CN108386585B - Electronic expansion valve and air conditioner - Google Patents
Electronic expansion valve and air conditioner Download PDFInfo
- Publication number
- CN108386585B CN108386585B CN201810205278.0A CN201810205278A CN108386585B CN 108386585 B CN108386585 B CN 108386585B CN 201810205278 A CN201810205278 A CN 201810205278A CN 108386585 B CN108386585 B CN 108386585B
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- Prior art keywords
- electronic expansion
- expansion valve
- screw shaft
- magnet
- plate
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- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000004663 powder metallurgy Methods 0.000 claims description 5
- 238000005272 metallurgy Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
-
- 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
-
- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/10—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid with additional mechanism between armature and closure member
-
- 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
-
- 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)
- Electromagnetism (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Check Valves (AREA)
Abstract
The invention provides an electronic expansion valve and an air conditioner. The electronic expansion valve includes: valve seat, valve body and upper cover assembly; the nut is fixedly arranged in the mounting cavity; the moving assembly is arranged in the mounting cavity and positioned above the nut, and comprises a screw shaft, a needle valve, a magnet and a connecting and positioning mechanism, wherein the needle valve is arranged on the screw shaft in a penetrating way, the magnet and the screw shaft are fixedly connected together through the connecting and positioning mechanism, and the screw shaft is in threaded connection with the nut and is movably arranged along the axial direction of the nut; the upper end limiting mechanism is arranged between the upper cover assembly and the connecting and positioning mechanism to limit the upper end of the moving assembly; the lower end limiting mechanism is arranged between the nut and the connecting and positioning mechanism to limit the lower end of the moving assembly. The upper end limiting mechanism and the lower end limiting mechanism are not arranged on the magnet, so that the magnet can be prevented from participating in braking, the durability of the magnet is improved, and meanwhile, the electronic expansion valve is prevented from being blocked due to powder generated by abrasion when the magnet participates in braking.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an electronic expansion valve and an air conditioner.
Background
The invention patent of an electric valve of Japan "Lugong manufacturing department", patent application number is: 200910151775.8, the technical point is that in order to make the assembly operation of the support component, the rotor shaft and the magnet easier, the structural design of the upper end limiter and the lower end limiter is carried out on the three parts; and a fixed design between the rotor shaft and the magnetic rotor.
In the prior art, the magnet is fragile and poor in wear resistance, is directly used for stopping, is easy to wear, and powder generated by wear enters the screw thread, the gap between the outer wall of the magnet and the shell, the gap between the needle valve and the valve port and the like, and is easy to be blocked; if the magnet and the rotor shaft are fixed in an elastic clamping mode, the magnet is easy to damage in the assembly process, and if the magnet is pressed into the assembly in a hot welding mode in an electric heating mode, the requirements on the stability of the heating temperature of the equipment and the stability of the pressure of the cylinder are high; after the magnet is assembled, the whole structure is fixed and cannot be easily detached, and the whole structure can only be scrapped when a problem occurs; the magnet material contains rare earth material, the price is very high, the magnet structure material is large in use amount, and the cost is easy to rise.
Disclosure of Invention
The invention mainly aims to provide an electronic expansion valve and an air conditioner, which are used for solving the problems of short service life and poor stability of a stop structure of the electronic expansion valve in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electronic expansion valve comprising: the valve seat, the valve body and the upper cover assembly are arranged on the valve seat, and the upper cover assembly is arranged at one end of the valve body far away from the valve seat and forms a mounting cavity with the valve body in a surrounding mode; the nut is fixedly arranged in the mounting cavity; the moving assembly is arranged in the mounting cavity and is positioned above the nut, the moving assembly comprises a screw shaft, a needle valve, a magnet and a connecting and positioning mechanism, the needle valve is arranged on the screw shaft in a penetrating mode, the magnet and the screw shaft are fixedly connected together through the connecting and positioning mechanism, and the screw shaft is in threaded connection with the nut and is movably arranged along the axial direction of the nut; the upper end limiting mechanism is arranged between the upper cover assembly and the connecting and positioning mechanism so as to limit the upper end of the moving assembly; the lower end limiting mechanism is arranged between the nut and the connecting and positioning mechanism so as to limit the lower end of the motion assembly.
Further, the lower end limiting mechanism includes: the first lower end limiting part is arranged at the top end of the nut; the second lower end limiting part is arranged at the bottom of the connecting and positioning mechanism, and the first lower end limiting part is contacted with the second lower end limiting part to limit the lower end of the motion assembly.
Further, the first lower end limiting portion and the second lower end limiting portion are both limiting protrusions.
Further, a limiting outer flange is arranged on the screw shaft; the connection positioning mechanism comprises: the stop plate is provided with a mounting hole, and the screw shaft is mounted in the mounting hole and limited on the stop plate through the limit outer flange; the connecting plate is fixedly connected with the stop plate, and the magnet is fixedly arranged with the connecting plate; the second lower end limiting part is arranged at the bottom of the stop plate or the connecting plate.
Further, at least one limiting block protruding out of the upper surface of the stop plate is arranged on the stop plate, and a limiting plane matched with the limiting block is arranged on the periphery of the limiting outer flange.
Further, a groove is formed in the connecting plate, the connecting plate is covered on the screw shaft, the top end of the screw shaft is located in the groove, the magnet is a magnetic ring, and the magnetic ring and the connecting plate are integrally formed in an injection molding mode.
Further, the outer side of the connecting plate is provided with at least one trimming.
Further, two limiting blocks are arranged, two connecting holes are formed in the connecting plate, and the two limiting blocks are riveted or welded in the two connecting holes in a one-to-one correspondence mode.
Further, the upper end limiting mechanism includes: the first upper end limiting part is arranged on the upper cover assembly; the second upper end limiting part is arranged on the stop plate, and the second upper end limiting part is contacted with the first upper end limiting part to limit the upper end of the motion assembly.
Further, the second upper end limiting part is a limiting convex strip arranged on the upper surface of the stop plate; the upper cover assembly comprises a shell and an inner cover, and the first upper end limiting part is a limiting projection which is arranged at the edge of the inner cover and extends towards the inner part of the inner cover.
Further, the connecting plate is provided with a relief through hole, and the limit convex strips penetrate through the relief through hole.
Further, the stop plate is a stainless steel sheet metal part.
Further, the motion assembly further comprises a spring, a through hole extending along the axial direction of the screw shaft is formed in the screw shaft, the needle valve is installed in the through hole, and two ends of the spring are respectively propped against the bottom of the groove and the top end of the needle valve.
Further, the connecting plate comprises a connecting block and a spring cover welded on the connecting block.
Further, the connecting plate is manufactured by adopting a stainless steel sheet metal part or a powder metallurgy part.
According to another aspect of the present invention, there is provided an air conditioner including an electronic expansion valve, the electronic expansion valve being the above-described electronic expansion valve.
By applying the technical scheme of the invention, in the actual use process, the electronic expansion valve controls the rotation of the magnet and the screw shaft by applying pulse current to the coil part, and the needle valve inside the screw shaft advances and retreats relative to the valve port on the valve seat under the feeding action of the screw shaft and the screw nut, so that the flow of fluid passing through the valve port is controlled. In order to limit the lowest end position of the needle valve in the valve closing direction and the highest end position of the needle valve in the valve opening direction in the flow control range, an upper end limit mechanism and a lower end limit mechanism for limiting the rotation positions of the magnet and the screw shaft are provided.
Because the upper end limiting mechanism of the electronic expansion valve is arranged between the upper cover component and the connecting and positioning mechanism to limit the upper end of the moving component, and the lower end limiting mechanism is arranged between the nut and the connecting and positioning mechanism to limit the lower end of the moving component. Therefore, the upper end limiting mechanism and the lower end limiting mechanism are not arranged on the magnet, the magnet is prevented from participating in braking, the durability of the magnet is improved, meanwhile, the electronic expansion valve is prevented from being blocked due to powder generated by abrasion when the magnet participates in braking, the service life and the reliability of a braking structure of the electronic expansion valve are improved, and the production cost of the electronic expansion valve is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 schematically illustrates a cross-sectional view of an electronic expansion valve of the present invention;
FIG. 2 is a schematic cross-sectional view showing the upper end limiting mechanism of the electronic expansion valve of the present invention in limiting operation;
FIG. 3 is a schematic cross-sectional view showing the lower end stop mechanism of the electronic expansion valve of the present invention in stop operation;
FIG. 4 schematically illustrates a perspective view of the electronic expansion valve of the present invention with the upper cover assembly and magnet removed;
fig. 5 schematically shows a perspective view of a stop plate in a first embodiment of the invention;
Fig. 6 schematically shows a perspective view of a connection plate in a first embodiment of the invention;
fig. 7 schematically shows a perspective view of a screw shaft in a first embodiment of the invention;
fig. 8 is a perspective view schematically showing a state where a magnet and a connection plate are fixedly connected together in the first embodiment of the present invention;
fig. 9 schematically shows a perspective view of a movement assembly in a first embodiment of the invention;
Fig. 10 schematically illustrates a perspective view of the motion assembly of the first embodiment of the present invention with the magnet removed;
FIG. 11 schematically illustrates a cross-sectional view of a motion assembly in a first embodiment of the invention;
fig. 12 schematically illustrates a perspective view of the inner cap of the present invention;
FIG. 13 schematically illustrates a cross-sectional view of the cap assembly of the present invention;
FIG. 14 is a perspective view schematically illustrating the stopper of the present invention being riveted to a connection plate;
Fig. 15 schematically shows a perspective view of a stopper plate in a second embodiment of the invention;
fig. 16 schematically shows a perspective view of a connection plate in a second embodiment of the invention;
fig. 17 schematically shows a perspective view of a screw shaft in a second embodiment of the invention;
fig. 18 schematically illustrates a perspective view of the motion assembly with the magnets removed in a second embodiment of the invention;
fig. 19 schematically shows a cross-sectional view of a movement assembly in a second embodiment of the invention.
Wherein the above figures include the following reference numerals:
10. A valve seat; 20. a valve body; 30. an upper cover assembly; 31. an inner cover; 32. a housing; 40. a nut; 50. a motion assembly; 51. a screw shaft; 511. a spacing outer flange; 5111. a limit plane; 512. a through hole; 52. a needle valve; 53. a magnet; 54. connecting a positioning mechanism; 541. a stop plate; 5411. a mounting hole; 5412. a limiting block; 542. a connecting plate; 5421. a groove; 5422. trimming; 5423. a connection hole; 5424. a relief through hole; 5425. a connecting block; 5426. a spring cover; 55. a spring; 60. an upper limit mechanism; 61. a first upper end limit part; 62. a second upper end limiting part; 70. a lower end limiting mechanism; 71. a first lower end limiting part; 72. a second lower end limiting part; 80. and a fixing plate.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
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 exemplary embodiments according to 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.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "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 "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.
Referring to fig. 1 to 19, according to an embodiment of the present invention, there is provided an electronic expansion valve including a valve seat 10, a valve body 20, an upper cover assembly 30, a nut 40, a moving assembly 50, an upper end stopper mechanism 60, a lower end stopper mechanism 70, and a coil part (not shown).
Wherein, the valve body 20 is arranged on the valve seat 10, the upper cover assembly 30 is arranged at one end of the valve body 20 far away from the valve seat 10 and forms a mounting cavity with the valve body 20; the nut 40 is fixedly arranged in the mounting cavity; the motion assembly 50 is arranged in the installation cavity and is positioned above the nut 40, the motion assembly 50 comprises a screw shaft 51, a needle valve 52, a magnet 53 and a connecting and positioning mechanism 54, the needle valve 52 is arranged on the screw shaft 51 in a penetrating way, the magnet 53 and the screw shaft 51 are fixedly connected together through the connecting and positioning mechanism 54, and the screw shaft 51 is in threaded connection with the nut 40 and is movably arranged along the axial direction of the nut 40; an upper end limiting mechanism 60 is disposed between the upper cover assembly 30 and the connection positioning mechanism 54 to limit the upper end of the moving assembly 50; a lower end stop mechanism 70 is disposed between the nut 40 and the connecting and positioning mechanism 54 to lower end stop the motion assembly 50.
In the actual use, the electronic expansion valve controls the rotation of the magnet 53 and the screw shaft 51 by applying a pulse current to the coil part, and advances and retreats the needle valve 52 inside the screw shaft 51 relative to the valve port on the valve seat 10 by the screw feeding action of the screw shaft 51 and the nut 40, thereby controlling the flow rate of the fluid passing through the valve port. In order to restrict the lowermost position of the needle valve 52 in the valve closing direction and the uppermost position of the needle valve 52 in the valve opening direction in the flow control range, an upper end stopper mechanism 60 and a lower end stopper mechanism 70 for restricting the rotational positions of the magnet 53 and the screw shaft 51 are provided.
As shown in fig. 1, two connection pipes, a valve body 20 and a valve seat 10 on the electronic expansion valve form a fluid circulation loop, and the structure is fixed by welding. The nut 40 is pressed into the valve body 20 by the fixing plate 80 and is fixed to the valve body 20.
Since the upper end limiting mechanism 60 of the electronic expansion valve in the present embodiment is disposed between the upper cover assembly 30 and the connection positioning mechanism 54 to limit the upper end of the moving assembly 50, and the lower end limiting mechanism 70 is disposed between the nut 40 and the connection positioning mechanism 54 to limit the lower end of the moving assembly 50. Therefore, the upper end limiting mechanism 60 and the lower end limiting mechanism 70 in the embodiment are not arranged on the magnet 53, so that the magnet 53 is prevented from participating in braking, the durability of the magnet 53 is improved, meanwhile, the electronic expansion valve is prevented from being blocked due to powder generated by abrasion when the magnet 53 participates in braking, the service life and the reliability of the braking structure of the electronic expansion valve in the embodiment are improved, and the production cost of the electronic expansion valve is reduced.
Referring to fig. 3, the lower end limiting mechanism 70 in the present embodiment includes a first lower end limiting portion 71 and a second lower end limiting portion 72, wherein the first lower end limiting portion 71 is disposed at the top end of the nut 40; the second lower end limiting portion 72 is disposed at the bottom of the connection positioning mechanism 54, and in operation, the first lower end limiting portion 71 and the second lower end limiting portion 72 are in contact to limit the lower end of the moving assembly 50.
Referring to fig. 3 and 5, the first lower end stopper 71 and the second lower end stopper 72 in the present embodiment are both stopper protrusions. Of course, in other embodiments of the present invention, the first lower end limiting portion 71 and the second lower end limiting portion 72 may be configured as a buckle, and any other modification forms under the concept of the present invention are within the scope of the present invention.
As shown in fig. 7, the screw shaft 51 in this embodiment is provided with a limiting outer flange 511, the connection positioning mechanism 54 includes a stop plate 541 and a connection plate 542, the stop plate 541 is provided with a mounting hole 5411, and when mounting, the screw shaft 51 is mounted in the mounting hole 5411 and is limited on the stop plate 541 by the limiting outer flange 511; the connection plate 542 is fixedly connected with the stop plate 541, and the magnet 53 is fixedly arranged with the connection plate 542, so that the needle valve 52 in the screw shaft 51 can advance and retreat relative to the valve port on the valve seat 10 under the feeding action of the screw thread of the nut 40.
Referring to fig. 5, in the first embodiment of the present invention, the second lower end restriction portion 72 is provided at the bottom of the stopper plate 541.
As shown in fig. 7, at least one stopper 5412 protruding from the upper surface of the stopper 541 is disposed on the stopper 541 in this embodiment, and a limiting plane 5111 adapted to the stopper 5412 is disposed on the outer periphery of the limiting outer flange 511, so as to prevent the screw shaft 51 from rotating relative to the stopper 541 in the circumferential direction.
Referring to fig. 6, 8, 9, 10 and 11, a groove 5421 is provided on a connection plate 542, the connection plate 542 is covered on a screw shaft 51, the top end of the screw shaft 51 is located in the groove 5421, a magnet 53 is a magnetic ring, the magnetic ring and the connection plate 542 are integrally injection molded, in this embodiment, the magnet and the connection plate 542 are integrally injection molded, the subsequent assembly is formed by welding the connection plate 542 with other parts, the process is simple, the structure is firm, and the damage of the magnet 53 caused by the direct participation of the magnet 53 in the assembly is avoided.
Preferably, the outer side edge of the connection plate 542 in this embodiment is provided with at least one cut-out 5422, so that the magnet 53 and the connection plate 542 cannot rotate circumferentially relative to each other after injection molding.
Referring to fig. 5 and 6, two limiting blocks 5412 in the first embodiment of the present invention are provided, two connecting holes 5423 are provided on the connection plate 542, and the two limiting blocks 5412 are welded in the two connecting holes 5423 in a one-to-one correspondence manner.
Referring to fig. 2,5, 6, 8, 9, 10 and 11, the upper limit mechanism 60 in the first embodiment of the present invention includes a first upper limit portion 61 and a second upper limit portion 62, wherein the first upper limit portion 61 is disposed on the upper cover assembly 30; the second upper end limiting portion 62 is disposed on the connection positioning mechanism 54, and when installed, the second upper end limiting portion 62 contacts the first upper end limiting portion 61 to limit the upper end of the moving assembly 50.
Preferably, the second upper end limiting portion 62 in the present embodiment is a limiting protrusion disposed on the upper surface of the stop plate 541 or the connection plate 542; the upper cap assembly 30 includes an outer shell 32 and an inner cap 31, and the first upper end stopper 61 is a stopper projection provided at an edge of the inner cap 31 and extending toward the inside of the inner cap 31.
In order to facilitate installation, the connecting plate 542 in this embodiment is provided with a yielding through hole 5424, and the limiting protruding strip is inserted into the yielding through hole 5424, so as to cooperate with the limiting protrusion on the inner cover 31 of the upper cover assembly 30 to limit the upper end of the moving assembly 50.
Preferably, the stop plate 541 and the connection plate 542 in the present embodiment are stainless steel sheet metal parts, and of course, in other embodiments of the present invention, the stop plate 541 and the connection plate 542 may be made of other materials with high structural strength, which is within the scope of the present invention.
Referring to fig. 1 to 13, the moving assembly 50 in the present embodiment further includes a spring 55, a through hole 512 extending in an axial direction of the screw shaft 51 is provided on the screw shaft 51, the needle valve 52 is installed in the through hole 512, and both ends of the spring 55 are respectively abutted against the bottom of the groove 5421 and the top end of the needle valve 52.
As can be seen from the above embodiments, the nut 40 of the present invention is pressed into the valve body 20 by the fixing plate 80, and is fixed relative to the valve body 20, and the uppermost end of the nut 40 has the first lower end limiting portion 71 extending outwards to form a fixed lower end limiter.
The moving assembly 50 is composed of a screw shaft 51, a needle valve 52, a spring 55, a stopper plate 541, a coupling plate 542, and a magnet 53. The concrete assembly mode is as follows: the stopper plate 541 is preferably constructed of a stainless steel sheet metal member, as shown in fig. 5, having 2 symmetrical shorter bent edges on one side, i.e., the second upper end stopper 62, and one longer bent edge, i.e., the second lower end stopper 72, on the other side, the longer bent edge constituting the movable second upper end stopper 62, and the other side having one shorter bent edge constituting the movable lower end stopper. The stop plate 541 and the screw shaft 51 are assembled first, the symmetrical 2 shorter bending edges of the stop plate 541 are matched with the two limit planes 5111 of the screw shaft 51 to prevent the screw shaft 51 and the stop plate 541 from rotating relatively in the circumferential direction, and then the needle valve 52 and the spring 55 are sequentially installed in the inner cavity of the screw shaft 51. As shown in FIG. 6, the structure of the connection plate 542 is that the magnet 53 and the connection plate 542 are integrally injection molded, the connection plate 542 is preferably a stainless steel sheet metal part, and 2 trimming edges 5422 are arranged on the outer circumference of the connection plate 542, so that the magnet 53 and the connection plate 542 cannot rotate relatively in the circumferential direction after injection molding. An integrated magnet 53 and a connection plate 542 are mounted on the former screw shaft 51. The 3 holes of the connection plate 542 correspond to the 3 bent sides of the stopper plate 541 upward. After the installation, the two short bent limiting blocks 5412 of the stop plate 541 and the connecting plate 542 are fixed by laser welding, and the screw shaft 51 and the magnet 53 are completely fixed relatively.
As shown in fig. 12, the inner lid 31 is configured such that a portion bent toward the center at the periphery constitutes a fixed upper end first upper end stopper 61, and the inner lid 31 is pressed into the top of the housing 32 and fixed by dotting on the housing 32, as shown in fig. 13.
The moving assembly 50 is assembled into the nut 40, screwed in, and then is assembled into the housing 32 of the inner cap 31 by welding and sealing, thereby completing the assembly of the electronic expansion valve.
In operation, the pulse current input from the coil drives the moving assembly 50 to move upward, and when the movable second upper end limiting portion 62 moving to the stop plate 541 is engaged with the fixed first upper end limiting portion 61 of the inner lid 31, the continued rotation of the magnet 53 is prevented, forming an upper limit.
The pulse current inputted from the coil drives the moving assembly 50 to move downward, and when the movable second lower end limiting part 72 moved to the stop plate 541 is engaged with the fixed first lower end limiting part 71 of the nut 40, the continued rotation of the magnet 53 is prevented, forming a lower limit.
Referring to fig. 14 to 19, according to a second embodiment of the present invention, there is provided an electronic expansion valve which is substantially the same as that of the first embodiment, except that the stop plate 541 and the connection plate 542 in the present embodiment are fixed together by riveting, specifically, the stopper 5412 is fixed in the connection hole 5423 by riveting, so that the structure is simple and easy to implement. The connection is less strong than the welded connection.
In addition, the second lower end limiting portion 72 in the present embodiment may be modified on the connection plate 542, and the connection plate 542 is divided into two parts, i.e., the connection plate 5425 and the spring cover 5426, which are finally fixed by laser welding, and the connection plate 542 is preferably manufactured by powder metallurgy. Compared with the optimal implementation mode, the structure has the advantages that the precision of the powder metallurgy is higher than that of the sheet metal part, the precision of the lower end limiting mechanism can be improved, the cost of the powder metallurgy part is higher, a part is added, and the overall cost is increased to some extent.
According to another aspect of the present invention, there is provided an air conditioner including an electronic expansion valve, the electronic expansion valve being the above-mentioned electronic expansion valve.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. The movable second lower end limiting part and the second upper end limiting part are both metal parts, so that the magnet is prevented from participating in stopping, the durability is improved, and meanwhile, the clamping caused by powder generated by abrasion when the magnet participates in stopping can be avoided;
2. The magnet and the connecting plate are integrally injection molded, the subsequent assembly is assembled and welded by the connecting plate and other parts, the process is simple, the structure is firm, and the magnet is prevented from being damaged due to the fact that the magnet directly participates in the assembly;
3. The moving assembly and the valve body assembly are easy to split, and the defective products only scrap the rotor assembly or the valve body assembly, and the other part is recycled, so that the cost is effectively reduced;
4. the magnet material contains rare earth materials, the cost is high, the structure can save the materials for the magnet and the screw shaft guide section, and the cost can be effectively reduced.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (16)
1. An electronic expansion valve, comprising:
The valve comprises a valve seat (10), a valve body (20) and an upper cover assembly (30), wherein the valve body (20) is arranged on the valve seat (10), and the upper cover assembly (30) is arranged at one end, far away from the valve seat (10), of the valve body (20) and forms a mounting cavity with the valve body (20) in a surrounding mode;
-a nut (40), said nut (40) being fixedly mounted within said mounting cavity;
The motion assembly (50) is arranged in the mounting cavity and is positioned above the nut (40), the motion assembly (50) comprises a screw shaft (51), a needle valve (52), a magnet (53) and a connecting and positioning mechanism (54), the needle valve (52) is arranged on the screw shaft (51) in a penetrating mode, the magnet (53) and the screw shaft (51) are fixedly connected together through the connecting and positioning mechanism (54), and the screw shaft (51) is in threaded connection with the nut (40) and is movably arranged along the axial direction of the nut (40);
an upper end limiting mechanism (60), wherein the upper end limiting mechanism (60) is arranged between the upper cover assembly (30) and the connecting and positioning mechanism (54) so as to limit the upper end of the moving assembly (50);
A lower end limiting mechanism (70), wherein the lower end limiting mechanism (70) is arranged between the nut (40) and the connecting and positioning mechanism (54) so as to limit the lower end of the moving assembly (50);
The connection positioning mechanism (54) includes: a stop plate (541) on which the screw shaft (51) is mounted and defined;
a connection plate (542), wherein the connection plate (542) is fixedly connected with the stop plate (541), and the magnet (53) is fixedly arranged with the connection plate (542);
A limiting outer flange (511) is arranged on the screw shaft (51); the stop plate (541) is provided with a mounting hole (5411), and the screw shaft (51) is mounted in the mounting hole (5411) and is limited on the stop plate (541) through the limiting outer flange (511).
2. The electronic expansion valve according to claim 1, wherein the lower end limiting mechanism (70) includes:
a first lower end limiting part (71), wherein the first lower end limiting part (71) is arranged at the top end of the nut (40);
The second lower end limiting part (72), the second lower end limiting part (72) is arranged at the bottom of the connecting and positioning mechanism (54), and the first lower end limiting part (71) is contacted with the second lower end limiting part (72) to limit the lower end of the moving assembly (50).
3. The electronic expansion valve according to claim 2, wherein the first lower end limiting portion (71) and the second lower end limiting portion (72) are both limiting protrusions.
4. An electronic expansion valve according to claim 3, wherein the second lower end limit portion (72) is provided at the bottom of the stopper plate (541) or the connection plate (542).
5. The electronic expansion valve according to claim 4, wherein at least one stopper (5412) protruding from the upper surface of the stopper plate (541) is provided on the stopper plate (541), and a stopper plane (5111) adapted to the stopper (5412) is provided on the outer periphery of the stopper outer flange (511).
6. The electronic expansion valve according to claim 5, wherein the connection plate (542) is provided with a groove (5421), the connection plate (542) is covered on the screw shaft (51), the top end of the screw shaft (51) is located in the groove (5421), and the magnet (53) is a magnetic ring, and the magnetic ring and the connection plate (542) are integrally injection-molded.
7. The electronic expansion valve of claim 6, wherein the outer side of the connection plate (542) is provided with at least one cut edge (5422).
8. The electronic expansion valve according to claim 5, wherein the number of the limiting blocks (5412) is two, two connecting holes (5423) are formed in the connecting plate (542), and the two limiting blocks (5412) are riveted or welded in the two connecting holes (5423) in a one-to-one correspondence manner.
9. The electronic expansion valve according to claim 4, wherein the upper end stop mechanism (60) includes:
A first upper end limit portion (61), the first upper end limit portion (61) being provided on the upper cover assembly (30);
the second upper end limiting part (62), the second upper end limiting part (62) is arranged on the stop plate (541), and the second upper end limiting part (62) is in contact with the first upper end limiting part (61) so as to limit the upper end of the motion assembly (50).
10. The electronic expansion valve according to claim 9, wherein the second upper end limit portion (62) is a limit ridge provided on an upper surface of the stopper plate (541);
The upper cover assembly (30) comprises a shell (32) and an inner cover (31), and the first upper end limiting part (61) is a limiting projection which is arranged at the edge of the inner cover (31) and extends towards the inner part of the inner cover (31).
11. The electronic expansion valve according to claim 10, wherein the connection plate (542) is provided with a relief through hole (5424), and the limit protruding strip is inserted into the relief through hole (5424).
12. The electronic expansion valve of claim 4, wherein the stop plate (541) is a stainless steel sheet metal member.
13. The electronic expansion valve according to claim 6, wherein the moving assembly (50) further comprises a spring (55), a through hole (512) extending along the axial direction of the screw shaft (51) is arranged on the screw shaft (51), the needle valve (52) is installed in the through hole (512), and two ends of the spring (55) respectively abut against the bottom of the groove (5421) and the top end of the needle valve (52).
14. The electronic expansion valve according to claim 4, wherein the moving assembly (50) further comprises a spring (55), a through hole (512) extending along the axial direction of the screw shaft (51) is formed in the screw shaft (51), the needle valve (52) is installed in the through hole (512), the connection plate (542) comprises a connection block (5425) and a spring cover (5426) welded on the connection block (5425), and two ends of the spring (55) respectively abut against the bottom of the spring cover (5426) and the top end of the needle valve (52).
15. The electronic expansion valve of claim 14, wherein the connection plate (542) is made of stainless steel sheet metal or powder metallurgy.
16. An air conditioner comprising an electronic expansion valve, wherein the electronic expansion valve is the electronic expansion valve of any one of claims 1 to 15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205278.0A CN108386585B (en) | 2018-03-13 | 2018-03-13 | Electronic expansion valve and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205278.0A CN108386585B (en) | 2018-03-13 | 2018-03-13 | Electronic expansion valve and air conditioner |
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| Publication Number | Publication Date |
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| CN108386585A CN108386585A (en) | 2018-08-10 |
| CN108386585B true CN108386585B (en) | 2024-06-14 |
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| CN201810205278.0A Active CN108386585B (en) | 2018-03-13 | 2018-03-13 | Electronic expansion valve and air conditioner |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524232A (en) * | 2019-08-16 | 2019-12-03 | 珠海励高精工制造有限公司 | A kind of valve rod fills O-ring device and method automatically |
| CN112901790B (en) * | 2019-11-19 | 2022-05-10 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN113969985B (en) * | 2020-07-24 | 2024-05-17 | 浙江智汇汽车热管理科技有限公司 | Electronic expansion valve |
| EP3998210B1 (en) * | 2021-02-19 | 2023-09-13 | Lilium eAircraft GmbH | Valve apparatus for controlling a fluid flow through a duct or opening of an air conditioning system of an aircraft |
| EP4047249B1 (en) * | 2021-02-19 | 2024-05-08 | Alfred Gaile | Valve apparatus for controlling a fluid flow through a duct or opening |
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| CN102313061A (en) * | 2010-06-29 | 2012-01-11 | 株式会社不二工机 | Mortor operated valve |
| KR20130116521A (en) * | 2012-04-16 | 2013-10-24 | 이종천 | Electronic expansion valve |
| CN208010998U (en) * | 2018-03-13 | 2018-10-26 | 珠海励高精工制造有限公司 | Electric expansion valve and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102213509B (en) * | 2011-06-02 | 2017-04-12 | 上海俊乐制冷自控元件有限公司 | Electronic expansion valve |
| CN103807486A (en) * | 2014-02-19 | 2014-05-21 | 碧茂科技（苏州）有限公司 | Limiting structure for rotor of expansion valve body |
| CN203743578U (en) * | 2014-02-19 | 2014-07-30 | 碧茂科技（苏州）有限公司 | Limiting structure of expansion-valve valve body rotor |
| CN104061363B (en) * | 2014-06-11 | 2017-01-25 | 珠海格力电器股份有限公司 | Limit structure and electronic expansion valve |
| CN105241131B (en) * | 2014-06-17 | 2019-06-04 | 浙江盾安人工环境股份有限公司 | Electric expansion valve |
| CN106763989B (en) * | 2015-11-25 | 2019-11-12 | 浙江盾安人工环境股份有限公司 | Electric expansion valve |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313061A (en) * | 2010-06-29 | 2012-01-11 | 株式会社不二工机 | Mortor operated valve |
| KR20130116521A (en) * | 2012-04-16 | 2013-10-24 | 이종천 | Electronic expansion valve |
| CN208010998U (en) * | 2018-03-13 | 2018-10-26 | 珠海励高精工制造有限公司 | Electric expansion valve and air conditioner |
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| CN108386585A (en) | 2018-08-10 |
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Effective date of registration: 20230912 Address after: 311835 Diankou Industrial Zone, Zhuji City, Shaoxing City, Zhejiang Province Applicant after: ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT Co.,Ltd. Address before: No.2 workshop of Zhuhai Lingda Compressor Co., Ltd., no.2097, Jiuzhou Avenue, Zhuhai, Guangdong 519000 Applicant before: ZHUHAI LIGAO PRECISION MANUFACTURING CO.,LTD. Applicant before: GREE ELECTRIC APPLIANCES Inc. OF ZHUHAI |
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