CN110657298A - Combined one-way check valve and hot water system - Google Patents

Combined one-way check valve and hot water system Download PDF

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Publication number
CN110657298A
CN110657298A CN201911111307.8A CN201911111307A CN110657298A CN 110657298 A CN110657298 A CN 110657298A CN 201911111307 A CN201911111307 A CN 201911111307A CN 110657298 A CN110657298 A CN 110657298A
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CN
China
Prior art keywords
water
water pipe
hot water
pipe section
check valve
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Pending
Application number
CN201911111307.8A
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Chinese (zh)
Inventor
陈光耀
黄仁忠
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TCL Home Appliances Zhongshan Co Ltd
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TCL Home Appliances Zhongshan Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by TCL Home Appliances Zhongshan Co Ltd filed Critical TCL Home Appliances Zhongshan Co Ltd
Priority to CN201911111307.8A priority Critical patent/CN110657298A/en
Publication of CN110657298A publication Critical patent/CN110657298A/en
Pending legal-status Critical Current

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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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L29/00—Joints with fluid cut-off means
    • F16L29/02—Joints with fluid cut-off means with a cut-off device in one of the two pipe ends, the cut-off device being automatically opened when the coupling is applied
    • 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
    • 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

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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)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Abstract

The invention discloses a combined one-way check valve and a hot water system, wherein the combined one-way check valve comprises a first tee joint and a second tee joint, the first tee joint and the second tee joint are connected through the one-way check valve, and a stop valve is arranged between the second tee joint and the one-way check valve. According to the invention, the one-way check valve is adopted, so that water flows in the direction from the first tee to the second tee, and meanwhile, the stop valve is opened in a matching manner, so that the one-way delivery of water is realized, and a zero cold water circulating system is formed; through closing the stop valve, the stop valve passageway is closed, realizes that rivers stabilize from the gondola water faucet outflow, utilizes the water pump of setting on first cold water pipe section to realize the pressure boost simultaneously.

Description

Combined one-way check valve and hot water system
Technical Field
The invention relates to the field of household appliances, in particular to a combined one-way check valve and a hot water system.
Background
The valve used by the existing water heater pipeline is single in structure, cold water, hot water or cold and hot mixed water can only be conveyed, the cold water pipeline and the hot water pipeline are mutually independent, when the gas water heater is started every time, a section of cold water needs to be discharged, time is delayed, water is wasted, especially, if the distance between a toilet and the water heater is far, a large amount of cold water needs to be discharged firstly, in addition, the toilet needs to be opened after water is shut down midway and then heated by cold and hot, the use experience is very unsatisfactory, in order to ensure that the water flow of the water heater is constant, a water pump needs to be independently arranged on the water heater, the volume of the water heater is increased, and the energy consumption.
The existing water heater does not have the compatibility of zero cold water and a pressurization function.
Disclosure of Invention
The invention mainly aims to provide a combined one-way check valve and a hot water system, and aims to solve the problems that the existing water heater pipeline valve is single in structure and hot water is output after a large amount of cold water is discharged.
In order to achieve the purpose, the combined one-way check valve provided by the invention comprises a first tee joint and a second tee joint, wherein the first tee joint and the second tee joint are connected through the one-way check valve, and a stop valve is arranged between the second tee joint and the one-way check valve.
The invention provides a hot water system on the basis of the combined one-way check valve, which comprises a heat exchange assembly, a first cold water pipe section, a water pump, a water flow sensor, a first hot water pipe section, a temperature sensor, a water mixing valve and the combined one-way check valve;
the combined one-way check valve comprises a first tee joint and a second tee joint, the first tee joint and the second tee joint are connected through the one-way check valve, and a stop valve is arranged between the second tee joint and the one-way check valve;
a water inlet pipe is arranged on the first cold water pipe section, the first cold water pipe section is communicated with the input end of the heat exchange assembly, and the first hot water pipe section is communicated with the output end of the heat exchange assembly;
the water pump and the water flow sensor are arranged on the first cold water pipe section;
the temperature sensor is arranged on the first hot water pipe section;
one end, far away from the heat exchange assembly, of the first hot water pipe section is communicated with the water mixing valve through the first tee joint;
and one end of the first cold water pipe section, which is far away from the heat exchange assembly, is connected with the second tee joint.
Optionally, the first cold water pipe section is connected with the second tee joint through a water return pipe.
Optionally, one end of the second tee joint, which is far away from the first cold water pipe section, is connected with the mixing valve.
Optionally, the first cold water pipe section is connected to the mixing valve via a second cold water pipe section.
Optionally, the first hot water pipe section is connected with the first tee joint through a second hot water pipe section.
Optionally, the heat exchange assembly comprises a heat exchanger, a gas pipeline and a gas valve arranged on the gas pipeline;
the gas pipeline is connected with the heat exchanger;
the first cold water pipe section is communicated with the input end of the heat exchanger, and the first hot water pipe section is communicated with the output end of the heat exchanger.
Optionally, the hot water system further includes a water heater body, and the heat exchange assembly, the first cold water pipe section, the water pump, the water flow sensor, the first hot water pipe section, and the temperature sensor are disposed inside the water heater body.
Optionally, a controller is arranged in the water heater body, and the heat exchange assembly, the water pump, the water flow sensor and the temperature sensor are electrically connected with the controller respectively.
Optionally, the shut-off valve is in wired or wireless connection with the controller.
According to the technical scheme, the one-way check valve is adopted, so that water can flow to the second tee joint only through the first tee joint, and one-way water conveying is realized; through setting up the stop valve, through opening the stop valve, realize the one-way flow control of water, and then make combined one-way check valve can be used for the one-way circulation of hot water, form zero cold water circulating system, through closing the stop valve, utilize the water pump pressure boost that sets up on first cold water pipe section simultaneously.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is an exploded view of a combination one-way check valve in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the combination check valve according to an embodiment of the present invention;
FIG. 3 is a schematic view of a hot water system according to an embodiment of the present invention;
fig. 4 is a schematic view of a hot water system with a water return pipe according to an embodiment of the present invention.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
10 Water heater body 11 Cold water inlet joint
12 Gas inlet joint 13 Hot water outlet joint
14 Controller 15 Shower head
16 Water mixing valve 20 Combined one-way check valve
21 First three-way 22 One-way check valve
23 Second three-way 24 Plug cover
25 Stop valve 30 Heat exchange assembly
31 Heat exchanger 32 Gas pipeline
33 Gas valve 40 First cold water pipe section
41 Water pump 42 Water inlet pipe
43 Water flow sensor 50 Second cold water pipe section
60 First hot water pipe section 61 Temperature sensor
70 Second hot water pipe section 80 Water return pipe
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is an exploded view of a combined check valve according to an embodiment of the present invention, fig. 2 is a schematic view of an internal structure of the combined check valve according to an embodiment of the present invention, and the present invention provides a combined check valve, which includes a first tee 21 and a second tee 23, wherein the first tee 21 and the second tee 23 are connected by a check valve 22, and a stop valve 25 is disposed between the second tee 23 and the check valve 22. The first tee joint 21 is provided with three interfaces, wherein one interface is connected with the one-way check valve 22; the second tee 23 is provided with three connectors, one of the connectors is connected with the stop valve 25, and one end of the stop valve 25, which is far away from the second tee 23, is connected with the one-way check valve 22.
When the water heater is used, the stop valve 25 is opened to enable hot water to flow to the second tee joint 23 through the one-way check valve 22 and the stop valve 25 in sequence, and water output by the second tee joint 23 can be input into the heat exchange assembly 30 again until the water in the pipeline reaches a set temperature.
By adopting the structure of the combined one-way check valve 20, water in the hot water pipeline can flow into the cold water pipeline, and the water in the cold water pipeline can not flow back to the hot water pipeline under the action of the one-way check valve 22, so that water circulation is realized, and when the first tee joint 21 is connected with heating equipment, the water in the pipeline can be heated circularly, and the effect of zero cold water is realized.
Through setting up stop valve 25, when closing stop valve 25, hot water can not pass through first tee bend 21 to second tee bend 23 flows, when opening outside water pump, when continuous input to the system, because stop valve 25 will first tee bend 21 with the passageway between the second tee bend 23 is closed for the liquid pressure through first tee bend 21 increases gradually, realizes carrying out the effect of pressure boost in the pipeline.
The stop valve 25 can be a manual stop valve 25 or an electric stop valve 25, and the control mode of the stop valve 25 can adopt the prior art and is not described in detail.
The present invention provides an embodiment of a hot water system based on the above-mentioned combination one-way check valve 20.
Referring to fig. 3, fig. 3 is a schematic view of a hot water system according to an embodiment of the present invention, the hot water system includes a heat exchange assembly 30, a first cold water pipe 40, a water pump 41, a water flow sensor 43, a first hot water pipe 60, a temperature sensor 61, a mixing valve 16, and the above-mentioned combination check valve 20; the combined one-way check valve 20 comprises a first tee joint 21 and a second tee joint 23, the first tee joint 21 and the second tee joint 23 are connected through a one-way check valve 22, and a stop valve 25 is arranged between the second tee joint 23 and the one-way check valve 22.
The first cold water pipe segment 40 is provided with a water inlet pipe 42, the first cold water pipe segment 40 is communicated with the input end of the heat exchange assembly 30, and the first hot water pipe segment 60 is communicated with the output end of the heat exchange assembly 30; the water pump 41 and the water flow sensor 43 are arranged on the first cold water pipe section 40; the temperature sensor 61 is arranged on the first hot water pipe section 60; the end of the first hot water pipe section 60 away from the heat exchange assembly 30 is communicated with the water mixing valve 16 through the first tee joint 21; the end of the first cold water pipe segment 40 away from the heat exchange assembly 30 is connected to the second tee 23.
The heat exchange assembly 30 is used as a heating device, the water pump 41 and the stop valve 25 are turned on, cold water is input into the heat exchange assembly 30 through the first cold water pipe section 40, and after being heated by the heat exchange assembly 30, is delivered to the combined one-way check valve 20 by the first hot water pipe section 60, and the hot water is delivered to the first cold water pipe section 40 via the first three-way 21, the one-way check valve 22, the stop valve 25 and the second three-way 23 in sequence, under the action of the water pump 41, cold water is circularly delivered to the heat exchange assembly 30 until the temperature sensor 61 detects that the hot water output by the first hot water pipe segment 60 reaches a set temperature, the stop valve 25 is closed, at this time, the hot water output by the first hot water pipe segment 60 to the mixing valve 16 is water at a preset temperature, and at this time, the hot water system is in a zero cold water mode.
The stop valve 25 of the combined check valve 20 is normally closed, and the output water temperature T of the first hot water pipe section 60 is preset in a zero cold water mode0The temperature of the water detected by the temperature sensor 61 is TW。
Cold water is input into the first cold water pipe section 40 through the water inlet pipe 42, the stop valve 25 and the water pump 41 are opened, and the water flow sensor detects a water flow signal; cold water is input into the heat exchange assembly 30 through the first cold water pipe segment 40, is heated through the heat exchange assembly 30 and is output to the first hot water pipe segment 60, hot water in the first hot water pipe segment 60 is conveyed to the second tee 23 through the first tee 21, the one-way check valve 22 and the stop valve 25, is input into the first cold water pipe segment 40 again, and forms a water circulation loop until the water temperature T of the water heated and output through the heat exchange assembly 30W>T0The water pump 41 is stopped.
The hot water output by the first hot water pipe section 60 is output to the mixing valve 16 through the first tee joint 21 and is output to the shower head 15 or other output structure.
When the stop valve 25 is closed and the water pump 41 is opened, cold water is input into the heat exchange assembly 30 through the first cold water pipe section 40, heated by the heat exchange assembly 30 and then conveyed to the combination type one-way check valve 20 through the first hot water pipe section 60, and during the continuous operation of the water pump 41, the water pressure in the system is continuously increased, so that the pressure boosting mode is performed in the hot water system.
The stop valve 25 of the combined check valve 20 is normally closed, and in the pressurization mode, the water flow L of the first cold water pipe section 40 is presetOWhen the water pump 41 is in operation, the water flow sensor 43 detects a water flow signal, and the water flow detected by the water flow sensor 43 is LWWhen L is presentW>LOWhen the water pressure in the first cold water pipe section 40 reaches a preset range, the water pump 41 is stopped.
According to the scheme, when the stop valve 25 is closed, the system is in the pressurization mode, when the stop valve 25 is opened, the system is in the zero-cold-water mode, and the state of the stop valve 25 is adjusted, so that the corresponding zero-cold-water mode and the pressurization mode can be formed in the hot water system respectively, and the two modes are integrated in the same system. A user purchases a water heater, the zero-cold-water and pressurization functions are combined, and the technical problem that the zero-cold-water and pressurization functions of the existing water heater product can be selected only by one is solved.
The heat exchange assembly 30 may adopt an electric heating structure or a gas heating structure, and in one embodiment of the present invention, the heat exchange assembly 30 includes a heat exchanger 31, a gas pipeline 32, and a gas valve 33 disposed on the gas pipeline 32; the gas pipeline 32 is connected with the heat exchanger 31; the first cold water pipe segment 40 is communicated with the input end of the heat exchanger 31, and the first hot water pipe segment 60 is communicated with the output end of the heat exchanger 31. The gas valve 33 is opened, gas is supplied from the gas pipe 32 to the heat exchanger 31, and cold water is heated and then supplied to the first hot water pipe section 60.
In order to facilitate installation of the hot water system, in one embodiment of the present invention, the hot water system further includes a water heater body 10, and the heat exchange assembly 30, the first cold water pipe segment 40, the water pump 41, the water flow sensor 43, the first hot water pipe segment 60, and the temperature sensor 61 are disposed inside the water heater body 10. The water heater body 10 serves as a housing structure of the hot water system.
A cold water inlet joint 11 may be provided on the water heater body 10 for connecting the first cold water pipe segment 40, and the water inlet pipe 42 and the cold water inlet joint 11 are used for inputting cold water to the first cold water pipe segment 40.
A hot water outlet joint 13 may be disposed on the water heater body 10 for connecting the first hot water pipe section 60, and the combination type one-way check valve 20 may be disposed inside the water heater body 10 or outside the water heater body 10.
When a gas heating mode is adopted, a gas inlet joint 12 can be arranged on the water heater body 10 and used for connecting the gas pipeline 32.
In order to facilitate centralized control of the above components, in this embodiment, optionally, a controller 13 is disposed in the water heater body 10, and the heat exchange assembly 30, the water pump 41, the water flow sensor 43, and the temperature sensor 61 are electrically connected to the controller 13, respectively. The controller 13 controls the heat exchange assembly 30, the water pump 41, the water flow sensor 43 and the temperature sensor 61, the water flow sensor 43 detects a water flow signal and sends the water flow signal to the controller 13, the controller 13 receives the water flow signal and controls the water pump 41 to start up, so that the water pump 41 pumps water into the heat exchange assembly 30, the temperature sensor 61 detects temperature data and sends the temperature data to the controller 13, and the controller 13 determines whether to turn off the water pump 41 according to the detected temperature data. The control software of the controller 13 may be implemented by the prior art, and is not described in detail.
When the stop valve 25 adopts a manual stop valve 25, the stop valve 25 is controlled independently; when the stop valve 25 is an electromagnetic valve, the control chip of the stop valve 25 can be integrated with the controller 13 to perform integrated control.
When the controller 13 is used to control the on/off of the stop valve 25, in this embodiment, optionally, the stop valve 25 is connected to the controller 13 in a wired or wireless manner. The stop valve 25 may be wired to electrically connect the stop valve 25 to the controller 13; wireless connections may also be used.
The connection mode of the stop valve 25 and the controller 13 can be determined according to the installation position of the combination check valve 20, and when the combination check valve 20 is arranged outside the water heater body 10, the stop valve 25 and the controller 13 can be connected wirelessly to reduce the external wiring of the water heater body 10; when the combination check valve 20 is disposed inside the water heater body 10, the stop valve 25 and the controller 13 may be connected by wire or wirelessly.
Referring to fig. 4, fig. 4 is a schematic view of a hot water system with a water return pipe according to an embodiment of the present invention, in which the first cold water pipe section 40 is connected to the second tee 23 through a water return pipe 80. The water return pipe 80 is used as a connection pipeline between the combined check valve 22 and the first cold water pipe segment 40, when the hot water system is in a zero cold water state, water is circulated into the heat exchange assembly 30 through the water return pipe 80 to be heated, and when a user uses water, hot water can be directly output.
In this embodiment, the first cold water pipe segment 40 is optionally connected to the mixing valve 16 via a second cold water pipe segment 50. At this time, one end of the second tee 23 is closed by the blocking cover 24, so that the second tee 23 is connected only with the stop valve and the water return pipe 80. The combined one-way check valve 22, the water return pipe 80, the first cold water pipe segment 40, the heat exchange assembly 30 and the first hot water pipe segment 60 form a hot water circulation pipeline, and the second cold water pipe segment 50 is used for conveying cold water to the water mixing valve 16, so that a user can conveniently adjust the output water temperature according to needs.
In one embodiment of the present invention, the end of the second three-way pipe 23 away from the first cold water pipe segment 40 is connected to the mixing valve 16. When the temperature of the hot water in the first hot water pipe segment 60 is higher than the preset temperature, the cold water can be delivered from the water inlet pipe 42 to the direction of the mixing valve 16 through the second tee 23, and the water temperature can be adjusted through mixing of the mixing valve 16, so as to meet different temperature requirements.
When the hot water system is arranged inside the water heater body 10 and the combined one-way check valve 22 is arranged on the outer wall of the water heater body 10, the water return pipe 80 and the second cold water pipe section 50 can be arranged outside the water heater body 10, the water return pipe 80 can be connected to the cold water inlet joint 11, the second hot water pipe section 70 is arranged outside the water heater body 10, the first hot water pipe section 60 is connected with the first tee joint 21 through the second hot water pipe section 70, and at this time, the second hot water pipe section 70 is connected with the hot water inlet joint.
According to the invention, through the structural form, a centralized zero-cold-water mode and a pressurization mode in one system can be realized, two independent systems do not need to be designed according to the two modes, two functions can be realized on the same platform, the cost is saved, and the space utilization rate of the water heater is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The utility model provides a combined one-way check valve which characterized in that, includes first tee bend and second tee bend, first tee bend and second tee bend are connected through one-way check valve, the second tee bend with be equipped with the stop valve between the one-way check valve.
2. A hot water system comprising a heat exchange assembly, a first cold water section, a water pump, a water flow sensor, a first hot water section, a temperature sensor, a mixing valve, and the combination one-way check valve of claim 1;
a water inlet pipe is arranged on the first cold water pipe section, the first cold water pipe section is communicated with the input end of the heat exchange assembly, and the first hot water pipe section is communicated with the output end of the heat exchange assembly;
the water pump and the water flow sensor are arranged on the first cold water pipe section;
the temperature sensor is arranged on the first hot water pipe section;
one end, far away from the heat exchange assembly, of the first hot water pipe section is communicated with the water mixing valve through the first tee joint;
and one end of the first cold water pipe section, which is far away from the heat exchange assembly, is connected with the second tee joint.
3. The water heating system according to claim 2, wherein the first cold water pipe section is connected to the second tee through a return pipe.
4. The water heating system as claimed in claim 2, wherein an end of the second tee remote from the first cold water pipe segment is connected to the mixing valve.
5. The water heating system according to claim 4, wherein the first cold water pipe segment is connected to the mixing valve via a second cold water pipe segment.
6. The water heating system according to claim 2, wherein the first hot water pipe segment is connected to the first tee joint by a second hot water pipe segment.
7. The water heating system according to any one of claims 2 to 6, wherein the heat exchange assembly comprises a heat exchanger, a gas conduit, and a gas valve disposed on the gas conduit;
the gas pipeline is connected with the heat exchanger;
the first cold water pipe section is communicated with the input end of the heat exchanger, and the first hot water pipe section is communicated with the output end of the heat exchanger.
8. The hot water system as claimed in any one of claims 2 to 6, wherein the hot water system further comprises a water heater body, and the heat exchange assembly, the first cold water pipe section, the water pump, the water flow sensor, the first hot water pipe section and the temperature sensor are arranged inside the water heater body.
9. The water heating system as claimed in claim 8, wherein a controller is provided in the water heater body, and the heat exchange assembly, the water pump, the water flow sensor and the temperature sensor are electrically connected with the controller respectively.
10. The water heating system of claim 9, wherein the shut-off valve is wired or wirelessly connected to the controller.
CN201911111307.8A 2019-11-13 2019-11-13 Combined one-way check valve and hot water system Pending CN110657298A (en)

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CN112483684A (en) * 2020-11-30 2021-03-12 宁波方太厨具有限公司 Water mixing valve and hot water circulation system comprising same
CN112524290A (en) * 2020-11-30 2021-03-19 宁波方太厨具有限公司 Self-adjusting check valve assembly of circulating water heater and zero-cold-water gas water heater system
CN114353328A (en) * 2020-09-28 2022-04-15 青岛经济技术开发区海尔热水器有限公司 Prevent scalding subassembly and electric water heater

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CN114353328A (en) * 2020-09-28 2022-04-15 青岛经济技术开发区海尔热水器有限公司 Prevent scalding subassembly and electric water heater
CN112483684A (en) * 2020-11-30 2021-03-12 宁波方太厨具有限公司 Water mixing valve and hot water circulation system comprising same
CN112524290A (en) * 2020-11-30 2021-03-19 宁波方太厨具有限公司 Self-adjusting check valve assembly of circulating water heater and zero-cold-water gas water heater system

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Application publication date: 20200107