WO2018068585A1 - Novel electronic expansion valve - Google Patents

Novel electronic expansion valve Download PDF

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Publication number
WO2018068585A1
WO2018068585A1 PCT/CN2017/098582 CN2017098582W WO2018068585A1 WO 2018068585 A1 WO2018068585 A1 WO 2018068585A1 CN 2017098582 W CN2017098582 W CN 2017098582W WO 2018068585 A1 WO2018068585 A1 WO 2018068585A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
valve
groove
wall
electronic expansion
Prior art date
Application number
PCT/CN2017/098582
Other languages
French (fr)
Chinese (zh)
Inventor
何孝水
陈华军
Original Assignee
诸暨市亿霸电子阀门有限公司
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 诸暨市亿霸电子阀门有限公司 filed Critical 诸暨市亿霸电子阀门有限公司
Publication of WO2018068585A1 publication Critical patent/WO2018068585A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/91—Valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • 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 invention relates to a novel electronic expansion valve.
  • the downward pressure of the valve stem causes the spring to be compressed; when the compression of the spring reaches a certain level, the pressure on the valve needle is maximized; at the same time, the spring inside the valve stem generates an elastic force on the valve stem (ie, the valve is aimed at The reverse axial pressure generated by the valve stem), at this time, the friction between the external thread of the valve stem and the thread inside the valve body becomes large.
  • the valve needle seals the valve hole, and the high pressure at the upper end of the valve hole is greater than the low pressure at the lower end, forming a positive pressure difference, so that the high-pressure gas is opposite to the valve.
  • the needle creates an axial pressure.
  • the axial pressure is generated, which causes the friction between the external thread of the valve stem and the thread inside the valve body of the electronic expansion valve to become larger, and it is more likely that the driving force generated by the stepping motor is less than the counter torque, causing the electronic expansion valve to be stuck. .
  • An object of the present invention is to provide a novel electronic expansion valve which can solve the deficiencies and technical problems mentioned in the above background art.
  • a novel electronic expansion valve includes a valve seat, a bearing seat is disposed on the valve seat, a valve stem is matched on the bearing seat, and a through groove penetrating through the valve seat is formed on the valve seat, and the through slot is inserted a matching bearing seat, a valve stem is disposed in the bearing seat, a matching straight pipe is welded at a bottom end of the through groove, and a side hole communicating with the through groove is disposed on an outer wall of the valve seat The side hole is welded with the matching elbow, an isolation sleeve is welded on the outer wall of the valve seat, and a magnetic rotor is arranged outside the upper end of the valve stem; and the utility model further comprises: a silencer device.
  • the present invention is further provided, wherein the muffling device is a muffling net plate, and the muffling net plate is located between the straight pipe and the through groove.
  • the present invention is further provided, wherein the sound absorbing stencil is made of brass or copper and is porous.
  • the present invention is further provided with a coaxially mounted limit static spring on the outer wall of the bearing housing, and a limited position moving spring is embedded in the spiral groove of the limiting static spring; the spring end of the magnetic rotor And contacting a lateral cylinder of the limiting spring, a positioning hole is formed on the outer wall of the upper port of the bearing seat, and the positioning hole is used for fixing the lateral groove of the limiting static spring.
  • the present invention is further provided with an O-shaped hole for the placement of the muffling screen at the lower middle portion of the through groove.
  • the present invention is further provided with an annular groove at the outer wall of the upper port of the valve seat, a positioning hole penetrating therethrough is disposed below the annular groove, and a spring ring is disposed at the annular groove.
  • the present invention further provides a through hole formed in the bearing housing, a circular groove is formed on the inner wall of the lower port of the through hole, a Teflon gasket is disposed in the circular groove, and a lower end of the bearing seat is disposed at the lower end of the bearing seat a waist-shaped valve hole communicating with the through hole is formed on the outer wall, the center line of the waist-shaped valve hole is coincident with the vertical center line of the side hole, and an annular sealing groove is arranged above the waist-shaped valve hole.
  • a hydrogenated nitrile rubber sealing ring is disposed in the annular sealing groove; a first transverse hole column communicating with the through hole is formed on the outer wall of the middle portion of the bearing seat, and the first horizontal hole column is two and on the same straight line.
  • valve stem includes a rod body, the lower end of the rod body forms an inner axial bore column, and the outer wall of the middle axial bore column forms a seal groove and a ring groove, and the inner axial hole Forming, on the outer wall of the bottom of the column, a second transverse hole column communicating with the inner axial hole column, the second transverse hole column is two and on the same straight line, and forming an external thread on the outer wall of the middle portion of the rod body segment.
  • the present invention has the following beneficial effects:
  • the invention comprises a sound absorbing device, that is, a sound absorbing stencil, which can effectively block the flow rate of the gas, reduce the noise, and provide a certain health guarantee for the human life.
  • the invention improves the valve body and the bearing seat, and the transverse shaft hole is arranged on the valve body and the bearing seat, so that the internal pressure of the electronic expansion valve and the pressure of the air outlet end are equal, and the gas to the valve stem is eliminated.
  • the axial pressure and the two sealing grooves are provided on the outer wall of the valve, which greatly increases the sealing property between each other, prevents the increase of the gas leakage amount, and provides a circular groove in the bearing housing, and the circular groove is provided therein.
  • PTFE gasket makes a good seal between the bottom of the valve body and the Teflon gasket, preventing the increase of gas leakage, and increasing the flow output at the two ring grooves above the bottom of the valve stem. Control accuracy.
  • the invention can reduce the noise during use by keeping the overall appearance structure unchanged by the technical solution, not only can eliminate the axial pressure received by the valve stem, but also achieve a good sealing effect and prevent the gas leakage amount. It can be transformed into other series of electronic expansion valves. At present, it can only be applied to 11 series of electronic expansion valves, resulting in greatly reduced economic costs and environmental protection.
  • Figure 1 is a schematic view of the structure of the present invention.
  • Figure 2 is a schematic view showing the structure of a valve seat portion of the present invention.
  • Figure 3 is a cross-sectional view of the bearing housing of the present invention.
  • Figure 4 is a cross-sectional view of the user in the middle valve body.
  • a novel electronic expansion valve of the present invention includes a valve seat 1 in which The valve seat 1 is provided with a bearing seat 2, on which the valve stem 3 is matched, and a through-groove 11 is formed in the valve seat 1, and the matching bearing seat 2 is inserted into the through-hole 11 a valve stem 3 is disposed in the bearing housing 2, and a matching straight tube 4 is welded to the bottom end of the through slot 11.
  • a side hole 12 communicating with the through slot 11 is disposed on the outer wall of the valve seat 1
  • the side hole 12 is welded with a matching elbow 5, an isolation sleeve 6 is welded on the outer wall of the valve seat 1, and a magnetic rotor is arranged outside the upper end of the valve stem 3.
  • 7 is characterized in that it further comprises a muffling device, the muffling device is a muffling net plate 8, and the muffling net plate 8 is located between the straight pipe 4 and the through groove 11, the muffling net plate
  • the material used in the 8 is brass or copper, which is porous.
  • the setting of the sound absorbing screen 8 can effectively block the flow rate of the gas, reduce the noise, and provide a certain health guarantee for the life of the person, and the O-shaped portion for the silencer stencil 8 is formed at the middle and lower portions of the through groove.
  • the hole 9 is placed in the 0-shaped hole 9 to achieve a good installation.
  • a coaxially mounted limit static spring 21 is disposed on the outer wall of the bearing housing 2, and a limit moving spring 22 is embedded in the spiral groove of the limiting static spring 21; the resistance of the magnetic rotor 7
  • the spring end is in contact with a lateral cylinder of the limiting spring 22, and a positioning hole 23 is formed in the outer wall of the upper port of the bearing housing 2, and the positioning hole 23 is used for fixing the limit static The transverse groove of the spring 21.
  • the outer wall of the upper port of the valve seat 1 is provided with an annular groove 13 .
  • the annular groove 13 is provided with a positioning hole 15 therethrough.
  • the annular groove 13 is provided with a spring ring.
  • a through hole 24 is formed in the bearing housing 2, a circular groove 25 is formed in the inner wall of the lower port of the through hole 24, and a Teflon gasket 101 is disposed in the circular groove 25;
  • a waist-shaped valve hole 26 communicating with the through hole 24 is formed on the outer wall of the lower end of the seat 2, and a center line of the waist-shaped valve hole 26 coincides with a vertical center line of the side hole 12, in the waist type
  • An annular sealing groove 27 is disposed above the valve hole 26, and a hydrogenated nitrile rubber sealing ring 102 is disposed in the annular sealing groove 27;
  • a first transverse hole column 28 communicating with the through hole 24 is formed in the central outer wall of the bearing housing 2
  • the first transverse hole posts 28 are two and are on the same straight line, and the internal thread segments 29 are formed in the through holes 24 .
  • the valve stem 3 includes a rod body 31, and the lower end of the rod body 31 forms an inner axial bore 32, and an outer wall of the middle axial bore 32 forms a seal groove 33 and a ring groove 34.
  • a second transverse bore 35 is formed on the outer wall of the bottom of the inner axial bore 32 to communicate with the inner axial bore 32.
  • the second transverse bore 35 is two and in the same straight line.
  • Upper portion 36 is formed on the outer wall of the middle portion of the rod body 31, and a hydrogenated nitrile rubber seal ring 102 is placed in the seal groove 33.
  • the sound absorbing mesh plate 8 is first loaded into the lower end of the O-shaped hole 9 of the valve seat 1; then two welding rings are placed, the welding ring is wetted by the pure water containing the brazing flux, The side hole 12 of the valve seat 1 and the lower end of the sound absorbing mesh plate 8; finally, the bent pipe and the straight pipe are embedded. Finally, the staff performs brazing operations.
  • the valve body is assembled: in the lower part of the bearing housing 2, there is an annular sealing groove 27, and then a hydrogenated nitrile rubber sealing ring 102 having a size corresponding to the annular sealing groove 27 is embedded; a circular groove 25 at the lower end of the bearing housing 2 is mounted A Teflon gasket 101 is inserted; the bearing housing 2 is inserted into the valve seat 1.
  • the center line of the waist valve hole 26 of the bearing housing 2 coincides with the vertical center line of the side hole 12 of the valve seat 1.
  • the bearing housing 2 is fastened to the valve seat 1, and the positioning pin 14 is inserted into the positioning hole 15 of the valve seat 1 by extrusion, thereby completing the assembly of the valve body.
  • valve stem 3 is fitted into the bearing housing 2 by clockwise twisting. Then install a limit static spring on the bearing housing 2 twenty one.
  • the limiting static spring 21 is coaxial with the bearing housing 2, and the lateral groove of the limiting static spring 21 is fixed to the positioning hole 23 of the bearing housing 2.
  • the limit moving spring 22 is installed, and the limit moving spring 22 is not only coaxial with the bearing housing 2, but also located on the spiral groove between the upper limit point and the lower limit position of the limiting static spring 21.
  • the limit moving spring 22 is twisted to the lower limit position of the limit static spring 21.
  • two hydrogenated nitrile rubber seals 102 are embedded in the two seal grooves 33 of the valve stem 3, and the valve opening angle of the electronic expansion valve is determined by measuring the distance between the uppermost end of the bearing housing 2 and the top of the valve stem 3.
  • the magnetic rotor 7 is fitted into the valve stem 3, and it is confirmed that the spring end of the magnetic rotor 7 is in contact with a lateral cylinder of the limit moving spring 22. Then, the magnetic rotor 7 is combined with the valve stem 3 by laser welding. At the same time, the isolating sleeve 6 is welded to the valve seat 1.
  • the embodiment of the axial pressure of the valve stem 3 is eliminated: when the gas is introduced into the valve body elbow, regardless of the state of the electronic expansion valve, the gas flows in from the first transverse hole post 28 of the bearing housing 2, and then flows in.
  • the second transverse bore 35 of the valve stem 3 flows out from the inner axial bore 32 of the valve stem 3, achieving the same internal pressure of the electronic expansion valve and the pressure at the outlet end, eliminating the axial pressure of the gas on the valve stem 3.
  • the specific implementation of the leakage prevention of the electronic expansion valve is that the electronic expansion valve is in the fully closed state, and is placed on the valve stem 3
  • the sealing ring of the two sealing grooves 33 is in contact with the inner wall of the bearing housing 2, blocking the flow of gas from the gap between the bearing housing 2 and the valve stem 3 into the interior of the electronic expansion valve and the second lateral hole post 35 of the valve stem 3.
  • the straight pipe flows out, resulting in an increase in gas leakage.
  • the seal ring on the bearing housing 2 also prevents an increase in the amount of gas leakage.
  • the gap between the two is eliminated, the gas is effectively blocked from passing through the gap between the two, and the gas leakage amount is prevented from increasing.
  • the accuracy of the flow control of the electronic expansion valve is improved, in particular, through the two annular grooves 34 on the valve stem 3, when the gas is introduced, the two annular grooves 34 are constantly pressurized to prevent the valve stem 3 from being subjected to the air pressure, thereby generating a tendency pressure.
  • the number of valve opening pulses increases, the flow rate of the gas also increases, and its flow characteristic curve becomes linear.
  • the resistance of the valve stem 3 during the rotation process is: the friction between the external thread segment 36 of the valve stem 3 and the internal thread segment 29 of the bearing housing 2; the hydrogenated nitrile rubber sealing ring 102 Frictional force with the inner wall of the bearing housing 2; friction between the bottom of the valve stem 3 and the Teflon gasket 101. Since these frictional forces are always present, they are always much smaller than the driving force generated by the stepper motor. At the same time, because of the feature of the valve stem 3 and the bearing housing 2, the axial pressure generated by the air pressure on the valve stem 3 is eliminated, and the pressure balance between the internal pressure of the electronic expansion valve and the outlet end is ensured.
  • the two ring grooves 34 above the bottom of the valve stem 3 improve the control accuracy of the flow output.
  • the intervention of the muffler stencil 8 complies with the theme of green environmental protection.
  • the invention not only has a simple manufacturing process, but also can change the size of the valve hole and the valve stem to maintain the overall appearance structure, and can be transformed into other series of electronic expansion valves.

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

Abstract

A novel electronic expansion valve, comprising a valve seat (1) on which a bearing housing (2) is provided, the bearing housing (2) having a valve rod (3) matched thereon; the valve seat (1) is provided thereon with a through slot (11) which penetrates from top to bottom; the bearing housing (2) which matches the through slot (11) is inserted into the through slot (11); the valve rod (3) is provided in the bearing housing (2); a straight tube (4) which matches the through slot (11) is welded to the bottom end of the through slot (11); a side hole (12) which is in communication with the through slot (11) is provided on the outer wall of the valve seat (1), a bent tube (5) which matches the side hole (12) being welded onto the side hole (12); a separating sleeve (6) is welded on the outer wall of the valve seat (1); a magnetic rotor (7) is provided outside on the upper end of the valve rod (3); the electronic expansion valve further comprises a muffling device. The electronic expansion valve can efficiently reduce the gas flow rate, reducing noise, and ensuring healthy lives for people.

Description

一种新型电子膨胀阀  A new type of electronic expansion valve
技术领域Technical field
本发明涉及一种新型电子膨胀阀。The invention relates to a novel electronic expansion valve.
背景技术Background technique
目前，国内外的电子膨胀阀品种繁多，结构特征各不一样，但是它们的节流结构都大同小异，主要是锥阀结构。电子膨胀阀内部的阀杆在往全关的方向做轴向运动时，当电子膨胀阀内部的阀针与下面的阀孔相接触，阀杆对阀针开始产生一个轴向压力。当电子膨胀阀在全关状态下，阀杆与阀针相互之间所产生的轴向压力达到最大，这是因为阀针在全关状态下时，已处于静止状态，阀杆内部的弹簧受到阀杆向下的压力，使弹簧被压缩；当弹簧的压缩量到一定的程度时，阀针受到的压力达到最大；与此同时，阀杆内部的弹簧对阀杆产生一个弹力（即阀针对阀杆产生的反向轴向压力），此时，阀杆外螺纹与阀体内螺纹之间的摩擦力变大。在进气管通入高压气体时，且电子膨胀阀在关闭状态下时，阀针将阀孔密封，此时阀孔上端的高压大于下端的低压，形成了一个正压差，使得高压气体对阀针产生了一个轴向压力。因此，轴向压力的产生，导致电子膨胀阀内部阀杆外螺纹与阀体内螺纹之间的摩擦力变大，更有可能因为步进电机产生的驱动力小于反扭矩，致使电子膨胀阀卡滞。At present, there are many kinds of electronic expansion valves at home and abroad, and their structural characteristics are different, but their throttling structures are similar, mainly cone valve structure. When the valve stem inside the electronic expansion valve is axially moved in the direction of full closing, when the valve needle inside the electronic expansion valve contacts the valve hole below, the valve stem begins to generate an axial pressure on the valve needle. When the electronic expansion valve is in the fully closed state, the axial pressure generated between the valve stem and the valve needle is maximized. This is because the valve needle is in a static state when the valve needle is in the fully closed state, and the spring inside the valve stem is subjected to the spring. The downward pressure of the valve stem causes the spring to be compressed; when the compression of the spring reaches a certain level, the pressure on the valve needle is maximized; at the same time, the spring inside the valve stem generates an elastic force on the valve stem (ie, the valve is aimed at The reverse axial pressure generated by the valve stem), at this time, the friction between the external thread of the valve stem and the thread inside the valve body becomes large. When the intake pipe is filled with high-pressure gas, and the electronic expansion valve is in the closed state, the valve needle seals the valve hole, and the high pressure at the upper end of the valve hole is greater than the low pressure at the lower end, forming a positive pressure difference, so that the high-pressure gas is opposite to the valve. The needle creates an axial pressure. Therefore, the axial pressure is generated, which causes the friction between the external thread of the valve stem and the thread inside the valve body of the electronic expansion valve to become larger, and it is more likely that the driving force generated by the stepping motor is less than the counter torque, causing the electronic expansion valve to be stuck. .
这种锥阀结构中的阀针与其下面的阀孔，存在着一定的间隙。由于这些间隙的存在，导致气体泄漏量增加。There is a certain gap between the valve needle in the valve structure and the valve hole below it. Due to the presence of these gaps, the amount of gas leakage increases.
也因为这种锥阀结构，对电子膨胀阀的流量特性其线性度是不理想的，即在条件一定(压差一定)的情况下，流量与开度并不是成比例关系，而是成曲线关系，接近于二次曲线。这种成二次曲线的流量特性不利于流量的精确控制，因为对于改变相同数量的开度，流量的变化并不相同，所以控制的难度很大，也不能对流量的精确控制。基于此，要想提高数控流量的流量特性，就必须突破锥阀结构的固有缺陷、对电子膨胀阀进行创新，发明一种更合理的节流结构。合理的节流结构能够从本质上改变数控流量的流量调节特性，从而提高 数控流量的性能，使控制满足***要求，达到既精确又节能的效果。Because of this kind of cone valve structure, the linearity of the flow characteristics of the electronic expansion valve is not ideal, that is, under certain conditions (the pressure difference is constant), the flow rate is not proportional to the opening degree, but is a curve. Relationship, close to the quadratic curve. This quadratic flow characteristic is not conducive to precise control of the flow rate, because the flow rate changes are not the same for changing the same number of opening degrees, so the control is difficult and the flow rate cannot be accurately controlled. Based on this, in order to improve the flow characteristics of the numerical control flow, it is necessary to break through the inherent defects of the cone valve structure, innovate the electronic expansion valve, and invent a more reasonable throttle structure. A reasonable throttling structure can essentially change the flow regulation characteristics of the numerical control flow, thereby improving The performance of the CNC flow allows the control to meet the system requirements and achieve both accurate and energy-saving effects.
还有，当电子膨胀阀在开阀过程中，随着开度的增加，气体流量也随之增加。其中，出口端发出的声音也变得越来越响。我们知道，电子膨胀阀是制冷***中的流量控制阀，比如，电子膨胀阀在空调当中的应用。空调现在是人们生活中必不可缺少的家电，由于空调在运行中，始终存在着噪音，对人的生活和健康存在着一定的影响。对此，消除噪音，对提高人们生活品质和身体素质提供了一种保障。有鉴于此，本发明人就此提出改良，以满足市场上的需求。Also, when the electronic expansion valve is opened, the gas flow rate increases as the opening degree increases. Among them, the sound from the exit end has become louder and louder. We know that electronic expansion valves are flow control valves in refrigeration systems, such as the use of electronic expansion valves in air conditioning. Air-conditioning is now an indispensable home appliance in people's lives. Because air conditioners are running, there is always noise, which has a certain impact on people's lives and health. In this regard, the elimination of noise provides a guarantee for improving people's quality of life and physical fitness. In view of this, the inventors have proposed improvements to meet the needs of the market.
发明内容Summary of the invention
本发明的目的是为了提供一种能够解决上述背景技术中提及的不足之处和技术问题的新型电子膨胀阀。SUMMARY OF THE INVENTION An object of the present invention is to provide a novel electronic expansion valve which can solve the deficiencies and technical problems mentioned in the above background art.
为了实现上述目的，本发明采用如下技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
一种新型电子膨胀阀，包括阀座，在所述阀座上设有轴承座，所述轴承座上相配阀杆，在所述阀座上形成上下贯通的通槽，所述通槽内***相配的轴承座，在所述轴承座内设有阀杆，在所述通槽的底端焊接相配的直管，在所述阀座外壁上设有与所述通槽相通的侧面孔，所述侧面孔焊接相配的弯管，在所述阀座的外壁上焊接一隔离套管，在所述阀杆上端外部设有磁转子；其特征在于：还包括了消音装置。A novel electronic expansion valve includes a valve seat, a bearing seat is disposed on the valve seat, a valve stem is matched on the bearing seat, and a through groove penetrating through the valve seat is formed on the valve seat, and the through slot is inserted a matching bearing seat, a valve stem is disposed in the bearing seat, a matching straight pipe is welded at a bottom end of the through groove, and a side hole communicating with the through groove is disposed on an outer wall of the valve seat The side hole is welded with the matching elbow, an isolation sleeve is welded on the outer wall of the valve seat, and a magnetic rotor is arranged outside the upper end of the valve stem; and the utility model further comprises: a silencer device.
对本发明做进一步设置，所述消音装置是一消音网板，所述消音网板位于所述直管与所述通槽之间。Further, the present invention is further provided, wherein the muffling device is a muffling net plate, and the muffling net plate is located between the straight pipe and the through groove.
对本发明做进一步设置，所述的消音网板所采用的材质是黄铜或紫铜，成多孔状。Further, the present invention is further provided, wherein the sound absorbing stencil is made of brass or copper and is porous.
对本发明做进一步设置，在所述轴承座的外壁上设有同轴安装的限位静簧，在所述限位静簧的螺旋槽内嵌有限位动簧；所述磁转子的阻簧端与所述限位动簧的一个横向圆柱相碰触，在所述轴承座的上端口外壁上设有定位孔槽，所述定位孔槽用于固定所述限位静簧的横沟。Further, the present invention is further provided with a coaxially mounted limit static spring on the outer wall of the bearing housing, and a limited position moving spring is embedded in the spiral groove of the limiting static spring; the spring end of the magnetic rotor And contacting a lateral cylinder of the limiting spring, a positioning hole is formed on the outer wall of the upper port of the bearing seat, and the positioning hole is used for fixing the lateral groove of the limiting static spring.
对本发明做进一步设置，所述通槽的中下部处形成用于消音网板放置的O型孔。Further, the present invention is further provided with an O-shaped hole for the placement of the muffling screen at the lower middle portion of the through groove.
对本发明做进一步设置，所述阀座的上端口外壁处设有环形槽，所述环形槽的下方设有贯穿的定位孔；所述环形槽处设有弹簧圈。Further, the present invention is further provided with an annular groove at the outer wall of the upper port of the valve seat, a positioning hole penetrating therethrough is disposed below the annular groove, and a spring ring is disposed at the annular groove.
对本发明做进一步设置，在所述轴承座上形成通孔，所述通孔的下端口内壁上形成圆槽，所述圆槽内设有聚四氟乙烯密封垫；在所述轴承座下端的外壁上形成与通孔相通的腰型阀孔，所述腰型阀孔的中心线与所述侧面孔的竖向中心线一致，在所述腰型阀孔上方设有一个环形密封槽，所述环形密封槽内设有氢化丁晴橡胶密封圈；所述轴承座中部外壁上形成与通孔相通的第一横向孔柱，所述第一横向孔柱为2个且处于同一条直线上。Further, the present invention further provides a through hole formed in the bearing housing, a circular groove is formed on the inner wall of the lower port of the through hole, a Teflon gasket is disposed in the circular groove, and a lower end of the bearing seat is disposed at the lower end of the bearing seat a waist-shaped valve hole communicating with the through hole is formed on the outer wall, the center line of the waist-shaped valve hole is coincident with the vertical center line of the side hole, and an annular sealing groove is arranged above the waist-shaped valve hole. A hydrogenated nitrile rubber sealing ring is disposed in the annular sealing groove; a first transverse hole column communicating with the through hole is formed on the outer wall of the middle portion of the bearing seat, and the first horizontal hole column is two and on the same straight line.
对本发明做进一步设置，所述阀杆包括杆体，所述杆体的下端形成内轴向孔柱，所述内轴向孔柱中部的外壁上形成密封槽和环槽，在所述内轴向孔柱底部的外壁上形成与所述内轴向孔柱相通的第二横向孔柱，所述第二横向孔柱为2个且处于同一条直线上，在所述杆体中部的外壁上形成外螺纹段。Further, the valve stem includes a rod body, the lower end of the rod body forms an inner axial bore column, and the outer wall of the middle axial bore column forms a seal groove and a ring groove, and the inner axial hole Forming, on the outer wall of the bottom of the column, a second transverse hole column communicating with the inner axial hole column, the second transverse hole column is two and on the same straight line, and forming an external thread on the outer wall of the middle portion of the rod body segment.
与现有技术比较，本发明具有以下的有益效果：Compared with the prior art, the present invention has the following beneficial effects:
本发明包括了消音装置，也就是消音网板，能够有效地阻挡了气体的流速，降低了噪声，对人的生活提供了一定的健康保障。同时本发明在此基础上通过改良了阀体和轴承座，在阀体和轴承座上设置了横向轴孔，实现实现了电子膨胀阀内部压强与出气端的压强相等，消除了气体对阀杆的轴向压力，同时在阀体外壁设置了2道密封槽，大大增加了彼此之间的密封性，防止了气体泄漏量的增加，而且在轴承座内设置了圆槽，所述圆槽内设有聚四氟乙烯密封垫，使得阀体底部与聚四氟乙烯密封垫之间形成良好的密封，防止了气体泄漏量的增加，同时在阀杆底部上方的两个环槽，提高了流量输出的控制精度。The invention comprises a sound absorbing device, that is, a sound absorbing stencil, which can effectively block the flow rate of the gas, reduce the noise, and provide a certain health guarantee for the human life. At the same time, the invention improves the valve body and the bearing seat, and the transverse shaft hole is arranged on the valve body and the bearing seat, so that the internal pressure of the electronic expansion valve and the pressure of the air outlet end are equal, and the gas to the valve stem is eliminated. The axial pressure and the two sealing grooves are provided on the outer wall of the valve, which greatly increases the sealing property between each other, prevents the increase of the gas leakage amount, and provides a circular groove in the bearing housing, and the circular groove is provided therein. PTFE gasket makes a good seal between the bottom of the valve body and the Teflon gasket, preventing the increase of gas leakage, and increasing the flow output at the two ring grooves above the bottom of the valve stem. Control accuracy.
本发明通过本技术方案在保持整体外观结构不变的情况下，可以降低使用过程中的噪音，不仅能消除阀杆受到的轴向压力，而且做到良好的密封效果，防止了气体泄漏量的增加，同时可以改造成其他系列的电子膨胀阀，目前，只能适用于11种系列的电子膨胀阀，从而致使经济成本大大降低，环保。The invention can reduce the noise during use by keeping the overall appearance structure unchanged by the technical solution, not only can eliminate the axial pressure received by the valve stem, but also achieve a good sealing effect and prevent the gas leakage amount. It can be transformed into other series of electronic expansion valves. At present, it can only be applied to 11 series of electronic expansion valves, resulting in greatly reduced economic costs and environmental protection.
附图说明DRAWINGS
下面结合附图和具体实施方式对本发明作详细阐述：The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments:
图1为本发明的结构示意图。Figure 1 is a schematic view of the structure of the present invention.
图2为本发明中阀座部分的结构示意图。Figure 2 is a schematic view showing the structure of a valve seat portion of the present invention.
图3为本发明中轴承座的剖面图。Figure 3 is a cross-sectional view of the bearing housing of the present invention.
图4为本使用者在中阀体的剖面图。Figure 4 is a cross-sectional view of the user in the middle valve body.
具体实施方式detailed description
下面通过实施例，并结合附图，对本发明的技术方案作进一步具体的说明。The technical solutions of the present invention will be further specifically described below by way of embodiments and with reference to the accompanying drawings.
如图1、图2、图3和图4所示，本发明新型一种新型电子膨胀阀，包括阀座1，在所述 阀座1上设有轴承座2，所述轴承座2上相配阀杆3，在所述阀座1上形成上下贯通的通槽11，所述通槽11内***相配的轴承座2，在所述轴承座2内设有阀杆3，在所述通槽11的底端焊接相配的直管4，在所述阀座1外壁上设有与所述通槽11相通的侧面孔12，所述侧面孔12焊接相配的弯管5，在所述阀1座的外壁上焊接一隔离套管6，在所述阀杆3上端外部设有磁转子 7；其特征在于：还包括了消音装置，所述消音装置是一消音网板8，所述消音网板8位于所述直管4与所述通槽11之间，所述的消音网板8所采用的材质是黄铜或紫铜，成多孔状。该消音网板8的设置能够有效地阻挡了气体的流速，降低了噪声，对人的生活提供了一定的健康保障，所述通槽的中下部处形成用于消音网板8放置的O型孔9，将消音网板放置在0型孔9中，实现良好的安装。As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, a novel electronic expansion valve of the present invention includes a valve seat 1 in which The valve seat 1 is provided with a bearing seat 2, on which the valve stem 3 is matched, and a through-groove 11 is formed in the valve seat 1, and the matching bearing seat 2 is inserted into the through-hole 11 a valve stem 3 is disposed in the bearing housing 2, and a matching straight tube 4 is welded to the bottom end of the through slot 11. A side hole 12 communicating with the through slot 11 is disposed on the outer wall of the valve seat 1 The side hole 12 is welded with a matching elbow 5, an isolation sleeve 6 is welded on the outer wall of the valve seat 1, and a magnetic rotor is arranged outside the upper end of the valve stem 3. 7 is characterized in that it further comprises a muffling device, the muffling device is a muffling net plate 8, and the muffling net plate 8 is located between the straight pipe 4 and the through groove 11, the muffling net plate The material used in the 8 is brass or copper, which is porous. The setting of the sound absorbing screen 8 can effectively block the flow rate of the gas, reduce the noise, and provide a certain health guarantee for the life of the person, and the O-shaped portion for the silencer stencil 8 is formed at the middle and lower portions of the through groove. The hole 9 is placed in the 0-shaped hole 9 to achieve a good installation.
本发明中在所述轴承座2的外壁上设有同轴安装的限位静簧21，在所述限位静簧21的螺旋槽内嵌有限位动簧22；所述磁转子7的阻簧端与所述限位动簧22的一个横向圆柱相碰触，在所述轴承座2的上端口外壁上设有定位孔槽23，所述定位孔槽23用于固定所述限位静簧21的横沟。In the present invention, a coaxially mounted limit static spring 21 is disposed on the outer wall of the bearing housing 2, and a limit moving spring 22 is embedded in the spiral groove of the limiting static spring 21; the resistance of the magnetic rotor 7 The spring end is in contact with a lateral cylinder of the limiting spring 22, and a positioning hole 23 is formed in the outer wall of the upper port of the bearing housing 2, and the positioning hole 23 is used for fixing the limit static The transverse groove of the spring 21.
本发明中所述阀座1的上端口外壁处设有环形槽13，所述环形槽13的下方设有贯穿的定位孔15；所述环形槽13处设有弹簧圈。In the present invention, the outer wall of the upper port of the valve seat 1 is provided with an annular groove 13 . The annular groove 13 is provided with a positioning hole 15 therethrough. The annular groove 13 is provided with a spring ring.
本发明中在所述轴承座2上形成通孔24，所述通孔24的下端口内壁上形成圆槽25，所述圆槽25内设有聚四氟乙烯密封垫101；在所述轴承座2下端的外壁上形成与通孔24相通的腰型阀孔26，所述腰型阀孔26的中心线与所述侧面孔12的竖向中心线一致，在所述腰型 阀孔26上方设有一个环形密封槽27，所述环形密封槽27内设有氢化丁晴橡胶密封圈102；所述轴承座2中部外壁上形成与通孔24相通的第一横向孔柱28，所述第一横向孔柱28为2个且处于同一条直线上，在所述通孔24内形成内螺纹段29。In the present invention, a through hole 24 is formed in the bearing housing 2, a circular groove 25 is formed in the inner wall of the lower port of the through hole 24, and a Teflon gasket 101 is disposed in the circular groove 25; A waist-shaped valve hole 26 communicating with the through hole 24 is formed on the outer wall of the lower end of the seat 2, and a center line of the waist-shaped valve hole 26 coincides with a vertical center line of the side hole 12, in the waist type An annular sealing groove 27 is disposed above the valve hole 26, and a hydrogenated nitrile rubber sealing ring 102 is disposed in the annular sealing groove 27; a first transverse hole column 28 communicating with the through hole 24 is formed in the central outer wall of the bearing housing 2 The first transverse hole posts 28 are two and are on the same straight line, and the internal thread segments 29 are formed in the through holes 24 .
本发明中所述阀杆3包括杆体31，所述杆体31的下端形成内轴向孔柱32，所述内轴向孔柱32中部的外壁上形成密封槽33和环槽34，在所述内轴向孔柱32底部的外壁上形成与所述内轴向孔柱32相通的第二横向孔柱35，所述第二横向孔柱35为2个且处于同一条直线 上，在所述杆体31中部的外壁上形成外螺纹段36，所述密封槽33内放置氢化丁晴橡胶密封 圈102。In the present invention, the valve stem 3 includes a rod body 31, and the lower end of the rod body 31 forms an inner axial bore 32, and an outer wall of the middle axial bore 32 forms a seal groove 33 and a ring groove 34. A second transverse bore 35 is formed on the outer wall of the bottom of the inner axial bore 32 to communicate with the inner axial bore 32. The second transverse bore 35 is two and in the same straight line. Upper portion 36 is formed on the outer wall of the middle portion of the rod body 31, and a hydrogenated nitrile rubber seal ring 102 is placed in the seal groove 33.
本发明在实际安装过中，首先在阀座1的O型孔9下端装入消音网板8；接着放入两个焊环，该焊环已被含有钎焊剂的纯净水浸湿，在阀座1的侧面孔12和消音网板8的下端；最后嵌入弯管和直管。最后，工作人员进行钎焊作业。In the actual installation, the sound absorbing mesh plate 8 is first loaded into the lower end of the O-shaped hole 9 of the valve seat 1; then two welding rings are placed, the welding ring is wetted by the pure water containing the brazing flux, The side hole 12 of the valve seat 1 and the lower end of the sound absorbing mesh plate 8; finally, the bent pipe and the straight pipe are embedded. Finally, the staff performs brazing operations.
对阀体进行组装：在轴承座2中下方，有一个环形密封槽27，然后嵌入一个尺寸符合这个环形密封槽27的氢化丁晴橡胶密封圈102；在轴承座2下端的圆槽25，装入一个聚四氟乙烯密封垫101；把轴承座2***阀座1中。其中，轴承座2的腰型阀孔26的中心线与阀座1的侧面孔12的竖向中心线一致。其次，通过工装压制，把轴承座2被扣在阀座1上，以及通过挤压的方式，把定位销14嵌入阀座1上的定位孔15，完成阀体的组装。The valve body is assembled: in the lower part of the bearing housing 2, there is an annular sealing groove 27, and then a hydrogenated nitrile rubber sealing ring 102 having a size corresponding to the annular sealing groove 27 is embedded; a circular groove 25 at the lower end of the bearing housing 2 is mounted A Teflon gasket 101 is inserted; the bearing housing 2 is inserted into the valve seat 1. The center line of the waist valve hole 26 of the bearing housing 2 coincides with the vertical center line of the side hole 12 of the valve seat 1. Next, by pressing the tooling, the bearing housing 2 is fastened to the valve seat 1, and the positioning pin 14 is inserted into the positioning hole 15 of the valve seat 1 by extrusion, thereby completing the assembly of the valve body.
进一步地通过顺时针扭转，把阀杆3装入轴承座2。然后在轴承座2上装入限位静簧 21。该限位静簧21与轴承座2同轴，且限位静簧21的横沟固定在轴承座2的定位孔槽23上。Further, the valve stem 3 is fitted into the bearing housing 2 by clockwise twisting. Then install a limit static spring on the bearing housing 2 twenty one. The limiting static spring 21 is coaxial with the bearing housing 2, and the lateral groove of the limiting static spring 21 is fixed to the positioning hole 23 of the bearing housing 2.
进一步地装入限位动簧22，该限位动簧22，不仅与轴承座2同轴，而且位于限位静簧21的上限为点和下限位点之间的螺旋槽上。Further, the limit moving spring 22 is installed, and the limit moving spring 22 is not only coaxial with the bearing housing 2, but also located on the spiral groove between the upper limit point and the lower limit position of the limiting static spring 21.
进一步地把限位动簧22扭到限位静簧21的下限位点。其次，阀杆3的两个密封槽33上嵌入两个氢化丁晴橡胶密封圈102，通过测量轴承座2最上端和阀杆3顶部之间的距离，来确定电子膨胀阀的开阀角度。接着，把磁转子7嵌入阀杆3，确认磁转子7的阻簧端与限位动簧22的一个横向圆柱相碰触。然后，通过激光焊接，把磁转子7与阀杆3相联合。与此同时，把隔离套管6焊接在阀座1上。Further, the limit moving spring 22 is twisted to the lower limit position of the limit static spring 21. Next, two hydrogenated nitrile rubber seals 102 are embedded in the two seal grooves 33 of the valve stem 3, and the valve opening angle of the electronic expansion valve is determined by measuring the distance between the uppermost end of the bearing housing 2 and the top of the valve stem 3. Next, the magnetic rotor 7 is fitted into the valve stem 3, and it is confirmed that the spring end of the magnetic rotor 7 is in contact with a lateral cylinder of the limit moving spring 22. Then, the magnetic rotor 7 is combined with the valve stem 3 by laser welding. At the same time, the isolating sleeve 6 is welded to the valve seat 1.
其中，消除阀杆3轴向压力的实施方式：当在阀体弯管通入气体时，不管电子膨胀阀处于什么状态，气体都会从轴承座2的第一横向孔柱28流进，接着流入阀杆3的第二横向孔柱35，从阀杆3的内轴向孔柱32流出，实现了电子膨胀阀内部压强与出气端的压强相等，消除了气体对阀杆3的轴向压力。Wherein, the embodiment of the axial pressure of the valve stem 3 is eliminated: when the gas is introduced into the valve body elbow, regardless of the state of the electronic expansion valve, the gas flows in from the first transverse hole post 28 of the bearing housing 2, and then flows in. The second transverse bore 35 of the valve stem 3 flows out from the inner axial bore 32 of the valve stem 3, achieving the same internal pressure of the electronic expansion valve and the pressure at the outlet end, eliminating the axial pressure of the gas on the valve stem 3.
电子膨胀阀的防泄漏的具体实施是在电子膨胀阀处于全关状态，通过套在阀杆3 的两个密封槽33的密封圈，与轴承座2的内壁相接触，阻挡了气体从轴承座2与阀杆3之间的间隙流入电子膨胀阀内部和阀杆3的第二横向孔柱35，最后流出直管，导致气体泄漏量增加。与此同理，轴承座2上的密封圈也防止了气体泄漏量的增加。还有通过聚四氟乙烯密封垫101和阀杆3之间的匹配，消除两者之间的间隙，有效地阻挡了气体通过两者之间的间隙，防止了气体泄漏量增加。The specific implementation of the leakage prevention of the electronic expansion valve is that the electronic expansion valve is in the fully closed state, and is placed on the valve stem 3 The sealing ring of the two sealing grooves 33 is in contact with the inner wall of the bearing housing 2, blocking the flow of gas from the gap between the bearing housing 2 and the valve stem 3 into the interior of the electronic expansion valve and the second lateral hole post 35 of the valve stem 3. Finally, the straight pipe flows out, resulting in an increase in gas leakage. In the same way, the seal ring on the bearing housing 2 also prevents an increase in the amount of gas leakage. Also, by the matching between the Teflon gasket 101 and the valve stem 3, the gap between the two is eliminated, the gas is effectively blocked from passing through the gap between the two, and the gas leakage amount is prevented from increasing.
电子膨胀阀流量控制精度的提高，具体是通过阀杆3上的两个环槽34，当通入气体时，两个环槽34四周恒压，防止了阀杆3受到气压时，产生一个倾向的压力。随着开阀脉冲步数的增加，气体的流量也随之增加，它的流量特性曲线成线性状态。The accuracy of the flow control of the electronic expansion valve is improved, in particular, through the two annular grooves 34 on the valve stem 3, when the gas is introduced, the two annular grooves 34 are constantly pressurized to prevent the valve stem 3 from being subjected to the air pressure, thereby generating a tendency pressure. As the number of valve opening pulses increases, the flow rate of the gas also increases, and its flow characteristic curve becomes linear.
本发明在步进电机的驱动下，阀杆3在旋转过程中受到的阻力为：阀杆3外螺纹段36与轴承座2内螺纹段29之间的摩擦力；氢化丁晴橡胶密封圈102与轴承座2内壁之间的摩擦力；阀杆3底部与聚四氟乙烯密封垫101之间的摩擦力。由于这些摩擦力始终存在，但始终远远小于步进电机所产生的驱动力。同时，也因为阀杆3与轴承座2的零件特征，消除了气压对阀杆3所产生的轴向压力，保证了电子膨胀阀内压与出气端的压强平衡。同时，也由于摩擦力的减小，延长了电子膨胀阀的寿命。阀杆3底部上方的两个环槽34，提高了流量输出的控制精度。消音网板8的介入，符合了绿色环保的主题。Under the driving of the stepping motor, the resistance of the valve stem 3 during the rotation process is: the friction between the external thread segment 36 of the valve stem 3 and the internal thread segment 29 of the bearing housing 2; the hydrogenated nitrile rubber sealing ring 102 Frictional force with the inner wall of the bearing housing 2; friction between the bottom of the valve stem 3 and the Teflon gasket 101. Since these frictional forces are always present, they are always much smaller than the driving force generated by the stepper motor. At the same time, because of the feature of the valve stem 3 and the bearing housing 2, the axial pressure generated by the air pressure on the valve stem 3 is eliminated, and the pressure balance between the internal pressure of the electronic expansion valve and the outlet end is ensured. At the same time, the life of the electronic expansion valve is prolonged due to the reduction of friction. The two ring grooves 34 above the bottom of the valve stem 3 improve the control accuracy of the flow output. The intervention of the muffler stencil 8 complies with the theme of green environmental protection.
本发明通过本技术方案，以及零部件的结构特征，不仅制造工艺简单，而且通过改变阀孔和阀杆的尺寸，保持整体外观结构不变，可以改造成其他系列的电子膨胀阀，目前，只能适用于11种系列的电子膨胀阀，从而致使经济成本大大降低，环保。Through the technical scheme and the structural features of the components, the invention not only has a simple manufacturing process, but also can change the size of the valve hole and the valve stem to maintain the overall appearance structure, and can be transformed into other series of electronic expansion valves. Currently, only It can be applied to 11 series of electronic expansion valves, resulting in greatly reduced economic costs and environmental protection.
上述实施例只是为了说明本发明的技术构思及特点，其目的是在于让本领域内的普通技术人员能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围。凡是根据本发明内容的实质所作出的等效的变化或修饰，都应涵盖在本发明的保护范围内。The above embodiments are only intended to illustrate the technical concept and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention. Equivalent variations or modifications made in accordance with the substance of the invention are intended to be included within the scope of the invention.

Claims (8)

  1. 一种新型电子膨胀阀，包括阀座，在所述阀座上设有轴承座，所述轴承座上相配阀 杆，在所述阀座上形成上下贯通的通槽，所述通槽内***相配的轴承座，在所述轴承座内设有阀杆，在所述通槽的底端焊接相配的直管，在所述阀座外壁上设有与所述通槽相通的侧面孔，所述侧面孔焊接相配的弯管，在所述阀座的外壁上焊接一隔离套管，在所述阀杆上端外部设有磁转子；其特征在于：还包括了消音装置。  A novel electronic expansion valve includes a valve seat, a bearing seat is disposed on the valve seat, and a matching valve is arranged on the bearing seat a rod, a through-hole through groove is formed in the valve seat, a matching bearing seat is inserted into the through groove, a valve stem is arranged in the bearing seat, and a matching straight pipe is welded at a bottom end of the through groove Providing a side hole communicating with the through groove on the outer wall of the valve seat, the side hole is welded with a matching elbow, and an isolation sleeve is welded on the outer wall of the valve seat, at the upper end of the valve stem The outer side is provided with a magnetic rotor; characterized in that it further comprises a sound absorbing device.
  2. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：所述消音装置是一消音网 板，所述消音网板位于所述直管与所述通槽之间。A novel electronic expansion valve according to claim 1, wherein said muffling device is a muffling net a board, the sound absorbing screen is located between the straight tube and the through slot.
  3. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：所述的消音网板所采用的材质是黄铜或紫铜，成多孔状。A novel electronic expansion valve according to claim 1, wherein the sound absorbing stencil is made of brass or copper and is porous.
  4. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：在所述轴承座的外壁上设有同轴安装的限位静簧，在所述限位静簧的螺旋槽内嵌有限位动簧；所述磁转子的阻簧端与 所述限位动簧的一个横向圆柱相碰触，在所述轴承座的上端口外壁上设有定位孔槽，所述定位孔槽用于固定所述限位静簧的横沟。A novel electronic expansion valve according to claim 1, wherein a coaxially mounted limit static spring is disposed on the outer wall of the bearing housing, and a limited position is embedded in the spiral groove of the limiting static spring. Moving spring; the spring end of the magnetic rotor A lateral cylinder of the limiting moving spring is in contact with each other, and a positioning hole groove is arranged on the outer wall of the upper port of the bearing seat, and the positioning hole groove is used for fixing the lateral groove of the limiting static spring.
  5. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：所述通槽的中下部处形成用于消音网板放置的O型孔。A novel electronic expansion valve according to claim 1, wherein an O-shaped hole for the muffling screen is formed at a middle and a lower portion of the through groove.
  6. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：所述阀座的上端口外壁处设有环形槽，所述环形槽的下方设有贯穿的定位孔；所述环形槽处设有弹簧圈。A novel electronic expansion valve according to claim 1, wherein an annular groove is formed in an outer wall of the upper port of the valve seat, and a positioning hole penetrating therethrough is disposed under the annular groove; There are spring coils.
  7. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：在所述轴承座上形成通孔， 所述通孔的下端口内壁上形成圆槽，所述圆槽内设有聚四氟乙烯密封垫；在所述轴承座下端的外壁上形成与通孔相通的腰型阀孔，所述腰型阀孔的中心线与所述侧面孔的竖向中心线一致，在所述腰型阀孔上方设有一个环形密封槽，所述环形密封槽内设有氢化丁晴橡胶密封圈；所述轴承座中部外壁上形成与通孔相通的第一横向孔柱，所述第一横向孔柱为2个且处于同一条直线上。A novel electronic expansion valve according to claim 1, wherein a through hole is formed in said bearing housing, a circular groove is formed on the inner wall of the lower port of the through hole, and a Teflon gasket is disposed in the circular groove; a waist valve hole communicating with the through hole is formed on the outer wall of the lower end of the bearing seat, the waist The center line of the valve hole is aligned with the vertical center line of the side hole, and an annular sealing groove is disposed above the waist valve hole, and the annular sealing groove is provided with a hydrogenated nitrile rubber sealing ring; A first transverse hole column communicating with the through hole is formed on the outer wall of the middle portion of the bearing housing, and the first horizontal hole column is two and on the same straight line.
  8. 根据权利要求1所述一种新型电子膨胀阀，其特征在于：所述阀杆包括杆体，所述杆 体的下端形成内轴向孔柱，所述内轴向孔柱中部的外壁上形成密封槽和环槽，在所述内轴向孔柱底部的外壁上形成与所述内轴向孔柱相通的第二横向孔柱，所述第二横向孔柱为2个且处于同一条直线上，在所述杆体中部的外壁上形成外螺纹段。A novel electronic expansion valve according to claim 1, wherein said valve stem comprises a rod body, said rod The lower end of the body forms an inner axial hole column, and the outer wall of the inner axial hole column forms a sealing groove and a ring groove, and an outer wall of the bottom portion of the inner axial hole column is formed to communicate with the inner axial hole column a second transverse hole column, the second transverse hole column is 2 and on the same straight line, and an external thread segment is formed on the outer wall of the middle portion of the rod body.
PCT/CN2017/098582 2016-10-12 2017-08-23 Novel electronic expansion valve WO2018068585A1 (en)

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