JP2019504253A - 2-stage electronic expansion valve - Google Patents
2-stage electronic expansion valve Download PDFInfo
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- JP2019504253A JP2019504253A JP2018530573A JP2018530573A JP2019504253A JP 2019504253 A JP2019504253 A JP 2019504253A JP 2018530573 A JP2018530573 A JP 2018530573A JP 2018530573 A JP2018530573 A JP 2018530573A JP 2019504253 A JP2019504253 A JP 2019504253A
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- 230000030279 gene silencing Effects 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims description 27
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000003466 welding Methods 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 abstract description 9
- 230000002159 abnormal effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 8
- 230000003584 silencer Effects 0.000 description 6
- 230000009699 differential effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- 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
- 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
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- 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
- F16K1/52—Means for additional adjustment of the rate of flow
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
- Magnetically Actuated Valves (AREA)
- Mechanically-Actuated Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
モータ（１）と、前記モータ（１）の出力側に接続される減速機（２）とを含み、弁棒（１５）にベローズ（１１）が外挿し、前記ベローズ（１１）は前記弁棒（１５）の往復運動に伴って伸縮する２段階式電子膨張弁であって、前記弁棒（１５）に動かされて第１弁口（１３）を開閉する弁体（１２）をさらに含み、前記弁体（１２）の内部には小流量調節機構がさらに設けられている。前記２段階式電子膨張弁によれば、小流量調節段階において、弁体（１２）の下端部と第１弁口（１３）とが始終接触状態にあり、流体は、網目状の消音部材によってその内部の渦、泡が大幅に除去され分散されるため、従来の電子膨張弁では、初期段階の小流量調節時に異常な騒音が生じる問題を解決する。同時に、小流量調節は、主として弁体の内部に設けられた第２弁口（１２５）によって行われるため、同じパルス数の条件下で、流量調節範囲がより広く、精度がより高い。 A motor (1) and a speed reducer (2) connected to the output side of the motor (1); a bellows (11) is extrapolated to the valve stem (15), and the bellows (11) is the valve stem A two-stage electronic expansion valve that expands and contracts with the reciprocating motion of (15), further comprising a valve element (12) that is moved by the valve stem (15) to open and close the first valve port (13); A small flow rate adjusting mechanism is further provided inside the valve body (12). According to the two-stage electronic expansion valve, the lower end portion of the valve body (12) and the first valve port (13) are in contact with each other in the small flow rate adjustment stage, and the fluid is transferred by a mesh-like silencing member. Since the internal vortex and bubbles are largely removed and dispersed, the conventional electronic expansion valve solves the problem that abnormal noise occurs when adjusting the small flow rate in the initial stage. At the same time, since the small flow rate adjustment is performed mainly by the second valve port (125) provided inside the valve body, the flow rate adjustment range is wider and the accuracy is higher under the condition of the same number of pulses.
Description
関連出願の相互参照
本願は、２０１５年１２月９日にて中国特許庁へ出願した、出願番号が２０１５１０９０８１４４．１で、発明の名称が「２段階式電子膨張弁」である中国特許出願の優先権を主張し、その内容を全て参照により本願に組み込むものとする。
This application is the priority of the Chinese patent application filed with the Chinese Patent Office on December 9, 2015 with the application number 201510908144.1 and the title of the invention is “two-stage electronic expansion valve” All rights are incorporated herein by reference.
技術分野
本発明は、冷凍装置の技術分野に関し、特に、インバータエアコンに用いられる電子膨張弁に関する。
TECHNICAL FIELD The present invention relates to a technical field of a refrigeration apparatus, and more particularly to an electronic expansion valve used for an inverter air conditioner.
電子膨張弁は、主として、インバータエアコンシステムに用いられ、高パルス周波数電流によって、モータが回動するように駆動し、減速機を直接動かし、ねじ継手、弁棒の伝達によって弁ニードルを昇降させ、弁口の開度を変えることにより、冷媒の流量を自動的に調節し、冷媒回路システムを始終最高の状態に保つ。 The electronic expansion valve is mainly used in inverter air conditioner systems, and is driven so as to rotate the motor by a high pulse frequency current, directly moves the speed reducer, raises and lowers the valve needle by transmission of a screw joint and a valve stem, By changing the opening of the valve opening, the flow rate of the refrigerant is automatically adjusted, and the refrigerant circuit system is kept at the highest level throughout.
図１を参照し、図１は、従来技術における電子膨張弁の構造模式図である。 Referring to FIG. 1, FIG. 1 is a structural schematic diagram of an electronic expansion valve in the prior art.
図１に示すように、該電子膨張弁は、主として、流量調節用の弁本体部分と駆動用のコイル部分とからなる。コイル部分は、モータ１’、減速機２’、モータ１’の回転運動をねじ３’の垂直運動に変換するねじ継手構造５’、ナット４’、減速機２’の外の歯車箱９’の外側にかしめられるモータハウジング６’を含む。弁本体部分は、弁座１４’、弁棒１５’、及び弁ニードル１２’の昇降を制御するベローズ１１’などの主要部材を含む。その動作原理は、モータ１’のローターが回転し、減速機２’が回動するように動かし、ねじ継手５’の伝達によって、ねじ３’が下向きに運動し、力伝達部材であるブッシュ１６’及び弁棒１５’を保持することで、弁ニードル１２’が下向きに運動し、この場合、ベローズ１１’が伸長しつつある状態にあることである。逆パルスが印加されると、ねじ３’が上向きに運動し、弁ニードル１２’は、ベローズ１１’の回復弾力及びシステムの圧力作用によって、連続して上向きに運動し、これにより、弁口１３’の開度を変えて流路面積を変化させ、そこで、流量を制御し、システムの加熱を調整する目的を達成する。 As shown in FIG. 1, the electronic expansion valve is mainly composed of a valve main body part for adjusting the flow rate and a coil part for driving. The coil portion includes a motor 1 ′, a speed reducer 2 ′, a screw joint structure 5 ′ that converts the rotational motion of the motor 1 ′ into a vertical motion of the screw 3 ′, a nut 4 ′, and a gear box 9 ′ outside the speed reducer 2 ′. A motor housing 6 'that is caulked on the outside. The valve body portion includes main members such as a valve seat 14 ', a valve stem 15', and a bellows 11 'that controls the raising and lowering of the valve needle 12'. The operating principle is that the rotor of the motor 1 ′ rotates and moves so that the speed reducer 2 ′ rotates, and the screw 3 ′ moves downward by the transmission of the screw joint 5 ′, and the bush 16 which is a force transmission member. By holding 'and the valve stem 15', the valve needle 12 'moves downward, and in this case, the bellows 11' is in an extending state. When a reverse pulse is applied, the screw 3 ′ moves upward, and the valve needle 12 ′ moves continuously upward due to the recovery elasticity of the bellows 11 ′ and the pressure action of the system, thereby causing the valve port 13. Vary the flow area by changing the opening of ', and achieve the purpose of controlling the flow rate and adjusting the heating of the system.
このような電子膨張弁構造において、全閉状態から初期段階の小流量調節まで、即ち、弁ニードル１２’が弁口１３’に接触してから徐々に弁口１３’から離れていく間、弁口１３’の開度が小さく、顕著に絞られるため、弁口部分を流れる流体が大幅に加速され、特定頻度の渦に起因する異常な騒音が発生し、ユーザの快適度を損なう。また、該構造の電子膨張弁は弁口１３’が大きいため、小流量時の調節範囲が狭く、より高い精度の調節に不利である。 In such an electronic expansion valve structure, from the fully closed state to the initial small flow rate adjustment, that is, while the valve needle 12 'contacts the valve port 13' and gradually moves away from the valve port 13 ', the valve Since the opening of the mouth 13 'is small and significantly restricted, the fluid flowing through the valve mouth portion is greatly accelerated, and abnormal noise due to a specific frequency vortex is generated, impairing the comfort level of the user. In addition, since the electronic expansion valve having this structure has a large valve opening 13 ', the adjustment range at a small flow rate is narrow, which is disadvantageous for higher precision adjustment.
よって、初期段階の小流量調節範囲内の異常な騒音を低減することができるとともに、小流量調節の幅及び精度を向上させることができる電子膨張弁をどのように構成するかは、当業者が緊急に解決すべき課題である。 Therefore, a person skilled in the art determines how to configure an electronic expansion valve that can reduce abnormal noise within the small flow rate adjustment range at the initial stage and improve the width and accuracy of the small flow rate adjustment. This is an urgent issue to be solved.
本発明の解决しようとする課題は、小流量調節範囲内に異常な騒音を低減することができるとともに、小流量調節時の調節精度を向上させることができる、インバータエアコンに用いられる電子膨張弁を提供することである。このため、本発明は、次の構成となる。 The problem to be solved by the present invention is to provide an electronic expansion valve used in an inverter air conditioner that can reduce abnormal noise within the small flow rate adjustment range and improve the adjustment accuracy during small flow rate adjustment. Is to provide. Therefore, the present invention has the following configuration.
モータと、モータの出力側に接続される減速機とを含み、弁棒にベローズが外挿し、ベローズは弁棒の往復運動に伴って伸縮する２段階式電子膨張弁であって、弁棒に動かされて第１弁口を開閉する弁体をさらに含み、弁体の内部に小流量調節機構がさらに設けられ、小流量調節機構は、弁棒の下端部と弁体の内部に設けられた第２弁口とからなる。 A two-stage electronic expansion valve that includes a motor and a speed reducer connected to the output side of the motor, the bellows is extrapolated to the valve stem, and expands and contracts as the valve rod reciprocates. A valve body that is moved to open and close the first valve port is further included, and a small flow rate adjusting mechanism is further provided inside the valve body, and the small flow rate adjusting mechanism is provided inside the lower end portion of the valve stem and the valve body. It consists of a second valve port.
弁体は筒状をなしており、その両端にそれぞれ第１のキャビティ及び第２のキャビティが設けられ、第２弁口が、第１のキャビティと第２のキャビティとの間に開設されている。 The valve body has a cylindrical shape, and a first cavity and a second cavity are provided at both ends thereof, and a second valve port is opened between the first cavity and the second cavity. .
第１のキャビティ内に遮断部がさらに設けられ、弁棒の端部が遮断部を通って第１のキャビティ内に伸び、弁棒と遮断部とが互いに運動可能に連結されているのを回り止め部材によって実現する。 A shut-off portion is further provided in the first cavity, the end of the valve stem extends into the first cavity through the shut-off portion, and the valve stem and the shut-off portion are movably connected to each other. Realized by a stop member.
回り止め部材がガスケットであり、弁棒に環状溝が設けられ、ガスケットが環状溝上に挟まれている。 The detent member is a gasket, an annular groove is provided in the valve stem, and the gasket is sandwiched between the annular grooves.
遮断部と弁体とが、溶接若しくは圧着により固定されている。 The blocking part and the valve body are fixed by welding or pressure bonding.
弁体は、大径部と小径部を含み、大径部の外周壁に流通部が設けられている。 The valve body includes a large-diameter portion and a small-diameter portion, and a circulation portion is provided on the outer peripheral wall of the large-diameter portion.
弁体には、第１のキャビティと弁体の外部空間とを連通させる流通孔が設けられている。 The valve body is provided with a flow hole that allows communication between the first cavity and the external space of the valve body.
第１のキャビティ内に第１の消音部材が設けられ、流通孔から流入する流体が、第１の消音部材によって消音された後、第２弁口から流出する。 A first silencing member is provided in the first cavity, and the fluid flowing in from the flow hole is silenced by the first silencing member and then flows out from the second valve port.
第２のキャビティ内に第２の消音部材が設けられている。 A second silencing member is provided in the second cavity.
弁体の底部を圧着変形させることで、第２の消音部材を第２のキャビティ内に固定する。 The second silencing member is fixed in the second cavity by compressing and deforming the bottom of the valve body.
弁体の底部には、弁体に密に嵌合し、第２の消音部材を第２のキャビティ内に固定する圧接部材が設けられている。 A pressure contact member is provided at the bottom of the valve body to closely fit the valve body and fix the second silencing member in the second cavity.
第２の消音部材は、上部消音部材及び下部消音部材を含む。 The second silencing member includes an upper silencing member and a lower silencing member.
第１のキャビティと第２のキャビティとの間に常時流通装置がさらに設けられ、第１のキャビティと第２のキャビティとの間に一定の流量が常時保持されている。 A constant flow device is further provided between the first cavity and the second cavity, and a constant flow rate is always maintained between the first cavity and the second cavity.
ガスケットは、開口部及び当接部を有し、当接部が環状溝の周壁に当接する。 The gasket has an opening and a contact portion, and the contact portion contacts the peripheral wall of the annular groove.
本発明に提供される２段階式電子膨張弁によれば、小流量調節段階において、弁体の下端部と第１弁口とが始終接触状態にあり、流体は、網目状の消音部材によってその内部の渦、泡が大幅に除去され分散されるため、従来の電子膨張弁では、初期段階の小流量調節時に異常な騒音が生じる問題を解決する。同時に、小流量調節は、主として弁体の内部に設けられた第２弁口によって行われるため、同じパルス数の条件下で、流量調節範囲がより広く、精度がより高い。 According to the two-stage electronic expansion valve provided in the present invention, the lower end portion of the valve body and the first valve port are in contact with each other in the small flow rate adjustment stage, and the fluid is moved by the mesh-like silencing member. Since the internal vortex and bubbles are largely removed and dispersed, the conventional electronic expansion valve solves the problem that abnormal noise occurs when adjusting the small flow rate in the initial stage. At the same time, since the small flow rate adjustment is performed mainly by the second valve port provided inside the valve body, the flow rate adjustment range is wider and the accuracy is higher under the condition of the same number of pulses.
当業者に本発明の技術的構成をよりよく理解してもらうために、以下、図面及び具体的な実施例を結合して本発明をさらに詳しく説明する。 In order that those skilled in the art may better understand the technical configuration of the present invention, the present invention will be described in more detail below in conjunction with the drawings and specific examples.
（第１の実施形態）
図２、図３を参照し、図２は、本発明に提供される２段階式電子膨張弁の第１の具体的な実施形態の構造模式図である。図３は、本発明の第１の実施形態の弁体の構造模式図である。
(First embodiment)
2 and 3, FIG. 2 is a structural schematic diagram of a first specific embodiment of the two-stage electronic expansion valve provided in the present invention. FIG. 3 is a structural schematic diagram of the valve body according to the first embodiment of the present invention.
図２に示すように、本発明に提供される２段階式電子膨張弁は、主として、流量調節用の弁本体部分と駆動用のコイル部分とからなる。コイル部分は、モータ１と、モータ１の出力側に接続され、下端にねじ継手構造５を介してねじ３が連結されている減速機２と、モータ１の回転運動をねじ３の往復運動に変換するねじ継手構造５とを含み、ねじ３と歯車箱９との間にナット４が連結され、減速機２に歯車箱９が外挿し、モータ１のモータハウジング６が歯車箱９の外側にかしめられる。 As shown in FIG. 2, the two-stage electronic expansion valve provided in the present invention mainly comprises a valve body part for flow rate adjustment and a coil part for driving. The coil portion is connected to the motor 1, the output side of the motor 1, the speed reducer 2 having a screw 3 connected to the lower end via a screw joint structure 5, and the rotational movement of the motor 1 to the reciprocating movement of the screw 3. A screw joint structure 5 to be converted, a nut 4 is connected between the screw 3 and the gear box 9, the gear box 9 is extrapolated to the speed reducer 2, and the motor housing 6 of the motor 1 is outside the gear box 9. It is caulked.
弁本体部分は弁座１４、弁棒１５を含み、弁棒１５にベローズ１１が外挿し、ベローズ１１が弁棒１５の往復運動に伴って伸縮し、弁体１２と弁棒１５とが互いに運動可能に連結されているため、弁棒の昇降によって弁体１２を昇降させることにより、弁座１４に設けられた第１弁口１３を開閉する。 The valve body portion includes a valve seat 14 and a valve stem 15, the bellows 11 is extrapolated to the valve stem 15, the bellows 11 expands and contracts as the valve stem 15 reciprocates, and the valve body 12 and the valve stem 15 move relative to each other. Since they are connected to each other, the first valve port 13 provided in the valve seat 14 is opened and closed by raising and lowering the valve body 12 by raising and lowering the valve stem.
本発明でいう「互いに運動可能に連結されている」とは、弁体と弁棒の両方が動作中に相対運動することができるが、お互いから脱出することができないことを意味する。 In the present invention, “connected to each other so as to be movable” means that both the valve body and the valve stem can move relative to each other during operation, but cannot escape from each other.
弁体１２の外観は、略筒状をなしており、大径部１２１と小径部１２２を有し、大径部１２１寄りの一端に第１のキャビティ１２３が開設され、小径部１２２寄りの一端に第２のキャビティ１２４が開設され、第１のキャビティ１２３と第２のキャビティ１２４との間に第２弁口１２５が開設されている。 The external appearance of the valve body 12 is substantially cylindrical, has a large diameter portion 121 and a small diameter portion 122, a first cavity 123 is opened at one end near the large diameter portion 121, and one end near the small diameter portion 122. The second cavity 124 is opened, and the second valve port 125 is opened between the first cavity 123 and the second cavity 124.
大径部１２１の外周壁には流通部１２１１が設けられ、本実施形態において、図３に示すように、該流通部１２１１は、流体が流通するために大径部１２１の外周壁に加工された若干の平面である。もちろん、当業者が本発明の発想に基づいて、流通部１２１１の形状を様々な設計、例えば、溝堀り、穴あけ等の方式により形成することができ、大径部１２１の上下両端間を流体が通過することを可能にすればよい。 A circulation part 1211 is provided on the outer peripheral wall of the large-diameter part 121. In this embodiment, as shown in FIG. 3, the circulation part 1211 is processed into the outer peripheral wall of the large-diameter part 121 so that fluid flows. It is a slightly flat surface. Of course, those skilled in the art can form the shape of the circulation part 1211 by various designs, for example, a method of grooving, drilling, etc. based on the idea of the present invention. May be allowed to pass through.
弁棒１５の下端部１５２が第１のキャビティ１２３内に伸びて第２弁口１２５に嵌合し、接触又は離反によって、第２弁口１２５の開閉を実現し、これにより流量調節を行う。弁棒１５と弁体１２とを連結するために、第１のキャビティ１２３内には遮断部１２６がさらに設けられ、遮断部１２６が大径部１２１の内壁に固定連結され、両者は溶接、圧着若しくは他の方式により固定されてもよい。 The lower end 152 of the valve stem 15 extends into the first cavity 123 and fits into the second valve port 125, and the second valve port 125 is opened and closed by contact or separation, thereby adjusting the flow rate. In order to connect the valve stem 15 and the valve body 12, a blocking portion 126 is further provided in the first cavity 123, and the blocking portion 126 is fixedly connected to the inner wall of the large-diameter portion 121. Or you may fix by another system.
弁棒１５の端部寄りの位置に環状溝１５１が設けられ、環状溝１５１内に回り止め部材が設けられ、回り止め部材によって、弁棒１５と遮断部１２６とが相対運動可能に連結されている状態を保つことが可能になる。本実施形態において、回り止め部材は具体的にはガスケット１２７であり、具体的には、弁棒１５が遮断部１２６による規制から解放されないように、ガスケット１２７が、環状溝１５１内に挟まれている。具体的な組立時に、弁棒１５を遮断部１２６に取り付けてから、ガスケット１２７を環状溝１５１に入れ、そして、遮断部１２６を弁体の大径部１２１に固定することができ、遮断部１２６及びガスケット１２７の双方によって、弁棒１５が上向きに移動する極限位置が制限されている。 An annular groove 151 is provided at a position near the end of the valve stem 15, and an anti-rotation member is provided in the annular groove 151, and the valve stem 15 and the blocking portion 126 are connected to each other so as to be capable of relative movement by the anti-rotation member. It becomes possible to keep the state. In this embodiment, the detent member is specifically a gasket 127. Specifically, the gasket 127 is sandwiched in the annular groove 151 so that the valve stem 15 is not released from the restriction by the blocking portion 126. Yes. At the time of specific assembly, the valve stem 15 is attached to the blocking portion 126, the gasket 127 is inserted into the annular groove 151, and the blocking portion 126 can be fixed to the large-diameter portion 121 of the valve body. And the extreme position where the valve stem 15 moves upward is restricted by both the gasket 127.
図４は、本発明の第１の実施形態のガスケットの構造模式図である。ガスケット１２７は、略「Ｃ」字形をなしており、開口部１２７２を有し、弁棒の環状溝１５１に挿入される。ガスケット１２７の内部に３つの当接部１２７１が設けられ、組立後に環状溝１５１の周壁に密着し、隣接する当接部１２７１間に切り欠き部がさらに設けられている。もちろん、図４は、具体的な一実施形態として、当業者が該技術的示唆に基づいて、若干の変動が可能であり、例えば、切り欠き部を省略して、当接部１２７１が一体となるように繋がり、これによっても同様に発明の目的を実現することができる。また、環状溝１５１への挟持又は固定は、ガスケットを用いることに限らず、例えば、環状溝１５１に貫通孔を設けて、位置決めピンを用いることによっても、同様に弁棒１５と遮断部１２６とを制限連結することができる。このような位置決め方式も、明らかに本発明の保護範囲内に含まれるべきである。 FIG. 4 is a structural schematic diagram of the gasket according to the first embodiment of the present invention. The gasket 127 has a substantially “C” shape, has an opening 1272, and is inserted into the annular groove 151 of the valve stem. Three abutting portions 1271 are provided inside the gasket 127, are in close contact with the peripheral wall of the annular groove 151 after assembling, and a notch portion is further provided between the adjacent abutting portions 1271. Of course, FIG. 4 shows a specific embodiment in which a person skilled in the art can make a slight variation based on the technical suggestion. For example, the notch portion is omitted and the contact portion 1271 is integrated. It is connected so that the object of the invention can be realized similarly. The clamping or fixing to the annular groove 151 is not limited to using a gasket. For example, by providing a through hole in the annular groove 151 and using a positioning pin, the valve stem 15 and the blocking portion 126 are similarly provided. Can be concatenated. Such a positioning method should obviously also be included in the protection scope of the present invention.
弁体１２の小径部１２２の外周壁に流通孔１２２１が開設され、流通孔１２２１の数は、１つ又は複数であることができ、流通孔１２２１は、第１のキャビティ１２３と弁体１２の外部空間とを連通させることで、流体が流通孔１２２１から第１のキャビティ１２３に流入することができる。流通孔１２２１と弁口１２５との間の第１のキャビティ１２３内に第１の消音部材１２８がさらに設けられ、流通孔１２２１から流入する流体は、第１の消音部材１２８によって消音された後、第２弁口１２５から流出する。第１の消音部材１２８は環状体とされることができ、図３に示すように、第１のキャビティ１２３に充填される。 A flow hole 1221 is formed in the outer peripheral wall of the small-diameter portion 122 of the valve body 12, and the number of the flow holes 1221 can be one or more, and the flow holes 1221 are connected to the first cavity 123 and the valve body 12. The fluid can flow into the first cavity 123 from the flow hole 1221 by communicating with the external space. A first silencing member 128 is further provided in the first cavity 123 between the circulation hole 1221 and the valve port 125, and the fluid flowing in from the circulation hole 1221 is silenced by the first silencing member 128, It flows out from the second valve port 125. The first silencing member 128 may be an annular body, and is filled in the first cavity 123 as shown in FIG.
小径部１２２の下端部に第２のキャビティ１２４が設けられ、第２のキャビティ１２４内に第２の消音部材１２９が設けられ、組立時に、圧着方式により小径部１２２の下端部を変形させて、第２の消音部材１２９を第２のキャビティ１２４内に固定することができる。 A second cavity 124 is provided at the lower end portion of the small diameter portion 122, and a second silencing member 129 is provided in the second cavity 124. At the time of assembly, the lower end portion of the small diameter portion 122 is deformed by a crimping method, The second sound deadening member 129 can be fixed in the second cavity 124.
上記第１の消音部材１２８及び第２の消音部材１２９は、多孔質のふるい網若しくは巻回された金属線、粉末焼結などの方式で作ることができ、本発明では、消音部材の材質又は形状を一切限定していない。 The first silencing member 128 and the second silencing member 129 can be made by a method such as a porous sieve net or a wound metal wire, powder sintering, etc. In the present invention, the material of the silencing member or The shape is not limited at all.
２段階式電子膨張弁が除湿機能を持つように、通常、弁体１２は、第１弁口１３が閉じられた時にも一定の流量を有するようにされる必要がある。この目的を実現するために、本実施形態において、第１のキャビティ１２３と第２のキャビティ１２４との間に常時流通装置がさらに設けられ、本実施形態において、常時流通装置は常時流通孔１３０であり、このように、２段階式電子膨張弁の２本の連結管の間には一部の流量が常時流通中である。もちろん、第１弁口１３が閉じられた時にも一定の流量があるように、その方法は上記常時流通孔１３０を開設することに限らず、これに基づいて、様々な技術的手段に置き換えてもよく、例えば、小径部１２２に斜孔を加工し、第２のキャビティ１２４を直接弁体１２の外部に連通させるか、或いは、溝を開設することで、第１弁口１３の内周壁に若干の流通溝を加工することによっても、同様に、弁本体が閉じられた時にも一定の流量を有することを実現することができる。このような本発明の発想に基づく若干の置き換え手段の使用も、本発明の保護範囲内にあることは、当業者が理解すべきである。 In order for the two-stage electronic expansion valve to have a dehumidifying function, the valve body 12 usually needs to have a constant flow rate even when the first valve port 13 is closed. In order to achieve this object, in this embodiment, a constant flow device is further provided between the first cavity 123 and the second cavity 124. In this embodiment, the constant flow device is a constant flow hole 130. In this way, a part of the flow rate is always flowing between the two connecting pipes of the two-stage electronic expansion valve. Of course, the method is not limited to the opening of the constant flow hole 130 so that a constant flow rate is maintained even when the first valve port 13 is closed. For example, an oblique hole is machined in the small diameter portion 122, and the second cavity 124 is directly communicated with the outside of the valve body 12, or a groove is formed, so that the inner peripheral wall of the first valve port 13 is formed. Similarly, by processing some flow grooves, it is possible to achieve a constant flow rate even when the valve body is closed. It should be understood by those skilled in the art that the use of some replacement means based on the idea of the present invention is within the protection scope of the present invention.
このように、弁棒１５の下端部１５２と弁体１２における第２弁口１２５との間に小流量調節機構が形成されている。 Thus, a small flow rate adjusting mechanism is formed between the lower end portion 152 of the valve stem 15 and the second valve port 125 in the valve body 12.
弁棒１５が上から下へ変位する場合、ベローズ１１が伸長状態にあり、弁体１２は圧力差作用を受け、遮断部１２６の下端面が、始終、ガスケット１２７の上端面に貼り合わせられ、弁体１２が極限位置まで下向きに移動し、第１弁口１３と接触した後、弁棒１５は下向きに移動し続け、この場合、ガスケット１２７は、弁棒１５とともに下へ移動し、弁棒１５の下端部１５２が第２弁口１２５に接触してシールを形成するまで、遮断部１２６への貼り合わせから解放され、この場合、２段階式電子膨張弁が閉状態にある。 When the valve stem 15 is displaced from the top to the bottom, the bellows 11 is in an extended state, the valve body 12 is subjected to a pressure differential action, and the lower end surface of the blocking portion 126 is bonded to the upper end surface of the gasket 127 throughout. After the valve body 12 moves downward to the extreme position and contacts the first valve port 13, the valve stem 15 continues to move downward. In this case, the gasket 127 moves downward together with the valve stem 15, 15 is released from bonding to the blocking portion 126 until the lower end portion 152 of the 15 contacts the second valve port 125 to form a seal, in which case the two-stage electronic expansion valve is in a closed state.
弁開時に、モータ１に通電し、ベローズ１１が収縮し、弁棒１５を下から上へ変位するように動かし、弁体１２は圧力差作用を受けているため、弁体１２の下端面が依然として第１弁口１３と接触を保ち、弁棒１５は、ガスケット１２７の上端面が遮断部１２６の下端面に接触するまで、上へ移動し続ける。弁棒１５が上へ移動し続けると、遮断部１２６を連れて上へ移動させ、この場合、弁体全体が上向きに移動し始める。モータ１が全開パルスとなるように開かれた場合、２段階式電子膨張弁全体が全開状態になる。 When the valve is opened, the motor 1 is energized, the bellows 11 contracts, the valve stem 15 is moved so as to be displaced from the bottom to the top, and the valve body 12 is subjected to a pressure differential action. Still in contact with the first valve port 13, the valve stem 15 continues to move upward until the upper end surface of the gasket 127 contacts the lower end surface of the blocking portion 126. When the valve stem 15 continues to move upward, the valve stem 15 is moved upward along with the blocking portion 126. In this case, the entire valve body starts to move upward. When the motor 1 is opened so as to have a fully open pulse, the entire two-stage electronic expansion valve is fully opened.
上記過程において、ガスケット１２７の上端面と遮断部１２６の下端面とが接触するまでの調節距離において、流量は、主として弁棒１５の下端部１５２と弁体上の第２弁口１２５との間の開度によって制御され、即ち、小流量調節段階であり、弁口が小さくなるため、同じパルス数の条件下で、流量の調節範囲がより広い。一方、弁棒１５は、弁体１２を連れて全体として上向きに移動し、この場合、流量は、主として弁体１２と第１弁口１３との間の開度によって制御され、即ち、大流量調節段階である。 In the above process, the flow rate is mainly between the lower end portion 152 of the valve stem 15 and the second valve port 125 on the valve body at an adjustment distance until the upper end surface of the gasket 127 comes into contact with the lower end surface of the blocking portion 126. Since the valve opening is small, the flow rate adjustment range is wider under the same number of pulses. On the other hand, the valve stem 15 moves upward together with the valve body 12, and in this case, the flow rate is controlled mainly by the opening between the valve body 12 and the first valve port 13, that is, a large flow rate. It is an adjustment stage.
上述したように、小流量調節段階では、弁体１２の下端部と第１弁口１３とが、始終、接触状態にあり、この場合、流体が流通孔１２２１から流入し、第１の消音部材１２８によって消音された後、第２弁口１２５を流れ、そして、第２の消音部材１２９によって再消音され、流体が消音部材を流れる時、複数層の網目の作用により十分に分散され、これにより、ハウリングのような渦を除去し、騒音を低減する。 As described above, in the small flow rate adjustment stage, the lower end portion of the valve body 12 and the first valve port 13 are always in contact with each other. In this case, the fluid flows from the flow hole 1221 and the first silencing member After being silenced by 128, it flows through the second valve port 125 and is re-silenced by the second silencer member 129, and when the fluid flows through the silencer member, it is sufficiently dispersed by the action of the multi-layered mesh, thereby Remove vortices such as howling and reduce noise.
つまり、本発明に提供される２段階式電子膨張弁によれば、流体は、網目状の消音部材によってその内部の渦、泡が大幅に除去され分散されるため、従来の電子膨張弁では、初期段階の小流量調節時に異常な騒音が生じる問題を解決する。同時に、小流量調節は、主として弁体１２の内部に設けられた第２弁口１２５によって行われるため、同じパルス数の条件下で、流量調節範囲がより広く、精度がより高い。 That is, according to the two-stage electronic expansion valve provided in the present invention, the fluid is greatly removed and dispersed by the mesh-like silencing member, and the conventional electronic expansion valve To solve the problem that abnormal noise occurs when adjusting the small flow rate in the initial stage. At the same time, since the small flow rate adjustment is performed mainly by the second valve port 125 provided inside the valve body 12, the flow rate adjustment range is wider and the accuracy is higher under the condition of the same number of pulses.
（第２の実施形態）
以下、図５を結合しながら本発明の第２の実施形態を説明する。図５は、本発明に提供される２段階式電子膨張弁の第２の具体的な実施形態の構造模式図である。本実施形態と第１の実施形態との相違を説明するために、構造及び機能が同じな部材は、同一の符号で示される。
(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a structural schematic diagram of a second specific embodiment of the two-stage electronic expansion valve provided in the present invention. In order to explain the difference between the present embodiment and the first embodiment, members having the same structure and function are denoted by the same reference numerals.
２段階式電子膨張弁は、モータ１と、モータ１の出力側に接続され、下端にねじ継手構造５を介してねじ３が連結されている減速機２と、モータ１の回転運動をねじ３の往復運動に変換するねじ継手構造５とを含み、ねじ３と歯車箱９との間にナット４が連結され、減速機２に歯車箱９が外挿し、モータ１のモータハウジング６が歯車箱９の外側にかしめられる。 The two-stage electronic expansion valve includes a motor 1, a speed reducer 2 connected to the output side of the motor 1, and a screw 3 connected to a lower end via a screw joint structure 5, and a rotational movement of the motor 1 to the screw 3. And a screw joint structure 5 for converting the reciprocating motion of the motor 1. A nut 4 is connected between the screw 3 and the gear box 9, the gear box 9 is extrapolated to the speed reducer 2, and the motor housing 6 of the motor 1 is the gear box. 9 is caulked outside.
弁本体部分は、弁座１４、弁棒１５を含み、弁棒１５にベローズ１１が外挿し、ベローズ１１が弁棒１５の往復運動に伴って伸縮し、弁体１２Ａと弁棒１５とが互いに運動可能に連結されているため、弁棒の昇降によって弁体１２Ａを昇降させることにより、弁座１４に設けられた第１弁口１３を開閉する。 The valve body portion includes a valve seat 14 and a valve stem 15, the bellows 11 is extrapolated to the valve stem 15, the bellows 11 expands and contracts as the valve stem 15 reciprocates, and the valve body 12 </ b> A and the valve stem 15 are mutually connected. Since it is connected so that it can move, the 1st valve port 13 provided in the valve seat 14 is opened and closed by raising and lowering the valve body 12A by raising and lowering the valve stem.
上記部材のうち、弁体１２の構造以外の部材は、第１の実施形態と同様であり、図２を参照して理解することができ、ここではその説明を省略する。 Among the members described above, members other than the structure of the valve body 12 are the same as those in the first embodiment, and can be understood with reference to FIG.
本実施形態において、弁体１２Ａ全体の外観も、略２段式の筒状構造をなしており、大径部１２１Ａと小径部１２２Ａを有し、弁体１２Ａの上下両端にそれぞれ第１のキャビティ１２３Ａ及び第２のキャビティ１２４Ａが開設され、第１のキャビティ１２３Ａと第２のキャビティ１２４Ａとの間に第２弁口１２５Ａが開設されている。 In the present embodiment, the overall appearance of the valve body 12A also has a substantially two-stage cylindrical structure, which has a large diameter portion 121A and a small diameter portion 122A, and first cavities at both upper and lower ends of the valve body 12A. 123A and the second cavity 124A are opened, and a second valve port 125A is opened between the first cavity 123A and the second cavity 124A.
大径部１２１Ａの外周壁には流通部１２１１Ａが設けられ、本実施形態において、流通部１２１１Ａは、流体が流通するために大径部１２１Ａの外周壁に加工された若干の平面である。もちろん、当業者が本発明の発想に基づいて、流通部１２１１Ａの形状を様々な設計、例えば、溝堀り、穴あけ等の方式により形成することができ、大径部１２１Ａの上下両端間を流体が通過することを可能にすればよい。 A circulation portion 1211A is provided on the outer peripheral wall of the large-diameter portion 121A. In this embodiment, the circulation portion 1211A is a slight flat surface formed on the outer peripheral wall of the large-diameter portion 121A so that fluid flows. Of course, a person skilled in the art can form the shape of the flow part 1211A by various designs, for example, a method of grooving, drilling, etc., based on the idea of the present invention. May be allowed to pass through.
弁棒１５の下端部１５２Ａが第１のキャビティ１２３Ａ内に伸びて、第２弁口１２５Ａとの間に流量調節機構が形成され、下端部１５２Ａと第２弁口１２５Ａとの接触又は離反によって、第２弁口１２５Ａの開閉を実現し、これにより流量調節を行う。弁棒１５と弁体１２Ａとを連結するために、第１のキャビティ１２３Ａ内には遮断部１２６Ａがさらに設けられ、遮断部１２６Ａが大径部１２１Ａの内壁に固定連結され、両者は溶接、カシメ若しくは他の方式により固定されてもよい。 A lower end portion 152A of the valve stem 15 extends into the first cavity 123A, and a flow rate adjusting mechanism is formed between the lower end portion 152A and the second valve port 125A. The opening and closing of the second valve port 125A is realized, thereby adjusting the flow rate. In order to connect the valve stem 15 and the valve body 12A, a blocking portion 126A is further provided in the first cavity 123A, and the blocking portion 126A is fixedly connected to the inner wall of the large-diameter portion 121A. Or you may fix by another system.
弁棒１５の下端部寄りの位置に環状溝１５１Ａが設けられ、環状溝１５１Ａ内に回り止め部材が設けられ、回り止め部材によって、弁棒１５と遮断部１２６Ａとが相対運動可能に連結されている状態を保つことが可能になる。第１の実施形態に類似して、本実施形態の回り止め部材も、ガスケット１２７Ａであることができ、その構造は第１の実施形態におけるガスケット１２７と同様であり、図４を参照して理解することができ、ここではその説明を省略する。遮断部１２６Ａ及びガスケット１２７Ａの双方によって、弁棒１５が上向きに移動する極限位置が制限されている。 An annular groove 151A is provided at a position near the lower end of the valve stem 15, a rotation preventing member is provided in the annular groove 151A, and the valve stem 15 and the blocking portion 126A are connected to each other so as to be capable of relative movement. It becomes possible to keep the state. Similar to the first embodiment, the anti-rotation member of this embodiment can also be a gasket 127A, the structure of which is similar to that of the gasket 127 in the first embodiment, and is understood with reference to FIG. The description thereof is omitted here. The extreme position where the valve stem 15 moves upward is limited by both the blocking portion 126A and the gasket 127A.
もちろん、第１の実施形態と同様に、当業者が該技術的示唆に基づいて、回り止め部材に対して若干の変動が可能であり、環状溝１５１への挟持又は固定も、ガスケットを用いることに限らず、例えば、環状溝１５１に貫通孔を設けて、位置決めピンを用いることによっても、同様に弁棒１５と遮断部１２６とを制限連結することができる。このような位置決め方式も、明らかに本発明の保護範囲内に含まれるべきである。 Of course, as in the first embodiment, a person skilled in the art can slightly change the anti-rotation member based on the technical suggestion, and the gasket is also used for clamping or fixing to the annular groove 151. For example, the valve rod 15 and the blocking portion 126 can be similarly limitedly connected by providing a through hole in the annular groove 151 and using a positioning pin. Such a positioning method should obviously also be included in the protection scope of the present invention.
弁体１２Ａの大径部１２１Ａの外周壁に流通孔１２１２Ａが開設され、流通孔１２１２Ａの数は、１つ又は複数であることができ、流通孔１２１２Ａは、第１のキャビティ１２３Ａと弁体１２Ａの外部空間とを連通させることで、流体が弁体１２Ａの外部から流通孔１２１２Ａを経て第１のキャビティ１２３Ａに流入することができる。 A flow hole 1212A is formed in the outer peripheral wall of the large-diameter portion 121A of the valve body 12A, and the number of the flow holes 1212A can be one or more. The flow hole 1212A includes the first cavity 123A and the valve body 12A. By communicating with the external space, the fluid can flow from the outside of the valve body 12A into the first cavity 123A through the flow hole 1212A.
小径部１２２Ａの下端部に第２のキャビティ１２４Ａが設けられ、第２のキャビティ１２４Ａ内に第２の消音部材１２８Ａが設けられ、第２の消音部材１２８Ａを第２のキャビティ１２４Ａ内に固定するために、圧接部材１２９Ａがさらに設けられ、圧接部材１２９Ａが小径部１２２Ａの下端の内壁に密に嵌合し、これにより、第２の消音部材１２８Ａを第２のキャビティ１２４Ａ内に固定する。 A second cavity 124A is provided at the lower end of the small-diameter portion 122A, a second silencer 128A is provided in the second cavity 124A, and the second silencer 128A is fixed in the second cavity 124A. Further, a pressure contact member 129A is further provided, and the pressure contact member 129A closely fits to the inner wall at the lower end of the small diameter portion 122A, thereby fixing the second silencing member 128A in the second cavity 124A.
第２の消音部材１２８Ａは、多孔質のふるい網若しくは巻回された金属線、粉末焼結などの方式で作ることができ、本発明では、消音部材の材質又は形状を一切限定していない。 The second silencing member 128A can be made by a method such as a porous sieve net, a wound metal wire, or powder sintering. In the present invention, the material or shape of the silencing member is not limited at all.
第１の実施形態と同様に、２段階式電子膨張弁が除湿機能を持つように、弁体１２Ａは、第１弁口１３が閉じられた時にも一定の流量を有するようにされる必要がある。この目的を実現するために、第１のキャビティ１２３と第２のキャビティ１２４との間に常時流通孔（図示せず）が設けられてもよく、このように、２段階式電子膨張弁の２本の連結管の間には一部の流量が常時流通中である。もちろん、第１弁口１３が閉じられた時にも一定の流量があるように、その方法は上記常時流通孔を開設することに限らず、これに基づいて、様々な技術的手段に置き換えてもよく、例えば、小径部１２２Ａに斜孔を加工し、第２のキャビティ１２４Ａを直接弁体１２Ａの外部に連通させるか、或いは、溝を開設することで、第１弁口１３の内周壁に若干の流通溝を加工することによっても、同様に、弁本体が閉じられた時にも一定の流量を有することを実現することができる。このような本発明の発想に基づく若干の置き換え手段の使用も、本発明の保護範囲内にあることは、当業者が理解すべきである。 Similar to the first embodiment, the valve body 12A needs to have a constant flow rate even when the first valve port 13 is closed so that the two-stage electronic expansion valve has a dehumidifying function. is there. In order to realize this purpose, a constant flow hole (not shown) may be provided between the first cavity 123 and the second cavity 124, and thus, the two-stage electronic expansion valve 2 is provided. A part of the flow rate is always flowing between the connecting pipes of the book. Of course, the method is not limited to the opening of the constant flow hole so that there is a constant flow rate even when the first valve port 13 is closed, and various technical means may be used based on this method. Well, for example, an oblique hole is machined in the small-diameter portion 122A, and the second cavity 124A is directly communicated with the outside of the valve body 12A, or a groove is formed, so that the inner peripheral wall of the first valve port 13 is slightly opened. Similarly, it is possible to realize a constant flow rate even when the valve body is closed. It should be understood by those skilled in the art that the use of some replacement means based on the idea of the present invention is within the protection scope of the present invention.
このように、弁棒１５の下端部１５２Ａと弁体１２Ａにおける第２弁口１２５Ａとの間に小流量調節機構が形成されている。 Thus, a small flow rate adjusting mechanism is formed between the lower end portion 152A of the valve stem 15 and the second valve port 125A in the valve body 12A.
弁棒１５が上から下へ変位する場合、ベローズ１１が伸長状態となり、弁体１２は圧力差作用を受け、遮断部１２６の下端面が、始終、回り止め部材(ガスケット１２７Ａ)の上端に貼り合わせられ、弁体１２Ａが極限位置まで下向きに移動し、第１弁口１３と接触した後、弁棒１５は下向きに移動し続け、この場合、ガスケット１２７Ａは、弁棒１５とともに下へ移動し、弁棒１５の下端部１５２Ａが第２弁口１２５Ａに接触してシールを形成するまで、遮断部１２６Ａへの貼り合わせから解放され、この場合、２段階式電子膨張弁が閉状態にある。 When the valve stem 15 is displaced from the top to the bottom, the bellows 11 is in an extended state, the valve body 12 is subjected to a pressure differential action, and the lower end surface of the blocking portion 126 is attached to the upper end of the detent member (gasket 127A) throughout. After the valve body 12A moves downward to the extreme position and contacts the first valve port 13, the valve stem 15 continues to move downward. In this case, the gasket 127A moves downward together with the valve stem 15. Until the lower end 152A of the valve stem 15 comes into contact with the second valve port 125A to form a seal, the sticking to the blocking portion 126A is released, and in this case, the two-stage electronic expansion valve is in a closed state.
弁開時に、モータ１に通電し、ベローズ１１が収縮し、弁棒１５が上から下へ変位し、弁体１２Ａは圧力差作用を受けているため、弁体１２Ａの下端面が依然として第１弁口１３と接触を保ち、弁棒１５は、ガスケットの回り止め部材(１２７Ａ)の上端が遮断部１２６Ａの下端面に接触するまで、上へ移動し続ける。弁棒１５が上へ移動し続けると、遮断部１２６Ａを連れて上へ移動させ、この場合、弁体全体が上向きに移動し始める。モータ１が全開パルスとなるように開かれた場合、２段階式電子膨張弁全体が全開状態になる。 When the valve is opened, the motor 1 is energized, the bellows 11 contracts, the valve stem 15 is displaced from the top to the bottom, and the valve body 12A is subjected to a pressure differential action, so the lower end surface of the valve body 12A is still the first. Maintaining contact with the valve port 13, the valve stem 15 continues to move upward until the upper end of the gasket detent member (127A) contacts the lower end surface of the blocking portion 126A. When the valve stem 15 continues to move upward, the valve stem 15A is moved upward along with the blocking portion 126A. In this case, the entire valve body starts to move upward. When the motor 1 is opened so as to have a fully open pulse, the entire two-stage electronic expansion valve is fully opened.
上記過程において、回り止め部材(ガスケット１２７)の上端面と遮断部１２６Ａの下端面とが接触するまでの調節距離において、流量は、主として弁棒１５の下端部１５２Ａと弁体上の第２弁口１２５Ａとの間の開度によって制御され、即ち、小流量調節段階であり、弁口が小さくなるため、同じパルス数の条件下で、流量の調節範囲がより広い。一方、弁棒１５は、弁体１２を連れて全体として上向きに移動し、この場合、流量は、主として弁体１２Ａと第１弁口１３との間の開度によって制御され、即ち、大流量調節段階である。 In the above process, at the adjustment distance until the upper end surface of the detent member (gasket 127) comes into contact with the lower end surface of the blocking portion 126A, the flow rate is mainly the second valve on the lower end portion 152A of the valve stem 15 and the valve body. It is controlled by the opening degree with respect to the port 125A, that is, it is a small flow rate adjustment stage, and since the valve port becomes small, the flow rate adjustment range is wider under the same pulse number conditions. On the other hand, the valve stem 15 moves upward as a whole with the valve body 12, and in this case, the flow rate is mainly controlled by the opening between the valve body 12A and the first valve port 13, that is, a large flow rate. It is an adjustment stage.
上述したように、在小流量調節段階では、弁体１２の下端部と第１弁口１３とが、始終、接触状態にあり、この場合、流体が流通孔１２１２Ａから第１のキャビティ１２３Ａに流入し、絞られた後第２弁口１２５Ａを流れ、そして消音部材１２８Ａによって消音され、流体が消音部材を流れる時、複数層の網目の作用により十分に分散され、これにより、ハウリングのような渦を除去し、騒音を低減する。 As described above, in the small flow rate adjustment stage, the lower end portion of the valve body 12 and the first valve port 13 are always in contact with each other, and in this case, the fluid flows into the first cavity 123A from the flow hole 1212A. Then, after being squeezed, it flows through the second valve port 125A and is silenced by the silencing member 128A, and when the fluid flows through the silencing member, the fluid is sufficiently dispersed by the action of the mesh of the plurality of layers. To reduce noise.
つまり、本発明に提供される２段階式電子膨張弁によれば、流体は、網目状の消音部材によってその内部の渦、泡が大幅に除去され分散されるため、従来の電子膨張弁では、初期段階の小流量調節時に異常な騒音が生じる問題を解決する。同時に、小流量調節は、主として弁体１２Ａの内部に設けられた第２弁口１２５Ａによって行われるため、同じパルス数の条件下で、流量調節範囲がより広く、精度がより高い。 That is, according to the two-stage electronic expansion valve provided in the present invention, the fluid is greatly removed and dispersed by the mesh-like silencing member, and the conventional electronic expansion valve To solve the problem that abnormal noise occurs when adjusting the small flow rate in the initial stage. At the same time, since the small flow rate adjustment is performed mainly by the second valve port 125A provided inside the valve body 12A, the flow rate adjustment range is wider and the accuracy is higher under the condition of the same number of pulses.
（第３の実施形態）
第３の実施形態では、第２の消音部材１２８Ａが第２のキャビティ１２４Ａ内に固定されるのは、圧着方式によって実現され、即ち、図６に示すように、小径部１２２Ａの下端部１２２２Ａを圧着して変形させることで、第２の消音部材１２８Ａを固定し、つまり、第１の実施形態における第２の消音部材の固定方式に類似した方式を用いる点で、第２の実施形態と相違する。本実施形態は、それ以外の部分が第２の実施形態と同様であり、ここではその説明を省略する。
(Third embodiment)
In the third embodiment, the second silencing member 128A is fixed in the second cavity 124A by a crimping method, that is, as shown in FIG. 6, the lower end portion 1222A of the small diameter portion 122A is provided. It is different from the second embodiment in that the second silencing member 128A is fixed by being crimped and deformed, that is, a method similar to the fixing method of the second silencing member in the first embodiment is used. To do. In this embodiment, the other parts are the same as those in the second embodiment, and the description thereof is omitted here.
（第４の実施形態）
第４の実施形態では、第２の消音部材が、具体的には、上部消音部材１２８１Ａ及び下部消音部材１２８２Ａという２層に分けられ、消音部材を第２のキャビティ１２４Ａ内に固定するために、圧接部材１２９Ａがさらに設けられ、圧接部材１２９Ａが小径部１２２Ａの下端の内壁に密に嵌合し、これにより、上部消音部材１２８１Ａ及び下部消音部材１２８２Ａを第２のキャビティ１２４Ａ内に固定する点で、第２の実施形態と相違する。もちろん、消音部材は２層に限らず、２層以上であってもよく、これによっても本発明の目的を実現できることは、当業者が理解することができる。本実施形態は、それ以外の部分について第２の実施形態の対応する説明を参照することができ、ここではその説明を省略する。
(Fourth embodiment)
In the fourth embodiment, the second silencing member is specifically divided into two layers, an upper silencing member 1281A and a lower silencing member 1282A, and in order to fix the silencing member in the second cavity 124A, A pressure contact member 129A is further provided, and the pressure contact member 129A is closely fitted to the inner wall at the lower end of the small diameter portion 122A, thereby fixing the upper silencer member 1281A and the lower silencer member 1282A in the second cavity 124A. This is different from the second embodiment. Of course, the sound deadening member is not limited to two layers, but may be two or more layers, and it can be understood by those skilled in the art that the object of the present invention can be realized by this. In the present embodiment, the corresponding description of the second embodiment can be referred to for other parts, and the description thereof is omitted here.
なお、本発明に現れた「上」、「下」、「左」、「右」等の方位を表す用語は、明細書の図面に示す構造に基づくものであり、本発明の保護範囲を制限していると理解するべきではない。 It should be noted that terms such as “upper”, “lower”, “left”, “right” and the like appearing in the present invention are based on the structure shown in the drawings of the specification, and limit the protection scope of the present invention. You should not understand that you are.
以上、本発明に提供されるインバータエアコンに用いられる電子膨張弁を詳しく紹介しした。本文では、具体例を用いて本発明の原理及び実施形態を説明したが、以上の実施例の説明は、本発明の方法及び主旨を理解してもらうためのものに過ぎない。当業者であれば、本発明の原則から逸脱しない前提において本発明に若干の改良や手直しが可能であることは指摘されるべきである。これら改良や手直しも、本発明の権利範囲内に含まれている。 The electronic expansion valve used in the inverter air conditioner provided in the present invention has been described in detail above. In this text, the principle and embodiment of the present invention have been described using specific examples. However, the above description of the examples is merely for the purpose of understanding the method and the gist of the present invention. It should be pointed out to those skilled in the art that the present invention can be slightly improved and modified without departing from the principle of the present invention. These improvements and modifications are also included in the scope of the present invention.
Claims (14)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510908144.1A CN106855128A (en) | 2015-12-09 | 2015-12-09 | Two-period form electric expansion valve |
| CN201510908144.1 | 2015-12-09 | ||
| PCT/CN2016/109069 WO2017097232A1 (en) | 2015-12-09 | 2016-12-08 | Two-stage electronic expansion valve |
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| JP2019504253A true JP2019504253A (en) | 2019-02-14 |
| JP6778752B2 JP6778752B2 (en) | 2020-11-04 |
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| JP (1) | JP6778752B2 (en) |
| KR (1) | KR102171202B1 (en) |
| CN (1) | CN106855128A (en) |
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| JP7466485B2 (en) | 2021-03-24 | 2024-04-12 | 株式会社鷺宮製作所 | Motor-operated valve |
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Also Published As
| Publication number | Publication date |
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| WO2017097232A1 (en) | 2017-06-15 |
| KR102171202B1 (en) | 2020-10-29 |
| JP6778752B2 (en) | 2020-11-04 |
| CN106855128A (en) | 2017-06-16 |
| KR20180091852A (en) | 2018-08-16 |
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