CN114607781B - Electronic expansion valve and refrigeration equipment - Google Patents
Electronic expansion valve and refrigeration equipment Download PDFInfo
- Publication number
- CN114607781B CN114607781B CN202210092702.1A CN202210092702A CN114607781B CN 114607781 B CN114607781 B CN 114607781B CN 202210092702 A CN202210092702 A CN 202210092702A CN 114607781 B CN114607781 B CN 114607781B
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- valve
- guide
- bearing
- electronic expansion
- needle body
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 230000000670 limiting effect Effects 0.000 claims description 27
- 239000003507 refrigerant Substances 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000036961 partial effect Effects 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—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
-
- 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
- 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
- F16K1/48—Attaching valve members to screw-spindles
- F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
-
- 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
- F16K1/50—Preventing rotation of 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
- 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
- F25B41/345—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by solenoids
-
- 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
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/06—Details of flow restrictors or 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)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Lift Valve (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses an electronic expansion valve and a refrigeration device, wherein the electronic expansion valve comprises: the valve comprises a valve housing, a nut, a guide lantern ring and a valve needle, wherein the valve housing is provided with a valve cavity and a valve port communicated with the valve cavity; the nut and the guide lantern ring are both arranged in the valve cavity, and the guide lantern ring is positioned at one side of the nut close to the valve port; the valve needle comprises a needle body and a connecting part which are connected, the needle body is inserted into the valve port after penetrating through the guide lantern ring, clearance fit is formed between the needle body and the guide lantern ring and between the needle body and the valve port, and the connecting part is provided with a part positioned in the inner cavity of the nut and is arranged in clearance with the inner wall surface of the nut; the fit clearance between the connecting part and the nut is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port, and the fit clearance between the needle body and the guide lantern ring is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port. The technical scheme of the invention aims to solve the technical problem that an electronic expansion valve is easy to be blocked.
Description
Technical Field
The invention relates to the field of electronic expansion valves, in particular to an electronic expansion valve and refrigeration equipment.
Background
In the refrigeration cycle, an electronic expansion valve is typically provided between the outdoor heat exchanger and the indoor heat exchanger. When in a refrigeration mode, the electronic expansion valve throttles and reduces the pressure of the refrigerant from the outdoor heat exchanger and then guides the refrigerant to the indoor heat exchanger; when in the heating mode, the electronic expansion valve throttles and reduces the pressure of the refrigerant from the indoor heat exchanger and then guides the refrigerant to the outdoor heat exchanger. However, in the use process of the electronic expansion valve, tiny foreign matters inevitably enter the system, and if the foreign matters are clamped between the valve port and the valve needle, the valve needle can deflect, so that the valve needle is blocked.
The foregoing is merely provided to facilitate an understanding of the principles of the invention and is not admitted to be prior art.
Disclosure of Invention
The invention mainly aims to provide an electronic expansion valve, which aims to solve the technical problem that the electronic expansion valve is easy to be blocked.
In order to achieve the above object, the present invention provides an electronic expansion valve, comprising:
the valve housing is provided with a valve cavity and a valve port communicated with the valve cavity;
the nut is arranged in the valve cavity;
the guide lantern ring is arranged in the valve cavity and is positioned at one side of the nut close to the valve port; and
the valve needle comprises a needle body and a connecting part which are connected, the needle body is inserted into the valve port after penetrating through the guide lantern ring, clearance fit is achieved between the needle body and the guide lantern ring and between the needle body and the valve port, and the connecting part is provided with a part positioned in an inner cavity of the nut and is arranged in clearance with the inner wall surface of the nut;
the fit clearance between the connecting part and the nut is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port, and the fit clearance between the needle body and the guide collar is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port.
Optionally, a fit clearance between the connection portion and the nut is greater than a fit clearance between the needle body and the guide collar.
Optionally, the nut is equipped with screw hole and the first guiding hole that is linked together, the screw hole is located the one side of keeping away from of first guiding hole the valve port, connecting portion clearance fit in first guiding hole, electronic expansion valve still includes the valve rod, the one end drive of valve rod connect in connecting portion, the other end of valve rod with screw hole threaded connection and clearance fit, just the valve rod with the cooperation clearance between the screw hole is greater than connecting portion with the cooperation clearance between the first guiding hole.
Optionally, a first abdication hole and a second guide hole which are distributed along the axial direction and communicated are formed in the guide sleeve ring, the needle body penetrates through the second guide hole, and one end of the connecting part connected with the needle body protrudes out of the inner cavity of the nut and is accommodated in the first abdication hole.
Optionally, a second abdicating hole is further formed in the guide sleeve ring, the second abdicating hole is communicated with one end, far away from the second guide hole, of the first abdicating hole, and the nut part is accommodated in the second abdicating hole.
Optionally, the needle body has a first end far away from the connecting portion, the first end is inserted in the valve port, the connecting portion has a second end far away from the needle body, and the electronic expansion valve further includes:
the bearing is fixedly arranged at the second end through the outer ring;
the valve rod is movably inserted into the inner ring of the bearing; and
and one end of the elastic piece is connected with the valve rod, and the other end of the elastic piece is connected with the bearing.
Optionally, the connecting portion is recessed in the second end towards the first end to form a mounting groove, and the bearing is fixedly mounted in the mounting groove through the outer ring.
Optionally, the mounting groove is internally provided with a first limiting part and a second limiting part which are distributed at two ends of the bearing, and the first limiting part and the second limiting part are fixed relative to the mounting groove and respectively abutted to two end faces of an outer ring of the bearing.
Optionally, the mounting groove is provided with a first groove section and a second groove section which are distributed in the axial direction, the inner diameter of the first groove section is larger than that of the second groove section, a limit step is formed at the communication position of the first groove section and the second groove section, and the first limit part is the limit step.
Optionally, the second limiting part is a limiting collar which is abutted to the end face of the outer ring of the bearing, which is far away from the first end, and the valve rod is inserted into the bearing after penetrating through the limiting collar.
Optionally, the electronic expansion valve further comprises a driving collar fixedly sleeved at the tail end of the valve needle, and the driving collar is located at one side, close to the first end, of the bearing.
Optionally, the elastic element is a spring, a flange portion is disposed on a side, away from the first end, of the peripheral wall of the valve rod, the spring is sleeved on the valve rod, one end of the spring abuts against the flange portion, and the other end of the spring abuts against the end face of the bearing.
Optionally, the outer wall of the guide lantern ring is convexly provided with a mounting step, the inner wall of the valve shell is correspondingly provided with a step space, and the mounting step is clamped in the step space.
Optionally, a coolant passing port is formed in the side wall of the valve housing, and the guide sleeve ring is provided with a guide conical surface opposite to the coolant passing port.
The invention also provides refrigeration equipment comprising the electronic expansion valve.
In the electronic expansion valve, when foreign matters are blocked between the valve port and the valve needle, even if the needle body is deflected relative to the valve port, the fit clearance between the needle body and the guide sleeve ring is larger than the minimum fit clearance between the tip and the inner wall surface of the valve port, so that enough movable space is reserved between the needle body and the guide sleeve ring, the needle body is driven to incline relative to the guide sleeve ring, the needle body is not blocked with the guide sleeve ring, but still keeps a certain clearance with the inner wall surface of the guide sleeve ring, the up-and-down movement of the valve needle is not influenced, and because the fit clearance between the connecting part and the nut is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port, the connecting part and the inner wall surface of the nut are also provided with enough movable space, and likewise, after the connecting part is driven by the needle body to incline relative to the nut, the needle body is not blocked with the nut, but still keeps a certain clearance with the inner wall surface of the nut, and the up-and-down movement of the valve needle is not influenced. In general, when the foreign matter is blocked in between the needle body and the valve port of the valve needle, the valve needle still can move smoothly in the up-down direction because the needle body is arranged on the inner side of the guide sleeve ring and the connecting part is arranged on the inner side of the nut, so that the valve needle can be effectively prevented from being blocked, and meanwhile, the influence of the eccentricity caused by the coaxiality deviation of the valve needle and the valve rod in the assembly process on the movement of the valve needle can be avoided.
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 diagram 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 partial enlarged view at B in FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1 at C;
FIG. 5 is a partial enlarged view at D in FIG. 1;
FIG. 6 is an enlarged view of a portion of FIG. 1 at E;
FIG. 7 is a schematic view of a partial structure of an embodiment of an electronic expansion valve according to the present invention;
FIG. 8 is an enlarged view of a portion of F in FIG. 7;
FIG. 9 is an enlarged view of a portion of G in FIG. 7;
fig. 10 is a schematic partial structure of another embodiment of the electronic expansion valve of the present invention.
Reference numerals illustrate:
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, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
The terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. 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.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. 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, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. 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.
The invention provides an electronic expansion valve.
Referring to fig. 1 to 4, the electronic expansion valve includes: a valve housing 100, a nut 200, a guide collar 400 and a valve needle 500, the valve housing 100 being provided with a valve cavity 103 and a valve port 104 communicating with the valve cavity 103; the nut 200 and the guide collar 400 are mounted in the valve chamber 103; the guide collar 400 is located on the side of the nut 200 that is adjacent to the valve port 104; the valve needle 500 includes a needle body 510 and a connecting portion 520 that are connected, the needle body 510 is inserted into the valve port 104 after passing through the guide collar 400, clearance fit is provided between the needle body 510 and the guide collar 400 and between the needle body 510 and the valve port 104, and the connecting portion 520 has a portion located in the inner cavity of the nut 200 and is disposed in clearance with the inner wall surface of the nut 200;
wherein a fit clearance between the connection portion 520 and the nut 200 is larger than a minimum fit clearance between the needle body 510 and an inner wall surface of the valve port 104, and a fit clearance between the needle body 510 and the guide collar 400 is larger than a minimum fit clearance between the needle body 510 and an inner wall surface of the valve port 104.
Specifically, the valve housing 100 includes an outer cover 101, a valve seat 102 fixedly connected with the outer cover 101, the outer cover 101 and the valve seat 102 enclose to form a valve cavity 103, the electronic expansion valve further includes a valve rod 300 and a magnetic rotor 900 disposed in the valve cavity 103, the magnetic rotor 900 can rotate relative to the valve housing 100, the nut 200 is fixedly connected with the valve seat 102, the magnetic rotor 900 drives the valve rod 300 to move so as to drive the valve needle 500 to move relative to the valve port 104, thereby controlling the flow of the electronic expansion valve.
The nut 200 is provided with a mounting hole 210 extending along an axial direction thereof, the mounting hole 210 includes a first guiding hole 212, a portion of the connecting portion 520 located in the inner cavity of the nut 200 is in clearance fit with the first guiding hole 212, and a fit clearance between the connecting portion 520 and the nut 200 is a clearance between an outer wall surface of the connecting portion 520 and an inner wall surface of the first guiding hole 212 (i.e., D3 in fig. 4). The needle body 510 has a main section 511 and a tip 512 distributed along the axial direction, the guide collar 400 is provided with a second guide hole 401, the main section 511 is penetrated through the second guide hole 401 and is in clearance fit with the second guide hole 401, and the fit clearance between the needle body 510 and the guide collar 400 is the clearance between the outer wall surface of the main section 511 and the inner wall surface of the second guide (i.e. D2 in fig. 3). The tip 512 is inserted into the valve port 104 and is in clearance fit with the inner wall surface of the valve port 104, and the minimum fit clearance between the needle body 510 and the inner wall surface of the valve port 104 is the minimum fit clearance between the tip 512 and the inner wall surface of the valve port 104 (i.e., D1 in fig. 2). In addition, due to the existence of the minimum fit clearance, when the valve needle 500 closes the valve port 104, a certain clearance is formed between the outer wall surface of the tip 512 and the inner wall surface of the valve port 104, so that friction between the valve needle 500 and the valve port 104 can be reduced, and the valve needle 500 is prevented from being blocked. In particular, the second guiding hole 401 has a hole depth of 1mm or more to satisfy the maximum axial movement progress of the needle body 510, thereby providing guiding function in the axial movement of the needle body 510.
It will be appreciated that the first guide hole 212 and the second guide hole 401 should be coaxial with the valve port 104, the nut 200 provides a guiding function for the axial movement of the connecting portion 520 through the first guide hole 212, and the guide collar 400 provides a guiding function for the main section 511 of the needle body 510 through the second guide hole 401, so as to ensure that the valve needle 500 can maintain high coaxiality with the valve port 104, reduce friction between the valve needle 500 and the valve port 104, and ensure stability of the axial movement of the valve needle 500. In addition, alternatively, the needle body 510 and the connecting part 520 may be integrally formed, so as to improve the production efficiency of the valve needle 500; or, the needle body 510 and the connecting portion 520 are formed separately and then fixedly connected to simplify the structure of the mold and ensure the yield.
In the electronic expansion valve of the present invention, when foreign matter is trapped between the valve port 104 and the valve needle 500, even if the tip 512 of the needle body 510 is deflected, and since the fit clearance between the main body section 511 of the needle body 510 and the second guide hole 401 is larger than the minimum fit clearance between the tip 512 and the inner wall surface of the valve port 104, there is enough space between the main body section 511 and the inner wall surface of the second guide hole 401, the main body section 511 is driven to tilt relative to the second guide hole 401, and is not jammed with the second guide hole 401, but still keeps a certain clearance with the inner wall surface of the second guide hole 401, and also does not affect the up-down movement of the needle body 510, and since the clearance between the outer wall surface of the connecting portion 520 and the inner wall surface of the nut 200 is larger than the minimum fit clearance between the tip 512 and the inner wall surface of the valve port 104, the connecting portion 520 and the first guide hole 212 of the nut 200 have enough space, and likewise, after the connecting portion is driven to tilt relative to the inner wall surface of the first guide hole 212, the connecting portion 520 is not jammed with the first guide hole 212, but still does not affect the up-down movement of the whole valve needle 500. In summary, when the foreign matter is trapped between the tip 512 of the valve needle 500 and the valve port 104, since the main body section 511 of the valve needle 500 has enough deviation movement space in the inner cavity of the guide collar 400 and the connecting portion 520 in the inner cavity of the nut 200, the valve needle 500 can still move smoothly in the up-down direction, so that the valve needle 500 can be effectively prevented from being blocked, and meanwhile, the influence of the eccentricity caused by the coaxiality deviation of the valve rod 300 and the valve needle 500 on the axial movement of the valve needle 500 can be avoided.
Further, in the present embodiment, the fit clearance between the connection part 520 and the nut 200 is larger than the fit clearance between the needle body 510 and the guide collar 400, that is, the clearance D3 between the outer wall surface of the connection part 520 and the inner wall surface of the first guide hole 212 is larger than the clearance D2 between the outer wall surface of the main body section 511 and the inner wall surface of the second guide hole 401. It will be appreciated that when the valve port 104 is opened, the tip 512 of the needle body 510 is separated from the valve port 104, and at this time, if a foreign object is jammed in the gap between the main body section 511 and the second guiding hole 401, even if the main body section 511 is inclined relative to the second guiding hole 401 and the connecting portion 520 is driven to incline relative to the first guiding hole 212, the connecting portion 520 will not be jammed with the first guiding hole 212, but still keeps a certain gap with the inner wall surface of the first guiding hole 212, so that the overall up-and-down movement of the valve needle 500 will not be affected.
Further, in this embodiment, as shown in fig. 1, the mounting hole 210 further includes a threaded hole 211, the threaded hole 211 is located on a side of the first guide hole 212 away from the valve port 104, one end of the valve rod 300 is drivingly connected to the connecting portion 520, and the other end of the valve rod 300 is threadedly connected to the threaded hole 211, so that the coil drives the magnetic rotor 900 to rotate, the magnetic rotor 900 drives the valve rod 300 to rotate, the valve rod 300 can perform circumferential rotation and axial movement synchronously through the threaded engagement with the nut 200, and the valve rod 300 drives the valve needle 500 to move axially upward or axially downward, thereby controlling the flow rate of the electronic expansion valve. The threaded section of the valve rod 300 is in clearance fit with the threaded hole 211, so that the valve rod 300 can have a certain movement deviation in the radial direction relative to the nut 200, and the valve rod 300 and the nut 200 can further absorb the concentricity deviation to improve the overall coaxiality.
In this embodiment, the fit-in gap between the valve rod 300 and the threaded hole 211 is larger than the fit-in gap (i.e., D3) between the connecting portion 520 and the first guide hole 212. It will be appreciated that when the valve stem 300 is coaxially engaged with the valve needle 500 and the connection portion 520 is inclined with respect to the first guide hole 212, since the minimum engagement gap between the valve stem 300 and the nut 200 occurs between the threaded section of the valve stem 300 and the threaded hole 211, which is larger than the engagement gap between the connection portion 520 and the first guide hole 212, there is enough space between the valve stem 300 and the threaded section and the threaded hole 211 to allow the threaded section of the valve stem 300 to be engaged with the threaded hole 211 of the nut 200 without affecting the up-down movement of the valve needle 500 of the electronic expansion valve even if the valve stem 300 is driven to incline with respect to the nut 200.
Referring to fig. 1, 7 and 10, in some embodiments, the needle body 510 has a first end 501 (i.e. the end where the tip 512 is located) far from the connecting portion 520, the first end 501 is inserted into the valve port 104, the connecting portion 520 has a second end 502 far from the needle body 510, the electronic expansion valve further includes a bearing 600 and an elastic member 310, the bearing 600 is fixedly mounted on the second end 502 through an outer ring, and the valve rod 300 is movably inserted into the bearing 600 to coaxially cooperate with the valve needle 500. The elastic member 310 has one end connected to the valve rod 300 and the other end connected to the bearing 600, and in particular, an end of the elastic member 310 is connected to an end surface of an inner ring of the bearing 600, which is far away from the first end 501, so that the valve rod 300 can drive the valve needle 500 to axially move through the elastic member 310. And the valve rod 300 is matched with the bearing 600, when the valve rod 300 circumferentially rotates, even if the inner ring of the bearing 600 is driven to rotate along with the valve rod 300, the outer ring of the bearing 600 fixedly connected with the valve needle 500 can still be kept circumferentially, and the valve needle 500 cannot be driven to circumferentially rotate. In this embodiment, by matching the valve rod 300 with the bearing 600, the circumferential movement transmitted from the valve rod 300 to the valve needle 500 is counteracted, and the valve rod 300 is matched with the bearing 600 through the elastic member 310 to drive the axial movement to the valve needle 500, so that the valve needle 500 only moves axially and does not rotate relative to the valve port 104, which is beneficial to reducing the abrasion between the valve needle 500 and the valve port 104, thereby guaranteeing the working reliability of the electronic expansion valve.
Alternatively, the end of the elastic member 310 is connected to the end surfaces of the valve stem 300 and the inner ring of the bearing 600 by abutting or caulking. The end of the elastic member 310 may directly contact the end surface of the inner ring of the valve stem 300 or the bearing 600, or may indirectly contact the end surface of the inner ring of the valve stem 300 or the bearing 600 through another member. In this embodiment, as shown in fig. 7 and 10, the elastic member 310 is provided as a spring, the peripheral wall of the valve rod 300 is provided with a flange portion 320, the spring is sleeved on the valve rod 300, one end of the spring abuts against the flange portion 320, and the other end abuts against the end face of the bearing 600, so as to achieve connection between the spring and the valve rod 300 and the end face of the inner ring of the bearing 600. Of course, in other embodiments, the elastic member 310 may be configured as a spring plate, an elastic rubber sleeve, or an elastic silica gel sleeve.
Further, as shown in fig. 1, 7 and 10, the connecting portion 520 is recessed toward the first end 501 at the second end 502 to form a mounting groove 530, and the bearing 600 is fixedly mounted in the mounting groove 530 through an outer ring. In this way, the bearing 600 is not exposed, and the matching structure of the bearing 600 and the mounting groove 530 is also accommodated in the mounting groove 530, so that the bearing 600 is not easy to be impacted, and stable connection between the bearing 600 and the mounting groove 530 is ensured. Of course, in other embodiments, the end face of the second end 502 may be a planar structure, and the bearing 600 is fixedly mounted on the end face of the second end 502, and at this time, the inner ring of the bearing 600 may be driven to rotate relative to the connection portion 520 by leaving a gap between the inner ring of the bearing 600 and the end face of the second end 502, so that the valve needle 500 may be prevented from rotating circumferentially.
Further, as shown in fig. 7 and 10, the mounting groove 530 has a relief space 531 located at a side of the bearing 600 away from the second end 502, the valve rod 300 is inserted through the bearing 600, and the end of the valve rod 300 is protruding from the relief space 531. In this manner, the distal end of the stem 300 is able to move toward the relief space 531 to compress the spring and thereby provide a preload force to the valve needle 500. Of course, in other embodiments, it is also possible to provide sufficient preload to the valve needle 500 by extending the axial length of the bearing 600 to provide sufficient space for axial movement of the valve stem 300, ensuring that the spring can be compressed into place.
Further, in this embodiment, a first limiting portion and a second limiting portion are disposed in the mounting groove 530 and distributed at two ends of the bearing 600, and the first limiting portion and the second limiting portion are fixed relative to the mounting groove 530 and respectively abut against two end surfaces of an outer ring of the bearing 600. In this way, the bearing 600 can be fixedly mounted in the mounting groove 530 by limiting both sides of the bearing 600 in the axial direction.
In some embodiments, as shown in fig. 7, the mounting groove 530 has a first groove section and a second groove section distributed in an axial direction, the first groove section has an inner diameter larger than that of the second groove section, and a limiting step 532 is formed at a communication position of the first groove section and the second groove section, and the first limiting portion is the limiting step 532. Further, the second limiting portion is a limiting collar 700 abutting against an end face of an outer ring of the bearing 600, which is far away from the first end 501, and the valve rod 300 is inserted into the bearing 600 after penetrating through the limiting collar 700. Without loss of generality, the stop collar 700 is fixedly connected to the groove wall of the mounting groove 530 by means of welding. It will be appreciated that the stop steps 532 and the stop collar 700 should only abut against the end surface of the outer ring of the bearing 600 to simultaneously limit the axial movement and circumferential rotation of the outer ring of the bearing 600, and the axial movement of the inner ring of the bearing 600 will be limited therewith, but the circumferential rotation of the inner ring of the bearing 600 will not be affected, so as to ensure that the inner ring of the bearing 600 can be driven by the valve rod 300 to perform the function of counteracting the circumferential rotation of the valve rod 300. Moreover, the cooperation of the limiting step 532 and the limiting collar 700 can provide a large clamping force in the axial direction of the bearing 600, so that friction between the outer side surface of the bearing 600 and the groove wall of the mounting groove 530 can be avoided, and the bearing 600 can be stably mounted in the mounting groove 530.
Further, as shown in fig. 9, the stop collar 700 includes a first guide section 710 and a first connection section 720 which are axially distributed and connected, the first connection section 720 is connected with a groove wall of the first groove section, and an outer diameter of the first guide section 710 is gradually reduced from an end connected to the first connection section 720 toward an end far from the first connection section 720. In this way, the collar 700 can be more easily fitted into the mounting groove 530 under the guide of the first guide section 710. Of course, in other embodiments, the end surface of the first groove section away from the second groove section may be provided with a guiding structure, so that the limit collar 700 may be guided to be installed in the installation groove 530, or the bearing 600 may be guided to be installed in the installation groove 530.
Further, as shown in fig. 9, the first guide sections 710 are connected to both ends of the first connecting section 720. That is, both end surfaces of the stopper collar 700 have a guide structure, and when the stopper collar 700 is assembled, it is unnecessary to distinguish directions, and when any one end of the stopper collar 700 is fitted into the mounting groove 530, it can be guided by the first guide section 710. Thus, the production efficiency of the electronic expansion valve can be improved by carrying out fool-proof design on the limit collar 700.
In some embodiments, as shown in fig. 10, the bearing 600 is fixed in the mounting groove 530 by press-riveting. Specifically, the groove wall of the first groove section includes a main body portion 533 and a press-riveting portion 534, the press-riveting portion 534 is connected to the groove wall of the second groove section through the main body portion 533, that is, the press-riveting portion 534 is an end of the groove wall of the first groove section, after the bearing 600 is mounted on the limiting step 532, the outer ring of the bearing 600 abuts against the groove wall surface of the first groove section, so that the outer ring of the bearing 600 can be limited in the circumferential direction of the bearing 600, and the mounting stability of the bearing 600 is further improved. Then, the press-riveting portion 534 is bent so that the press-riveting portion 534 abuts against the end face of the outer ring of the bearing 600, and the bearing 600 is press-riveted and fixed to the mounting groove 530. The wall thickness of the press-riveting portion 534 is smaller than that of the main body 533, so that the press-riveting portion 534 can be bent more effort-effectively, and press-riveting of the bearing 600 can be realized more conveniently and rapidly. In this embodiment, the press-riveting portion 534 and the limiting step 532 serve as a first limiting portion and a second limiting portion, respectively, to fix the bearing 600 to the mounting groove 530.
In some embodiments, as shown in fig. 7 and 10, the electronic expansion valve further includes a driving collar 800 fixedly sleeved on the end of the valve needle 500, where the driving collar 800 is located on a side of the bearing 600 near the first end 501 and detachably abuts against an end surface of the bearing 600. Thus, when the valve rod 300 moves upwards axially, since the limit collar 700 abuts against the end face of the bearing 600, the limit collar 700 is driven by the bearing 600 to move upwards axially, the bearing 600 will also move upwards under the pushing force, and the valve needle 500 fixedly connected with the bearing 600 will also move upwards. Of course, in other embodiments, the periphery of the end of the valve rod 300 may be provided with a driving protrusion, so that when the valve rod 300 moves axially upward, the driving protrusion pushes the end face of the bearing 600, and the valve needle 500 can be driven to move upward.
Further, as shown in fig. 8, the end of the valve needle 500 is provided with a positioning step 330, and the driving collar 800 abuts against the positioning step 330. In this way, the positioning step 330 may play a role in positioning during the process of mounting the driving collar 800 on the valve needle 500, when the end surface of the driving collar 800 abuts against the positioning step 330, that is, it represents that the driving collar 800 is mounted in place. Of course, in other embodiments, the positioning step 330 may be disposed inside the driving collar 800, and when the end of the valve rod 300 abuts against the positioning step 330, it represents that the driving collar 800 is in place.
Further, as shown in fig. 8, the driving collar 800 includes a second guiding section 820 and a second connecting section 810 distributed in an axial direction, the valve rod 300 is in interference fit with the second connecting section 810, the second guiding section 820 is located at one side of the second connecting section 810 near the bearing 600, and an inner diameter of the second guiding section 820 gradually increases from one end near the second connecting section 810 toward one end far from the second connecting section 810. In this manner, the second guide section 820 may act as a guide during assembly of the valve stem 300 and the drive collar 800, enabling a more labor-efficient and faster operation of inserting the valve stem 300 into the drive collar 800.
Further, as shown in fig. 8, the driving collar 800 further includes a transition section 830 located at a side of the second connection section 810 near the bearing 600, and the driving collar 800 has two sections of the second guide section 820, and the transition section 830 is connected to an end surface of the driving collar 800 through one of the second guide sections 820 and is connected to the second connection section 810 through the other of the second guide sections 820. That is, between the end of the driving collar 800 near the bearing 600 and the end far from the bearing 600 are a second guide section 820, a transition section 830, a second guide section 820 and a second connection section 810, which are sequentially connected, wherein the transition section 830 is in clearance fit with the valve stem 300. When the driving collar 800 is assembled, the valve rod 300 should be inserted from one end of the driving collar 800 near the bearing 600, therefore, the end portion of the valve rod 300 will contact the position with the largest inner diameter of the second guiding section 820 at the end of the driving collar 800, the end portion of the valve rod 300 can be conveniently aligned and clamped in, the end portion of the valve rod 300 can be inserted into the transition section 830 with relatively saving effort under the guidance of the second guiding section 820, and then the second guiding section 820 reaches another second guiding section 820 through the transition section 830, the second guiding section 820 is used for guiding the valve rod 300 to be inserted into the second connecting section 810, and because the second connecting section 810 is in interference fit with the valve rod 300, the acting force needs to be increased after the end portion of the valve rod 300 enters the second connecting section 810, so that the valve rod 300 continues to be inserted into the driving collar 800 until the driving collar 800 abuts against the positioning step 330. Thus, the assembly of the driving collar 800 and the valve rod 300 can be realized more effort-saving and faster, which is beneficial to improving the production efficiency of the electronic expansion valve.
Referring to fig. 1, 5 and 6, in some embodiments, the guide collar 400 further includes a first relief hole 402 axially distributed and communicated with the second guide hole 401, and one end of the connecting portion 520 connected to the needle body 510 protrudes from the inner cavity of the nut 200 and is accommodated in the first relief hole 402. Further, a second abdication hole 403 is further provided in the guide collar 400, the second abdication hole 403 is communicated with one end of the first abdication hole 402 away from the second guide hole 401, and the nut 200 is partially accommodated in the second abdication hole 403. It will be appreciated that the second guide bore 401 of the guide collar 400 is required for guiding engagement of the valve needle 500, and that the valve needle 500 is positioned adjacent to the valve port 104, which tends to affect the flow of refrigerant adjacent to the valve port 104 if the guide collar 400 is coupled to the valve housing 100 via the outer wall of the second guide bore 401. In this embodiment, the first relief hole 402 of the relief connection portion 520 and the second relief hole 403 of the relief nut 200 are sequentially disposed on the side of the second guide hole 401 away from the valve port 104, so that the guide collar 400 is fixedly connected to the valve housing 100 through the outer wall of the first relief hole 402 or the outer wall of the second relief hole 403, and the connection structure between the guide collar 400 and the valve housing 100 can adversely affect the flow of the refrigerant.
In some embodiments, as shown in fig. 5 and 6, the outer wall of the guide collar 400 is convexly provided with a mounting step 410, and the inner wall of the valve housing 100 is correspondingly provided with a step space 110, and the mounting step 410 is clamped in the step space 110. Specifically, the mounting step 410 is formed on the outer wall opposite to the first relief hole 402 and the second relief hole 403, and the mounting step 410 engages with the step space 110, so that the guide collar 400 is fixedly mounted to the valve housing 100.
Further, as shown in fig. 5, the step space 110 is formed by commonly constructing a first step surface 111 and a second step surface 112 that are connected, the installation step 410 includes a third step surface 411 abutting against the first step surface 111 and a fourth step surface 412 abutting against the second step surface 112, and the first step surface 111 is disposed parallel to the axial direction of the guide collar 400. Wherein at least one of an end of the first step surface 111 remote from the second step surface 112 and an end of the third step surface 411 close to the fourth step surface 412 is provided with a guide structure for guiding the mounting step 410 to be caught in the step space 110 when the guide collar 400 is assembled to the valve housing 100.
Specifically, in the present embodiment, a first guide surface 113 is provided on a side of the first step surface 111 away from the second step surface 112, and the first guide surface 113 is gradually provided away from the third step surface 411 in a direction away from the first step surface 111. Further, two second guiding surfaces 413 are disposed at one end of the third step surface 411, which is close to the fourth step surface 412, the second guiding surfaces 413 are gradually disposed close to the first step surface 111 in a direction away from the fourth step surface 412, a transition surface 414 is disposed between the two second guiding surfaces 413, the transition surface 414 is parallel to the axial direction of the guiding collar 400, and the transition surface 414 is connected to the third step surface 411 through one second guiding surface 413, and is connected to the fourth step surface 412 through the other guiding surface. In order to obtain an optimal guiding effect, the first guiding surface 113 and the second guiding surface 413 may be arranged in parallel, i.e. parallel or approximately parallel.
During the assembly of the guide collar 400 to the valve housing 100, the second guide surface 413 closer to the fourth step surface 412 first enters the space inside the first guide surface 113, and then, as the installation step 410 gradually snaps into the step space 110, the transition surface 414, the other guide surface, and the third step surface 411 sequentially enter the space inside the first guide surface 113, and during this process, at least one of the first guide surface 113 and the second guide surface 413 can play a role in guiding the assembly until the third step surface 411 contacts the first step surface 111. Therefore, the step-type guiding structure can make the assembling process of the guiding collar 400 on the valve housing 100 more labor-saving and faster, and is beneficial to improving the production efficiency of the electronic expansion valve.
In some embodiments, as shown in fig. 6, the side wall of the valve housing 100 is provided with a refrigerant passing opening 105, and the guide collar 400 is provided with a guide cone 420 opposite to the refrigerant passing opening 105. Thus, when the refrigerant flows between the refrigerant passing port 105 and the valve port 104, the flow guiding conical surface 420 can play a role in guiding the refrigerant to flow, so that the disorder of the refrigerant flow is avoided, and the working performance of the electronic expansion valve is influenced.
In some embodiments, as shown in fig. 1, the valve cavity 103 includes a first valve cavity 1031 and a second valve cavity 1032 respectively located at two axial sides of the guide collar 400, and a balance channel for communicating the first valve cavity 1031 and the second valve cavity 1032 is provided on the guide collar 400 or the valve housing 100. Due to the arrangement of the balance channels, the air pressures of the first valve cavity 1031 and the second valve cavity 1032 can be balanced, so that the stability of the internal pressure of the electronic expansion valve is guaranteed, the action resistance of the valve needle 500 can be reduced, and the working performance of the electronic expansion valve is guaranteed.
Optionally, at least one of the first step surface 111 and the third step surface 411 is concavely provided with a first air passing groove, and at least one of the second step surface 112 and the fourth step surface 412 is concavely provided with a second air passing groove communicated with the first air passing groove, so as to form the balance channel in the first air passing groove and the second air passing groove. Without loss of generality, in an embodiment, the first step surface 111, the second step surface 112, the third step surface 411 and the fourth step surface 412 are all provided in a ring shape, so that the installation step 410 and the step space 110 are respectively in a ring shape, the first step surface 111 and the third step surface 411 have both a portion abutted against each other and a portion recessed to form the first air passing groove, and similarly, the second step surface 112 and the fourth step surface 412 have both a portion abutted against each other and a portion recessed to form the second air passing groove. In this way, the mounting step 410 can be stably engaged with the step space 110, and a balance passage can be formed for the first valve chamber 1031 and the second valve chamber 1032 to communicate. In this embodiment, the first valve cavity 1031 is located at one side of the guide collar 400 far away from the valve port 104, two ends of the first air passing groove are respectively connected to one ends of the first valve cavity 1031 and the second air passing groove, and the other end of the second air passing groove is connected to the second valve cavity 1032, so that the communication between the first valve cavity 1031 and the second valve cavity 1032 can be realized, which is beneficial to ensuring the stability of the internal pressure of the electronic expansion valve, thereby ensuring the working stability of the electronic expansion valve.
Optionally, as shown in fig. 6, the outer wall of the guide collar 400 is further provided with a connection surface 430, the installation step 410 is connected to the diversion cone 420 through the connection surface 430, and the connection surface 430 is provided with an air passing hole 440 penetrating through the inner wall of the guide collar 400, so as to form the balance channel in the air passing hole 440. Specifically, a gap is provided between the connection surface 430 and the inner wall surface of the valve housing 100, and the connection surface 430 is disposed opposite to the first relief hole 402, and the air passing hole 440 penetrates from the connection surface 430 to the inner wall surface of the first relief hole 402. Thus, the first valve chamber 1031 can be communicated with the first relief hole 402 through the air passing hole 440. It can be understood that the first relief hole 402 is formed by avoiding the connecting portion 520, and has a larger gap with the connecting portion 520, and the second relief hole 403 is formed by avoiding the nut 200, and also has a larger gap with the nut 200, so that the spaces in the first relief hole 402 and the second relief hole 403 are all the spaces of the second valve cavity 1032. The first valve cavity 1031 is communicated with the first relief hole 402, that is, is communicated with the second valve cavity 1032, so that the stability of the internal pressure of the electronic expansion valve can be ensured, and the working stability of the electronic expansion valve can be ensured.
The invention also provides a refrigeration device, which comprises an electronic expansion valve, and the specific structure of the electronic expansion valve refers to the embodiment, and because the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. The refrigerating equipment can be an air conditioner, a refrigerator, a heat pump water heater and the like.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (11)
1. An electronic expansion valve, comprising:
the valve housing is provided with a valve cavity and a valve port communicated with the valve cavity;
the nut is arranged in the valve cavity;
the guide lantern ring is arranged in the valve cavity and is positioned at one side of the nut close to the valve port; and
the valve needle comprises a needle body and a connecting part which are connected, the needle body is inserted into the valve port after penetrating through the guide lantern ring, clearance fit is achieved between the needle body and the guide lantern ring and between the needle body and the valve port, and the connecting part is provided with a part positioned in an inner cavity of the nut and is arranged in clearance with the inner wall surface of the nut;
wherein, the fit clearance between the connecting part and the nut is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port, and the fit clearance between the needle body and the guide collar is larger than the minimum fit clearance between the needle body and the inner wall surface of the valve port;
the fit clearance between the connecting part and the nut is larger than the fit clearance between the needle body and the guide collar;
the nut is provided with a threaded hole and a first guide hole which are communicated, the threaded hole is located at one side, far away from the valve port, of the first guide hole, the connecting portion is in clearance fit with the first guide hole, the electronic expansion valve further comprises a valve rod, one end of the valve rod is in driving connection with the connecting portion, the other end of the valve rod is in threaded connection with the threaded hole and in clearance fit with the threaded hole, and the fit clearance between the valve rod and the threaded hole is larger than the fit clearance between the connecting portion and the first guide hole.
2. The electronic expansion valve of claim 1, wherein the guide sleeve ring is internally provided with a first abdication hole and a second guide hole which are distributed along the axial direction and communicated with each other, the needle body is arranged in the second guide hole in a penetrating way, and one end of the connecting part connected with the needle body protrudes out of the inner cavity of the nut and is accommodated in the first abdication hole.
3. The electronic expansion valve of claim 2, wherein a second relief hole is further provided in the guide sleeve, the second relief hole is connected to an end of the first relief hole away from the second guide hole, and the nut portion is accommodated in the second relief hole.
4. The electronic expansion valve of claim 1, wherein the needle body has a first end distal from the connecting portion, the first end being inserted into the valve port, the connecting portion having a second end distal from the needle body, the electronic expansion valve further comprising:
the bearing is fixedly arranged at the second end through the outer ring;
the valve rod is movably inserted into the inner ring of the bearing; and
and one end of the elastic piece is connected with the valve rod, and the other end of the elastic piece is connected with the bearing.
5. The electronic expansion valve of claim 4, wherein said connecting portion is recessed in a direction of said first end at said second end to form a mounting groove, and said bearing is fixedly mounted in said mounting groove by an outer race.
6. The electronic expansion valve of claim 5, wherein the mounting groove is provided with a first limit part and a second limit part distributed at two ends of the bearing, and the first limit part and the second limit part are fixed relative to the mounting groove and respectively abutted against two end surfaces of the outer ring of the bearing.
7. The electronic expansion valve according to claim 6, wherein the mounting groove has a first groove section and a second groove section distributed in an axial direction, an inner diameter of the first groove section is larger than an inner diameter of the second groove section, a limit step is formed at a communication place of the first groove section and the second groove section, and the first limit portion is the limit step;
and/or, the second limiting part is a limiting collar which is abutted against the end face of the outer ring of the bearing, which is far away from the first end, and the valve rod is inserted into the bearing after penetrating through the limiting collar.
8. The electronic expansion valve of claim 5, further comprising a drive collar fixedly sleeved on a distal end of the valve stem, the drive collar being positioned on a side of the bearing proximate the first end.
9. The electronic expansion valve according to claim 4, wherein the elastic member is provided as a spring, a peripheral wall of the valve stem is provided with a flange portion on a side of the bearing away from the first end, and the spring is fitted over the valve stem with one end abutting against the flange portion and the other end abutting against an end face of the bearing.
10. The electronic expansion valve according to any one of claims 1 to 9, wherein an installation step is convexly provided on an outer wall of the guide collar, and a step space is correspondingly provided on an inner wall of the valve housing, and the installation step is engaged with the step space;
and/or the side wall of the valve shell is provided with a refrigerant passing port, and the guide lantern ring is provided with a guide conical surface corresponding to the refrigerant passing port.
11. A refrigeration device comprising an electronic expansion valve according to any one of claims 1 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092702.1A CN114607781B (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
| CN202310912539.3A CN116717607A (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092702.1A CN114607781B (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310912539.3A Division CN116717607A (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114607781A CN114607781A (en) | 2022-06-10 |
| CN114607781B true CN114607781B (en) | 2024-02-20 |
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| CN202310912539.3A Pending CN116717607A (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
| CN202210092702.1A Active CN114607781B (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310912539.3A Pending CN116717607A (en) | 2022-01-26 | 2022-01-26 | Electronic expansion valve and refrigeration equipment |
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|---|---|---|---|---|
| CN109196259A (en) * | 2016-06-22 | 2019-01-11 | 株式会社鹭宫制作所 | Motor-driven valve |
| CN110345267A (en) * | 2018-04-02 | 2019-10-18 | 浙江三花制冷集团有限公司 | A kind of motor-driven valve |
| CN210123020U (en) * | 2019-04-29 | 2020-03-03 | 苏州华越金属有限公司 | Electronic expansion valve |
| CN210123016U (en) * | 2019-04-29 | 2020-03-03 | 苏州华越金属有限公司 | Electronic expansion valve |
| CN210372071U (en) * | 2019-04-29 | 2020-04-21 | 苏州华越金属有限公司 | Electronic expansion valve |
| CN112503189A (en) * | 2020-12-14 | 2021-03-16 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
| JP2021042820A (en) * | 2019-09-12 | 2021-03-18 | 株式会社テージーケー | Electric valve |
-
2022
- 2022-01-26 CN CN202310912539.3A patent/CN116717607A/en active Pending
- 2022-01-26 CN CN202210092702.1A patent/CN114607781B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109196259A (en) * | 2016-06-22 | 2019-01-11 | 株式会社鹭宫制作所 | Motor-driven valve |
| CN110345267A (en) * | 2018-04-02 | 2019-10-18 | 浙江三花制冷集团有限公司 | A kind of motor-driven valve |
| CN210123020U (en) * | 2019-04-29 | 2020-03-03 | 苏州华越金属有限公司 | Electronic expansion valve |
| CN210123016U (en) * | 2019-04-29 | 2020-03-03 | 苏州华越金属有限公司 | Electronic expansion valve |
| CN210372071U (en) * | 2019-04-29 | 2020-04-21 | 苏州华越金属有限公司 | Electronic expansion valve |
| JP2021042820A (en) * | 2019-09-12 | 2021-03-18 | 株式会社テージーケー | Electric valve |
| CN112503189A (en) * | 2020-12-14 | 2021-03-16 | 广东威灵电机制造有限公司 | Electronic expansion valve and refrigeration equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114607781A (en) | 2022-06-10 |
| CN116717607A (en) | 2023-09-08 |
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