CN110173581B - Small-size multichannel flow integrative valve - Google Patents
Small-size multichannel flow integrative valve Download PDFInfo
- Publication number
- CN110173581B CN110173581B CN201910543256.XA CN201910543256A CN110173581B CN 110173581 B CN110173581 B CN 110173581B CN 201910543256 A CN201910543256 A CN 201910543256A CN 110173581 B CN110173581 B CN 110173581B
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- Prior art keywords
- valve
- flow
- impeller
- water inlet
- water outlet
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 96
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000005187 foaming Methods 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 description 6
- 108091006146 Channels Proteins 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 102000010637 Aquaporins Human genes 0.000 description 1
- 108010063290 Aquaporins Proteins 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and 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
- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/20—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow
- G01F1/28—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by detection of dynamic effects of the flow by drag-force, e.g. vane type or impact flowmeter
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a small-sized multi-flow-passage flow integrated valve, which comprises a multi-flow-passage sensor, a water inlet pipe, a second-level low-power electromagnetic valve and a water outlet pipe, wherein a check device is arranged between the water outlet end of the multi-flow-passage sensor and the water inlet end of the second-level low-power electromagnetic valve; the secondary low-power electromagnetic valve comprises a valve body, an end cap, a front diaphragm, a return spring, a valve cover, a combined coil, an iron core and a lining; the check device comprises a locating sleeve, a check diaphragm, a check spring, a check disc and a locating shaft. The invention can prevent water from flowing out of the impeller gap under low water pressure without charging, has stable switch, no delay, low power, low temperature rise and long service life of the product, and the check device is arranged between the flow sensor and the electromagnetic valve to prevent water theft, and has accurate charging and low use cost.
Description
Technical Field
The invention relates to a valve structure, in particular to a small multi-flow-passage flow integrated valve.
Background
The flow integrated valve combines a flow sensor and an electromagnetic valve, and has the following defects in the current market: 1. the flow sensor of the flow integrated valve has the advantages that due to the structural problem of the flow channel, water easily flows out from the clearance of the impeller under low water pressure, so that billing is not performed, and billing is inaccurate; 2. the check device of the flow integrated valve is usually arranged at the rear end of the electromagnetic valve, so that the check device is easy to damage or even remove, and the check device is inverted and is not charged; 3. the electromagnetic valve of the flow integrated valve is usually a primary electromagnetic valve, and only one action directly pushes up the diaphragm, so that the consumed power is higher, and the use cost is increased.
Disclosure of Invention
The invention aims to solve the defects and shortcomings in the prior art, and provides a small multi-flow-channel flow integrated valve which has the advantages that water flows in from the lower side, passes through an impeller and then flows out from the upper side, all the flowing water is required to pass through the impeller to drive the impeller to rotate and output signals, the water is prevented from flowing out from an impeller gap under low water pressure and is not charged, a two-stage low-power electromagnetic valve structure is adopted, the switch is stable, no delay exists, the power of a product is low during working, the temperature rise is low, the service life of the product is long, a non-return device is arranged between a flow sensor and the electromagnetic valve, the non-return device cannot be taken out, the phenomenon of water theft is prevented, and therefore, the charging is accurate, and the use cost is low.
The technical scheme of the invention is as follows: a small-sized multi-flow-passage flow integrated valve, which comprises a multi-flow-passage sensor, a water inlet pipe connected with the water inlet end of the multi-flow-passage sensor, a secondary low-power electromagnetic valve connected with the water outlet end of the multi-flow-passage sensor, and a water outlet pipe connected with the water outlet end of the secondary low-power electromagnetic valve, wherein a non-return device is arranged between the water outlet end of the multi-flow-passage sensor and the water inlet end of the secondary low-power electromagnetic valve,
the multi-flow-passage sensor comprises a shell, a foaming net sleeve, an impeller seat, an impeller, a permanent magnet, a first O-shaped ring and a top cover, wherein the foaming net sleeve, the impeller seat, the impeller, the permanent magnet and the first O-shaped ring are arranged in the shell, the top cover is arranged at the top of the shell, the water inlet end of the multi-flow-passage sensor is lower than the water outlet end of the multi-flow-passage sensor, and a rotating speed balancing hole is formed in the bottom of the impeller seat;
the secondary low-power electromagnetic valve comprises a valve body, an end cap, a front diaphragm, a reset spring, a valve cover, a combined coil, an iron core and a lining, wherein the end cap, the front diaphragm, the reset spring, the valve cover and the combined coil, the iron core and the lining are arranged in the valve body, the combined coil, the iron core and the lining are arranged on the valve cover, the hollow pressure relief column matched with the iron core is arranged on the valve cover, the lower end of the hollow pressure relief column penetrates through the front diaphragm and then is inserted into the end cap, and the middle part of the end cap is connected with the middle part of the hollow pressure relief column to form a pressure relief channel;
the check device comprises a locating sleeve, a check diaphragm, a check spring and a check disc which are arranged in the locating sleeve, and a locating shaft which is used for locating the check diaphragm and the check disc in the locating sleeve.
The invention has the advantages that water enters from the lower side and flows out from the upper side after passing through the impeller, all the water flowing out must pass through the impeller to drive the impeller to rotate and output signals, so that the water is prevented from flowing out from the gap of the impeller under low water pressure without charging.
Preferably, the water outlet end of the multi-channel sensor is provided with a connecting sleeve, the non-return device is arranged in the connecting sleeve, the water inlet end of the secondary low-power electromagnetic valve is provided with a connector matched with the connecting sleeve, the connecting sleeve and the connector are clamped by a positioning buckle, and at least one second O-shaped ring is arranged between the connecting sleeve and the connector.
The structure ensures firm and reliable assembly of the multi-channel sensor and the secondary low-power electromagnetic valve, and ensures firm and reliable installation of the check device.
Preferably, the lower end of the impeller is connected to the impeller seat through a lower stainless steel shaft and a positioning column, the upper end of the impeller is connected to the top cover through an upper stainless steel shaft, and the permanent magnet is sleeved at the upper end of the impeller.
The structure ensures the stable and reliable installation of the impeller, thereby ensuring the stable and reliable action of the impeller.
Preferably, a third O-shaped ring is arranged between the positioning sleeve and the connecting sleeve, a fourth O-shaped ring is arranged between the water inlet end of the multi-channel sensor and the water inlet pipe, and a fifth O-shaped ring is arranged between the water outlet end of the secondary low-power electromagnetic valve and the water outlet pipe.
The structure ensures the sealing effect between the positioning sleeve and the connecting sleeve, ensures the sealing effect between the water inlet end of the multi-channel sensor and the water inlet pipe, and ensures the sealing effect between the water outlet end of the secondary low-power electromagnetic valve and the water outlet pipe.
Preferably, the water inlet pipe and the water outlet pipe are copper pipe fittings, and the water inlet pipe is provided with a filter screen.
The structure ensures the stability and reliability of the inlet water and the outlet water, and can properly filter the inlet water.
The invention has the advantages that water enters from the lower side and flows out from the upper side after passing through the impeller, all the water flowing out must pass through the impeller to drive the impeller to rotate and output signals, so that the water is prevented from flowing out from the gap of the impeller under low water pressure without charging.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a schematic illustration of the present invention in cross-section;
in the figure, 1, 2, a foaming net sleeve, 3, an impeller seat, 4, a lower stainless steel shaft, 5, a positioning column, 6, an impeller, 7, a permanent magnet, 8, an upper stainless steel shaft, 9, a first O-ring, 10, a top cover, 11, a water inlet pipe, 12, a fourth O-ring, 13, a water outlet pipe, 14, a filter screen, 15, a positioning buckle, 16, a positioning sleeve, 17, a check diaphragm, 18, a check disc, 19, a positioning shaft, 20, a valve body, 21, an end cap, 22, a front diaphragm, 23, a return spring, 24, a valve cover, 25, a lining, 26, an iron core, 27, a combined coil, 28, a second O-ring, 29, a third O-ring, 30, a fifth O-ring, 31, a hollow pressure relief column, 32, a pressure relief channel, 33, a connecting sleeve, 34, a connector and 35.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, without limiting the scope of the invention.
As shown in fig. 1 and 2, a small-sized multi-flow integrated valve comprises a multi-flow sensor, a water inlet pipe 11 connected with the water inlet end of the multi-flow sensor, a secondary low-power electromagnetic valve connected with the water outlet end of the multi-flow sensor, and a water outlet pipe 13 connected with the water outlet end of the secondary low-power electromagnetic valve, wherein a non-return device is arranged between the water outlet end of the multi-flow sensor and the water inlet end of the secondary low-power electromagnetic valve,
the multi-channel sensor comprises a shell 1, a foaming net sleeve 2, an impeller seat 3, an impeller 6, a permanent magnet 7, a first O-shaped ring 9 and a top cover 10 arranged at the top of the shell 1, wherein the height of a water inlet end of the multi-channel sensor is lower than that of a water outlet end of the multi-channel sensor, and a rotating speed balancing hole is formed in the bottom of the impeller seat;
the secondary low-power electromagnetic valve comprises a valve body 20, an end cap 21, a front diaphragm 22, a return spring 23, a valve cover 24, a combined coil 27, an iron core 26 and a lining 25, wherein the end cap 21, the front diaphragm 22, the return spring 23 and the valve cover 24 are arranged in the valve body 20, the combined coil 27, the iron core 26 and the lining 25 are arranged on the valve cover 24, a hollow pressure relief column 31 matched with the iron core 26 is arranged on the valve cover 24, the lower end of the hollow pressure relief column 31 penetrates through the front diaphragm 22 and then is inserted into the end cap 21, and the middle part of the end cap 21 is connected with the middle part of the hollow pressure relief column 31 to form a pressure relief channel 32;
the check device includes a positioning sleeve 16, a check diaphragm 17, a check spring 35 and a check disk 18 mounted within the positioning sleeve 16, and a positioning shaft 19 that positions the check diaphragm 16 and the check disk 17 within the positioning sleeve 16.
The water outlet end of the multi-flow channel sensor is provided with a connecting sleeve 33, the non-return device is arranged in the connecting sleeve 33, the water inlet end of the secondary low-power electromagnetic valve is provided with a connector 34 matched with the connecting sleeve 33, the connecting sleeve 33 and the connector 34 are clamped through a positioning buckle 15, and two second O-shaped rings 28 are arranged between the connecting sleeve 33 and the connector 34.
The lower extreme of impeller 6 passes through lower stainless steel axle 4 and reference column 5 to be connected on impeller seat 3, and the upper end of impeller 6 passes through upper stainless steel axle 8 to be connected on top cap 10, and permanent magnet 7 cover is in the upper end of impeller 6.
A third O-shaped ring 29 is arranged between the positioning sleeve 16 and the connecting sleeve 33, a fourth O-shaped ring 12 is arranged between the water inlet end of the multi-channel sensor and the water inlet pipe 11, and a fifth O-shaped ring 30 is arranged between the water outlet end of the secondary low-power electromagnetic valve and the water outlet pipe 13.
The water inlet pipe 11 and the water outlet pipe 13 are copper pipe fittings, and a filter screen 14 is arranged on the water inlet pipe 11.
The product of the invention is composed of three parts of a multi-flow passage sensor, a check device and a secondary low-power electromagnetic valve. The product is designed aiming at the problems of inaccurate charging, inverse charging, and over-high power consumption of the flow integrated valve in the current market.
The invention adopts a structure that a plurality of water holes on the foaming net sleeve and the impeller seat are matched with impellers to rotate to form a plurality of flow passages.
The principle of the secondary low-power electromagnetic valve in the invention is as follows: after the combined coil is electrified, the iron core and the lining are sucked, a primary valve port (the primary valve port is sealed by the lining) between the bottom of the iron core and the top of the hollow pressure relief column is opened, pressure is relieved from a pressure relief channel, pressure difference is formed after pressure relief, the lower side pressure of the front diaphragm is large, the front diaphragm is upwards jacked, and a secondary valve port (a main valve port) between the front diaphragm and the valve body is opened, so that the valve is opened. Therefore, the iron core and the lining are firstly sucked by adopting relatively small power to open the primary valve port, and the secondary valve port can be opened by pressure difference obtained by pressure relief.
The product of the invention has the following advantages:
1. the flow sensor adopts a multi-runner design, and the height of the water inlet end is lower than that of the water outlet end, so that water enters from the lower side and flows out from the upper side after passing through the impeller. All the water flowing out must pass through the impeller to drive the impeller to rotate and output signals. Preventing water from flowing out at the impeller gap without billing at low water pressure.
2. Because the product uses the multi-channel design and is optimized in structure, the valve can charge as low as 500 milliliters per minute, and the accuracy range is +/-5 percent.
3. The solenoid valve part adopts a low-power two-stage valve structure. The switch is stable and has no time delay. The product has low power, low temperature rise and long service life when in work.
4. The check device is designed between the flow sensor and the electromagnetic valve, and cannot be taken out, so that water theft is prevented.
5. The flow sensor and the electromagnetic valve part are axially sealed and are connected by a positioning buckle type bolt, so that the flow sensor is convenient to operate and can be installed at any angle in a rotating way.
6. The product adopts axial sealing in all sealing modes, and has stable and reliable sealing performance.
7. The main body parts of the flow sensor and the electromagnetic valve are made of high-low temperature resistant rigid plastic, and compared with copper materials, the material is free from oxidation and low in processing cost.
The invention has the advantages that water enters from the lower side and flows out from the upper side after passing through the impeller, all the water flowing out must pass through the impeller to drive the impeller to rotate and output signals, so that the water is prevented from flowing out from the gap of the impeller under low water pressure without charging.
Claims (5)
1. A small-size multichannel flow integrative valve, its characterized in that: which comprises a multi-flow passage sensor, a water inlet pipe connected with the water inlet end of the multi-flow passage sensor, a second-level low-power electromagnetic valve connected with the water outlet end of the multi-flow passage sensor, and a water outlet pipe connected with the water outlet end of the second-level low-power electromagnetic valve, wherein a non-return device is arranged between the water outlet end of the multi-flow passage sensor and the water inlet end of the second-level low-power electromagnetic valve,
the multi-flow-passage sensor comprises a shell, a foaming net sleeve, an impeller seat, an impeller, a permanent magnet, a first O-shaped ring and a top cover, wherein the foaming net sleeve, the impeller seat, the impeller, the permanent magnet and the first O-shaped ring are arranged in the shell, the top cover is arranged at the top of the shell, the water inlet end of the multi-flow-passage sensor is lower than the water outlet end of the multi-flow-passage sensor, and a rotating speed balancing hole is formed in the bottom of the impeller seat;
the secondary low-power electromagnetic valve comprises a valve body, an end cap, a front diaphragm, a reset spring, a valve cover, a combined coil, an iron core and a lining, wherein the end cap, the front diaphragm, the reset spring, the valve cover and the combined coil, the iron core and the lining are arranged in the valve body, the combined coil, the iron core and the lining are arranged on the valve cover, the hollow pressure relief column matched with the iron core is arranged on the valve cover, the lower end of the hollow pressure relief column penetrates through the front diaphragm and then is inserted into the end cap, and the middle part of the end cap is connected with the middle part of the hollow pressure relief column to form a pressure relief channel;
the check device comprises a locating sleeve, a check diaphragm, a check spring and a check disc which are arranged in the locating sleeve, and a locating shaft which is used for locating the check diaphragm and the check disc in the locating sleeve.
2. A compact multi-flow integral valve as defined in claim 1, wherein: the water outlet end of the multi-channel sensor is provided with a connecting sleeve, the non-return device is arranged in the connecting sleeve, the water inlet end of the secondary low-power electromagnetic valve is provided with a connector matched with the connecting sleeve, the connecting sleeve and the connector are clamped by a positioning buckle, and at least one second O-shaped ring is arranged between the connecting sleeve and the connector.
3. A compact multi-flow integral valve as defined in claim 1, wherein: the lower end of the impeller is connected to the impeller seat through a lower stainless steel shaft and a positioning column, the upper end of the impeller is connected to the top cover through an upper stainless steel shaft, and the permanent magnet is sleeved at the upper end of the impeller.
4. A compact multi-flow integral valve as defined in claim 2, wherein: a third O-shaped ring is arranged between the positioning sleeve and the connecting sleeve, a fourth O-shaped ring is arranged between the water inlet end of the multi-channel sensor and the water inlet pipe, and a fifth O-shaped ring is arranged between the water outlet end of the secondary low-power electromagnetic valve and the water outlet pipe.
5. A compact multi-flow integral valve as defined in claim 1, wherein: the water inlet pipe and the water outlet pipe are copper pipe fittings, and a filter screen is arranged on the water inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543256.XA CN110173581B (en) | 2019-06-21 | 2019-06-21 | Small-size multichannel flow integrative valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910543256.XA CN110173581B (en) | 2019-06-21 | 2019-06-21 | Small-size multichannel flow integrative valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110173581A CN110173581A (en) | 2019-08-27 |
| CN110173581B true CN110173581B (en) | 2024-03-26 |
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ID=67698696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910543256.XA Active CN110173581B (en) | 2019-06-21 | 2019-06-21 | Small-size multichannel flow integrative valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN110173581B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935368B (en) * | 2022-06-10 | 2024-05-28 | 陕西秦北检验检测有限公司 | Storage tank annex pressure flow detection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630642A (en) * | 1984-12-03 | 1986-12-23 | Tom Mcguane Industries, Inc. | Check valve and water injection systems and fuel systems utilizing the same |
| CN102209671A (en) * | 2008-09-10 | 2011-10-05 | 艾科雷博克斯公司 | Reusable shipping and packing materials and method of use |
| CN104132172A (en) * | 2014-07-16 | 2014-11-05 | 李云生 | Automatic water valve closing device |
| CN108591589A (en) * | 2018-04-24 | 2018-09-28 | 宁波大叶园林工业有限公司 | Flow adjustable type timer |
| CN210240677U (en) * | 2019-06-21 | 2020-04-03 | 杭州湘君电子有限公司 | Small-size multi-runner flow integrated valve |
-
2019
- 2019-06-21 CN CN201910543256.XA patent/CN110173581B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4630642A (en) * | 1984-12-03 | 1986-12-23 | Tom Mcguane Industries, Inc. | Check valve and water injection systems and fuel systems utilizing the same |
| CN102209671A (en) * | 2008-09-10 | 2011-10-05 | 艾科雷博克斯公司 | Reusable shipping and packing materials and method of use |
| CN104132172A (en) * | 2014-07-16 | 2014-11-05 | 李云生 | Automatic water valve closing device |
| CN108591589A (en) * | 2018-04-24 | 2018-09-28 | 宁波大叶园林工业有限公司 | Flow adjustable type timer |
| CN210240677U (en) * | 2019-06-21 | 2020-04-03 | 杭州湘君电子有限公司 | Small-size multi-runner flow integrated valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110173581A (en) | 2019-08-27 |
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