CN114352752A - Electronic expansion valve, refrigeration equipment and automobile - Google Patents

Electronic expansion valve, refrigeration equipment and automobile Download PDF

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Publication number
CN114352752A
CN114352752A CN202210068673.5A CN202210068673A CN114352752A CN 114352752 A CN114352752 A CN 114352752A CN 202210068673 A CN202210068673 A CN 202210068673A CN 114352752 A CN114352752 A CN 114352752A
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CN
China
Prior art keywords
valve
hole
electronic expansion
limiting
port
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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
CN202210068673.5A
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Chinese (zh)
Inventor
刘振超
杨茂
吴延平
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
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Guangdong Welling Motor Manufacturing Co Ltd
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Publication date
Application filed by Guangdong Welling Motor Manufacturing Co Ltd filed Critical Guangdong Welling Motor Manufacturing Co Ltd
Priority to CN202210068673.5A priority Critical patent/CN114352752A/en
Publication of CN114352752A publication Critical patent/CN114352752A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00485—Valves for air-conditioning devices, e.g. thermostatic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K1/482—Attaching valve members to screw-spindles with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)

Abstract

The invention discloses an electronic expansion valve, refrigeration equipment and an automobile. The electronic expansion valve comprises a valve body, a valve rod and a valve core, wherein the valve body is provided with a valve cavity, a valve port and a limiting groove, and the valve port and the limiting groove are communicated with the valve cavity; the valve rod is arranged in the valve cavity and is rotatably connected with the valve body; the valve core is movably arranged in the valve cavity between an opening position and a closing position, one end of the valve rod extends into the valve core and is in threaded connection with the valve core, the valve core is provided with a limiting part, and the limiting part is in limiting fit with the limiting groove so as to limit the rotation of the valve core; when the valve core is at the closing position, the valve port is closed, and when the valve core is at the opening position, the valve port is opened. The electronic expansion valve can avoid abrasion between the valve core and the valve port.

Description

Electronic expansion valve, refrigeration equipment and automobile
Technical Field
The invention relates to the technical field of fluid control components, in particular to an electronic expansion valve, refrigeration equipment and an automobile.
Background
In the related art, the valve core rotates in the process of opening or closing the valve port, so that abrasion occurs between the valve core and the valve port, and the service life of the electronic expansion valve is influenced.
Disclosure of Invention
The invention mainly aims to provide an electronic expansion valve, aiming at avoiding abrasion between a valve core and a valve port.
In order to achieve the purpose, the electronic expansion valve provided by the invention comprises a valve body, a valve rod and a valve core, wherein the valve body is provided with a valve cavity, a valve port and a limiting groove, and the valve port and the limiting groove are communicated with the valve cavity; the valve rod is arranged in the valve cavity and is rotatably connected with the valve body; the valve core is movably arranged in the valve cavity between an opening position and a closing position, one end of the valve rod extends into the valve core and is in threaded connection with the valve core, the valve core is provided with a limiting part, and the limiting part is in limiting fit with the limiting groove so as to limit the rotation of the valve core; when the valve core is at the closing position, the valve port is closed, and when the valve core is at the opening position, the valve port is opened.
Optionally, the valve body includes a connecting seat and a valve core seat, the connecting seat is provided with a guide hole, the valve core is in guide fit with the guide hole, the valve rod is rotatably connected with the connecting seat, and the hole wall of the guide hole is recessed towards the outer side to form the limiting groove; the valve core seat is provided with the valve port and is connected to one end of the connecting seat.
Optionally, a lower stop portion is formed on one end, facing the valve port, of the limiting groove of the hole wall of the guide hole, and when the valve element is in the closed position, the limiting portion is in stop fit with the lower stop portion.
Optionally, the connecting seat is further provided with a placing hole communicated with one end of the guide hole away from the valve port, the electronic expansion valve further comprises a bearing, the bearing is mounted in the placing hole, and the valve rod is rotatably connected with the bearing.
Optionally, the aperture of the placement hole is larger than the aperture of the guide hole, a placement step surface is formed between the placement hole and the guide hole, the bearing is placed on the placement step surface, one end of the limiting groove away from the valve port is communicated with the placement hole, and when the valve element is in the open position, the limiting portion is in limiting fit with the bearing.
Optionally, the valve rod comprises a fixed section and a threaded section, and the fixed section is rotatably connected with the bearing; the thread section is connected with one end of the fixed section, which faces the valve port, and the thread section is inserted into the valve core and is in threaded connection with the valve core.
Optionally, the bearing is in interference fit with the fixed section.
Optionally, the valve element comprises a valve needle and a limit plate, the valve needle is provided with a threaded hole along an axial direction of the valve needle, and the threaded hole is in threaded connection with the threaded section; the limiting plate is connected with one end, deviating from the valve port, of the valve needle, and the outer peripheral wall of the limiting plate is convexly arranged along the radial direction of the valve body to form the limiting part.
Optionally, the valve rod further includes a connecting section connected to an end of the fixing section away from the valve port, and the electronic expansion valve further includes a rotor assembly fixedly connected to the connecting section.
Optionally, the connecting seat is further provided with a connecting hole communicated with one end of the guide hole facing the valve port, and the valve core seat is connected with the connecting hole.
Optionally, the valve core seat and the connecting hole are welded and fixed.
Optionally, the electronic expansion valve further includes a valve seat, the valve seat is provided with a mounting hole, and the valve body is mounted in the mounting hole.
Optionally, the mounting hole is including the first hole section and the second hole section that are linked together, the aperture of first hole section is greater than the aperture of second hole section, first hole section with form the installation step face between the second hole section, the periphery wall of connecting seat is equipped with annular convex part along circumference arch, annular convex part install in installation step face.
Optionally, the annular convex part is connected with the mounting step surface in a sealing manner.
The invention also proposes a refrigeration device comprising an electronic expansion valve as defined in any one of the above.
The invention also provides an automobile which comprises the refrigeration equipment.
The electronic expansion valve of the invention limits the rotation of the valve core in the process of opening or closing the valve port by the limit part and the limit groove in limit fit, thereby avoiding the abrasion between the valve core and the valve port and further ensuring the service life of the electronic expansion valve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a cross-sectional view of an electronic expansion valve in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the electronic expansion valve of FIG. 1 from another perspective;
FIG. 3 is a cross-sectional view of the connector holder of FIG. 1;
FIG. 4 is a schematic view of the connecting socket shown in FIG. 1;
FIG. 5 is a cross-sectional view of the valve cartridge of FIG. 1;
fig. 6 is a schematic structural view of the valve core in fig. 1.
The reference numbers illustrate:
Figure BDA0003481127540000031
Figure BDA0003481127540000041
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an electronic expansion valve 100, which is applied to a refrigeration system. The refrigerating system can be a refrigerating system of an air conditioner, a refrigerator, a heat pump water heater or other refrigerating and heating equipment. The electronic expansion valve 100 is able to control the refrigerant medium flow in the refrigeration system.
In an embodiment of the present invention, as shown in fig. 1 to 6, the electronic expansion valve 100 includes a valve body 10, a valve rod 20, and a valve core 30, where the valve body 10 has a valve cavity, and a valve port 121 and a limiting groove 112 which are communicated with the valve cavity; the valve rod 20 is arranged in the valve cavity, and the valve rod 20 is rotatably connected with the valve body 10; the valve core 30 is movably arranged in the valve cavity between an opening position and a closing position, one end of the valve rod 20 extends into the valve core 30 and is in threaded connection with the valve core 30, the valve core 30 is provided with a limiting part 321, and the limiting part 321 is in limiting fit with the limiting groove 112 to limit the rotation of the valve core 30; when the valve element 30 is in the closed position, the valve port 121 is closed, and when the valve element 30 is in the open position, the valve port 121 is opened.
In the present embodiment, the valve body 10 is in an elongated shape, and the valve cavity extends along the axial direction of the valve body 10. The inner peripheral wall of the valve body 10 is recessed towards the outside of the valve body 10 to form a limiting groove 112, and the limiting groove 112 extends along the axial direction of the valve body 10. The side wall of the valve body 10 is provided with an inlet 122 communicated with the valve cavity for the refrigerant to flow into the valve cavity. The valve port 121 is disposed at one axial end of the valve body 10, the valve port 121 is disposed coaxially with the axis of the valve body 10, and the valve port 121 is used for allowing a refrigerant to flow out of the valve cavity. The valve stem 20 extends in the axial direction of the valve body 10, and the valve stem 20 is disposed coaxially with the valve port 121. The valve element 30 extends in the axial direction of the valve body 10, and the valve element 30 is disposed coaxially with the valve port 121. The outer peripheral wall of the valve core 30 is provided with a limiting portion 321 protruding toward the valve body 10 along the radial direction of the valve body 10, and when the valve core 30 moves in the valve cavity, the limiting portion 321 moves in the limiting groove 112.
The electronic expansion valve 100 is provided with a driving assembly, the driving assembly is connected with the valve rod 20, the driving assembly drives the valve rod 20 to rotate, and the limiting groove 112 is in limiting fit with the limiting part 321 to limit the rotational freedom of the valve core 30, so that the valve core 30 in threaded fit with the valve rod 20 can reciprocate along the axial direction of the valve cavity, and the valve port 121 is opened or closed. Because the valve core 30 cannot rotate in the process of opening or closing the valve port 121, abrasion between the valve core 30 and the valve port 121 is avoided, and the service life of the electronic expansion valve 100 is ensured.
It can be understood that the open position of the valve element 30 is the position of the valve element 30 when the refrigerant outflow amount of the valve port 121 is maximum, and the closed position of the valve element 30 is the position of the valve element 30 when the refrigerant outflow amount of the valve port 121 is zero. The refrigerant flows into the valve cavity through the inlet 122, and flows out of the valve cavity through the valve port 121 when the valve core 30 is in the open position. Of course, the refrigerant may flow in the opposite direction, i.e., the refrigerant flows into the valve cavity through the valve port 121, and flows out of the valve cavity through the liquid inlet 122 when the valve element 30 is in the open position.
In the present embodiment, the length of the limit groove 112 extending in the axial direction of the valve body 10 is not less than the distance between the open position and the closed position, that is, the length of the limit groove 112 is greater than or equal to the distance between the open position and the closed position. The distance between the open position and the closed position may be understood as the distance between the open position and the closed position of the end surface of the valve element 30 facing the valve port 121.
If the length of the limiting groove 112 is greater than the distance between the open position and the closed position, that is, the valve element 30 moves a certain distance after moving to the open position or the closed position, it can be ensured that the valve port 121 is completely closed or the valve port 121 is completely opened, and it is avoided that the electronic expansion valve 100 opens or closes incompletely due to an error, thereby ensuring that the flow rate of the electronic expansion valve 100 is accurately adjusted. If the length of the limiting groove 112 is equal to the distance between the open position and the closed position, that is, the valve element 30 stops moving continuously when moving to the open position or the closed position, the length of the valve body 10 is reduced, and the electronic expansion valve 100 is miniaturized.
In this embodiment, the limiting portion 321 is adapted to the shape of the limiting groove 112, that is, the outer peripheral wall of the limiting portion 321 is attached to the groove wall of the limiting groove 112, so as to increase the contact area between the limiting portion 321 and the limiting groove 112, and avoid the fracture of the limiting portion 321 caused by the stress concentration of the limiting portion 321.
In the present embodiment, in the radial cross section of the valve body 10, the groove wall of the stopper groove 112 is formed in an arc shape, and the outer peripheral wall of the stopper portion 321 is formed in an arc shape. The arc-shaped arrangement is beneficial to evenly dispersing the stress between the limiting part 321 and the limiting groove 112.
In other embodiments, the groove wall of the limiting groove 112 and the outer circumferential wall of the limiting portion 321 may be provided in other shapes in the radial cross section of the valve body 10, which is not limited in this respect.
In this embodiment, the number of the limiting grooves 112 is two, the two limiting grooves 112 are respectively disposed on two opposite sides of the valve element 30, the number of the limiting portions 321 is two, and the two limiting portions 321 and the two limiting grooves 112 are disposed in a one-to-one correspondence manner. Namely, the two limiting portions 321 and the axis of the valve body 10 are located on the same straight line, and the two limiting grooves 112 and the axis of the valve body 10 are located on the same straight line, so that the two opposite sides of the valve core 30 are uniformly stressed, and the fracture of the connection between the limiting portions 321 and the valve core 30 is avoided.
In other embodiments, the number of the limiting grooves 112 and the limiting parts 321 may be other numbers, and the number of the limiting grooves 112 and the limiting parts 321 may also be different, but the number of the limiting grooves 112 is greater than the number of the limiting parts 321, and the number of the limiting grooves 112 and the number of the limiting parts 321 are not limited herein.
In one embodiment, as shown in fig. 1-3, the valve body 10 includes a connecting seat 11 and a valve core seat 12, the connecting seat 11 is provided with a guide hole 111, the valve core 30 is in guide fit with the guide hole 111, the valve rod 20 is rotatably connected with the connecting seat 11, and the hole wall of the guide hole 111 is recessed towards the outside to form the limiting groove 112; the valve core seat 12 has the valve port 121, and the valve core seat 12 is connected to one end of the connecting seat 11.
In this embodiment, the valve body 10 further includes a housing 13, the connecting seat 11 and the valve core seat 12 are sequentially connected along the axial direction of the valve body 10, and a valve cavity is formed among the housing 13, the connecting seat 11 and the valve core seat 12. The side wall of the valve core seat 12 is provided with an inlet 122, one end of the valve core seat 12 along the axial direction of the valve body 10 is provided with a valve port 121, and the valve port 121 is arranged coaxially with the axis of the valve core seat 12. When the valve core 30 is in the open position, one part of the valve core 30 is located in the connecting seat 11, the other part is located in the valve core seat 12, and when the valve core 30 is in the closed position, one part of the valve core 30 is located in the connecting seat 11, the other part is located in the valve core seat 12, and a part of the valve core 30 extends out of the valve port 121 to close the valve port 121. The guide hole 111 is coaxial with the valve port 121 to ensure the coaxiality between the valve element 30 and the valve port 121, prevent the valve element 30 from colliding with the valve port 121 when the valve port 121 is closed, and ensure that the valve element 30 is in place when the valve is closed, so that the flow rate of the electronic expansion valve 100 is accurately adjusted.
In an embodiment, as shown in fig. 1, 3 and 4, a lower stop portion 113 is formed on an end of the hole wall of the guide hole 111 facing the valve port 121 of the limiting groove 112, and when the valve element 30 is in the closed position, the limiting portion 321 is in stop fit with the lower stop portion 113.
In the present embodiment, the length of the stopper groove 112 is smaller than the length of the guide hole 111, that is, the stopper groove 112 does not penetrate through the upper and lower ends of the guide hole 111 in the axial direction of the valve body 10. For example, two cavities are disposed at two ends of the guiding hole 111, the guiding hole 111 is communicated with the two cavities, and the limiting groove 112 is communicated with at most one of the two cavities, i.e. at least one end of the limiting groove 112 is closed. In this embodiment, one end of the limiting groove 112 facing the valve port 121 is closed, a lower stop portion 113 is formed, and the lower stop portion 113 is connected to the limiting portion 321 in a stopping manner to limit the movement stroke of the valve element 30 in the direction of the valve port 121, so as to determine the closing position of the valve element 30.
In an embodiment, as shown in fig. 1 to fig. 3, the connecting seat 11 is further provided with a placing hole 114 communicating with an end of the guiding hole 111 away from the valve port 121, the electronic expansion valve 100 further includes a bearing 40, the bearing 40 is mounted in the placing hole 114, and the valve rod 20 is rotatably connected to the bearing 40.
In the present embodiment, the placement hole 114 is provided coaxially with the guide hole 111. The bearing 40 comprises an outer ring and an inner ring arranged in the outer ring, the outer ring and the inner ring are coaxially arranged, the outer ring of the bearing 40 is fixedly connected with the hole wall of the placing hole 114, the valve rod 20 is fixedly connected with the inner ring of the bearing 40 in a penetrating mode, the inner ring can rotate relative to the outer ring, and therefore the valve rod 20 can rotate relative to the connecting seat 11.
In one embodiment, as shown in fig. 3, the diameter of the placing hole 114 is larger than the diameter of the guiding hole 111, a placing step surface 115 is formed between the placing hole 114 and the guiding hole 111, the bearing 40 is placed on the placing step surface 115, one end of the limiting groove 112 away from the valve port 121 communicates with the placing hole 114, and when the valve element 30 is in the open position, the limiting portion 321 is in limiting fit with the bearing 40.
In the present embodiment, an end of the outer ring of the bearing 40 facing the valve port 121 is connected to the placement step surface 115. The hole wall of the placing hole 114 is circumferentially provided with a clamping groove 118, the axial distance between the clamping groove 118 and the placing step surface 115 is the thickness of the bearing 40, and the clamping sheet 90 is arranged on the clamping groove 118 to cooperate with the placing step surface 115 to fix the bearing 40 in the placing hole 114. In the embodiment, one end of the bearing 40 facing the valve port 121 is stopped by the stopper 321 to limit the movement stroke of the valve element 30 in the direction away from the valve port 121, so as to determine the open position of the valve element 30.
In one embodiment, as shown in fig. 1-2, the valve stem 20 includes a fixed section 21 and a threaded section 22, and the fixed section 21 is rotatably connected to the bearing 40; the threaded section 22 is connected with one end of the fixed section 21 facing the valve port 121, and the threaded section 22 is inserted into the valve element 30 and is in threaded connection with the valve element 30.
In this embodiment, the fixed section 21 extends axially along the valve body 10, the threaded section 22 extends axially along the valve body 10, and the fixed section 21 and the threaded section 22 are sequentially connected axially along the valve body 10. The fixing section 21 is fixedly connected to the inner ring of the bearing 40, thereby fixing the valve stem 20 to the inner ring of the bearing 40. The outer peripheral wall of the threaded section 22 is provided with external threads, the valve core 30 is provided with a threaded hole 311, the threaded hole 311 is provided with internal threads, and the threaded section 22 is in threaded fit with the threaded hole 311 so as to realize transmission of driving force between the valve rod 20 and the valve core 30.
In one embodiment, as shown in fig. 1-2, the bearing 40 is an interference fit with the stationary segment 21.
In the present embodiment, the outer circumferential wall of the fixing section 21 is in interference fit with the inner circumferential wall of the inner ring of the bearing 40 to fix the valve stem 20 on the bearing 40, and the outer circumferential wall of the fixing section 21 and the inner circumferential wall of the inner ring of the bearing 40 are not damaged. Of course, in other embodiments, it is also possible that the outer circumferential wall of the fixing section 21 is welded and fixed to the inner circumferential wall of the inner ring of the bearing 40 to ensure the connection strength between the valve stem 20 and the bearing 40.
In one embodiment, as shown in fig. 1, 2 and 5, the valve element 30 includes a valve needle 31 and a limit plate 32, the valve needle 31 is provided with a threaded hole 311 along an axial direction thereof, and the threaded hole 311 is in threaded connection with the threaded section 22; the limit plate 32 is connected to an end of the valve needle 31 away from the valve port 121, and the outer peripheral wall of the limit plate 32 is protruded along the radial direction of the valve body 10 to form the limit portion 321.
In the present embodiment, the valve needle 31 is disposed in a cylindrical shape and extends in the axial direction of the valve body 10. The valve needle 31 is in guiding fit with the guiding hole 111, the valve needle 31 is coaxially arranged with the valve port 121, and the threaded hole 311 is coaxially arranged with the valve port 121, so as to ensure the coaxiality between the valve needle 31 and the valve port 121, thereby ensuring the reliability of opening and closing the electronic expansion valve 100. The valve needle 31 is provided with a convex connecting part at one end deviating from the valve port 121, the limiting plate 32 is provided with a fixing hole, and the convex connecting part is fixed with the fixing hole in an interference fit manner or in a welding manner so as to fix the limiting plate 32 at one end deviating from the valve port 121 of the valve needle 31. In a radial section of the valve body 10, a stopper portion 321 protrudes from an outer peripheral wall of the needle 31 to be connected to the stopper groove 112.
In an embodiment, as shown in fig. 1-2, the valve stem 20 further includes a connecting section 23 connected to an end of the fixing section 21 away from the valve port 121, and the electronic expansion valve 100 further includes a rotor assembly 50 fixedly connected to the connecting section 23.
In the present exemplary embodiment, the connecting section 23 extends axially along the valve body 10. The rotor assembly 50 is provided with a through hole, and the through hole is in interference fit connection or welded connection with the connecting section 23 to ensure the connection strength between the rotor assembly 50 and the connecting section 23. The electronic expansion valve 100 further includes a stator assembly annularly disposed on the outer periphery of the housing 13, and the stator assembly is disposed corresponding to the rotor assembly 50.
It will be appreciated that the stator assembly is energized to drive the rotor assembly 50 to rotate, thereby rotating the valve stem 20 fixedly connected to the rotor assembly 50, and thereby moving the valve cartridge 30, which is threadably connected to the valve stem 20, axially along the valve body 10 to open the valve port 121 or close the valve port 121.
In an embodiment, as shown in fig. 1 to 3, the connecting seat 11 is further provided with a connecting hole 116 communicating with an end of the guide hole 111 facing the valve port 121, and the valve core seat 12 is connected with the connecting hole 116.
In the present embodiment, the limiting groove 112 is not communicated with the connecting hole 116. The connecting hole 116 is coaxially disposed with the guide hole 111 to ensure the coaxiality between the valve core seat 12 connected to the connecting hole 116 and the guide hole 111, so as to ensure the coaxiality between the valve port 121 on the valve core seat 12 and the guide hole 111, and further ensure the reliability of the electronic expansion valve 100.
In one embodiment, as shown in fig. 1-2, the valve core seat 12 is welded to the connection hole 116.
In this embodiment, the outer peripheral wall of the end of the valve core seat 12 away from the valve port 121 is welded and fixed to the hole wall of the connection hole 116, so as to ensure the connection strength between the valve core seat 12 and the connection seat 11. In other embodiments, it is also possible that the outer peripheral wall of the end of the valve core seat 12 facing away from the valve port 121 is fixed in interference fit with the hole wall of the connecting hole 116.
In one embodiment, as shown in fig. 1-2, the electronic expansion valve 100 further includes a valve seat 60, the valve seat 60 is provided with a mounting hole 61, and the valve body 10 is mounted in the mounting hole 61.
In the present embodiment, the valve seat 60 serves as a carrier for mounting the valve body 10 to mount the valve body 10 in the refrigeration appliance. The mounting hole 61 extends in the axial direction of the valve body 10, the connecting seat 11 and the valve element 30 of the valve body 10 are disposed in the mounting hole 61, the housing 13 of the valve body 10 is disposed outside the mounting hole 61, and the stator assembly is mounted on the valve seat 60. The valve seat 60 is further provided with a fluid inflow channel 62 and a fluid outflow channel 63 which are communicated with the mounting hole 61, the fluid inflow channel 62 is disposed corresponding to the inlet 122, and the fluid outflow channel 63 is disposed corresponding to the valve port 121.
It will be appreciated that the refrigerant flows into the valve chamber through the fluid inflow channel 62 and the liquid inlet 122 in sequence, and when the valve needle 31 opens the valve port 121, the refrigerant flows through the valve port 121 to the fluid outlet pipe. Of course, the refrigerant may also flow in the opposite direction, that is, the refrigerant flows into the valve chamber through the valve port 121 and the fluid outflow pipe in sequence, and when the valve needle 31 opens the valve port 121, the refrigerant flows to the fluid inflow channel 62 through the liquid inlet 122.
In an embodiment, as shown in fig. 1-2, the mounting hole 61 includes a first hole segment 611 and a second hole segment 612 that are communicated with each other, the aperture of the first hole segment 611 is larger than the aperture of the second hole segment 612, a mounting step surface 613 is formed between the first hole segment 611 and the second hole segment 612, an annular protrusion 117 is convexly provided on the outer circumferential wall of the connecting seat 11 along the circumferential direction, and the annular protrusion 117 is mounted on the mounting step surface 613.
In this embodiment, the first hole section 611 and the second hole section 612 are both disposed to extend along the axial direction of the valve body 10, the first hole section 611 is disposed on the surface of the valve body 10, and the second hole section 612 is disposed at the bottom of the first hole section 611. The outer peripheral wall of the annular protrusion 117 is connected to the wall of the first hole section 611, the side wall of the annular protrusion 117 facing the valve port 121 overlaps the mounting step surface 613 to mount the connecting seat 11 in the first hole section 611, the portion of the connecting seat 11 located on the side of the annular protrusion 117 facing the valve port 121 is inserted into the second hole section 612, and the valve core seat 12 is disposed in the second hole section 612.
In this embodiment, the electronic expansion valve 100 further includes an annular sleeve 70, the annular sleeve 70 is sleeved outside the connecting seat 11, an outer peripheral wall of the annular sleeve 70 is provided with an external thread, a hole wall of the first hole section 611 is provided with an internal thread, the outer peripheral wall of the annular sleeve 70 is in threaded fit with the hole wall of the first hole section 611, one side of the annular sleeve 70 facing the valve port 121 is pressed against one side of the annular protrusion 117 away from the valve port 121, so as to press the annular protrusion 117 against the installation step surface 613, thereby ensuring the sealing property between the annular protrusion 117 and the installation step surface 613, and preventing the refrigerant from leaking and external liquid from permeating into the valve seat 60.
In other embodiments, it is also possible that the outer peripheral wall of the annular protrusion 117 is fixed by interference fit or welding with the hole wall of the first hole section 611.
In one embodiment, as shown in fig. 1-2, the annular protrusion 117 is sealingly coupled to the mounting step surface 613.
In this embodiment, the electronic expansion valve 100 further includes a gasket 80, the gasket 80 is disposed between the annular protrusion 117 and the mounting step surface 613, and the annular sleeve 70 is screwed to tightly press the annular protrusion 117, so as to press the gasket 80, thereby ensuring the sealing performance between the connecting seat 11 and the valve seat 60 and preventing the refrigerant from leaking, and the thickness of the gasket 80 is relatively thin, so that the height of the electronic expansion valve 100 can be reduced while ensuring the sealing performance between the connecting seat 11 and the valve seat 60. The gasket 80 is made of metal material, has higher strength,
in other embodiments, it is also possible that the electronic expansion valve 100 includes a sealing ring, and the installation step surface 613 and/or the annular protrusion 117 are/is provided with a sealing groove on a side facing the valve port 121, and the sealing ring is installed in the sealing groove to ensure the sealing property between the connection seat 11 and the valve seat 60. The sealing ring is soft sealing, and the sealing performance is better. The soft seal refers to a sealing material which is made of metal material on one side of two sides of a sealing pair and elastic non-metal material on the other side, and is called as 'soft seal'.
The attachment step surface 613 may be in close contact with the side wall of the annular projection 117 facing the valve port 121, that is, a hard seal may be provided between the attachment step surface 613 and the side wall of the annular projection 117 facing the valve port 121, so that the seal life is long. Hard seals are referred to as "hard seals" where both sides of the seal pair are of metallic or other relatively hard material.
The present invention further provides a refrigeration device, which includes an electronic expansion valve 100, and the specific structure of the electronic expansion valve 100 refers to the above embodiments, and since the refrigeration device adopts all technical solutions of all the above embodiments, at least all beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not described in detail herein.
The invention further provides an automobile which comprises the refrigeration equipment, the specific structure of the refrigeration equipment refers to the embodiments, and the automobile adopts all the technical schemes of all the embodiments, so that all the beneficial effects brought by the technical schemes of the embodiments are at least achieved, and the detailed description is omitted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (16)

1. An electronic expansion valve, comprising:
the valve body is provided with a valve cavity, a valve port and a limiting groove, wherein the valve port and the limiting groove are communicated with the valve cavity;
the valve rod is arranged in the valve cavity and is rotatably connected with the valve body; and the number of the first and second groups,
the valve core is movably arranged in the valve cavity between an opening position and a closing position, one end of the valve rod extends into the valve core and is in threaded connection with the valve core, the valve core is provided with a limiting part, and the limiting part is in limiting fit with the limiting groove so as to limit the rotation of the valve core;
when the valve core is at the closing position, the valve port is closed, and when the valve core is at the opening position, the valve port is opened.
2. The electronic expansion valve of claim 1, wherein the valve body comprises:
the valve rod is rotatably connected with the connecting seat, and the hole wall of the guide hole is recessed towards the outer side to form the limiting groove; and the number of the first and second groups,
and the valve core seat is provided with the valve port and is connected to one end of the connecting seat.
3. The electronic expansion valve according to claim 2, wherein a lower stop portion is formed on the wall of the guide hole at an end of the limiting groove facing the valve port, and the limiting portion cooperates with the lower stop portion when the valve element is in the closed position.
4. The electronic expansion valve according to claim 2, wherein the connecting seat further has a placement hole communicating with an end of the guide hole away from the valve port, the electronic expansion valve further comprises a bearing, the bearing is mounted in the placement hole, and the valve stem is rotatably connected to the bearing.
5. The electronic expansion valve according to claim 4, wherein the placement hole has a larger diameter than the guide hole, a placement step surface is formed between the placement hole and the guide hole, the bearing is placed on the placement step surface, one end of the limiting groove facing away from the valve port communicates with the placement hole, and the limiting portion is in limiting engagement with the bearing when the valve element is in the open position.
6. The electronic expansion valve of claim 4, wherein the valve stem comprises:
the fixed section is rotatably connected with the bearing; and the number of the first and second groups,
and the threaded section is connected with one end of the fixed section, which faces the valve port, and is inserted into the valve core and is in threaded connection with the valve core.
7. The electronic expansion valve of claim 6, wherein the bearing is an interference fit with the fixed segment.
8. The electronic expansion valve of claim 6, wherein the valve spool comprises:
the valve needle is provided with a threaded hole along the axial direction of the valve needle, and the threaded hole is in threaded connection with the threaded section; and the number of the first and second groups,
the limiting plate is connected with one end, deviating from the valve port, of the valve needle, and the outer peripheral wall of the limiting plate is convexly arranged along the radial direction of the valve body to form the limiting part.
9. The electronic expansion valve of claim 6, wherein the valve stem further comprises a connecting section connected to an end of the fixed section facing away from the valve port, and the electronic expansion valve further comprises a rotor assembly fixedly connected to the connecting section.
10. The electronic expansion valve according to claim 2, wherein the connecting seat further has a connecting hole communicating with an end of the guide hole facing the valve port, and the valve core seat is connected to the connecting hole.
11. The electronic expansion valve according to claim 10, wherein the valve core seat is welded and fixed to the connection hole.
12. The electronic expansion valve according to any of claims 2-11, further comprising a valve seat provided with mounting holes, the valve body being mounted to the mounting holes.
13. The electronic expansion valve according to claim 12, wherein the mounting hole comprises a first hole section and a second hole section that are communicated with each other, the first hole section has a larger hole diameter than the second hole section, a mounting step surface is formed between the first hole section and the second hole section, and an annular protrusion is convexly provided on the outer peripheral wall of the connecting seat in the circumferential direction, and the annular protrusion is mounted on the mounting step surface.
14. The electronic expansion valve of claim 13, wherein the annular protrusion sealingly engages the mounting step surface.
15. A refrigeration device comprising an electronic expansion valve according to any of claims 1-14.
16. A vehicle comprising a refrigeration unit according to claim 15.
CN202210068673.5A 2022-01-20 2022-01-20 Electronic expansion valve, refrigeration equipment and automobile Pending CN114352752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210068673.5A CN114352752A (en) 2022-01-20 2022-01-20 Electronic expansion valve, refrigeration equipment and automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210068673.5A CN114352752A (en) 2022-01-20 2022-01-20 Electronic expansion valve, refrigeration equipment and automobile

Publications (1)

Publication Number Publication Date
CN114352752A true CN114352752A (en) 2022-04-15

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CN (1) CN114352752A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019179517A1 (en) * 2018-03-23 2019-09-26 浙江三花智能控制股份有限公司 Electronic expansion valve
CN111594628A (en) * 2019-02-20 2020-08-28 浙江新劲空调设备有限公司 Electronic expansion valve
CN111765251A (en) * 2019-03-30 2020-10-13 浙江三花智能控制股份有限公司 Electronic expansion valve
CN212564642U (en) * 2020-05-28 2021-02-19 杭州三花研究院有限公司 Valve device
CN113124185A (en) * 2019-12-30 2021-07-16 浙江三花智能控制股份有限公司 Electronic expansion valve
CN215293665U (en) * 2021-04-26 2021-12-24 浙江三花汽车零部件有限公司 Electric valve
CN113932018A (en) * 2020-06-29 2022-01-14 浙江三花智能控制股份有限公司 Electronic expansion valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019179517A1 (en) * 2018-03-23 2019-09-26 浙江三花智能控制股份有限公司 Electronic expansion valve
CN111594628A (en) * 2019-02-20 2020-08-28 浙江新劲空调设备有限公司 Electronic expansion valve
CN111765251A (en) * 2019-03-30 2020-10-13 浙江三花智能控制股份有限公司 Electronic expansion valve
CN113124185A (en) * 2019-12-30 2021-07-16 浙江三花智能控制股份有限公司 Electronic expansion valve
CN212564642U (en) * 2020-05-28 2021-02-19 杭州三花研究院有限公司 Valve device
CN113932018A (en) * 2020-06-29 2022-01-14 浙江三花智能控制股份有限公司 Electronic expansion valve
CN215293665U (en) * 2021-04-26 2021-12-24 浙江三花汽车零部件有限公司 Electric valve

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