CN104930241B - Electric expansion valve - Google Patents
Electric expansion valve Download PDFInfo
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- CN104930241B CN104930241B CN201410101289.6A CN201410101289A CN104930241B CN 104930241 B CN104930241 B CN 104930241B CN 201410101289 A CN201410101289 A CN 201410101289A CN 104930241 B CN104930241 B CN 104930241B
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- needle
- conical surface
- valve port
- straight section
- valve
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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
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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
- F16K1/38—Valve members of conical shape
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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
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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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
- F16K27/029—Electromagnetically actuated valves
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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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Electrically Driven Valve-Operating Means (AREA)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of electric expansion valves, valve body and valve port including electromagnetic coil, equipped with valve port coordinate to carry out the needle of flow-rate adjustment to electric expansion valve, it is characterized in that, the first conical surface portion that the needle includes main paragraph, is disposed adjacent with the main paragraph, the valve port includes an isometrical straight section portion, when the electromagnetic coil applies 0 pulse, the straight section portion is not contacted with the needle, and plane where the top in the straight section portion and the intersection of the needle are located in first conical surface portion；Electric expansion valve provided by the invention can accurately adjust flow in low stage pulse, and there is no the sections that flow value is constant in flow curve, and small-pulse effect region can be made full use of to carry out flow-rate adjustment, expand the adjustable range of electric expansion valve.
Description
Technical field
The present invention relates to fluid control component technical field, more particularly to a kind of electric expansion valve.
Background technology
In cooling and warming technical field, electric expansion valve is the cold medium flux control unit of heating-cooling equipment, work
Process is generally：With the energization or power-off of coil device, valve needle adjusts the aperture of valve port, to accurately adjust refrigerant
Flow.
In some systems, fails when electric expansion valve is in full off state or control system breaks down
When, if compressor remains in operation, the local vacuum-pumping of refrigerating circuit can be caused, and then compressor can be damaged and even damaged entirely
Refrigeration system.Therefore, in such systems, gradually there is the electric expansion valve of flow using fully closed and replace common fully closed no stream
Measure electric expansion valve, it is so-called it is fully closed have flow, when referring to that the needle of electric expansion valve is in the state of close port, still have
Certain flow, thus it is possible to prevente effectively from causing to make because compressor remains in operation when electric expansion valve is in full off state
The problem of cooling system circuit vacuum.
In the prior art, fully closed to there are two kinds of structures of flow electric expansion valve generally use grooving type and clearance type to come in fact
It is existing, it illustrates respectively below in conjunction with the accompanying drawings.
Please refer to Fig. 1, Fig. 2, wherein Fig. 1 is that the needle during grooving type electric expansion valve valve opening is tied with valve port cooperation
Structure schematic diagram, Fig. 2 are the flow curves of grooving type electric expansion valve.
So-called grooving type refers to the valve port position grooving in electric expansion valve so that sealing valve port is imperfect, in this way, working as
When electric expansion valve is in full off state, since the presence of grooving is unable to be fully sealed between needle and valve port, still have few
The fluid of amount passes through from grooving position, has flow to realize that electric expansion valve is fully closed.
Needle 18 is provided with sealing cone 181 and adjusts the conical surface 182, wherein sealing cone 181 is used for and valve port 17 contacts
To realize that sealing or part seal（Because Fig. 1 is grooving type, valve port position is provided with grooving to keep certain flow, therefore valve
Needle 18 can not completely be sealed valve port）.The cone angle of sealing cone 181 is usually set greater than 45 by self-locking in order to prevent
Degree.Such as Fig. 1（a）It is shown, in order to obtain and set 0 stream of pulses magnitude, application 0~X1 pulses are usually taken, make needle 18 and valve
Mouth 17 comes into full contact with.Needle is in close port state at this time, and sealing cone 181 is contacted with valve port 17, and contact site is located at
On sealing cone 181, the valve port plane P1 where the contact site is higher than the sealing cone 181 and the adjusting conical surface 182 of needle 18
Between intersection where needle plane P2（Please refer to the portions I enlarged drawing）.In this way, in conjunction with Fig. 2 it is found that 0~X1 pulse areas
Flow be 0 stream of pulses magnitude, the flow value is related with the depth of grooving, during the actual processing of grooving, due to material
The difference of material hardness itself and the difference of process can not ensure that the depth of grooving is completely the same, in this way, 0 pulse flow
Value cannot be entirely controlled；In addition, the width of the pulse areas 0~X1 degree is again related with debugging, the error in debugging process can enable X1
It fluctuates in a certain range, general error can reach 40 pulses, to influence the precision of electronic expansion valve regulation.
Since sealing cone 181 and the taper of the adjusting conical surface 182 are inconsistent, flow change rate can be caused different, in valve opening
In the process, when inflection point is by being X2 pulse positions shown in FIG. 1 before valve port, sealing cone 181 and 17 contact site of valve port place
Valve port plane P1 and sealing cone 181 and the needle plane P2 that adjusts between the conical surface 182 where intersection overlap, such as Fig. 1（b）
It is shown.With moving up further for needle 18, corresponding position such as Fig. 1 of needle and valve port when X3 pulses（c）It is shown, final valve port
It is shown in a fully open operation, such as Fig. 1（d）Shown, inflection point of the flow curve between X3 and X4 can be set according to actual conditions.
By the flow curve of Fig. 1 it is found that X1~X2 sections of pulse flow change rates are significantly greater than required by electric expansion valve
Flow change rate, therefore the pulse section is unavailable in practical applications, and because X2 is associated with X1 so that X2 values can not
It determines.Will ultimately result in this structure 0 stream of pulses magnitude of electric expansion valve it is bad accurately control, and flow curve front end is small opens
Differences of the 0~X2 of region due to valve opening pulse is spent, the precision that this section of pulse flow is adjusted is low, to cause entire valve in low pulse
Zone flow degree of regulation is relatively low.In addition, the electric expansion valve of this structure, when full off state, sealing cone 181 is and valve port 17
It is in contact, the abrasion of needle and valve port is be easy to cause when electric expansion valve is fully closed and rigid opening, thereby increases and it is possible to occur stuck existing
As.
Please refer to Fig. 3, Fig. 4, wherein Fig. 3 is that the needle during clearance type electric expansion valve valve opening is tied with valve port cooperation
Structure schematic diagram, Fig. 4 are the flow curves of clearance type electric expansion valve.
So-called clearance type refers to that one section isometrical section is arranged on the needle of electric expansion valve, and isometrical section of diameter is less than valve
Mouthful diameter, such needle and valve port can maintain certain gap when coordinating, to realize electric expansion valve it is fully closed when still
There is the purpose of partial discharge.
Needle 19 has isometrical section 191 and adjusts section 192, and isometrical section 191 cylindrical, and adjusts between section 192
Junction limits needle plane P3, and valve port 17 is identical as the above-mentioned structure of grooving type electric expansion valve, and diameter is set greater than
Isometrical section 191 of diameter.When electric expansion valve is in closed positions, such as Fig. 3（a）Shown, needle plane P3 is less than valve at this time
Valve port plane P4 where at the top of mouthful, isometrical at this time section is formed with certain gap between 191 and valve port 17, between being somebody's turn to do by control
Gap value ensures 0 stream of pulses magnitude, and therefore, this structure is very high to the requirement on machining accuracy of needle and valve port.Fig. 4 is please referred to,
The position relationship of needle and valve port such as Fig. 3 when X1 pulses（b）It is shown, at this point, needle plane P3 coincides with valve port plane P4,0
The width of~X1 pulse areas is related with debugging and machining accuracy, and the error in debugging process can make X1 waves in a certain range
It is dynamic so that X1 cannot be entirely controlled.In actual use, since 0~X1 flow values are constant, and X1 values are uncertain, so 0~X1
Regional pulse is unavailable, causes that pulse domain region can be used to reduce.Fig. 3（c）, Fig. 3（d）Respectively X2 pulses and when X3 pulses
Needle and valve port position, whether there is or not can be determined according to actual conditions for inflection point of the flow curve between X2 and X3.
As it can be seen that have a flow type electric expansion valve in the fully closed of the prior art, either grooving type or clearance type are deposited
0 pulse flow be not easy to accurately control and flow curve in there are the constant pulse sections of flow value（It is unable to fully profit
Pulse section）, to which the control accuracy of electric expansion valve can be caused to be affected.
Therefore, 0 pulse flow can be accurately controlled by how designing one kind, and can make to be free of flow value in flow curve
Invariant intervals make full use of electric expansion valve small guide vane region, are those skilled in the art's technical problems urgently to be resolved hurrily.
Invention content
The technical problem to be solved in the present invention is to provide a kind of electric expansion valve, which can solve existing skill
It is not easy to accurately control 0 pulse flow in art and is unable to fully the defect using small guide vane regional pulse.
In order to solve the above technical problems, the present invention provides a kind of electric expansion valve, including：
Electromagnetic coil, the electromagnetic coil apply pulse, the electric expansion valve response impulse are made to be acted；
Valve body offers valve port on the valve body；
Coordinate to carry out the needle of flow-rate adjustment to the electric expansion valve with valve port；
It is characterized in that, the needle includes main paragraph, the first conical surface portion for being disposed adjacent with the main paragraph, the valve
Mouth includes an isometrical straight section portion, and when the electromagnetic coil applies 0 pulse, the straight section portion is not contacted with the needle,
And plane where the top in the straight section portion and the intersection of the needle are located in first conical surface portion.
Preferably, the valve port also has the first valve port conical surface, the second valve port conical surface, the first valve port conical surface and described
The second valve port conical surface is arranged the both ends in the straight section portion, and extends each along the axial direction away from the straight section portion and interior
Diameter gradually increases.
Preferably, the intersection of the first valve port conical surface and plane and the needle where the boundary line in the straight section portion
Face is located in first conical surface portion.
Preferably, the maximum gauge of first conical surface portion is more than the internal diameter in the straight section portion.
Preferably, the needle includes the main paragraph being disposed adjacent successively, the first needle conical surface, the second needle conical surface, institute
The taper for stating the first needle conical surface is more than the taper of the second needle conical surface, plane where the top in the straight section portion with it is described
The intersection of needle is located on the second needle conical surface.
Preferably, the valve port also has the first valve port conical surface, the second valve port conical surface, the first valve port conical surface and described
The second valve port conical surface is arranged the both ends in the straight section portion, and extends each along the axial direction away from the straight section portion and interior
Diameter gradually increases；The intersection position of the first valve port conical surface and plane and the needle where the boundary line in the straight section portion
In on the second needle conical surface.
Preferably, the maximum gauge of the second valve port conical surface is more than the internal diameter in the straight section portion.
Preferably, the valve port includes straight section portion and conical surface portion, plane where the top in the straight section portion and the needle
Intersection be located on the second needle conical surface, the maximum gauge of the second needle conical surface is more than the interior of the straight section portion
Diameter.
Preferably, the valve port includes straight section portion and conical surface portion, plane where the top in the straight section portion and the needle
Intersection be located in first conical surface portion.
Electric expansion valve provided by the invention can accurately adjust flow in low stage pulse, can be in assembly
By adjusting the relative position of needle and valve port, and use flowmeter directly recalls the position of 0 pulse.The flow accuracy of 0 pulse
It is just dependent only on the measuring accuracy of flowmeter, and it is unrelated with the accuracy of manufacture of needle, valve port, 0 pulse can be greatlyd improve
The consistency of flow, and manufacturing cost can be greatly reduced.Flow is not present in the flow of electronic expansion valve curve of the present invention
It is worth constant section, therefore, small-pulse effect region can be made full use of to carry out flow-rate adjustment, to expand the tune of electric expansion valve
Adjusting range.
Description of the drawings
Fig. 1 is the needle and valve port fit structure schematic diagram during grooving type electric expansion valve valve opening in the prior art；
Fig. 2 is the corresponding flow curve of grooving type electric expansion valve；
Fig. 3 is the needle and valve port fit structure schematic diagram during clearance type electric expansion valve valve opening in the prior art；
Fig. 4 is the corresponding flow curve of clearance type electric expansion valve；
Fig. 5 is first embodiment of the invention electronic expansion valve structure schematic diagram；
Fig. 6 is the needle structure schematic diagram of electric expansion valve in first embodiment；
Needle and valve port fit structure schematic diagram when Fig. 7 is 0 pulse of electric expansion valve in first embodiment；
Needle and valve port fit structure schematic diagram when Fig. 8 is electric expansion valve valve opening in first embodiment；
Fig. 9 is the flow of electronic expansion valve curve graph of first embodiment；
Figure 10 is second embodiment of the invention electronic expansion valve needle and valve port fit structure schematic diagram；
Figure 11 is electronic expansion valve needle and valve port fit structure schematic diagram in third embodiment of the invention；
Figure 12 is electronic expansion valve needle and valve port fit structure schematic diagram in four embodiment of the invention；
Figure 13 is electronic expansion valve needle and valve port fit structure schematic diagram in fifth embodiment of the invention；
Figure 14 is electronic expansion valve needle and valve port fit structure schematic diagram in sixth embodiment of the invention.
Specific implementation mode
It is below in conjunction with the accompanying drawings and specific real in order to make those skilled in the art more fully understand technical scheme of the present invention
Applying example, the present invention is described in further detail.
First embodiment
Please refer to Fig. 5, Fig. 6.Wherein, Fig. 5 is first embodiment of the invention electronic expansion valve structure schematic diagram, and Fig. 6 is
The needle structure schematic diagram of electric expansion valve in first embodiment.
As shown in figure 5, electric expansion valve includes valve body 1 and coil（It is not shown in figure）, valve body 1 includes valve seat 11, connection
The first take over 12 and the second take over 13, the top of valve seat 11 on valve seat 11, for refrigerant circulation are also fixedly connected with shell
14, in the inside of shell 14, it is provided with the magnet rotor 15 rotated in response to the signal of coil, the silk being fixedly connected with magnet rotor 15
Bar 16, and coordinate with lead screw, by the nut 17 that the convert rotational motion of lead screw is elevating movement.Lead screw 16 is connected with needle 21
It connects, needle 21, by being matched with the valve port 22 being arranged on valve seat 11, and realizes electric expansion valve during elevating movement
Opening and closing.In order to set top dead centre and the lower dead center of needle elevating movement, it is additionally provided with stop device 18 and is limited.
It should be pointed out that electric expansion valve shown in fig. 5 is only a kind of specific embodiment, it is electric for convenience of description
The operation principle of sub- expansion valve and introduce, be based on above-mentioned operation principle, the variation and improvement of various structures can also be made, this
The core of invention is to provide the fit structure of the needle of electric expansion valve and valve port, and it is former based on above-mentioned work that it is suitable for any
The electric expansion valve of reason, therefore, the above-mentioned structure explanation to electric expansion valve do not make protection scope of the present invention any
It limits.
Needle structure is illustrated with reference to Fig. 6.
Needle 21 include the main paragraph 211 being connect with lead screw, the first needle conical surface 212 being connect with main paragraph 211 and
The second needle conical surface 213 being connect with the first needle conical surface 212, three is disposed adjacent successively.Wherein, the first needle conical surface 212
For coordinating with valve port, to determine that close valve state and 0 pulse flow, the first needle conical surface 212 and the second needle conical surface 213 are total
It is adjusted with the flow to valve port.The first needle conical surface 212 and the second needle conical surface 213 are in cone structure, and the first valve
The taper of the needle conical surface 212 is more than the taper of the second needle conical surface 213.In this way, the intersection in the two can be circumferentially formed one
Boundary line, the first plane of planes bound N1 where the boundary line.The third needle conical surface 214 positioned at needle bottom end is used for control figure
Inflection point in flow curve shown in 9 between X1~X2 pulses.
The fit structure schematic diagram of needle 21 and valve port 22 when Fig. 7 is 0 pulse of electric expansion valve, valve port 22 are substantially in cylinder
Shape, including the first valve port conical surface 221, straight section portion 222 and the second valve port conical surface 223 that set gradually, wherein straight section portion 222 are big
Body is cylindrical, and the first valve port conical surface 221 and the second valve port conical surface 223 prolong each along the axial direction away from straight section portion 222
It stretches, and gradually increases internal diameter, to form inner conical surface shape.The first valve port conical surface 221 shape same as the intersection in straight section portion 222
At a boundary line, for ease of description, being the second plane N2 by planes bound where the boundary line, as shown in Figure 7.
In 0 pulse, the first plane N1 is higher than the second plane N2, for needle 21, the second plane N2 and needle 21
Intersection is located at 223 on the second needle conical surface of needle 21, at this point, the first needle conical surface 212 does not connect with the first valve port conical surface 221
Touch, and needle 21 the first plane N1 diameter of section D1 be more than valve port 22 the second plane N2 section internal diameter D2, in this way
Sufficiently small flow can be produced.The second needle conical surface 213 is matched with straight section portion 222, is adjusted by rotating needle 21
Flow.With the rising of needle 21, position shown in Fig. 8 is reached.The flow curve such as Fig. 9 institutes formed according to above structure feature
Show.I.e. flow of the flow curve in 0 pulse is more than 0, and the curve rises according to certain slope, until needle fully open position,
It can be seen that the electric expansion valve can accurately adjust flow in low stage pulse.
Electric expansion valve, can be by adjusting the relative position of needle and valve port in assembly, and uses flowmeter direct
Recall the position of 0 pulse.Flowmeter access electric expansion valve is taken over, then controls the rotation of needle, debugs out 0 pulse
When, the relative position of needle and valve port makes electric expansion valve have certain initial flow, electronics provided by the invention so swollen
Swollen valve, the flow accuracy of 0 pulse are just dependent only on the measuring accuracy of flowmeter, and unrelated with the accuracy of manufacture of needle, valve port,
The consistency of 0 pulse flow can be greatlyd improve.
Simultaneously as diameter of section D1 of the needle 21 in the first plane N1（That is the maximum gauge of the second needle conical surface）It is more than
Section internal diameter D2 of the valve port 22 in the second plane N2（That is the internal diameter in valve port straight section portion）, theoretically, D1 can be designed as infinitely
Close to D2, in other words, the gap of needle and valve port can infinitely reduce when 0 pulse, i.e., the flow set of 0 pulse is infinitely small,
In this way, just being used in some special refrigeration systems of particularly suitable R32 refrigerants and refrigerator, water heater etc., so as to increase
The use scope of electric expansion valve.
In order to improve the consistency of 0 pulse flow, the angle of second conical surface 213 can be set smaller than 15 °, if the angle
It spends greatly, then will increase the inconsistency of 0 pulse flow.When valve body is fully closed, as shown in fig. 7, valve port 22 is located at the first plane
The lower section of N1, in valve body opening procedure, valve port directly coordinates with second conical surface 213 of needle 21 to adjust flow, and with the
One conical surface 212 is unrelated, in this way, electric expansion valve small guide vane zone flow is controllable, in systems, small guide vane region is available.
The electric expansion valve that present embodiment provides, there is no the sections that flow value is constant in flow curve, therefore, can be with
Small-pulse effect region is made full use of to carry out flow-rate adjustment, to expand the adjustable range of electric expansion valve.Needle is in complete simultaneously
When off status, needle is with valve port not in contact with so as to avoid the abrasion of needle and valve port.
10-14 below in conjunction with the accompanying drawings illustrates the other embodiment of the application.For ease of illustration other are implemented
The difference of mode and first embodiment uses same label for the identical component of structure and function.
Second embodiment
Figure 10 is please referred to, Figure 10 is that second embodiment of the invention electronic expansion valve needle is illustrated with valve port fit structure
Figure.
In the present embodiment, the structure of valve port 22 is identical with first embodiment, including the first valve port set gradually
The conical surface 221, straight section portion 222 and the second valve port conical surface 223, wherein straight section portion 222 is substantially cylindrical, the first valve port conical surface
221 and second the valve port conical surface 223 each along the axial direction extension away from straight section portion 222, and gradually increase internal diameter, to shape
At inner conical surface shape.The first valve port conical surface 221 and the intersection in straight section portion 222 form a boundary line, where plane be the
Two plane N2.
Needle 31 includes main part 311 and the first conical surface portion 312 being connect with main part, and the first conical surface portion 312 is most
Major diameter is more than the internal diameter in valve port straight section portion 222.In 0 pulse position, the intersection of the second plane N2 and needle 31 is located at the
In one conical surface portion 312.
0 pulse position adjusting method of present embodiment is identical with first embodiment, and details are not described herein.
Third embodiment
Figure 11 is please referred to, Figure 11 is that third embodiment of the invention electronic expansion valve needle is illustrated with valve port fit structure
Figure.
In the present embodiment, needle 21 is identical with first embodiment, include the main paragraph 211 being connect with lead screw, with
The first needle conical surface 212 that main paragraph 211 connects and the second needle conical surface 213 being connect with the first needle conical surface 212, third
The needle conical surface 214 can be configured according to the needs of flow-rate adjustment.
Valve port 32 is generally substantially in the straight section portion 321 of hollow cylindrical, is not provided with conical surface portion, the second needle conical surface 213
Maximum gauge be more than straight section 321 internal diameter.The top of valve port limits the second plane N2, the intersection of the second plane N2 and needle 21
Face is located on the second needle conical surface 213 of needle 21.0 pulse position adjusting method and the first embodiment phase of present embodiment
Together, details are not described herein.
4th embodiment
Figure 12 is please referred to, Figure 12 is that electronic expansion valve needle is illustrated with valve port fit structure in four embodiment of the invention
Figure.
In the present embodiment, needle 21 is identical with first embodiment, include the main paragraph 211 being connect with lead screw, with
The first needle conical surface 212 that main paragraph 211 connects and the second needle conical surface 213 being connect with the first needle conical surface 212.
Valve port 42 include substantially be in the straight section portion 421 of hollow cylindrical and the conical surface portion 422 that is disposed adjacent with straight section portion,
The internal diameter in straight section portion 421 is less than the maximum gauge of the second needle conical surface 213.The top in straight section portion 421 limits the second plane N2, the
The intersection of two plane N2 and needle 21 are located on the second needle conical surface 213 of needle 21.
5th embodiment
Figure 13 is please referred to, Figure 13 is that electronic expansion valve needle is illustrated with valve port fit structure in fifth embodiment of the invention
Figure.
In present embodiment, valve port 32 is identical as third embodiment, is generally substantially in the straight section portion of hollow cylindrical
321, it is not provided with conical surface portion, the top of valve port limits the second plane N2.The structure of needle 31 is identical as second embodiment, including
The maximum gauge of main part 311 and the first conical surface portion 312 being connect with main part, the first conical surface portion 312 is more than straight section portion 321
Internal diameter.
In 0 pulse position, the intersection of the second plane N2 and needle 31 are located in the first conical surface portion 312.Second plane
The intersection of N2 and needle 21 are located on the second needle conical surface 213 of needle 21.
Sixth embodiment
Figure 14 is please referred to, Figure 14 is that electronic expansion valve needle is illustrated with valve port fit structure in sixth embodiment of the invention
Figure；
In the present embodiment, the structure of valve port is identical as the 4th embodiment, and valve port 42 includes substantially in hollow cylinder
The top of the straight section portion 421 of shape and the conical surface portion 422 being disposed adjacent with straight section portion, straight section portion 421 limits the second plane N2.
The structure of needle 31 is identical as second embodiment, and needle 31 includes main part 311 and connect with main part
First conical surface portion 312, the maximum gauge of the first conical surface portion 312 are more than the internal diameter in straight section portion 421.Second plane N2 and needle 21
Intersection is located on the second needle conical surface 213 of needle 21.
It should be added that in the above-described embodiment, the lowermost end of needle is additionally provided with one section in conical surface shape
End is used in flow curve shown in control figure 9, whether there is inflection point between X1-X2 pulses.Because it is for low pulse rank
The flow-rate adjustment influence of section is smaller, therefore is not described in detail in the above-described embodiment.
Electric expansion valve provided by the present invention is described in detail above.Specific case used herein is to this
The principle and embodiment of invention is expounded, the explanation of above example is only intended to help understand the present invention method and
Its core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection of the claims in the present invention
In range.
Claims (9)
1. electric expansion valve, including：
Electromagnetic coil, the electromagnetic coil apply pulse, the electric expansion valve response impulse are made to be acted；
Valve body offers valve port on the valve body；
Coordinate to carry out the needle of flow-rate adjustment to the electric expansion valve with valve port；
It is characterized in that,
The first conical surface portion that the needle includes main paragraph, is disposed adjacent with the main paragraph, the valve port include one isometrical
Straight section portion, when the electromagnetic coil apply 0 pulse when, the straight section portion is not contacted with the needle, and the straight section portion
Top where the intersection of plane and the needle be located in first conical surface portion.
2. electric expansion valve as described in claim 1, which is characterized in that the valve port also has the first valve port conical surface, second
The valve port conical surface, the first valve port conical surface and the second valve port conical surface are arranged at the both ends in the straight section portion, and each along the back of the body
Axial direction from the straight section portion extends and internal diameter gradually increases.
3. electric expansion valve as claimed in claim 2, which is characterized in that the friendship of the first valve port conical surface and the straight section portion
Plane and the intersection of the needle where boundary line are located in first conical surface portion.
4. the electric expansion valve as described in claim 1 or 3, which is characterized in that the maximum gauge of first conical surface portion is more than
The internal diameter in the straight section portion.
5. electric expansion valve, including：
Electromagnetic coil, the electromagnetic coil apply pulse, the electric expansion valve response impulse are made to be acted；
Valve body offers valve port on the valve body；
Coordinate to carry out the needle of flow-rate adjustment to the electric expansion valve with valve port；
It is characterized in that, the needle includes the main paragraph being disposed adjacent successively, the first needle conical surface, the second needle conical surface, institute
The taper for stating the first needle conical surface is more than the taper of the second needle conical surface, and the valve port includes an isometrical straight section portion,
When the electromagnetic coil applies 0 pulse, the straight section portion is not contacted with the needle, plane where the top in the straight section portion
It is located on the second needle conical surface with the intersection of the needle.
6. electric expansion valve as claimed in claim 5, which is characterized in that the valve port also has the first valve port conical surface, second
The valve port conical surface, the first valve port conical surface and the second valve port conical surface are arranged at the both ends in the straight section portion, and each along the back of the body
Axial direction from the straight section portion extends and internal diameter gradually increases；The boundary of the first valve port conical surface and the straight section portion
Plane and the intersection of the needle where line are located on the second needle conical surface.
7. such as electric expansion valve described in claim 5 or 6, which is characterized in that the maximum gauge of the second valve port conical surface is big
Internal diameter in the straight section portion.
8. electric expansion valve as claimed in claim 5, which is characterized in that the valve port includes straight section portion and conical surface portion, described
Plane where the top in straight section portion and the intersection of the needle are located on the second needle conical surface, the second needle conical surface
Maximum gauge be more than the straight section portion internal diameter.
9. electric expansion valve as described in claim 1, which is characterized in that the valve port includes straight section portion and conical surface portion, described
Plane where the top in straight section portion and the intersection of the needle are located in first conical surface portion.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101289.6A CN104930241B (en) | 2014-03-19 | 2014-03-19 | Electric expansion valve |
| JP2016556804A JP6446468B2 (en) | 2014-03-19 | 2015-03-19 | Electronic expansion valve |
| KR1020167028867A KR101921523B1 (en) | 2014-03-19 | 2015-03-19 | Electronic expansion valve |
| PCT/CN2015/074590 WO2015139647A1 (en) | 2014-03-19 | 2015-03-19 | Electronic expansion valve |
| US15/125,839 US10295064B2 (en) | 2014-03-19 | 2015-03-19 | Electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410101289.6A CN104930241B (en) | 2014-03-19 | 2014-03-19 | Electric expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104930241A CN104930241A (en) | 2015-09-23 |
| CN104930241B true CN104930241B (en) | 2018-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410101289.6A Active CN104930241B (en) | 2014-03-19 | 2014-03-19 | Electric expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104930241B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105972233A (en) * | 2016-07-20 | 2016-09-28 | 珠海格力电器股份有限公司 | Expansion valve, refrigerant circulation system and air conditioner |
| CN108253159A (en) * | 2016-12-29 | 2018-07-06 | 比亚迪股份有限公司 | Expand switch valve |
| JP6740179B2 (en) * | 2017-06-23 | 2020-08-12 | 株式会社鷺宮製作所 | Motorized valve and refrigeration cycle system |
| JP6659624B2 (en) * | 2017-06-23 | 2020-03-04 | 株式会社鷺宮製作所 | Motorized valve and refrigeration cycle system |
| CN109323006B (en) * | 2017-08-01 | 2022-03-08 | 浙江盾安机械有限公司 | Electronic expansion valve |
| WO2019030243A1 (en) | 2017-08-07 | 2019-02-14 | Plastic Omnium Advanced Innovation And Research | Stepper driven valve for controlling fluid communication between a fuel tank and a canister |
| CN110836269B (en) * | 2018-08-17 | 2021-09-28 | 浙江盾安禾田金属有限公司 | Electronic expansion valve and air conditioning system using same |
| CN110873221A (en) * | 2018-08-29 | 2020-03-10 | 盾安环境技术有限公司 | Electronic expansion valve assembling process |
| CN109458464B (en) * | 2018-11-20 | 2024-03-22 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| JP7006981B2 (en) * | 2020-09-08 | 2022-01-24 | 株式会社不二工機 | Solenoid valve |
| CN113483453A (en) * | 2021-07-13 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method and device for air conditioning equipment, electronic equipment and storage medium |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3742853B2 (en) * | 1999-05-12 | 2006-02-08 | ダイキン工業株式会社 | Electric needle valve for refrigeration circuit and refrigeration apparatus provided with the same |
| JP2001027458A (en) * | 1999-07-15 | 2001-01-30 | Daikin Ind Ltd | Refrigeration device |
| JP2005016630A (en) * | 2003-06-26 | 2005-01-20 | Pacific Ind Co Ltd | Valve plug and valve |
| JP4550528B2 (en) * | 2004-09-01 | 2010-09-22 | 株式会社不二工機 | Motorized valve |
| CN100547272C (en) * | 2006-08-31 | 2009-10-07 | 浙江三花制冷集团有限公司 | A kind of mortor operated valve |
| JP2008128603A (en) * | 2006-11-24 | 2008-06-05 | Pacific Ind Co Ltd | Electric expansion valve |
| CN201121713Y (en) * | 2007-11-06 | 2008-09-24 | 浙江三花股份有限公司 | Valve structure and electronic expansion valve |
| CN102410395B (en) * | 2010-09-20 | 2014-03-19 | 浙江三花股份有限公司 | Electronic expansion valve |
| JP2014142136A (en) * | 2013-01-24 | 2014-08-07 | Pacific Ind Co Ltd | Electric expansion valve |
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2014
- 2014-03-19 CN CN201410101289.6A patent/CN104930241B/en active Active
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| CN104930241A (en) | 2015-09-23 |
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