CN116625032A - Electronic expansion valve and refrigeration equipment - Google Patents

Electronic expansion valve and refrigeration equipment Download PDF

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Publication number
CN116625032A
CN116625032A CN202310648454.9A CN202310648454A CN116625032A CN 116625032 A CN116625032 A CN 116625032A CN 202310648454 A CN202310648454 A CN 202310648454A CN 116625032 A CN116625032 A CN 116625032A
Authority
CN
China
Prior art keywords
valve
section
segment
nut
electronic expansion
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
Application number
CN202310648454.9A
Other languages
Chinese (zh)
Inventor
杨茂
陈超
黄龙华
刘振超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Welling Motor Manufacturing Co Ltd
Original Assignee
Guangdong Welling Motor Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Welling Motor Manufacturing Co Ltd filed Critical Guangdong Welling Motor Manufacturing Co Ltd
Priority to CN202310648454.9A priority Critical patent/CN116625032A/en
Publication of CN116625032A publication Critical patent/CN116625032A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F16K1/02—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 with screw-spindle
    • F16K1/04—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 with screw-spindle with a cut-off member rigid with the spindle, e.g. main 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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • 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)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The application discloses an electronic expansion valve and refrigeration equipment. The electronic expansion valve comprises a valve seat, a nut, a valve needle and a magnetic rotor. The nut is fixedly connected to the valve seat and surrounds the valve seat to form a refrigerant cavity, the lower surface of the nut is provided with a guide part, the nut is provided with a mounting hole communicated with the refrigerant cavity, the mounting hole penetrates through the guide part, at least part of the mounting hole is a threaded hole section, and the valve seat and valve needle are integrally provided with a valve port communicated with the refrigerant cavity; the outer peripheral surface of the valve needle is provided with a thread section, the valve needle is of an integrated structure, extends into the refrigerant cavity from the mounting hole and is in threaded connection with the mounting hole; the magnetic rotor is sleeved on the valve needle outside the refrigerant cavity and can drive the valve needle to rotate relative to the nut so that the valve needle can lift in the mounting hole and be inserted into the valve port or separated from the valve port. The technical scheme of the application can simplify the structure of the electronic expansion valve, thereby reducing the manufacturing cost.

Description

Electronic expansion valve and refrigeration equipment
The application is a divisional application with the application number of 202110743286.2, and the application date of the main application is as follows: 2021, 06, 30; the application is named as follows: an electronic expansion valve and a refrigeration device.
Technical Field
The application relates to the technical field of control valves, in particular to an electronic expansion valve and refrigeration equipment using the same.
Background
In the related art, the electronic expansion valve mainly comprises a valve seat, a rotor, a screw rod, a nut and a valve needle, wherein the screw rod is rotationally connected with the nut, the valve needle is arranged at the lower end of the screw rod, the magnetic rotor drives the screw rod to axially move, and then the valve needle is driven to axially move, so that a valve port on the valve seat is plugged or opened. However, the electronic expansion valve is characterized in that the valve needle is driven by the additionally arranged screw rod to close and open the valve port, so that parts of the electronic expansion valve are relatively more, the structure is relatively more complex, and the manufacturing cost of the electronic expansion valve is increased.
Disclosure of Invention
The invention mainly aims to provide an electronic expansion valve, which aims to simplify the structure of the electronic expansion valve so as to reduce the manufacturing cost.
In order to achieve the above object, an electronic expansion valve according to the present invention includes:
a valve seat;
the nut is fixedly connected to the valve seat and surrounds the valve seat to form a refrigerant cavity, a guide part is arranged on the lower surface of the nut, a mounting hole communicated with the refrigerant cavity is formed in the nut, the mounting hole penetrates through the guide part, at least part of the mounting hole is a threaded hole section, and the valve seat is provided with a valve port communicated with the refrigerant cavity;
The valve needle is of an integrated structure, a threaded section is arranged on the outer peripheral surface of the valve needle, and the valve needle extends into the refrigerant cavity from the mounting hole and is in threaded connection with the mounting hole; and
the magnetic rotor is sleeved on the valve needle outside the refrigerant cavity and can drive the valve needle to rotate relative to the nut so as to enable the valve needle to lift in the mounting hole and insert into the valve port or separate from the valve port.
In an embodiment, the electronic expansion valve further includes a refrigerant inlet pipe, the refrigerant inlet pipe is communicated with the refrigerant cavity, and an outlet of the refrigerant inlet pipe faces the valve needle located in the refrigerant cavity.
In an embodiment, in a direction that the valve needle is close to the valve port, the valve needle sequentially comprises a first section body, a second section body and a third section body, the valve needle further comprises a fixed section body, the fixed section body is connected to one end of the first section body, which is far away from the second section body, the magnetic rotor is sleeved on the fixed section body, the outer circumferential surface of the second section body is a threaded section, and the third section body can be inserted into the refrigerant cavity;
the mounting hole sequentially comprises a first hole section, a second hole section and a third hole section, wherein the second hole section is a threaded hole section, the first section body is matched with the first hole section, the second section body is matched with the second hole section, and the third section body is matched with the third hole section so that the valve needle can move along the axial direction of the threaded hole section.
In an embodiment of the present invention, the diameter of the first segment is defined as d1, the diameter of the second segment is defined as d2, and the diameter of the third segment is defined as d3, where the relationship: d1 > d2 > d3.
In one embodiment of the present invention, the valve needle further comprises an insertion section connected to an end of the third section remote from the second section, wherein the diameter of the insertion section is smaller than that of the third section, and the insertion section can be inserted into the valve port.
In one embodiment of the invention, a gap is provided between the insertion section and the valve port when the insertion section is inserted into the valve port.
In one embodiment of the present invention, the insertion section includes:
the constant diameter section is connected to one end of the third section body, which is far away from the second section body, and can be inserted into the valve port, and a gap is reserved between the constant diameter section and the valve port; and
the conical section is connected to one end of the equal-diameter section, which is far away from the third section body, and the area of the cross section of the conical section is reduced in the direction that the valve needle is close to the valve port, and a gap is reserved between the conical section and the valve port.
In one embodiment of the present invention, the valve needle further comprises a fixed segment connected to an end of the first segment remote from the second segment, and the diameter of the fixed segment is smaller than that of the first segment;
the magnetic rotor is sleeved on the fixed section body and is abutted to the surface of the first section body, which is far away from the second section body.
In one embodiment of the invention, the magnetic rotor comprises:
the magnetic body is of a cylindrical structure with openings at two ends; and
the limiting plate is connected to the inner side wall of the magnetic body, and is sleeved on the valve needle outside the refrigerant cavity, and the magnetic body drives the valve needle to rotate relative to the nut through the limiting plate.
In an embodiment of the invention, a guide rail is arranged on the outer side wall of the nut, the guide rail is spirally extended in the direction of the valve needle approaching the valve port, and the electronic expansion valve further comprises a sliding piece, and a part of the sliding piece is embedded in the guide rail and can slide along the extending direction of the guide rail;
the magnetic rotor further comprises an abutting piece, the abutting piece is connected to the limiting plate, and when the magnetic rotor drives the valve needle to rotate relative to the nut, the abutting piece abuts against and drives the sliding piece.
In an embodiment of the invention, the electronic expansion valve further comprises a spring, wherein the spring is sleeved on the nut and surrounds the nut to form a guide rail;
the sliding part comprises a ring body and an extension rod, wherein the ring body is spirally arranged and positioned in the guide rail, and the extension rod is connected with the ring body and can be driven by the abutting part in an abutting mode.
In an embodiment of the invention, the electronic expansion valve further comprises a housing, wherein the housing is a cylindrical structure with one end open, and is connected to the valve seat and covers the nut, the valve needle and the magnetic rotor;
and/or the electronic expansion valve further comprises a refrigerant inlet pipe and a refrigerant outlet pipe, wherein the refrigerant inlet pipe is communicated with the refrigerant cavity, and the refrigerant outlet pipe is communicated with the valve port.
The invention also proposes a refrigeration device comprising an electronic expansion valve comprising:
a valve seat;
the nut is fixedly connected to the valve seat and surrounds the valve seat to form a refrigerant cavity, a guide part is arranged on the lower surface of the nut, a mounting hole communicated with the refrigerant cavity is formed in the nut, the mounting hole penetrates through the guide part, at least part of the mounting hole is a threaded hole section, and the valve seat is provided with a valve port communicated with the refrigerant cavity;
The valve needle is of an integrated structure, a threaded section is arranged on the outer peripheral surface of the valve needle, and the valve needle extends into the refrigerant cavity from the mounting hole and is in threaded connection with the mounting hole; and
the magnetic rotor is sleeved on the valve needle outside the refrigerant cavity and can drive the valve needle to rotate relative to the nut so as to enable the valve needle to lift in the mounting hole and insert into the valve port or separate from the valve port.
When the electronic expansion valve is used, the magnetic rotor can sense the electromagnetic force rotation motion of the coil component and drive the valve needle to rotate relative to the nut. Because the valve needle and the nut are in threaded fit, the valve needle can slide axially in the rotating process, namely, the valve needle can lift along the valve port close to or far away from the valve seat in the mounting hole. The valve needle can be inserted into or separated from the valve port, so that the closing and opening of the electronic expansion valve are controlled.
In addition, the valve needle of the electronic expansion valve is provided with the thread section, so that the electronic expansion valve can be directly matched with the nut in a threaded manner. Compared with the prior art, the electronic expansion valve drives the valve needle to close and open the valve port through the threaded fit of the additionally arranged screw rod and the nut, so that parts of the electronic expansion valve are relatively more and the structure is relatively more complex. The electronic expansion valve in the scheme does not need to additionally arrange a screw rod to drive the valve needle, so that the number of parts of the electronic expansion valve can be reduced, the structure is relatively simple, and the manufacturing cost of the electronic expansion valve is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an electronic expansion valve according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic view of an exploded view of the valve pin and nut of the electronic expansion valve of FIG. 1;
FIG. 4 is a schematic view of a slider of the electronic expansion valve of FIG. 1;
fig. 5 is a schematic diagram illustrating an assembly process of the electronic expansion valve in fig. 1.
Reference numerals illustrate:
reference numerals Name of the name Reference numerals Name of the name
100 Electronic expansion valve 373 Conical section
10 Valve seat 375 Transition section
11 Valve port 377 Needle-shaped section
20 Nut 39 Fixed section body
21 Mounting hole 40 Magnetic rotor
211 A first hole section 41 Magnetic body
213 A second hole section 43 Limiting plate
215 Third hole section 45 Abutting piece
22 Connecting sheet 451 Connecting plate
23 Guide rail 453 Abutting plate
25 Clamping groove 50 Spring
101 Refrigerant cavity 60 Sliding piece
30 Valve needle 61 Ring body
31 First segment body 63 Extension rod
33 Second segment body 70 Outer cover
35 Third segment body 80 Refrigerant inlet pipe
37 Insertion section 90 Refrigerant outlet pipe
371 Constant diameter section 20a Guide part
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, the present invention provides an electronic expansion valve 100 that can be used to control the flow of a refrigerant in a refrigeration device.
In one embodiment of the present invention, the electronic expansion valve 100 includes a valve seat 10, a nut 20, a valve needle 30, and a magnetic rotor 40. The nut 20 is fixedly connected to the valve seat 10 and surrounds the valve seat 10 to form a refrigerant cavity 101, the nut 20 is provided with a mounting hole 21 communicated with the refrigerant cavity 101, at least part of the mounting hole 21 is a threaded hole section, and the valve seat 10 is provided with a valve port 11 communicated with the refrigerant cavity 101; the outer peripheral surface of the valve needle 30 is provided with a thread section, and the valve needle 30 extends into the refrigerant cavity 101 from the mounting hole 21 and is in threaded connection with the mounting hole 21; the magnetic rotor 40 is sleeved on the valve needle 30 outside the refrigerant cavity 101 and can drive the valve needle 30 to rotate relative to the nut 20, so that the valve needle 30 can lift in the mounting hole 21 and be inserted into the valve port 11 or separated from the valve port 11.
In one embodiment of the present application, the valve seat 10 may be used to mount and carry the components of the nut 20, the valve needle 30, the magnetic rotor 40, etc., so that the components of the electronic expansion valve 100 may be assembled to form a single unit. The valve seat 10 may have a cylindrical structure having openings at both ends, one of which may be formed as the valve port 11 and the other of which is covered by the nut 20. The valve seat 10 may have a circular shape, so that the valve seat is regular in shape and easy to manufacture. Of course, the present application is not limited thereto, and in other embodiments, the valve seat 10 may have a square structure or other shape structure. The nut 20 can be used for enclosing with the valve seat 10 to form a refrigerant cavity 101, and meanwhile, the mounting hole 21 on the nut 20 can be arranged coaxially with the valve port 11 on the valve seat 10, so that the valve needle 30 can be accurately inserted into the valve port 11 subsequently. The nut 20 may be disposed entirely outside the valve seat 10, or may be partially inserted into an opening formed in the valve seat 10 at an end thereof remote from the valve port 11. This increases the contact area between the nut 20 and the valve seat 10, which is advantageous in improving the stability of the connection between the two and the seal. Further, the nut 20 may be further sleeved with a connecting piece 22, and the connecting piece 22 may cover the connection between the nut 20 and the valve seat 10, so as to further improve the tightness of the connection between the nut 20 and the valve seat 10. The connecting piece 22 and the nut 20 can be embedded into the outer peripheral surface of the nut 20 to realize the clamping and fixing of the two, and can be fixed with the nut 20 by welding to ensure better connection stability of the two. In addition, the shape of the nut 20 may be a circular structure, so that the shape is regular and is convenient for processing and forming, and meanwhile, the volume of the nut is relatively small, which is beneficial to reducing the occupation of space. The mounting hole 21 of the nut 20 may be partially formed as a screw hole section, and in this case, the upper end, the middle portion or the lower end of the mounting hole 21 may be formed as a screw hole section. Of course, the upper, middle or lower ends of the mounting holes 21 may be formed as screw hole segments. One end of the valve needle 30 may be inserted into the mounting hole 21 and be screwed with the mounting hole 21. The valve needle 30 extending into the refrigerant cavity 101 from the mounting hole 21 can be inserted into the valve port 11 to completely close the valve port 11 (i.e. the valve needle 30 is tightly attached to the valve port 11 so that the refrigerant cannot pass through) or partially close (i.e. a gap is formed between the valve needle 30 and the valve port 11 so that the refrigerant can pass through in small amount); and may be disengaged from the valve port 11 to fully open the valve port 11. The magnetic rotor 40 may be used to provide power so that the valve needle 30 may rotate relative to the nut 20. Specifically, a coil member may be provided on the outer side of the magnetic rotor 40, and the magnetic rotor 40 may sense the electromagnetic force rotation motion of the coil member. The valve needle 30 and the magnetic rotor 40 have a connection relationship to synchronously rotate, and the lifting movement along the direction approaching or separating from the valve port 11 is realized under the action of the threaded cooperation of the nut 20 section on the valve needle 30 and the mounting hole 21 on the nut 20, so that the insertion and separation of the valve port 11 are realized. The magnetic rotor 40 may have a cylindrical structure with an opening at one end, so that the shape of the magnetic rotor is adapted to the rotation track, and the possibility of interference during the movement process may be reduced.
When the electronic expansion valve 100 of the present invention is in use, the magnetic rotor 40 can sense the electromagnetic force of the coil component to rotate and drive the valve needle 30 to rotate relative to the nut 20. Because the valve needle 30 is in threaded engagement with the nut 20, the valve needle 30 is more capable of sliding axially during rotation, i.e., lifting and lowering along the valve port 11 in the mounting hole 21 near or far from the valve seat 10. Such that the needle 30 can be inserted into the valve port 11 or removed from the valve port 11, thereby achieving control of closing and opening of the electronic expansion valve 100.
In addition, in the scheme, the valve needle 30 of the electronic expansion valve 100 is provided with a thread section, so that the electronic expansion valve can be directly in threaded fit with the nut 20. Compared with the prior art in which the electronic expansion valve 100 is in threaded engagement with the nut 20 through the additionally provided screw rod, the valve needle 30 is driven to close and open the valve port 11, so that the electronic expansion valve 100 has relatively more parts and relatively more complex structure. The electronic expansion valve 100 in the scheme does not need to additionally provide a screw rod to drive the valve needle 30, so that the number of parts of the electronic expansion valve 100 can be reduced to enable the structure to be relatively simple, and the manufacturing cost of the electronic expansion valve 100 can be reduced.
Referring to fig. 1 and 3 in combination, in an embodiment of the present application, in a direction of the valve needle 30 approaching the valve port 11, the valve needle 30 sequentially includes a first segment 31, a second segment 33, and a third segment 35, the magnetic rotor 40 is sleeved on the first segment 31, an outer circumferential surface of the second segment 33 is a threaded segment, and the third segment 35 can be inserted into the valve port 11; the mounting hole 21 sequentially comprises a first hole section 211, a second hole section 213 and a third hole section 215, the second hole section 213 is a threaded hole section, the first section 31 is matched with the first hole section 211, the second section 33 is matched with the second hole section 213, and the third section 35 is matched with the third hole section 215.
It can be appreciated that the outer circumferential surface of the second section of the valve needle 30 is a threaded section, so that the length of the threaded section is not too long, and the two sections are convenient for rapidly completing the screwing process, thereby being beneficial to improving the convenience of installation of the valve needle 30. Meanwhile, since the second segment 33 is located at the middle of the valve needle 30, the valve needle 30 and the mounting hole 21 can be connected at the middle position. This is advantageous in that the locking force between the needle 30 and the mounting hole 21 is distributed more uniformly over the needle 30, thereby improving the stability of the installation of the needle 30 as a whole on the nut 20. Of course, the present application is not limited to this, and in other embodiments, the outer circumferential surface of the first segment 31 may be a threaded segment, and the first mounting hole 21 may be a threaded segment. Alternatively, the outer circumferential surfaces of the first segment 31 and the second segment 33 are screw thread segments, and the first mounting hole 21 and the second mounting hole 21 are screw thread segments.
Referring to fig. 3, in an embodiment of the present application, a diameter d1 of the first segment 31, a diameter d2 of the second segment 33, and a diameter d3 of the third segment 35 are defined, so as to satisfy the following relationships: d1 > d2 > d3.
It will be appreciated that since the diameters of the first segment 31, the second segment 33 and the third segment 35 are sequentially reduced (in this case, the diameters of the first hole segment 211, the second hole segment 213 and the third hole segment 215 are also sequentially reduced), the valve needle 30 can extend one end of the third segment 35 into the refrigerant chamber 101 from top to bottom through the mounting hole 21, so as to achieve relatively quick installation. Moreover, the valve needle 30 can be penetrated into the nut 20 after the nut 20 and the valve seat 10 are installed, so that the influence on the installation of the subsequent nut 20 and the valve seat 10 caused by the fact that the valve needle 30 is penetrated into the nut 20 is avoided. Of course, the present application is not limited thereto, and in other embodiments, the diameter d1 of the first segment 31, the diameter d2 of the second segment 33, and the diameter d3 of the third segment 35 may be the same. Alternatively, d1 < d2 < d3.
Referring to fig. 1, 2 and 3 in combination, in an embodiment of the present application, the valve needle 30 further includes an insertion section 37, the insertion section 37 is connected to an end of the third section 35 away from the second section 33, and the diameter of the insertion section 37 is smaller than that of the third section 35 and can be inserted into the valve port 11.
It will be appreciated that, due to the relatively small size of the valve port 11 typically provided, the valve needle 30 now includes an insertion section 37 and is inserted into the valve port 11 through the insertion section 37. Thus, the diameters of the first segment 31, the second segment 33 and the third segment 35 of the valve needle 30 can be relatively larger (i.e. larger than the valve port 11), so as to increase the overall strength of the valve needle 30, thereby being beneficial to prolonging the service life of the valve needle 30. Further, when the second segment 33 of the needle 30 is provided relatively large, it is convenient to form a thread segment on the needle 30, thereby improving convenience in manufacturing and processing thereof. Of course, it should be noted that the present application is not limited thereto, and in other embodiments, when the valve needle 30 does not include the insertion section 37, the diameter of the second section 33 may be set to be relatively small.
Referring to fig. 2, in an embodiment of the application, when the insertion section 37 is inserted into the valve port 11, a gap is formed between the insertion section 37 and the valve port 11.
In some systems, especially in a household one-to-one air conditioning system, if the electronic expansion valve 100 fails in the fully closed state, the refrigeration circuit is easily partially evacuated, and thus the compressor is damaged or even the entire refrigeration system is damaged. Therefore, when the insertion section 37 is inserted into the valve port 11, the gap is provided between the insertion section 37 and the valve port 11, so that the refrigerant in the refrigerant chamber 101 can still pass through a certain amount through the gap between the insertion section 37 and the valve port 11 when the electronic expansion valve 100 is in the closed state, and the problem of vacuum in the refrigerating system caused by continuous operation of the compressor when the electronic expansion valve 100 is in the closed state is solved. Here, the insertion section 37 may have a gap between the valve port 11 and each part in the circumferential direction, or the insertion section 37 may have a gap between the valve port 11 and a part of the insertion section 37. In other embodiments, the insertion section 37 may completely seal the valve port 11 after the valve port 11 is inserted.
Referring to fig. 2, in an embodiment of the present invention, the insertion section 37 includes a constant diameter section 371 and a tapered section 373, the constant diameter section 371 is connected to one end of the third section 35 far away from the second section 33, the constant diameter section 371 can be inserted into the valve port 11, and a gap is provided between the constant diameter section 371 and the valve port 11; the tapered section 373 is connected to an end of the constant diameter section 371 away from the third section body 35, and in a direction in which the valve needle 30 approaches the valve port 11, an area of a cross section of the tapered section 373 is reduced, and a gap is provided between the tapered section 373 and the valve port 11.
It will be appreciated that the provision of the constant diameter segment 371 maintains a gap between the insert segment 37 and the valve port 11 after being inserted into the valve port 11, thereby realizing that a portion of the refrigerant still passes through the valve port 11 when the electronic expansion valve 100 is in the closed state. The tapered section 373 is arranged, so that the size of a gap between the valve needle 30 and the valve port 11 can be changed through the tapered section 373 in the lifting process of the valve needle 30 driven by the magnetic rotor 40, and the flow of the valve port 11 is adjusted. Further, the insert section 37 further includes a transition section 375, and opposite ends of the transition section 375 are connected to the third section 35 and the constant diameter section 371, respectively. At this time, since the diameters of the constant diameter section 371 and the tapered section 373 are relatively small, the valve needle 30 can be made to have a more uniform diameter by connecting the transition section 375 to the third section body 35, which is advantageous for ensuring uniformity of strength everywhere. The transition section 375 may have a cylindrical portion and a conical portion in this order in the direction of the valve needle 30 approaching the valve port 11, the cross section of the conical portion being arranged to decrease in the direction of the valve needle 30 approaching the valve port 11. Therefore, the transition part has certain diameter, ensures the strength and has better transitional connection effect. At this time, the end of the mounting hole 21, which is close to the refrigerant cavity 101, may be in a flared shape, so as to better correspond to the conical portion of the transition section 375, and at the same time, play a role in guiding the refrigerant in the refrigerant cavity 101. Similarly, the end of the mounting hole 21 away from the refrigerant chamber 101 may be formed in a flared shape, so that the refrigerant can flow out faster after passing through the gap between the tapered section 373 of the insertion section 37 and the valve port 11. Of course, the transition 375 may also be a cylindrical or conical portion only in the direction of the valve needle 30 approaching the valve port 11. Still further, the insert segment 37 may also include a needle segment 377, the needle segment 377 being connected to an end of the taper distal from the constant diameter segment 371 to avoid the valve needle 30 forming a sharp edge at the end that is susceptible to damage. In addition, in other embodiments, the insertion section 37 may include only the constant diameter section 371 or the tapered section 373.
Referring to fig. 1, in an embodiment of the present invention, the valve needle 30 further includes a fixed segment 39, the fixed segment 39 is connected to an end of the first segment 31 away from the second segment 33, and a diameter of the fixed segment 39 is smaller than a diameter of the first segment 31; the magnetic rotor 40 is sleeved on the fixed section 39 and is abutted against the surface of the first section 31 far away from the second section 33.
It will be appreciated that, since the diameter of the fixed segment 39 is smaller than the diameter of the first segment 31, the surface of the first segment 31 remote from the second segment 33 may form a limiting step. So on locating fixed section body 39 with magnetic rotor 40 cover, can play spacing support effect to magnetic rotor 40 through spacing step to be convenient for with the accurate installation of magnetic rotor 40 in predetermineeing the mounted position, also can improve the stability of magnetic rotor 40 installation simultaneously. Of course, when the valve needle 30 does not include the fixed segment 39, the magnetic rotor 40 may be directly sleeved on the first segment 31. In one embodiment, the valve needle 30 may include a fixed segment 39, a first segment 31, a second segment 33, a third segment 35 and an insertion segment 37, where the fixed segment 39, the first segment 31, the second segment 33, the third segment 35 and the insertion segment 37 may be integrally formed to ensure the overall strength of the valve needle 30 and simplify the processing process thereof to improve the production efficiency.
Referring to fig. 1, in an embodiment of the present invention, a magnetic rotor 40 includes a magnetic body 41 and a limiting plate 43, wherein the magnetic body 41 has a cylindrical structure with two ends open; the limiting plate 43 is connected to the inner side wall of the magnetic body 41 and sleeved on the valve needle 30 outside the refrigerant cavity 101, and the magnetic body 41 drives the valve needle 30 to rotate relative to the nut 20 through the limiting plate 43.
It will be appreciated that the magnetic rotor 40 is formed of the magnetic body 41 and the limiting plate 43, so that the two can be manufactured separately and independently, and then assembled to form a whole body of the rotor after each is formed, thereby facilitating the manufacturing and processing thereof. The limiting plate 43 may have a circular structure, and is inserted into the inner circumferential surface of the magnetic body 41 to be fastened. In the case where the valve needle 30 includes only the first segment 31, the second segment 33, and the third segment 35, the limiting plate 43 may be sleeved on the first segment 31. When the valve needle 30 further includes a fixed segment 39, the limiting plate 43 may be sleeved on the fixed segment 39. In addition, in other embodiments, the magnetic rotor 40 includes a magnetic body 41 and a connecting rod, the magnetic body 41 is sleeved on the valve needle 30, and the connecting rod is also possible to connect the valve needle 30 and the magnetic body 41.
Referring to fig. 1, in an embodiment of the present invention, a guide rail 23 is disposed on an outer side wall of the nut 20, the guide rail 23 is spirally extended along a direction of the valve needle 30 approaching the valve port 11, the electronic expansion valve 100 further includes a sliding member 60, and a portion of the sliding member 60 is embedded in the guide rail 23 and can slide along an extending direction of the guide rail 23; the magnetic rotor 40 further includes an abutment 45, where the abutment 45 is connected to the limiting plate 43, and when the magnetic rotor 40 drives the valve needle 30 to rotate relative to the nut 20, the abutment 45 abuts against the driving slider 60.
It will be appreciated that the slider 60 may be brought into abutment by the abutment 45 during rotation of the magnetic rotor, and that the upper and lower limit positions of the slider 60 may be limited during lifting along the setting rail 23 due to the limited upper and lower limits of the travel of the rail 23. At this time, the control of the lifting stroke of the needle 30 driven by the magnetic rotor 40 is correspondingly realized. The abutting piece 45 may include a connecting plate 451 and an abutting plate 453, where the connecting plate 451 is sleeved on the fixed section 39 of the valve needle 30 and connected to the lower surface of the limiting plate 43; the connection plate 451 is connected to the stopper plate 43, and extends in the direction of the valve needle 30 toward the valve port 11. When the abutting piece 45 is installed, the abutting piece can be directly sleeved on the valve needle 30, and then the valve needle is further limited and fixed, so that the convenience of installation and the stability of installation and abutting of the abutting piece are improved.
Referring to fig. 1 and fig. 4 in combination, in an embodiment of the invention, the electronic expansion valve 100 further includes a spring 50, wherein the spring 50 is sleeved on the nut 20 and forms a guide rail 23 with the nut 20; the sliding member 60 includes a ring body 51 and an extension rod 53, the ring body 51 is spirally disposed and located in the guide rail 23, and the extension rod 53 is connected to the ring body 51 and can be abutted and driven by the abutment member 45.
It will be appreciated that the spring 50 and nut 20 cooperate to form the rail 23 such that the rail 23 need not be formed directly on the outer peripheral surface of the nut 20, thereby simplifying the complexity of forming the rail 23. The spring 50 and the nut 20 may be fastened and fixed, that is, the nut 20 may be provided with a fastening slot 25 into which one end of the spring 50 is inserted. Of course, the spring 50 may be directly welded to the nut 20. In other embodiments, the guide rail 23 may be formed by directly forming a spiral groove in the nut 20.
Referring to fig. 1, in an embodiment of the present invention, the electronic expansion valve 100 further includes a housing 70, wherein the housing 70 is a cylindrical structure with an opening at one end, and the housing 70 is connected to the valve seat 10 and covers the nut 20, the valve needle 30 and the magnetic rotor 40.
It will be appreciated that the nut 20, the valve needle 30 and the magnetic rotor 40 may be covered by the outer cover 70, i.e. the nut 20, the valve needle 30 and the magnetic rotor 40 may be protected from damage, thereby advantageously prolonging the service life of the nut 20, the valve needle 30 and the magnetic rotor 40. The outer cover 70 and the valve seat 10 may be fixed by welding to improve the connection stability of the two. Of course, the present application is not limited thereto, and in other embodiments, the cover 70 and the valve seat 10 may be connected by screws or snap-fit.
Referring to fig. 1, in an embodiment of the application, the electronic expansion valve 100 further includes a refrigerant inlet pipe 80 and a refrigerant outlet pipe 90, the refrigerant inlet pipe 80 is connected to the refrigerant cavity 101, and the refrigerant outlet pipe 90 is connected to the valve port 11.
It will be appreciated that the refrigerant inlet pipe 80 and the refrigerant outlet pipe 90 are provided, so that a connection position for connecting with an external pipe body is provided on the electronic expansion valve 100, thereby being beneficial to improving the convenience of installing the electronic expansion valve 100 on a pipeline. The refrigerant inlet pipe 80 and the refrigerant outlet pipe 90 may be welded to the valve seat 10, so as to improve the sealing performance and the connection stability at the connection position. Of course, the present application is not limited thereto, and in other embodiments, the refrigerant inlet pipe 80 and the refrigerant outlet pipe 90 may be connected to the valve seat 10 by a snap-fit connection, a screw connection, or the like.
Referring to fig. 5, the assembly process of the electronic expansion valve of the present invention is as follows: the spring 50 is sleeved on the nut 20 and is limited and fixed on the nut 20 so as to form a guide rail 23 through the surrounding of the spring 50 and the nut 20; the sliding piece 60 is sleeved on the nut 20 and is embedded into the guide rail 23; after that, the nut 20 is fixedly connected to the valve seat 10;
then, one end of the valve needle 30 is inserted into the valve seat 10 through the mounting hole 21, and the valve needle 30 is rotated in a first direction to adjust the valve needle 30 such that the tapered section 373 of the valve needle 30 is inserted into the valve port 11; then rotating the valve needle 30 in a second direction opposite to the first direction by a preset angle to form a gap between the tapered section 373 of the valve needle 30 and the valve port 11; then sleeving the magnetic rotor 40 on the valve needle 30; then, the valve needle 30 is kept motionless, the magnetic rotor 40 is rotated, and the abutting piece 45 of the magnetic rotor 40 abuts to drive the sliding piece 60 to slide to the end position of the guide rail 23, which is close to one end of the valve port 11; then welding and fixing the magnetic rotor 40 and the valve seat 10; the housing 70 is then closed over the nut 20, the valve needle 30 and the magnetic rotor 40 and the housing 70 is fixedly attached to the valve seat 10. The spring 50 and the nut 20 may be fixed by providing a locking groove 25 on the outer circumferential surface of the nut 20, and inserting one end of the spring 50 into the locking groove 25 to fix the two. The sliding member 60 may include a ring body 51 and an extension rod 53, where the ring body 51 is spirally disposed and slidably embedded in the guide rail 23, and one end of the extension rod 53 is connected to the ring body 51, and the other end is extended outside. And the nut 20 and the valve seat 10 may be fixed by welding to improve the sealing and stability of the connection therebetween. Of course, screw connection, snap connection, or the like may be used. After passing one end of the valve needle 30 through the mounting hole 21, the valve needle 30 may be rotated in a first direction so that the valve needle 30 may be lowered into the insertion port 11. At this time, the first direction may be one of clockwise and counterclockwise. The valve needle 30 may then be rotated in a second direction to accurately adjust the valve needle 30 to a gap formed between the tapered section 373 of the valve needle 30 and the valve port 11. At this time, the second direction is opposite to the first direction, i.e., the other of clockwise and counterclockwise. After the magnetic rotor 40 is sleeved on the valve needle 30, the magnetic rotor 40 may be rotated in a first direction, so that the abutting piece 45 of the magnetic rotor 40 abuts against and drives the sliding piece 60 to slide to an end position of the guide rail 23 near one end of the valve port 11, that is, a lower limit position of the sliding piece 60 sliding on the guide rail 23. After the electronic expansion valve 100 is assembled by the above-mentioned method for manufacturing the electronic expansion valve 100, the schematic diagram of the assembly structure of the electronic expansion valve 100 may refer to fig. 1.
The present application also proposes a refrigeration device comprising an electronic expansion valve 100, the electronic expansion valve 100 comprising a valve seat 10, a nut 20, a valve needle 30 and a magnetic rotor 40. The nut 20 is fixedly connected to the valve seat 10 and surrounds the valve seat 10 to form a refrigerant cavity 101, the nut 20 is provided with a mounting hole 21 communicated with the refrigerant cavity 101, at least part of the mounting hole 21 is a threaded hole section, and the valve seat 10 is provided with a valve port 11 communicated with the refrigerant cavity 101; the outer peripheral surface of the valve needle 30 is provided with a thread section, and the valve needle 30 extends into the refrigerant cavity 101 from the mounting hole 21 and is in threaded connection with the mounting hole 21; the magnetic rotor 40 is sleeved on the valve needle 30 outside the refrigerant cavity 101 and can drive the valve needle 30 to rotate relative to the nut 20, so that the valve needle 30 can lift in the mounting hole 21 and be inserted into the valve port 11 or separated from the valve port 11.
In one embodiment of the present application, the valve seat 10 may be used to mount and carry the components of the nut 20, the valve needle 30, the magnetic rotor 40, etc., so that the components of the electronic expansion valve 100 may be assembled to form a single unit. The valve seat 10 may have a cylindrical structure having openings at both ends, one of which may be formed as the valve port 11 and the other of which is covered by the nut 20. The valve seat 10 may have a circular shape, so that the valve seat is regular in shape and easy to manufacture. Of course, the present application is not limited thereto, and in other embodiments, the valve seat 10 may have a square structure or other shape structure. The nut 20 can be used for enclosing with the valve seat 10 to form a refrigerant cavity 101, and meanwhile, the mounting hole 21 on the nut 20 can be arranged coaxially with the valve port 11 on the valve seat 10, so that the valve needle 30 can be accurately inserted into the valve port 11 subsequently. The nut 20 may be disposed entirely outside the valve seat 10, or may be partially inserted into an opening formed in the valve seat 10 at an end thereof remote from the valve port 11. This increases the contact area between the nut 20 and the valve seat 10, which is advantageous in improving the stability of the connection between the two and the seal. Further, the nut 20 may be further sleeved with a connecting piece 22, and the connecting piece 22 may cover the connection between the nut 20 and the valve seat 10, so as to further improve the tightness of the connection between the nut 20 and the valve seat 10. The connecting piece 22 and the nut 20 can be embedded into the outer peripheral surface of the nut 20 to realize the clamping and fixing of the two, and can be fixed with the nut 20 by welding to ensure better connection stability of the two. In addition, the shape of the nut 20 may be a circular structure, so that the shape is regular and is convenient for processing and forming, and meanwhile, the volume of the nut is relatively small, which is beneficial to reducing the occupation of space. The mounting hole 21 of the nut 20 may be partially formed as a screw hole section, and in this case, the upper end, the middle portion or the lower end of the mounting hole 21 may be formed as a screw hole section. Of course, the upper, middle or lower ends of the mounting holes 21 may be formed as screw hole segments. One end of the valve needle 30 may be inserted into the mounting hole 21 and be screwed with the mounting hole 21. The valve needle 30 extending into the refrigerant cavity 101 from the mounting hole 21 can be inserted into the valve port 11 to completely close the valve port 11 (i.e. the valve needle 30 is tightly attached to the valve port 11 so that the refrigerant cannot pass through) or partially close (i.e. a gap is formed between the valve needle 30 and the valve port 11 so that the refrigerant can pass through in small amount); and may be disengaged from the valve port 11 to fully open the valve port 11. The magnetic rotor 40 may be used to provide power so that the valve needle 30 may rotate relative to the nut 20. Specifically, a coil member may be provided on the outer side of the magnetic rotor 40, and the magnetic rotor 40 may sense the electromagnetic force rotation motion of the coil member. The valve needle 30 and the magnetic rotor 40 have a connection relationship to synchronously rotate, and the lifting movement along the direction approaching or separating from the valve port 11 is realized under the action of the threaded cooperation of the nut 20 section on the valve needle 30 and the mounting hole 21 on the nut 20, so that the insertion and separation of the valve port 11 are realized. The magnetic rotor 40 may have a cylindrical structure with an opening at one end, so that the shape of the magnetic rotor is adapted to the rotation track, and the possibility of interference during the movement process may be reduced.
When the electronic expansion valve 100 of the present invention is in use, the magnetic rotor 40 can sense the electromagnetic force of the coil component to rotate and drive the valve needle 30 to rotate relative to the nut 20. Because the valve needle 30 is in threaded engagement with the nut 20, the valve needle 30 is more capable of sliding axially during rotation, i.e., lifting and lowering along the valve port 11 in the mounting hole 21 near or far from the valve seat 10. Such that the needle 30 can be inserted into the valve port 11 or removed from the valve port 11, thereby achieving control of closing and opening of the electronic expansion valve 100.
In addition, in the scheme, the valve needle 30 of the electronic expansion valve 100 is provided with a thread section, so that the electronic expansion valve can be directly in threaded fit with the nut 20. Compared with the prior art in which the electronic expansion valve 100 is in threaded engagement with the nut 20 through the additionally provided screw rod, the valve needle 30 is driven to close and open the valve port 11, so that the electronic expansion valve 100 has relatively more parts and relatively more complex structure. The electronic expansion valve 100 in the scheme does not need to additionally provide a screw rod to drive the valve needle 30, so that the number of parts of the electronic expansion valve 100 can be reduced to enable the structure to be relatively simple, and the manufacturing cost of the electronic expansion valve 100 can be reduced.
Referring to fig. 1 and 3 in combination, in an embodiment of the present application, in a direction of the valve needle 30 approaching the valve port 11, the valve needle 30 sequentially includes a first segment 31, a second segment 33, and a third segment 35, the magnetic rotor 40 is sleeved on the first segment 31, an outer circumferential surface of the second segment 33 is a threaded segment, and the third segment 35 can be inserted into the valve port 11; the mounting hole 21 sequentially comprises a first hole section 211, a second hole section 213 and a third hole section 215, the second hole section 213 is a threaded hole section, the first section 31 is matched with the first hole section 211, the second section 33 is matched with the second hole section 213, and the third section 35 is matched with the third hole section 215.
It can be appreciated that the outer circumferential surface of the second section of the valve needle 30 is a threaded section, so that the length of the threaded section is not too long, and the two sections are convenient for rapidly completing the screwing process, thereby being beneficial to improving the convenience of installation of the valve needle 30. Meanwhile, since the second segment 33 is located at the middle of the valve needle 30, the valve needle 30 and the mounting hole 21 can be connected at the middle position. This is advantageous in that the locking force between the needle 30 and the mounting hole 21 is distributed more uniformly over the needle 30, thereby improving the stability of the installation of the needle 30 as a whole on the nut 20. Of course, the present application is not limited to this, and in other embodiments, the outer circumferential surface of the first segment 31 may be a threaded segment, and the first mounting hole 21 may be a threaded segment. Alternatively, the outer circumferential surfaces of the first segment 31 and the second segment 33 are screw thread segments, and the first mounting hole 21 and the second mounting hole 21 are screw thread segments.
Referring to fig. 3, in an embodiment of the present application, a diameter d1 of the first segment 31, a diameter d2 of the second segment 33, and a diameter d3 of the third segment 35 are defined, so as to satisfy the following relationships: d1 > d2 > d3.
It will be appreciated that since the diameters of the first segment 31, the second segment 33 and the third segment 35 are sequentially reduced (in this case, the diameters of the first hole segment 211, the second hole segment 213 and the third hole segment 215 are also sequentially reduced), the valve needle 30 can extend one end of the third segment 35 into the refrigerant chamber 101 from top to bottom through the mounting hole 21, so as to achieve relatively quick installation. Moreover, the valve needle 30 can be penetrated into the nut 20 after the nut 20 and the valve seat 10 are installed, so that the influence on the installation of the subsequent nut 20 and the valve seat 10 caused by the fact that the valve needle 30 is penetrated into the nut 20 is avoided. Of course, the present application is not limited thereto, and in other embodiments, the diameter d1 of the first segment 31, the diameter d2 of the second segment 33, and the diameter d3 of the third segment 35 may be the same. Alternatively, d1 < d2 < d3.
Referring to fig. 1, 2 and 3 in combination, in an embodiment of the present application, the valve needle 30 further includes an insertion section 37, the insertion section 37 is connected to an end of the third section 35 away from the second section 33, and the diameter of the insertion section 37 is smaller than that of the third section 35 and can be inserted into the valve port 11.
It will be appreciated that, due to the relatively small size of the valve port 11 typically provided, the valve needle 30 now includes an insertion section 37 and is inserted into the valve port 11 through the insertion section 37. Thus, the diameters of the first segment 31, the second segment 33 and the third segment 35 of the valve needle 30 can be relatively larger (i.e. larger than the valve port 11), so as to increase the overall strength of the valve needle 30, thereby being beneficial to prolonging the service life of the valve needle 30. Further, when the second segment 33 of the needle 30 is provided relatively large, it is convenient to form a thread segment on the needle 30, thereby improving convenience in manufacturing and processing thereof. Of course, it should be noted that the present application is not limited thereto, and in other embodiments, when the valve needle 30 does not include the insertion section 37, the diameter of the second section 33 may be set to be relatively small.
Referring to fig. 2, in an embodiment of the application, when the insertion section 37 is inserted into the valve port 11, a gap is formed between the insertion section 37 and the valve port 11.
In some systems, especially in a household one-to-one air conditioning system, if the electronic expansion valve 100 fails in the fully closed state, the refrigeration circuit is easily partially evacuated, and thus the compressor is damaged or even the entire refrigeration system is damaged. Therefore, when the insertion section 37 is inserted into the valve port 11, the gap is provided between the insertion section 37 and the valve port 11, so that the refrigerant in the refrigerant chamber 101 can still pass through a certain amount through the gap between the insertion section 37 and the valve port 11 when the electronic expansion valve 100 is in the closed state, and the problem of vacuum in the refrigerating system caused by continuous operation of the compressor when the electronic expansion valve 100 is in the closed state is solved. Here, the insertion section 37 may have a gap between the valve port 11 and each part in the circumferential direction, or the insertion section 37 may have a gap between the valve port 11 and a part of the insertion section 37. In other embodiments, the insertion section 37 may completely seal the valve port 11 after the valve port 11 is inserted.
Referring to fig. 2, in an embodiment of the present invention, the insertion section 37 includes a constant diameter section 371 and a tapered section 373, the constant diameter section 371 is connected to one end of the third section 35 far away from the second section 33, the constant diameter section 371 can be inserted into the valve port 11, and a gap is provided between the constant diameter section 371 and the valve port 11; the tapered section 373 is connected to an end of the constant diameter section 371 away from the third section body 35, and in a direction in which the valve needle 30 approaches the valve port 11, an area of a cross section of the tapered section 373 is reduced, and a gap is provided between the tapered section 373 and the valve port 11.
It will be appreciated that the provision of the constant diameter segment 371 maintains a gap between the insert segment 37 and the valve port 11 after being inserted into the valve port 11, thereby realizing that a portion of the refrigerant still passes through the valve port 11 when the electronic expansion valve 100 is in the closed state. The tapered section 373 is arranged, so that the size of a gap between the valve needle 30 and the valve port 11 can be changed through the tapered section 373 in the lifting process of the valve needle 30 driven by the magnetic rotor 40, and the flow of the valve port 11 is adjusted. Further, the insert section 37 further includes a transition section 375, and opposite ends of the transition section 375 are connected to the third section 35 and the constant diameter section 371, respectively. At this time, since the diameters of the constant diameter section 371 and the tapered section 373 are relatively small, the valve needle 30 can be made to have a more uniform diameter by connecting the transition section 375 to the third section body 35, which is advantageous for ensuring uniformity of strength everywhere. The transition section 375 may have a cylindrical portion and a conical portion in this order in the direction of the valve needle 30 approaching the valve port 11, the cross section of the conical portion being arranged to decrease in the direction of the valve needle 30 approaching the valve port 11. Therefore, the transition part has certain diameter, ensures the strength and has better transitional connection effect. At this time, the end of the mounting hole 21, which is close to the refrigerant cavity 101, may be in a flared shape, so as to better correspond to the conical portion of the transition section 375, and at the same time, play a role in guiding the refrigerant in the refrigerant cavity 101. Similarly, the end of the mounting hole 21 away from the refrigerant chamber 101 may be formed in a flared shape, so that the refrigerant can flow out faster after passing through the gap between the tapered section 373 of the insertion section 37 and the valve port 11. Of course, the transition 375 may also be a cylindrical or conical portion only in the direction of the valve needle 30 approaching the valve port 11. Still further, the insert segment 37 may also include a needle segment 377, the needle segment 377 being connected to an end of the taper distal from the constant diameter segment 371 to avoid the valve needle 30 forming a sharp edge at the end that is susceptible to damage. In addition, in other embodiments, the insertion section 37 may include only the constant diameter section 371 or the tapered section 373.
Referring to fig. 1, in an embodiment of the present invention, the valve needle 30 further includes a fixed segment 39, the fixed segment 39 is connected to an end of the first segment 31 away from the second segment 33, and a diameter of the fixed segment 39 is smaller than a diameter of the first segment 31; the magnetic rotor 40 is sleeved on the fixed section 39 and is abutted against the surface of the first section 31 far away from the second section 33.
It will be appreciated that, since the diameter of the fixed segment 39 is smaller than the diameter of the first segment 31, the surface of the first segment 31 remote from the second segment 33 may form a limiting step. So on locating fixed section body 39 with magnetic rotor 40 cover, can play spacing support effect to magnetic rotor 40 through spacing step to be convenient for with the accurate installation of magnetic rotor 40 in predetermineeing the mounted position, also can improve the stability of magnetic rotor 40 installation simultaneously. Of course, when the valve needle 30 does not include the fixed segment 39, the magnetic rotor 40 may be directly sleeved on the first segment 31. In one embodiment, the valve needle 30 may include a fixed segment 39, a first segment 31, a second segment 33, a third segment 35 and an insertion segment 37, where the fixed segment 39, the first segment 31, the second segment 33, the third segment 35 and the insertion segment 37 may be integrally formed to ensure the overall strength of the valve needle 30 and simplify the processing process thereof to improve the production efficiency.
Referring to fig. 1, in an embodiment of the present invention, a magnetic rotor 40 includes a magnetic body 41 and a limiting plate 43, wherein the magnetic body 41 has a cylindrical structure with two ends open; the limiting plate 43 is connected to the inner side wall of the magnetic body 41 and sleeved on the valve needle 30 outside the refrigerant cavity 101, and the magnetic body 41 drives the valve needle 30 to rotate relative to the nut 20 through the limiting plate 43.
It will be appreciated that the magnetic rotor 40 is formed of the magnetic body 41 and the limiting plate 43, so that the two can be manufactured separately and independently, and then assembled to form a whole body of the rotor after each is formed, thereby facilitating the manufacturing and processing thereof. The limiting plate 43 may have a circular structure, and is inserted into the inner circumferential surface of the magnetic body 41 to be fastened. In the case where the valve needle 30 includes only the first segment 31, the second segment 33, and the third segment 35, the limiting plate 43 may be sleeved on the first segment 31. When the valve needle 30 further includes a fixed segment 39, the limiting plate 43 may be sleeved on the fixed segment 39. In addition, in other embodiments, the magnetic rotor 40 includes a magnetic body 41 and a connecting rod, the magnetic body 41 is sleeved on the valve needle 30, and the connecting rod is also possible to connect the valve needle 30 and the magnetic body 41.
Referring to fig. 1, in an embodiment of the present invention, a guide rail 23 is disposed on an outer side wall of the nut 20, the guide rail 23 is spirally extended along a direction of the valve needle 30 approaching the valve port 11, the electronic expansion valve 100 further includes a sliding member 60, and a portion of the sliding member 60 is embedded in the guide rail 23 and can slide along an extending direction of the guide rail 23; the magnetic rotor 40 further includes an abutment 45, where the abutment 45 is connected to the limiting plate 43, and when the magnetic rotor 40 drives the valve needle 30 to rotate relative to the nut 20, the abutment 45 abuts against the driving slider 60.
It will be appreciated that the slider 60 may be brought into abutment by the abutment 45 during rotation of the magnetic rotor, and that the upper and lower limit positions of the slider 60 may be limited during lifting along the setting rail 23 due to the limited upper and lower limits of the travel of the rail 23. At this time, the control of the lifting stroke of the needle 30 driven by the magnetic rotor 40 is correspondingly realized. The abutting piece 45 may include a connecting plate 451 and an abutting plate 453, where the connecting plate 451 is sleeved on the fixed section 39 of the valve needle 30 and connected to the lower surface of the limiting plate 43; the connection plate 451 is connected to the stopper plate 43, and extends in the direction of the valve needle 30 toward the valve port 11. When the abutting piece 45 is installed, the abutting piece can be directly sleeved on the valve needle 30, and then the valve needle is further limited and fixed, so that the convenience of installation and the stability of installation and abutting of the abutting piece are improved.
Referring to fig. 1 and fig. 4 in combination, in an embodiment of the invention, the electronic expansion valve 100 further includes a spring 50, wherein the spring 50 is sleeved on the nut 20 and forms a guide rail 23 with the nut 20; the sliding member 60 includes a ring body 51 and an extension rod 53, the ring body 51 is spirally disposed and located in the guide rail 23, and the extension rod 53 is connected to the ring body 51 and can be abutted and driven by the abutment member 45.
It will be appreciated that the spring 50 and nut 20 cooperate to form the rail 23 such that the rail 23 need not be formed directly on the outer peripheral surface of the nut 20, thereby simplifying the complexity of forming the rail 23. The spring 50 and the nut 20 may be fastened and fixed, that is, the nut 20 may be provided with a fastening slot 25 into which one end of the spring 50 is inserted. Of course, the spring 50 may be directly welded to the nut 20. In other embodiments, the guide rail 23 may be formed by directly forming a spiral groove in the nut 20.
Referring to fig. 1, in an embodiment of the present invention, the electronic expansion valve 100 further includes a housing 70, wherein the housing 70 is a cylindrical structure with an opening at one end, and the housing 70 is connected to the valve seat 10 and covers the nut 20, the valve needle 30 and the magnetic rotor 40.
It will be appreciated that the nut 20, the valve needle 30 and the magnetic rotor 40 may be covered by the outer cover 70, i.e. the nut 20, the valve needle 30 and the magnetic rotor 40 may be protected from damage, thereby advantageously prolonging the service life of the nut 20, the valve needle 30 and the magnetic rotor 40. The outer cover 70 and the valve seat 10 may be fixed by welding to improve the connection stability of the two. Of course, the present application is not limited thereto, and in other embodiments, the cover 70 and the valve seat 10 may be connected by screws or snap-fit.
Referring to fig. 1, in an embodiment of the application, the electronic expansion valve 100 further includes a refrigerant inlet pipe 80 and a refrigerant outlet pipe 90, the refrigerant inlet pipe 80 is connected to the refrigerant cavity 101, and the refrigerant outlet pipe 90 is connected to the valve port 11.
It will be appreciated that the refrigerant inlet pipe 80 and the refrigerant outlet pipe 90 are provided, so that a connection position for connecting with an external pipe body is provided on the electronic expansion valve 100, thereby being beneficial to improving the convenience of installing the electronic expansion valve 100 on a pipeline. The refrigerant inlet pipe 80 and the refrigerant outlet pipe 90 may be welded to the valve seat 10, so as to improve the sealing performance and the connection stability at the connection position. Of course, the present application is not limited thereto, and in other embodiments, the refrigerant inlet pipe 80 and the refrigerant outlet pipe 90 may be connected to the valve seat 10 by a snap-fit connection, a screw connection, or the like.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (13)

1. An electronic expansion valve (100), characterized by comprising:
a valve seat (10);
the nut (20), the nut (20) is fixedly connected to the valve seat (10) and encloses with the valve seat (10) to form a refrigerant cavity (101), a guide part (20 a) is arranged on the lower surface of the nut (20), the nut (20) is provided with a mounting hole (21) communicated with the refrigerant cavity (101), the mounting hole (21) penetrates through the guide part (20 a), at least part of the mounting hole (21) is a threaded hole section, and the valve seat (10) is provided with a valve port (11) communicated with the refrigerant cavity (101);
the valve needle (30) is of an integrated structure, a threaded section is arranged on the outer peripheral surface of the valve needle (30), and the valve needle (30) extends into the refrigerant cavity (101) from the mounting hole (21) and is in threaded connection with the mounting hole (21); and
the magnetic rotor (40) is sleeved on the valve needle (30) outside the refrigerant cavity (101) and can drive the valve needle (30) to rotate relative to the nut (20), so that the valve needle (30) can lift in the mounting hole (21) and is inserted into the valve port (11) or separated from the valve port (11).
2. The electronic expansion valve (100) of claim 1, further comprising a refrigerant inlet tube (80), the refrigerant inlet tube (80) being in communication with the refrigerant chamber (101), and an outlet of the refrigerant inlet tube (80) being directed towards the valve needle (30) in the refrigerant chamber (101).
3. The electronic expansion valve (100) according to claim 1, wherein the valve needle (30) sequentially comprises a first segment body (31), a second segment body (33) and a third segment body (35) in a direction that the valve needle (30) approaches the valve port (11), the valve needle (30) further comprises a fixed segment body (39), the fixed segment body (39) is connected to one end of the first segment body (31) far away from the second segment body (33), the magnetic rotor (40) is sleeved on the fixed segment body (39), the outer circumferential surface of the second segment body (33) is a threaded segment, and the third segment body (35) can be inserted into the refrigerant cavity (101);
the mounting hole (21) sequentially comprises a first hole section (211), a second hole section (213) and a third hole section (215), the second hole section (213) is a threaded hole section, the first section body (31) is matched with the first hole section (211), the second section body (33) is matched with the second hole section (213), and the third section body (35) is matched with the third hole section (215) so that the valve needle (30) can move along the axial direction of the threaded hole section.
4. An electronic expansion valve (100) according to claim 3, characterized in that the diameter of the first segment (31) is defined as d1, the diameter of the second segment (33) is defined as d2, and the diameter of the third segment (35) is defined as d3, satisfying the relation: d1 > d2 > d3.
5. The electronic expansion valve (100) of claim 3, wherein the valve needle (30) further comprises an insertion segment (37), the insertion segment (37) being connected to an end of the third segment (35) remote from the second segment (33), the insertion segment (37) having a diameter smaller than a diameter of the third segment (35) and being insertable into the valve port (11).
6. The electronic expansion valve (100) of claim 5, wherein a gap is provided between the insert segment (37) and the valve port (11) when the insert segment (37) is inserted into the valve port (11).
7. The electronic expansion valve (100) of claim 6, wherein the insert segment (37) comprises:
the constant diameter section (371) is connected to one end, far away from the second section body (33), of the third section body (35), the constant diameter section (371) can be inserted into the valve port (11), and a gap is reserved between the constant diameter section (371) and the valve port (11); and
The conical section (373), conical section (373) is connected in isodiametric section (371) keep away from the one end of third section body (35) in valve needle (30) are close to in the direction of valve port (11), the area of the cross section of conical section (373) is the reduction setting, conical section (373) with have the clearance between valve port (11).
8. An electronic expansion valve (100) according to claim 3, wherein the diameter of the fixed segment (39) is smaller than the diameter of the first segment (31);
the magnetic rotor (40) is abutted against the surface of the first section body (31) far away from the second section body (33).
9. The electronic expansion valve (100) of any of claims 1 to 8, wherein the magnetic rotor (40) comprises:
a magnetic body (41), wherein the magnetic body (41) is of a cylindrical structure with openings at two ends; and
the limiting plate (43), limiting plate (43) connect in the inside wall of magnetic body (41) to the cover is located outside refrigerant chamber (101) needle (30), magnetic body (41) pass through limiting plate (43) drive needle (30) for nut (20) rotation.
10. The electronic expansion valve (100) according to claim 9, wherein a guide rail (23) is provided on an outer side wall of the nut (20), the guide rail (23) is spirally extended in a direction in which the valve needle (30) approaches the valve port (11), the electronic expansion valve (100) further comprises a slider (60), and a portion of the slider (60) is embedded in the guide rail (23) and is slidable along an extending direction of the guide rail (23);
The magnetic rotor (40) further comprises an abutting piece (45), the abutting piece (45) is connected to the limiting plate (43), and when the magnetic rotor (40) drives the valve needle (30) to rotate relative to the nut (20), the abutting piece (45) abuts to drive the sliding piece (60).
11. The electronic expansion valve (100) of claim 10, wherein the electronic expansion valve (100) further comprises a spring (50), the spring (50) is sleeved on the nut (20) and forms a guide rail (23) with the nut (20);
the sliding part (60) comprises a ring body (51) and an extension rod (53), wherein the ring body (51) is spirally arranged and positioned in the guide rail (23), and the extension rod (53) is connected with the ring body (51) and can be driven by the abutting part (45) in an abutting mode.
12. The electronic expansion valve (100) according to any of the claims 1 to 8, wherein the electronic expansion valve (100) further comprises a housing (70), the housing (70) being of a cylindrical structure with one end open, the housing (70) being connected to the valve seat (10) and covering the nut (20), the valve needle (30) and the magnetic rotor (40);
and/or, the electronic expansion valve (100) further comprises a refrigerant inlet pipe (80) and a refrigerant outlet pipe (90), the refrigerant inlet pipe (80) is communicated with the refrigerant cavity (101), and the refrigerant outlet pipe (90) is communicated with the valve port (11).
13. A refrigeration device comprising an electronic expansion valve (100) according to any one of claims 1 to 11.
CN202310648454.9A 2021-06-30 2021-06-30 Electronic expansion valve and refrigeration equipment Pending CN116625032A (en)

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CN202110743286.2A CN113294528A (en) 2021-06-30 2021-06-30 Electronic expansion valve and refrigeration equipment

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CN214197319U (en) * 2020-12-14 2021-09-14 广东威灵电机制造有限公司 Nut, electronic expansion valve and stop structure and refrigeration equipment thereof
CN216242311U (en) * 2021-11-19 2022-04-08 浙江盾安禾田金属有限公司 Electronic expansion valve
WO2023165331A1 (en) * 2022-03-04 2023-09-07 浙江盾安人工环境股份有限公司 Nut assembly and electronic expansion valve

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JP2001271956A (en) * 2000-03-24 2001-10-05 Saginomiya Seisakusho Inc Motor-driven flow rate control valve
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CN112879573A (en) * 2019-11-29 2021-06-01 浙江三花智能控制股份有限公司 Electronic expansion valve
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