CN112524258B - Gas water heater - Google Patents
Gas water heater Download PDFInfo
- Publication number
- CN112524258B CN112524258B CN202011342631.3A CN202011342631A CN112524258B CN 112524258 B CN112524258 B CN 112524258B CN 202011342631 A CN202011342631 A CN 202011342631A CN 112524258 B CN112524258 B CN 112524258B
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- China
- Prior art keywords
- valve
- valve core
- water heater
- electromagnetic proportional
- elastic piece
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/44—Details of seats or valve members of double-seat 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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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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
- F16K31/0686—Braking, pressure equilibration, shock absorbing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a gas water heater, which comprises: an electromagnetic proportional valve and a water inlet joint; the electromagnetic proportional valve includes: a first spool movable in a first direction to open a valve opening of the electromagnetic proportional valve; the water inlet joint comprises a shell, a second valve core, a first elastic piece and a second elastic piece, wherein the second valve core is arranged in the shell, the second valve core can move towards a second direction to close a fluid passage in the shell, the first elastic piece biases the second valve core towards the second direction, and the second elastic piece biases the second valve core towards the first direction; the second valve core and the first valve core are linked in a first direction, the second elastic piece is made of memory alloy, and the elasticity of the second elastic piece is increased along with the temperature rise in a preset temperature range; the first direction is opposite to the second direction. The water inlet joint of the gas water heater can compensate the reduced valve opening degree of the electromagnetic proportional valve when the ambient temperature rises, and meanwhile, the water inlet quantity is increased.
Description
Technical Field
The invention relates to the field of domestic electric appliances, in particular to a gas water heater.
Background
The moving-coil electromagnetic proportional valve is commonly used in a gas water heater and is used for controlling the fire power regulation of the gas water heater. It has fast regulating speed and no hysteresis, but has one disadvantage: when the ambient temperature changes, the magnetism of the magnetic cylinder as the permanent magnet can fluctuate, the opening degree of the valve opened by the electromagnet is caused to change, the flame of the gas water heater is suddenly changed, and even more, the flame is extinguished, and the user experience is influenced.
Disclosure of Invention
The invention aims to overcome the defect that an electromagnetic proportional valve fluctuates greatly along with temperature change in the prior art, and provides a gas water heater.
The invention solves the technical problems through the following technical scheme:
a gas water heater, comprising: an electromagnetic proportional valve and a water inlet joint;
the electromagnetic proportional valve comprises: a first spool movable in a first direction to open a valve opening of the electromagnetic proportional valve;
the water inlet joint comprises a shell, a second valve core arranged in the shell, a first elastic piece and a second elastic piece, wherein the second valve core can move towards a second direction to close a fluid passage in the shell, the first elastic piece biases the second valve core towards the second direction, and the second elastic piece biases the second valve core towards the first direction;
the second valve core and the first valve core are linked in the first direction, the second elastic piece is made of memory alloy, and the elastic force of the second elastic piece is increased along with the increase of the temperature in a preset temperature range;
the first direction is opposite to the second direction.
Preferably, the water inlet joint is arranged below the electromagnetic proportional valve, a through hole is formed in the top of the shell, and the second valve core penetrates through the through hole in a liquid-tight manner to be connected with the first valve core.
Preferably, the electromagnetic proportional valve further comprises an electromagnetic mechanism, the electromagnetic mechanism comprises a coil and magnetic steel, the coil is connected to the first valve core, and the lower end of the first valve core is connected with the second valve core through a third elastic piece.
Preferably, an annular groove which is opened upwards is formed in the magnetic steel, and the coil is arranged in the annular groove.
Preferably, the electromagnetic proportional valve further comprises a housing part, and a skin membrane is arranged in the housing part;
first case include the valve plug with connect in the valve rod of valve plug, the valve plug is used for the switching the valve opening, the valve rod passes through to locate with the gas tightness the involucra, the valve plug connect in the top of valve rod, the second case connect in the valve rod below.
Preferably, the electromagnetic proportional valve further comprises a housing part, and a skin membrane is arranged in the housing part;
the first valve core comprises a valve plug and a valve rod connected with the valve plug, the valve plug is used for opening and closing the valve opening, the valve rod penetrates through the rubber membrane in an airtight mode, the valve plug is connected above the valve rod, and the second valve core is connected below the valve rod;
the electromagnetic proportional valve further comprises a coil frame, wherein the coil is wound on the coil frame, and the coil frame is connected to the lower portion of the valve rod through a fourth elastic piece.
Preferably, the involucra will the inner chamber gas tightness ground of shell portion is separated for gas chamber and electromagnetic cavity, the valve opening is located in the gas chamber, the gas chamber is used for circulating the gas, the electromagnetic cavity is used for setting up electromagnetic mechanism.
Preferably, the valve plug has tubaeform elasticity wall, be equipped with annular disk seat in the shell portion, the valve opening does the central opening of disk seat, the elasticity wall is used for the butt the disk seat.
Preferably, the coil frame top is equipped with the holding tank, the fourth elastic component is located in the holding tank.
Preferably, the second elastic member is a spring.
The positive progress effects of the invention are as follows: this gas heater's water supply connector can be according to the temperature regulation inflow of intaking, and the linkage of the second case through water supply connector and the first case of electromagnetism proportional valve on the first direction, when ambient temperature rose, the magnetic force of electromagnetism proportional valve weakens, the valve opening of electromagnetism proportional valve reduces, and because the elasticity of second elastic component rises and drives first case and rise, thereby the valve opening that the electromagnetism proportional valve reduced has been compensated, and simultaneously, when ambient temperature rose, water supply connector makes water supply connector's the inflow water yield increase because the elasticity of second elastic component rises, thereby can satisfy the operation requirement when weather is hot.
Drawings
Fig. 1 is a schematic structural view of a gas water heater according to an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic structural view of a water inlet joint according to an embodiment of the present invention.
Description of reference numerals:
Electromagnetic proportional valve 101
Valve seat 106
Valve opening 107
Valve plug 113
Valve stem 117
Coil former 121
Accommodating groove 123
Through hole 135
First elastic member 141
Second elastic member 142
Third elastic member 143
Fourth elastic member 144
Detailed Description
The present invention is further illustrated by way of example and not by way of limitation in the scope of the embodiments described below in conjunction with the accompanying drawings.
As shown in fig. 1 to 3, the gas water heater 100 includes: an electromagnetic proportional valve 101 and a water inlet joint 131.
The electromagnetic proportional valve 101 further includes a housing portion 103 and a first spool 111 inside the housing portion 103. A skin 105 is provided in the housing portion 103. The membrane 105 hermetically divides the inner cavity of the housing part 103 into a gas chamber 108 and an electromagnetic chamber 109, the gas chamber 108 being used for the gas to flow through the electromagnetic chamber 109 for providing an electromagnetic mechanism. An annular valve seat 106 is arranged in the gas chamber 108, and a valve opening 107 is formed in the center opening of the valve seat 106.
The first spool 111 is movable toward the upper direction (first direction) to open the valve opening 107 of the electromagnetic proportional valve 101.
The first valve body 111 includes a valve plug 113 and a valve stem 117 connected to the valve plug 113, the valve plug 113 opens and closes the valve opening 107, the valve stem 117 is air-tightly inserted through the film 105, and the valve plug 113 is connected above the valve stem 117. The plug 113 has a flared resilient wall 115, the resilient wall 115 being adapted to abut the valve seat 106.
The electromagnetic proportional valve 101 further includes an electromagnetic mechanism, the electromagnetic mechanism includes a coil (not shown) and a magnetic steel 125, the coil is connected to the first valve core 111, and a lower end of the first valve core 111 is connected to a second valve core 137 of a water inlet joint 131 described below through a third elastic member 143.
An annular groove 127 which is opened upwards is arranged in the magnetic steel 125, and the coil is arranged in the annular groove 127.
The electromagnetic proportional valve 101 further includes a bobbin 121, a coil being wound on the bobbin 121, the bobbin 121 being connected to a lower portion of the valve stem 117 by a fourth elastic member 144. The coil frame 121 has a receiving groove 123 at the top, and the fourth elastic element 144 is disposed in the receiving groove 123.
By providing the third elastic member 143 and the fourth elastic member 144 in the electromagnetic proportional valve 101, elastic connection of the first spool 111 and the second spool 137 is achieved to form a cushion when the first spool 111 falls. Of course, alternatively, the first valve spool 111 and the second valve spool 137 may be rigidly connected.
Although not shown in the drawings, a fifth elastic member is disposed above the valve plug 113, and biases the valve plug 113 downward (in the second direction) so that the valve plug 113 abuts against the valve seat 106 when the electromagnetic mechanism is not energized, thereby ensuring that the electromagnetic proportional valve 101 is normally closed.
As shown in fig. 3, the water inlet joint 131 includes a housing 133, a second valve body 137 provided in the housing 133, a first elastic member 141, and a second elastic member 142, the second valve body 137 being movable downward to close the fluid passage 136 in the housing 133, the first elastic member 141 biasing the second valve body 137 downward, and the second elastic member 142 biasing the second valve body 137 upward.
The second spool 137 is interlocked with the first spool 111 in the first direction, the second elastic member 142 is made of a memory alloy, and the elastic force of the second elastic member 142 increases as the temperature increases within a predetermined temperature range.
The second elastic member 142 is made of a memory alloy material, which may be Au-Cd, Ag-Cd, Cu-Zn-Al, Cu-Zn-Sn, Cu-Zn-Si, Cu-Sn, Cu-Zn-Ga, In-Ti, Au-Cu-Zn, NiAl, Fe-Pt, Ti-Ni-Pd, Ti-Nb, U-Nb, Fe-Mn-Si, etc., and the memory alloy material that can recover deformation at a specific environmental temperature (e.g., 35 ℃ to 40 ℃) is selected.
The water inlet joint 131 is arranged below the electromagnetic proportional valve 101, a through hole 135 is arranged at the top of the shell 133, and the second valve core 137 passes through the through hole 135 in a liquid-tight manner and is connected with the first valve core 111.
The valve opening degree of the water inlet joint 131 increases as the distance that the second spool 137 moves upward increases.
In the present embodiment, the first elastic element 141, the second elastic element 142, the third elastic element 143, the fourth elastic element 144 and the fifth elastic element are all springs and are in a compressed state. Of course, the present invention is not limited thereto, and those skilled in the art may adopt other existing elastic members as needed.
The water inlet connector 131 of the gas water heater 100 can adjust the water inlet amount according to the temperature of inlet water, and through the linkage of the second valve core 137 of the water inlet connector 131 and the first valve core 111 of the electromagnetic proportional valve 101 in the first direction, when the ambient temperature rises, because the magnetism of the magnetic steel 125 is influenced by the temperature, the magnetic force of the electromagnetic proportional valve 101 is weakened, so that the upward thrust on the valve core is weakened, the valve opening degree of the electromagnetic proportional valve 101 is reduced, and because the second elastic member 142 is influenced by the temperature, the elastic force rises to drive the second valve core 137 to rise, the second valve core 137 pushes the first valve core 111, so that the first valve core 111 rises, the valve opening degree of the electromagnetic proportional valve 101 is increased, so as to compensate the reduced valve opening degree of the electromagnetic proportional valve 101, meanwhile, when the ambient temperature rises, the firepower required for the same water inlet amount to reach the preset temperature is reduced, and the water inlet amount of the water inlet connector 131 is increased due to the elastic force of the second elastic member 142, the instantaneous overhigh water outlet temperature caused by untimely fire adjustment is avoided.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A gas water heater, characterized in that it comprises: an electromagnetic proportional valve and a water inlet joint;
the electromagnetic proportional valve comprises: a first spool movable in a first direction to open a valve opening of the electromagnetic proportional valve;
the water inlet joint comprises a shell, a second valve core arranged in the shell, a first elastic piece and a second elastic piece, wherein the second valve core can move towards a second direction to close a fluid passage in the shell, the first elastic piece biases the second valve core towards the second direction, and the second elastic piece biases the second valve core towards the first direction;
the second valve core and the first valve core are linked in the first direction, the second elastic piece is made of memory alloy, and the elastic force of the second elastic piece is increased along with the increase of the temperature in a preset temperature range, so that the second elastic piece drives the second valve core to move towards the first direction to compensate the reduced valve opening degree of the electromagnetic proportional valve under the influence of the temperature;
the first direction is opposite to the second direction.
2. The gas water heater of claim 1, wherein said water inlet connector is disposed below said electromagnetic proportional valve, a through hole is disposed at the top of said housing, and said second valve core is connected to said first valve core through said through hole in a fluid-tight manner.
3. The gas water heater of claim 2, wherein the electromagnetic proportional valve further comprises an electromagnetic mechanism, the electromagnetic mechanism comprises a coil and a magnetic steel, the coil is connected to the first valve core, and the lower end of the first valve core is connected to the second valve core through a third elastic element.
4. The gas water heater of claim 3, wherein said magnetic steel has an upwardly open annular recess therein, and said coil is disposed in said annular recess.
5. The gas water heater of claim 1, wherein said electromagnetic proportional valve further comprises a housing portion, said housing portion having a membrane disposed therein;
first case include the valve plug with connect in the valve rod of valve plug, the valve plug is used for the switching the valve opening, the valve rod passes through to locate with the gas tightness the involucra, the valve plug connect in the top of valve rod, the second case connect in the valve rod below.
6. The gas water heater of claim 3, wherein said electromagnetic proportional valve further comprises a housing portion, said housing portion having a membrane disposed therein;
the first valve core comprises a valve plug and a valve rod connected with the valve plug, the valve plug is used for opening and closing the valve opening, the valve rod penetrates through the rubber membrane in an airtight mode, the valve plug is connected above the valve rod, and the second valve core is connected below the valve rod;
the electromagnetic proportional valve further comprises a coil frame, wherein the coil is wound on the coil frame, and the coil frame is connected to the lower portion of the valve rod through a fourth elastic piece.
7. The gas water heater of claim 5, wherein the membrane hermetically separates the inner cavity of the housing portion into a gas chamber and an electromagnetic chamber, the valve opening being disposed in the gas chamber, the gas chamber being for gas flow therethrough, the electromagnetic chamber being for disposing an electromagnetic mechanism.
8. The gas water heater of claim 5, wherein said valve plug has a flared resilient wall, and an annular valve seat is disposed within said housing portion, said valve opening being a central opening of said valve seat, said resilient wall being adapted to abut said valve seat.
9. The gas water heater of claim 6, wherein a receiving groove is formed in the top of the coil frame, and the fourth elastic member is disposed in the receiving groove.
10. The gas water heater of claim 1, wherein said second resilient member is a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011342631.3A CN112524258B (en) | 2020-11-25 | 2020-11-25 | Gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011342631.3A CN112524258B (en) | 2020-11-25 | 2020-11-25 | Gas water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112524258A CN112524258A (en) | 2021-03-19 |
| CN112524258B true CN112524258B (en) | 2022-03-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011342631.3A Active CN112524258B (en) | 2020-11-25 | 2020-11-25 | Gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112524258B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112524258B (en) * | 2020-11-25 | 2022-03-01 | 宁波方太厨具有限公司 | Gas water heater |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2552848A1 (en) * | 1983-09-30 | 1985-04-05 | Sdecc | Hydraulic device ensuring the abrupt opening and closing of an inlet shutter for gas to a burner of an instantaneous gas bath heater or water heater |
| EP0172113A2 (en) * | 1984-08-16 | 1986-02-19 | Saunier Duval Eau Chaude Chauffage - Sdecc | Water flow regulator for a gas-water heater adjustable by a control mechanism with a differential membrane |
| CN204201208U (en) * | 2014-11-04 | 2015-03-11 | 广州市红日燃具有限公司 | A kind of water yield flow automatic regulation sensor and constant temp gas water heater |
| CN206943493U (en) * | 2017-05-31 | 2018-01-30 | 芜湖美的厨卫电器制造有限公司 | Thermostatic valve and there is its gas heater |
| CN107850224A (en) * | 2015-08-03 | 2018-03-27 | 株式会社电装 | Pile-up valve |
| CN111140690A (en) * | 2018-11-05 | 2020-05-12 | 宁波方太厨具有限公司 | Gas proportional valve, gas water heater and control method of gas water heater |
| CN112524258A (en) * | 2020-11-25 | 2021-03-19 | 宁波方太厨具有限公司 | Gas water heater |
-
2020
- 2020-11-25 CN CN202011342631.3A patent/CN112524258B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2552848A1 (en) * | 1983-09-30 | 1985-04-05 | Sdecc | Hydraulic device ensuring the abrupt opening and closing of an inlet shutter for gas to a burner of an instantaneous gas bath heater or water heater |
| EP0172113A2 (en) * | 1984-08-16 | 1986-02-19 | Saunier Duval Eau Chaude Chauffage - Sdecc | Water flow regulator for a gas-water heater adjustable by a control mechanism with a differential membrane |
| CN204201208U (en) * | 2014-11-04 | 2015-03-11 | 广州市红日燃具有限公司 | A kind of water yield flow automatic regulation sensor and constant temp gas water heater |
| CN107850224A (en) * | 2015-08-03 | 2018-03-27 | 株式会社电装 | Pile-up valve |
| CN206943493U (en) * | 2017-05-31 | 2018-01-30 | 芜湖美的厨卫电器制造有限公司 | Thermostatic valve and there is its gas heater |
| CN111140690A (en) * | 2018-11-05 | 2020-05-12 | 宁波方太厨具有限公司 | Gas proportional valve, gas water heater and control method of gas water heater |
| CN112524258A (en) * | 2020-11-25 | 2021-03-19 | 宁波方太厨具有限公司 | Gas water heater |
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| Publication number | Publication date |
|---|---|
| CN112524258A (en) | 2021-03-19 |
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