WO2021057019A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2021057019A1
WO2021057019A1 PCT/CN2020/086494 CN2020086494W WO2021057019A1 WO 2021057019 A1 WO2021057019 A1 WO 2021057019A1 CN 2020086494 W CN2020086494 W CN 2020086494W WO 2021057019 A1 WO2021057019 A1 WO 2021057019A1
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WO
WIPO (PCT)
Prior art keywords
section
guide sleeve
electronic expansion
housing
expansion valve
Prior art date
Application number
PCT/CN2020/086494
Other languages
English (en)
French (fr)
Inventor
詹少军
邸志强
冯贵刚
Original Assignee
浙江盾安人工环境股份有限公司
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
Priority claimed from CN201910927066.8A external-priority patent/CN112576769B/zh
Priority claimed from CN201921637697.8U external-priority patent/CN210920141U/zh
Priority claimed from CN201921636034.4U external-priority patent/CN210920266U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Priority to US17/763,725 priority Critical patent/US20220341638A1/en
Priority to JP2021577296A priority patent/JP7349514B2/ja
Priority to KR1020227002807A priority patent/KR102418213B1/ko
Priority to EP20868592.5A priority patent/EP4036443A4/en
Publication of WO2021057019A1 publication Critical patent/WO2021057019A1/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
    • F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of 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
    • 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

  • This application relates to the technical field of electronic expansion valves, and in particular to an electronic expansion valve.
  • the electronic expansion valve includes a housing and a guide sleeve, and the guide sleeve is arranged in the housing.
  • the electronic expansion valve is connected to the first pipe and the second pipe respectively, and the electronic expansion valve can be used to control the communication between the first pipe and the second pipe.
  • first the first pipe fitting and the second pipe fitting are welded to the shell by furnace welding, and then the guide sleeve is press-fitted into the shell.
  • the existing structure of the shell and the shell cannot meet the welding process requirements of furnace welding, and the guide sleeve can only be fixed on the shell by laser welding to complete the assembly process.
  • This application provides an electronic expansion valve to solve the problem of low coaxiality in the prior art.
  • the electronic expansion valve includes: a housing; a guide sleeve arranged in the housing; a rotor rotatably arranged in the housing; a screw arranged in the housing, and the rotor is connected to the Screw drive connection; the valve needle assembly is movably arranged in the housing, one end of the screw is connected with the valve needle assembly to drive the valve needle assembly to move axially through the screw; wherein, the inner wall of the housing and the outer wall of the guide sleeve are arranged between There are a guide section and a press-fitting section that communicate with each other.
  • the distance between the guide sleeve and the housing in the guide section is greater than the distance between the guide sleeve and the housing in the press-fit section, and the inner wall of the housing and the outer wall of the guide sleeve
  • a welding ring groove is also provided in the space, and the welding ring groove is communicated with the guide section.
  • the housing includes a sleeve and a valve seat, the guide sleeve is arranged in the valve seat, and the guide section and the press-fitting section are located between the guide sleeve and the valve seat.
  • valve seat has a mounting hole
  • guide sleeve is arranged in the mounting hole.
  • the mounting hole has a first section and a second section that are connected to each other.
  • the inner wall of the first section cooperates with the guide sleeve to form a guide section
  • the inner wall of the second section and The guide sleeve cooperates to form a press-fitting section.
  • a mounting boss is provided on the guide sleeve, the mounting boss is arranged along the circumferential direction of the side wall of the guide sleeve, and a guide section and a pressing section are formed between the side wall of the mounting boss and the inner wall of the mounting hole.
  • the mounting boss includes a third section and a fourth section, the third section is set corresponding to the first section, and the fourth section is set corresponding to the second section.
  • a welding ring groove is provided on the mounting boss, the welding ring groove is located between the third section and the fourth section, and the welding ring groove is arranged along the circumferential direction of the side wall of the mounting boss.
  • a limit boss is arranged in the mounting hole, and the limit boss is located on the side of the second section away from the first section. The limit boss cooperates with the installation boss to limit the displacement of the guide sleeve relative to the valve seat.
  • the electronic expansion valve further includes a nut assembly, a nut guide section is arranged on the guide sleeve, and the nut assembly is sleeved on the nut guide section.
  • the housing has an inlet hole and an outlet hole communicated with each other, the valve needle assembly is inserted in the guide sleeve, and the valve needle assembly is used to open or close the outlet hole.
  • the electronic expansion valve further includes: a first pipe member arranged in the inlet hole The inner part extends into the shell, and a limiting structure is arranged between the guide sleeve and the first pipe, and the limiting structure is used to limit the length of the first pipe extending into the shell.
  • a limiting boss is provided on the guide sleeve, and the limiting boss is provided corresponding to the end surface of the first pipe.
  • the limiting boss is annularly arranged along the circumferential direction of the guide sleeve.
  • the guide sleeve has a straight section, the limit boss is located above the straight section, the cross-sectional size of the straight section is smaller than the cross-sectional size of the limit boss, and there is a gap between the straight section and the end surface of the first pipe. interval.
  • a diversion structure is provided between the first pipe and the guide sleeve, and the diversion structure is used for circulating solder.
  • the end surface of the first pipe that extends into the housing is provided with a diversion groove.
  • the housing includes a sleeve and a valve seat that are connected to each other.
  • the valve seat includes a body and a mounting boss.
  • the mounting boss is provided at one end of the body away from the sleeve.
  • the mounting boss is provided with a valve port.
  • the electronic expansion valve is also It includes: a second pipe fitting sleeved on the mounting boss, a welding ring accommodating part is arranged between the inner wall of the second pipe fitting and the outer side wall of the mounting boss, and the welding ring accommodating part is used for placing the welding ring.
  • the welding ring receiving part is arranged on the mounting boss.
  • a receiving groove is provided on the outer side wall of the mounting boss, and the receiving groove is annularly arranged along the circumference of the mounting boss, and the receiving groove forms a welding ring receiving part.
  • the accommodating groove is located at an end of the mounting boss away from the body.
  • a diversion structure is provided between the second pipe and the mounting boss, and the diversion structure is used for circulating solder.
  • a diversion groove is provided on the inner wall of the second pipe.
  • the electronic expansion valve includes a housing, a guide sleeve, a rotor, a screw, and a valve needle assembly.
  • the guide sleeve is arranged in the housing.
  • a guide section and a press-fitting section that communicate with each other, and the distance between the guide sleeve and the housing in the guide section is greater than that of the guide sleeve and the housing in the press-fitting section. The spacing between.
  • a welding ring groove is also provided between the inner wall of the housing and the outer wall of the guide sleeve, and the welding ring groove is connected with the guide section to meet the welding process requirements of furnace welding.
  • the guide sleeve, the first pipe fitting and the second pipe fitting can be welded to the shell by means of integral furnace welding.
  • Figure 1 shows a schematic structural diagram of an electronic expansion valve provided by an embodiment of the present application
  • Figure 2 shows a cross-sectional view of the valve seat and the guide sleeve in Figure 1 after being press-fitted;
  • Fig. 3 shows a schematic diagram of the guide sleeve being guided by the guide section when the guide sleeve is placed in the valve seat in Fig. 1;
  • Fig. 4 shows a partial enlarged view at A in Fig. 3;
  • Fig. 5 shows a schematic diagram of the guide sleeve in Fig. 1 after being press-fitted to the press-fitting section;
  • Fig. 6 shows a partial enlarged view at B in Fig. 5;
  • FIG. 7 shows a schematic diagram of the structure of the guide sleeve in FIG. 1;
  • Figure 8 shows a schematic structural view of the valve seat in Figure 1;
  • Figure 9 shows a schematic structural diagram of an electronic expansion valve provided by another embodiment
  • Figure 10 shows an assembly diagram of the first pipe and the valve seat in Figure 9;
  • Fig. 11 shows a schematic structural view of the guide sleeve in Fig. 9;
  • Figure 12 shows a schematic structural diagram of an electronic expansion valve provided by another embodiment
  • Figure 13 shows a cross-sectional view of the second pipe and the valve seat in Figure 12;
  • Figure 14 shows the assembly diagram of the guide sleeve and the valve seat in Figure 12;
  • Figure 15 shows another assembly view of the guide sleeve and valve seat in Figure 12;
  • Figure 16 shows an assembly diagram of the second pipe and the valve seat in Figure 12;
  • Fig. 17 shows an assembly diagram of the first pipe and the valve seat in Fig. 12.
  • the first embodiment of the present application provides an electronic expansion valve, which includes a housing 10, a guide sleeve 20, a rotor 40, a screw 50, and a valve needle assembly 60.
  • the guide sleeve 20 and the screw 50 are both arranged in the housing 10.
  • the rotor 40 is rotatably arranged in the housing 10, and the rotor 40 is drivingly connected with the screw 50.
  • the valve needle assembly 60 is movably arranged in the housing 10. By connecting one end of the screw 50 with the valve needle assembly 60, the valve needle assembly 60 can be driven to move axially by the screw 50, so that the valve needle assembly 60 can be used for the valve The mouth is opened or blocked.
  • the inner wall of the housing 10 and the outer wall of the guide sleeve 20 are provided with a guide section and a press-fitting section that communicate with each other, and the distance between the guide sleeve 20 at the guide section and the housing 10 is greater than that of the guide at the press-fitting section.
  • the distance between the sleeve 20 and the housing 10, a welding ring groove 213 is also provided between the inner wall of the housing 10 and the outer wall of the guide sleeve 20, and the welding ring groove 213 is in communication with the guide section.
  • the welding ring groove 213 may be all arranged in the guide section, or the welding ring groove 213 may be partly arranged in the guide section and partly arranged in the press-fitting section.
  • the welding ring groove 213 is partly arranged in the guide section and partly arranged in the press-fitting section. This arrangement allows the solder to fully fill the gap and enhance the welding effect.
  • the distance between the guide sleeve 20 at the guide section and the housing 10 is greater than the distance between the guide sleeve 20 at the press-fitting section and the housing 10, including the following three structures:
  • a guide section can be formed between the inner wall of the housing 10 and the outer wall of the guide sleeve 20.
  • the interference fit can form a press fitting section between the inner wall of the housing 10 and the outer wall of the guide sleeve 20;
  • a guide section can be formed between the outer wall of the guide sleeve 20 and the inner wall of the housing 10.
  • the inner wall has an interference fit, so that a press-fitting section can be formed between the outer wall of the guide sleeve 20 and the inner wall of the housing 10;
  • the third structure simultaneously expands the inner diameter of a part of the inner wall of the housing 10 and reduces the outer diameter of a part of the outer wall of the guide sleeve 20, so that a guide section can be formed between the inner wall of the housing 10 and the outer wall of the guide sleeve 20.
  • the other part of the inner wall of 10 and the other part of the outer wall of the guide sleeve 20 are in interference fit, so that the inner wall of the housing 10 and the outer wall of the guide sleeve 20 can form a press-fitting section.
  • the first structure is adopted so that the distance between the guide sleeve 20 in the guide section and the housing 10 is greater than the distance between the guide sleeve 20 and the housing 10 in the press-fitting section.
  • the guide sleeve 20 when assembling the device, can be assembled with the housing 10 first.
  • the guide section can align the guide sleeve 20. Positioning and guiding are performed to facilitate the installation of the guide sleeve 20 into the casing 10, and the press-fitting section can realize the press-fitting of the guide sleeve and the casing.
  • the first pipe and the second pipe are connected to the housing 10 respectively. Since there is a gap between the guide sleeve 20 and the housing 10 in the guide section, the inner wall of the housing 10 and the outer wall of the guide sleeve 20 are different from each other.
  • a welding ring groove 213 is arranged between the welding ring grooves 213 and the guide section is connected to meet the welding process requirements of furnace welding.
  • the guide sleeve 20, the first pipe fitting and the second pipe fitting can be welded in an integrated manner by furnace welding. Welded to the housing 10. With the above structure, since the guide sleeve 20 is welded to the housing 10 by furnace welding, and the first pipe fitting and the second pipe fitting will not affect the pressing of the guide sleeve 20, the coaxiality of the guide sleeve 20 and the housing 10 can be ensured. degree.
  • the first pipe fitting, the second pipe fitting and the guide sleeve 20 are welded to the housing 10 by means of integrated furnace welding, which can simplify the processing technology and reduce the processing cost.
  • the guide sleeve 20 is welded to the housing 10 by laser welding in the prior art, since there will be multiple welding points between the guide sleeve 20 and the housing 10, the welding process itself cannot guarantee the guide sleeve 20 and the housing 10 The coaxiality of the body 10.
  • the guide sleeve 20 is welded to the housing 10 by furnace welding, and the welding process will not affect the coaxiality of the guide sleeve 20 and the housing 10, so that the accuracy of the device can be improved, and the electronic expansion valve can be improved.
  • the sealing performance is not affect the coaxiality of the guide sleeve 20 and the housing 10, so that the accuracy of the device can be improved, and the electronic expansion valve can be improved.
  • the housing 10 includes a sleeve 11 and a valve seat 12, a guide sleeve 20 is arranged in the valve seat 12, and the guide section and the press-fitting section are located between the guide sleeve 20 and the valve seat 12.
  • the first pipe and the second pipe are both connected with the valve seat 12.
  • the valve seat 12 has a mounting hole 121, the guide sleeve 20 is disposed in the mounting hole 121, and the mounting hole 121 has a first section 121a and a second section 121b that are connected to each other.
  • the inner wall of the first section 121a cooperates with the guide sleeve 20 to form a guide section
  • the inner wall of the second section 121b cooperates with the guide sleeve 20 to form a press fitting section
  • the first section 121a is located above the second section 121b.
  • the first section 121a may be located below the second section 121b.
  • the aperture of the first section 121a is larger than the aperture of the second section 121b, so that the distance between the guide sleeve 20 in the guide section and the housing 10 is greater than the distance between the guide sleeve 20 and the housing 10 in the press-fitting section.
  • the spacing between. Specifically, the aperture of the first section 121a is 0.02 mm to 0.08 mm larger than the aperture of the second section 121b.
  • the distance between the guide sleeve 20 and the first section 121a is 0.01 mm to 0.04 mm, and the guide sleeve 20 and the second section 121b have an interference fit.
  • the guide sleeve 20 is provided with a mounting boss 21, the mounting boss 21 is arranged along the circumferential direction of the side wall of the guide sleeve 20, a guide section and a pressing section are formed between the side wall of the mounting boss 21 and the inner wall of the mounting hole 121 .
  • a guide section and a pressing section are formed between the side wall of the mounting boss 21 and the inner walls of the first section 121a and the second section 121b of the mounting hole 121.
  • the mounting boss 21 includes a third section 211 and a fourth section 212, the third section 211 is set corresponding to the first section 121a, and the fourth section 212 is set corresponding to the second section 121b. Among them, the third section 211 is located above the fourth section 212.
  • the cross-sectional size of the third section 211 is equal to the cross-sectional size of the fourth section 212.
  • the mounting boss 21 is provided with a welding ring groove 213, the welding ring groove 213 is located between the third section 211 and the fourth section 212, and the welding ring groove 213 is along the circumferential direction of the side wall of the mounting boss 21 Set up. Specifically, one end of the welding ring groove 213 is connected to the third section 211, and the other end of the welding ring groove 213 is connected to the fourth section 212. With the above structure, the welding ring can be placed in the welding ring groove 213, so that the connection between the guide sleeve 20 and the housing 10 can be completed by furnace welding.
  • a limiting boss 121c is provided in the mounting hole 121, and the limiting boss 121c is located on the side of the second section 121b away from the first section 121a. Specifically, one end of the limiting boss 121c is connected to the second section 121b.
  • the electronic expansion valve further includes a nut assembly 30, a nut guide section 22 is provided on the guide sleeve 20, and the nut assembly 30 is sleeved on the nut guide section 22.
  • the nut guide section 22 is connected to the mounting boss 21 and is located above the mounting boss 21.
  • the second embodiment of the present application provides an electronic expansion valve.
  • the difference between the electronic expansion valve provided by this embodiment and the first embodiment is that, in this embodiment, the cross-sectional size of the third section 211 is smaller or larger than that of the fourth embodiment.
  • the cross-sectional size of the third section 211 is smaller than the cross-sectional size of the fourth section 212, a guide section is formed between the third section 211 and the inner wall of the mounting hole 121, and a press fit is formed between the fourth section 212 and the inner wall of the mounting hole 121 Section, so that the distance between the guide sleeve 20 at the guide section and the housing 10 is greater than the distance between the guide sleeve 20 at the press-fitting section and the housing 10.
  • the third section 211 is located above the fourth section 212. In other embodiments, the third section 211 may be located below the fourth section 212.
  • the cross-sectional size of the third section 211 is smaller than the cross-sectional size of the fourth section 212 by 0.02 mm to 0.08 mm.
  • the distance between the inner wall of the mounting hole 121 and the third section 211 is 0.01 mm to 0.04 mm, and the inner wall of the mounting hole 121 and the fourth section 212 have an interference fit.
  • the apertures of the first section 121a and the second section 121b of the mounting hole 121 are equal.
  • the third embodiment of the present application provides an electronic expansion valve.
  • the electronic expansion valve provided by this embodiment differs in that, in this embodiment, the aperture of the first section 121a is larger than that of the second section 121b.
  • the section size of the third section 211 is smaller than the section size of the fourth section 212
  • the inner wall of the first section 121a and the outer wall of the third section 211 form a guiding section
  • a press-fitting section is formed therebetween, so that the distance between the guide sleeve 20 in the guide section and the housing 10 is greater than the distance between the guide sleeve 20 and the housing 10 in the press-fit section.
  • the first section 121a is located above the second section 121b, and the third section 211 is located above the fourth section 212. In other embodiments, the first section 121a may be disposed below the second section 121b, and the third section 211 may be disposed below the fourth section 212.
  • the guide sleeve 20 When the guide sleeve 20 is press-fitted with the housing 10, the guide sleeve 20 can be positioned through the guide section, which is convenient for press-fitting;
  • the material of the valve seat 12 and the guide sleeve 20 can be sus303, which can reduce the difficulty and cost of trial production of both.
  • the valve seat 12 and the guide sleeve 20 are welded by laser welding, a stainless steel material with higher strength is required, and the cost is higher.
  • the electronic expansion valve in the prior art includes a housing, a first pipe and a second pipe.
  • the housing is provided with an inlet and an outlet communicating with each other.
  • the first pipe is arranged in the inlet and partially extends into the housing.
  • the refrigerant The first pipe can enter the housing from the inlet hole, and the second pipe is arranged corresponding to the outlet hole.
  • a necking section is provided at the end of the first tube close to the inlet hole. By controlling the length of the necking section, the length of the first tube extending into the shell can be limited. .
  • the prior art it is difficult to guarantee the length of the necked section, and it is impossible to precisely control the length of the first pipe that extends into the housing.
  • the necking of the first pipe will increase the flow resistance of the first pipe and affect the use of the electronic expansion valve. Therefore, the prior art has the problem that it cannot meet the usage requirements.
  • the housing 10 has an inlet hole and an outlet hole communicating with each other
  • the valve needle assembly 60 is inserted in the guide sleeve 20
  • the valve needle assembly 60 is used for For opening or closing the outlet hole
  • the electronic expansion valve further includes: a first pipe 70 arranged in the inlet hole and partially extending into the housing 10, a limit structure 80 is arranged between the guide sleeve 20 and the first pipe 70, and the position limit The structure 80 is used to limit the length of the first pipe 70 extending into the housing 10 to prevent the first pipe 70 from excessively extending into the housing 10.
  • the limiting structure 80 can be provided on the guide sleeve 20, or on the first pipe 70, or on the guide sleeve 20 and the first pipe 70 at the same time.
  • the limit structure 80 can be used to limit the length of the first pipe 70 extending into the housing 10, so there is no need
  • the limit structure 80 can be used to precisely control the length of the first pipe 70 extending into the housing 10 without increasing the flow resistance of the first pipe 70, thereby satisfying usage requirements.
  • the processing cost can be reduced.
  • a limiting boss 23 is provided on the guide sleeve 20, the limiting boss 23 is provided corresponding to the end surface of the first pipe 70, and the limiting boss 23 forms a limiting structure 80.
  • the end surface of the first tube 70 will abut the limiting boss 23, so that the limiting boss 23 can be used to restrict the first tube 70 from continuing to face the shell.
  • the body 10 moves.
  • a limiting boss may be provided on the end surface of the first tube 70 so that the limiting boss is higher than the end surface of the first tube 70, which can also play a limiting role.
  • the limiting boss 23 is annularly arranged along the circumferential direction of the guide sleeve 20.
  • the limiting boss 23 is located above the axis of the first pipe 70. Specifically, the lower end surface of the limiting boss 23 is located above the axis of the first pipe 70. In this embodiment, the lower end surface of the limiting boss 23 is flush with the inner wall of the first pipe 70, so that while the limiting boss 23 is used to limit the first pipe 70, the refrigerant can be ensured to the utmost extent. Circulation capacity.
  • the guide sleeve 20 has a straight section 24, the limiting boss 23 is located above the straight section 24, and the cross-sectional size of the straight section 24 is smaller than the cross-sectional size of the limiting boss 23. Specifically, there is an interval between the straight section 24 and the end surface of the first pipe 70, so that the resistance of the guide sleeve 20 to the first pipe 70 entering the refrigerant can be reduced, and the flow capacity is stronger.
  • a diversion structure is provided between the first pipe 70 and the guide sleeve 20.
  • the diversion structure is used to circulate the solder, which can improve the welding effect and is convenient Check the welding quality.
  • the end surface of the first pipe 70 that extends into the housing 10 is provided with a diversion groove, and the diversion groove forms a diversion structure.
  • embossing can also be provided on the end surface of the first pipe 70, and the embossing is used to divert the solder.
  • the first pipe is provided with a necking structure, when the first pipe is welded to the housing 10, the flow of the solder can only be observed outside the first pipe, and the welding effect cannot be accurately judged.
  • the first pipe 70 is a straight pipe, the flow of solder can be observed at the outside of the first pipe 70 and the nozzle of the first pipe 70 at the same time, so that the welding effect can be accurately judged and the welding quality can be improved.
  • the housing 10 includes a sleeve 11 and a valve seat 12, the guide sleeve 20 is arranged in the valve seat 12, the inlet hole is arranged on the side wall of the valve seat 12, and the first pipe 70 penetrates the valve seat 12. Among them, the outlet hole is also provided on the valve seat 12.
  • the outlet hole is set corresponding to the valve port.
  • the first pipe 70 and the housing 10 can be welded by means of integrated furnace welding.
  • the limiting boss 23 can be used to limit the length of the first pipe 70 extending into the housing 10, without the need to shrink the first pipe 70, which can reduce cost;
  • the turning amount of the guide sleeve 20 is relatively small, which can improve the processing efficiency and the service life of the tool, and can reduce the cost;
  • the second pipe in order to connect the second pipe to the housing, the second pipe is first sleeved on the mounting boss, and then a welding ring is sleeved on the outside of the second pipe, and the connection is completed by welding.
  • the welding quality can be inspected through the nozzle of the second pipe that is far from the welding end.
  • employees cannot inspect the welding quality. Therefore, the prior art has a problem that it is difficult to detect the welding quality.
  • the housing 10 includes a sleeve 11 and a valve seat 12 that are connected to each other.
  • the valve seat 12 includes a body 122 and a mounting boss 123.
  • the mounting boss 123 is arranged on the end of the body 122 away from the sleeve 11, the mounting boss 123 is provided with a valve port,
  • the electronic expansion valve further includes: a second pipe 90 sleeved on the mounting boss 123, the inner wall of the second pipe 90 and A welding ring accommodating part 100 is provided between the outer side walls of the mounting boss 123, and the welding ring accommodating part 100 is used for placing the welding ring 110.
  • the welding ring accommodating part 100 can be arranged on the inner wall of the second pipe 90 or on the outer side wall of the mounting boss 123, or on the inner wall of the second pipe 90 and the outer side wall of the mounting boss 123 at the same time.
  • the welding ring 110 is arranged inside the second pipe 90, when welding the second pipe 90, by observing whether there is solder from the second pipe 90 and the valve from the outside of the second pipe 90 Leaking between the seats 12 can accurately judge the welding quality, which is convenient for employees to detect.
  • the judgment of the welding quality is not limited by the tube type of the second pipe 90, and can be used for the judgment of the bent pipe. Since less solder accumulates on the outside of the second pipe 90 after welding, the positioning and press-fitting after the device can be effectively ensured.
  • the welding ring receiving part 100 is provided on the mounting boss 123.
  • the welding ring accommodating part 100 can be arranged in the middle of the mounting boss 123, and can also be arranged at both ends of the mounting boss 123.
  • a receiving groove 123 a is provided on the outer side wall of the mounting boss 123, the receiving groove 123 a is annularly arranged along the circumference of the mounting boss 123, and the receiving groove 123 a forms the welding ring receiving part 100.
  • the accommodating groove 123a can be arranged in the middle of the mounting boss 123 or at both ends of the mounting boss 123, and arranging the accommodating groove 123a has the advantage of facilitating processing.
  • the receiving groove 123a is located at an end of the mounting boss 123 away from the main body 122.
  • the receiving groove 123a can be formed by turning the end of the mounting boss 123 away from the main body 122, which can further reduce the processing cost and facilitate the placement of the welding ring 110.
  • a diversion structure is provided between the second pipe 90 and the mounting boss 123.
  • the diversion structure is used to circulate the solder, which can improve the welding effect. And it is convenient to inspect the welding quality.
  • a diversion groove is provided on the inner wall of the second pipe 90, and the diversion groove forms a diversion structure.
  • embossing can also be provided on the end surface of the second pipe 90, and the embossing is used to divert the solder.

Abstract

一种电子膨胀阀，包括：壳体(10)；导向套(20)和螺杆(50)，设置在壳体(10)内；转子(40)，可转动地设置在壳体(10)内；转子(40)与螺杆(50)驱动连接；阀针组件(60)，可移动地设置在壳体(10)内，螺杆(50)的一端与阀针组件(60)连接，以通过螺杆(50)带动阀针组件(60)轴向移动；壳体(10)的内壁与导向套(20)的外壁之间设置有相互连通的导向段和压装段，位于导向段的导向套(20)与壳体(10)之间的间距大于位于压装段的导向套(20)与壳体(10)之间的间距，壳体(10)的内壁与导向套(20)的外壁之间还设置有焊环槽(213)，焊环槽(213)与导向段连通。该电子膨胀阀能够解决现有技术中的同轴度低的问题。

Description

电子膨胀阀 技术领域
本申请涉及电子膨胀阀技术领域，具体而言，涉及一种电子膨胀阀。
背景技术
目前，电子膨胀阀包括壳体和导向套，导向套设置在壳体内。其中，电子膨胀阀分别与第一管件和第二管件连接，可以利用电子膨胀阀控制第一管件和第二管件的连通情况。
在对电子膨胀阀与第一管件和第二管件进行装配时，首先将第一管件和第二管件通过炉焊的方式焊接到壳体上，然后将导向套压装至壳体内，由于导向套和壳体的现有结构无法满足炉焊的焊接工艺要求，只能通过激光焊接的方式将导向套固定在壳体上，从而完成装配过程。
但是，在现有技术中，将第一管件和第二管件焊接到壳体上之后，再将导向套压装至壳体内时，第一管件和第二管件会影响导向套的压装，且导向套与阀座激光焊接时易出现单边翘起情况，导致导向套和壳体的同轴度难以得到保证。因此，现有技术中存在同轴度低的问题。
发明内容
本申请提供一种电子膨胀阀，以解决现有技术中的同轴度低的问题。
为了解决上述问题，本申请提供了一种电子膨胀阀，电子膨胀阀包括：壳体；导向套，设置在壳体内；转子，可转动地设置在壳体内；螺杆，设置在壳体内，转子与螺杆驱动连接；阀针组件，可移动地设置在壳体内，螺杆的一端与阀针组件连接，以通过螺杆带动阀针组件轴向移动；其中，壳体的内壁与导向套的外壁之间设置有相互连通的导向段和压装段，位于导向段的导向套与壳体之间的间距大于位于压装段的导向套与壳体之间的间距，壳体的内壁与导向套的外壁之间还设置有焊环槽，焊环槽与导向段连通。
进一步地，壳体包括套管和阀座，导向套设置在阀座内，导向段和压装段位于导向套与阀座之间。
进一步地，阀座具有安装孔，导向套设置在安装孔内，安装孔具有相互连接的第一段和第二段，第一段的内壁与导向套配合形成导向段，第二段的内壁与导向套配合形成压装段。
进一步地，导向套上设置有安装凸台，安装凸台沿导向套的侧壁周向设置，安装凸台的侧壁与安装孔的内壁之间形成导向段和压装段。
进一步地，安装凸台包括第三段和第四段，第三段对应第一段设置，第四段对应第二段设置。
进一步地，安装凸台上设置有焊环槽，焊环槽位于第三段与第四段之间，焊环槽沿安装凸台的侧壁周向设置。
进一步地，安装孔内设置有限位凸台，限位凸台位于第二段的远离第一段的一侧，限位凸台与安装凸台相配合，以限制导向套相对阀座的位移。
进一步地，电子膨胀阀还包括螺母组件，导向套上设置有螺母导向段，螺母组件套设在螺母导向段上。
进一步地，壳体具有相互连通的进孔和出孔，阀针组件穿设在导向套内，阀针组件用于打开或关闭出孔，电子膨胀阀还包括：第一管件，设置在进孔内并部分伸入壳体内，导向套与第一管件之间设置有限位结构，限位结构用于限制第一管件伸入壳体的长度尺寸。
进一步地，导向套上设置有限位凸台，限位凸台对应第一管件的端面设置。
进一步地，限位凸台沿导向套的周向环形设置。
进一步地，导向套具有平直段，限位凸台位于平直段的上方，平直段的横截面尺寸小于限位凸台的横截面尺寸，平直段与第一管件的端面之间具有间隔。
进一步地，第一管件与导向套之间设置有导流结构，导流结构用于流通焊料。
进一步地，第一管件的伸入壳体的端面上设置有导流槽。
进一步地，壳体包括相互连接的套管和阀座，阀座包括本体和安装凸台，安装凸台设置在本体的远离套管的一端，安装凸台上设置有阀口，电子膨胀阀还包括：第二管件，套设在安装凸台上，第二管件的内壁与安装凸台的外侧壁之间设置有焊环容纳部，焊环容纳部用于放置焊环。
进一步地，焊环容纳部设置在安装凸台上。
进一步地，安装凸台的外侧壁上设置有容纳槽，容纳槽沿安装凸台的周向环形设置，容纳槽形成焊环容纳部。
进一步地，容纳槽位于安装凸台的远离本体的一端。
进一步地，第二管件与安装凸台之间设置有导流结构，导流结构用于流通焊料。
进一步地，第二管件的内壁上设置有导流槽。
应用本申请的技术方案，该电子膨胀阀包括壳体、导向套、转子、螺杆以及阀针组件。其中，导向套设置在壳体内。其中，壳体的内壁与导向套的外壁之间设置有相互连通的导向段和压装段，且位于导向段的导向套与壳体之间的间距大于位于压装段的导向套与壳体之间的间距。由于位于导向段的导向套与壳体之间存在间隙，壳体的内壁与导向套的外壁之间还 设置有焊环槽，且焊环槽与导向段连通，满足炉焊的焊接工艺要求，可以通过炉焊的方式将导向套、第一管件以及第二管件通过一体炉焊的方式焊接至壳体上。采用上述结构，由于导向套通过一体炉焊的方式焊接至壳体上，且第一管件和第二管件不会影响导向套的压装，从而能够保证导向套与壳体的同轴度。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了本申请实施例提供的电子膨胀阀的结构示意图；
图2示出了图1中阀座与导向套压装后的剖视图；
图3示出了图1中将导向套放入阀座时导向段对导向套进行导向的示意图；
图4示出了图3中A处的局部放大图；
图5示出了图1中将导向套压装至压装段后的示意图；
图6示出了图5中B处的局部放大图；
图7示出了图1中的导向套的结构示意图；
图8示出了图1中的阀座的结构示意图；
图9示出了另一实施例提供的电子膨胀阀的结构示意图；
图10示出了图9中的第一管件与阀座的装配图；
图11示出了图9中的导向套的结构示意图；
图12示出了又一实施例提供的电子膨胀阀的结构示意图；
图13示出了图12中的第二管件与阀座的剖视图；
图14示出了图12中的导向套与阀座的装配图；
图15示出了图12中的导向套与阀座的又一装配图；
图16示出了图12中的第二管件与阀座的装配图；
图17示出了图12中的第一管件与阀座的装配图。
其中，上述附图包括以下附图标记：
10、壳体；11、套管；12、阀座；121、安装孔；121a、第一段；121b、第二段；121c、限位凸台；122、本体；123、安装凸台；123a、容纳槽；20、导向套；21、安装凸台；211、第三段；212、第四段；213、焊环槽；22、螺母导向段；23、限位凸台；24、平直段；30、 螺母组件；40、转子；50、螺杆；60、阀针组件；70、第一管件；80、限位结构；90、第二管件；100、焊环容纳部；110、焊环。
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。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。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。
如附图所示，本申请的实施例一提供了一种电子膨胀阀，该电子膨胀阀包括壳体10、导向套20、转子40、螺杆50以及阀针组件60。其中，导向套20和螺杆50均设置在壳体10内。具体的，转子40可转动地设置在壳体10内，转子40与螺杆50驱动连接。其中，阀针组件60可移动地设置在壳体10内，通过将螺杆50的一端与阀针组件60连接，可以通过螺杆50带动阀针组件60轴向移动，从而利用阀针组件60对阀口进行开启或封堵。其中，壳体10的内壁与导向套20的外壁之间设置有相互连通的导向段和压装段，且位于导向段的导向套20与壳体10之间的间距大于位于压装段的导向套20与壳体10之间的间距，壳体10的内壁与导向套20的外壁之间还设置有焊环槽213，且焊环槽213与导向段连通。其中，可以将焊环槽213全部设置在导向段内，也可以将焊环槽213部分设置在导向段内，部分设置在压装段内。在本实施例中，焊环槽213部分设置在导向段内，部分设置在压装段内，如此设置，可以使焊料充分将缝隙填满，能够提升焊接效果。
其中，位于导向段的导向套20与壳体10之间的间距大于位于压装段的导向套20与壳体10之间的间距，包括以下三种结构：
第一种结构，通过扩大壳体10的一部分内壁的内径，可以使壳体10的内壁与导向套20的外壁之间形成导向段，通过使壳体10的另一部分内壁与导向套20的外壁过盈配合，可以使壳体10的内壁与导向套20的外壁之间形成压装段；
第二种结构，通过缩小导向套20的一部分外壁的外径，可以使导向套20的外壁与壳体10的内壁之间形成导向段，通过使导向套20的另一部分外壁与壳体10的内壁过盈配合，可以使导向套20的外壁与壳体10的内壁之间形成压装段；
第三种结构，同时扩大壳体10的一部分内壁的内径和缩小导向套20的一部分外壁的外径，可以使壳体10的内壁与导向套20的外壁之间形成导向段，通过使壳体10的另一部分内壁与导向套20的另一部分外壁过盈配合，可以使壳体10的内壁与导向套20的外壁之间形成压装段。
在本实施例中，采用第一种结构，以使位于导向段的导向套20与壳体10之间的间距大于位于压装段的导向套20与壳体10之间的间距。
应用本实施例提供的电子膨胀阀，在对装置进行装配时，可以先将导向套20与壳体10进行装配，当将导向套20压装至壳体10时，导向段可以对导向套20进行定位和导向，以便于将导向套20装入壳体10内，压装段可以实现导向套与壳体的压装。压装完成之后，再将第一管件和第二管件分别与壳体10连接，由于位于导向段的导向套20与壳体10之间存在间隙，壳体10的内壁与导向套20的外壁之间设置有焊环槽213，且焊环槽213与导向段连通，满足炉焊的焊接工艺要求，可以通过炉焊的方式将导向套20、第一管件以及第二管件通过一体炉焊的方式焊接至壳体10上。采用上述结构，由于导向套20通过炉焊的方式焊接至壳体10上，且第一管件和第二管件不会影响导向套20的压装，能够保证导向套20与壳体10的同轴度。
并且，由于激光焊接的工艺复杂，成本较高，利用一体炉焊的方式将第一管件、第二管件以及导向套20焊接到壳体10上，可以简化加工工艺，降低加工成本。具体的，现有技术中采用激光焊接的方式将导向套20焊接到壳体10上时，由于导向套20与壳体10会存在多个焊点，焊接工艺本身就无法保证导向套20与壳体10的同轴度。在本实施例中，采用炉焊的方式将导向套20焊接到壳体10上，焊接工艺不会影响导向套20与壳体10的同轴度，如此可以提升装置的精度，提升电子膨胀阀的密封性能。
具体的，壳体10包括套管11和阀座12，导向套20设置在阀座12内，导向段和压装段位于导向套20与阀座12之间。其中，第一管件和第二管件均与阀座12连接。
其中，阀座12具有安装孔121，导向套20设置在安装孔121内，安装孔121具有相互连接的第一段121a和第二段121b。在本实施例中，第一段121a的内壁与导向套20配合形成导向段，第二段121b的内壁与导向套20配合形成压装段，且第一段121a位于第二段121b的上方。在其他实施例中，第一段121a可以位于第二段121b的下方。
在本实施例中，第一段121a的孔径大于第二段121b的孔径，以使位于导向段的导向套20与壳体10之间的间距大于位于压装段的导向套20与壳体10之间的间距。具体的，第一段121a的孔径比第二段121b的孔径大0.02mm至0.08mm。采用上述结构，导向套20与第一段121a的间距为0.01mm至0.04mm，导向套20与第二段121b为过盈配合。
其中，导向套20上设置有安装凸台21，安装凸台21沿导向套20的侧壁周向设置，安装凸台21的侧壁与安装孔121的内壁之间形成导向段和压装段。具体的，安装凸台21的侧壁与安装孔121的第一段121a和第二段121b的内壁之间形成导向段和压装段。
具体的，安装凸台21包括第三段211和第四段212，第三段211对应第一段121a设置，第四段212对应第二段121b设置。其中，第三段211位于第四段212上方。
在本实施例中，第三段211的截面尺寸等于第四段212的截面尺寸。
在本实施例中，安装凸台21上设置有焊环槽213，焊环槽213位于第三段211与第四段212之间，且焊环槽213沿安装凸台21的侧壁周向设置。具体的，焊环槽213的一端与第三 段211连接，焊环槽213的另一端与第四段212连接。采用上述结构，可以利用焊环槽213放置焊环，以便于利用炉焊的方式完成导向套20与壳体10的连接。
其中，安装孔121内设置有限位凸台121c，限位凸台121c位于第二段121b的远离第一段121a的一侧。具体的，限位凸台121c的一端与第二段121b连接。通过使限位凸台121c与安装凸台21相配合，可以限制导向套20相对阀座12的位移，以避免导向套20过度深入安装孔121内。
在本实施例中，电子膨胀阀还包括螺母组件30，导向套20上设置有螺母导向段22，螺母组件30套设在螺母导向段22上。具体的，螺母导向段22与安装凸台21连接，且位于安装凸台21的上方。当完成导向套20与壳体10的焊接后，可以将螺母组件30压装到导向套20的螺母导向段22上，在压装的过程中，螺母导向段22可以对螺母组件30起到定位和导向的作用。
实施例一提供的装置的装配步骤为：
(1)将导向套20放入阀座12内，导向套20的第四段212与阀座12的第一段121a间隙配合，能够对导向套20起到定位和导向的作用；
(2)压装导向套20，使安装凸台21的下表面与限位凸台121c的台阶面接触，导向套20的第四段212与阀座12的第二段121b紧配。此时，导向套20的第三段211与阀座12的第一段121a之间存在单边0.01mm至0.04mm的缝隙作为焊缝，且焊环槽213内放置有焊环；
(3)将第一管件和第二管件装配到阀座12上，采用一体炉焊的方式，将第一管件、第二管件以及导向套20与阀座12焊接到一起。
本申请实施例二提供了一种电子膨胀阀，本实施例提供的电子膨胀阀与实施例一相比，其区别在于，在本实施例中，第三段211的截面尺寸小于或大于第四段212的截面尺寸。具体的，第三段211的截面尺寸小于第四段212的截面尺寸，第三段211与安装孔121的内壁之间形成导向段，第四段212与安装孔121的内壁之间形成压装段，以使位于导向段的导向套20与壳体10之间的间距大于位于压装段的导向套20与壳体10之间的间距。在本实施例中，第三段211位于第四段212上方。在其它实施例中，第三段211可以位于第四段212下方。
具体的，第三段211的截面尺寸比第四段212的截面尺寸小0.02mm至0.08mm。采用上述结构，安装孔121的内壁与第三段211的间距为0.01mm至0.04mm，安装孔121的内壁与第四段212为过盈配合。其中，安装孔121的第一段121a和第二段121b的孔径相等。
本申请实施例三提供了一种电子膨胀阀，本实施例提供的电子膨胀阀与实施例一相比，其区别在于，在本实施例中，第一段121a的孔径大于第二段121b的孔径，第三段211的截面尺寸小于第四段212的截面尺寸，第一段121a的内壁与第三段211的外壁之间形成导向段，第二段121b的内壁与第四段212的外壁之间形成压装段，以使位于导向段的导向套20与壳体10之间的间距大于位于压装段的导向套20与壳体10之间的间距。在本实施例中，第一段 121a位于第二段121b的上方，第三段211位于第四段212上方。在其它实施例中，可以将第一段121a设置在第二段121b的下方，将第三段211设置在第四段212的下方。
通过上述实施例提供的装置，具有以下有益效果：
(1)导向套20与壳体10压装时可通过导向段对导向套20进行定位，压装便捷；
(2)将导向套20压装至壳体10内之后，将第一管件和第二管件装配至壳体10上，再通过一体炉焊的方式对装配有第一管件、第二管件和导向套20的壳体10进行焊接，具有工艺简单稳定，可有效保证导向套和阀体同轴度的优点；
(3)一体炉焊后，可通过导向段观察焊接质量，若有焊料渗出，说明焊缝被填满，则判定焊接方法可靠且高效；
(4)由于采用炉焊的方式，阀座12和导向套20的材质都可选用sus303，能够降低两者的试制难度及成本。而现有技术中，由于阀座12和导向套20采用激光焊的方式进行焊接，需采用强度更高的不锈钢材质，成本较高。
现有技术中的电子膨胀阀包括壳体、第一管件以及第二管件，壳体上设置有相互连通的进孔和出孔，第一管件设置在进孔内并部分伸入壳体内，冷媒可通过第一管件从进孔进入壳体内，第二管件对应出孔设置。为了限制第一管件伸入壳体的长度尺寸，在第一管件的靠近进孔的一端设置有缩颈段，通过控制缩颈段的长度尺寸，可以限制第一管件伸入壳体的长度尺寸。但是，在现有技术中，缩颈段的长度尺寸难以保证，无法精确控制第一管件的伸入壳体的长度尺寸。并且，对第一管件进行缩口，还会增加第一管件的流阻，影响电子膨胀阀的使用。因此，现有技术存在无法满足使用需求的问题。
为了解决上述问题，在另一实施例中，与上述实施例不同的是，壳体10具有相互连通的进孔和出孔，阀针组件60穿设在导向套20内，阀针组件60用于打开或关闭出孔，电子膨胀阀还包括：第一管件70，设置在进孔内并部分伸入壳体10内，导向套20与第一管件70之间设置有限位结构80，限位结构80用于限制第一管件70伸入壳体10的长度尺寸，以避免第一管件70过度伸入壳体10内。其中，限位结构80可以设置在导向套20上，或设置在第一管件70上，或同时设置在导向套20和第一管件70上。
应用本实施例提供的电子膨胀阀，通过在导向套20与第一管件70之间设置限位结构80，可以利用限位结构80限制第一管件70伸入壳体10的长度尺寸，如此无需对第一管件70进行缩口，利用限位结构80即可精确地控制第一管件70伸入壳体10的长度尺寸，并且不会增加第一管件70的流阻，进而能够满足使用需求。并且，由于第一管件70无需缩口，能够降低加工成本。
在本实施例中，导向套20上设置有限位凸台23，限位凸台23对应第一管件70的端面设置，限位凸台23形成限位结构80。当第一管件70伸入壳体10的长度达到预设尺寸时，第一管件70的端面会与限位凸台23抵接，从而可以利用限位凸台23限制第一管件70继续相对 壳体10移动。在其它实施例中，可以在第一管件70的端面设置限位凸台，使限位凸台高于第一管件70的端面，同样能够起到限位作用。
具体的，限位凸台23沿导向套20的周向环形设置。采用上述结构，能够减少导向套20的车削量，可以提升加工效率和刀具的使用寿命，并降低成本。
为了避免限位凸台23阻挡冷媒流动，限位凸台23位于第一管件70的轴线上方。具体的，限位凸台23的下端面位于第一管件70的轴线上方。在本实施例中，限位凸台23的下端面与第一管件70的内壁相平齐，如此能够在利用限位凸台23对第一管件70进行限位的同时，最大限度地保证冷媒的流通能力。
在本实施例中，导向套20具有平直段24，限位凸台23位于平直段24的上方，且平直段24的横截面尺寸小于限位凸台23的横截面尺寸。具体的，平直段24与第一管件70的端面之间具有间隔，如此可减少导向套20对第一管件70进入冷媒的阻力，流通能力更强。
为了焊料能够顺利地在第一管件70与导向套20之间流动，第一管件70与导向套20之间设置有导流结构，导流结构用于流通焊料，如此能够提升焊接效果，且便于对焊接质量进行检测。
在本实施例中，第一管件70的伸入壳体10的端面上设置有导流槽，导流槽形成导流结构。其中，还可以在第一管件70的端面上设置压花，利用压花对焊料进行导流。
并且，由于在现有技术中，第一管件设置有缩口结构，当对第一管件与壳体10进行焊接时，只能在第一管件的外部观察焊料的流动情况，无法准确判断焊接效果。在本实施例中，由于第一管件70为直管，可以同时在第一管件70的外部和第一管件70的管口观察焊料的流动情况，进而能够准确判断焊接效果，能够提升焊接质量。
具体的，壳体10包括套管11和阀座12，导向套20设置在阀座12内，进孔设置在阀座12的侧壁上，第一管件70穿设在阀座12上。其中，出孔也设置在阀座12上。
在本实施例中，出孔对应阀口设置。
在本实施例中，可以通过一体炉焊的方式对第一管件70和壳体10进行焊接。
通过本实施例提供的装置，具有以下有益效果：
(1)通过在导向套20上设置限位凸台23，可以利用限位凸台23限制第一管件70的伸入壳体10的长度尺寸，无需对第一管件70进行缩口，能够降低成本；
(2)由于第一管件无需缩口，能够降低流阻，提升流通能力；
(3)导向套20的车削量相对较少，能够提升加工效率和刀具的使用寿命，可以降低成本；
(4)导向套20的限位凸台23和平直段24存在直径差，可减少导向套20对第一管件70进入冷媒的阻力，能够进一步流通能力；
(5)可以同时第一管件70的外部和第一管件70的管口观察焊料的流动情况，进而能够准确判断焊接效果，能够提升焊接质量。
在现有技术中，为了将第二管件与壳体进行连接，首先将第二管件套设在安装凸台上，然后在第二管件的外侧套设焊环，利用焊接的方式完成连接。在进行焊接时，可以通过第二管件的远离焊接端的管口检测焊接质量。但是，在现有技术中，员工难以从远离焊接端的管口准确判断焊接端的焊接质量。并且，当第二管件为弯管时，员工无法对焊接质量进行检测。因此，现有技术存在难以检测焊接质量的问题。
为了解决上述问题，在另一实施例中，与实施例一不同的是，壳体10包括相互连接的套管11和阀座12，阀座12包括本体122和安装凸台123，安装凸台123设置在本体122的远离套管11的一端，安装凸台123上设置有阀口，电子膨胀阀还包括：第二管件90，套设在安装凸台123上，第二管件90的内壁与安装凸台123的外侧壁之间设置有焊环容纳部100，焊环容纳部100用于放置焊环110。其中，焊环容纳部100可设置在第二管件90的内壁上，或设置在安装凸台123的外侧壁上，或同时设置在第二管件90的内壁和安装凸台123的外侧壁上。
应用本实施例提供的电子膨胀阀，由于焊环110设置在第二管件90内部，在对第二管件90进行焊接时，通过在第二管件90外部观察是否有焊料从第二管件90与阀座12之间漏出，即可对焊接质量进行准确判断，便于员工进行检测。并且，焊接质量的判断不受第二管件90的管型限制，可用于对弯管的判断。由于焊接后第二管件90的外部堆积的焊料较少，可有效确保装置后的定位与压装。
在本实施例中，焊环容纳部100设置在安装凸台123上。其中，焊环容纳部100可设置在安装凸台123的中部，也可设置在安装凸台123的两端。通过将焊环容纳部100设置在安装凸台123上，便于对焊环容纳部100进行加工，能够降低加工成本。
具体的，安装凸台123的外侧壁上设置有容纳槽123a，容纳槽123a沿安装凸台123的周向环形设置，容纳槽123a形成焊环容纳部100。其中，容纳槽123a可设置在安装凸台123的中部，也可设置在安装凸台123的两端，且设置容纳槽123a具有便于加工的优点。
在本实施例中，容纳槽123a位于安装凸台123的远离本体122的一端。采用上述结构，只需对安装凸台123的远离本体122的一端进行车削即可形成容纳槽123a，能够进一步降低加工成本，且便于放置焊环110。
为了焊料能够顺利地在第二管件90与安装凸台123之间流动，第二管件90与安装凸台123之间设置有导流结构，导流结构用于流通焊料，如此能够提升焊接效果，且便于对焊接质量进行检测。
在本实施例中，第二管件90的内壁上设置有导流槽，导流槽形成导流结构。其中，还可以在第二管件90的端面上设置压花，利用压花对焊料进行导流。
通过本实施例提供的装置，具有以下有益效果：
(1)当完成第二管件90和壳体10的焊接后，可通过在第二管件90外部观察第二管件90与阀座12的连接处，若该区域有焊料，则说明焊料已通过第二管件90和阀座12完成焊接；
(2)焊接质量的判断不受第二管件90形状影响，可用于弯管的判定；
(3)当完成第二管件90和壳体10的焊接后，第二管件90的与阀座12连接的外壁处堆积的焊料较少，可有效确保后续装置的定位以及压装；
(4)因堆积的焊料变少，可减少焊料的用量，能够降低成本。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (20)

  1. 一种电子膨胀阀，其特征在于，所述电子膨胀阀包括：
    壳体(10)；
    导向套(20)，设置在所述壳体(10)内；
    转子(40)，可转动地设置在所述壳体(10)内；
    螺杆(50)，设置在所述壳体(10)内，所述转子(40)与所述螺杆(50)驱动连接；
    阀针组件(60)，可移动地设置在所述壳体(10)内，所述螺杆(50)的一端与所述阀针组件(60)连接，以通过所述螺杆(50)带动所述阀针组件(60)轴向移动；
    其中，所述壳体(10)的内壁与所述导向套(20)的外壁之间设置有相互连通的导向段和压装段，位于所述导向段的所述导向套(20)与所述壳体(10)之间的间距大于位于所述压装段的所述导向套(20)与所述壳体(10)之间的间距，所述壳体(10)的内壁与所述导向套(20)的外壁之间还设置有焊环槽(213)，所述焊环槽(213)与所述导向段连通。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述壳体(10)包括套管(11)和阀座(12)，所述导向套(20)设置在所述阀座(12)内，所述导向段和所述压装段位于所述导向套(20)与所述阀座(12)之间。
  3. 根据权利要求2所述的电子膨胀阀，其特征在于，所述阀座(12)具有安装孔(121)，所述导向套(20)设置在所述安装孔(121)内，所述安装孔(121)具有相互连接的第一段(121a)和第二段(121b)，所述第一段(121a)的内壁与所述导向套(20)配合形成所述导向段，所述第二段(121b)的内壁与所述导向套(20)配合形成所述压装段。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，所述导向套(20)上设置有安装凸台(21)，所述安装凸台(21)沿所述导向套(20)的侧壁周向设置，所述安装凸台(21)的侧壁与所述安装孔(121)的内壁之间形成所述导向段和所述压装段。
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述安装凸台(21)包括第三段(211)和第四段(212)，所述第三段(211)对应所述第一段(121a)设置，所述第四段(212)对应所述第二段(121b)设置。
  6. 根据权利要求5所述的电子膨胀阀，其特征在于，所述安装凸台(21)上设置有焊环槽(213)，所述焊环槽(213)位于所述第三段(211)与所述第四段(212)之间，所述焊环槽(213)沿所述安装凸台(21)的侧壁周向设置。
  7. 根据权利要求4所述的电子膨胀阀，其特征在于，所述安装孔(121)内设置有限位凸台(121c)，所述限位凸台(121c)位于所述第二段(121b)的远离所述第一段(121a)的一侧，所述限位凸台(121c)与所述安装凸台(21)相配合，以限制所述导向套(20)相对所述阀座(12)的位移。
  8. 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螺母组件(30)，所述导向套(20)上设置有螺母导向段(22)，所述螺母组件(30)套设在所述螺母导向段(22)上。
  9. 根据权利要求1所述的电子膨胀阀，其特征在于，所述壳体(10)具有相互连通的进孔和出孔，所述阀针组件(60)穿设在所述导向套(20)内，所述阀针组件(60)用于打开或关闭所述出孔，所述电子膨胀阀还包括：
    第一管件(70)，设置在所述进孔内并部分伸入所述壳体(10)内，所述导向套(20)与所述第一管件(70)之间设置有限位结构(80)，所述限位结构(80)用于限制所述第一管件(70)伸入所述壳体(10)的长度尺寸。
  10. 根据权利要求9所述的电子膨胀阀，其特征在于，所述导向套(20)上设置有限位凸台(23)，所述限位凸台(23)对应所述第一管件(70)的端面设置。
  11. 根据权利要求10所述的电子膨胀阀，其特征在于，所述限位凸台(23)沿所述导向套(20)的周向环形设置。
  12. 根据权利要求10所述的电子膨胀阀，其特征在于，所述导向套(20)具有平直段(24)，所述限位凸台(23)位于所述平直段(24)的上方，所述平直段(24)的横截面尺寸小于所述限位凸台(23)的横截面尺寸，所述平直段(24)与所述第一管件(70)的端面之间具有间隔。
  13. 根据权利要求9所述的电子膨胀阀，其特征在于，所述第一管件(70)与所述导向套(20)之间设置有导流结构，所述导流结构用于流通焊料。
  14. 根据权利要求13所述的电子膨胀阀，其特征在于，所述第一管件(70)的伸入所述壳体(10)的端面上设置有导流槽。
  15. 根据权利要求1所述的电子膨胀阀，其特征在于，所述壳体(10)包括相互连接的套管(11)和阀座(12)，所述阀座(12)包括本体(122)和安装凸台(123)，所述安装凸台(123)设置在所述本体(122)的远离所述套管(11)的一端，所述安装凸台(123)上设置有阀口，所述电子膨胀阀还包括：
    第二管件(90)，套设在所述安装凸台(123)上，所述第二管件(90)的内壁与所述安装凸台(123)的外侧壁之间设置有焊环容纳部(100)，所述焊环容纳部(100)用于放置焊环(110)。
  16. 根据权利要求15所述的电子膨胀阀，其特征在于，所述焊环容纳部(100)设置在所述安装凸台(123)上。
  17. 根据权利要求16所述的电子膨胀阀，其特征在于，所述安装凸台(123)的外侧壁上设置有容纳槽(123a)，所述容纳槽(123a)沿所述安装凸台(123)的周向环形设置，所述容纳槽(123a)形成所述焊环容纳部(100)。
  18. 根据权利要求17所述的电子膨胀阀，其特征在于，所述容纳槽(123a)位于所述安装凸台(123)的远离所述本体(122)的一端。
  19. 根据权利要求15所述的电子膨胀阀，其特征在于，所述第二管件(90)与所述安装凸台(123)之间设置有导流结构，所述导流结构用于流通焊料。
  20. 根据权利要求19所述的电子膨胀阀，其特征在于，所述第二管件(90)的内壁上设置有导流槽。
PCT/CN2020/086494 2019-09-27 2020-04-23 电子膨胀阀 WO2021057019A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140054562A (ko) * 2012-10-29 2014-05-09 그린산업 주식회사 전자식 팽창밸브
CN208431390U (zh) * 2018-05-08 2019-01-25 艾默生环境优化技术(苏州)有限公司 阀针组件以及具有该阀针组件的电子膨胀阀
CN209012510U (zh) * 2018-08-17 2019-06-21 浙江盾安禾田金属有限公司 电子膨胀阀
CN209196130U (zh) * 2018-08-02 2019-08-02 浙江盾安禾田金属有限公司 空调及其电子膨胀阀

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001241562A (ja) * 2000-03-01 2001-09-07 Pacific Ind Co Ltd 制御弁
JP4541366B2 (ja) * 2004-12-15 2010-09-08 株式会社鷺宮製作所 電動式コントロールバルブ
CN102734476B (zh) 2011-04-02 2014-09-17 浙江三花股份有限公司 一种电子膨胀阀
WO2013127276A1 (zh) * 2012-02-28 2013-09-06 艾默生环境优化技术(苏州)有限公司 电子膨胀阀
CN103388939B (zh) * 2012-05-11 2016-06-01 浙江三花股份有限公司 一种电子膨胀阀
CN107975629A (zh) * 2016-10-25 2018-05-01 盾安环境技术有限公司 一种车用空调系统电子膨胀阀
JP6726116B2 (ja) * 2017-01-31 2020-07-22 株式会社鷺宮製作所 電動弁及び冷凍サイクルシステム
CN208281509U (zh) 2018-06-13 2018-12-25 浙江三花智能控制股份有限公司 电磁阀
KR20210000190U (ko) * 2018-08-17 2021-01-25 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드 전자 팽창 밸브
CN209180369U (zh) * 2018-08-21 2019-07-30 浙江盾安禾田金属有限公司 电子膨胀阀

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140054562A (ko) * 2012-10-29 2014-05-09 그린산업 주식회사 전자식 팽창밸브
CN208431390U (zh) * 2018-05-08 2019-01-25 艾默生环境优化技术(苏州)有限公司 阀针组件以及具有该阀针组件的电子膨胀阀
CN209196130U (zh) * 2018-08-02 2019-08-02 浙江盾安禾田金属有限公司 空调及其电子膨胀阀
CN209012510U (zh) * 2018-08-17 2019-06-21 浙江盾安禾田金属有限公司 电子膨胀阀

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