WO2020025048A1 - 空调系统及其电子膨胀阀 - Google Patents

空调系统及其电子膨胀阀 Download PDF

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Publication number
WO2020025048A1
WO2020025048A1 PCT/CN2019/099044 CN2019099044W WO2020025048A1 WO 2020025048 A1 WO2020025048 A1 WO 2020025048A1 CN 2019099044 W CN2019099044 W CN 2019099044W WO 2020025048 A1 WO2020025048 A1 WO 2020025048A1
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WO
WIPO (PCT)
Prior art keywords
section
electronic expansion
valve
screw
expansion valve
Prior art date
Application number
PCT/CN2019/099044
Other languages
English (en)
French (fr)
Inventor
詹少军
何秋波
冯贵刚
Original Assignee
浙江盾安禾田金属有限公司
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 浙江盾安禾田金属有限公司 filed Critical 浙江盾安禾田金属有限公司
Priority to EP19845177.5A priority Critical patent/EP3789639B1/en
Priority to JP2020551489A priority patent/JP7082209B2/ja
Priority to US17/059,243 priority patent/US11473820B2/en
Priority to KR2020207000067U priority patent/KR200495690Y1/ko
Publication of WO2020025048A1 publication Critical patent/WO2020025048A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F16K1/422—Valve seats attachable by a threaded connection to the housing
    • 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
    • F16K27/10—Welded housings
    • F16K27/102—Welded housings for lift-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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return 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
    • F16K31/504—Mechanical actuating means with screw-spindle or internally threaded actuating means the actuating means being rotable, rising, and having internal threads which co-operate with threads on the outside of the valve body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present application relates to the technical field of air conditioning and refrigeration, and in particular to an air conditioning system and an electronic expansion valve thereof.
  • the air-conditioning system usually includes a condenser, an evaporator, and an electronic expansion valve.
  • the electronic expansion valve throttles and lowers the high-pressure liquid refrigerant from the condenser, regulates and controls the flow of the liquid refrigerant into the evaporator, and makes the refrigerant The flow meets the cooling demand.
  • the electronic expansion valve has a valve body, and a valve seat core, a valve needle and a welding ring are arranged inside the valve body.
  • the valve needle is penetrated in the valve seat core, and through the valve needle moving up and down, the opening degree of the valve seat core valve port can be controlled to achieve the control of the refrigerant flow rate.
  • the welding ring is used to connect the valve seat core and the valve body to achieve the fixation of the valve seat core and the valve body.
  • valve seat core has a complicated structure, which makes the installation and welding operation of the welding ring difficult, and the welding effect is poor, so the contact between the valve seat core and the valve body is not firm and the reliability is low.
  • An electronic expansion valve includes:
  • the valve body has a cylindrical structure, and the valve body includes a main body section, an extension section, and a stage stage connecting the main body section and the extension section, and an inner diameter of the main body section is larger than an inner diameter of the extension section;
  • the valve seat core has a cylindrical structure that is open at both ends.
  • the valve seat core includes a cylinder body and a limiting step formed at one end of the cylinder body.
  • the cylinder body passes through the extension section and the limiting position The step abuts against the inner wall of the stage and the end of the cylinder body far from the limit step protrudes from the extension;
  • An air outlet pipe is sleeved on the extension section and abuts against the outer wall of the stage, and the inner wall of the air outlet pipe and the outer wall of the cylinder and the extension section surround to form a welding ring receiving groove.
  • the limiting step is ring-shaped, and a surface of the limiting step facing the cylinder abuts against an inner wall of the stage.
  • the cylinder includes a mounting section and a welding section, the mounting section is located between the limit step and the welding section, and the mounting section is in interference fit with the extension section.
  • the length of the mounting section is shorter than the length of the extension section, and the outer diameter of the mounting section is greater than the outer diameter of the welding section, so that the inner wall of the extension section and the welding section An annular welding seam is formed between the outer walls of the segments, and the annular welding seam is in communication with the welding ring receiving groove.
  • the air outlet pipe is in an interference fit with the extension.
  • a valve needle is further included.
  • An end of the valve needle near the valve seat core cooperates with the opening, and an end of the valve needle near the valve seat core has a cone structure and has a diameter. The direction from the limiting step to the cylinder gradually decreases.
  • the method further includes a rotor, a screw, and a nut seat accommodated in the main body section.
  • the nut seat is fixed to an inner wall of the valve body and is threadedly connected to the screw.
  • the rotor is sleeved.
  • a mounting portion is provided on a side wall of the plastic-encapsulated casing, the insulating protection plate is mounted on the mounting portion, and the accommodation is formed between the insulating protection plate and a surface of the mounting portion Cavity.
  • a sleeve is also received and fixed in the main body section, and one end of the screw far from the rotor and one end of the valve needle far from the valve seat core are slidably received in Inside the sleeve.
  • it further includes an elastic member.
  • a middle portion of the screw protrudes along a radial direction of the screw to form a cylindrical boss.
  • the valve needle has a hollow structure. The inner wall of the valve needle extends along the valve needle.
  • the radial protrusion forms an annular boss, the elastic member is sleeved on the screw, and both ends of the elastic member are in contact with the surfaces of the annular boss and the cylindrical boss, respectively.
  • a sliding structure is provided in a middle portion of the annular boss, and a protruding structure is provided at an end of the screw far from the rotor, and a diameter of the protruding structure is larger than a caliber of a middle portion of the annular boss.
  • the extending direction of the annular boss, the cylindrical boss and the protruding structure is perpendicular to the axial direction of the valve body.
  • the nut seat includes a threaded portion and a mounting portion.
  • the threaded portion is disposed near the rotor.
  • the interior of the threaded portion is in communication with the interior of the mounting portion.
  • the screw is threaded through the threaded portion. And screwed with the threaded part.
  • an inner diameter of the mounting portion gradually increases in a direction from the screw portion to the mounting portion.
  • the electronic expansion valve further includes an air inlet pipe, and the air inlet pipe is connected to the main body section.
  • An air conditioning system including
  • the evaporator is in communication with an end of the air outlet pipe remote from the valve body, and the condenser is in communication with the main body section through a pipe.
  • valve seat core includes a cylinder body and a limiting step
  • the basic fixing of the valve seat core and the valve body can be achieved by the limiting step against the inner wall of the stage.
  • the end of the cylinder body that is far from the limit step protrudes from the extension section, and the inner wall of the air outlet pipe and the outer wall and extension section of the cylinder body form a welding ring accommodating groove. Therefore, during welding, the welding ring can be stably installed on the welding ring.
  • the molten liquid after the welding ring is melted and solidified with the outlet pipe, the valve seat core and the valve body, so that the outlet pipe, the valve seat core and the valve body are in close contact and fixed firmly.
  • the valve seat core in the above-mentioned electronic expansion valve has a simple structure, and the installation and welding operation of the welding ring is simple, and the welding effect is good.
  • the air outlet pipe can be fixed to the valve body while the valve body and the valve seat core are fixed, thereby having high reliability.
  • FIG. 1 is a cross-sectional view of an electronic expansion valve provided by the present application.
  • FIG. 2 is a partially enlarged view of a contact portion between a valve seat core and a valve body in an electronic expansion valve
  • FIG. 3 is a schematic structural diagram of an electronic expansion valve provided by the present application.
  • 100 indicates an electronic expansion valve
  • 110 indicates a valve body
  • 111 indicates a main body section
  • 112 indicates a stage
  • 113 indicates an extension section
  • 114 indicates a welding ring
  • 120 indicates a valve seat core
  • 121 indicates a limit step
  • 122 indicates a cylinder.
  • 1221 indicates the installation section
  • 1222 indicates the welding section
  • 123 indicates the annular welding seam
  • 124 indicates the welding ring receiving groove
  • 130 indicates the air pipe
  • 131 indicates the intake pipe
  • 140 indicates the valve needle
  • 141 indicates the cone structure
  • 142 indicates the annular convex
  • 150 indicates a rotor
  • 160 indicates a screw
  • 161 indicates a cylindrical boss
  • 162 indicates a convex structure
  • 170 indicates a nut seat
  • 171 indicates a threaded portion
  • 172 indicates a mounting portion
  • 180 indicates a sleeve
  • 190 indicates an elastic member.
  • a component when a component is called “installed on” another component, it may be directly on another component or a centered component may exist. When a component is considered to be “set on” another component, it can be directly set on another component or a centered component may exist at the same time. When a component is considered to be “fixed” to another component, it may be fixed directly to another component or there may be a centered component at the same time.
  • the present application provides an air conditioning system (not shown).
  • the air conditioning system includes a condenser (not shown), an evaporator (not shown), and an electronic expansion valve 100.
  • the electronic expansion valve 100 is connected to the condenser and the evaporator, respectively.
  • the condenser is a heat exchanger in an air conditioning system, and is generally installed outdoors. When the air conditioner is cooling, the condenser exchanges heat with the outside air to change the high-temperature and high-pressure liquid refrigerant into a medium-temperature and high-pressure liquid refrigerant.
  • the evaporator is an air-conditioning heat exchanger, and is generally installed indoors.
  • Both the condenser and the evaporator communicate with the electronic expansion valve 100 through a pipe.
  • the electronic expansion valve 100 controls the opening degree of the valve opening to control the flow rate of the liquid refrigerant from the condenser into the evaporator, and throttles the medium-temperature and high-pressure liquid refrigerant after heat exchange with the air. Reduce the pressure, so as to adjust the temperature of the room.
  • the air-conditioning system also includes components such as a compressor, so as to cooperate with the above-mentioned components to complete the cooling or heating purpose of the air-conditioning system.
  • the electronic expansion valve 100 in the preferred embodiment of the present application includes a valve body 110 and a valve seat core 120.
  • the valve seat core 120 is installed in the valve body 110.
  • the valve body 110 has a cylindrical structure.
  • the valve body 110 may be a cylinder, a square cylinder, a frame cylinder, or other forms of cylindrical structures.
  • the valve body 110 has a cylindrical structure. It can be understood that the cylindrical structure is simple to manufacture and the production cost is low.
  • the valve body 110 provided with a cylindrical structure facilitates the installation of the pipeline on the electronic expansion valve 100 and realizes the pipeline and the electronic expansion valve. 100 sealed connections.
  • the valve body 110 since the valve body 110 is disposed in the air-conditioning system, it also needs to have better mechanical strength to resist sudden temperature changes. Therefore, the valve body 110 should be made of a metal material.
  • the valve body 110 includes a main body section 111, a stage section 112, and an extension section 113.
  • the stage 112 connects the main body section 111 and the extended section 113.
  • the inner diameter of the main body section 111 is larger than the inner diameter of the extended section 113.
  • the main body section 111 is a working section in which the main components of the valve body 110 are set. Therefore, the main body section 111 should have a large built-in space.
  • the evaporator communicates with the main body section 111 through a pipe.
  • the stage 112 mainly functions to connect the main body section 111 and the extended section 113.
  • the extension 113 is used for fixing the pipeline.
  • the valve seat core 120 has a cylindrical structure that is open at both ends.
  • the valve seat core 120 having a cylindrical structure and the valve body 110 having a cylindrical structure have a better storage and fixing effect. Since the valve seat core 120 is disposed in the air-conditioning system, the valve seat core 120 should be made of a metal material with better mechanical strength.
  • the valve seat core 120 includes a cylinder 122 and a limiting step 121 formed on one end of the cylinder.
  • the cylindrical body 122 passes through the extension section 113.
  • the limiting step 121 abuts against the inner wall of the stage 112 and an end of the cylinder 122 away from the limiting step 121 protrudes from the extension 113. That is, it can be understood that a through hole (not shown in the figure) is started on the extension section 113, the cylindrical body 122 is installed in the through hole, and one end of the cylindrical body 122 extends to the outside of the through hole.
  • the opening of the valve seat core 120 at one end of the limiting step 121 is a valve port. By controlling the opening or closing of the valve port or under the opening size band, it can play a role of regulating and sealing the flow of the refrigerant.
  • the limiting step 121 may be stepped and include a plurality of bent portions.
  • the limiting step 121 may be ring-shaped and may be directly formed on the edge of the opening of the cylinder 122.
  • the limiting step 121 is annular, and the surface of the limiting step 121 facing the cylinder 122 abuts against the inner wall of the stage 112.
  • the annular limit step 121 has a simple forming method and low production cost. By providing a ring-shaped limiting step 121, the valve seat core 120 can be fixed in the valve body 110 through a simple structure, so that the electronic expansion valve 100 has a simpler structure, which is convenient for miniaturization of the electronic expansion valve 100 .
  • the air outlet pipe 130 is sleeved on the extension 113 and abuts against the outer wall of the stage 112.
  • the inner wall of the air outlet pipe 130 and the outer wall of the cylinder body 122 and the extension 113 surround the welding ring receiving groove 124.
  • the cylindrical body 122 extends to the outside of the through hole, that is, the cylindrical body 122 forms a step with the end surface of the extension section 113, and the air outlet pipe 130 is combined to form the welding ring receiving groove 124.
  • the evaporator is in communication with an end of the air outlet pipe 130 away from the valve body 110.
  • the electronic expansion valve further includes an air inlet pipe 131 through which the condenser communicates with the main body section 111.
  • the welding ring 114 is disposed in the welding ring receiving groove 124.
  • the molten solder of the welding ring 114 can adhere and solidify the valve body 110, the valve seat core 120, and the outlet pipe 130, so as to achieve a fixed connection between the gas pipe 130, the valve body 110, and the valve seat core 120. Therefore, by providing the welding ring accommodating groove 124, the fixing methods of the outlet pipe 130, the valve body 110 and the valve seat core 120 are integrated, thereby shortening the manufacturing time of the electronic expansion valve 100 and facilitating the work of the electronic expansion valve 100. effectiveness.
  • the refrigerant enters the valve body 110 from the intake pipe 131 and is throttled by the valve port, and then flows into the air outlet pipe 130 from the valve body 110 until it flows into the evaporator.
  • the air outlet pipe 130 is in an interference fit with the extension section 113. Therefore, the inner wall of the air outlet pipe 130 and the outer wall of the extension section 113 can be closely fitted. Even if the electronic expansion valve 100 shakes during the work, the air outlet pipe 130 can still be fixed on the extension 130, thereby facilitating the normal operation of the electronic expansion valve 100. In order to achieve a better fixing effect, the connection portion of the outlet pipe 130 sleeved on the outer wall of the extension section 113 needs to be fixed by welding.
  • the barrel 122 includes a mounting section 1221 and a welding section 1222.
  • the mounting section 1221 is located between the limiting step 121 and the welding section 1222.
  • the mounting section 1221 and the extension section 113 are in interference fit.
  • the welding section 1222 is located outside the through hole, and forms a welding ring receiving groove 124 with the extension section 113 and the air outlet pipe 30.
  • the interference fit between the mounting section 1221 and the extension section 113 enables the valve seat core 120 to be stably fixed in the valve body 110, thereby effectively preventing the electronic expansion valve 100 from causing the valve seat core 120 to sway during operation. Comes off from the valve body 110.
  • the interference fit method can also avoid the use of redundant fasteners, so that the electronic expansion valve 100 has a lighter weight, which is convenient to reduce the weight of the electronic expansion valve 100.
  • the length of the mounting section 1221 is less than the length of the extension section 113.
  • the outer diameter of the mounting section 1221 is greater than the outer diameter of the welding section 1222 so that an annular weld 123 is formed between the inner wall of the extension section 113 and the outer wall of the welding section 1222.
  • the molten liquid after the welding ring 114 melts can enter the annular weld 123 and solidify in the annular weld 123.
  • the contact area of the valve seat core 120 and the valve body 110 can be effectively increased, thereby having a better fixing effect and higher reliability.
  • the electronic expansion valve 100 further includes a valve needle 140.
  • An end of the valve needle 140 near the valve seat core 120 is matched with an opening (ie, a valve port) of the limiting step 121 to control the opening degree of the opening.
  • the end of the valve needle 140 near the valve seat core 120 has a cone structure 141, and its diameter gradually decreases along the direction of the limiting step 121 to the cylinder 122.
  • the cone structure 141 slides along the length of the valve body 110, and can control the opening degree of the opening of the limit step 121, thereby controlling the flow rate of the refrigerant, and achieving the indoor temperature control of the air conditioner.
  • the electronic expansion valve 100 further includes a rotor 150, a screw 160 and a nut seat 170 received in the main body section 111.
  • the nut seat 170 is fixed to the inner wall of the valve body 110 and is threadedly connected to the screw 160.
  • the rotor 150 is sleeved on the nut seat 170 and is fixedly connected to one end of the screw 160.
  • An end of the screw 160 far from the rotor 150 is drivingly connected to the valve needle 140.
  • the rotor 150 rotates to drive the screw 160 to move, and the screw 160 drives the valve needle 140 to control the opening, closing, or opening of the valve port.
  • the rotor 150 drives the screw 160 to rotate.
  • the screw 160 converts the circular motion of the rotor 150 into a linear motion, and drives the valve needle 140 to move along the length of the valve body 110, thereby achieving the opening control of the opening of the limit step 121 (the opening includes opening, Closed or opening size).
  • the rotor 150, the nut seat 170, and the screw 160 are provided to convert the curved movement into a linear movement, which can effectively reduce the volume of the valve body 110 and facilitate the miniaturization of the electronic expansion valve 100.
  • the nut seat 170 includes a threaded portion 172 and a mounting portion 174.
  • the inside of the screw portion 172 communicates with the inside of the mounting portion 174.
  • the screw portion 172 has a cylindrical shape and extends along the longitudinal direction of the valve body 110.
  • the screw 160 is threaded through the threaded portion 172 and is screwed with the threaded portion 172.
  • the screw portion 172 has a guiding and limiting effect on the screw 160, and can limit the movement of the screw 160 along the length direction of the valve body 110.
  • the rotor 150 is sleeved on the threaded portion 172.
  • the mounting portion 174 is disposed at an end of the threaded portion 172 away from the rotor 150.
  • An end of the mounting portion 174 remote from the threaded portion 172 is provided with an opening communicating with the nut seat 170. It is enlarged to facilitate providing sufficient space for connecting the screw 160 and the valve needle 140.
  • a coil is also sleeved outside the valve body 110.
  • a magnetic field is generated after the coil is energized, which can drive the rotor 150 to rotate.
  • the electronic expansion valve 100 further includes a sleeve 180 received and fixed to the main body section 111.
  • One end of the screw 160 far from the rotor 150 and one end of the valve needle 140 far from the valve seat core 120 can be slidably received in the sleeve 180.
  • one end of the sleeve 180 is clamped to the mounting portion 174 of the nut seat 170, and a sidewall of the sleeve 180 is fixed to the valve body 110 by a fastener.
  • the sleeve 180 extends in the length direction of the valve needle 140.
  • the sleeve 180 can be used to guide and limit the sliding of the screw 160 and the valve needle 140; at the same time, it can prevent the valve needle 140 from swinging during the movement and affect the movement accuracy of the valve needle 140.
  • the electronic expansion valve 100 further includes an elastic member 190.
  • a middle portion of the screw 160 protrudes in a radial direction thereof to form a cylindrical boss 161.
  • the valve needle 140 has a hollow structure.
  • the inner wall of the valve needle 140 protrudes inwardly and radially to form an annular boss 142.
  • An elastic member 190 is sleeved on the screw 160, and its two ends are respectively connected to the annular boss 142 and the cylindrical boss.
  • the surface of 161 abuts.
  • the screw 160 is slidably disposed in the middle of the annular boss 142.
  • a protruding structure 162 is provided on an end of the screw 160 far from the rotor 150, and a diameter of the protruding structure 162 is larger than a diameter of a middle portion of the annular boss 142.
  • the cylindrical boss 161 is housed in the sleeve 180 and is located outside the valve needle 140.
  • the protruding structures 162 are received in the valve needle 140, and the protruding structures 162 and the cylindrical bosses 161 are respectively located on opposite sides of the annular boss 142.
  • the elastic member 190 provides an elastic restoring force for the annular boss 142 to the valve seat core 120, which in turn can drive the valve needle 140 to move in the direction toward the valve seat core 120, so that the opening of the limit step 121 is reduced, and the refrigerant The flow rate into the valve body 110 is also reduced.
  • the screw 160 drives the convex structure 162 to move in a direction away from the valve seat core 120, and the convex structure 162 presses the annular boss 142 of the valve needle 140, which in turn drives The valve needle 140 moves in a direction away from the valve seat core 120 to adjust the opening degree of the opening.
  • the transmission method of the screw 160 and the valve needle 140 is simple and easy, and it is convenient to improve work efficiency.
  • the screw 160 and the valve needle 140 can be effectively prevented from swinging during the sliding process, thereby having better operation accuracy.
  • the elastic member 190 is a sleeve spring, and the sleeve spring is sleeved on the screw 160. It can be understood that the sleeve spring is sleeved on the screw 160, so that the installation of the elastic member 190 is simple and easy to improve the work efficiency. Moreover, the sleeve spring is sleeved on the screw 160, and the screw 160 can also support the sleeve spring. In order to prevent the sleeve spring from swinging during the movement, the operation accuracy of the electronic expansion valve 100 is affected.
  • the extending direction of the annular boss 142, the cylindrical boss 161, and the protruding structure 162 is perpendicular to the axial direction of the valve body 110.
  • the sleeve spring and the annular boss 142, the protruding structure 162 and the annular boss 142 have a large contact area, so that the screw 160 and the valve needle 140 can be effectively prevented During the running process, the squeeze force is too small due to the swing offset, and the valve needle 140 fails to move. In addition, the screw 160 and the valve needle 140 have better transmission performance.
  • the valve seat core 120 includes a cylinder 122 and a limiting step 121.
  • the valve seat core 120 and the valve body 110 can be basically fixed.
  • an end of the cylinder body 122 far from the limiting step 121 protrudes from the extension section 113, and the inner wall of the air outlet pipe 130 and the outer wall of the cylinder body 122 and the extension section 113 surround a welding ring receiving groove 124. Therefore, during welding, the welding The ring 114 can be stably installed in the welding ring accommodating groove 124.
  • the melted welding liquid of the welding ring 114 will adhere to and solidify with the gas outlet pipe 130, the valve seat core 120 and the valve body 110, so that the gas outlet pipe 130 and the valve seat core will be solidified.
  • the 120 and the valve body 110 are in close contact and firmly fixed. Therefore, compared with the conventional valve seat core 120, the valve seat core 120 in the above-mentioned electronic expansion valve 100 has a simple structure, a simple installation and welding operation of the welding ring 114, and a good welding effect.
  • the air outlet pipe 130 can be fixed to the valve body 110, thereby having high reliability.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Valve Housings (AREA)

Abstract

一种空调系统及其电子膨胀阀（100），电子膨胀阀（100）包括：阀体（110），阀体（110）包括主体段（111）、延伸段（113）及台阶段（112），主体段（111）的内径大于延伸段（113）的内径；阀座芯（120），呈两端开口的筒状结构，阀座芯（120）包括筒体（122）及形成于筒体（122）一端的限位台阶（121），筒体（122）穿设于延伸段（113），限位台阶（121）与台阶段（112）的内壁抵持且筒体（122）伸出延伸段（113）；出气管（130），套设于延伸段（113）并与台阶段（112）的外壁抵持，出气管（130）的内壁与筒体（122）的外壁及延伸段（113）围绕形成焊环容置槽（124）。

Description

空调系统及其电子膨胀阀
相关申请
本申请要求2018年8月02日申请的，申请号为201821242025.2，名称为“空调及其电子膨胀阀”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及空调制冷技术领域，尤其涉及一种空调系统及其电子膨胀阀。
背景技术
空调系统通常包括冷凝器、蒸发器及电子膨胀阀，电子膨胀阀将来自冷凝器中的高压液态制冷剂节流降压，调节和控制进入蒸发器中的液态制冷剂的流量，从而使得制冷剂的流量符合制冷需求。
电子膨胀阀具有阀体，阀体内部设置有阀座芯、阀针及焊环。阀针穿设于阀座芯内，通过阀针上下运动，可控制阀座芯阀口的开度，以实现制冷剂流量的控制。焊环用于连接阀座芯与阀体，以实现阀座芯与阀体的固定。
然而，现有阀座芯结构复杂，使得焊环的安装及焊接操作难度大，焊接效果差，因而阀座芯与阀体接触不牢固，可靠性低。
发明内容
基于此，有必要针对现有的电子膨胀阀可靠性低的问题，提供一种具有较高可靠性的空调系统及其电子膨胀阀。
一种电子膨胀阀，所述电子膨胀阀包括：
阀体，呈筒状结构，所述阀体包括主体段、延伸段及连接所述主体段与所述延伸段的台阶段，所述主体段的内径大于所述延伸段的内径；
阀座芯，呈两端开口的筒状结构，所述阀座芯包括筒体及形成于所述筒体一端的限位台阶，所述筒体穿设于所述延伸段，所述限位台阶与所述台阶段的内壁抵持且所述筒体远离所述限位台阶的一端伸出所述延伸段；及
出气管，套设于所述延伸段并与所述台阶段的外壁抵持，所述出气管的内壁与所述筒体的外壁及所述延伸段围绕形成焊环容置槽。
在其中一个实施例中，所述限位台阶呈环状，所述限位台阶朝向所述筒体的表面与所述台阶段的内壁抵持。
在其中一个实施例中，所述筒体包括安装段及焊接段，所述安装段位于所述限位台阶与所述焊接段之间，所述安装段与所述延伸段过盈配合。
在其中一个实施例中，所述安装段的长度小于所述延伸段的长度，且所述安装段的外径大于所述焊接段的外径，以使所述延伸段的内壁与所述焊接段的外壁之间形成环形焊缝，所述环形焊缝与所述焊环容置槽连通。
在其中一个实施例中，所述出气管与所述延伸段过盈配合。
在其中一个实施例中，还包括阀针,所述阀针靠近所述阀座芯的一端与所述开口配合，所述阀针靠近所述阀座芯的一端呈圆锥体结构，且其直径沿所述限位台阶至所述筒体的方向逐渐减小。
在其中一个实施例中，还包括收容于所述主体段内的转子、螺杆及螺母座，所述螺母座固定于所述阀体的内壁，并与所述螺杆螺纹连接，所述转子套设于所述螺母座，并与所述螺杆的一端固定连接，所述螺杆远离所述转子的一端与所述阀针传动连接，所述转子能够绕所述螺杆的轴线转动，以带动所述螺 杆及所述阀针滑动。在其中一个实施例中，所述塑封壳体的侧壁设置有安装部，所述绝缘防护板安装于所述安装部，所述绝缘防护板与所述安装部的表面之间形成所述收容腔。
在其中一个实施例中，还包括收容并固定于所述主体段内的套筒，所述螺杆远离所述转子的一端、及所述阀针远离所述阀座芯的一端均滑动地收容于所述套筒内。
在其中一个实施例中，还包括弹性件，所述螺杆的中部沿所述螺杆的径向突起形成圆柱形凸台，所述阀针呈中空结构，所述阀针的内壁沿所述阀针的径向突起形成环形凸台，所述弹性件套设于所述螺杆，且所述弹性件的两端分别与所述环形凸台及所述圆柱形凸台的表面抵接，所述螺杆滑动地穿设于所述环形凸台的中部，所述螺杆的远离所述转子的一端设置有凸起结构，所述凸起结构的直径大于所述环形凸台中部的口径。
在其中一个实施例中，所述环形凸台、圆柱形凸台及凸起结构的延伸方向与阀体的轴向方向垂直。
在其中一个实施例中，所述螺母座包括螺纹部及安装部，螺纹部靠近所述转子设置，所述螺纹部的内部与所述安装部的内部连通，所述螺杆穿设于螺纹部，并与螺纹部螺纹连接。
在其中一个实施例中，所述安装部的内径沿所述螺纹部至所述安装部的方向逐渐增大。
在其中一个实施例中，所述电子膨胀阀还包括进气管，所述进气管连接于所述主体段。
本申请还提供如下技术方案
一种空调系统，包括
冷凝器；
蒸发器；及
上述的电子膨胀阀，所述蒸发器与所述出气管远离所述阀体的一端连通，所述冷凝器通过管道与所述主体段连通。
上述空调系统及其电子膨胀阀具有以下优点：
由于阀座芯包括筒体及限位台阶，通过限位台阶与台阶段的内壁抵持，可实现阀座芯与阀体的基本固定。进一步地，筒体远离限位台阶的一端伸出于延伸段，出气管的内壁与筒体的外壁及延伸段围绕形成焊环容置槽，因此，焊接时，焊环可稳定的安装于焊环容置槽内，焊环融化后的焊液将与出气管、阀座芯及阀体贴合并固化，进而使得出气管、阀座芯及阀体接触紧密，固定牢靠。因此，相较于传统的阀座芯而言，上述电子膨胀阀中的阀座芯结构简单，且焊环的安装及焊接操作简单，焊接效果好。而且，还可在固定阀体与阀座芯的同时，将出气管固定于阀体，从而具有较高的可靠性。
附图说明
图1为本申请提供的电子膨胀阀的剖面图；
图2为电子膨胀阀中的阀座芯与阀体接触部分的局部放大图；
图3为本申请提供的电子膨胀阀的结构示意图。
图中，100表示电子膨胀阀、110表示阀体、111表示主体段、112表示台阶段、113表示延伸段、114表示焊环、120表示阀座芯、121表示限位台阶、122表示筒体、1221表示安装段、1222表示焊接段、123表示环形焊缝、124表示焊环容置槽、130表示出气管、131表示进气管、140表示阀针、141表示圆锥体结构、142表示环形凸台、150表示转子、160表示螺杆、161表示圆柱形 凸台、162表示凸起结构、170表示螺母座、171表示螺纹部、172表示安装部、180表示套筒、190表示弹性件。
具体实施方式
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做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。
需要说明的是，当组件被称为“装设于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。当一个组件被认为是“固定于”另一个组件，它可以是直接固定在另一个组件上或者可能同时存在居中组件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
请参阅图1，本申请提供了一种空调系统(图未示)，该空调系统包括冷凝器(图未示)、蒸发器(图未示)及电子膨胀阀100。所述电子膨胀阀100分别与所述冷凝器、蒸发器连接。
冷凝器为空调系统中的换热器，一般安装于室外。在空调制冷时，冷凝器与外界的空气进行热交换，将高温高压的液态制冷剂变成中温高压的液态制冷剂。蒸发器为空调的热交换器，一般设置于室内。
冷凝器及蒸发器均通过管道与电子膨胀阀100连通。具体地，电子膨胀阀100通过控制其阀口的开度大小，以控制液态制冷剂从冷凝器进入蒸发器中的流量，以及对经与空气换热后的中温高压的液态制冷剂进行节流降压，从而起到调节室内温度的作用。
当然，空调系统除了冷凝器、蒸发器及电子膨胀阀100之外，还包括压缩机等部件，以配合上述部件完成空调系统的制冷或制热目的。
请一并参阅图2及图3，本申请较佳实施例中的电子膨胀阀100包括阀体110及阀座芯120。阀座芯120安装于阀体110内。
阀体110呈筒状结构。具体地，阀体110可以为圆筒、方筒、框筒或者其他形式的筒状结构。具体在本实施例中，阀体110为圆筒状结构。可以理解的是，圆筒状结构制作简单，生产成本低。而且，通常情况下，由于冷凝器及蒸发器均通过管道与电子膨胀阀100连通，因此，设置圆筒状结构的阀体110便于管道安装于电子膨胀阀100上，并实现管道与电子膨胀阀100的密封连接。此外，由于阀体110设置于空调系统内，还需具有较佳的抵抗温度急剧变化的机械强度，因此，阀体110应由金属材料制作。
阀体110包括主体段111、台阶段112及延伸段113。台阶段112连接主体段111与延伸段113。主体段111的内径大于延伸段113的内径。
主体段111为设置阀体110主要元件的工作段，因此，主体段111应具有较大的内置空间。在空调中，蒸发器通过管道与主体段111连通。
台阶段112主要起连接主体段111及延伸段113的作用。延伸段113用于固定管道。
阀座芯120呈两端开口的筒状结构。呈筒状结构的阀座芯120与呈筒状结构的阀体110具有较佳的收容固定效果。由于阀座芯120设置于空调系统内， 因此，阀座芯120应由具有较佳机械强度的金属材料制作。
阀座芯120包括筒体122及形成于筒体一端的限位台阶121。筒体122穿设于延伸段113。限位台阶121与台阶段112的内壁抵持且筒体122远离限位台阶121的一端伸出于延伸段113。即，可以理解的是，延伸段113上开始有通孔(图未标注)，筒体122安装于通孔内，且筒体122的一端延伸至通孔的外部。阀座芯120位于限位台阶121一端的开口为阀口，通过控制阀口的打开、关闭或者开口大小带下，可起到制冷剂的流量调节及密封作用。
具体地，限位台阶121可以为阶梯状，并包括多个弯折部分。又或者，限位台阶121也可以为环状，直接形成于筒体122开口的边缘即可。具体在本实施例中，限位台阶121呈环状，限位台阶121朝向筒体122的表面与台阶段112的内壁抵持。
环状的限位台阶121成型方式简单，生产成本低。通过设置环状的限位台阶121，使得阀座芯120通过简单的构造即可固定于阀体110内，从而使得电子膨胀阀100具有更为简单的构造，便于实现电子膨胀阀100的小型化。
出气管130套设于延伸段113并与台阶段112的外壁抵持。出气管130的内壁与筒体122的外壁及延伸段113围绕形成焊环容置槽124。可以理解的是，筒体122延伸至通孔的外部，即筒体122与延伸段113的端面形成台阶，结合出气管130从而围成所述焊环容置槽124。
在空调系统中，蒸发器与出气管130远离阀体110的一端连通。此外，电子膨胀阀还包括进气管131，冷凝器通过进气管131与主体段111连通。
焊环114设置于焊环容置槽124内。焊接时，焊环114熔融的焊液可将阀体110、阀座芯120及出气管130粘附并固化，从而实现出气管130、阀体110及阀座芯120的固定连接。故通过设置焊环容置槽124，使得出气管130、阀体 110与阀座芯120之间的固定方式一体化，从而缩短了电子膨胀阀100的制造时间，便于提高电子膨胀阀100的工作效率。
空调系统工作时，制冷剂从进气管131进入阀体110，经所述阀口节流后，从阀体110内流入出气管130，直至流入到蒸发器。
进一步地，在本实施例中，出气管130与延伸段113过盈配合。故出气管130的内壁与延伸段113的外壁之间可紧密贴合。即使，电子膨胀阀100在工作的过程中发生晃动，出气管130仍可固定于延伸段130上，从而便于维持电子膨胀阀100的正常工作。为达到较佳的固定效果，出气管130套设于延伸段113外壁的连接部位还需通过焊接固定。
在本实施例中，筒体122包括安装段1221及焊接段1222。安装段1221位于限位台阶121与焊接段1222之间，安装段1221与延伸段113过盈配合。焊接段1222位于通孔的外部，并与延伸段113、出气管30围成焊环容置槽124。
通过将安装段1221与延伸段113过盈配合，使得阀座芯120可稳定地固定于阀体110内，进而可有效防止电子膨胀阀100在工作的过程中因发生晃动而导致阀座芯120从阀体110上脱落。而且，过盈配合的方式还可避免使用多余的紧固件，从而使得电子膨胀阀100具有较轻的重量，便于实现电子膨胀阀100的轻量化。
进一步地，在本实施例中，安装段1221的长度小于延伸段113的长度。安装段1221的外径大于焊接段1222的外径以使延伸段113的内壁与焊接段1222的外壁之间形成环形焊缝123。
焊接时，焊环114融化后的焊液可进入环形焊缝123，并在环形焊缝123中固化。通过设置环形焊缝123，可有效的增大阀座芯120与阀体110的接触面积，从而具有较佳的固定效果，因而可靠性更高。
在本实施例中，电子膨胀阀100还包括阀针140。阀针140的靠近所述阀座芯120的一端与限位台阶121的开口(即阀口)配合，以控制所述开口的开度大小。阀针140靠近所述阀座芯120的一端呈圆锥体结构141，且其直径沿限位台阶121至筒体122的方向逐渐减小。
圆锥体结构141沿阀体110的长度方向滑动，可控制限位台阶121开口的开度大小，进而可控制制冷剂通过的流量，实现空调对室内温度的控制。
在本实施例中，电子膨胀阀100还包括收容于主体段111的转子150、螺杆160及螺母座170。螺母座170固定于阀体110的内壁，并与螺杆160螺纹连接。转子150套设于螺母座170，并与螺杆160的一端固定连接。螺杆160远离转子150的一端与阀针140传动连接，转子150转动，带动螺杆160运动，螺杆160带动阀针140运动，以实现控制阀口的打开、关闭或者开口大小。
转子150带动螺杆160转动，螺杆160将转子150的圆周运动转化为直线运动，带动阀针140沿阀体110的长度方向运动，进而实现限位台阶121开口的开度控制(开度包括打开、关闭或者开口大小)。通过设置转子150，螺母座170及螺杆160，将曲线运动转化为直线运动，可有效的减小阀体110的体积，便于实现电子膨胀阀100的小型化。
在本实施例中，螺母座170包括螺纹部172及安装部174。螺纹部172的内部与安装部174内部连通。具体地，螺纹部172呈筒状，并沿阀体110的长度方向延伸。螺杆160穿设于螺纹部172，并与螺纹部172螺纹连接。螺纹部172对螺杆160具有导向及限位作用，可将螺杆160的运动限制于沿阀体110的长度方向。转子150套设于螺纹部172。安装部174设置于螺纹部172远离转子150的一端，安装部174远离螺纹部172的一端开设有与螺母座170连通的开口，且安装部174的内径沿螺纹部172至安装部174的方向逐渐增大，从而便于提 供足够的空间以使螺杆160与阀针140连接。
通常，为了实现转子150的转动，在阀体110外部还套设有线圈。线圈通电之后产生磁场，可带动转子150转动。
进一步地，在本实施例中，电子膨胀阀100还包括收容并固定于主体段111的套筒180。螺杆160远离转子150的一端、阀针140远离阀座芯120的一端均可滑动地收容于套筒180内。
具体地，套筒180的一端卡持于螺母座170的安装部174，且套筒180的侧壁通过紧固件固定于阀体110上。套筒180沿阀针140的长度方向延伸。通过设置套筒180，可对螺杆160及阀针140的滑动起导向及限位作用；同时，可防止阀针140在运动过程中发生摆动而影响阀针140的运动精度。
在本实施例中，电子膨胀阀100还包括弹性件190。螺杆160的中部沿其径向方向突起形成圆柱形凸台161。阀针140呈中空结构，阀针140的内壁沿其径向并向内突起形成环形凸台142，弹性件190套设于螺杆160，且其两端分别与环形凸台142及圆柱形凸台161的表面抵接。螺杆160可滑动地穿设于环形凸台142的中部。螺杆160的远离所述转子150的一端设置有凸起结构162，凸起结构162的直径大于环形凸台142中部的口径。
具体的，圆柱形凸台161收容于套筒180内，并位于阀针140外。凸起结构162收容于阀针140内，且凸起结构162与圆柱形凸台161分别位于环形凸台142相对的两侧。电子膨胀阀100工作时，螺杆160沿朝向阀座芯120的方向运动，圆柱形凸台161挤压弹性件190，弹性件190压缩。弹性件190为环形凸台142提供一指向阀座芯120的弹性回复力，继而可带动阀针140沿朝向阀座芯120的方向运动，使得限位台阶121的开口开度减小，制冷剂流入阀体110内的流量亦减小。当需要增大限位台阶121的开口的开度时，螺杆160带动 凸起结构162沿背向阀座芯120的方向移动，凸起结构162挤压阀针140的环形凸台142，继而带动阀针140沿背向阀座芯120的方向移动，以实现开口开度的调整。
可以理解的是，通过设置弹性件190、圆柱形凸台161、环形凸台142及凸起结构162，使得螺杆160与阀针140的传动方式简单易行，便于提高工作效率。通过螺母座170、套管、阀针140及螺杆160的层层套设，可有效防止螺杆160及阀针140在滑动过程中发生摆动，从而具有较佳的运行精准度。
进一步地，在本实施例中，弹性件190为套簧，套簧套设于螺杆160。可以理解的是，套簧套设于螺杆160，使得弹性件190的安装简单易行，便于提高工作效率；而且，套簧套设于螺杆160上，螺杆160还可对套簧起支撑作用，以防止套簧在运动的过程中发生摆动而影响电子膨胀阀100的运行精度。
更进一步地，在本实施例中，环形凸台142、圆柱形凸台161及凸起结构162的延伸方向与阀体110的轴向方向垂直。
因此，在螺杆160及阀针140的运行过程中，套簧与环形凸台142，凸起结构162与环形凸台142之间具有较大的接触面积，从而可有效防止螺杆160及阀针140在运行过程中因发生摆动偏移而导致挤压力过小，阀针140运动失效的情况发生，进而，使螺杆160与阀针140具有较佳的传动性能。
上述电子膨胀阀100，阀座芯120包括筒体122及限位台阶121，通过限位台阶121与台阶段112的内壁抵持，可实现阀座芯120与阀体110的基本固定。进一步地，筒体122远离限位台阶121的一端伸出于延伸段113，出气管130的内壁与筒体122的外壁及延伸段113围绕形成焊环容置槽124，因此，焊接时，焊环114可稳定的安装于焊环容置槽124内，焊环114融化后的焊液将与出气管130、阀座芯120及阀体110贴合并固化，进而使得出气管130、阀座 芯120及阀体110接触紧密，固定牢靠。因此，相较于传统的阀座芯120而言，上述电子膨胀阀100中的阀座芯120结构简单，且焊环114的安装及焊接操作简单，焊接效果好。而且，还可在固定阀体110与阀座芯120的同时，将出气管130固定于阀体110，从而具有较高的可靠性。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (14)

  1. 一种电子膨胀阀，其特征在于，所述电子膨胀阀包括：
    阀体(110)，呈筒状结构，所述阀体(110)包括主体段(111)、延伸段(113)及连接所述主体段(111)与所述延伸段(113)的台阶段(112)，所述主体段(111)的内径大于所述延伸段(113)的内径；
    阀座芯(120)，呈两端开口的筒状结构，所述阀座芯(120)包括筒体(122)及形成于所述筒体(122)一端的限位台阶(121)，所述筒体(122)穿设于所述延伸段(113)，所述限位台阶(121)与所述台阶段(112)的内壁抵持且所述筒体(122)远离所述限位台阶(121)的一端伸出所述延伸段(113)；及
    出气管(130)，套设于所述延伸段(113)并与所述台阶段(112)的外壁抵持，所述出气管(130)的内壁与所述筒体(122)的外壁及所述延伸段(113)围绕形成焊环容置槽(124)。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述限位台阶(121)呈环状，所述限位台阶(121)朝向所述筒体(122)的表面与所述台阶段(112)的内壁抵持。
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，所述筒体(122)包括安装段(1221)及焊接段(1222)，所述安装段(1221)位于所述限位台阶(121)与所述焊接段(1222)之间，所述安装段(1221)与所述延伸段(113)过盈配合。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，所述安装段(1221)的长度小于所述延伸段(113)的长度，且所述安装段(1221)的外径大于所述焊接段(1222)的外径，以使所述延伸段(113)的内壁与所述焊接段(1222)的外壁之间形成环形焊缝(123)，所述环形焊缝(123)与所述焊环容置槽(124) 连通。
  5. 根据权利要求1所述的电子膨胀阀，其特征在于，所述出气管(130)与所述延伸段(113)过盈配合。
  6. 根据权利要求1所述的电子膨胀阀，其特征在于，还包括阀针(140),所述阀针(140)靠近所述阀座芯(120)的一端与所述开口配合，所述阀针(140)靠近所述阀座芯(120)的一端呈圆锥体结构(141)，且所述圆锥体结构(141)的直径沿所述限位台阶(121)至所述筒体(122)的方向逐渐减小。
  7. 根据权利要求6所述的电子膨胀阀，其特征在于，还包括收容于所述主体段(111)内的转子(150)、螺杆(160)及螺母座(170)，所述螺母座(170)固定于所述阀体(110)的内壁，并与所述螺杆(160)螺纹连接，所述转子(150)套设于所述螺母座(170)，并与所述螺杆(160)的一端固定连接，所述螺杆(160)远离所述转子(150)的一端与所述阀针(140)传动连接，所述转子(150)能够绕所述螺杆(160)的轴线转动，以带动所述螺杆(160)及所述阀针(140)滑动。
  8. 根据权利要求7所述的电子膨胀阀，其特征在于，还包括收容并固定于所述主体段(111)内的套筒(180)，所述螺杆(160)远离所述转子(150)的一端、及所述阀针(140)远离所述阀座芯(120)的一端均滑动地收容于所述套筒(180)内。
  9. 根据权利要求7所述的电子膨胀阀，其特征在于，还包括弹性件(190)，所述螺杆(160)的中部沿所述螺杆(160)的径向突起形成圆柱形凸台(161)，所述阀针(140)呈中空结构，所述阀针(140)的内壁沿所述阀针(140)的径向突起形成环形凸台(142)，所述弹性件(190)套设于所述螺杆(160)，且所述弹性件(190)的两端分别与所述环形凸台(142)及所述圆柱形凸台(161) 的表面抵接，所述螺杆(160)滑动地穿设于所述环形凸台(142)的中部，所述螺杆(160)的远离所述转子(150)的一端设置有凸起结构，所述凸起结构的直径大于所述环形凸台(142)中部的口径。
  10. 根据权利要求9所述的电子膨胀阀，其特征在于，所述环形凸台(142)、圆柱形凸台(161)及凸起结构(162)的延伸方向与阀体(110)的轴向方向垂直。
  11. 根据权利要求7所述的电子膨胀阀，其特征在于，所述螺母座(170)包括螺纹部(171)及安装部(172)，螺纹部(171)靠近所述转子(150)设置，所述螺纹部(171)的内部与所述安装部(172)的内部连通，所述螺杆(160)穿设于螺纹部(171)，并与螺纹部(171)螺纹连接。
  12. 根据权利要求11所述的电子膨胀阀，其特征在于，所述安装部(172)的内径沿所述螺纹部(171)至所述安装部(172)的方向逐渐增大。
  13. 根据权利要求1所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括进气管(131)，所述进气管(131)连接于所述主体段(111)。
  14. 一种空调系统，其特征在于，包括：
    冷凝器；
    蒸发器；及
    如上述权利要求1至13任意一项所述的电子膨胀阀，所述蒸发器与所述出气管(130)远离所述阀体(110)的一端连通，所述冷凝器通过管道与所述主体段(111)连通。
PCT/CN2019/099044 2018-08-02 2019-08-02 空调系统及其电子膨胀阀 WO2020025048A1 (zh)

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