameter portion is equipped with the lantern ring, the lateral wall of this lantern ring with the inside wall fixed connection of uide bushing or the lantern ring with the uide bushing is integrative.
Further, the axial length of the sleeve ring sleeve hole is larger than or equal to 1.5 times of the diameter of the small-diameter part of the valve needle and smaller than the length of the small-diameter part of the valve needle.
Further, the length of the small-diameter part of the valve needle is greater than 6 times of the diameter of the small-diameter part of the valve needle, and the axial length of the sleeve ring sleeve hole is greater than or equal to 2 times of the diameter of the small-diameter part of the valve needle and smaller than half of the length of the small-diameter part of the valve needle.
Further, the inner wall of uide bushing is provided with the fixed part that is used for fixing the lantern ring.
Further, the fixing part of the inner wall of the guide sleeve for fixing the lantern ring is a step and/or a clamping head.
Further, the step is an upper step or a lower step; a threaded hole is formed in the side face of the guide sleeve corresponding to the end face of the sleeve ring, a screw is configured in the threaded hole, and a screw head of the screw penetrates from the outer side face to the inner side face of the guide sleeve to form the chuck; or, the side surface of the guide sleeve and the side surface of the lantern ring are respectively provided with a hole coaxially, one hole is a threaded hole, a screw is configured in the threaded hole, and the head of the screw forms the chuck.
Further, the valve port seat, the guide sleeve and the collar are integrated.
Compared with the prior art, the electronic expansion valve has the following beneficial effects.
The electronic expansion valve adopts the technical means that the lantern ring is arranged in the guide sleeve corresponding to the small-diameter part of the valve needle (42), the outer side wall of the lantern ring is fixedly connected with the inner side wall of the guide sleeve or the lantern ring and the guide sleeve are integrated, the lantern ring can effectively prevent airflow from directly impacting the valve needle, only the head part of the valve needle can be impacted by a small part of the airflow, and large vibration cannot be generated on the valve needle, so that the noise caused by the vibration of the valve needle can be reduced.
Drawings
The electronic expansion valve of the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.
Fig. 1 is a schematic view of an internal structure of a first electronic expansion valve according to the present embodiment;
fig. 2 is a schematic view of an internal structure of a second electronic expansion valve according to the present embodiment;
fig. 3 is a schematic view of the internal structure of a third electronic expansion valve according to the present embodiment;
fig. 4 is a schematic internal structural view of a fourth electronic expansion valve according to the present embodiment;
FIG. 5 is a schematic view of a first connection structure between the valve port seat, the guide sleeve and the collar of FIG. 4;
FIG. 6 is a schematic view of a second connection structure between the valve port seat, the guide sleeve and the collar of FIG. 4;
FIG. 7 is a schematic view of a third connection structure between the valve port seat, the guide sleeve and the collar of FIG. 4;
FIG. 8 is a schematic view of the first collar shown in FIGS. 1 to 4;
FIG. 9 is a schematic view of a second collar of FIGS. 1-4;
FIG. 10 is a schematic view of the third collar of FIGS. 1-4;
fig. 11 is a schematic structural view of a fourth collar shown in fig. 1 to 4.
The reference numerals are explained below.
1. A valve body; 10. a valve cavity; 11. an inlet connection pipe; 12. an outlet connection pipe; 2. a nut; 3. a guide sleeve;
31. a step; 32. clamping a head; 33. an airflow impingement cavity; 34. a lower buffer chamber; 35. an upper buffer chamber;
4. a valve needle assembly; 41. a screw rod; 42. a valve needle; 421. a large diameter portion; 422. a small diameter part;
43. a positioning sleeve; 44. a valve needle spring; 45. a valve needle sleeve; 5. a spring guide rail; 51. a snap ring;
6. a magnetic rotor; 61. a guide piece; 7. a valve port seat; 71. a valve port; 8. a collar.
Detailed Description
As shown in fig. 1 to 11, an electronic expansion valve includes a valve port seat 2, a guide sleeve 3, and a valve needle 42, wherein a lower end of the guide sleeve 3 is sleeved with an upper end of the valve port seat 2 (see fig. 1 and 6). Of course, the lower end of the guide sleeve 3 may be fixedly connected with the upper end of the valve seat 2. It is also possible that the guide sleeve 3 and the valve seat 2 are an integral piece (see fig. 2 and 5). The upper part of the valve needle 42 is provided with a large diameter part 421, the lower part of the valve needle 42 is provided with a small diameter part 422, the small diameter part 422 of the valve needle 42 is positioned in the guide sleeve 3 and can reciprocate in the guide sleeve 3 along the axial direction, the small diameter part 422 is slidably sleeved with a collar 8 for blocking air flow, and the outer side wall of the collar 8 is fixedly connected with the inner side wall of the guide sleeve 3 (see fig. 1). Of course, it is also possible for the collar 8 to be formed in one piece with the guide sleeve 3 (see fig. 6).
The electronic expansion valve adopts the technical means that the lantern ring is arranged in the guide sleeve corresponding to the small-diameter part of the valve needle (42), the outer side wall of the lantern ring is fixedly connected with the inner side wall of the guide sleeve or the lantern ring and the guide sleeve are integrated, the lantern ring can effectively prevent airflow from directly impacting the valve needle (particularly the large-diameter part of the valve needle), only the head part of the valve needle can be impacted by the airflow of a small part, and large vibration can not be generated on the valve needle, so that the noise caused by the vibration of the valve needle can be reduced.
As a modification of the present embodiment, as shown in fig. 1 to 3, the upper end of the guide sleeve 3 is connected with the lower end of the nut 2, the valve needle 42 is movably mounted at the lower end of the positioning sleeve 43, the positioning sleeve 43 is disposed in the guide sleeve 3 above the collar 8, the inner cavity of the guide sleeve 3 is divided into the airflow impact cavity 33, the lower buffer cavity 34 and the upper buffer cavity 35 by the collar 8 and the positioning sleeve 43 from bottom to top, and the outer side surface of the positioning sleeve 43 is in sliding fit with the inner side surface of the guide sleeve 3.
The electronic expansion valve of the invention adopts the technical means that the inner cavity of the guide sleeve is divided into the airflow impact cavity, the lower buffer cavity and the upper buffer cavity from bottom to top by the lantern ring and the positioning sleeve, so that the gas in the upper buffer cavity has a buffer effect on the gas flowing from the lower buffer cavity, the gas in the lower buffer cavity has a great buffer effect on the airflow flowing from the airflow impact cavity, an annular damping channel is formed between the small-diameter part of the valve needle and the lantern ring sleeve hole, when the airflow impact force in the airflow impact cavity is great, most of the airflow is blocked by the lower end surface of the lantern ring, only a small part of the airflow enters the lower buffer cavity through the damping channel, under the resistance effect of the damping channel, the airflow entering the lower buffer cavity is greatly reduced under the action of the gas in the lower buffer cavity, and under the action of the gas in the upper buffer cavity, the airflow entering the lower buffer cavity does not impact parts such as the large-diameter part of the valve needle and the positioning sleeve, when the airflow impulse force in the airflow impact cavity is small, the air in the lower buffer cavity slowly enters the airflow impact cavity, and the air in the upper buffer cavity slowly enters the lower buffer cavity without impacting the valve needle assembly, so that the noise caused by vibration of the valve needle can be reduced, and the noise can be eliminated (particularly, after long-term theoretical research and numerous scientific experiments, the lower buffer cavity is finally discovered without the action of the lantern ring, and parts such as the front part, the rear part and the positioning sleeve of the valve needle directly face the airflow impact cavity, at this time, only the upper buffer cavity is insufficient, the airflow can directly act on the parts such as the front part, the rear part and the positioning sleeve of the valve needle, and all the parts generate vibration and collide with each other under the direct action of the airflow to generate noise).
As another improvement of the present embodiment, as shown in fig. 4, the collar 8 is disposed at the upper end in the guide sleeve 3, the lower part of the collar 8 forms an airflow impacting chamber 33, the upper end of the guide sleeve 3 is connected with the lower end of the nut 2, the lower part of the nut 2 has a positioning chamber, the upper edge of the large diameter portion 421 of the valve needle 42 extends upwards to form a cavity, the large diameter portion 421 of the valve needle 42 is located in the positioning chamber and divides the positioning chamber into a lower annular buffer chamber 34 and an upper annular buffer chamber 35, and the outer side surface of the large diameter portion 421 of the valve needle 42 is in sliding fit with the inner side surface of the positioning chamber.
The electronic expansion valve of the invention adopts the technical means that the lantern ring is arranged at the upper end in the guide sleeve, the airflow impact cavity is formed below the lantern ring, the upper end of the guide sleeve is connected with the lower end of the nut, the positioning cavity is arranged at the lower part of the nut, the upper edge of the large-diameter part of the valve needle extends upwards to form the large-diameter part of the cavity valve needle which is positioned in the positioning cavity and divides the positioning cavity into the lower annular buffer cavity and the upper annular buffer cavity, so that the gas in the upper buffer cavity has the buffer function on the gas flowing from the lower buffer cavity, the gas in the lower buffer cavity has the great buffer function on the airflow flowing from the airflow impact cavity, an annular damping channel is formed between the small-diameter part of the valve needle and the lantern ring trepanning, when the airflow impact force in the airflow impact cavity is great, most of the airflow is blocked by the lower end surface of the lantern ring, and only a small part of the airflow enters the lower buffer cavity through the damping channel, under the resistance action of the damping channel, the airflow entering the lower buffer cavity is greatly reduced under the action of the gas in the lower buffer cavity, the airflow entering the lower buffer cavity does not impact the large-diameter part of the valve needle and various parts under the action of the gas in the upper buffer cavity, when the airflow impact force in the airflow impact cavity is small, the gas in the lower buffer cavity slowly enters the airflow impact cavity, the gas in the upper buffer cavity slowly enters the lower buffer cavity and does not impact the valve needle assembly, the noise caused by vibration of the valve needle can be reduced, and the noise can be eliminated (after long-term theoretical research and numerous scientific experiments, the existing situation is finally realized, if the effect of a lantern ring is not existed, the lower buffer cavity can not be formed, and the front part, the rear part and various parts of the valve needle directly face the airflow impact cavity, in this case, only the upper cushion chamber is insufficient, and the air flow directly acts on the front and rear portions of the needle and the positioning sleeve, and the respective components vibrate and collide with each other by the direct action of the air flow to generate noise).
As a further improvement of this embodiment, as shown in fig. 1 to 4, the guide bush 3 and the nut 2 are formed as one piece. Therefore, the coaxiality between the sleeve and the nut can be greatly improved, the reciprocating motion of the valve needle assembly is facilitated, and the noise is avoided.
As a further modification of the present embodiment, as shown in fig. 8, the upper and lower surfaces of the collar 8 are flat surfaces, but as shown in fig. 9 to 11, the upper and lower surfaces of the collar 8 may be curved surfaces. When the end face of the lantern ring is a curved surface, the axial length of the lantern ring and the trepan boring is increased while the material is saved, and the space of the upper buffer cavity and the lower buffer cavity is increased (see fig. 11).
As a further modification of the present embodiment, as shown in fig. 9 to 11, the curved surface may be an inner curved surface or an outer curved surface. Therefore, the electronic expansion valve with various lantern ring shapes can be produced according to different requirements of customers.
As a further improvement of this embodiment, as shown in fig. 9, the inner curved surface may be an inner hemispherical surface or an inner conical surface, and similarly, as shown in fig. 10 to 11, the outer curved surface may be an outer hemispherical surface or an outer conical surface. Therefore, the collar with different shapes can be adopted to produce the electronic expansion valve according to actual conditions.
As a still further improvement of this embodiment, as shown in fig. 1 and 3, the axial length of the trepanning of the collar 8 is greater than or equal to 1.5 times the diameter of the small diameter portion 422 of the valve pin 42 and less than the length of the small diameter portion 422 of the valve pin 42. In this way, it is ensured that the trepan of the collar creates sufficient resistance to mitigate the impact of the airflow.
As a still further improvement of this embodiment, as shown in fig. 1 to 3, the length of the small diameter portion 422 of the valve needle 42 is greater than 6 times the diameter of the small diameter portion 422 of the valve needle 42, and the axial length of the trepanning of the collar 8 is greater than or equal to 2 times the diameter of the small diameter portion 422 of the valve needle 42 and less than half the length of the small diameter portion 422 of the valve needle 42. In this way, the sleeve holes of the lantern ring can generate sufficient resistance to relieve the impact of the airflow.
As a further modification of this embodiment, as shown in fig. 1 to 3, the inner wall of the guide bush 3 is provided with a fixing portion for fixing the collar 8. In this way, control of the position of the collar is facilitated.
As a further improvement of this embodiment, as shown in fig. 2 to 3, the fixing portion of the inner wall of the guide bush 3 for fixing the collar 8 is a step 31. Alternatively, as shown in fig. 1, the fixing portion of the inner wall of the guide sleeve 3 for fixing the collar 8 may be a clamp 32. As shown in fig. 2, the fixing part of the inner wall of the guide sleeve 3 for fixing the collar 8 is a step 31 and a draw-in head 32. Therefore, different fixing parts can be adopted according to actual conditions.
As still a further improvement of this embodiment, as shown in fig. 2, the step 31 is an upper step. Of course, it is also possible that the step 31 is a lower step, as shown in fig. 3. In production, the method can be reasonably selected according to actual conditions. As shown in fig. 1, a screw hole is formed in the side surface of the guide sleeve 3 at a position corresponding to the end surface of the collar 8, a screw is disposed in the screw hole, and the head of the screw penetrates from the outer side surface to the inner side surface of the guide sleeve 3 to form a head 32. Alternatively, the side surface of the guide sleeve 3 and the side surface of the collar 8 may be provided with holes coaxially, one of which is a threaded hole provided with a screw, and the head of the screw may be formed as a head 32. The processing of chuck type fixed part is easier, saves the cost of manufacture.
As a further improvement of this embodiment, as shown in fig. 7, the valve seat 2, the guide sleeve 3, and the collar 8 are an integral piece. Therefore, the processing precision of the valve port seat, the guide sleeve and the lantern ring can be greatly improved, and the product quality is greatly improved.
As a final improvement of the present embodiment, as shown in fig. 1 to 3, the electronic expansion valve of the present embodiment includes a valve body 1, a nut 2, a valve needle assembly 4 and a guide sleeve 3, wherein a valve cavity 10 is formed inside the valve body 1, an inlet connection pipe 11 and an outlet connection pipe 12 are connected to the valve body 1, a valve port seat 7 is arranged at the lower end of the valve body 1, a valve port 71 is arranged on the valve port seat 7, the valve port 71 corresponds to the outlet connection pipe 12, and the lower end of the guide sleeve 3 is sleeved with the valve port seat 7; the valve needle assembly 4 comprises a valve needle 42, a screw rod 41 and a positioning sleeve 43, the lower end of the screw rod 41 is fixedly connected with the upper end of the positioning sleeve 43 through a valve needle sleeve 45, the valve needle 42 is movably arranged at the lower end of the positioning sleeve 43, and a valve needle spring 44 is arranged between the valve needle 42 and the screw rod 41; the upper end of the screw rod 41 penetrates through the nut 2, the spring guide rail 5 and the stop ring 51 are sleeved on the nut 2, the magnetic rotor 6 is provided with the guide sheet 61, and the magnetic rotor 6 is fixed at the upper end of the screw rod 41 after the positions of the stop ring 51 and the guide sheet 61 are set. The rotation of the magnetic rotor 6 can drive the screw rod 41 to rotate and generate axial movement, and the axial movement of the screw rod 41 drives the valve needle 42 to move up and down through the positioning sleeve 43, so that the opening degree of the valve port 71 can be adjusted, and the purpose of adjusting the flow rate of the refrigerant is achieved.
For the non-specification contents, reference is made to patent document No. 201310296770.0 and patent document No. CN 102454818A. And will not be described in detail herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides an electronic expansion valve, includes valve port seat (7), uide bushing (3) and needle (42), the lower extreme of uide bushing (3) with the upper end of valve port seat (7) cup joints or links as an organic whole or uide bushing (3) with valve port seat (7) are integrative, there is major diameter portion (421) on the upper portion of needle (42), the lower part of needle (42) has minor diameter portion (422), minor diameter portion (422) of needle (42) are located in uide bushing (3) and can be in this uide bushing (3) along axial reciprocating motion, its characterized in that: a lantern ring (8) is arranged at a position, corresponding to the small-diameter part (422) of the valve needle (42), in the guide sleeve (3), the outer side wall of the lantern ring is fixedly connected with the inner side wall of the guide sleeve (3) or the lantern ring (8) and the guide sleeve (3) are integrated, the upper end of the guide sleeve (3) is connected with the lower end of a nut (2), the valve needle (42) is movably installed at the lower end of a positioning sleeve (43), the positioning sleeve (43) is arranged in the guide sleeve (3) and is positioned above the lantern ring (8), the lantern ring (8) and the positioning sleeve (43) divide the inner cavity of the guide sleeve (3) into an airflow impact cavity (33), a lower buffer cavity (34) and an upper buffer cavity (35) from bottom to top, the outer side surface of the positioning sleeve (43) is in sliding fit with the inner side surface of the guide sleeve (3), and airflow in the upper buffer cavity plays a role in buffering the gas flowing from the lower buffer cavity, the gas in the lower buffer cavity has a buffer function on the gas flow flowing in from the gas flow impact cavity, and an annular damping channel can be formed between the small diameter part (422) of the valve needle (42) and the inner wall of the trepan boring in the lantern ring (8).
2. The electronic expansion valve according to claim 1, wherein the collar (8) is disposed at an upper end of the guide sleeve (3), an airflow impact chamber (33) is formed below the collar (8), the upper end of the guide sleeve (3) is connected with a lower end of the nut (2), a positioning chamber is formed at a lower portion of the nut (2), an upper edge of a large diameter portion (421) of the valve needle (42) extends upwards to form a cavity, the large diameter portion (421) of the valve needle (42) is located in the positioning chamber and divides the positioning chamber into a lower annular buffer chamber (34) and an upper annular buffer chamber (35), and an outer side surface of the large diameter portion (421) of the valve needle (42) is in sliding fit with an inner side surface of the positioning chamber.
3. An electronic expansion valve according to claim 1 or 2, wherein the guide sleeve (3) and the nut (2) are in one piece.
4. The electronic expansion valve according to claim 1, wherein the axial length of the collar (8) trepan boring is greater than or equal to 1.5 times the diameter of the small diameter portion (422) of the valve needle (42) and less than the length of the small diameter portion (422) of the valve needle (42).
5. The electronic expansion valve according to claim 4, wherein the length of the small diameter portion (422) of the valve needle (42) is greater than 6 times the diameter of the small diameter portion (422) of the valve needle (42), and the axial length of the trepanning of the collar (8) is greater than or equal to 2 times the diameter of the small diameter portion (422) of the valve needle (42) and less than half of the length of the small diameter portion (422) of the valve needle (42).
6. An electronic expansion valve according to claim 1, wherein the inner wall of the guide sleeve (3) is provided with a fixing portion for fixing the collar (8).
7. An electronic expansion valve according to claim 6, wherein the fixing portion of the inner wall of the guide sleeve (3) for fixing the collar (8) is a step (31) and/or a clip (32).
8. The electronic expansion valve according to claim 7, wherein the step (31) is an upper step or a lower step, a threaded hole is formed in the side surface of the guide sleeve (3) corresponding to the end surface of the collar (8), a screw is arranged in the threaded hole, and the head of the screw penetrates from the outer side surface to the inner side surface of the guide sleeve (3) to form the chuck (32); or the side surface of the guide sleeve (3) and the side surface of the lantern ring (8) are respectively provided with a hole coaxially, one hole is a threaded hole, a screw is configured in the threaded hole, and the head of the screw forms the chuck (32).
9. An electronic expansion valve according to claim 7, wherein the valve port seat (7), the guide sleeve (3) and the collar (8) are one-piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510381078.7A CN106322861B (en) | 2015-06-29 | 2015-06-29 | Electronic expansion valve |
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| CN201510381078.7A CN106322861B (en) | 2015-06-29 | 2015-06-29 | Electronic expansion valve |
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| CN106322861B true CN106322861B (en) | 2021-09-28 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018137636A1 (en) * | 2017-01-26 | 2018-08-02 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN108361393B (en) * | 2017-01-26 | 2021-08-27 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN108361385A (en) * | 2017-01-26 | 2018-08-03 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN108361386A (en) * | 2017-01-26 | 2018-08-03 | 浙江三花智能控制股份有限公司 | Electric expansion valve |
| CN109538772B (en) * | 2017-09-21 | 2022-09-20 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN109751428B (en) * | 2017-11-07 | 2022-04-26 | 浙江三花智能控制股份有限公司 | Electronic expansion valve |
| CN110836562A (en) * | 2018-08-17 | 2020-02-25 | 浙江盾安禾田金属有限公司 | Electronic expansion valve and air conditioning system using same |
| CN112361671A (en) * | 2020-12-04 | 2021-02-12 | 上海克来机电自动化工程股份有限公司 | Solenoid valve with hard seal structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270817A (en) * | 2007-03-20 | 2008-09-24 | 株式会社鹭宫制作所 | Pin valve and refrigeration cycle device using the pin valve |
| CN102913678A (en) * | 2012-10-19 | 2013-02-06 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN104279342A (en) * | 2013-07-12 | 2015-01-14 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2616764Y (en) * | 2003-03-21 | 2004-05-19 | 浙江三花集团有限公司 | Valve needle anti-impact structure for electronic expansion valve |
| JP5480753B2 (en) * | 2010-08-25 | 2014-04-23 | 株式会社鷺宮製作所 | Motorized valve |
| CN202973684U (en) * | 2012-11-06 | 2013-06-05 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101270817A (en) * | 2007-03-20 | 2008-09-24 | 株式会社鹭宫制作所 | Pin valve and refrigeration cycle device using the pin valve |
| CN102913678A (en) * | 2012-10-19 | 2013-02-06 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN104279342A (en) * | 2013-07-12 | 2015-01-14 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
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