CN112833538A - Pressure regulating valve and water heater - Google Patents
Pressure regulating valve and water heater Download PDFInfo
- Publication number
- CN112833538A CN112833538A CN202110145500.4A CN202110145500A CN112833538A CN 112833538 A CN112833538 A CN 112833538A CN 202110145500 A CN202110145500 A CN 202110145500A CN 112833538 A CN112833538 A CN 112833538A
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- Prior art keywords
- pressure
- water heater
- valve
- regulating valve
- valve body
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Classifications
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/048—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded combined with other safety valves, or with pressure control devices
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
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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
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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
- F24H9/12—Arrangements for connecting heaters to circulation pipes
- F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
- F24H9/133—Storage heaters
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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
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a pressure regulating valve and a water heater, wherein the pressure regulating valve comprises a valve body and a valve core, the inner wall of the valve body, which is close to an inlet, is radially extended to be provided with an annular lug, a mounting seat is arranged close to an outlet, the valve core is positioned between the annular lug and the mounting seat, one end, which is used for plugging the gap of the annular lug, of the valve core extends outwards and is radially provided with an annular boss, a pressurizing spring is arranged between the annular lug and the mounting seat, the valve core comprises a shell with an internal hollow structure, the shell is provided with a pressure relief hole which is communicated with the inlet of the valve body and is plugged by a sealing plate in the shell, a safety spring is arranged; the elasticity of the pressurizing spring is smaller than that of the safety spring. The pressure regulating valve is used for increasing the air pressure value in the inner container of the water heater, so that the boiling point temperature of water in the water heater is increased, the hot water yield of the water heater is ensured, and the water heater is simple in structure and particularly suitable for high-altitude areas.
Description
Technical Field
The invention belongs to the field of electric water heaters, and particularly relates to a pressure regulating valve and a water heater.
Background
The water heater is generally designed to be used in plain areas with low altitude, and because the water heater in the prior art cannot ensure the internal pressure of the inner container, when the water heater is applied to high altitude areas, the boiling point of water begins to be reduced along with the increase of the altitude of the use areas, so that the actual temperature of the water heater during heat preservation cannot meet the design requirement. For example, in a water heater in an area with an altitude of 100m, the boiling point of water in the water heater is 100 ℃, and the heat preservation temperature is about 75 ℃; however, in a high altitude area with an altitude of 4000-. Meanwhile, the water heater in the high-altitude area can cause water in the water heater to be heated and boiled for a long time, so that a large amount of water vapor is formed, and safety accidents such as scalding of people and even explosion of the inner container are caused.
Disclosure of Invention
The invention aims to provide a pressure regulating valve and a water heater.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a pressure regulating valve comprises a valve body with an inlet and an outlet and a valve core in the valve body, wherein the inner wall of the valve body is provided with an annular lug in a radial extending manner near the inlet, a mounting seat is arranged near the outlet, the valve core is positioned between the annular lug and the mounting seat, one end of the gap between the annular lug and the annular lug is blocked by the valve core in an outward radial extending manner and is provided with an annular boss, a pressurizing spring is arranged between the annular lug and the mounting seat, the valve core comprises a shell with an inner hollow structure, the shell is provided with a pressure relief hole communicated with the inlet of the valve body, the pressure relief hole is blocked by a sealing plate in the shell, a safety spring is arranged between the sealing plate and the inner bottom wall; the elasticity of the pressurizing spring is smaller than that of the safety spring.
Preferably, the sealing plate is provided with a first sealing gasket, and the first sealing gasket seals the pressure relief hole.
Preferably, the pressure regulating valve further comprises a valve core guide mechanism matched with the installation seat, the valve core guide mechanism comprises a guide rod connected with the bottom of the shell, and the installation seat is of a conical cylinder-shaped structure consisting of a guide ring in clearance fit with the guide rod and a plurality of downward inclined rods arranged at equal intervals in the circumferential direction of the outer ring surface of the guide ring.
Preferably, the mounting base still includes and presets the screw thread with the valve body inner wall and carry out the external screw thread section of thick bamboo that cooperates, the down tube bottom and external screw thread section of thick bamboo top crimping or fixed connection, the clearance intercommunication valve body inner space of down tube and valve body export.
Preferably, the shell comprises an upper half cylinder and a lower half cylinder which are coaxially arranged, an internal thread is arranged in the lower half cylinder and matched with an external thread on the rod body of the guide rod, and the top of the guide rod penetrates through the sealing plate and the first sealing pad in sequence and then is fixedly connected with the upper half cylinder.
Preferably, a second sealing gasket is arranged between the annular boss and the annular convex block, a through hole is formed in the position, corresponding to the pressure relief hole, of the second sealing gasket, and an expansion portion is further arranged at the top of the guide rod and penetrates through the second sealing gasket and is used for crimping the second sealing gasket.
Preferably, the top surface of the shell of the valve core is further provided with a plurality of positioning columns, and the second sealing gasket is provided with a plurality of assembling holes matched with the positioning columns.
In the use process of the pressure regulating valve, the inlet of the pressure regulating valve is connected with a liquid discharge outlet, the valve core enables the annular boss to tightly attach the second sealing gasket to the annular convex block of the valve body under the elastic action of the pressurizing spring, and the sealing plate pushes the first sealing gasket to block the pressure relief hole in the valve core under the elastic action of the safety spring, so that liquid cannot pass through the valve body without pressure. Only when the pressure of the liquid reaches the value capable of overcoming the elasticity of the pressurizing spring, the hydraulic pressure can push the valve core to move downwards, and then the liquid flows into the gap between the valve body and the valve core and finally flows out of the gap of the inclined rod of the mounting seat to the outlet of the valve body.
If the pressurization spring fails to cause the failure of the pressurization spring in a special state, after the hydraulic pressure is increased to a condition that the elasticity of the safety spring can be overcome, the liquid pushes the first sealing gasket and the sealing plate on the valve core to move downwards, flows into a gap between the valve body and the valve core from the pressure relief hole and the drainage hole, and finally flows out to an outlet of the valve body from a gap of an inclined rod of the mounting seat. It should be noted here that the elastic force of the relief spring should be greater than that of the booster spring. The spring is made of any material and the elastic coefficient of the spring is determined, the optimal mode is to determine a bottom limit parameter according to the altitude of an application area and the safe pressure which can be borne by the liner material, and the upper limit parameter is determined according to the pressurization effect.
Preferably, the top surface of the shell of the valve core is further provided with a plurality of positioning columns, and the second sealing gasket is provided with a plurality of assembling holes matched with the positioning columns.
The water heater comprises the pressure regulating valve.
Preferably, the pressure regulating valve of the water heater is arranged at the water outlet of the water heater liner, and the water inlet of the water heater liner is provided with a one-way valve.
The water heater is applied to plateau areas.
When the pressure regulating valve is used in the water heater, the water inlet is required to be provided with the one-way valve for use, so that the inner container can keep airtightness before the internal pressure of the inner container reaches a target value, and the inner container is prevented from being communicated with the external atmospheric pressure. Along with the heating of depositing water in the inner bag, the inside air of inner bag and the inflation of being heated of depositing water self can progressively improve the internal pressure of inner bag to improve the boiling temperature that the inner bag deposited water, and then satisfy the heating of water heater and heat retaining preloading and set for the target.
More specifically, the water heater adopting the pressure regulating valve mainly solves the following problems:
1) when prior art's water heater was used in high altitude area, if the inlet tube closed or when phenomenons such as the pipeline infiltration appeared, the water heater inner bag was in the external state of intercommunication, and the inner bag is deposited water and is influenced by external atmospheric pressure for the boiling temperature of water reduces. This results in that the electric water heater can only lower the target heating temperature and the holding temperature when setting the program. The amount of hot water discharged after mixing the hot water having a relatively low temperature with the cold water is significantly reduced.
Similarly, on the basis of the irrespective altitude problem, the water heater of this application can show the boiling temperature who improves water compared with the water heater among the prior art to improve the heat preservation temperature of depositing water, and then improve hot water output.
2) If not according to the height above sea level and when adjusting the heating and the heat preservation numerical value of heater, when depositing water and receiving the height above sea level influence and leading to boiling temperature to be less than the preset temperature that the water heater heated, even deposit water and also can't reach all the time and make the electric bar stop heating even boiling, this has just produced a large amount of vapor, and the user can appear a large amount of steam and arrange outward and injure people's phenomenon when the drainage uses. Meanwhile, the boiled stored water has lower temperature, and the amount of hot water discharged after being mixed with cold water can be obviously reduced.
Compared with the prior art, the invention has the following advantages: the pressure regulating valve is used for increasing the air pressure value in the inner container of the water heater, so that the boiling point temperature of water in the water heater is increased, the hot water yield of the water heater is ensured, and the water heater is simple in structure and particularly suitable for high-altitude areas.
Drawings
FIG. 1 is a schematic top view of a pressure regulator valve according to an embodiment;
FIG. 2 is a schematic perspective view of the pressure regulator valve of FIG. 1 taken along line A-A;
FIG. 3 is a schematic structural view of section A-A of the pressure regulator valve of FIG. 1;
fig. 4 is a schematic structural diagram of the water heater in the specific embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-4, a pressure regulating valve comprises a valve body 1 with an inlet and an outlet, and a valve core in the valve body 1, wherein an annular convex block 11 is radially extended on the inner wall of the valve body near the inlet, a mounting seat is arranged near the outlet, the valve core is positioned between the annular convex block 11 and the mounting seat, an annular convex block 27 is radially extended outwards on one end of the valve core for plugging the gap of the annular convex block 11, and a pressurizing spring 16 is arranged between the annular convex block 11 and the mounting seat.
The case is including the casing that is inside hollow structure, the casing comprises first section of thick bamboo 21, second section of thick bamboo 22 of coaxial setting, is equipped with the pressure release hole 15 of intercommunication valve body import on first section of thick bamboo 21, and first sealed pad 26 shutoff on the closing plate 25 in pressure release hole 15 passes through the casing is equipped with insurance spring 24 between closing plate 25 and the casing diapire, still be equipped with the discharge orifice 23 of intercommunication valve body inner space and pressure release hole 15 on the first section of thick bamboo 21 lateral wall.
The lower half cylinder 22 is internally provided with an internal thread and matched with an external thread on a rod body of the guide rod 33, the top of the guide rod 33 penetrates through the sealing plate 25 and the first sealing gasket 26 in sequence and then is fixedly connected with the upper half cylinder 21, a second sealing gasket 12 is arranged between the annular boss 27 and the annular convex block 11, a through hole 14 is formed in the position, corresponding to the pressure relief hole 15, of the second sealing gasket 12, an expansion part 34 is further arranged at the top of the guide rod 33, and the expansion part 34 penetrates through the second sealing gasket 12 and is used for crimping the second sealing gasket 12. The top surface of the shell of the valve core is also provided with a plurality of positioning columns 13, and the second sealing gasket 12 is provided with a plurality of assembling holes matched with the positioning columns 13.
The mounting seat is in a cone-shaped structure consisting of a guide ring 32 in clearance fit with the guide rod 33 and a plurality of inclined rods 31 inclined downwards and arranged at equal intervals in the circumferential direction of the outer ring surface of the guide ring 32, and the space in the valve body 1 and the outlet of the valve body are communicated by the clearance of the inclined rods 31. The bottom of the diagonal rod 31 is in compression joint or fixed connection with the top end of the external thread cylinder 33, and the external thread cylinder 33 is in threaded fit with the preset threads on the inner wall of the valve body 1.
In the use process of the pressure regulating valve, the inlet of the pressure regulating valve is connected with a liquid discharge outlet, the valve core enables the annular boss to tightly attach the second sealing gasket to the annular convex block of the valve body under the elastic action of the pressurizing spring, and the sealing plate pushes the first sealing gasket to block the pressure relief hole in the valve core under the elastic action of the safety spring, so that liquid cannot pass through the valve body without pressure. Only when the pressure of the liquid reaches the value capable of overcoming the elasticity of the pressurizing spring, the hydraulic pressure can push the valve core to move downwards, and then the liquid flows into the gap between the valve body and the valve core and finally flows out of the gap of the inclined rod of the mounting seat to the outlet of the valve body.
If the pressurization spring fails to cause the failure of the pressurization spring in a special state, after the hydraulic pressure is increased to a condition that the elasticity of the safety spring can be overcome, the liquid pushes the first sealing gasket and the sealing plate on the valve core to move downwards, flows into a gap between the valve body and the valve core from the pressure relief hole and the drainage hole, and finally flows out to an outlet of the valve body from a gap of an inclined rod of the mounting seat. It should be noted here that the elastic force of the relief spring should be greater than that of the booster spring.
The water heater comprises the pressure regulating valve, the pressure regulating valve 5 is arranged at a water outlet of the water heater liner 4, and a one-way valve 6 is arranged at a water inlet of the water heater liner 4 in a matching mode.
When the pressure regulating valve is used in the water heater, the water inlet is required to be provided with a one-way valve for use, so that the inner container can keep tightness before the internal pressure of the inner container reaches a target value. Along with the heating of depositing water in the inner bag, the inside air of inner bag and the inflation of being heated of depositing water self can progressively improve the internal pressure of inner bag to improve the boiling temperature that the inner bag deposited water, and then satisfy the heating of water heater and heat retaining preloading and set for the target.
More specifically, the water heater adopting the pressure regulating valve mainly solves the following problems:
1) when prior art's water heater was used in high altitude area, if the inlet tube closed or when phenomenons such as the pipeline infiltration appeared, the water heater inner bag was in the external state of intercommunication, and the inner bag is deposited water and is influenced by external atmospheric pressure for the boiling temperature of water reduces. This results in that the electric water heater can only lower the target heating temperature and the holding temperature when setting the program. The amount of hot water discharged after mixing the hot water having a relatively low temperature with the cold water is significantly reduced.
Similarly, on the basis of the irrespective altitude problem, the water heater of this application can show the boiling temperature who improves water compared with the water heater among the prior art to improve the heat preservation temperature of depositing water, and then improve hot water output.
2) If not according to the height above sea level and when adjusting the heating and the heat preservation numerical value of heater, when depositing water and receiving the height above sea level influence and leading to boiling temperature to be less than the preset temperature that the water heater heated, even deposit water and also can't reach all the time and make the electric bar stop heating even boiling, this has just produced a large amount of vapor, and the user can appear a large amount of steam and arrange outward and injure people's phenomenon when the drainage uses. Meanwhile, the boiled stored water has lower temperature, and the amount of hot water discharged after being mixed with cold water can be obviously reduced.
Claims (10)
1. A pressure regulating valve comprises a valve body with an inlet and an outlet and a valve core in the valve body, and is characterized in that an annular lug is radially extended and arranged on the inner wall of the valve body close to the inlet, an installation seat is arranged close to the outlet, the valve core is positioned between the annular lug and the installation seat, an annular boss is radially extended and arranged at one end of the gap of the annular lug blocked by the valve core, a pressurizing spring is arranged between the annular lug and the installation seat, the valve core comprises a shell with an internal hollow structure, a pressure relief hole communicated with the inlet of the valve body is arranged on the shell, the pressure relief hole is blocked by a sealing plate in the shell, a safety spring is arranged between the sealing plate and the bottom wall in the shell, and a pressure relief hole communicated; the elasticity of the pressurizing spring is smaller than that of the safety spring.
2. The pressure-regulating valve of claim 1, wherein said sealing plate has a first gasket sealing said pressure-relief opening.
3. The pressure-regulating valve according to claim 1, further comprising a valve core guide mechanism engaged with the mounting seat, wherein the valve core guide mechanism comprises a guide rod connected with the bottom of the housing, and the mounting seat has a cone-shaped structure consisting of a guide ring in clearance fit with the guide rod and a plurality of downwardly inclined rods circumferentially arranged at equal intervals around the outer circumferential surface of the guide ring.
4. The pressure regulating valve according to claim 3, wherein the mounting seat further comprises an external thread cylinder which is matched with the preset thread on the inner wall of the valve body, the bottom of the inclined rod is in press fit or fixed connection with the top end of the external thread cylinder, and the gap of the inclined rod is communicated with the space in the valve body and the outlet of the valve body.
5. The pressure-regulating valve according to claim 3, wherein the housing is composed of an upper half cylinder and a lower half cylinder which are coaxially arranged, the lower half cylinder is internally provided with internal threads and is matched with external threads on the rod body of the guide rod, and the top of the guide rod passes through the sealing plate and the first sealing pad in sequence and is fixedly connected with the upper half cylinder.
6. The pressure-regulating valve according to claim 4, wherein a second gasket is disposed between the annular boss and the annular projection, a through hole is formed in the second gasket corresponding to the pressure relief hole, and an enlarged portion is further disposed on the top of the guide rod, and penetrates through the second gasket and is in pressure contact with the second gasket.
7. The pressure-regulating valve according to claim 6, wherein the top surface of the housing of the valve core is further provided with a plurality of positioning posts, and the second gasket is provided with a plurality of assembling holes matched with the positioning posts.
8. A water heater comprising the pressure regulating valve of any one of claims 1-7.
9. The water heater as claimed in claim 8, wherein the pressure regulating valve is arranged at the water outlet of the water heater liner, and a one-way valve is arranged at the water inlet of the water heater liner.
10. Use of a water heater according to claim 8 in an plateau area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110145500.4A CN112833538B (en) | 2021-02-03 | 2021-02-03 | Pressure regulating valve and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110145500.4A CN112833538B (en) | 2021-02-03 | 2021-02-03 | Pressure regulating valve and water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112833538A true CN112833538A (en) | 2021-05-25 |
| CN112833538B CN112833538B (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110145500.4A Active CN112833538B (en) | 2021-02-03 | 2021-02-03 | Pressure regulating valve and water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112833538B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2519893Y (en) * | 2001-11-10 | 2002-11-06 | 玉环县万利得机械厂 | Pressure releasing structure for one-way valve of electric water heater |
| CN201311061Y (en) * | 2008-09-19 | 2009-09-16 | 傅永旺 | Electric water heater with balance-type one-way relief valve |
| CN205190855U (en) * | 2015-12-07 | 2016-04-27 | 浙江华益精密机械股份有限公司 | Novel safety valve |
| CN207486113U (en) * | 2017-11-16 | 2018-06-12 | 中山市金旺电器科技有限公司 | A kind of water inlet/outlet device of water heater |
| JP2020148251A (en) * | 2019-03-13 | 2020-09-17 | 三菱電機株式会社 | Relief valve-integrated decompression valve and water heater |
| CN212318889U (en) * | 2020-12-14 | 2021-01-08 | 天津合创海华科技发展有限公司 | Pressure relief valve |
-
2021
- 2021-02-03 CN CN202110145500.4A patent/CN112833538B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2519893Y (en) * | 2001-11-10 | 2002-11-06 | 玉环县万利得机械厂 | Pressure releasing structure for one-way valve of electric water heater |
| CN201311061Y (en) * | 2008-09-19 | 2009-09-16 | 傅永旺 | Electric water heater with balance-type one-way relief valve |
| CN205190855U (en) * | 2015-12-07 | 2016-04-27 | 浙江华益精密机械股份有限公司 | Novel safety valve |
| CN207486113U (en) * | 2017-11-16 | 2018-06-12 | 中山市金旺电器科技有限公司 | A kind of water inlet/outlet device of water heater |
| JP2020148251A (en) * | 2019-03-13 | 2020-09-17 | 三菱電機株式会社 | Relief valve-integrated decompression valve and water heater |
| CN212318889U (en) * | 2020-12-14 | 2021-01-08 | 天津合创海华科技发展有限公司 | Pressure relief valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112833538B (en) | 2022-04-29 |
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