CN111219510A - Pressure protection valve and gas water heater - Google Patents
Pressure protection valve and gas water heater Download PDFInfo
- Publication number
- CN111219510A CN111219510A CN201811419761.5A CN201811419761A CN111219510A CN 111219510 A CN111219510 A CN 111219510A CN 201811419761 A CN201811419761 A CN 201811419761A CN 111219510 A CN111219510 A CN 111219510A
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- Prior art keywords
- valve
- seat
- core assembly
- plug
- valve rod
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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
- 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
- F16K17/044—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 with more than one spring
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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
- F16K1/36—Valve members
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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
- F16K1/42—Valve seats
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a pressure protection valve and a gas water heater, comprising a valve body, wherein a valve core assembly is arranged in a valve cavity of the valve body, and the valve body is provided with a water inlet and a water outlet which are communicated with the valve cavity; it is characterized in that a bypass pipe communicated with the valve cavity is also arranged on the valve body; the valve core comprises a first valve core assembly and a second valve core assembly; wherein: the second valve core assembly is arranged in the valve cavity and used for controlling the on and off of the water inlet, and the second valve core assembly is in a normally open state; the first valve core assembly is arranged in the bypass and used for controlling the action of the second valve core assembly; the valve comprises a first base, a first valve rod, a first valve plug and a first elastic piece, wherein the first base, the first valve rod, the first valve plug and the first elastic piece are arranged in a bypass; the first valve plug can be slidably and hermetically connected with the inner wall of the bypass; the first valve plug is in driving connection with a first valve rod, the first valve rod can be limited on the first valve seat in a sliding mode, and the first valve rod drives the second valve core assembly to act; two ends of the first elastic piece respectively abut against the first base and the first valve plug.
Description
Technical Field
The invention relates to the field of valves, in particular to a pressure protection valve and a gas water heater using the same.
Background
The existing domestic water has the problem of pressure fluctuation generally due to reasons such as water supply and terminal use, and the water inlet end of the water pipe is a normally open valve and the water outlet end of the water pipe is a normally closed valve for some normally open connecting water pipes, so that the water pipe is easy to expand and crack when the pressure in the water pipe rises suddenly, for example, the water pipe is frozen and expanded, and the water can crack from the weak part of the pressure bearing capacity of the water pipe, so that water leakage is caused. If the user does not discover in time that the water inlet pipeline is closed, water in the water source pipeline can continuously enter the connecting water pipe and run out from the crack, so that serious water leakage is caused, and property loss and safety problems such as floor soaking, electric leakage and the like are caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pressure protection valve which can timely close a water inlet connecting pipe when the pressure in a water pipe suddenly rises in the prior art.
The invention aims to solve another technical problem of providing a gas water heater which can timely close a water inlet connecting pipe when the pressure in a water pipe suddenly rises so as to avoid the water leakage phenomenon.
The technical scheme adopted by the invention for solving the technical problems is as follows: a pressure protection valve comprises a valve body, wherein a valve core assembly is arranged in a valve cavity of the valve body, and the valve body is provided with a water inlet and a water outlet which are communicated with the valve cavity;
the valve is characterized in that the valve body is also provided with a bypass pipe communicated with the valve cavity;
the valve core comprises a first valve core assembly and a second valve core assembly; wherein:
the second valve core assembly is arranged in the valve cavity and used for controlling the on and off of the water inlet, and the second valve core assembly is in a normally open state;
the first valve core assembly is arranged in the bypass and used for controlling the action of the second valve core assembly; the first valve rod is arranged in the bypass, and the first valve rod is arranged in the bypass; the first valve plug is slidably and hermetically connected with the inner wall of the bypass; the first valve plug is in driving connection with the first valve rod, the first valve rod can be limited on the first valve seat in a sliding mode, and the first valve rod drives the second valve core assembly to act;
the two ends of the first elastic piece respectively abut against the first base and the first valve plug.
Preferably, the first valve core assembly further comprises a first valve seat, and a first water through hole is formed in the first valve seat; the first valve plug is positioned between the first valve seat and the first seat.
Preferably, the first base and the first valve seat are both provided with first sliding holes, and the first valve rod can be limited in the first sliding holes in a sliding manner.
As a further improvement of the above solutions, in order to limit the stroke of the first valve rod, a limit component for limiting the moving distance of the first valve rod may be further provided on the side wall of the bypass.
Preferably, the side wall of the side pipe is provided with a through hole communicated with the inner cavity of the side pipe;
the limiting assembly comprises a top pin, a third elastic piece, a spring seat and a limiting seat; the limiting seat is provided with a pin hole for the ejector pin to pass through; the spring seat is in driving connection with the ejector pin and can slide relative to the through hole, and two ends of the third elastic piece respectively abut against the spring seat and the limiting seat;
and a second clamping groove capable of containing the ejector pin is formed in the first valve rod.
Preferably, the limiting seat is of a barrel-shaped structure and is fixed in the through hole; the spring seat can be accommodated in the inner cavity of the limiting seat in a sliding manner.
The second valve core assembly in each of the above schemes may have a plurality of types, preferably, the second valve core assembly may include a second valve seat, a second valve rod, a second valve plug, a second elastic member, and a second base;
the second valve rod can be limited on the second valve seat and the second base in a sliding way, and the second valve plug is connected with the second valve rod in a driving way and is positioned between the second valve seat and the second base; two ends of the second elastic piece respectively abut against the second valve plug and the second base;
the first valve rod is provided with a first clamping groove used for limiting the head of a second valve rod extending out of the second valve seat, and the side wall of the first clamping groove is an arc-shaped surface or an inclined surface which is convenient for the second valve rod to slide out of the first clamping groove.
In order to facilitate the assembly of the second valve plug and ensure the structural stability, a piston seat may be provided on the second valve stem, on which the second valve plug is disposed.
Preferably, the second base and the second valve seat are both provided with second sliding holes, the tail of the second valve rod can be limited in the second sliding hole on the second base in a sliding manner, and the head of the second valve rod penetrates through the second sliding hole on the second valve seat and abuts against the first valve rod.
The gas water heater using the pressure protection valves is characterized in that a water inlet of the valve body is connected with a domestic water pipe, and a water outlet on the valve body is connected with an inlet of a cold water inlet pipe of the gas water heater;
the cold water inlet pipe is also connected with a plastic shell communicated with the cold water inlet pipe, and a flow sensor and a pressure stabilizer are integrated in the plastic shell.
Compared with the prior art, the pressure protection valve and the gas water heater provided by the invention can timely disconnect the normally open pipeline from the water source when the pressure is suddenly increased through the interaction between the two valve core assemblies, so that the water leakage phenomenon is avoided, and the use safety is further ensured.
Drawings
FIG. 1 is a longitudinal cross-sectional view (normal use) of an embodiment of the present invention;
FIG. 2 is a longitudinal cross-sectional view (pressure relief state) of an embodiment of the present invention;
fig. 3 is a schematic view of embodiment 2 of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 and 2, the pressure protection valve includes:
the valve comprises a valve body 1, wherein the wall of the valve body 1 is provided with a water inlet 11, a water outlet 12 and a side pipe 13 which are communicated with a valve cavity 14; wherein the water inlet is connected with a water inlet pipe, and the water outlet 12 is connected with a water outlet pipe.
And the two valve core assemblies comprise a second valve core assembly 2 arranged on the water inlet 11 and used for controlling the on and off of the water inlet 11 and a first valve core assembly 3 arranged in the bypass pipe 13 and used for controlling the second valve core assembly 2 to act. Wherein:
and the second valve core assembly 2 comprises a second valve seat 21, a second valve rod 22, a second valve plug 23, a second elastic element 24 and a second base 25.
The second base 25 and the second valve seat 21 are arranged in the valve cavity 14 at intervals along the water flow direction, the second base 25 is arranged close to the port of the water inlet 11, and the second base 25 and the second valve seat 21 are both provided with a water through hole 26 for water flow to pass through and a second slide hole 27 for accommodating the second valve rod. The tail part of the second valve rod 22 is slidably accommodated in a second sliding hole 27 on the second base 25, and the head part of the second valve rod is slidably exposed out of the second valve seat 21 through the second sliding hole 27 on the second valve seat 21; the second valve rod 22 is connected with a piston seat 28 in a driving way, and the second valve plug 23 is arranged on the piston seat 28 and moves along with the piston seat 28; the second elastic member 24 is a spring, and is disposed on the second valve rod 22, and two ends of the second elastic member respectively abut against the second base 25 and the piston seat 28, so that the second valve plug has a tendency of moving away from the second base and closing the water through hole 26 on the second valve seat 21 toward the second valve seat.
The first valve core assembly 3 comprises a first base 31, a first valve rod 32, a first valve plug 33, a first valve seat 38 and a first elastic member 34. The first base 31 and the first valve plug 33 are arranged in the side pipe 13 at intervals, the first base 31 blocks the port of the side pipe 13, and the first base 31 is in threaded connection with the side pipe in the embodiment; the first base 31 and the first valve seat 38 are provided with a first slide hole 30; the tail part of the first valve rod can be slidably and hermetically inserted in the first sliding hole 30 on the first base 31, and the head part of the first valve rod passes through the first sliding hole 30 on the first valve seat 38 and is exposed out of the side pipe 13.
The first valve seat 38 is provided with a plurality of first water through holes 39 so that the first valve plug 33 senses the water pressure in the valve cavity.
The first valve plug 33 is located between the first valve seat 38 and the first seat 31, is sealingly connected to the peripheral wall of the side pipe by a sealing ring 36, and is movable relative to the side pipe by an external force. The first plug is in driving connection with the first valve stem 22; in this embodiment, the first valve plug and the first valve stem are a single piece.
The first elastic element 34 is a spring, and is disposed on the first valve rod 32, and two ends of the first elastic element respectively abut against the first base 31 and the first valve plug 33, so that the first valve plug 33 tends to be away from the first base 31.
The limit component 4 comprises a top pin 41, a third elastic piece 42, a spring seat 43 and a limit seat 44. A through hole 15 communicated with the inner cavity of the side pipe is formed in the side wall of the side pipe 13; the limit seat 44 is provided with a pin hole 45 for the top pin to pass through.
The limiting seat 44 in this embodiment is a barrel-shaped structure and is fixed in the through hole 15, a pin hole 45 is formed on the bottom surface of the limiting seat, and the side wall of the limiting seat is in threaded connection with the through hole 15. One end of the knock pin 41 is slidably inserted into the pin hole 45, and the other end of the knock pin passes through the spring seat 43 and abuts against the first valve rod 32; the spring seat 43 is slidably received in the interior cavity of the retainer seat 44. The knock pin 41 and the spring seat 43 are a single piece in this embodiment.
When pressure was in the normal value within range in the water route, first valve rod pushed down under the effect of first elastic component, and the head end card of second valve rod is in first draw-in groove 35, and second elastic component 24 is compressed, and the water hole of crossing on the second valve base is opened, and this protection valve is in normally open state.
When pressure fluctuation suddenly rises in the water route, when the power that water pressure was used on first valve plug was greater than the elasticity of first elastic component, promote first valve plug and remove the first elastic component of extrusion, first valve plug drive valve rod shifts up, and first draw-in groove breaks away from spacing to the second valve rod head end along with the removal of first valve rod, cancels the power of applying on the second valve rod.
At the moment, the second valve rod moves towards the second valve seat under the action of the second elastic element, the second valve plug closes the water through hole on the second valve seat, and the protection valve is closed.
At the moment, even if the pressure in the pipe rises to be very high, when the pipeline or the connecting pipe fitting is burst, because the water inlet is closed, the water remained in the pipeline can be discharged at most, the phenomenon of a large amount of water leakage can not occur, and the use safety is effectively ensured.
When the second clamping groove on the first valve rod moves upwards to the ejector pin position, the head of the ejector pin is inserted into the second clamping groove under the action of the third elastic piece, the first valve rod is limited to continue moving, and the first valve rod is prevented from being separated from the side pipe.
When the pressure in the pipeline returns to normal, the knock pin is pulled manually to make the knock pin break away from the limit of the first valve rod, the first valve rod moves downwards under the action of the first elastic piece, when the head of the second valve rod is clamped into the first clamping groove on the first valve rod, the first valve rod is limited, meanwhile, the second valve rod is pushed backwards by the first valve rod, the second valve plug moves backwards to open the water passing hole on the second valve seat, and the protection valve is in an open state.
Example 2
As shown in fig. 3, the pressure protection valve of embodiment 1 is applied to the water heater connection pipe; the concrete mode is as follows: the water inlet 11 of the valve body is connected with a living water pipe 91, and the water outlet 12 of the valve body is connected with a cold water inlet pipe 92 of the water heater; the cold water inlet pipe 92 is connected with a plastic shell 93, the plastic shell 93 is located at the downstream of the pressure protection valve, a pressure sensor (not shown in the figure) and a pressure stabilizer (not shown in the figure) are arranged in the plastic shell, and the pressure sensor and the pressure stabilizer are integrated in the plastic shell 93 and used for detecting the water passing amount of the water inlet pipe 92 and the water pressure in the constant water inlet pipe.
The rest is the same as in example 1.
When the pressure in the pipeline of the water heater is suddenly increased, the plastic shell is easy to break due to poorer pressure bearing performance compared with a metal water pipe, so that the residual water in the water pipe flows out from the broken part; at the moment, if the cold water inlet pipe is not closed in time, water in the living water pipe can continuously enter the cold water inlet pipe, and the water can run out from the fracture part, so that water runs out. This embodiment is owing to set up the pressure protection valve between life water pipe 91 and cold water inlet tube 92, when the intraductal pressure suddenly risees, this protection valve can self-closing cold water inlet tube to avoid the emergence of the phenomenon of running out of water.
Claims (10)
1. A pressure protection valve comprises a valve body (1), wherein a valve core assembly is arranged in a valve cavity (14) of the valve body (1), and the valve body (1) is provided with a water inlet (11) and a water outlet (12) which are communicated with the valve cavity (13);
the valve is characterized in that a bypass pipe (13) communicated with the valve cavity (14) is also arranged on the valve body (1);
the valve core assembly comprises a second valve core assembly (2) and a first valve core assembly (3); wherein:
the second valve core assembly (2) is arranged in the valve cavity (14) and used for controlling the on-off of the water inlet (11), and the second valve core assembly (2) is in a normally open state
A first valve core assembly (3) arranged in the bypass (13) and used for controlling the action of the second valve core assembly; comprises a first seat (31), a first valve rod (32), a first valve plug (33) and a first elastic piece (34) which are arranged in the bypass; the first valve plug (33) is slidably and hermetically connected with the inner wall of the bypass; the first valve plug is in driving connection with the first valve rod (32), the first valve rod (32) can be limited on the first valve seat (31) in a sliding mode, and the first valve rod drives the second valve core assembly (2) to act;
two ends of the first elastic piece (34) respectively abut against the first base (31) and the first valve plug (33).
2. The pressure protection valve according to claim 1, characterized in that the first spool assembly (3) further comprises a first valve seat (38), the first valve seat (38) being provided with a first water through hole (39); the first valve plug (33) is located between the first valve seat (38) and the first seat (31).
3. The pressure protection valve according to claim 2, wherein the first seat (31) and the first valve seat (38) are each provided with a first slide hole (30), and the first valve rod (32) is slidably retained in the first slide hole (30).
4. The pressure protection valve according to claim 3, wherein a limit component (4) for limiting the moving distance of the first valve rod is further arranged on the side wall of the bypass.
5. The pressure protection valve according to claim 4, characterized in that the side wall of the side pipe (13) is provided with a through hole (15) communicated with the inner cavity of the side pipe;
the limiting assembly (4) comprises a top pin (41), a third elastic piece (42), a spring seat (43) and a limiting seat (44); a pin hole (45) through which the ejector pin passes is formed in the limiting seat (44); the spring seat (43) is connected with the ejector pin (45) in a driving mode and can slide relative to the through hole (15), and two ends of the third elastic piece (42) respectively abut against the spring seat (43) and the limiting seat (44);
and a second clamping groove (37) capable of containing the ejector pin (41) is formed in the first valve rod (32).
6. The pressure protection valve according to claim 5, wherein the retainer seat (44) is a barrel-shaped structure fixed in the through hole (15); the spring seat (43) can be slidingly accommodated in the inner cavity of the limiting seat (44).
7. Pressure protection valve according to any of claims 1 to 6, characterized in that said second spool assembly (2) comprises a second valve seat (21), a second stem (22), a second plug (23), a second elastic member (24) and a second seat (25);
the second valve rod (22) can be limited on the second valve seat (21) and a second base (25) in a sliding way, and the second valve plug (23) is connected with the second valve rod (22) in a driving way and is positioned between the second valve seat (21) and the second base (25); two ends of the second elastic piece respectively abut against the second valve plug (23) and the second base (25);
the first valve rod (32) is provided with a first clamping groove (25) used for limiting the head of a second valve rod extending out of the second valve seat, and the side wall of the first clamping groove is an arc-shaped surface or an inclined surface which is convenient for the second valve rod to slide out of the first clamping groove (25).
8. Pressure protection valve according to claim 7, characterized in that the second valve stem (22) is provided with a piston seat (28) and the second valve plug (23) is provided on the piston seat (28).
9. The pressure protection valve according to claim 8, wherein the second base (25) and the second valve seat (21) are both provided with a second sliding hole (27), the tail of the second valve rod (22) is slidably limited in the second sliding hole (27) of the second base (25), and the head of the second valve rod (22) passes through the second sliding hole (27) of the second valve seat (21) and interferes with the first valve rod (32).
10. Gas water heater using pressure protection valve according to any of claims 1 to 9, characterized in that the inlet of the valve body is connected with the domestic water pipe (91), and the outlet of the valve body is connected with the inlet of the cold water inlet pipe (92) of the gas water heater;
the cold water inlet pipe (92) is also connected with a plastic shell (93) communicated with the cold water inlet pipe (92), and a flow sensor and a pressure stabilizer are integrated in the plastic shell (93).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419761.5A CN111219510B (en) | 2018-11-26 | 2018-11-26 | Pressure protection valve and gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811419761.5A CN111219510B (en) | 2018-11-26 | 2018-11-26 | Pressure protection valve and gas water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111219510A true CN111219510A (en) | 2020-06-02 |
| CN111219510B CN111219510B (en) | 2021-06-15 |
Family
ID=70805594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811419761.5A Active CN111219510B (en) | 2018-11-26 | 2018-11-26 | Pressure protection valve and gas water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219510B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623155A (en) * | 2019-02-28 | 2020-09-04 | 宁波方太厨具有限公司 | Pressure protection valve and gas water heater |
| CN112392983A (en) * | 2020-11-16 | 2021-02-23 | 宁波方太厨具有限公司 | Check valve and gas water heater system comprising same |
| CN112524311A (en) * | 2020-11-30 | 2021-03-19 | 宁波方太厨具有限公司 | Water inlet joint and gas water heater comprising same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2292194Y (en) * | 1996-11-28 | 1998-09-23 | 施久恒 | Bolt type air valve |
| CN2474848Y (en) * | 2001-04-10 | 2002-01-30 | 张玉茂 | Steady pressure cut-off water valve |
| CN201326795Y (en) * | 2008-11-24 | 2009-10-14 | 苏州市职业大学 | Shut-down self-closing valve |
| CN203431204U (en) * | 2013-08-12 | 2014-02-12 | 郑州永邦环保科技有限公司 | Fuel gun and pressure-less automatic sealing system thereof |
| CN206723476U (en) * | 2017-05-26 | 2017-12-08 | 成都航空职业技术学院 | A kind of faucet water saving device |
-
2018
- 2018-11-26 CN CN201811419761.5A patent/CN111219510B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2292194Y (en) * | 1996-11-28 | 1998-09-23 | 施久恒 | Bolt type air valve |
| CN2474848Y (en) * | 2001-04-10 | 2002-01-30 | 张玉茂 | Steady pressure cut-off water valve |
| CN201326795Y (en) * | 2008-11-24 | 2009-10-14 | 苏州市职业大学 | Shut-down self-closing valve |
| CN203431204U (en) * | 2013-08-12 | 2014-02-12 | 郑州永邦环保科技有限公司 | Fuel gun and pressure-less automatic sealing system thereof |
| CN206723476U (en) * | 2017-05-26 | 2017-12-08 | 成都航空职业技术学院 | A kind of faucet water saving device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623155A (en) * | 2019-02-28 | 2020-09-04 | 宁波方太厨具有限公司 | Pressure protection valve and gas water heater |
| CN111623155B (en) * | 2019-02-28 | 2021-05-18 | 宁波方太厨具有限公司 | Pressure protection valve and gas water heater |
| CN112392983A (en) * | 2020-11-16 | 2021-02-23 | 宁波方太厨具有限公司 | Check valve and gas water heater system comprising same |
| CN112392983B (en) * | 2020-11-16 | 2021-12-24 | 宁波方太厨具有限公司 | Check valve and gas water heater system comprising same |
| CN112524311A (en) * | 2020-11-30 | 2021-03-19 | 宁波方太厨具有限公司 | Water inlet joint and gas water heater comprising same |
| CN112524311B (en) * | 2020-11-30 | 2021-12-03 | 宁波方太厨具有限公司 | Water inlet joint and gas water heater comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111219510B (en) | 2021-06-15 |
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