WO2024021821A1 - 电子膨胀阀及制冷设备 - Google Patents

电子膨胀阀及制冷设备 Download PDF

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Publication number
WO2024021821A1
WO2024021821A1 PCT/CN2023/096408 CN2023096408W WO2024021821A1 WO 2024021821 A1 WO2024021821 A1 WO 2024021821A1 CN 2023096408 W CN2023096408 W CN 2023096408W WO 2024021821 A1 WO2024021821 A1 WO 2024021821A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
electronic expansion
guide sleeve
port
expansion valve
Prior art date
Application number
PCT/CN2023/096408
Other languages
English (en)
French (fr)
Inventor
杨茂
陈超
任纬峰
Original Assignee
广东威灵电机制造有限公司
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 广东威灵电机制造有限公司 filed Critical 广东威灵电机制造有限公司
Publication of WO2024021821A1 publication Critical patent/WO2024021821A1/zh

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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

Definitions

  • the present application relates to the technical field of fluid control components, and in particular to an electronic expansion valve and refrigeration equipment.
  • an electronic expansion valve is an important component in the refrigeration system. It mainly plays the role of throttling, reducing pressure and regulating flow.
  • an electronic expansion valve includes a valve seat assembly, a nut assembly, a valve needle assembly, a magnetic rotor assembly and other components.
  • the valve seat assembly has a valve port. When the electronic expansion valve is working, it is driven by an energized coil surrounding the valve housing.
  • the magnetic rotor assembly rotates, thereby driving the valve needle assembly to move axially, thereby controlling the opening or closing of the valve port, thereby achieving the functions of throttling, reducing pressure and regulating flow.
  • the connecting seat and guide sleeve in the existing electronic expansion valve are usually set as an integrated structure, which simultaneously meets the connection with the valve body, shell, etc., and the guiding function of the valve needle.
  • the integrated connecting seat and guide sleeve are used in Bars are usually used for processing.
  • the diameter of the lower end of the bar after processing should be smaller than the diameter of the upper end. Therefore, when processing the lower end of the bar, the machining allowance is large, the processing time of the parts is long, and the wear of the tool is large, resulting in tool failure.
  • the service life of the electronic expansion valve is short, the tools need to be replaced frequently, and the production cost is high.
  • the electronic expansion valve requires a large driving force when working, which affects the materials of the coil and rotor. The requirements are higher, which further increases production costs.
  • the main purpose of this application is to propose an electronic expansion valve, aiming to solve at least one of the technical problems existing in the prior art.
  • an electronic expansion valve which includes:
  • valve seat with a port formed at one end, and the valve seat has a valve cavity connected to the port;
  • a connection base is provided at the port
  • a guide sleeve is provided in the valve cavity, the guide sleeve is connected to 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;
  • valve seat is provided in the valve chamber, the valve seat has a valve port, and the first valve chamber and the second valve chamber can be connected through the valve port;
  • a valve needle assembly is movably provided on the guide sleeve, the valve needle assembly includes a valve head, and the valve head is movably inserted into the valve port to open or close the valve port; the valve The internal space of the head is connected with the valve port, and the valve head is provided with a first balance hole;
  • a nut assembly is disposed on the connecting seat and is threadedly matched with the valve needle assembly, and the nut assembly is provided with a second balance hole;
  • a valve housing is provided on the connecting seat and is sleeved outside the nut assembly and the valve needle assembly.
  • An accommodation cavity is formed inside the valve housing;
  • a channel is formed between the nut assembly, the valve needle assembly and the connecting seat, the first balance hole can communicate the channel with the internal space of the valve head, and the second balance hole The channel can be connected to the receiving chamber.
  • connection base has a first through hole and a second through hole connected to the first through hole
  • guide sleeve includes a mounting portion, and the mounting portion extends into the second through hole. And connected with the connecting base.
  • the guide sleeve and the connecting seat are welded.
  • the guide sleeve and the connecting seat are riveted.
  • the guide sleeve further includes a guide portion, the guide portion is connected to the installation portion, the lower end surface of the first through hole forms a riveting surface, and the guide portion extends into the second through hole. hole and contacts the riveting surface through its own deformation.
  • the guide sleeve further includes a body part, the body part is connected to the mounting part, the upper end surface of the body part forms a first limiting part, and the first limiting part is connected to the mounting part.
  • the lower end surface of the connecting seat is in contact.
  • the number of the first balancing holes is greater than or equal to 1, and/or the number of the second balancing holes is greater than or equal to 1.
  • connection base includes a positioning section and an extension section.
  • the positioning section is connected to the extension section.
  • the positioning section has external threads.
  • the inner wall of the port has internal threads.
  • the positioning section It is threadedly connected to the inner wall surface of the port.
  • the outer wall surface of the extension section is provided with a groove
  • the electronic expansion valve further includes a sealing member, the sealing member is disposed in the groove and abuts against the inner wall surface of the valve seat.
  • the maximum diameter of the connecting seat is D1
  • the maximum diameter of the guide sleeve is D2, D1>D2.
  • the electronic expansion valve further includes a connecting piece, the connecting piece is provided at the connection between the nut assembly and the connecting seat, and the connecting piece is provided with a hole corresponding to the position of the second balance hole. of through holes.
  • the valve seat further has a first interface and a second interface
  • the guide sleeve has a medium flow chamber
  • the first interface is connected to the first valve chamber
  • the first valve chamber is connected to the first valve chamber.
  • the medium flow chamber is connected
  • the valve port is connected with the second valve chamber
  • the second valve chamber is connected with the second interface; when the valve head opens the valve port, the first The interface is connected to the second interface.
  • the electronic expansion valve includes:
  • valve seat with a port formed at one end, and the valve seat has a valve cavity connected to the port;
  • a connection base is provided at the port
  • a guide sleeve is provided in the valve cavity, the guide sleeve is connected to 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;
  • a valve seat is provided on the guide sleeve, the valve seat has a valve port, and the first valve chamber and the second valve chamber can be connected through the valve port;
  • a valve needle assembly is movably provided on the guide sleeve, the valve needle assembly includes a valve head, and the valve head is movably inserted into the valve port to open or close the valve port; the valve The internal space of the head is connected with the valve port, and the valve head is provided with a first balance hole;
  • a nut assembly is disposed on the connecting seat and is threadedly matched with the valve needle assembly, and the nut assembly is provided with a second balance hole;
  • a valve housing is provided on the connecting seat and is sleeved outside the nut assembly and the valve needle assembly.
  • An accommodation cavity is formed inside the valve housing;
  • a channel is formed between the nut assembly, the valve needle assembly and the connecting seat, the first balance hole can communicate the channel with the internal space of the valve head, and the second balance hole The channel can be connected to the receiving chamber.
  • the refrigeration equipment is an air conditioner, a freezer, a refrigerator or a heat pump water heater.
  • Figure 1 is a schematic structural diagram of an embodiment of the electronic expansion valve of the present application.
  • Figure 2 is an enlarged view of point A in Figure 1;
  • Figure 3 is a schematic structural diagram of the valve seat of the electronic expansion valve in Figure 1;
  • Figure 4 is a schematic structural diagram of the connecting seat of the electronic expansion valve in Figure 1;
  • Figure 5 is an exploded view of part of the structure of the electronic expansion valve in Figure 1;
  • Figure 6 is a schematic structural diagram of the welding of the connecting seat and the guide sleeve
  • Figure 7 is a schematic structural diagram of the riveting of the connecting seat and the guide sleeve
  • Figure 8 is an enlarged view of point B in Figure 7.
  • the electronic expansion valve is an important component in the refrigeration system and mainly plays the role of throttling, reducing pressure and regulating flow.
  • Existing electronic expansion valves include a valve seat, a nut assembly and a valve needle assembly threaded with the nut assembly.
  • the magnetic rotor assembly is used to drive the valve needle assembly to produce axial movement to adjust the opening of the valve port, thereby achieving medium flow control.
  • the electronic expansion valve of this application has the connecting seat and the guide sleeve set up separately. During processing, the two parts are processed separately, which reduces the processing margin, consumes less material, and reduces the production cost.
  • a balance channel is set inside the electronic expansion valve. It ensures the pressure balance inside the electronic expansion valve, thereby reducing the requirements for coil driving force and reducing the cost of coil and rotor materials.
  • the electronic expansion valve of the present application can be applied to the air conditioning system of a car.
  • the fluid medium flowing through the electronic expansion valve is the refrigerant used for heat and cold exchange in the air conditioning system.
  • the electronic expansion valve is installed at the evaporator inlet of the air conditioning system.
  • the electronic expansion valve serves as the dividing element between the high-pressure side and the low-pressure side of the air-conditioning system, throttling and depressurizing the high-pressure liquid refrigerant from the liquid storage dryer and other devices, thereby Adjust and control the amount of liquid refrigerant entering the evaporator so that the amount of liquid refrigerant can adapt to the requirements of the external refrigeration load.
  • the electronic expansion valve is applied to other types of refrigeration equipment.
  • the fluid medium flowing through the electronic expansion valve can also be other fluid media besides refrigerant, as long as the electronic expansion valve can achieve throttling and pressure reduction of the fluid medium. That’s it, there are no specific restrictions on this.
  • 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 on one end of the valve seat 100, and the valve seat 100 has a valve chamber 120 connected to the port 110; the connecting seat 200 is provided on the port 110; the guide sleeve 300 is provided on the port 110.
  • valve cavity 120, the guide sleeve 300 is connected to 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 Disposed in the valve chamber 120, the valve port seat 400 has a valve port 410.
  • the first valve chamber 121 and the second valve chamber 122 can be connected through the valve port 410;
  • the valve needle assembly 500 is movable.
  • the valve needle assembly 500 includes a valve head 520, the valve head 520 is movably inserted into the valve port 410 to open or close the valve port 410;
  • the internal space of the valve head 520 is connected with the valve port 410.
  • the valve head 520 is provided with a first balance hole 521; the nut assembly 600 is provided on the connecting seat 200 and is threaded with the valve needle assembly 500.
  • the nut assembly 600 is provided with a second balance hole 610; the valve housing 700 is provided on the connecting seat 200 and is sleeved outside the nut assembly 600 and the valve needle assembly 500.
  • a receiving cavity 710 is formed inside the valve housing 700; a channel 800 is formed between the nut assembly 600, the valve needle assembly 500 and the connecting seat 200, and the first balance hole 521 can connect the The channel 800 communicates with the internal space of the valve head 520 , and the second balance hole 610 can communicate the channel 800 with the accommodation cavity 710 .
  • valve seat 100 of the electronic expansion valve 10 can be a valve seat 100 specially used to install the guide sleeve 300, the connecting seat 200, the valve seat 400 and other electronic expansion valve components to form a separate electronic expansion valve. 10.
  • the valve seat 100 can also be the valve seat 100 of an integrated module.
  • the electronic expansion valve components such as the guide sleeve 300, the connecting seat 200, the valve seat 400 and other electronic expansion valve components of the present application can be installed on the valve seat 100 of the integrated module. , and other structural components.
  • the valve seat 100 can be made of stainless steel, aluminum, or other materials, and there is no specific limitation on this.
  • the shape of the valve seat 100 may be cylindrical, square or other special shapes.
  • a port 110 is formed on one end of the valve seat 100.
  • the port 110 is specifically a stepped hole.
  • the connecting seat 200 is fixedly installed in the stepped hole. To facilitate later disassembly and assembly, the connecting seat 200 can be connected to the stepped hole. inner wall threaded connection.
  • the valve seat 100 also has a valve chamber 120, which is connected with the port 110.
  • a first interface 130 and a second interface 140 can also be provided on the valve seat 100.
  • the first interface 130 and the second interface 140 is used to connect pipes.
  • the first interface 130 and the second interface 140 can be connected through the valve cavity 120, so that the fluid medium can enter from the first interface 130 and flow out from the second interface 140 through the valve cavity 120; conversely, the fluid medium can also It enters from the second interface 140 and flows out from the first interface 130 through the valve chamber 120.
  • the fluid medium can flow into the valve chamber 120 from any one of the first interface 130 or the second interface 140 and flow out from the other port.
  • the fluid medium flows into the valve chamber 120 from the first interface 130 and flows out from the second interface 140 .
  • the guide sleeve 300 is disposed in the valve chamber 120 and is located below the connecting seat 200.
  • the guide sleeve 300 is connected to the connecting seat 200, wherein the guide sleeve 300 can be connected to the connecting seat 200.
  • the connecting base 200 can be fixedly connected or can be movable connected with the connecting base 200.
  • the diameter of the connecting seat 200 of this application is larger, and the diameter of the guide sleeve 300 is smaller. The two are arranged separately, and the guide sleeve 300 and the connecting seat 200 are connected together.
  • the technical solution of the present application has a small machining allowance and a short processing time when the guide sleeve 300 and the connecting seat 200 are processed separately.
  • a passage 800 is formed between the nut assembly 600 , the valve needle assembly 500 and the connecting seat 200 , and the first balance hole 521 can connect the passage 800 to the inside of the valve head 520 Spatially connected, the second balance hole 610 can communicate the channel 800 with the accommodation cavity 710 , and a balance channel 800 is formed between the first balance hole 521 and the second balance hole 610 .
  • the balance channel 800 Through the balance channel 800, the two areas of the accommodation chamber 710 and the valve chamber 120 are connected, thereby ensuring the pressure balance of the chambers on both sides of the valve head 520 in the axial direction, and preventing the accommodation chamber 710 and the valve chamber 120 from colliding. Uneven pressure affects the operating performance of the valve needle assembly 500 and further affects the performance of the electronic expansion valve 10 .
  • 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 flow chamber 340 and an installation port. 350, the medium flow chamber 340 is connected with the first valve chamber 121, and the first valve chamber 121 is connected with the first interface 130.
  • the valve seat 400 is installed at the installation port 350 and is sealingly connected to the guide sleeve 300.
  • the valve seat 400 has a valve port 410.
  • the valve port 410 is connected to the second valve chamber 122, and the second valve chamber 122 is connected to the second interface 140.
  • the medium flow chamber 340 may be connected with the valve port 410 .
  • the fluid medium When the electronic expansion valve 10 is working, the fluid medium will first enter the first valve chamber 121 from the first interface 130, then enter the medium flow chamber 340 through the first valve chamber 121, and then exit from the valve in the medium flow chamber 340.
  • the port 410 flows out to the second valve chamber 122 and finally flows out through the second interface 140 .
  • the electronic expansion valve 10 also includes a valve needle assembly 500.
  • 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 It serves as a guide for the movement of the valve needle assembly 500 .
  • the valve needle assembly 500 can open or close the valve port 410 to control the circulation and flow rate of the fluid medium in the electronic expansion valve 10 .
  • the valve needle assembly 500 includes a valve stem 510 and a valve head 520 connected to the valve stem 510.
  • the valve port 410 is connected to the second interface 140, and the valve port 410 is used for the valve head 520 of the valve needle assembly 500 to be inserted, so that The fluid medium in the electronic expansion valve 10 is blocked from flowing out through the valve port 410 .
  • the valve head 520 of the valve needle assembly 500 closes the valve port 410, that is, when the medium flow chamber 340 and the valve port 410 are disconnected, the electronic expansion valve 10 is closed. At this time, the fluid medium cannot flow from the first interface 130 to the second interface 140. ;
  • the valve head 520 of the valve needle assembly 500 releases the seal on the valve port 410, that is, when the medium flow chamber 340 and the valve port 410 are connected to each other, the electronic expansion valve 10 is opened.
  • the fluid medium can flow from the first interface 130 to the third port.
  • the inner wall of the valve port 410 forms a flow adjustment surface, and the flow adjustment surface extends obliquely downward.
  • the valve head 520 is arranged in a cylindrical shape. When the valve head 520 contacts the flow adjustment surface, the valve head 520 The valve port 410 is completely closed. When the valve head 520 moves upward, there is a gap between the valve head 520 and the flow adjustment surface, and the gap will continue to increase as the valve head 520 moves upward, and the fluid medium will flow through the gap.
  • the valve head 520 controls the flow rate 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 adjustment surface.
  • valve seat 400 is sealed with the guide sleeve 300, which can prevent the fluid medium from flowing out from the gap between the valve seat 400 and the guide sleeve 300 when the valve head 520 closes the valve port 410, reducing the risk of The possibility of internal leakage in the electronic expansion valve 10.
  • valve head 520 and the valve port seat 400 can be made of different materials to improve the sealing between the two when the valve head 520 closes the valve port 410, further reducing the possibility of leakage in the electronic expansion valve 10. Possibility of leakage within the electronic expansion valve 10.
  • valve housing is sleeved outside the nut assembly 600 and the valve needle assembly 500.
  • the valve housing is generally cylindrical in design, and the valve housing and the connecting seat 200 can be fixed by welding.
  • An accommodating cavity 710 is formed inside the valve housing, and a rotor assembly 1100 is also accommodated in the accommodating cavity 710.
  • the nut assembly 600 has a nut, and the nut is threadedly connected to the valve stem 510 of the valve needle assembly 500.
  • the rotor assembly 1100 is connected to the valve stem 510.
  • the rotation of the rotor assembly 1100 can drive the valve stem 510 to rotate, thereby causing the valve stem 510 to move along the axis of the valve port 410.
  • the valve stem 510 makes a telescopic movement to drive the valve head 520 to move, thereby opening or closing the valve port 410 .
  • the valve head 520 is provided with a first balance hole 521.
  • the first balance hole 521 can connect the internal space of the valve head 520 with the external space. That is, the first balance hole 521 can balance the pressure inside and outside the valve head 520.
  • a channel 800 is formed between the nut assembly 600, the valve needle assembly 500 and the connecting seat 200.
  • 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 to the connecting seat 200.
  • the nut, A channel 800 is formed between the connecting seat 200 and the valve head 520.
  • the nut assembly 600 is provided with a second balancing hole 610.
  • the second balancing hole 610 can communicate the channel 800 with the accommodation cavity 710, that is, the second balancing hole 610 can balance the nut assembly 600.
  • the accommodation cavity 710 can be connected with the second cavity through the second balance hole 610, the channel 800, the first balance hole 521, the internal space of the valve head 520 and the valve port 410.
  • the valve needle assembly 500 moves up and down, the electronic expansion valve
  • the pressure in the upper and lower spaces of the electronic expansion valve 10 is kept balanced, thereby improving the valve opening performance of the electronic expansion valve 10, reducing the valve opening voltage of the electronic expansion valve 10, achieving miniaturization and weight reduction, and also reducing the impact on the coil driving force. requirements, achieving cost reduction of coil and rotor materials, thereby reducing the production cost of the electronic expansion valve 10.
  • the electronic expansion valve 10 of the present application 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.
  • the connecting seat 200 and the guide sleeve 300 are arranged separately.
  • the processing margin is small and the processing time is short, which can improve production efficiency.
  • the machining allowance is small, which can further reduce the loss of raw materials and reduce costs; further, when the guide sleeve 300 and the connecting seat 200 are processed separately, the degree of wear of the tool is also small, and frequent replacement is not required.
  • a balance channel 800 is provided in the electronic expansion valve 10 to ensure pressure balance within the electronic expansion valve 10 to reduce material requirements for the coil and rotor, thereby further reducing the production cost of the electronic expansion valve 10 .
  • connection base 200 has a first through hole 210 and a second through hole 220 connected with the first through hole 210 .
  • the guide sleeve 300 includes a mounting part. 310.
  • the mounting portion 310 extends into the second through hole 220 and is connected to the connecting base 200.
  • the mounting part 310 extends into the second through hole 220 , the outer wall surface of the mounting part 310 is in contact with the inner wall surface of the second through hole 220 , and part of the outer surface of the mounting part 310 is in contact with the connecting seat 200
  • the lower end of the mounting base abuts to increase the contact area between the guide sleeve 300 and the connecting seat 200 to improve the stability of the connection between the mounting base and the guide sleeve 300 .
  • connection methods for connecting the guide sleeve 300 and the connecting seat 200 there are multiple connection methods for connecting the guide sleeve 300 and the connecting seat 200.
  • the guide sleeve 300 and the connection base 200 are welded.
  • the guide sleeve 300 and the connecting seat 200 are both made of metal, the guide sleeve 300 and the connecting seat 200 can be welded together and connected by welding, which further enhances the connection between the guide sleeve 300 and the connecting seat 200 .
  • the stability of the 200-seat connection is provided.
  • the guide sleeve 300 and the connection base 200 are riveted.
  • the guide sleeve 300 and the connecting seat 200 can also be connected by riveting. After riveting, the deformation of the connection between the guide sleeve 300 and the connecting seat 200 is small, and the riveting method has low environmental requirements. The riveted parts are not easy to loosen.
  • the connection base 200 and the guide sleeve 300 are usually assembled together by assembly equipment, and then welded together by welding equipment. The whole process requires two machines. equipment to achieve.
  • the guide sleeve 300 and the connecting seat 200 are connected by riveting, which requires fewer processes and can be completed with only one piece of equipment and takes less time, which can improve the production efficiency of the electronic expansion valve 10 .
  • the guide sleeve 300 and the connecting seat 200 are connected by riveting.
  • the connecting seat 200 is made of stainless steel, and the guide sleeve 300 can be made of aluminum alloy.
  • the alloy material has the advantages of light weight, high strength, good sealing performance, corrosion resistance, and relatively low cost. Using the guide sleeve 300 made of aluminum alloy can achieve lightweighting and further reduce the production cost of the electronic expansion valve 10 .
  • guide sleeve 300 and the connecting seat 200 can also be connected through snapping or other connection methods, and there is no specific limitation on this.
  • the guide sleeve 300 further includes a guide portion 320.
  • the guide portion 320 is connected to the mounting portion 310.
  • the lower end surface of the first through hole 210 is riveted.
  • the guide portion 320 extends into the second through hole 220 and contacts the riveting surface 211 through its own deformation.
  • the diameter of the first through hole 210 is larger than the diameter of the second through hole 220.
  • a riveting surface 211 is formed at the connection point (ie, the lower end surface of the first through hole 210 ).
  • the guide portion 320 is connected to an end of the installation portion 310 close to the port 110 .
  • the guide portion 320 first extends into the second through hole 220 and extends to In the first through hole 210 , the guide part 320 is deformed by riveting equipment until it contacts the rivet surface 211 to firmly connect the guide sleeve 300 and the connection base 200 .
  • the guide sleeve 300 further includes a body portion 330.
  • the body portion 330 is connected to the mounting portion 310.
  • the upper end surface of the body portion 330 forms a first limit.
  • the first limiting portion 331 is in contact with the lower end surface of the connecting base 200 .
  • the first limiting portion 331 can limit the upper end of the guide sleeve 300 to achieve fixation of the guide sleeve 300 and prevent the mounting portion 310 of the guide sleeve 300 from being excessively pressed into the second through hole 220 .
  • 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 can be understood that the number of the first balancing hole 521 is at least one, or may be multiple; the number of the second balancing hole 610 is at least one, or may be multiple, and the first balancing hole 521 and the second balancing hole 610
  • the quantities can be the same or different.
  • the number and diameter of the first balancing holes 521 and the second balancing holes 610 are not specifically limited in this embodiment, and electronic expansion valves 10 of different specifications can be selected according to actual needs.
  • 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 an external thread.
  • the inner wall surface of the port 110 has internal threads, and the positioning section 230 is threadedly connected to the inner wall surface of the port 110 .
  • the port 110 of the valve seat 100 can be provided with internal threads, and the positioning section 230 of the connecting seat 200 can be provided with external threads.
  • the two threads are matched and connected for convenience. Disassembly and assembly.
  • the outer wall surface of the extension section 240 is provided with a groove 241.
  • the electronic expansion valve 10 further includes a seal 900.
  • the seal 900 is disposed in the groove 241 and is connected with the valve seat 100.
  • the inner wall surfaces are in contact.
  • the sealing member 900 can be a rubber ring, and the rubber ring is elastic.
  • the rubber ring is placed in the groove 241, and the groove 241 can play a better limiting role for the sealing member 900.
  • the seal 900 is assembled using an interference fit. After the assembly is completed, the seal 900 will deform and tightly contact the inner wall surface of the port 110 of the valve seat 100, so that the connecting seat 200 and the valve seat 100 are sealed. To improve the sealing performance of the connection between the connecting seat 200 and the valve seat 100.
  • the groove 241 can also be opened on the inner wall surface of the port 110 of the valve seat 100 so that the seal 900 contacts the outer wall surface of the extension section 240.
  • the position of the groove 241 is not specifically limited.
  • the maximum diameter of the connecting seat 200 is D1
  • the maximum diameter of the guide sleeve 300 is D2, D1>D2.
  • the maximum diameter of the connecting seat 200 of the electronic expansion valve 10 of the present application is larger than the maximum diameter of the guide sleeve 300. Therefore, when processing the connecting seat 200 and the guide sleeve 300, they should be processed separately. Compared with the traditional The technical solution of this application is to integrate the guide sleeve 300 and the connecting seat 200.
  • the processing margin is small and the processing time is short, which can improve production efficiency; at the same time , the machining allowance is small, which can further reduce the loss of raw materials and reduce costs; further, when the guide sleeve 300 and the connecting seat 200 are processed separately, the degree of wear of the cutting tools is also small, and there is no need to replace the cutting tools frequently. The service life of the tool is improved and the cost is further reduced.
  • the electronic expansion valve 10 further includes a gasket 1200.
  • the gasket 1200 is connected to the guide sleeve 300 and abuts against the lower end of the valve seat 400. .
  • a gasket 1200 can also be provided at the lower end of the valve seat 400.
  • the upper end of the gasket 1200 abuts the lower end of the valve seat 400.
  • the gasket 1200 is fixedly connected to the guide sleeve 300 and can support the valve seat 400. effect.
  • the gasket 1200 should be provided with an opening corresponding to the valve port 410 of the valve port seat 400 to allow fluid medium to flow.
  • the gasket 1200 and the guide sleeve 300 may be connected by riveting or welding, and there is no specific limitation on this.
  • the electronic expansion valve 10 further includes a connecting piece 1000.
  • the connecting piece 1000 is disposed at the connection between the nut assembly 600 and the connecting seat 200.
  • the connecting piece 1000 is provided with a through hole 1010 corresponding to the position of the second balancing hole 610 .
  • the connecting piece 1000 can cover the connection between the nut assembly 600 and the connecting base 200 to further improve the sealing performance of the connection between the nut assembly 600 and the connecting base 200 .
  • the connecting piece 1000 and the nut assembly 600 can be embedded in the outer peripheral surface of the nut assembly 600 to achieve snap-in fixation.
  • the connecting piece 1000 and the nut assembly 600 can be fixed by welding to better ensure the stability of the connection between the two. sex.
  • the connecting piece 1000 is arranged in an annular sheet shape.
  • the connecting piece 1000 can also be a plurality of partitions arranged at intervals on the outer peripheral surface of the nut assembly 600 . Since the connecting piece 1000 covers the connection between the nut assembly 600 and the connecting seat 200, in order not to affect the communication between the channel 800 and the accommodation cavity 710, the connecting piece 1000 is also provided with a through hole corresponding to the position of the second balancing hole 610. Hole 1010, in order to ensure the pressure balancing effect on both sides of the connecting seat 200 in the axial direction, the diameter of the through hole 1010 should not be smaller than the diameter of the second balance hole 610.
  • the valve seat 100 also has a first interface 130 and a second interface 140
  • the guide sleeve 300 has a medium flow chamber 340, the first interface 130 and the second interface 140.
  • the first valve chamber 121 is connected to the medium flow chamber 340
  • the valve port 410 is connected to the second valve chamber 122
  • the second valve chamber 122 is connected to the first valve chamber 122.
  • the two interfaces 140 are connected; when the valve head 520 opens the valve port 410, the first interface 130 and the second interface 140 are connected.
  • the first interface 130 and the second interface 140 are used to connect pipelines.
  • the fluid medium will first enter the first valve from the first interface 130.
  • the medium flow chamber 121 enters the medium flow chamber 340 through the first valve chamber 121 , then flows out from the valve port 410 to the second valve chamber 122 in the medium flow chamber 340 , and finally flows out through the second interface 140 .
  • the fluid medium can flow in from any one of the first port 130 or the second port 140 and flow out from the other port, and there is no specific limitation on this.
  • This application also proposes a refrigeration equipment, which includes the above-mentioned electronic expansion valve 10 .
  • the specific structure of the electronic expansion valve 10 refers to the above-mentioned embodiments. Since this refrigeration equipment adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be discussed here. Let’s go over them one by one.
  • the refrigeration equipment is an air conditioner, a freezer, a refrigerator or a heat pump water heater, etc.

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Abstract

一种电子膨胀阀（10），包括阀座（100）、连接座（200）、导向套（300）、阀口座（400）、阀针组件（500）、螺母组件（600）以及阀壳体（700），该电子膨胀阀通过将连接座和导向套分体设置，以降低对连接座和导向套的加工要求，加工余量小，对刀具的磨损程度小，且还可以减少材料的消耗，同时，电子膨胀阀内还设置有平衡通道（800），保证电子膨胀阀内的压力平衡，以降低对线圈和转子的材料要求。还公开了一种包括该电子膨胀阀的制冷设备。

Description

电子膨胀阀及制冷设备
本申请要求于2022年7月27日提交中国专利局、申请号为202210896201.9、发明名称为“电子膨胀阀及制冷设备”的中国专利申请的优先权，其全部内容通过引用结合在申请中。
技术领域
本申请涉及流体控制部件技术领域，特别涉及一种电子膨胀阀及制冷设备。
 背景技术
电子膨胀阀是制冷系统中的一个重要部件，主要起着节流降压和调节流量的作用。相关技术中，电子膨胀阀包括阀座组件、螺母组件、阀针组件和磁转子组件等部件，阀座组件开设有阀口，当电子膨胀阀工作时，通过环绕于阀壳体外的通电线圈驱动磁转子组件旋转，从而带动阀针组件轴向移动，进而控制阀口的开或关，以此来实现节流降压和调节流量的作用。现有的电子膨胀阀中的连接座和导向套通常设置为一体结构，其同时满足与阀体、壳体等的连接，以及对阀针的导向功能，一体设置的连接座和导向套，在加工时通常选用棒材进行加工。
 技术问题
受阀座内部结构限制，棒材加工后其下端的直径应当小于上端的直径，因此在加工棒材的下端时，加工余量大，零件加工的时间长，对刀具的磨损程度大，导致刀具的寿命低，需要经常更换刀具，生产成本较高，同时，由于电子膨胀阀内阀针组件的两端存在压力差，因此电子膨胀阀工作时需要较大的驱动力，对线圈和转子的材料要求较高，从而进一步增加了生产成本。
 技术解决方案
本申请的主要目的是提出一种电子膨胀阀，旨在至少解决现有技术中存在的技术问题之一。
为实现上述目的，本申请提出的电子膨胀阀，所述电子膨胀阀包括：
阀座，一端形成有端口，所述阀座具有与所述端口连通的阀腔；
连接座，设置于所述端口；
导向套，设置于所述阀腔，所述导向套与所述连接座连接，所述导向套的下端面将所述阀腔分为第一阀腔和第二阀腔；
阀口座，设置于所述阀腔，所述阀口座具有阀口，所述第一阀腔与所述第二阀腔可通过所述阀口连通；
阀针组件，可移动地设置于所述导向套，所述阀针组件包括阀头，所述阀头可移动地插设于所述阀口内，以打开或关闭所述阀口；所述阀头的内部空间与所述阀口连通，所述阀头设有第一平衡孔；
螺母组件，设置于所述连接座，并与所述阀针组件螺纹配合，所述螺母组件设有第二平衡孔；以及
阀壳体，设置于所述连接座，并套设在所述螺母组件与所述阀针组件外，所述阀壳体的内部形成有容纳腔；
其中，所述螺母组件、所述阀针组件及所述连接座之间形成有通道，所述第一平衡孔可将所述通道与所述阀头的内部空间连通，所述第二平衡孔可将所述通道与所述容纳腔连通。
在一实施例中，所述连接座具有第一通孔和与所述第一通孔连通的第二通孔，所述导向套包括安装部，所述安装部伸入所述第二通孔并与所述连接座连接。
在一实施例中，所述导向套与所述连接座焊接。
在一实施例中，所述导向套与所述连接座铆接。
在一实施例中，所述导向套还包括导向部，所述导向部与所述安装部连接，所述第一通孔的下端面形成铆接面，所述导向部伸入所述第二通孔并通过自身形变与所述铆接面抵接。
在一实施例中，所述导向套还包括本体部，所述本体部与所述安装部连接，所述本体部的上端面形成第一限位部，所述第一限位部与所述连接座的下端面抵接。
在一实施例中，所述第一平衡孔的数量大于或等于1，和/或所述第二平衡孔的数量大于或等于1。
在一实施例中，所述连接座包括定位段和延伸段，所述定位段和所述延伸段连接，所述定位段具有外螺纹，所述端口的内壁面具有内螺纹，所述定位段和所述端口的内壁面螺纹连接。
在一实施例中，所述延伸段的外壁面设置有凹槽，所述电子膨胀阀还包括密封件，所述密封件设置于所述凹槽，并与所述阀座的内壁面抵接。
在一实施例中，所述连接座的最大直径为D1，所述导向套的最大直径为D2，D1＞D2。
在一实施例中，所述电子膨胀阀还包括连接片，所述连接片设置于所述螺母组件和所述连接座的连接处，所述连接片上开设有与所述第二平衡孔位置对应的通孔。
在一实施例中，所述阀座还具有第一接口和第二接口，所述导向套具有介质流通腔，所述第一接口和所述第一阀腔连通，所述第一阀腔和所述介质流通腔连通，所述阀口与所述第二阀腔连通，所述第二阀腔和所述第二接口连通；当所述阀头打开所述阀口时，所述第一接口和所述第二接口连通。
本申请还提出一种制冷设备，所述制冷设备包括所述电子膨胀阀。所述电子膨胀阀包括：
阀座，一端形成有端口，所述阀座具有与所述端口连通的阀腔；
连接座，设置于所述端口；
导向套，设置于所述阀腔，所述导向套与所述连接座连接，所述导向套的下端面将所述阀腔分为第一阀腔和第二阀腔；
阀口座，设置于所述导向套，所述阀口座具有阀口，所述第一阀腔与所述第二阀腔可通过所述阀口连通；
阀针组件，可移动地设置于所述导向套，所述阀针组件包括阀头，所述阀头可移动地插设于所述阀口内，以打开或关闭所述阀口；所述阀头的内部空间与所述阀口连通，所述阀头设有第一平衡孔；
螺母组件，设置于所述连接座，并与所述阀针组件螺纹配合，所述螺母组件设有第二平衡孔；以及
阀壳体，设置于所述连接座，并套设在所述螺母组件与所述阀针组件外，所述阀壳体的内部形成有容纳腔；
其中，所述螺母组件、所述阀针组件及所述连接座之间形成有通道，所述第一平衡孔可将所述通道与所述阀头的内部空间连通，所述第二平衡孔可将所述通道与所述容纳腔连通。
在一实施例中，所述制冷设备为空调器、冷冻机、冰箱或热泵热水器。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请电子膨胀阀一实施例的结构示意图；
图2为图1中A处的放大图；
图3为图1中电子膨胀阀的阀座的结构示意图；
图4为图1中电子膨胀阀的连接座的结构示意图；
图5为图1中电子膨胀阀的部分结构的爆炸图；
图6为连接座和导向套焊接的结构示意图；
图7为连接座和导向套铆接的结构示意图；
图8为图7中B处的放大图。
附图标号说明：
标号 名称 标号 名称
10 电子膨胀阀 331 第一限位部
100 阀座 340 介质流通腔
110 端口 350 安装口
120 阀腔 400 阀口座
121 第一阀腔 410 阀口
122 第二阀腔 500 阀针组件
130 第一接口 510 阀杆
140 第二接口 520 阀头
200 连接座 521 第一平衡孔
210 第一通孔 600 螺母组件
211 铆接面 610 第二平衡孔
220 第二通孔 700 阀壳体
230 定位段 710 容纳腔
240 延伸段 800 通道
241 凹槽 900 密封件
300 导向套 1000 连接片
310 安装部 1010 通孔
320 导向部 1100 转子组件
330 本体部 1200 垫片
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示（诸如上、下、左、右、前、后……），则该方向性指示仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，若全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B”为例，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
本申请提出一种电子膨胀阀的实施例，电子膨胀阀是制冷系统中的一个重要部件，主要起着节流降压和调节流量的作用。现有电子膨胀阀包括阀座、螺母组件和与螺母组件螺纹配合的阀针组件，利用磁转子组件驱动阀针组件产生轴向运动，调节阀口的开度，从而实现介质的流通控制。本申请的电子膨胀阀，将连接座和导向套分体设置，在加工时两个零件单独加工，降低加工余量，消耗材料少，降低了生产成本，同时在电子膨胀阀内部设置平衡通道，保证电子膨胀阀内部的压力平衡，进而降低对线圈驱动力的要求，实现对线圈和转子材料的降本。
本申请的电子膨胀阀，可以应用到汽车的空调系统中，流经电子膨胀阀的流体介质为空调系统中用以进行冷热交换的冷媒。此时，电子膨胀阀安装于空调系统的蒸发器入口处，电子膨胀阀作为空调系统高压侧与低压侧的分界元件，将来自贮液干燥器等器件中的高压液态冷媒节流降压，从而调节和控制进入蒸发器中的液态冷媒的剂量，使得液态冷媒的剂量能够适应外界制冷负载的要求。或者，电子膨胀阀应用到其他类型的制冷设备中，流经电子膨胀阀的流体介质还可以是除冷媒之外的其他流体介质，只要电子膨胀阀能够实现对该种流体介质的节流降压即可，对此不作具体限制。
请参阅图1至图8，在本申请的一实施例中，所述电子膨胀阀10包括阀座100、连接座200、导向套300、阀口座400、阀针组件500、螺母组件600以及阀壳体700。所述阀座100的一端形成有端口110，所述阀座100具有与所述端口110连通的阀腔120；所述连接座200设置于所述端口110；所述导向套300设置于所述阀腔120，所述导向套300与所述连接座200连接，所述导向套300的下端面将所述阀腔120分为第一阀腔121和第二阀腔122，所述阀口座400设置于所述阀腔120，所述阀口座400具有阀口410，所述第一阀腔121与所述第二阀腔122可通过所述阀口410连通；所述阀针组件500可移动地设置于所述导向套300，所述阀针组件500包括阀头520，所述阀头520可移动地插设于所述阀口410内，以打开或关闭所述阀口410；所述阀头520的内部空间与所述阀口410连通，所述阀头520设有第一平衡孔521；所述螺母组件600，设置于所述连接座200，并与所述阀针组件500螺纹配合，所述螺母组件600设有第二平衡孔610；所述阀壳体700，设置于所述连接座200，并套设在所述螺母组件600与所述阀针组件500外，所述阀壳体700的内部形成有容纳腔710；其中，所述螺母组件600、所述阀针组件500及所述连接座200之间形成有通道800，所述第一平衡孔521可将所述通道800与所述阀头520的内部空间连通，所述第二平衡孔610可将所述通道800与所述容纳腔710连通。
需要强调的是，所述电子膨胀阀10的阀座100可以是专门用来安装导向套300、连接座200、阀口座400等电子膨胀阀组件的阀座100，以组成一个单独的电子膨胀阀10，或者，该阀座100还可以是集成化模块的阀座100，所述集成化模块的阀座100上可以安装本申请的导向套300、连接座200、阀口座400等电子膨胀阀组件，以及其他结构的组件。所述阀座100可以由不锈钢材质加工制造，也可以由铝材质加工制造，或者采用其他材质加工制造，对此不作具体限制。所述阀座100的形状可以呈圆柱形、方形或其他异形设置。所述阀座100的一端形成有端口110，所述端口110具体为一台阶孔，连接座200固定安装在台阶孔内，为便于后期的拆装，所述连接座200可以和所述台阶孔的内壁螺纹连接。所述阀座100内还具有阀腔120，所述阀腔120与端口110连通，在阀座100上还可以设置第一接口130和第二接口140，所述第一接口130和第二接口140用来连接管道，第一接口130和第二接口140可通过阀腔120连通，使得流体介质可以从第一接口130进入，经过阀腔120从第二接口140流出；反之，流体介质也可以从第二接口140进入，经过阀腔120从第一接口130流出，即流体介质可从第一接口130或第二接口140中的任意一个口流入到阀腔120中，并从另一个口流出。在本实施例中，流体介质从第一接口130流入到阀腔120中，并从第二接口140流出。
请参阅图1、图2和图5，导向套300设置于所述阀腔120，并位于连接座200的下方，所述导向套300与所述连接座200连接，其中，导向套300可以与连接座200可以是固定连接，也可以与连接座200活动连接，其连接方式有很多种，可以是铆接、焊接、卡接等，也可以是通过连接结构连接，或者通过密封结构密封连接，对此不作具体限制。本申请的连接座200的直径较大，导向套300的直径较小，将两者分体设置，并将导向套300和连接座200连接在一起。相比于传统的将导向套300和连接座200一体设置的方案，本申请的技术方案，在对导向套300和连接座200分别进行加工时，加工余量小，且加工的时间短，可以提高生产效率；同时，加工余量小，也可以进一步的减少原材料的损耗，降低成本；进一步地，在对导向套300和连接座200分别进行加工时，对刀具的磨损程度也较小，不需要经常更换刀具，提高了刀具的使用寿命，进一步降低了成本。更进一步地，所述螺母组件600、所述阀针组件500及所述连接座200之间形成有通道800，所述第一平衡孔521可将所述通道800与所述阀头520的内部空间连通，所述第二平衡孔610可将所述通道800与所述容纳腔710连通，所述第一平衡孔521和所述第二平衡孔610之间形成平衡通道800。通过该平衡通道800，以使得容纳腔710和阀腔120两个区域连通，从而保证了阀头520在轴向方向上的两侧腔室的压力平衡，防止了容纳腔710和阀腔120的压力不均而影响阀针组件500的动作性能，进而影响电子膨胀阀10的性能。
请参阅图1至图3，所述导向套300的下端面将所述阀腔120分为第一阀腔121和第二阀腔122，所述导向套300内具有介质流通腔340和安装口350，该介质流通腔340与第一阀腔121连通，第一阀腔121与第一接口130连通。阀口座400安装在安装口350处，并与导向套300密封连接，该阀口座400具有阀口410，阀口410与第二阀腔122连通，第二阀腔122与第二接口140连通，所述介质流通腔340可以与所述阀口410连通。当电子膨胀阀10工作时，流体介质会先从第一接口130进入到第一阀腔121中，然后通过第一阀腔121进入到介质流通腔340中，然后在介质流通腔340中从阀口410流出至第二阀腔122，并最后通过第二接口140流出。
请参阅图1，所述电子膨胀阀10还包括阀针组件500，阀针组件500可移动地设置在导向套300中，并可以沿所述导向套300的轴向进行移动，导向套300主要为阀针组件500的移动起导向作用，该阀针组件500可以打开或关闭阀口410，以控制流体介质在电子膨胀阀10中的流通以及流量大小。具体来说，阀针组件500包括阀杆510和与阀杆510连接的阀头520，阀口410与第二接口140连通，阀口410用以供阀针组件500的阀头520插入，从而阻断电子膨胀阀10内的流体介质通过阀口410流出。当阀针组件500的阀头520封闭阀口410，也即介质流通腔340和阀口410断开连通时，电子膨胀阀10关闭，此时流体介质不能从第一接口130流向第二接口140；当阀针组件500的阀头520解除对阀口410的密封，也即介质流通腔340和阀口410相互连通时，电子膨胀阀10打开，此时流体介质可以从第一接口130流向第二接口140。其中，所述阀口410的内壁形成流量调节面，所述流量调节面向下倾斜延伸，所述阀头520的形状呈圆柱形设置，当阀头520与流量调节面抵接时，阀头520完全封闭阀口410，当阀头520向上移动时，阀头520与流量调节面之间存在间隙，且该间隙随着阀头520的上移会不断加大，流体介质会从该间隙流过阀口410并流出，所述阀头520通过控制阀头520与流量调节面之间间隙的大小，以此来起到对电子膨胀阀10中的流体介质的流量大小的控制作用。
在此需要强调的是，所述阀口座400与所述导向套300密封连接，可以防止阀头520关闭阀口410时，流体介质从阀口座400与导向套300之间的缝隙流出，降低了电子膨胀阀10内泄漏的可能性，进一步地，所述阀头520和所述阀口座400可以设置为不同材质，以提高阀头520关闭阀口410时两者之间的密封性，进一步降低电子膨胀阀10内泄漏的可能性。
可以理解的是，阀壳套设在螺母组件600与阀针组件500外，所述阀壳大致呈圆柱形设计，阀壳与连接座200可以通过焊接的方式进行固定。阀壳的内部形成有容纳腔710，容纳腔710内还容纳有转子组件1100，所述螺母组件600具有螺母，所述螺母与所述阀针组件500的阀杆510螺纹连接，所述转子组件1100与所述阀杆510连接，由于螺母与阀杆510之间形成螺母阀杆510的螺纹配合关系，转子组件1100转动可以带动阀杆510转动，进而使得阀杆510沿阀口410的轴线方向做伸缩运动，实现阀杆510带动阀头520移动的运动过程，以此来打开或关闭所述阀口410。
请参阅图1和图2，阀头520设有第一平衡孔521，第一平衡孔521可将阀头520的内部空间与外部空间连通，即第一平衡孔521可平衡阀头520内外压力。螺母组件600、阀针组件500及连接座200之间形成有通道800，具体地，螺母组件600包括螺母，螺母的下端套设于阀头520的上端，且螺母与连接座200连接，螺母、连接座200和阀头520之间形成通道800，螺母组件600设有第二平衡孔610，第二平衡孔610可将通道800与容纳腔710连通，即第二平衡孔610可平衡螺母组件600上下两端的压力。如此容纳腔710可依次通过第二平衡孔610、通道800、第一平衡孔521、阀头520内部空间及阀口410而与第二腔体连通，阀针组件500上下移动时，电子膨胀阀10的上下空间内压力保持平衡，从而提高了电子膨胀阀10的开阀动作性能，降低了电子膨胀阀10的开阀动作电压，实现小型化、轻量化，同时也降低了对线圈驱动力的要求，实现对线圈和转子材料的降本，从而降低电子膨胀阀10的生产成本。
本申请的电子膨胀阀10包括阀座100、连接座200、导向套300、阀口座400、阀针组件500、螺母组件600以及阀壳体700。本申请的电子膨胀阀10，通过将连接座200和导向套300分体设置，在对导向套300和连接座200分别进行加工时，加工余量小，且加工的时间短，可以提高生产效率；同时，加工余量小，也可以进一步的减少原材料的损耗，降低成本；进一步地，在对导向套300和连接座200分别进行加工时，对刀具的磨损程度也较小，不需要经常更换刀具，提高了刀具的使用寿命，进一步降低了成本。更进一步地，电子膨胀阀10内还设置有平衡通道800，保证电子膨胀阀10内的压力平衡，以降低对线圈和转子的材料要求，从而更进一步地降低电子膨胀阀10的生产成本。
请参阅图1和图4，在一实施例中，所述连接座200具有第一通孔210和与所述第一通孔210连通的第二通孔220，所述导向套300包括安装部310，所述安装部310伸入所述第二通孔220并与所述连接座200连接。具体说来，所述安装部310伸入所述第二通孔220中，安装部310的外壁面与第二通孔220的内壁面抵接，安装部310还有部分外表面与连接座200的下端抵接，通过增大导向套300与连接座200的接触面积，以提高安装座与导向套300连接的稳固性。
请参阅图6，对于导向套300和连接座200的连接，可以有多种连接方式。在一实施例中，所述导向套300与所述连接座200焊接。具体地，所述导向套300和所述连接座200均采用金属材质制成时，可以将导向套300和连接座200焊接在一起，通过焊接的方式进行连接，进一步增强了导向套300与连接座200连接的稳固性。
请参阅图7和图8，在另一实施例中，所述导向套300与所述连接座200铆接。具体说来，所述导向套300和所述连接座200还可以通过铆接的方式进行连接，铆接后其导向套300与连接座200的连接处的变形小，且铆接方式对环境的要求低，铆接后的的零部件不易松动。将所述导向套300与所述连接座200焊接时，其通常是先通过装配设备将连接座200和导向套300装配在一起，然后在通过焊接设备将其焊接在一起，整个过程需要两台设备来实现。相比于焊接的方式，将导向套300和连接座200采用铆接的方式进行连接，工序少，只通过一台设备即可完成，且用时较短，可以提高电子膨胀阀10的生产效率。
进一步地，将所述导向套300与所述连接座200通过铆接的方式进行连接，此时所述连接座200的材质为不锈钢材质，所述导向套300的材质可以设置为铝合金材质，铝合金材质具有质量轻，强度高的优点，其密闭性能好，且耐腐蚀，成本也相对较低。使用铝合金材质的导向套300，可以实现轻量化，且还可以进一步降低电子膨胀阀10的生产成本。
当然，所述导向套300和所述连接座200还可以通过卡接或其他连接方式进行连接，对此不作具体限制。
请参阅图4和图5，在一实施例中，所述导向套300还包括导向部320，所述导向部320与所述安装部310连接，所述第一通孔210的下端面形成铆接面211，所述导向部320伸入所述第二通孔220并通过自身形变与所述铆接面211抵接。具体说来，所述第一通孔210的直径大于第二通孔220的直径，当将导向套300与连接座200进行铆接连接时，所述第一通孔210和第二通孔220的连接处（即第一通孔210的下端面）形成有铆接面211，导向部320与安装部310靠近端口110的一端连接，导向部320先伸入第二通孔220中，并一直延伸至第一通孔210中，然后通过铆接设备使导向部320变形至与铆接面211抵接，以将导向套300与连接座200固定连接。
请参阅图4和图5，在一实施例中，所述导向套300还包括本体部330，所述本体部330与所述安装部310连接，所述本体部330的上端面形成第一限位部331，所述第一限位部331与所述连接座200的下端面抵接。具体地，所述第一限位部331可以对导向套300的上端限位，以实现导向套300的固定，避免导向套300的安装部310过度压装至第二通孔220内。
在一实施例中，所述第一平衡孔521的数量大于或等于1，和/或所述第二平衡孔610的数量大于或等于1。可以理解的是，第一平衡孔521的数量至少为一个，也可以是多个；第二平衡孔610的数量至少为一个，也可以是多个，第一平衡孔521和第二平衡孔610的数量可以相同，也可以不同。第一平衡孔521和第二平衡孔610的数量以及孔径本实施例不做具体限定，不同规格的电子膨胀阀10可根据实际需要选择。
请参阅图4至图7，在一实施例中，所述连接座200包括定位段230和延伸段240，所述定位段230和所述延伸段240连接，所述定位段230具有外螺纹，所述端口110的内壁面具有内螺纹，所述定位段230和所述端口110的内壁面螺纹连接。具体地，为方便连接座200与阀座100的拆装，所述阀座100的端口110可以设置内螺纹，所述连接座200的定位段230可以设置外螺纹，两者螺纹配合连接，方便拆装。
进一步地，所述延伸段240的外壁面设置有凹槽241，所述电子膨胀阀10还包括密封件900，所述密封件900设置于所述凹槽241，并与所述阀座100的内壁面抵接。具体地，所述密封件900可以是橡胶圈，橡胶圈具有弹性，将橡胶圈放置在凹槽241中，凹槽241可以对密封件900起到较好的限位作用。所述密封件900采用过盈配合进行装配，在装配完成后，密封件900会发生形变，紧紧地与阀座100端口110的内壁面抵接，使得连接座200和阀座100密封连接，以提高连接座200和阀座100连接的密封性。当然，所述凹槽241也可以开设在阀座100端口110的内壁面上，使得密封件900与延伸段240的外壁面抵接，对所述凹槽241的开设位置不作具体限制。
请参阅图6或图7，在一实施例中，所述连接座200的最大直径为D1，所述导向套300的最大直径为D2，D1＞D2。具体说来，本申请的电子膨胀阀10的连接座200的最大直径大于导向套300的最大直径，因此在对连接座200和导向套300进行加工时，应当分别进行加工，相比于传统的将导向套300和连接座200一体设置的方案，本申请的技术方案，在对导向套300和连接座200分别进行加工时，加工余量小，且加工的时间短，可以提高生产效率；同时，加工余量小，也可以进一步的减少原材料的损耗，降低成本；进一步地，在对导向套300和连接座200分别进行加工时，对刀具的磨损程度也较小，不需要经常更换刀具，提高了刀具的使用寿命，进一步降低了成本。
请参阅图1和图5，在一实施例中，所述电子膨胀阀10还包括垫片1200，所述垫片1200与所述导向套300连接，并与所述阀口座400的下端抵接。具体地，还可以在阀口座400的下端设置一个垫片1200，垫片1200的上端和阀口座400的下端抵接，垫片1200与导向套300固定连接，可以对阀口座400起到支撑的作用。所述垫片1200上应当开设有与阀口座400的阀口410对应的开口，以供流体介质流通。所述垫片1200与导向套300的连接方式可以是铆接，也可以是焊接，对此不作具体限制。
请参阅图1和图2，在一实施例中，所述电子膨胀阀10还包括连接片1000，所述连接片1000设置于所述螺母组件600和所述连接座200的连接处，所述连接片1000上开设有与所述第二平衡孔610位置对应的通孔1010。具体地，该连接片1000可以遮盖螺母组件600与连接座200的连接处，以更进一步地提高螺母组件600和连接座200之间连接的密封性。该连接片1000与螺母组件600可以是嵌入螺母组件600的外侧周面而实现两者的卡接固定，其与螺母组件600可以是通过焊接固定，以更好地保证两者之间连接的稳定性。所述连接片1000呈圆环状片状设置，在其他实施例中，连接片1000也可以是多个隔板，并间隔排布于螺母组件600的外侧周面。由于连接片1000遮盖螺母组件600与连接座200的连接处，因此为不影响通道800与容纳腔710的连通，所述连接片1000上还开设有与所述第二平衡孔610位置对应的通孔1010，为保证连接座200在轴向方向上的两侧的压力平衡效果，所述通孔1010的孔径应当不小于所述第二平衡孔610的孔径。
请参阅图1和图3，在一实施例中，所述阀座100还具有第一接口130和第二接口140，所述导向套300具有介质流通腔340，所述第一接口130和所述第一阀腔121连通，所述第一阀腔121和所述介质流通腔340连通，所述阀口410与所述第二阀腔122连通，所述第二阀腔122和所述第二接口140连通；当所述阀头520打开所述阀口410时，所述第一接口130和所述第二接口140连通。
示例性地，所述第一接口130和第二接口140用来连接管道，当电子膨胀阀10工作，阀头520打开阀口410时，流体介质会先从第一接口130进入到第一阀腔121中，然后通过第一阀腔121进入到介质流通腔340中，然后在介质流通腔340中从阀口410流出至第二阀腔122，并最后通过第二接口140流出。需要说明的是，流体介质可从第一接口130或第二接口140中的任意一个口流入，并从另一个口流出，对此不作具体限制。
本申请还提出一种制冷设备，所述制冷设备包括上述电子膨胀阀10。所述电子膨胀阀10的具体结构参照上述实施例，由于本制冷设备采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。其中，所述制冷设备为空调器、冷冻机、冰箱或热泵热水器等。
以上所述仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的申请构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (14)

  1. 一种电子膨胀阀，其中，所述电子膨胀阀包括：
    阀座，一端形成有端口，所述阀座具有与所述端口连通的阀腔；
    连接座，设置于所述端口；
    导向套，设置于所述阀腔，所述导向套与所述连接座连接，所述导向套的下端面将所述阀腔分为第一阀腔和第二阀腔；
    阀口座，设置于所述阀腔，所述阀口座具有阀口，所述第一阀腔与所述第二阀腔可通过所述阀口连通；
    阀针组件，可移动地设置于所述导向套，所述阀针组件包括阀头，所述阀头可移动地插设于所述阀口内，以打开或关闭所述阀口；所述阀头的内部空间与所述阀口连通，所述阀头设有第一平衡孔；
    螺母组件，设置于所述连接座，并与所述阀针组件螺纹配合，所述螺母组件设有第二平衡孔；以及
    阀壳体，设置于所述连接座，并套设在所述螺母组件与所述阀针组件外，所述阀壳体的内部形成有容纳腔；
    其中，所述螺母组件、所述阀针组件及所述连接座之间形成有通道，所述第一平衡孔可将所述通道与所述阀头的内部空间连通，所述第二平衡孔可将所述通道与所述容纳腔连通。
  2. 如权利要求1所述的电子膨胀阀，其中，所述连接座具有第一通孔和与所述第一通孔连通的第二通孔，所述导向套包括安装部，所述安装部伸入所述第二通孔并与所述连接座连接。
  3. 如权利要求1或2所述的电子膨胀阀，其中，所述导向套与所述连接座焊接。
  4. 如权利要求1或2所述的电子膨胀阀，其中，所述导向套与所述连接座铆接。
  5. 如权利要求2至4中任意一项所述的电子膨胀阀，其中，所述导向套还包括导向部，所述导向部与所述安装部连接，所述第一通孔的下端面形成铆接面，所述导向部伸入所述第二通孔并通过自身形变与所述铆接面抵接。
  6. 如权利要求2至5中任意一项所述的电子膨胀阀，其中，所述导向套还包括本体部，所述本体部与所述安装部连接，所述本体部的上端面形成第一限位部，所述第一限位部与所述连接座的下端面抵接。
  7. 如权利要求1至6中任意一项所述的电子膨胀阀，其中，所述第一平衡孔的数量大于或等于1，和/或所述第二平衡孔的数量大于或等于1。
  8. 如权利要求1至6中任意一项所述的电子膨胀阀，其中，所述连接座包括定位段和延伸段，所述定位段和所述延伸段连接，所述定位段具有外螺纹，所述端口的内壁面具有内螺纹，所述定位段和所述端口的内壁面螺纹连接。
  9. 如权利要求8所述的电子膨胀阀，其中，所述延伸段的外壁面设置有凹槽，所述电子膨胀阀还包括密封件，所述密封件设置于所述凹槽，并与所述阀座的内壁面抵接。
  10. 如权利要求1至6中任意一项所述的电子膨胀阀，其中，所述连接座的最大直径为D1，所述导向套的最大直径为D2，D1＞D2。
  11. 如权利要求1至6中任意一项所述的电子膨胀阀，其中，所述电子膨胀阀还包括连接片，所述连接片设置于所述螺母组件和所述连接座的连接处，所述连接片上开设有与所述第二平衡孔位置对应的通孔。
  12. 如权利要求1至6中任意一项所述的电子膨胀阀，其中，所述阀座还具有第一接口和第二接口，所述导向套具有介质流通腔，所述第一接口和所述第一阀腔连通，所述第一阀腔和所述介质流通腔连通，所述阀口与所述第二阀腔连通，所述第二阀腔和所述第二接口连通；当所述阀头打开所述阀口时，所述第一接口和所述第二接口连通。
  13. 一种制冷设备，其中，所述制冷设备包括如权利要求1至12中任意一项所述的电子膨胀阀。
  14. 如权利要求13所述的制冷设备，其中，所述制冷设备为空调器、冷冻机、冰箱或热泵热水器。
PCT/CN2023/096408 2022-07-27 2023-05-25 电子膨胀阀及制冷设备 WO2024021821A1 (zh)

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CN216742910U (zh) * 2022-01-30 2022-06-14 盾安汽车热管理科技有限公司 电子膨胀阀
CN217784255U (zh) * 2022-07-27 2022-11-11 广东威灵电机制造有限公司 电子膨胀阀及制冷设备

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* 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
JPH1089528A (ja) * 1996-09-17 1998-04-10 Smc Corp 直動形２ポート電磁弁
CN106678382A (zh) * 2016-12-13 2017-05-17 盾安环境技术有限公司 一种车用空调系统电子膨胀阀
CN109780224A (zh) * 2017-11-13 2019-05-21 艾默生环境优化技术(苏州)有限公司 电子膨胀阀
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