WO2019154342A1 - 电子膨胀阀 - Google Patents
电子膨胀阀 Download PDFInfo
- Publication number
- WO2019154342A1 WO2019154342A1 PCT/CN2019/074514 CN2019074514W WO2019154342A1 WO 2019154342 A1 WO2019154342 A1 WO 2019154342A1 CN 2019074514 W CN2019074514 W CN 2019074514W WO 2019154342 A1 WO2019154342 A1 WO 2019154342A1
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- WIPO (PCT)
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- valve
- head
- electronic expansion
- port
- hole
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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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Definitions
- the present application relates to the technical field related to electronic valves, and in particular to an electronic expansion valve.
- the electronic expansion valve adapts to the development requirements of refrigeration electromechanical integration, provides conditions for the intelligentization of the refrigeration system, and is a promising self-control adjustment component.
- the electronic expansion valve uses the principle of a stepping motor to drive the magnetic rotor component forward and reverse by the coil, and converts the rotary operation of the magnetic rotor component into the up and down movement of the push rod, and the push rod drives the valve needle connected thereto to rise or fall. Control the flow rate of the refrigerant.
- the commonly used electronic expansion valve usually has two valve ports for liquid circulation, respectively, and a first valve port disposed on the valve body, and a second valve port disposed on the valve head, wherein the valve body A valve port is controlled by a valve head to open and close, and a second valve port on the valve head has a valve needle disposed in the valve head to control opening and closing, thereby realizing two-stage flow regulation.
- the valve needle realizes the precise flow control of the electronic expansion valve by controlling the opening and closing of the second valve port, and the valve head ensures the opening and closing of the second valve port to ensure that the electronic expansion valve is fully opened. Flow rate, large opening.
- the first valve port on the valve body When the current electronic expansion valve is in operation, when the first valve port on the valve body is opened to achieve a large flow communication, a pressure difference is formed on the inlet and outlet sides of the valve body, and the second valve port on the valve head is formed.
- the caliber is generally within 2.0 mm, and the diameter of the first valve port on the valve body is generally above 8.0 mm, so that it is difficult to ensure the CV value requirement when the electronic expansion valve is fully opened.
- An electronic expansion valve includes a valve body, a valve head disposed in the valve body, the valve body having a valve chamber and a first valve port communicating with the valve chamber, the valve head being disposed at the a valve chamber for opening and closing a first valve port on the valve body, the valve head having a second valve port communicating with the first valve port, and a second valve port of the valve head Provided with a valve needle for opening and closing control of a second valve port on the valve head, the valve needle being provided with an upward communication from the bottom of the valve needle to the valve chamber The through hole above the valve head.
- valve head is axially opened with a valve hole, the valve hole penetrates the valve head, and communicates with the second valve port, and the valve head is radially opened above the second valve port
- flow passage holes that communicate with the valve hole and the valve chamber, respectively.
- valve head is provided with a step on a hole wall of the valve hole, and the valve needle is provided with a flange, and the flange is disposed opposite to the step.
- the runner hole includes an axial hole disposed under the flange, and a radial hole disposed above the flange, the axial hole being in communication with the radial hole.
- valve needle is sleeved with a second sealing ring on a portion below the flange, and the second sealing ring is used for sealing engagement with the inner wall of the valve hole of the valve head.
- valve head is provided with a sealing portion
- valve body is provided with a sealing fitting portion at a position of the first valve port
- valve needle can drive the sealing portion on the valve head to abut a sealing engagement portion on the valve body to seal the first valve port on the valve body.
- the sealing portion is a gasket
- the sealing gasket is fixed on a side end surface of the valve head facing the first valve port on the valve body
- the sealing fitting portion is a convex column, the protruding column Provided around the first valve port, and the gasket is sealingly engageable with the stud.
- gasket is a polytetrafluoroethylene gasket.
- the gasket is embedded on a side end surface of the valve head facing the first valve port on the valve body, and is fixed by a limiting piece.
- the electronic expansion valve further includes a spindle screw, the spindle screw portion extends into the valve head, and the spindle screw can push the valve needle downward along the valve head The axial direction moves downward, and the upward movement of the valve head in a direction away from the first valve port.
- the mandrel screw is fixed with a contact portion on a side end surface facing the valve needle, and the valve needle is provided with a contact fitting portion, and the contact portion can be driven when the mandrel screw moves downward Contacting the contact mating portion, and the mandrel screw is capable of pushing the valve needle to move toward the second valve port on the valve head with the contact portion.
- the contact portion is a steel ball
- the steel ball is fixed on the mandrel screw
- the contact fitting portion is an arc groove, and the arc groove cooperates with the steel ball.
- a valve sleeve is disposed on the valve head, a through hole is defined in the pressure sleeve, and a through hole of the mandrel screw penetrating through the pressure sleeve extends into the valve head, wherein the The outer diameter of the end of the mandrel screw projecting into the inner side of the valve head is larger than the diameter of the through hole of the pressure sleeve.
- valve body is provided with a guiding sleeve, and the valve head portion extends upward into the guiding sleeve and is slidably connected with the guiding sleeve.
- a portion of the valve head that protrudes into the guide sleeve is adjusted with a first sealing ring, and the first sealing ring is used for sealing engagement with the guiding sleeve.
- valve head is provided with a muffling block, and the muffling block is disposed on a passage connecting the second valve port and the first valve port.
- the first valve port on the valve body has a diameter of 10 mm or more.
- the electronic expansion valve provided by the present application is configured by the through hole of the valve needle, so that the electronic expansion valve can be used for large flow control when the first valve port on the valve body is used for the flow control.
- the hole is pressure-relieved to balance the pressure difference of the valve body chamber, and the electronic expansion valve driving torque is ensured, and the valve body structure can be miniaturized.
- FIG. 1 is a schematic structural view of an electronic expansion valve according to a first embodiment of the present application.
- FIG. 2 is a schematic view showing the assembly of the valve head, the valve needle and the mandrel screw of the electronic expansion valve of FIG.
- FIG. 3 is another perspective view of the valve head of the electronic expansion valve of FIG. 1.
- FIG. 4 is another perspective view of the valve needle of the electronic expansion valve of FIG. 1.
- FIG. 5 is a schematic structural view of a mandrel screw of the electronic expansion valve of FIG. 1.
- FIG. 5 is a schematic structural view of a mandrel screw of the electronic expansion valve of FIG. 1.
- FIG. 6 is a schematic structural view of an electronic expansion valve according to a second embodiment of the present application.
- valve body In the first embodiment, 10, the valve body; 11, the first valve port; 12, the connection port; 13, the first connection pipe; 14, the second connection pipe; 15, the sealing engagement portion; 16, the bottom wall; Head; 21, second valve port; 22, runner hole; 23, sealing portion; 24, limiting piece; 25, step; 26, pressure sleeve; 30, valve needle; 31, flange; 32, contact fitting 40, mandrel screw; 41, contact portion; 50, guide sleeve; 100, valve cavity; 101, pretension spring; 102, first seal ring; 103, second seal ring; 200, valve hole; Hole; 300, through hole; 301, axial hole; 302, radial hole.
- valve body 1, valve body, 2, valve head; 3, valve needle; 4, mandrel screw; 5, guide sleeve; 6, first valve port; 7, second valve port; component.
- an electronic expansion valve includes a valve body 10, a valve head 20, a valve needle 30, a spindle screw 40 and a guide sleeve 50, wherein the valve body 10 is A first valve port 11 is disposed, and the valve head 20 is provided with a second valve port 21 communicating with the first valve port 11 , and the valve head 20 can cooperate with the valve body 10 to realize the valve
- the opening and closing control of the first valve port 11 on the body 10 enables the valve needle 30 to open and close the second valve port 21 on the valve head 20.
- the valve body 10 is formed with a valve chamber 100 inwardly.
- the valve body 10 is further provided with a connection port 12, and the first valve port 11 and the connection port 12 are respectively in communication with the valve cavity 100.
- the first valve port 11 is disposed on the bottom wall 16 of the valve body 10, and the first nozzle 13 is connected to the first valve port 11 , and the connection port 12 is disposed.
- a second connecting tube 14 is connected to the side wall of the valve body 10 at the position of the connecting port 12, and the first connecting tube 13 and the second connecting tube 14 are connected to the external pipeline to This achieves communication between the electronic expansion valve and the external piping.
- the valve head 20 is disposed in the valve cavity 100 of the valve body 10, and is movable relative to the valve body 10 along the axial direction of the valve body 10, thereby realizing the valve head 20 and the valve body.
- the cooperation between the 10 and the first valve port 11 on the valve body 10 is controlled to be opened and closed.
- the valve head 20 defines a valve hole 200 axially.
- the valve hole 200 extends through the valve head 20 , and the second valve port 21 communicates with the valve hole 200 .
- the head 20 is provided with a flow passage hole 22 in the radial direction of the valve head 20 above the second valve port 21, and the flow passage hole 22 communicates with the valve hole 200 and the valve chamber 100.
- the valve head 20 is provided with a sealing portion 23, and the valve body 10 is provided with a sealing fitting portion 15, wherein the sealing fitting portion 15 is disposed on the first valve port of the valve body 10.
- the periphery of the valve 11 and the sealing portion 23 on the valve head 20 can abut against the sealing engagement portion 15 on the valve body 10 to seal the first valve port 11 on the valve body 10 It ensures the stability of the first valve port seal on the valve body when the valve head and the valve body cooperate with each other. That is, the opening and closing of the first valve port 11 of the valve body 10 on the electronic expansion valve of the present embodiment is controlled by the seal portion 23 on the valve head 20 and the seal fitting portion 15 on the valve body 10.
- the sealing portion 23 is a gasket fixed on a side end surface of the valve head 20 facing the first valve port 11 of the valve body 10, and the sealing fitting portion 15 is a convex column.
- the protrusion is disposed around the first valve port 11, and the valve head 20 can drive the gasket to move downwardly and sealingly cooperate with the boss to achieve the first on the valve body 10.
- the sealing pad is embedded on one end surface of the valve head 20 facing the first valve port 11 of the valve body 10, and is fixed and fixed by the limiting piece 24, in the embodiment, the The limiting piece 24 and the valve head 20 are specifically fixed by welding, and the limiting piece 24 is flush with a side surface of the valve head 20 facing the first valve opening 11 of the valve body 10. Settings.
- the stud is disposed on the bottom wall 16 of the valve body 10 and partially protrudes upward relative to the bottom wall 16 to facilitate mating with the gasket on the valve head 20 and achieve the first
- the sealing of the valve port 11; in this embodiment, the bottom wall and the valve body 10 are preferably arranged in a split structure, and then fixed by press fitting and welding to facilitate the production of the valve body 10 as a whole.
- the sealing portion 23 and the sealing fitting portion 15 are not limited to the gaskets and the studs shown in the drawings, and those skilled in the art can set the sealing portion 23 as a gasket according to requirements, wherein the sealing pads are opposite.
- the seal fitting portion 15 is the bottom wall 16 of the valve body 10.
- the sealing portion 23 is provided as a stud, and the sealing fitting portion 15 is provided as a gasket mated with the stud.
- the gasket material has a certain flexibility and elasticity, and when the gasket interacts with the pillar, the gasket may undergo a certain deformation under the extrusion of the pillar, thereby improving the When the stud is engaged with the gasket, the sealing between the intersecting faces ensures the sealing of the first valve port 11.
- the gasket is a PTFE seal, that is, the gasket of the present embodiment is made of polytetrafluoroethylene.
- the material of the gasket claimed in the present application is not limited to poly four. Fluoroethylene, other materials with flexibility and elasticity can also be used.
- the valve needle 30 is disposed in the valve head 20 and is movable in the axial direction of the valve head 20 to perform opening and closing control of the second valve port 21 on the valve head 20.
- the valve needle 30 is provided with a through hole 300 communicating upward from the bottom of the valve needle 30 to a portion of the valve chamber 100 above the valve head 20, so that when the valve body 10 of the electronic expansion valve is When a valve port 11 is opened to achieve a large flow rate communication, the electronic expansion valve of the present embodiment can be depressurized by the through hole 300 on the valve needle 30 to balance the pressure difference of the inner chamber 100 of the valve body 10, And balancing the pressure difference between the first valve port 11 and the connecting port 12 on the valve body 10, thereby achieving balance of pressure difference between the inlet and outlet sides of the valve body, ensuring the driving torque of the electronic expansion valve, and realizing the valve body The miniaturization of the structure.
- the through hole 300 of the valve needle 30 includes an axial hole 301 disposed under the flange 31, and a radial hole 302 disposed above the flange 31, the axial hole 301 It is in communication with the radial hole 302.
- a step 25 is disposed on the wall of the valve hole 200 of the valve head 20.
- the step 25 is disposed above the flow hole 22, and the valve needle 30 is provided with a flange 31.
- a step 25 of the valve head 20 is disposed opposite the flange 31 of the valve needle 30, and a pretension spring 101 is disposed between the step 25 and the flange 31 to use the preload spring 101 is provided to move the valve needle 30 in a direction away from the second valve port 21.
- the mandrel screw 40 partially extends into the valve head 20, and the mandrel screw 40 can push down the valve needle 30 downwardly in the axial direction of the valve head 20, upward
- the valve head 20 can be moved in a direction away from the first valve port 11.
- the mandrel screw 40 and the valve needle 30 are separately provided. Referring to FIG. 5 together, the mandrel screw 40 is fixedly contacted on one end surface facing the valve needle 30.
- the end portion of the valve needle 30 is provided with a contact fitting portion 32 for matching the contact portion 41, and the mandrel screw 40 moves downward to bring the contact portion 41 into contact with the valve needle 30.
- the valve needle 30 can be pushed in the direction of the second valve opening 21 of the valve head 20 by the contact portion 41. That is, when the mandrel screw 40 pushes down the valve needle 30, the contact portion 41 fixed to the mandrel screw 40 first contacts the contact portion 32 of the valve needle 30.
- the downward driving of the valve needle 30 by the spindle screw 40 is achieved by the contact portion 41 being pushed down by the contact portion 32.
- the electronic expansion valve of the present embodiment uses the spindle screw 40 to move the valve needle 30 downward, and the contact portion 41 fixed to the spindle screw 40 first contacts and cooperates with the contact fitting portion 32 on the valve needle 30, and is reused.
- the contact portion 41 drives the valve needle 30 downward through the contact fitting portion 32, thereby ensuring the coaxiality between the mandrel screw 40 and the valve needle 30, thereby reducing the valve needle. The effect of the probability of a jam occurring when moving within the valve head 20.
- the contact portion 41 is provided as a steel ball, and accordingly, the contact fitting portion 32 on the valve needle 30 is provided as an arcuate groove, and the steel ball is engaged with the arcuate groove. It can be understood that when the steel ball is in contact with the arcuate groove, the contact area between the steel balls is large, and the stability when the two are in contact with each other is improved.
- the contact portion 41 and the contact mating portion 32 are not limited to the steel ball and the arc groove shown in the drawing, and those skilled in the art can set the contact portion 41 to be in contact with the contact mating portion 32 according to requirements.
- the end face may be an arc-shaped structure, or the contact portion 41 may be configured as another shape; in addition, the steel ball is interchanged with the arc groove, that is, the mandrel screw 40 faces the valve needle An end surface of one side of the 30 is provided with an arcuate groove, and the valve needle 30 is correspondingly provided with a steel ball.
- the steel ball is fixed to the central axis of the mandrel screw 40 by welding, preferably in a spot welding manner; and the arcuate groove is opened on the central axis of the valve needle 30.
- the valve head 20 is provided with a pressure sleeve 26, the pressure sleeve 26 is provided with a through hole 261, and the mandrel screw 40 extends through the through hole 261 of the pressure sleeve 26.
- an outer diameter of an end portion of the mandrel screw 40 extending into the inner side of the valve head 20 is larger than an outer diameter of the through hole 261 of the pressure sleeve 26.
- the force is applied to push the valve head 20 toward the first valve port 11 of the valve body 10 until the sealing portion 23 on the valve head 20 abuts the sealing engagement portion 15 on the valve body 10 Cooperating, and thereby closing the first valve port 11 of the valve body 10 on the valve body 10; afterwards, the valve needle 30 continues to compress the preload spring 101 until the valve needle 30 is inserted into the seat
- the second valve port 21 on the valve head 20 is described and the closing of the second valve port 21 on the valve head 20 is effected. That is, in the operation of the electronic expansion valve of the present embodiment, the first valve port 11 on the valve body 10 is first sealed, and then the second valve port 21 on the valve head 20 is sealed.
- valve needle 30 When the mandrel screw 40 moves upward, after the mandrel screw 40 is disengaged from the valve needle 30, the valve needle 30 is driven upward by the elastic return of the pretension spring 101, and then the valve needle is pushed up first. 30 is disengaged from the second valve port 21 on the valve head 20, and the opening of the second valve port 21 is achieved, and as the mandrel screw 40 continues to move upward, the mandrel screw 40 can pass through The pressure sleeve 26 drives the valve head 20 to move away from the first valve port 11 on the valve body 10, and opens the first valve port 11 on the valve body 10.
- the guide sleeve 50 is disposed above the valve body of the valve body 10 and is fixedly connected to the valve body 10.
- the valve head 20 extends upwardly into the guide sleeve 50 and is slidably coupled to the guide sleeve 50 for guiding the movement of the valve head 20 in the valve body of the valve body 10, This ensures the coaxiality between the valve head 20, the mandrel screw 40 and the valve needle 30.
- the first sealing ring 102 is sleeved with the first sealing ring 102 , and the first sealing ring 102 is used for sealingly engaging with the guiding sleeve 50 .
- the sealing of the valve body 100 on the valve body 10 is ensured; the valve needle 30 is sleeved with a second sealing ring 102 on a portion disposed below the flange 31, and the second sealing ring 102 is used for
- the inner wall of the valve bore 200 of the valve head 20 is sealingly fitted to ensure the sealing of the valve needle 30 to the second valve port 21 of the valve head 20.
- the size of the valve head 20, the valve needle 30, and the caliber of the first valve port 11 and the second valve port 21 are specifically designed according to the flow demand of the electronic expansion valve.
- the diameter of the first valve port 11 is set to 10 mm or more.
- the diameter of the first valve port 11 is less than 10 mm or even less, the pressure difference between the upper and lower sides of the valve needle 30 is not obvious enough.
- the first valve port may be omitted without providing the through hole 300.
- the caliber of 11 is set to be 10 mm or more, and the advantage of the present embodiment can be exerted, and the differential pressure force is eliminated on the basis of ensuring the CV value requirement of the valve head 20 on the opening of the first valve port 11 on the valve body 10. The effect on the performance of the electronic expansion valve.
- an electronic expansion valve includes a valve body 1 , a valve head 2 , a valve needle 3 , a spindle screw 4 , and a guide sleeve 5 , wherein the valve body 1 is provided with a first a valve port 6 , the valve head 2 is provided with a second valve port 7 communicating with the first valve port 6 , the valve head 2 can be engaged with the valve body 1 to achieve the valve body 1
- the opening and closing control of the first valve port 6 is capable of opening and closing control of the second valve port 7 on the valve head 2.
- the electronic expansion valve provided by the second embodiment of the present application has substantially the same structure and working principle, and the main difference is that the valve head 2 on the electronic expansion valve And the valve needle 3 partially extends into the guide sleeve 5 and is slidably connected with respect to the guide sleeve 5; the driving component 8 for driving the valve needle 3 on the electronic expansion valve comprises: a coil portion and a sleeve
- valve needle 3 in the present embodiment drives the said The mandrel screw 4 on which the valve needle 3 moves is fixedly connected; and the seal between the valve head 2 and the valve body 1 on the electronic expansion valve is a hard fit, and the first of the valve body 1 is engaged by the valve head 2
- the valve port 6 is used to seal the first valve port 6 on the valve body 1.
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- Electrically Driven Valve-Operating Means (AREA)
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Abstract
一种电子膨胀阀，包括阀体(10)，设于阀体内的阀头(20)，阀体具有阀腔(100)及与阀腔连通的第一阀口(11)，阀头设置在阀腔内，用于对阀体上的第一阀口进行启闭控制，阀头具有与第一阀口连通的第二阀口(21)，阀头的第二阀口内设置有阀针(30)，阀针用于对阀头上的第二阀口进行启闭控制，阀针上设置有从阀针底部向上连通至阀腔位于阀头以上部分的通流孔(300)。该电子膨胀阀用阀体上第一阀口进行大流量控制时，可用通流孔进行泄压，以平衡阀体内腔室的压差平衡，保证该电子膨胀阀驱动力矩的同时，能够实现阀体结构的小型化。
Description
相关申请
本申请要求2018年02月11日申请的，申请号为201820244945.1，名称为“一种二段式电子膨胀阀”、及2018年12月07日申请的，申请号为201822057842.7，名称为“电子膨胀阀”的中国专利申请的优先权，在此将其全文引入作为参考。
本申请涉及电子阀相关的技术领域，尤其涉及一种电子膨胀阀。
电子膨胀阀作为一种调节流量的元件，适应了制冷机电一体化的发展要求，为制冷系统的智能化提供了条件，是一种很有发展前途的自控调节元件。电子膨胀阀是利用步进电机的原理，通过线圈驱动磁转子部件正反向转动，并将磁转子部件的旋转运行转化为推杆的上下移动，推杆带动与之连接的阀针上升或下降控制制冷剂的流量。
其中，常用的电子膨胀阀通常具有两个用作液体流通的阀口，分别与设置在阀体上的第一阀口，及设置在阀头上的第二阀口，其中阀体上的第一阀口由阀头来控制启闭，而阀头上的第二阀口则有设于阀头内的阀针来控制启闭，实现两段流量调节。可以理解，阀针通过对第二阀口的启闭控制，实现该电子膨胀阀精密流量的控制，而阀头通过对第二阀口的启闭控制，保证该电子膨胀阀全开状态下大流量、大开度。
目前的电子膨胀阀在工作时，当阀体上的第一阀口打开，实现大流量连通时，阀体上的进、出口侧会形成压差，而所述阀头上第二阀口的口径一般在2.0mm以内，所述阀体上第一阀口的口径一般在8.0mm以上，这样很难保证该 电子膨胀阀全开时的CV值要求。
发明内容
有鉴于此，有必要提供一种电子膨胀阀。
本申请一种电子膨胀阀，包括阀体，设于所述阀体内的阀头，所述阀体具有阀腔及与所述阀腔连通的第一阀口，所述阀头设置在所述阀腔内，用于对所述阀体上的第一阀口进行启闭控制，所述阀头具有与所述第一阀口连通的第二阀口，所述阀头的第二阀口内设置有阀针，所述阀针用于对所述阀头上的第二阀口进行启闭控制，所述阀针上设置有从所述阀针底部向上连通至所述阀腔位于所述阀头以上部分的通流孔。
进一步地，所述阀头轴向开设有阀孔，所述阀孔贯穿所述阀头，并与所述第二阀口连通，所述阀头在所述第二阀口的上方径向开设有流道孔，所述流道孔分别与所述阀孔、所述阀腔连通。
进一步地，所述阀头在所述阀孔的孔壁上设置有台阶，所述阀针上设置有凸缘，所述凸缘与所述台阶相对设置。
进一步地，所述流道孔包括设于所述凸缘下方的轴向孔，及设于所述凸缘上方的径向孔，所述轴向孔与所述径向孔连通。
进一步地，所述阀针在凸缘下方的部分上套接有第二密封圈，所述第二密封圈用于与所述阀头的阀孔内壁密封配合。
进一步地，所述阀头上设置有密封部，所述阀体在所述第一阀口的位置设置有密封配合部，所述阀针能够带动所述阀头上的密封部抵接于所述阀体上的密封配合部，以对所述阀体上的第一阀口进行密封。
进一步地，所述密封部为密封垫，所述密封垫固定在所述阀头面向所述阀体上第一阀口的一侧端面上，所述密封配合部为凸柱，所述凸柱围绕所述第一阀口设置，且所述密封垫能够与所述凸柱密封配合。
进一步地，所述密封垫为聚四氟乙烯密封垫。
进一步地，所述密封垫嵌装在所述阀头面向所述阀体上第一阀口的一侧 端面上，并用限位片进行限位固定。
进一步地，所述电子膨胀阀还包括芯轴螺杆，所述芯轴螺杆部分伸入至所述阀头内，且所述芯轴螺杆向下能够推顶所述阀针沿所述阀头的轴向方向进行向下移动，向上能够带动所述阀头朝远离所述第一阀口的方向进行移动。
进一步地，所述芯轴螺杆在面向所述阀针的一侧端面上固定有接触部，所述阀针上设置有接触配合部，所述芯轴螺杆向下移动时能够带动所述接触部与所述接触配合部接触配合，且所述芯轴螺杆能够用所述接触部推顶所述阀针朝所述阀头上第二阀口的方向移动。
进一步地：所述接触部为钢球，所述钢球固定在所述芯轴螺杆上，所述接触配合部为弧形槽，所述弧形槽与所述钢球相配合。
进一步地，所述阀头上设置有一压套，所述压套上开设有一通孔，且所述芯轴螺杆贯穿所述压套上的通孔伸入至所述阀头内，其中所述芯轴螺杆伸入至所述阀头内一侧的端部外径大于所述压套上通孔的孔径。
进一步地，所述阀体上设置有导向套，所述阀头部分向上伸入至所述导向套内，并与所述导向套滑动连接。
进一步地，所述阀头上伸入至所述导向套的部分上调节有第一密封圈，所述第一密封圈用于与所述导向套密封配合。
进一步地，所述阀头上设置有消音块，所述消音块设置在所述第二阀口与所述第一阀口相连通的通路上。
进一步地，所述阀体上第一阀口的口径在10mm以上。
本申请提供的所述电子膨胀阀，通过所述阀针上通流孔的结构设置，使得所述电子膨胀阀用所述阀体上第一阀口进行大流量控制时，可用所述通流孔进行泄压，以平衡所述阀体内腔室的压差平衡，保证该电子膨胀阀驱动力矩的同时，能够实现阀体结构的小型化。
图1为本申请第一实施方式所提供的电子膨胀阀的结构示意图。
图2为图1中电子膨胀阀的阀头、阀针及芯轴螺杆的装配示意图。
图3为图1中电子膨胀阀的阀头的另一角度视图。
图4为图1中电子膨胀阀的阀针的另一角度视图。
图5为图1中电子膨胀阀的芯轴螺杆的结构示意图。
图6为本申请第二实施方式所提供的电子膨胀阀的结构示意图。
在第一实施方式中，10、阀体；11、第一阀口；12、连接口；13、第一接管；14、第二接管；15、密封配合部；16、底壁；20、阀头；21、第二阀口；22、流道孔；23、密封部；24、限位片；25、台阶；26、压套；30、阀针；31、凸缘；32、接触配合部；40、芯轴螺杆；41、接触部；50、导向套；100、阀腔；101、预紧弹簧；102、第一密封圈；103、第二密封圈；200、阀孔；261、通孔；300、通流孔；301、轴向孔；302、径向孔。
在第二实施方式中，1、阀体、2、阀头；3、阀针；4、芯轴螺杆；5、导向套；6、第一阀口；7、第二阀口；8、驱动部件。
下面将对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施方式，都属于本申请保护的范围。
请参阅图1、图2，本申请第一实施方式所提供的电子膨胀阀，包括阀体10、阀头20、阀针30、芯轴螺杆40和导向套50，其中所述阀体10上设置有第一阀口11，所述阀头20上设置有与所述第一阀口11连通的第二阀口21，所述阀头20能够与所述阀体10配合，实现对所阀体10上的第一阀口11的启闭控制，所述阀针30能够对所述阀头20上的第二阀口21进行启闭控制。
所述阀体10向内形成有阀腔100，所述阀体10上还设置有连接口12，所述第一阀口11、所述连接口12分别与所述阀腔100连通。
在本实施方式中，所述第一阀口11设置在所述阀体10的底壁16上，并在所述第一阀口11位置连接有第一接管13，而所述连接口12设置在所述阀体10的侧壁上，并在所述连接口12位置连接有第二接管14，且所述第一接管13和所述第二接管14用于与外置管路连接，以此实现该电子膨胀阀与外置管路的连通。
所述阀头20设置在所述阀体10的阀腔100内，且能够沿所述阀体10的轴向方向做相对于所述阀体10的移动，以此实现阀头20与阀体10之间的配合，并对所述阀体10上的第一阀口11进行启闭控制。
请一并参阅图3，所述阀头20轴向开设有一阀孔200，所述阀孔200贯穿所述阀头20，所述第二阀口21与所述阀孔200连通，所述阀头20在所述第二阀口21的上方沿所述阀头20的径向方向开设有流道孔22，所述流道孔22与所述阀孔200、所述阀腔100连通。
在本实施方式中，所述阀头20上设置有密封部23，所述阀体10上设置有密封配合部15，其中所述密封配合部15设置在所述阀体10上第一阀口11的外围，且所述阀头20上的密封部23能够与所述阀体10上的密封配合部15抵接配合，以对所述阀体10上第一阀口11进行密封，以此确保了阀头与阀体相互配合时，对阀体上第一阀口密封的稳定性。也就是说，本实施方式的电子膨胀阀上阀体10第一阀口11的启闭由所述阀头20上的密封部23与所述阀体10上的密封配合部15来控制实现。
具体地，所述密封部23为密封垫，所述密封垫固定在所述阀头20面向所述阀体10上第一阀口11的一侧端面上，所述密封配合部15为凸柱，所述凸柱包围所述第一阀口11设置，所述阀头20能够带动所述密封垫向下运动，并与所述凸柱密封配合，以此实现对所述阀体10上第一阀口11的密封。其中，所述密封垫嵌装在所述阀头20面向所述阀体10上第一阀口11的一侧端面上，并用限位片24进行限位固定，在本实施方式中，所述限位片24与所述阀头20具体可通过焊接的方式进行固定，且所述限位片24与所述阀头20面向所述阀体10上第一阀口11的一侧端面齐平设置。
其中，所述凸柱设置在所述阀体10的底壁16上，并相对于所述底壁16 部分向上凸起，以便于与所述阀头20上的密封垫配合并实现对第一阀口11的密封；本实施方式优选将底壁与阀体10设置为分体式结构，然后通过压装、焊接的方式进行固定，以便于该阀体10整体的生产制备。可以理解，所述密封部23与所述密封配合部15不局限于图示所示的密封垫与凸柱，本领域技术人员可以依据需求，将密封部23设置为密封垫，其中密封垫相对于所述阀头20上面向所述阀体10上第一阀口11一侧的端面部分向外凸出，且所述密封垫能够包围所述阀体10上第一阀口11设置；相应地，所述密封配合部15则为所述阀体10上的底壁16。或者将所述密封部23设置为凸柱，所述密封配合部15设置为与所述凸柱配合的密封垫。
进一步地，所述密封垫材质具有一定的柔性和弹性，所述密封垫与凸柱相互作用时，所述密封垫在所述凸柱的挤压之下会发生一定的形变，以此提高所述凸柱与所述密封垫配合时，两者相交面之间的密封性，进而确保了对第一阀口11的密封。在本实施方式中，所述密封垫为聚四氟乙烯密封，也就是说，本实施方式的密封垫材质为聚四氟乙烯，当然了本申请请求保护的密封垫的材质不局限于聚四氟乙烯，也可选用其它具有柔性和弹性的材质。
所述阀针30设置在所述阀头20内，且能够沿所述阀头20的轴向方向移动，以对所述阀头20上的第二阀口21进行启闭控制。
所述阀针30上设置有从所述阀针30底部向上连通至所述阀腔100位于所述阀头20以上部分的通流孔300，使得当所述电子膨胀阀上阀体10的第一阀口11开启，实现大流量连通时，本实施方式的电子膨胀阀可用所述阀针30上的通流孔300进行泄压，以平衡所述阀体10内腔室100的压差，以及平衡所述阀体10上第一阀口11与连接口12之间的压差，实现所述阀体上进、出口侧压差平衡，保证该电子膨胀阀驱动力矩的同时，能够实现阀体结构的小型化。
具体地，所述阀针30上的通流孔300包括设于所述凸缘31下方的轴向孔301，及设于所述凸缘31上方的径向孔302，所述轴向孔301与所述径向孔302连通。
请一并参阅图4，所述阀头20上阀孔200的孔壁上设置有一台阶25，所述台阶25设置在所述流动孔22的上方，所述阀针30上设置有凸缘31，所述阀 头20上台阶25与所述阀针30上凸缘31相对设置，并在所述台阶25与所述凸缘31之间设置有预紧弹簧101，以用所述预紧弹簧101来提供所述阀针30朝远离所述第二阀口21的方向移动。
所述芯轴螺杆40部分伸入至所述阀头20内，且所述芯轴螺杆40向下能够推顶所述阀针30沿所述阀头20的轴向方向进行向下移动，向上能够带动所述阀头20朝远离所述第一阀口11的方向进行移动。
在本实施方式中，所述芯轴螺杆40与所述阀针30分体设置，请一并参阅图5，所述芯轴螺杆40在面向所述阀针30的一侧端面上固定有接触部41，所述阀针30的端面上开设有用于匹配所述接触部41的接触配合部32，所述芯轴螺杆40向下移动带动所述接触部41插入至所述阀针30的接触配合部32内，且能够用所述接触部41推顶所述阀针30朝所述阀头20上第二阀口21的方向移动。也就是说，所述芯轴螺杆40在向下推顶所述阀针30时，固定在所述芯轴螺杆40上的接触部41先与所述阀针30上开设有的接触配合部32配合，然后再用接触部41通过对接触配合部32的向下推顶，以此实现所述芯轴螺杆40对所述阀针30的向下驱动。
可以理解，本实施方式的电子膨胀阀用芯轴螺杆40向下驱动阀针30移动，通过固定在芯轴螺杆40上接触部41先与阀针30上的接触配合部32接触配合，再用接触部41通过所述接触配合部32对阀针30进行向下驱动，以此确保所述芯轴螺杆40与所述阀针30两者之间的同轴度，进而起到了降低该阀针30在阀头20内移动时发生卡死的概率的作用。这是因为现有技术中芯轴螺杆与阀针具体通过压装和焊接的方式连接为一体，而焊接过程中的温度较高，容易造成芯轴螺杆变形，从而使得芯轴螺杆40与阀针30之间的同轴度不良。
具体地，所述接触部41设置为钢球，相应地，所述阀针30上的接触配合部32设置为弧形槽，且所述钢球与所述弧形槽相配合。可以理解，所述钢球与所述弧形槽接触配合时，两者的接触面积大，具有提高两者接触后进行相互作用时的稳定性。当然了，所述接触部41与所述接触配合部32不局限于图示所示的钢球与弧形槽，本领域技术人员可以依据需求将接触部41设置为与接触配合部32接触配合时的端面为弧状结构即可，或者将接触部41设置为其它形 状的结构；另外，所述钢球与所述弧形槽互换，亦即所述芯轴螺杆40在面向所述阀针30的一侧端面设置有弧形槽，所述阀针30上对应设置有钢球。
其中，所述钢球以焊接的方式固定在所述芯轴螺杆40的中轴线上，优选为点焊的方式；且所述弧形槽开设在所述阀针30的中轴线上。
在本实施方式中，所述阀头20上设置有压套26，所述压套26上开设有通孔261，且所述芯轴螺杆40贯穿所述压套26上的通孔261伸入至所述阀头20内，其中所述芯轴螺杆40伸入至所述阀头20内一侧的端部外径大于所述压套26上通孔261的孔径。使得所述芯轴螺杆40向上移动时，所述芯轴螺杆40上外径较大的端部能够卡在所述阀头20上的压套26，使得所述芯轴螺杆40再向上移动时，能够带动所述阀头20朝远离所述第一阀口11的方向进行移动。
由上可知，当所述芯轴螺杆40向下移动，并通过固定在所述芯轴螺杆40上的钢球41推顶所述阀针30沿所述阀头20的轴向方向朝所述阀头20上第二阀口21移动时，所述阀针30上的凸缘31压缩预紧弹簧101，在此过程中，所述阀头20上的台阶25受预紧弹簧101向下的作用力，推顶所述阀头20朝所述阀体10上第一阀口11的方向移动，直至所述阀头20上的密封部23与所述阀体10上的密封配合部15抵接配合，并由此实现所述阀头20对所述阀体10上第一阀口11的闭合；之后，所述阀针30继续压缩预紧弹簧101，直至所述阀针30插入至所述阀头20上的第二阀口21，并实现对所述阀头20上第二阀口21的闭合。也就是说，本实施方式的电子膨胀阀在工作时，先对所述阀体10上的第一阀口11进行密封，然后再实现对所述阀头20上第二阀口21的密封。而当所述芯轴螺杆40向上移动时，所述芯轴螺杆40脱离所述阀针30后，所述阀针30在预紧弹簧101弹性复位的驱动下，先向上推顶所述阀针30脱离所述阀头20上的第二阀口21，并实现对所述第二阀口21的开启，随着所述芯轴螺杆40继续往上移动，所述芯轴螺杆40能够通过所述压套26带动所述阀头20朝远离所述阀体10上第一阀口11的方向移动，并实现对所述阀体10上第一阀口11的开启。
所述导向套50设置在所述阀体10阀腔的上方，并与所述阀体10固定连接。其中所述阀头20部分向上伸入至所述导向套50内，并与所述导向套50滑 动连接，用于对所述阀头20在所述阀体10阀腔内的移动进行导向，以此确保了所述阀头20、所述芯轴螺杆40与所述阀针30三者之间的同轴度。
在本实施方式中，所述阀头20伸入至所述导向套50的部分上套接第一密封圈102，所述第一密封圈102用于与所述导向套50密封配合，以此确保所述阀体10上阀腔100的密封性；所述阀针30在设于所述凸缘31下方的部分上套接有第二密封圈102，所述第二密封圈102用于与所述阀头20的阀孔200内壁密封配合，以此确保所述阀针30对所述阀头20上第二阀口21的密封性。
本领域技术人员可以理解，所述阀头20、所述阀针30的尺寸以及所述第一阀口11和所述第二阀口21的口径按照该电子膨胀阀的流量需求进行具体设计。在本实施方式中，所述第一阀口11的口径设置为10mm以上。当所述第一阀口11的口径小于10mm甚至更小时，所述阀针30上下压差不够明显，从简化结构的角度考虑，可以不设置通流孔300，而将所述第一阀口11的口径设置为10mm以上，可以发挥本实施方式的优势，在保证所述阀头20对所述阀体10上第一阀口11打开后的CV值要求的基础上，消除了压差力对所述电子膨胀阀性能的影响。
请参阅图6，本申请第二实施方式所提供的电子膨胀阀，包括阀体1、阀头2、阀针3、芯轴螺杆4和导向套5，其中所述阀体1上设置有第一阀口6，所述阀头2上设置有与所述第一阀口6连通的第二阀口7，所述阀头2能够与所述阀体1配合，实现对所阀体1上的第一阀口6的启闭控制，所述阀针3能够对所述阀头2上的第二阀口7进行启闭控制。
相较于本申请第一实施方式所提供的电子膨胀阀，本申请第二实施方式所提供的电子膨胀阀，其结构与工作原理大致相同，主要区别在于：该电子膨胀阀上的阀头2和阀针3均部分伸入至所述导向套5内，并相对于所述导向套5滑动连接；该电子膨胀阀上用于驱动所述阀针3的驱动部件8包括：线圈部分、套管、转子、导动片、螺母、限位弹簧等，具体结构和原理与现有技术中电子膨胀阀驱动部件结构和原理相同，也就是说，本实施方式中的阀针3与带动所述阀针3移动的芯轴螺杆4固定连接；且该电子膨胀阀上阀头2与阀体1之间的密封为硬配合，通过用所述阀头2卡入所述阀体1的第一阀口6，来实现对所 述阀体1上第一阀口6的密封。
本领域的技术人员容易理解的是，在不冲突的前提下，上述各优选方案可以自由地组合、叠加。
应当理解，上述的实施方式仅是示例性的，而非限制性的，在不偏离本申请的基本原理的情况下，本领域的技术人员可以针对上述细节做出的各种明显的或等同的修改或替换，都将包含于本申请的权利要求范围内。
Claims (17)
- 一种电子膨胀阀，包括阀体，设于所述阀体内的阀头，所述阀体具有阀腔及与所述阀腔连通的第一阀口，所述阀头设置在所述阀腔内，用于对所述阀体上的第一阀口进行启闭控制，所述阀头具有与所述第一阀口连通的第二阀口，所述阀头的第二阀口内设置有阀针，所述阀针用于对所述阀头上的第二阀口进行启闭控制，其特征在于，所述阀针上设置有从所述阀针底部向上连通至所述阀腔位于所述阀头以上部分的通流孔。
- 如权利要求1所述的电子膨胀阀，其特征在于，所述阀头轴向开设有阀孔，所述阀孔贯穿所述阀头，并与所述第二阀口连通，所述阀头在所述第二阀口的上方径向开设有流道孔，所述流道孔分别与所述阀孔、所述阀腔连通。
- 如权利要求2所述的电子膨胀阀，其特征在于，所述阀头在所述阀孔的孔壁上设置有台阶，所述阀针上设置有凸缘，所述凸缘与所述台阶相对设置。
- 如权利要求3所述的电子膨胀阀，其特征在于，所述流道孔包括设于所述凸缘下方的轴向孔，及设于所述凸缘上方的径向孔，所述轴向孔与所述径向孔连通。
- 如权利要求3所述的电子膨胀阀，其特征在于，所述阀针在凸缘下方的部分上套接有第二密封圈，所述第二密封圈用于与所述阀头的阀孔内壁密封配合。
- 如权利要求1所述的电子膨胀阀，其特征在于，所述阀头上设置有密封部，所述阀体在所述第一阀口的位置设置有密封配合部，所述阀针能够带动所述阀头上的密封部抵接于所述阀体上的密封配合部，以对所述阀体上的第一阀口进行密封。
- 如权利要求6所述的电子膨胀阀，其特征在于，所述密封部为密封垫，所述密封垫固定在所述阀头面向所述阀体上第一阀口的一侧端面上，所述密封配合部为凸柱，所述凸柱围绕所述第一阀口设置，且所述密封垫能够与所述凸柱密封配合。
- 如权利要求7所述的电子膨胀阀，其特征在于，所述密封垫为聚四氟乙烯密封垫。
- 如权利要求7所述的电子膨胀阀，其特征在于，所述密封垫嵌装在所述阀头面向所述阀体上第一阀口的一侧端面上，并用限位片进行限位固定。
- 如权利要求1所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括芯轴螺杆，所述芯轴螺杆部分伸入至所述阀头内，且所述芯轴螺杆向下能够推顶所述阀针沿所述阀头的轴向方向进行向下移动，向上能够带动所述阀头朝远离所述第一阀口的方向进行移动。
- 如权利要求10所述的电子膨胀阀，其特征在于，所述芯轴螺杆在面向所述阀针的一侧端面上固定有接触部，所述阀针上设置有接触配合部，所述芯轴螺杆向下移动时能够带动所述接触部与所述接触配合部接触配合，且所述芯轴螺杆能够用所述接触部推顶所述阀针朝所述阀头上第二阀口的方向移动。
- 如权利要求11所述的电子膨胀阀，其特征在于：所述接触部为钢球，所述钢球固定在所述芯轴螺杆上，所述接触配合部为弧形槽，所述弧形槽与所述钢球相配合。
- 如权利要求10所述的电子膨胀阀，其特征在于，所述阀头上设置有一压套，所述压套上开设有一通孔，且所述芯轴螺杆贯穿所述压套上的通孔伸入至所述阀头内，其中所述芯轴螺杆伸入至所述阀头内一侧的端部外径大于所述压套上通孔的孔径。
- 如权利要求1所述的电子膨胀阀，其特征在于，所述阀体上设置有导向套，所述阀头部分向上伸入至所述导向套内，并与所述导向套滑动连接。
- 如权利要求14所述的电子膨胀阀，其特征在于，所述阀头上伸入至所述导向套的部分上调节有第一密封圈，所述第一密封圈用于与所述导向套密封配合。
- 如权利要求1所述的电子膨胀阀，其特征在于，所述阀头上设置有消音块，所述消音块设置在所述第二阀口与所述第一阀口相连通的通路上。
- 如权利要求1所述的电子膨胀阀，其特征在于，所述阀体上第一阀口 的口径在10mm以上。
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| JP2021131121A (ja) * | 2020-02-19 | 2021-09-09 | 株式会社鷺宮製作所 | 電動弁及び冷凍サイクルシステム |
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