CN106641430B - Novel electronic expansion valve - Google Patents
Novel electronic expansion valve Download PDFInfo
- Publication number
- CN106641430B CN106641430B CN201610889497.6A CN201610889497A CN106641430B CN 106641430 B CN106641430 B CN 106641430B CN 201610889497 A CN201610889497 A CN 201610889497A CN 106641430 B CN106641430 B CN 106641430B
- Authority
- CN
- China
- Prior art keywords
- valve
- groove
- hole
- wall
- bearing seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002955 isolation Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 30
- 230000030279 gene silencing Effects 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 15
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 229920000459 Nitrile rubber Polymers 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 230000036541 health Effects 0.000 abstract description 4
- 230000003584 silencer Effects 0.000 abstract 1
- 241001233242 Lontra Species 0.000 description 6
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
- F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
- F16C2361/91—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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)
Abstract
The invention discloses a novel electronic expansion valve, which comprises a valve seat, wherein a bearing seat is arranged on the valve seat, a valve rod is matched on the bearing seat, a through groove which penetrates through the valve seat up and down is formed on the valve seat, the matched bearing seat is inserted into the through groove, the valve rod is arranged in the bearing seat, a matched straight pipe is welded at the bottom end of the through groove, a side surface hole communicated with the through groove is formed in the outer wall of the valve seat, a matched bent pipe is welded in the side surface hole, an isolation sleeve is welded on the outer wall of the valve seat, and a magnetic rotor is arranged outside the upper end of the valve rod; the silencer is also included, so that the flow rate of gas can be effectively blocked, noise is reduced, and a certain health guarantee is provided for life of people.
Description
Technical Field
The invention relates to a novel electronic expansion valve.
Background
At present, electronic expansion valves at home and abroad are various in variety and different in structural characteristics, but throttle structures of the electronic expansion valves are different in size and mainly are cone valve structures. When the valve rod in the electronic expansion valve moves axially in the fully closing direction, the valve rod starts to generate axial pressure on the valve needle when the valve needle in the electronic expansion valve contacts with the valve hole below. When the electronic expansion valve is in the fully closed state, the axial pressure generated by the valve rod and the valve needle is maximum, because the valve needle is in the static state when in the fully closed state, the spring in the valve rod is pressed downwards by the valve rod, so that the spring is compressed; when the compression amount of the spring reaches a certain degree, the pressure born by the valve needle reaches the maximum; at the same time, the spring inside the valve rod generates an elastic force (namely, the valve needle generates a reverse axial pressure to the valve rod), and at the moment, the friction force between the external thread of the valve rod and the internal thread of the valve body is increased. When the air inlet pipe is filled with high-pressure air, and the electronic expansion valve is in a closed state, the valve needle seals the valve hole, and the high pressure at the upper end of the valve hole is larger than the low pressure at the lower end of the valve hole, so that a positive pressure difference is formed, and the high-pressure air generates an axial pressure on the valve needle. Therefore, the friction force between the external thread of the valve rod inside the electronic expansion valve and the internal thread of the valve body is increased due to the generation of the axial pressure, and the electronic expansion valve is more likely to be blocked because the driving force generated by the stepping motor is smaller than the reactive torque.
The valve needle in the cone valve structure has a certain clearance with the valve hole below the valve needle. The presence of these gaps results in an increase in the amount of gas leakage.
Also, in such a cone valve structure, linearity of the flow rate characteristics of the electronic expansion valve is not ideal, that is, in the case of a constant condition (constant differential pressure), the flow rate and the opening degree are not in a proportional relationship, but in a curved relationship, which approximates to a quadratic curve. Such quadratic flow characteristics are disadvantageous for accurate control of the flow rate, because the flow rate is not changed identically for changing the same number of openings, so that the difficulty of control is great and accurate control of the flow rate is not possible. Based on the above, in order to improve the flow characteristics of the numerical control flow, the inherent defect of the cone valve structure must be broken through, and the electronic expansion valve is innovated, so that a more reasonable throttling structure is invented. The reasonable throttling structure can change the flow regulation characteristic of the numerical control flow essentially, thereby improving the performance of the numerical control flow, enabling the control to meet the system requirement and achieving the effects of accuracy and energy conservation.
In addition, when the electronic expansion valve is opened, the gas flow rate is increased along with the increase of the opening degree. Wherein the sound emitted by the outlet end also becomes louder and louder. Electronic expansion valves are known to be flow control valves in refrigeration systems, such as electronic expansion valves used in air conditioning applications. The air conditioner is an indispensable household electrical appliance in the life of people at present, and because the air conditioner always has noise in operation, the air conditioner has certain influence on the life and health of people. In this way, noise is eliminated, and a guarantee is provided for improving the life quality and physical quality of people. In view of this, the present inventors have proposed improvements to meet the market demand.
Disclosure of Invention
The present invention aims to provide a novel electronic expansion valve which can solve the above-mentioned disadvantages and technical problems in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The novel electronic expansion valve comprises a valve seat, wherein a bearing seat is arranged on the valve seat, a valve rod is matched on the bearing seat, a through groove which is vertically penetrated is formed on the valve seat, the matched bearing seat is inserted in the through groove, the valve rod is arranged in the bearing seat, a matched straight pipe is welded at the bottom end of the through groove, a side hole communicated with the through groove is arranged on the outer wall of the valve seat, a matched bent pipe is welded at the side hole, an isolation sleeve is welded on the outer wall of the valve seat, and a magnetic rotor is arranged outside the upper end of the valve rod; the method is characterized in that: also comprises a silencing device.
The invention is further provided with the silencing device which is a silencing screen plate, and the silencing screen plate is positioned between the straight pipe and the through groove.
The invention is further provided with the silencing screen plate which is made of brass or red copper and is porous.
The invention is further provided with a limiting static spring coaxially arranged on the outer wall of the bearing seat, and a limiting movable spring is embedded in a spiral groove of the limiting static spring; the spring blocking end of the magnetic rotor is contacted with a transverse cylinder of the limiting movable spring, a positioning hole groove is formed in the outer wall of the upper port of the bearing seat, and the positioning hole groove is used for fixing a transverse groove of the limiting static spring.
The invention is further provided with the O-shaped holes for placing the silencing screen plate are formed at the middle lower part of the through groove.
The invention is further provided with an annular groove at the outer wall of the upper port of the valve seat, and a positioning hole penetrating through the annular groove is arranged below the annular groove; and a spring ring is arranged at the annular groove.
The invention is further provided with a through hole formed on the bearing seat, a round groove is formed on the inner wall of the lower port of the through hole, and a polytetrafluoroethylene sealing gasket is arranged in the round groove; a waist-shaped valve hole communicated with the through hole is formed on the outer wall of the lower end of the bearing seat, the central line of the waist-shaped valve hole is consistent with the vertical central line of the side hole, an annular sealing groove is arranged above the waist-shaped valve hole, and a hydrogenated nitrile rubber sealing ring is arranged in the annular sealing groove; the outer wall of the middle part of the bearing seat is provided with 2 first transverse hole columns which are communicated with the through holes and are positioned on the same straight line.
The invention is further provided with the valve rod, the valve rod comprises a rod body, an inner axial hole column is formed at the lower end of the rod body, a sealing groove and a ring groove are formed on the outer wall of the middle part of the inner axial hole column, a second transverse hole column communicated with the inner axial hole column is formed on the outer wall of the bottom of the inner axial hole column, 2 second transverse hole columns are positioned on the same straight line, and an external thread section is formed on the outer wall of the middle part of the rod body.
Compared with the prior art, the invention has the following beneficial effects:
The invention comprises the silencing device, namely the silencing screen plate, can effectively block the flow rate of gas, reduce noise and provide a certain health guarantee for life of people. Meanwhile, the invention improves the valve body and the bearing seat, and the transverse shaft holes are arranged on the valve body and the bearing seat, so that the pressure intensity in the electronic expansion valve is equal to the pressure intensity of the air outlet end, the axial pressure of air to the valve rod is eliminated, meanwhile, the 2 seal grooves are arranged on the outer wall of the valve body, the tightness between the two seal grooves is greatly improved, the increase of the air leakage amount is prevented, and the circular groove is arranged in the bearing seat, and is internally provided with the polytetrafluoroethylene sealing gasket, so that good sealing is formed between the bottom of the valve body and the polytetrafluoroethylene sealing gasket, the increase of the air leakage amount is prevented, meanwhile, the two ring grooves above the bottom of the valve rod are improved, and the control precision of the flow output is improved.
According to the technical scheme, under the condition that the whole appearance structure is kept unchanged, noise in the using process can be reduced, the axial pressure borne by the valve rod can be eliminated, a good sealing effect is achieved, the increase of gas leakage is prevented, meanwhile, the valve can be modified into other series of electronic expansion valves, and at present, the valve can only be applied to 11 series of electronic expansion valves, so that the economic cost is greatly reduced, and the valve is environment-friendly.
Drawings
The invention is described in detail below with reference to the attached drawings and detailed description:
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of a valve seat portion in the present invention.
Fig. 3 is a cross-sectional view of a bearing housing in accordance with the present invention.
Fig. 4 is a cross-sectional view of the middle valve body of the present user.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, the novel electronic expansion valve comprises a valve seat 1, wherein a bearing seat 2 is arranged on the valve seat 1, a valve rod 3 is matched on the bearing seat 2, a through groove 11 which is vertically penetrated is formed on the valve seat 1, the matched bearing seat 2 is inserted into the through groove 11, the valve rod 3 is arranged in the bearing seat 2, a matched straight pipe 4 is welded at the bottom end of the through groove 11, a side hole 12 communicated with the through groove 11 is arranged on the outer wall of the valve seat 1, a matched bent pipe 5 is welded in the side hole 12, an isolating sleeve 6 is welded on the outer wall of the valve seat 1, and a magnetic rotor 7 is arranged outside the upper end of the valve rod 3; the method is characterized in that: still include silencing device, silencing device is a amortization otter board 8, amortization otter board 8 is located straight tube 4 with lead to between the groove 11, amortization otter board 8 adopt the material be brass or red copper, become porous form. This setting of amortization otter board 8 can block gaseous velocity of flow effectively, has reduced the noise, provides certain health guarantee to people's life, the well lower part department in logical groove forms the O type hole 9 that is used for amortization otter board 8 to place, places amortization otter board in O type hole 9, realizes good installation.
In the invention, a coaxially installed limit static spring 21 is arranged on the outer wall of the bearing seat 2, and a limit movable spring 22 is embedded in a spiral groove of the limit static spring 21; the spring blocking end of the magnetic rotor 7 is contacted with a transverse cylinder of the limit movable spring 22, a positioning hole groove 23 is arranged on the outer wall of the upper port of the bearing seat 2, and the positioning hole groove 23 is used for fixing a transverse groove of the limit static spring 21.
In the invention, an annular groove 13 is arranged at the outer wall of the upper port of the valve seat 1, and a positioning hole 15 penetrating through is arranged below the annular groove 13; a spring ring is arranged at the annular groove 13.
In the invention, a through hole 24 is formed on the bearing seat 2, a circular groove 25 is formed on the inner wall of the lower port of the through hole 24, and a polytetrafluoroethylene sealing gasket 101 is arranged in the circular groove 25; a waist-shaped valve hole 26 communicated with the through hole 24 is formed on the outer wall of the lower end of the bearing seat 2, the central line of the waist-shaped valve hole 26 is consistent with the vertical central line of the side surface hole 12, an annular sealing groove 27 is arranged above the waist-shaped valve hole 26, and a hydrogenated nitrile rubber sealing ring 102 is arranged in the annular sealing groove 27; a first transverse hole column 28 communicated with the through holes 24 is formed on the outer wall of the middle part of the bearing seat 2,2 first transverse hole columns 28 are positioned on the same straight line, and an internal thread section 29 is formed in the through holes 24.
In the invention, the valve rod 3 comprises a rod body 31, an inner axial hole column 32 is formed at the lower end of the rod body 31, a sealing groove 33 and a ring groove 34 are formed on the outer wall of the middle part of the inner axial hole column 32, second transverse hole columns 35 communicated with the inner axial hole column 32 are formed on the outer wall of the bottom of the inner axial hole column 32, 2 second transverse hole columns 35 are positioned on the same straight line, an external thread section 36 is formed on the outer wall of the middle part of the rod body 31, and a hydrogenated nitrile-butadiene rubber sealing ring 102 is placed in the sealing groove 33.
In the actual installation process, firstly, the silencing screen plate 8 is arranged at the lower end of the O-shaped hole 9 of the valve seat 1; then two welding rings which are soaked by purified water containing brazing flux are put in, and the side holes 12 of the valve seat 1 and the lower end of the silencing screen 8 are arranged; and finally embedding the bent pipe and the straight pipe. And finally, performing brazing operation by the staff.
Assembling the valve body: an annular sealing groove 27 is arranged below the bearing seat 2, and then a hydrogenated nitrile rubber sealing ring 102 with the size conforming to the annular sealing groove 27 is embedded; a polytetrafluoroethylene sealing gasket 101 is arranged in the circular groove 25 at the lower end of the bearing seat 2; the bearing housing 2 is inserted into the valve seat 1. Wherein the center line of the waist-shaped valve hole 26 of the bearing seat 2 is consistent with the vertical center line of the side hole 12 of the valve seat 1. Secondly, the bearing seat 2 is buckled on the valve seat 1 through tool pressing, and the positioning pin 14 is embedded into the positioning hole 15 on the valve seat 1 through extrusion, so that the assembly of the valve body is completed.
The valve stem 3 is further fitted into the bearing housing 2 by clockwise twisting. And then a limit static spring 21 is arranged on the bearing seat 2. The limit static spring 21 is coaxial with the bearing seat 2, and the transverse groove of the limit static spring 21 is fixed on the positioning hole groove 23 of the bearing seat 2.
A limit moving spring 22 is further installed, and the limit moving spring 22 is not only coaxial with the bearing seat 2, but also is positioned on a spiral groove between an upper limit point and a lower limit point of the limit static spring 21.
The limit moving spring 22 is further twisted to the lower limit point of the limit static spring 21. Secondly, two hydrogenated nitrile rubber sealing rings 102 are embedded in the two sealing grooves 33 of the valve rod 3, and the valve opening angle of the electronic expansion valve is determined by measuring the distance between the uppermost end of the bearing seat 2 and the top of the valve rod 3. Then, the magnetic rotor 7 is fitted into the valve stem 3, and it is confirmed that the spring blocking end of the magnetic rotor 7 is in contact with one of the lateral cylinders of the stopper moving spring 22. The magnetic rotor 7 is then joined to the valve stem 3 by laser welding. At the same time, the spacer tube 6 is welded to the valve seat 1.
Wherein, the embodiment of eliminating the axial pressure of the valve rod 3: when gas is introduced into the valve body elbow, no matter what state the electronic expansion valve is in, the gas flows in from the first transverse hole column 28 of the bearing seat 2, then flows into the second transverse hole column 35 of the valve rod 3, flows out from the inner axial hole column 32 of the valve rod 3, so that the pressure inside the electronic expansion valve is equal to the pressure of the air outlet end, and the axial pressure of the gas to the valve rod 3 is eliminated.
The electronic expansion valve is in a fully closed state, and the sealing rings sleeved on the two sealing grooves 33 of the valve rod 3 are contacted with the inner wall of the bearing seat 2, so that gas is prevented from flowing into the electronic expansion valve from a gap between the bearing seat 2 and the valve rod 3 and flowing out of the straight pipe finally through the second transverse hole column 35 of the valve rod 3, and the gas leakage is increased. In the same way, the sealing ring on the bearing seat 2 also prevents an increase in the amount of gas leakage. Also, by matching the polytetrafluoroethylene gasket 101 and the valve stem 3, the gap between them is eliminated, the passage of gas through the gap between them is effectively blocked, and the increase of the gas leakage amount is prevented.
The flow control precision of the electronic expansion valve is improved, specifically, when gas is introduced into the valve rod 3 through the two annular grooves 34, the peripheries of the two annular grooves 34 are constant, and the valve rod 3 is prevented from generating a tendency pressure when being subjected to air pressure. As the number of open valve pulse steps increases, the flow rate of the gas increases, and the flow characteristic curve of the gas becomes a linear state.
Under the drive of the stepping motor, the resistance of the valve rod 3 in the rotating process is as follows: friction between the external thread section 36 of the valve stem 3 and the internal thread section 29 of the bearing seat 2; friction between the hydrogenated nitrile rubber seal 102 and the inner wall of the bearing seat 2; friction between the bottom of the valve stem 3 and the polytetrafluoroethylene seal 101. Since these frictional forces are always present, but are always much smaller than the driving force generated by the stepper motor. Meanwhile, because of the part characteristics of the valve rod 3 and the bearing seat 2, the axial pressure of the air pressure on the valve rod 3 is eliminated, and the pressure balance between the internal pressure of the electronic expansion valve and the air outlet end is ensured. Meanwhile, the service life of the electronic expansion valve is prolonged due to the reduction of friction force. The two annular grooves 34 above the bottom of the valve rod 3 improve the control accuracy of flow output. The intervention of the silencing screen 8 accords with the green and environment-friendly theme.
According to the technical scheme, the structural characteristics of parts are adopted, the manufacturing process is simple, the overall appearance structure is kept unchanged by changing the sizes of the valve hole and the valve rod, and the electronic expansion valve can be modified into other series of electronic expansion valves, and at present, the electronic expansion valve is only suitable for 11 series of electronic expansion valves, so that the economic cost is greatly reduced, and the electronic expansion valve is environment-friendly.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The novel electronic expansion valve comprises a valve seat, wherein a bearing seat is arranged on the valve seat, a valve rod is matched on the bearing seat, a through groove which is vertically penetrated is formed on the valve seat, the matched bearing seat is inserted in the through groove, the valve rod is arranged in the bearing seat, a matched straight pipe is welded at the bottom end of the through groove, a side hole communicated with the through groove is arranged on the outer wall of the valve seat, a matched bent pipe is welded at the side hole, an isolation sleeve is welded on the outer wall of the valve seat, and a magnetic rotor is arranged outside the upper end of the valve rod; the method is characterized in that: also comprises a silencing device;
Forming a through hole on the bearing seat, forming a circular groove on the inner wall of the lower port of the through hole, and arranging a polytetrafluoroethylene sealing gasket in the circular groove; a waist-shaped valve hole communicated with the through hole is formed on the outer wall of the lower end of the bearing seat, the central line of the waist-shaped valve hole is consistent with the vertical central line of the side hole, an annular sealing groove is arranged above the waist-shaped valve hole, and a hydrogenated nitrile rubber sealing ring is arranged in the annular sealing groove; a first transverse hole column communicated with the through holes is formed on the outer wall of the middle part of the bearing seat, and the number of the first transverse hole columns is 2 and is positioned on the same straight line;
The valve rod comprises a rod body, an inner axial hole column is formed at the lower end of the rod body, a sealing groove and a ring groove are formed on the outer wall of the middle part of the inner axial hole column, a second transverse hole column communicated with the inner axial hole column is formed on the outer wall of the bottom of the inner axial hole column, the number of the second transverse hole columns is 2 and is in the same straight line, and an external thread section is formed on the outer wall of the middle part of the rod body.
2. The novel electronic expansion valve of claim 1, wherein: the silencing device is a silencing screen plate, and the silencing screen plate is located between the straight pipe and the through groove.
3. The novel electronic expansion valve of claim 2, wherein: the silencing screen plate is made of brass or red copper and is porous.
4. The novel electronic expansion valve of claim 1, wherein: the outer wall of the bearing seat is provided with a coaxially-mounted limit static spring, and a limit movable spring is embedded in a spiral groove of the limit static spring; the spring blocking end of the magnetic rotor is contacted with a transverse cylinder of the limiting movable spring, a positioning hole groove is formed in the outer wall of the upper port of the bearing seat, and the positioning hole groove is used for fixing a transverse groove of the limiting static spring.
5. The novel electronic expansion valve of claim 2, wherein: and an O-shaped hole for placing the silencing screen plate is formed at the middle lower part of the through groove.
6. The novel electronic expansion valve of claim 1, wherein: an annular groove is formed in the outer wall of the upper port of the valve seat, and a through positioning hole is formed below the annular groove; and a spring ring is arranged at the annular groove.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889497.6A CN106641430B (en) | 2016-10-12 | 2016-10-12 | Novel electronic expansion valve |
| PCT/CN2017/098582 WO2018068585A1 (en) | 2016-10-12 | 2017-08-23 | Novel electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610889497.6A CN106641430B (en) | 2016-10-12 | 2016-10-12 | Novel electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106641430A CN106641430A (en) | 2017-05-10 |
| CN106641430B true CN106641430B (en) | 2024-04-26 |
Family
ID=58855715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610889497.6A Active CN106641430B (en) | 2016-10-12 | 2016-10-12 | Novel electronic expansion valve |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106641430B (en) |
| WO (1) | WO2018068585A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641430B (en) * | 2016-10-12 | 2024-04-26 | 诸暨市亿霸电子阀门有限公司 | Novel electronic expansion valve |
| CN109469997B (en) * | 2017-09-07 | 2021-10-29 | 浙江三花智能控制股份有限公司 | Refrigerating system and electronic expansion valve thereof |
| EP3904734A4 (en) * | 2018-12-25 | 2022-12-14 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and air conditioning system using same |
| CN111365479B (en) * | 2018-12-26 | 2022-08-26 | 浙江盾安禾田金属有限公司 | Electronic expansion valve |
| CN111379872B (en) * | 2018-12-28 | 2021-06-08 | 浙江三花制冷集团有限公司 | Flow control valve |
| CN110230722B (en) * | 2019-07-10 | 2024-02-27 | 诸暨市亿霸电子阀门有限公司 | Electronic expansion valve |
| JP7293038B2 (en) * | 2019-08-09 | 2023-06-19 | 株式会社鷺宮製作所 | Motor-operated valve and refrigeration cycle system including the same |
| CN110513532A (en) * | 2019-08-15 | 2019-11-29 | 浙江盾安禾田金属有限公司 | Valve muffler and electric expansion valve with the valve muffler |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2190205Y (en) * | 1994-06-03 | 1995-02-22 | 曾祥炜 | Shutoff valve |
| JPH09196195A (en) * | 1996-01-23 | 1997-07-29 | Mitsubishi Heavy Ind Ltd | Steam govering valve |
| CN2637833Y (en) * | 2003-07-02 | 2004-09-01 | 浙江三花集团有限公司 | Electron expansion valve used for flow restriction prossure reducing and regualting flow quantity |
| CN2846913Y (en) * | 2005-12-08 | 2006-12-13 | 浙江中宝自控元件有限公司 | Electronic expansion valve |
| JP2007010074A (en) * | 2005-07-01 | 2007-01-18 | Saginomiya Seisakusho Inc | Electromotive control valve |
| CN200952570Y (en) * | 2006-09-18 | 2007-09-26 | 浙江中宝自控元件有限公司 | Electronic expansion valve |
| CN101403438A (en) * | 2008-11-10 | 2009-04-08 | 上海高迪亚电子系统有限公司 | Magnetic driving electronic expansion valve |
| JP2010112539A (en) * | 2008-11-10 | 2010-05-20 | Cci Kk | Pressure balance type control valve |
| CN102996838A (en) * | 2012-12-13 | 2013-03-27 | 浙江师范大学 | Intelligent large-flow electro-hydraulic valve |
| CN103470785A (en) * | 2013-09-30 | 2013-12-25 | 苏州优冷机电科技有限公司 | Electronic expansion valve |
| CN103574062A (en) * | 2012-08-06 | 2014-02-12 | 珠海格力电器股份有限公司 | Electronic expansion valve |
| WO2014029348A1 (en) * | 2012-08-23 | 2014-02-27 | 丹佛斯（天津）有限公司 | Moving iron core assembly and electromagnetic valve using same |
| CN103807480A (en) * | 2012-11-12 | 2014-05-21 | 浙江盾安禾田金属有限公司 | Thermal expansion valve |
| JP2015001257A (en) * | 2013-06-14 | 2015-01-05 | ジヤトコ株式会社 | Hydraulic control valve |
| CN104565401A (en) * | 2013-10-22 | 2015-04-29 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| CN104633212A (en) * | 2015-02-03 | 2015-05-20 | 诸暨市亿霸电子阀门有限公司 | Valve body for numerical control flow valve |
| JP2015098909A (en) * | 2013-11-19 | 2015-05-28 | 株式会社鷺宮製作所 | On-off valve |
| WO2015078096A1 (en) * | 2013-11-29 | 2015-06-04 | 宁波西文电器有限公司 | Two-way pressure relief valve |
| CN204403425U (en) * | 2014-12-31 | 2015-06-17 | 云南天创科技有限公司 | A kind of embolism formula liquid discharging valve |
| CN105841410A (en) * | 2015-01-13 | 2016-08-10 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN205534555U (en) * | 2016-01-26 | 2016-08-31 | 浙江三花股份有限公司 | Electronic expansion valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5977179A (en) * | 1982-10-27 | 1984-05-02 | Syst Hoomuzu:Kk | Electronic expansion valve |
| JP2001050598A (en) * | 2001-02-21 | 2001-02-23 | Mitsubishi Heavy Ind Ltd | Autonomous regulating valve and compression type refrigerator having the same |
| CN201121713Y (en) * | 2007-11-06 | 2008-09-24 | 浙江三花股份有限公司 | Valve structure and electronic expansion valve |
| CN203176392U (en) * | 2013-04-26 | 2013-09-04 | 浙江景加源机械有限公司 | Electronic expansion valve |
| CN106641430B (en) * | 2016-10-12 | 2024-04-26 | 诸暨市亿霸电子阀门有限公司 | Novel electronic expansion valve |
| CN106678421B (en) * | 2017-01-12 | 2024-02-02 | 诸暨市亿霸电子阀门有限公司 | Electronic expansion valve with flow control precision |
-
2016
- 2016-10-12 CN CN201610889497.6A patent/CN106641430B/en active Active
-
2017
- 2017-08-23 WO PCT/CN2017/098582 patent/WO2018068585A1/en active Application Filing
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2190205Y (en) * | 1994-06-03 | 1995-02-22 | 曾祥炜 | Shutoff valve |
| JPH09196195A (en) * | 1996-01-23 | 1997-07-29 | Mitsubishi Heavy Ind Ltd | Steam govering valve |
| CN2637833Y (en) * | 2003-07-02 | 2004-09-01 | 浙江三花集团有限公司 | Electron expansion valve used for flow restriction prossure reducing and regualting flow quantity |
| JP2007010074A (en) * | 2005-07-01 | 2007-01-18 | Saginomiya Seisakusho Inc | Electromotive control valve |
| CN2846913Y (en) * | 2005-12-08 | 2006-12-13 | 浙江中宝自控元件有限公司 | Electronic expansion valve |
| CN200952570Y (en) * | 2006-09-18 | 2007-09-26 | 浙江中宝自控元件有限公司 | Electronic expansion valve |
| CN101403438A (en) * | 2008-11-10 | 2009-04-08 | 上海高迪亚电子系统有限公司 | Magnetic driving electronic expansion valve |
| JP2010112539A (en) * | 2008-11-10 | 2010-05-20 | Cci Kk | Pressure balance type control valve |
| CN103574062A (en) * | 2012-08-06 | 2014-02-12 | 珠海格力电器股份有限公司 | Electronic expansion valve |
| WO2014029348A1 (en) * | 2012-08-23 | 2014-02-27 | 丹佛斯（天津）有限公司 | Moving iron core assembly and electromagnetic valve using same |
| CN103807480A (en) * | 2012-11-12 | 2014-05-21 | 浙江盾安禾田金属有限公司 | Thermal expansion valve |
| CN102996838A (en) * | 2012-12-13 | 2013-03-27 | 浙江师范大学 | Intelligent large-flow electro-hydraulic valve |
| JP2015001257A (en) * | 2013-06-14 | 2015-01-05 | ジヤトコ株式会社 | Hydraulic control valve |
| CN103470785A (en) * | 2013-09-30 | 2013-12-25 | 苏州优冷机电科技有限公司 | Electronic expansion valve |
| CN104565401A (en) * | 2013-10-22 | 2015-04-29 | 浙江盾安人工环境股份有限公司 | Electronic expansion valve |
| JP2015098909A (en) * | 2013-11-19 | 2015-05-28 | 株式会社鷺宮製作所 | On-off valve |
| WO2015078096A1 (en) * | 2013-11-29 | 2015-06-04 | 宁波西文电器有限公司 | Two-way pressure relief valve |
| CN204403425U (en) * | 2014-12-31 | 2015-06-17 | 云南天创科技有限公司 | A kind of embolism formula liquid discharging valve |
| CN105841410A (en) * | 2015-01-13 | 2016-08-10 | 浙江三花股份有限公司 | Electronic expansion valve |
| CN104633212A (en) * | 2015-02-03 | 2015-05-20 | 诸暨市亿霸电子阀门有限公司 | Valve body for numerical control flow valve |
| CN205534555U (en) * | 2016-01-26 | 2016-08-31 | 浙江三花股份有限公司 | Electronic expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106641430A (en) | 2017-05-10 |
| WO2018068585A1 (en) | 2018-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106641430B (en) | Novel electronic expansion valve | |
| CN106090355B (en) | Flow control valve | |
| CN106678421B (en) | Electronic expansion valve with flow control precision | |
| CN103700464A (en) | Novel proportion electromagnet | |
| US2603449A (en) | Sealing means for valves | |
| CN101344185B (en) | Gas magnetic control valve | |
| CN210266036U (en) | One-way valve | |
| CN215891207U (en) | Pilot diaphragm type electromagnetic valve | |
| CN106439211B (en) | Valve rod assembly on electronic expansion valve | |
| JP5648036B2 (en) | Pilot operated solenoid valve | |
| KR20230032849A (en) | Electronic expansion valve and refrigeration system thereof | |
| CN201162842Y (en) | Totally-enclosed magnetic valve | |
| CN210318742U (en) | Zero-pressure-difference normally open electromagnetic valve | |
| CN103644316B (en) | A kind of self cooling hot-resistant valve | |
| CN215487721U (en) | Piston type pilot electromagnetic valve and piston sealing structure thereof | |
| CN209604583U (en) | A kind of gate valve | |
| CN208605644U (en) | Floating type high-performance butterfly valve | |
| CN221443338U (en) | Low resistance type flow regulating valve | |
| CN219035578U (en) | Electronic expansion valve | |
| CN205937863U (en) | Stop valve | |
| CN221257829U (en) | Sealing cover for small electromagnetic valve | |
| CN205446800U (en) | Tee bend D type solenoid valve | |
| CN210830616U (en) | Vertical one-way valve | |
| CN218992467U (en) | Axial flow type check valve with magnetic attraction | |
| CN214999766U (en) | Multistage depressurization combined regulating valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |