CN117515198A - Electronic expansion valve and refrigeration equipment - Google Patents

Electronic expansion valve and refrigeration equipment Download PDF

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Publication number
CN117515198A
CN117515198A CN202210896201.9A CN202210896201A CN117515198A CN 117515198 A CN117515198 A CN 117515198A CN 202210896201 A CN202210896201 A CN 202210896201A CN 117515198 A CN117515198 A CN 117515198A
Authority
CN
China
Prior art keywords
valve
port
electronic expansion
guide sleeve
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210896201.9A
Other languages
Chinese (zh)
Inventor
杨茂
陈超
任纬峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Welling Motor Manufacturing Co Ltd
Original Assignee
Guangdong Welling Motor Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Welling Motor Manufacturing Co Ltd filed Critical Guangdong Welling Motor Manufacturing Co Ltd
Priority to CN202210896201.9A priority Critical patent/CN117515198A/en
Priority to PCT/CN2023/096408 priority patent/WO2024021821A1/en
Publication of CN117515198A publication Critical patent/CN117515198A/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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • F16K3/267—Combination of a sliding valve and a lift valve
    • 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
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • 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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—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
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/316—Guiding of the slide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
    • F16K31/508—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating element being rotatable, non-rising, and driving a non-rotatable axially-sliding element
    • 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
    • F16K39/00—Devices for relieving the pressure on the sealing faces
    • F16K39/04—Devices for relieving the pressure on the sealing faces for sliding 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
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

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

Abstract

The invention discloses an electronic expansion valve and refrigeration equipment, wherein the electronic expansion valve comprises a valve seat, a connecting seat, a guide sleeve, a valve port seat, a valve needle assembly, a nut assembly and a valve shell. According to the electronic expansion valve, the connecting seat and the guide sleeve are arranged in a split mode, so that the processing requirements on the connecting seat and the guide sleeve are reduced, the processing allowance is small, the abrasion degree on a cutter is small, the consumption of materials can be reduced, meanwhile, the balance channel is further arranged in the electronic expansion valve, the pressure balance in the electronic expansion valve is ensured, and the material requirements on a coil and a rotor are reduced. The electronic expansion valve can solve the problem of high production cost of the electronic expansion valve.

Description

Electronic expansion valve and refrigeration equipment
Technical Field
The invention relates to the technical field of fluid control components, in particular to an electronic expansion valve and refrigeration equipment.
Background
The electronic expansion valve is an important part in the refrigeration system and mainly plays roles of throttling, depressurization and flow regulation. In the related art, the electronic expansion valve comprises a valve seat assembly, a nut assembly, a valve needle assembly, a magnetic rotor assembly and other parts, wherein the valve seat assembly is provided with a valve port, and when the electronic expansion valve works, the magnetic rotor assembly is driven to rotate through an electrified coil encircling the outside of the valve housing, so that the valve needle assembly is driven to axially move, and further the valve port is controlled to open or close, so that the functions of throttling, reducing pressure and regulating flow are realized.
The connecting seat and the guide sleeve in the existing electronic expansion valve are generally arranged into an integral structure, the connecting seat and the guide sleeve are connected with a valve body, a shell and the like and guide functions of a valve needle are simultaneously achieved, a rod is generally selected for processing during processing, however, the connecting seat and the guide sleeve are limited by the inner structure of the valve seat, the diameter of the lower end of the rod after processing is smaller than that of the upper end of the rod, therefore, when the lower end of the rod is processed, the processing allowance is large, the processing time of a part is long, the abrasion degree of a cutter is large, the service life of the cutter is low, the cutter needs to be replaced frequently, the production cost is high, meanwhile, the electronic expansion valve needs a large driving force during working due to pressure difference between two ends of a valve needle component in the electronic expansion valve, and the material requirements on a coil and a rotor are high, so that the production cost is further increased.
Disclosure of Invention
The invention mainly aims to provide an electronic expansion valve, which aims to solve the problem of high production cost of the electronic expansion valve.
In order to achieve the above object, the present invention provides an electronic expansion valve, including:
a valve seat, one end of which is provided with a port, and the valve seat is provided with a valve cavity communicated with the port;
the connecting seat is arranged at the port;
the guide sleeve is arranged in the valve cavity and connected with the connecting seat, and the lower end surface of the guide sleeve divides the valve cavity into a first valve cavity and a second valve cavity;
the valve port seat is arranged in the valve cavity and is provided with a valve port, and the first valve cavity and the second valve cavity can be communicated through the valve port;
the valve needle assembly is movably arranged on the guide sleeve and comprises a valve head, and the valve head is movably inserted into the valve port to open or close the valve port; the inner space of the valve head is communicated with the valve port, and the valve head is provided with a first balance hole;
the nut component is arranged on the connecting seat and is in threaded fit with the valve needle component, and the nut component is provided with a second balance hole; and
the valve shell is arranged on the connecting seat and sleeved outside the nut component and the valve needle component, and a containing cavity is formed in the valve shell;
the nut component, the valve needle component and the connecting seat are provided with a channel therebetween, the channel can be communicated with the inner space of the valve head through the first balance hole, and the channel can be communicated with the accommodating cavity through the second balance hole.
In an embodiment, the connecting seat is provided with a first through hole and a second through hole communicated with the first through hole, and the guide sleeve comprises a mounting part which stretches into the second through hole and is connected with the connecting seat.
In one embodiment, the guide sleeve is welded to the connection block.
In an embodiment, the guide sleeve is riveted with the connection seat.
In an embodiment, the guide sleeve further comprises a guide portion, the guide portion is connected with the mounting portion, a riveting surface is formed on the lower end face of the first through hole, and the guide portion stretches into the second through hole and abuts against the riveting surface through self deformation.
In an embodiment, the guide sleeve further comprises a body portion, the body portion is connected with the mounting portion, a first limiting portion is formed on the upper end face of the body portion, and the first limiting portion abuts against the lower end face of the connecting seat.
In an embodiment, the number of the first balance holes is greater than or equal to 1, and/or the number of the second balance holes is greater than or equal to 1.
In an embodiment, the connecting seat comprises a positioning section and an extending section, the positioning section is connected with the extending section, the positioning section is provided with external threads, the inner wall surface of the port is provided with internal threads, and the positioning section is in threaded connection with the inner wall surface of the port.
In an embodiment, the outer wall surface of the extension section is provided with a groove, and the electronic expansion valve further comprises a sealing element, and the sealing element is arranged in the groove and is abutted to the inner wall surface of the valve seat.
In an embodiment, the maximum diameter of the connecting seat is D1, and the maximum diameter of the guide sleeve is D2, wherein D1 > D2.
In an embodiment, the electronic expansion valve further comprises a connecting piece, the connecting piece is arranged at the joint of the nut component and the connecting seat, and a through hole corresponding to the second balance hole is formed in the connecting piece.
In an embodiment, the valve seat further has a first port and a second port, the guide sleeve has a medium circulation cavity, the first port is communicated with the first valve cavity, the first valve cavity is communicated with the medium circulation cavity, the valve port is communicated with the second valve cavity, and the second valve cavity is communicated with the second port; the first port and the second port communicate when the valve head opens the valve port.
The invention also provides refrigeration equipment comprising the electronic expansion valve. The electronic expansion valve includes:
a valve seat, one end of which is provided with a port, and the valve seat is provided with a valve cavity communicated with the port;
the connecting seat is arranged at the port;
the guide sleeve is arranged in the valve cavity and connected with the connecting seat, and the lower end surface of the guide sleeve divides the valve cavity into a first valve cavity and a second valve cavity;
the valve port seat is arranged on the guide sleeve and is provided with a valve port, and the first valve cavity and the second valve cavity can be communicated through the valve port;
the valve needle assembly is movably arranged on the guide sleeve and comprises a valve head, and the valve head is movably inserted into the valve port to open or close the valve port; the inner space of the valve head is communicated with the valve port, and the valve head is provided with a first balance hole;
the nut component is arranged on the connecting seat and is in threaded fit with the valve needle component, and the nut component is provided with a second balance hole; and
the valve shell is arranged on the connecting seat and sleeved outside the nut component and the valve needle component, and a containing cavity is formed in the valve shell;
the nut component, the valve needle component and the connecting seat are provided with a channel therebetween, the channel can be communicated with the inner space of the valve head through the first balance hole, and the channel can be communicated with the accommodating cavity through the second balance hole.
In an embodiment, the refrigeration device is an air conditioner, a freezer, a refrigerator, or a heat pump water heater.
The electronic expansion valve comprises a valve seat, a connecting seat, a guide sleeve, a valve port seat, a valve needle assembly, a nut assembly and a valve shell. According to the electronic expansion valve, the connecting seat and the guide sleeve are arranged in a split mode, when the guide sleeve and the connecting seat are processed respectively, the processing allowance is small, the processing time is short, and the production efficiency can be improved; meanwhile, the processing allowance is small, the loss of raw materials can be further reduced, and the cost is reduced; further, when the guide sleeve and the connecting seat are respectively processed, the abrasion degree of the cutter is also small, the cutter does not need to be frequently replaced, the service life of the cutter is prolonged, and the cost is further reduced. Furthermore, a balance channel is also arranged in the electronic expansion valve, so that the pressure balance in the electronic expansion valve is ensured, the material requirements on the coil and the rotor are reduced, and the production cost of the electronic expansion valve is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an electronic expansion valve according to an embodiment of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic view of the valve seat of the electronic expansion valve of FIG. 1;
FIG. 4 is a schematic diagram of a connection seat of the electronic expansion valve in FIG. 1;
FIG. 5 is an exploded view of a portion of the construction of the electronic expansion valve of FIG. 1;
FIG. 6 is a schematic view of a welded structure of a connecting seat and a guide sleeve;
FIG. 7 is a schematic illustration of a structure of a connecting seat and a guide sleeve riveted;
fig. 8 is an enlarged view at B in fig. 7.
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.
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 embodiment of an electronic expansion valve, which is an important part in a refrigeration system and mainly plays roles of throttling, reducing pressure and regulating flow. The existing electronic expansion valve comprises a valve seat, a nut component and a valve needle component in threaded fit with the nut component, the valve needle component is driven by a magnetic rotor component to generate axial movement, and the opening of a valve port is regulated, so that the circulation control of media is realized. According to the electronic expansion valve, the connecting seat and the guide sleeve are arranged in a split mode, and the two parts are machined independently during machining, so that machining allowance is reduced, consumed materials are few, production cost is reduced, meanwhile, the balance channel is arranged in the electronic expansion valve, pressure balance in the electronic expansion valve is guaranteed, further, the requirement on coil driving force is reduced, and cost reduction on coil and rotor materials is achieved.
The electronic expansion valve can be applied to an air conditioning system of an automobile, and a fluid medium flowing through the electronic expansion valve is a refrigerant used for performing cold and heat exchange in the air conditioning system. At this time, the electronic expansion valve is installed at the inlet of the evaporator of the air conditioning system, and the electronic expansion valve is used as a demarcation element between the high-pressure side and the low-pressure side of the air conditioning system, so that the high-pressure liquid refrigerant from the liquid storage dryer and other devices is throttled and depressurized, and the dosage of the liquid refrigerant entering the evaporator is regulated and controlled, so that the dosage of the liquid refrigerant can meet the requirements of external refrigeration load. Or, the electronic expansion valve may be applied to other types of refrigeration apparatuses, and the fluid medium flowing through the electronic expansion valve may be other fluid medium besides a refrigerant, so long as the electronic expansion valve can realize throttling and depressurization of the fluid medium, which is not particularly limited.
Referring to fig. 1 to 8, in an embodiment of the present invention, the electronic expansion valve 10 includes a valve seat 100, a connecting seat 200, a guide sleeve 300, a valve seat 400, a valve needle assembly 500, a nut assembly 600, and a valve housing 700. A port 110 is formed at one end of the valve seat 100, and the valve seat 100 has a valve chamber 120 communicating with the port 110; the connection seat 200 is disposed at the port 110; the guide sleeve 300 is arranged on the valve cavity 120, the guide sleeve 300 is connected with the connecting seat 200, the lower end surface of the guide sleeve 300 divides the valve cavity 120 into a first valve cavity 121 and a second valve cavity 122, the valve port seat 400 is arranged on the valve cavity 120, the valve port seat 400 is provided with a valve port 410, and the first valve cavity 121 and the second valve cavity 122 can be communicated through the valve port 410; the valve needle assembly 500 is movably disposed on the guide sleeve 300, the valve needle assembly 500 includes a valve head 520, and the valve head 520 is movably inserted into the valve port 410 to open or close the valve port 410; the inner space of the valve head 520 is communicated with the valve port 410, and the valve head 520 is provided with a first balance hole 521; the nut assembly 600 is disposed on the connection seat 200 and is in threaded engagement with the valve needle assembly 500, and the nut assembly 600 is provided with a second balance hole 610; the valve housing 700 is disposed on the connecting seat 200 and is sleeved outside the nut assembly 600 and the valve needle assembly 500, and a receiving cavity 710 is formed in the valve housing 700; wherein a passage 800 is formed among the nut assembly 600, the needle assembly 500 and the coupling seat 200, the first balancing hole 521 may communicate the passage 800 with the inner space of the valve head 520, and the second balancing hole 610 may communicate the passage 800 with the receiving chamber 710.
It should be emphasized that the valve seat 100 of the electronic expansion valve 10 may be a valve seat 100 specially used for mounting the electronic expansion valve components such as the guide sleeve 300, the connecting seat 200, the valve seat 400, etc. to form a single electronic expansion valve 10, or the valve seat 100 may also be a valve seat 100 of an integrated module, where the electronic expansion valve components such as the guide sleeve 300, the connecting seat 200, the valve seat 400, etc. of the present application may be mounted on the valve seat 100 of the integrated module, and other structural components. The valve seat 100 may be manufactured by machining of stainless steel material, machining of aluminum material, or machining of other materials, without particular limitation. The valve seat 100 may be cylindrical, square, or other contoured in shape. One end of the valve seat 100 is formed with a port 110, the port 110 is specifically a stepped hole, the connecting seat 200 is fixedly installed in the stepped hole, and for facilitating the later disassembly and assembly, the connecting seat 200 can be in threaded connection with the inner wall of the stepped hole. The valve seat 100 is also internally provided with a valve cavity 120, the valve cavity 120 is communicated with the port 110, a first connector 130 and a second connector 140 can be arranged on the valve seat 100, the first connector 130 and the second connector 140 are used for connecting pipelines, and the first connector 130 and the second connector 140 can be communicated through the valve cavity 120, so that fluid medium can enter from the first connector 130 and flow out from the second connector 140 through the valve cavity 120; conversely, fluid medium may also enter from the second port 140 and exit from the first port 130 through the valve chamber 120, i.e., fluid medium may flow into the valve chamber 120 from either the first port 130 or the second port 140 and exit from the other port. In this embodiment, the fluid medium flows into the valve chamber 120 from the first port 130 and out from the second port 140.
Referring to fig. 1, 2 and 5, the guide sleeve 300 is disposed in the valve cavity 120 and is located below the connecting seat 200, and the guide sleeve 300 is connected to the connecting seat 200, where the guide sleeve 300 may be fixedly connected to the connecting seat 200 or movably connected to the connecting seat 200, and the connection manner of the guide sleeve 300 may be various, such as riveting, welding, clamping, or the like, or may be connected through a connection structure or sealed connection through a sealing structure, which is not limited in particular. The diameter of the connecting seat 200 is larger, the diameter of the guide sleeve 300 is smaller, the guide sleeve 300 and the guide sleeve are arranged in a split mode, and the guide sleeve 300 and the connecting seat 200 are connected together. Compared with the traditional scheme of integrally arranging the guide sleeve 300 and the connecting seat 200, the technical scheme of the application has the advantages that when the guide sleeve 300 and the connecting seat 200 are respectively processed, the processing allowance is small, the processing time is short, and the production efficiency can be improved; meanwhile, the processing allowance is small, the loss of raw materials can be further reduced, and the cost is reduced; further, when the guide sleeve 300 and the connection seat 200 are respectively processed, the abrasion degree of the cutter is also small, the cutter does not need to be frequently replaced, the service life of the cutter is prolonged, and the cost is further reduced. Still further, a passage 800 is formed between the nut assembly 600, the needle assembly 500, and the coupling seat 200, the first balancing hole 521 may communicate the passage 800 with the inner space of the valve head 520, the second balancing hole 610 may communicate the passage 800 with the receiving chamber 710, and a balancing passage 800 is formed between the first balancing hole 521 and the second balancing hole 610. Through the balancing passage 800, two areas of the accommodating cavity 710 and the valve cavity 120 are communicated, so that pressure balance of the two side chambers of the valve head 520 in the axial direction is ensured, and the action performance of the valve needle assembly 500 and the performance of the electronic expansion valve 10 are prevented from being influenced due to uneven pressure of the accommodating cavity 710 and the valve cavity 120.
Referring to fig. 1 to 3, the lower end surface of the guide sleeve 300 divides the valve cavity 120 into a first valve cavity 121 and a second valve cavity 122, the guide sleeve 300 has a medium circulation cavity 340 and a mounting port 350 therein, the medium circulation cavity 340 is communicated with the first valve cavity 121, and the first valve cavity 121 is communicated with the first connector 130. The valve seat 400 is installed at the installation port 350 and is in sealing connection with the guide sleeve 300, the valve seat 400 is provided with a valve port 410, the valve port 410 is communicated with the second valve cavity 122, the second valve cavity 122 is communicated with the second interface 140, and the medium circulation cavity 340 can be communicated with the valve port 410. When the electronic expansion valve 10 is in operation, fluid medium will first enter the first valve chamber 121 from the first port 130, then enter the medium flow chamber 340 through the first valve chamber 121, then flow out of the valve port 410 to the second valve chamber 122 in the medium flow chamber 340, and finally flow out through the second port 140.
Referring to fig. 1, the electronic expansion valve 10 further includes a valve needle assembly 500, where the valve needle assembly 500 is movably disposed in the guide sleeve 300 and can move along the axial direction of the guide sleeve 300, the guide sleeve 300 mainly guides the movement of the valve needle assembly 500, and the valve needle assembly 500 can open or close the valve port 410 to control the flow of the fluid medium in the electronic expansion valve 10 and the flow rate. Specifically, valve needle assembly 500 includes a valve stem 510 and a valve head 520 coupled to valve stem 510, valve port 410 being in communication with second interface 140, valve port 410 being configured for insertion of valve head 520 of valve needle assembly 500, thereby blocking fluid medium within electronic expansion valve 10 from exiting through valve port 410. When the valve head 520 of the valve needle assembly 500 closes the valve port 410, i.e., the medium flow chamber 340 and the valve port 410 are disconnected, the electronic expansion valve 10 is closed, and fluid medium cannot flow from the first port 130 to the second port 140; when the valve head 520 of the valve needle assembly 500 releases the seal against the valve port 410, i.e., the medium flow chamber 340 and the valve port 410 communicate with each other, the electronic expansion valve 10 opens, at which time fluid medium may flow from the first port 130 to the second port 140. The inner wall of the valve port 410 forms a flow adjusting surface, the flow adjusting surface extends obliquely downwards, the valve head 520 is in a cylindrical shape, when the valve head 520 is abutted against the flow adjusting surface, the valve head 520 completely closes the valve port 410, when the valve head 520 moves upwards, a gap exists between the valve head 520 and the flow adjusting surface, the gap is continuously enlarged along with the upward movement of the valve head 520, a fluid medium flows through the valve port 410 and flows out from the gap, and the valve head 520 controls the flow of the fluid medium in the electronic expansion valve 10 by controlling the size of the gap between the valve head 520 and the flow adjusting surface.
It should be emphasized here that the valve seat 400 is in sealing connection with the guide sleeve 300, so that when the valve head 520 closes the valve port 410, fluid medium can be prevented from flowing out from a gap between the valve seat 400 and the guide sleeve 300, so that the possibility of internal leakage of the electronic expansion valve 10 is reduced, and further, the valve head 520 and the valve seat 400 can be made of different materials, so that the tightness between the valve head 520 and the valve port 410 is improved, and the possibility of internal leakage of the electronic expansion valve 10 is further reduced.
It will be appreciated that the valve housing is disposed around the nut assembly 600 and the valve needle assembly 500, and is generally cylindrical in design, and the valve housing and the connecting seat 200 may be fixed by welding. The inside of valve casing is formed with and holds the chamber 710, holds the intracavity and still holds rotor subassembly 1100, nut subassembly 600 has the nut, the nut with the valve rod 510 threaded connection of valve needle subassembly 500, rotor subassembly 1100 with valve rod 510 is connected, because form the screw-thread fit relation of nut valve rod 510 between nut and the valve rod 510, rotor subassembly 1100 rotates and can drive valve rod 510 and rotate, and then makes valve rod 510 follow the axis direction of valve port 410 and stretches out and draws back the motion, realizes the motion process that valve rod 510 drove valve head 520 and removed, in order to open or close valve port 410.
Referring to fig. 1 and 2, the valve head 520 is provided with a first balancing hole 521, and the first balancing hole 521 can communicate the inner space of the valve head 520 with the outer space, i.e., the first balancing hole 521 can balance the pressure inside and outside the valve head 520. The nut assembly 600, the valve needle assembly 500 and the connection seat 200 are formed with a passage 800 therebetween, specifically, the nut assembly 600 includes a nut, the lower end of the nut is sleeved on the upper end of the valve head 520, and the nut is connected with the connection seat 200, the passage 800 is formed between the nut, the connection seat 200 and the valve head 520, the nut assembly 600 is provided with a second balance hole 610, the second balance hole 610 can communicate the passage 800 with the receiving chamber 710, that is, the second balance hole 610 can balance the pressure of the upper end and the lower end of the nut assembly 600. The accommodating cavity 710 can be communicated with the second cavity through the second balance hole 610, the channel 800, the first balance hole 521, the inner space of the valve head 520 and the valve port 410 in sequence, and when the valve needle assembly 500 moves up and down, the pressure in the upper and lower spaces of the electronic expansion valve 10 is balanced, so that the valve opening action performance of the electronic expansion valve 10 is improved, the valve opening action voltage of the electronic expansion valve 10 is reduced, the miniaturization and the light weight are realized, the requirement on coil driving force is reduced, the cost of coil and rotor materials is reduced, and the production cost of the electronic expansion valve 10 is reduced.
The electronic expansion valve 10 of the present invention includes a valve seat 100, a connection seat 200, a guide sleeve 300, a valve port seat 400, a needle assembly 500, a nut assembly 600, and a valve housing 700. According to the electronic expansion valve 10, the connecting seat 200 and the guide sleeve 300 are arranged in a split mode, so that when the guide sleeve 300 and the connecting seat 200 are respectively processed, the processing allowance is small, the processing time is short, and the production efficiency can be improved; meanwhile, the processing allowance is small, the loss of raw materials can be further reduced, and the cost is reduced; further, when the guide sleeve 300 and the connection seat 200 are respectively processed, the abrasion degree of the cutter is also small, the cutter does not need to be frequently replaced, the service life of the cutter is prolonged, and the cost is further reduced. Furthermore, a balancing channel 800 is further provided in the electronic expansion valve 10 to ensure the pressure balance in the electronic expansion valve 10, so as to reduce the material requirements for the coil and the rotor, thereby further reducing the production cost of the electronic expansion valve 10.
Referring to fig. 1 and 4, in an embodiment, the connection base 200 has a first through hole 210 and a second through hole 220 communicating with the first through hole 210, and the guide sleeve 300 includes a mounting portion 310, and the mounting portion 310 extends into the second through hole 220 and is connected to the connection base 200. Specifically, the mounting portion 310 extends into the second through hole 220, the outer wall surface of the mounting portion 310 abuts against the inner wall surface of the second through hole 220, and a part of the outer surface of the mounting portion 310 abuts against the lower end of the connecting seat 200, so that the connection stability between the mounting seat and the guiding sleeve 300 is improved by increasing the contact area between the guiding sleeve 300 and the connecting seat 200.
Referring to fig. 6, there are various connection methods for connecting the guide sleeve 300 and the connection base 200. In one embodiment, the guide sleeve 300 is welded to the connector holder 200. Specifically, when the guide sleeve 300 and the connecting seat 200 are made of metal materials, the guide sleeve 300 and the connecting seat 200 can be welded together and connected in a welding manner, so that the connection stability of the guide sleeve 300 and the connecting seat 200 is further enhanced.
Referring to fig. 7 and 8, in another embodiment, the guide sleeve 300 is riveted with the connection seat 200. Specifically, the guide sleeve 300 and the connecting seat 200 may be further connected by riveting, the deformation of the connection between the guide sleeve 300 and the connecting seat 200 after riveting is small, the requirement of the riveting on the environment is low, and the riveted parts are not easy to loosen. When the guide sleeve 300 is welded to the connection base 200, the connection base 200 and the guide sleeve 300 are assembled together by an assembling device, and then welded together by a welding device, so that the whole process needs two devices. Compared with the welding mode, the guide sleeve 300 and the connecting seat 200 are connected in a riveting mode, the process is few, the operation can be finished through one piece of equipment, the time is short, and the production efficiency of the electronic expansion valve 10 can be improved.
Further, the guide sleeve 300 is connected with the connecting seat 200 in a riveting manner, at this time, the connecting seat 200 is made of stainless steel, the guide sleeve 300 can be made of aluminum alloy, and the aluminum alloy has the advantages of light weight and high strength, good sealing performance, corrosion resistance and relatively low cost. The use of the guide bush 300 made of aluminum alloy can realize weight reduction, and can further reduce the production cost of the electronic expansion valve 10.
Of course, the guide sleeve 300 and the connection seat 200 may be connected by a clamping connection or other connection methods, which is not particularly limited.
Referring to fig. 4 and 5, in an embodiment, the guide sleeve 300 further includes a guide portion 320, the guide portion 320 is connected to the mounting portion 310, a riveting surface 211 is formed on a lower end surface of the first through hole 210, and the guide portion 320 extends into the second through hole 220 and abuts against the riveting surface 211 through self deformation. Specifically, the diameter of the first through hole 210 is larger than that of the second through hole 220, when the guide sleeve 300 is riveted with the connecting seat 200, a riveting surface 211 is formed at the connection position between the first through hole 210 and the second through hole 220 (i.e. the lower end surface of the first through hole 210), the guide portion 320 is connected with the end of the mounting portion 310 near the port 110, the guide portion 320 extends into the second through hole 220 and extends into the first through hole 210, and then the guide portion 320 is deformed by the riveting device to abut against the riveting surface 211, so as to fixedly connect the guide sleeve 300 with the connecting seat 200.
Referring to fig. 4 and 5, in an embodiment, the guide sleeve 300 further includes a body portion 330, the body portion 330 is connected to the mounting portion 310, an upper end surface of the body portion 330 forms a first limiting portion 331, and the first limiting portion 331 abuts against a lower end surface of the connection seat 200. Specifically, the first limiting portion 331 may limit the upper end of the guide sleeve 300, so as to fix the guide sleeve 300, and avoid the mounting portion 310 of the guide sleeve 300 from being excessively press-fitted into the second through hole 220.
In one embodiment, the number of the first balancing holes 521 is greater than or equal to 1, and/or the number of the second balancing holes 610 is greater than or equal to 1. It is to be understood that the number of the first balancing holes 521 is at least one, but may be plural. The number of the second balance holes 610 may be at least one, or may be a plurality of, and the number of the first balance holes 521 and the second balance holes 610 may be the same or different. The number of the first balancing holes 521 and the second balancing holes 610 and the aperture are not particularly limited in this embodiment, and the electronic expansion valve 10 of different specifications may be selected according to actual needs.
Referring to fig. 4 to 7, in an embodiment, the connection base 200 includes a positioning section 230 and an extension section 240, the positioning section 230 is connected to the extension section 240, the positioning section 230 has external threads, the inner wall surface of the port 110 has internal threads, and the positioning section 230 is connected to the inner wall surface of the port 110 by threads. Specifically, for the convenience of the disassembly and assembly of the connecting seat 200 and the valve seat 100, the port 110 of the valve seat 100 may be provided with an internal thread, and the positioning section 230 of the connecting seat 200 may be provided with an external thread, which are in threaded fit connection, so as to facilitate the disassembly and assembly.
Further, the outer wall surface of the extension section 240 is provided with a groove 241, and the electronic expansion valve 10 further includes a sealing member 900, where the sealing member 900 is disposed in the groove 241 and abuts against the inner wall surface of the valve seat 100. Specifically, the sealing member 900 may be a rubber ring, the rubber ring has elasticity, the rubber ring is placed in the groove 241, and the groove 241 may perform a better limiting function on the sealing member 900. The seal 900 is assembled by interference fit, and after the assembly is completed, the seal 900 is deformed and tightly abuts against the inner wall surface of the port 110 of the valve seat 100, so that the connection seat 200 is in sealing connection with the valve seat 100, and the connection tightness of the connection seat 200 and the valve seat 100 is improved. Of course, the groove 241 may be formed on the inner wall surface of the port 110 of the valve seat 100, so that the sealing member 900 abuts against the outer wall surface of the extension 240, and the forming position of the groove 241 is not particularly limited.
Referring to fig. 6 or 7, in an embodiment, the maximum diameter of the connecting seat 200 is D1, and the maximum diameter of the guide sleeve 300 is D2, where D1 > D2. Specifically, the maximum diameter of the connecting seat 200 of the electronic expansion valve 10 is larger than the maximum diameter of the guide sleeve 300, so when the connecting seat 200 and the guide sleeve 300 are processed, the processing should be performed respectively, compared with the traditional scheme of integrally arranging the guide sleeve 300 and the connecting seat 200, the technical scheme of the application has the advantages that when the guide sleeve 300 and the connecting seat 200 are processed respectively, the processing allowance is small, the processing time is short, and the production efficiency can be improved; meanwhile, the processing allowance is small, the loss of raw materials can be further reduced, and the cost is reduced; further, when the guide sleeve 300 and the connection seat 200 are respectively processed, the abrasion degree of the cutter is also small, the cutter does not need to be frequently replaced, the service life of the cutter is prolonged, and the cost is further reduced.
Referring to fig. 1 and 5, in an embodiment, the electronic expansion valve 10 further includes a gasket 1200, and the gasket 1200 is connected to the guide sleeve 300 and abuts against the lower end of the valve port seat 400. Specifically, a gasket 1200 may be further disposed at the lower end of the valve seat 400, where the upper end of the gasket 1200 abuts against the lower end of the valve seat 400, and the gasket 1200 is fixedly connected with the guide sleeve 300, so as to support the valve seat 400. The gasket 1200 should be provided with an opening corresponding to the valve port 410 of the valve port seat 400 for fluid medium to circulate. The connection between the gasket 1200 and the guide sleeve 300 may be by riveting or welding, which is not particularly limited.
Referring to fig. 1 and 2, in an embodiment, the electronic expansion valve 10 further includes a connecting piece 1000, the connecting piece 1000 is disposed at a connection position between the nut assembly 600 and the connection seat 200, and a through hole 1010 corresponding to the second balance hole 610 is formed in the connecting piece 1000. Specifically, the connection piece 1000 may cover the connection between the nut assembly 600 and the connection socket 200 to further improve the tightness of the connection between the nut assembly 600 and the connection socket 200. The connecting piece 1000 and the nut assembly 600 may be embedded into the outer circumferential surface of the nut assembly 600 to realize the clamping and fixing of the two, and may be fixed with the nut assembly 600 by welding, so as to better ensure the stability of the connection between the two. The connecting piece 1000 is in a circular ring shape, and in other embodiments, the connecting piece 1000 may be a plurality of spacers and arranged on the outer peripheral surface of the nut assembly 600 at intervals. Since the connecting piece 1000 covers the connection portion between the nut assembly 600 and the connection socket 200, in order not to affect the communication between the channel 800 and the receiving cavity 710, the connecting piece 1000 is further provided with a through hole 1010 corresponding to the second balancing hole 610, and in order to ensure the pressure balancing effect on both sides of the connection socket 200 in the axial direction, the aperture of the through hole 1010 should not be smaller than the aperture of the second balancing hole 610.
Referring to fig. 1 and 3, in an embodiment, the valve seat 100 further has a first port 130 and a second port 140, the guide sleeve 300 has a medium circulation cavity 340, the first port 130 communicates with the first valve cavity 121, the first valve cavity 121 communicates with the medium circulation cavity 340, the valve port 410 communicates with the second valve cavity 122, and the second valve cavity 122 communicates with the second port 140; when the valve head 520 opens the valve port 410, the first port 130 and the second port 140 communicate.
Specifically, when the electronic expansion valve 10 is operated and the valve head 520 opens the valve port 410, the fluid medium enters the first valve cavity 121 from the first port 130, then enters the medium circulation cavity 340 through the first valve cavity 121, then flows out from the valve port 410 to the second valve cavity 122 in the medium circulation cavity 340, and finally flows out through the second port 140. The fluid medium may flow into one of the first port 130 and the second port 140 and flow out of the other port, which is not particularly limited.
The invention also proposes a refrigeration device comprising the electronic expansion valve 10 described above. The specific structure of the electronic expansion valve 10 refers to the above embodiments, and since the present refrigeration apparatus adopts all the technical solutions of all the embodiments, at least the technical solutions of the embodiments have all the beneficial effects, which are not described in detail herein. Wherein the refrigeration equipment is an air conditioner, a refrigerator or 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 (14)

1. An electronic expansion valve, characterized in that it comprises:
a valve seat, one end of which is provided with a port, and the valve seat is provided with a valve cavity communicated with the port;
the connecting seat is arranged at the port;
the guide sleeve is arranged in the valve cavity and connected with the connecting seat, and the lower end surface of the guide sleeve divides the valve cavity into a first valve cavity and a second valve cavity;
the valve port seat is arranged in the valve cavity and is provided with a valve port, and the first valve cavity and the second valve cavity can be communicated through the valve port;
the valve needle assembly is movably arranged on the guide sleeve and comprises a valve head, and the valve head is movably inserted into the valve port to open or close the valve port; the inner space of the valve head is communicated with the valve port, and the valve head is provided with a first balance hole;
the nut component is arranged on the connecting seat and is in threaded fit with the valve needle component, and the nut component is provided with a second balance hole; and
the valve shell is arranged on the connecting seat and sleeved outside the nut component and the valve needle component, and a containing cavity is formed in the valve shell;
the nut component, the valve needle component and the connecting seat are provided with a channel therebetween, the channel can be communicated with the inner space of the valve head through the first balance hole, and the channel can be communicated with the accommodating cavity through the second balance hole.
2. The electronic expansion valve of claim 1, wherein the connection base has a first through hole and a second through hole communicating with the first through hole, and the guide sleeve includes a mounting portion extending into the second through hole and connected to the connection base.
3. The electronic expansion valve of claim 2, wherein said guide sleeve is welded to said connector block.
4. The electronic expansion valve of claim 2, wherein said guide sleeve is riveted to said connector block.
5. The electronic expansion valve according to claim 4, wherein the guide sleeve further comprises a guide portion connected to the mounting portion, a lower end surface of the first through hole forms a caulking face, and the guide portion extends into the second through hole and abuts against the caulking face through self deformation.
6. The electronic expansion valve according to claim 2, wherein the guide sleeve further comprises a body portion, the body portion is connected with the mounting portion, an upper end face of the body portion forms a first limiting portion, and the first limiting portion abuts against a lower end face of the connecting seat.
7. The electronic expansion valve of claim 1, wherein the number of first balance holes is greater than or equal to 1 and/or the number of second balance holes is greater than or equal to 1.
8. The electronic expansion valve of any of claims 1 to 6, wherein said connector comprises a positioning segment and an extension segment, said positioning segment and said extension segment being connected, said positioning segment having external threads, said port having internal threads on an inner wall surface thereof, said positioning segment being threadably connected to said port inner wall surface.
9. The electronic expansion valve of claim 8, wherein the outer wall surface of the extension is provided with a groove, and the electronic expansion valve further comprises a sealing member disposed in the groove and abutting against the inner wall surface of the valve seat.
10. The electronic expansion valve of any of claims 1 to 6, wherein the maximum diameter of the connection seat is D1 and the maximum diameter of the guide sleeve is D2, D1 > D2.
11. The electronic expansion valve of any of claims 1 to 6, further comprising a connecting piece disposed at a connection between the nut assembly and the connecting seat, the connecting piece having a through hole formed therein corresponding to the second balance hole.
12. The electronic expansion valve of any of claims 1 to 6, wherein said valve seat further has a first port and a second port, said guide sleeve having a medium flow chamber, said first port in communication with said first valve chamber, said first valve chamber in communication with said medium flow chamber, said valve port in communication with said second valve chamber, said second valve chamber in communication with said second port; the first port and the second port communicate when the valve head opens the valve port.
13. A refrigeration device comprising an electronic expansion valve according to any one of claims 1 to 12.
14. The refrigeration appliance of claim 13 wherein the refrigeration appliance is an air conditioner, a freezer, a refrigerator or a heat pump water heater.
CN202210896201.9A 2022-07-27 2022-07-27 Electronic expansion valve and refrigeration equipment Pending CN117515198A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210896201.9A CN117515198A (en) 2022-07-27 2022-07-27 Electronic expansion valve and refrigeration equipment
PCT/CN2023/096408 WO2024021821A1 (en) 2022-07-27 2023-05-25 Electronic expansion valve and refrigeration apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210896201.9A CN117515198A (en) 2022-07-27 2022-07-27 Electronic expansion valve and refrigeration equipment

Publications (1)

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CN117515198A true CN117515198A (en) 2024-02-06

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WO (1) WO2024021821A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086808A (en) * 1990-12-07 1992-02-11 Cooper Industries, Inc. Balanced sleeve control choke
JP3909461B2 (en) * 1996-09-17 2007-04-25 Ｓｍｃ株式会社 Direct acting 2-port solenoid valve
CN106678382B (en) * 2016-12-13 2022-06-17 盾安环境技术有限公司 Electronic expansion valve of vehicle air conditioning system
CN109780224A (en) * 2017-11-13 2019-05-21 艾默生环境优化技术(苏州)有限公司 Electric expansion valve
CN216742910U (en) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 Electronic expansion valve
CN217784255U (en) * 2022-07-27 2022-11-11 广东威灵电机制造有限公司 Electronic expansion valve and refrigeration equipment

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