CN109340406A - A kind of thermostatic valve - Google Patents
A kind of thermostatic valve Download PDFInfo
- Publication number
- CN109340406A CN109340406A CN201811510234.5A CN201811510234A CN109340406A CN 109340406 A CN109340406 A CN 109340406A CN 201811510234 A CN201811510234 A CN 201811510234A CN 109340406 A CN109340406 A CN 109340406A
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- China
- Prior art keywords
- water
- hot water
- passage
- cold
- cold water
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 217
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 114
- 230000009977 dual effect Effects 0.000 claims abstract description 62
- 238000002156 mixing Methods 0.000 claims abstract description 34
- 238000007789 sealing Methods 0.000 claims description 10
- 239000000498 cooling water Substances 0.000 claims description 7
- 210000000476 body water Anatomy 0.000 claims 1
- 238000011534 incubation Methods 0.000 abstract description 2
- 102000010637 Aquaporins Human genes 0.000 description 6
- 108010063290 Aquaporins Proteins 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 108091006146 Channels Proteins 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/08—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks
- F16K11/085—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug
- F16K11/0853—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only taps or cocks with cylindrical plug having all the connecting conduits situated in a single plane perpendicular to the axis of the plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention provides a kind of thermostatic valve, including valve body and dual control valve rod, water inlet of hot water is equipped in the valve body, cold water inlet and mixing chamber, the dual control valve rod, which is equipped with, is respectively used to connection water inlet of hot water and mixing chamber, the hot water water passage and cold water water passage of cold water inlet and mixing chamber, the hot water water passage and cold water water passage are staggeredly set in dual control valve rod, the dual control valve rod is rotatably installed in valve body will pass through rotation dual control valve rod and change simultaneously hot water water passage and water inlet of hot water, the area that cold water water passage is overlapped with cold water inlet is to change the inflow of hot water and cold water.The present invention adjusts the discharge area of cold water water passage and hot water water passage simultaneously by rotation dual control valve rod to realize temperature incubation function, adjusts water temperature by axial movement piston different from traditional thermostatic valve, structure is simpler, easy to use.
Description
Technical field
The present invention relates to control valve technical fields, and in particular to a kind of thermostatic valve.
Background technique
Thermostatic valve is the mixed proportion for automatically adjusting hot and cold water, and the temperature of mixing water is enable to be automatically held in set temperature
Device.Thermostatic valve generally comprises valve body, temperature-sensitive element, piston, by moving back and forth for temperature-sensitive element temperature-sensitive control piston, regulates and controls
Hot water or cold water enters the intracorporal flow proportional of valve, to achieve the purpose that constant-temperature effluent.Existing this valve arrangement is complicated, needs sky
Axial space out, area occupied is big, and high failure rate, and production and maintenance cost are high, is unfavorable for promoting.
Summary of the invention
The purpose of the present invention is place against the above deficiency, provide it is a kind of it is simple and compact for structure, hot water can be adjusted simultaneously
The thermostatic valve of constant temperature is effectively ensured in inflow and cold water inflow.
The solution adopted by the present invention to solve the technical problem is that: a kind of thermostatic valve, including valve body and dual control valve rod, the valve
It is equipped with water inlet of hot water, cold water inlet and mixing chamber in vivo, the dual control valve rod, which is equipped with, is respectively used to connection hot water water inlet
Mouthful with the hot water water passage and cold water water passage of mixing chamber, cold water inlet and mixing chamber, the hot water water passage with
Cold water water passage is staggeredly set in dual control valve rod, and the dual control valve rod is rotatably installed in valve body will pass through rotation double control valve
Bar changes simultaneously the area that hot water water passage and water inlet of hot water, cold water water passage are overlapped with cold water inlet to change
The inflow of hot water and cold water.
Further, in order to guarantee the flexible rotating of dual control valve rod；The dual control valve rod is cylindrical-shaped structure, is set in valve body
There is the cylindrical hole for installing dual control valve rod, the mixing chamber is set to the top of cylindrical hole, the water inlet of hot water, cold water water inlet
Mouth is set to the lower section of cylindrical hole.
Further, in order to be docked with water inlet of hot water and cold water inlet；It is additionally provided in the valve body and is located at heat
Cold water water hole and hot water water hole above water water inlet and cold water inlet, the cold water water hole and hot water water hole are equal
It is connected to mixing chamber.
Further, in order to be connected to water inlet of hot water and mixing chamber, be connected to cold water inlet and mixing chamber；The hot water mistake
Aquaporin and cold water water passage are the radial hole being arranged in dual control valve rod.
Further, in order to be connected to water inlet of hot water and mixing chamber, be connected to cold water inlet and mixing chamber；The hot water mistake
Aquaporin and cold water water passage are the deep gouge on dual control valve rod periphery, and the groove depth of the deep gouge is slightly less than double control valve
The radius of bar.
The adjustment different degrees of to hot water inflow and cold water inflow when further, in order to guarantee the rotation of dual control valve rod
To guarantee that the water for blending keeps constant temperature；When the inflow of the hot water water passage is maximum inflow, the cold water
The inflow of water passage is zero, and when the inflow of the cold water water passage is maximum inflow, it is logical that the hot water crosses water
The inflow in road is zero, and when the inflow of the hot water water passage is the half of maximum inflow, it is logical that the cold water crosses water
The inflow in road is the half of maximum inflow.
Further, in order to guarantee dual control valve rod in certain rotational angle, water inlet of hot water can cover hot water and cross water
Channel, cold water inlet can cover cold water water passage；The cross-sectional area of the water inlet of hot water is greater than the hot water and crosses water
The cross-sectional area in channel, the cross-sectional area of the cold water inlet are greater than the cross-sectional area of the cold water water passage.
Further, in order to separate hot water and cold water；It is equipped on the dual control valve rod positioned at hot water water passage and cold
The first sealing ring between water water passage.
Further, in order to connect hot water inlet pipe and cold water inlet；The bottom of the valve body is equipped with water supply connector,
The water supply connector is equipped with cold water interface, the cooling water outlet being connected to cold water interface, interface of hot water and connects with interface of hot water
The cold water inlet of logical hot water outlet, the cooling water outlet and valve body connects, and the hot water of the hot water outlet and valve body is intake
Mouth connection.
Further, in order to install outlet pipe on valve body；The water chamber being connected to mixing chamber is additionally provided on the valve body.
For the prior art, the invention has the following advantages that the present invention passes through rotation dual control valve rod while adjusting cold
The discharge area of water water passage and hot water water passage is different from traditional thermostatic valve and is moved by axial to realize temperature incubation function
Piston adjusts water temperature, and structure is simpler, easy to use；Cold water water passage and hot water water passage is spatially interleaved sets
Set, when rotating dual control valve rod, only on a rotational angle inflow of hot water and the inflow of cold water be it is identical, with this
Angle rotates clockwise or counterclockwise, and the inflow of hot water and cold water can all have different and the two in inverse ratio, also, the present invention is hot
The area of water water inlet and cold water inlet is greater than the area of hot water water passage and cold water water passage, guarantees that dual control valve rod turns
Water inlet of hot water and cold water inlet can cover hot water water passage and cold water water passage when dynamic certain angle range, protect
Card water inlet.
Detailed description of the invention
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is structure sectional view of the invention；
Fig. 3 is the structure sectional view of hot water water passage；
Fig. 4 is the structure sectional view of cold water water passage；
Fig. 5 is the structural schematic diagram of the first dual control valve rod；
Fig. 6 is the structural schematic diagram of second of dual control valve rod.
In figure: 1- valve body；101- mixing chamber；102- water chamber；103- hot water water hole；104- cold water water hole；105-
Water inlet of hot water；106- cold water inlet；2- dual control valve rod；201- hot water water passage；202- cold water water passage；3- water inlet
Connector；301- interface of hot water；302- hot water outlet；303- cooling water outlet；304- cold water interface；The first sealing ring of 4-.
Specific embodiment
The content of present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification:
As shown in figures 1 to 6, it the present embodiment provides a kind of thermostatic valve, including valve body 1 and dual control valve rod 2, is set in the valve body 1
There are water inlet of hot water 105, cold water inlet 106 and mixing chamber 101, the dual control valve rod 2, which is equipped with, is respectively used to connection hot water
Water inlet 105 with mixing chamber 101, be connected to the hot water water passage 201 of cold water inlet 106 and mixing chamber 101 and cold water crosses water
Channel 202, the hot water water passage 201 and cold water water passage 202 are staggeredly set in dual control valve rod 2, are staggered here
Refer to hot water water passage 201 and cold water water passage 202 spatially without parallel relation, and hot water water passage
201 and cold water water passage 202 spatially form space angle, to realize that the rotation of dual control valve rod 2 changes simultaneously hot water and crosses water
The overlapping area of channel 201 and water inlet of hot water 105, cold water water passage 202 and cold water inlet 106 changes water inlet in turn
Amount, and when dual control valve rod 2 rotates, hot water inflow and cold water inflow are inversely proportional trend, when hot water inflow is more
Cold water inflow is few, and hot water inflow is few when cold water inflow is more；The dual control valve rod 2 is rotatably installed in valve body 1 to lead to
Cross rotation dual control valve rod 2 change simultaneously hot water water passage 201 and water inlet of hot water 105, cold water water passage 202 and cold water into
The area that the mouth of a river 106 is overlapped is to change the inflow of hot water and cold water.
In the present embodiment, in order to guarantee the flexible rotating of dual control valve rod 2；The dual control valve rod 2 is cylindrical-shaped structure, valve
The cylindrical hole for installing dual control valve rod 2 is equipped in body 1, the mixing chamber 101 is set to the top of cylindrical hole, the hot water water inlet
Mouth 105, cold water inlet 106 are set to the lower section of cylindrical hole.
In the present embodiment, in order to be docked with water inlet of hot water 105 and cold water inlet 106；It is additionally provided in the valve body 1
The cold water water hole 104 and hot water water hole 103 being located at right above water inlet of hot water 105 and cold water inlet 106, it is described
Cold water water hole 104 and hot water water hole 103 are connected to mixing chamber 101.
In the present embodiment, in order to be connected to water inlet of hot water 105 and mixing chamber 101, be connected to cold water inlet 106 with mix
Chamber 101；The hot water water passage 201 and cold water water passage 202 are the radial hole being arranged in dual control valve rod 2.
In the present embodiment, in order to be connected to water inlet of hot water 105 and mixing chamber 101, be connected to cold water inlet 106 with mix
Chamber 101；The hot water water passage 201 and cold water water passage 202 are the deep gouge on 2 periphery of dual control valve rod, institute
The groove depth for stating deep gouge is slightly less than the radius of dual control valve rod 2.
It is different degrees of to hot water inflow and cold water inflow when in the present embodiment, in order to guarantee that dual control valve rod 2 is rotated
Adjustment keep constant temperature to guarantee to blend the water come, hot water water passage 201 and cold water water passage 202 are to be staggered
, the water inlet of hot water 105 and cold water inlet 106 of valve body 1 are axially disposed on same straight line along dual control valve rod 2, and rotation is double
Valve rod 2 is controlled to adjust the angle, when the inflow of the hot water water passage 201 is maximum inflow, the cold water water passage
202 inflow is zero, and hot water water passage 201 is completely coincident with water inlet of hot water 105, cold water water passage 202 with it is cold
Water water inlet 106 is not overlapped completely；When the inflow of the cold water water passage 202 is maximum inflow, the hot water mistake
The inflow of aquaporin 201 is zero, i.e., cold water water passage 202 is completely coincident with cold water inlet 106, hot water water passage
201 are not overlapped completely with water inlet of hot water 105；When the half that the inflow of the hot water water passage 201 is maximum inflow
When, the inflow of the cold water water passage 202 is the half of maximum inflow, at this point, hot water water passage 201 have half with
Water inlet of hot water 105 is overlapped, and cold water water passage 202 has half to be overlapped with cold water inlet 106.
In the present embodiment, in order to guarantee dual control valve rod in certain rotational angle, water inlet of hot water 105 can cover heat
Water water passage 201, cold water inlet 106 can cover the cold water water passage 202；The cross of the water inlet of hot water 105
Sectional area is greater than the cross-sectional area of the hot water water passage 201, and the cross-sectional area of the cold water inlet 106 is greater than described cold
The cross-sectional area of water water passage 202.
In the present embodiment, in order to separate hot water and cold water；It is equipped on the dual control valve rod 2 positioned at hot water water passage
The first sealing ring 4 between 201 and cold water water passage 202 can also intake here in order to separate hot water and cold water in cold water
Ring sets sealing ring on mouth 105 and water inlet of hot water 106, and the outer wall sealing cooperation with dual control valve rod 2 guarantees leakproofness, in hot water mistake
Aquaporin 201 and the port ring of cold water water passage 202 set sealing ring, and the inner wall sealing cooperation with valve body 1 guarantees leakproofness；It is double
The one end for controlling valve rod 2 is set in valve body, and the other end of dual control valve rod 2 is stretched out for connecting with motor drive in valve body 1, in order to protect
The sealing installation of dual control valve rod 2 is demonstrate,proved, the outside of the dual control valve rod 2 is equipped with the second sealing ring.
In the present embodiment, in order to connect hot water inlet pipe and cold water inlet；The bottom of the valve body 1 is equipped with into water
Connector 3, cooling water outlet 303, the interface of hot water that the water supply connector 3 is equipped with cold water interface 304, is connected to cold water interface 304
301 and the hot water outlet 302 that is connected to interface of hot water 301, the cold water inlet 106 of the cooling water outlet 303 and valve body 1 connect
It connects, the hot water outlet 302 is connect with the water inlet of hot water 105 of valve body 1.
In the present embodiment, in order to install outlet pipe on valve body 1；It is additionally provided on the valve body 1 and is connected to mixing chamber 101
Water chamber 102.
The present invention controls the constant temperature work of thermostatic valve by control unit, and rotation, dual control is driven by motor in dual control valve rod 2
The rotational angle that position sensor detects dual control valve rod 2 is set on valve rod 2, temperature sensor is set in mixing chamber 101 and is detected
101 water temperature of mixing chamber, wherein motor, position sensor and temperature sensor are electrically connected with control unit, and work as temperature sensor
When detection temperature is too low, the rotation control hot water water passage 201 of motor driven dual control valve rod 2 expands and 105 weight of water inlet of hot water
The area of conjunction, synchronous, the area that cold water water passage 202 is overlapped with cold water inlet 106 can reduce, thus hot water inflow
Increase, cold water decreased influent flow, the temperature of mixing chamber 101 increases, and control unit determines motor by the feedback of temperature sensor
It stops operating or continues to rotate；When temperature sensor detects when the temperature is excessively high, the rotation of motor driven dual control valve rod 2 controls cold water
Water passage 202 expands the area being overlapped with cold water inlet 106, synchronizes, hot water water passage 201 and water inlet of hot water
105 areas being overlapped can reduce, so that cold water inflow increases, the temperature of hot water decreased influent flow, mixing chamber 101 is reduced, control
Unit processed determines that motor stalls still continue to rotate by the feedback of temperature sensor, and here, the rotation of dual control valve rod 2 is only
Beat in a certain range, repeatedly after rotation adjustment, control unit records the water temperature measured after each rotational angle, and with this
It controls thermostatic valve for basic data to keep controlling the perseverance of water temperature, use is more convenient.
The above description is only an embodiment of the present invention, is not intended to limit scope of patent protection of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of thermostatic valve, it is characterised in that: including valve body and dual control valve rod, water inlet of hot water, cold water are equipped in the valve body
Water inlet and mixing chamber, the dual control valve rod be equipped be respectively used to connection water inlet of hot water and mixing chamber, cold water inlet with
The hot water water passage and cold water water passage of mixing chamber, the hot water water passage and cold water water passage are staggeredly set to dual control
In valve rod, the dual control valve rod be rotatably installed in valve body with will pass through rotation dual control valve rod change simultaneously hot water water passage with
The area that water inlet of hot water, cold water water passage are overlapped with cold water inlet is to change the inflow of hot water and cold water.
2. thermostatic valve according to claim 1, it is characterised in that: the dual control valve rod is cylindrical-shaped structure, is set in valve body
There is the cylindrical hole for installing dual control valve rod, the mixing chamber is set to the top of cylindrical hole, the water inlet of hot water, cold water water inlet
Mouth is set to the lower section of cylindrical hole.
3. thermostatic valve according to claim 2, it is characterised in that: be additionally provided in the valve body and be located at water inlet of hot water
With the cold water water hole and hot water water hole above cold water inlet, the cold water water hole and hot water water hole are and mixing chamber
Connection.
4. thermostatic valve according to claim 3, it is characterised in that: the hot water water passage and cold water water passage are
Radial direction is arranged in the hole in dual control valve rod.
5. thermostatic valve according to claim 3, it is characterised in that: the hot water water passage and cold water water passage are
Deep gouge on dual control valve rod periphery, the groove depth of the deep gouge are slightly less than the radius of dual control valve rod.
6. thermostatic valve according to claim 4 or 5, it is characterised in that: when the inflow of the hot water water passage is most
When big inflow, the inflow of the cold water water passage is zero, when the inflow of the cold water water passage is maximum water inlet
When amount, the inflow of the hot water water passage is zero, as one that the inflow of the hot water water passage is maximum inflow
When half, the inflow of the cold water water passage is the half of maximum inflow.
7. thermostatic valve according to claim 1, it is characterised in that: the cross-sectional area of the water inlet of hot water is greater than the heat
The cross-sectional area of water water passage, the cross-sectional area of the cold water inlet are greater than the cross-sectional area of the cold water water passage.
8. thermostatic valve according to claim 1, it is characterised in that: be equipped with that cross water positioned at hot water logical on the dual control valve rod
The first sealing ring between road and cold water water passage.
9. thermostatic valve according to claim 1, it is characterised in that: the bottom of the valve body is equipped with water supply connector, described
Water supply connector is equipped with cold water interface, the cooling water outlet being connected to cold water interface, interface of hot water and is connected to interface of hot water
The cold water inlet of hot water outlet, the cooling water outlet and valve body connects, and the water inlet of hot water of the hot water outlet and valve body connects
It connects.
10. thermostatic valve according to claim 1, it is characterised in that: be additionally provided on the valve body be connected to mixing chamber go out
Water cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811510234.5A CN109340406A (en) | 2018-12-11 | 2018-12-11 | A kind of thermostatic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811510234.5A CN109340406A (en) | 2018-12-11 | 2018-12-11 | A kind of thermostatic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109340406A true CN109340406A (en) | 2019-02-15 |
Family
ID=65303331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811510234.5A Pending CN109340406A (en) | 2018-12-11 | 2018-12-11 | A kind of thermostatic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109340406A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1471295A2 (en) * | 2003-04-10 | 2004-10-27 | Hansa Metallwerke Ag | Sanitary mixing valve |
| CN2727518Y (en) * | 2004-08-31 | 2005-09-21 | 朱振连 | Electromagnetic water valve with water-mixing function |
| CN201265669Y (en) * | 2008-09-19 | 2009-07-01 | 王永进 | Thermostatic control valve |
| CN202852073U (en) * | 2012-10-17 | 2013-04-03 | 应俊 | Control valve of temperature-adjustable sensing faucet |
| CN204099709U (en) * | 2014-09-11 | 2015-01-14 | 宁波新慈立洁具有限公司 | A kind of Novel constant-temperature faucet |
| CN107559459A (en) * | 2017-09-11 | 2018-01-09 | 南宁宇立仪器有限公司 | A kind of electrical servo valve |
| CN209213085U (en) * | 2018-12-11 | 2019-08-06 | 泉州市里维斯精密五金有限公司 | A kind of thermostatic valve |
| CN209213084U (en) * | 2018-12-11 | 2019-08-06 | 泉州市里维斯精密五金有限公司 | A kind of dual control stem structure of thermostatic valve |
| CN209213075U (en) * | 2018-12-11 | 2019-08-06 | 泉州市里维斯精密五金有限公司 | A kind of dual control valve rod of thermostatic valve |
-
2018
- 2018-12-11 CN CN201811510234.5A patent/CN109340406A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1471295A2 (en) * | 2003-04-10 | 2004-10-27 | Hansa Metallwerke Ag | Sanitary mixing valve |
| CN2727518Y (en) * | 2004-08-31 | 2005-09-21 | 朱振连 | Electromagnetic water valve with water-mixing function |
| CN201265669Y (en) * | 2008-09-19 | 2009-07-01 | 王永进 | Thermostatic control valve |
| CN202852073U (en) * | 2012-10-17 | 2013-04-03 | 应俊 | Control valve of temperature-adjustable sensing faucet |
| CN204099709U (en) * | 2014-09-11 | 2015-01-14 | 宁波新慈立洁具有限公司 | A kind of Novel constant-temperature faucet |
| CN107559459A (en) * | 2017-09-11 | 2018-01-09 | 南宁宇立仪器有限公司 | A kind of electrical servo valve |
| CN209213085U (en) * | 2018-12-11 | 2019-08-06 | 泉州市里维斯精密五金有限公司 | A kind of thermostatic valve |
| CN209213084U (en) * | 2018-12-11 | 2019-08-06 | 泉州市里维斯精密五金有限公司 | A kind of dual control stem structure of thermostatic valve |
| CN209213075U (en) * | 2018-12-11 | 2019-08-06 | 泉州市里维斯精密五金有限公司 | A kind of dual control valve rod of thermostatic valve |
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