CN108195059A - Zero cold water gas heater, system and anti-dry method - Google Patents
Zero cold water gas heater, system and anti-dry method Download PDFInfo
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- CN108195059A CN108195059A CN201711499831.8A CN201711499831A CN108195059A CN 108195059 A CN108195059 A CN 108195059A CN 201711499831 A CN201711499831 A CN 201711499831A CN 108195059 A CN108195059 A CN 108195059A
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- water
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- water inlet
- gas heater
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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
- F24H1/0027—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a kind of zero cold water gas heater, system and anti-dry method, the zero cold water gas heater includes heat exchanger, and the water inlet end of the heat exchanger is connected with cold water inlet, and the water outlet of the heat exchanger is connected with hot water outlet pipe；The zero cold water gas heater further includes water circulating pump, pump water inlet and pumping line, the first end of the pump water inlet connects the water inlet end of the water circulating pump, and the second end of the pump water inlet is connected to the hot water outlet pipe above and forms the first connecting node with the hot water outlet pipe；The first end of the pumping line connects the water outlet of the water circulating pump, and the second end of the pumping line is connected on the cold water inlet and forms the second connecting node with the cold water inlet；The zero cold water gas heater further includes controller, water route detection device and temperature sensor.The present invention has the advantages that simple in structure and safe and reliable etc..
Description
Technical field
The present invention relates to gas utensil technical field more particularly to a kind of zero cold water gas heater and application zero cold water combustions
The zero cold water gas heater system and anti-dry method of gas water heater.
Background technology
This shortcoming of tap water can be flowed out first with water spot when in use in order to solve gas heater, occurred at present
Water circulating pump including water circulating pump and cold water pipeline section and hot water pipeline section, is usually assemblied in cold water by zero cold water gas heater
Pipeline section, in this way assembling heat exchanger can be made the risk of dry combustion method occur, also there are it is complicated and of high cost the shortcomings that.In addition, it passes
Hydraulic pressure in zero cold water gas heater system of system in user's point and zero cold water gas heater pipeline is not sufficiently stable, and can be caused
The control program of zero cold water water heater is complicated, and sequential operation easily malfunctions and causes water heater working unstable.
Invention content
It is a primary object of the present invention to provide a kind of zero cold water gas heater, system and anti-dry method, it is intended to solve
Certainly existing zero cold water heat exchanger in gas water heater will appear the risk of dry combustion method and existing zero cold water gas heater structure
The problem of complicated.
To achieve the above object, a kind of zero cold water gas heater provided by the invention includes：
Heat exchanger, the water inlet end of the heat exchanger are connected with cold water inlet, and the water outlet of the heat exchanger connects
It is connected to hot water outlet pipe；
Water circulating pump, pump water inlet and pumping line, the first end of the pump water inlet connect the cycle
The water inlet end of water pump, it is upper and tubular with the hot water effluent that the second end of the pump water inlet is connected to the hot water outlet pipe
Into the first connecting node, the hot water outlet pipe is divided into first hot water effluent's pipeline section and second hot water effluent's pipeline section, institute
State the water outlet that first hot water effluent's pipeline section connects the heat exchanger；The first end of the pumping line connects the cycle
The water outlet of water pump, the second end of the pumping line be connected on the cold water inlet and with the cold water inlet shape
Into the second connecting node, the cold water outlet pipe is divided into the first cold water inlet section and the second cold water inlet section, institute
State the water inlet end that the first cold water inlet section connects the heat exchanger；
Controller, water route detection device and temperature sensor, the water route detection device, the temperature sensor and
The water circulating pump is electrically connected with the controller；The water route detection device is used to detect the water inlet end of the heat exchanger
Streamflow regime, the temperature sensor is used to detect the water flow temperature of the water outlet of the heat exchanger, and the controller is used
Start according to the streamflow regime control water circulating pump, and for controlling the water circulating pump according to the water flow temperature
It closes.
Preferably, one way stop peturn valve is installed on the pump water inlet, so that flow can only be from the pump water inlet
Flow to the water circulating pump.
Preferably, the temperature sensor is mounted on the first hot water effluent pipeline section.
Preferably, the water route detection device is mounted in the first cold water inlet section.
Preferably, the water route detection device is water flow sensor.
Preferably, the water route detection device is hydraulic pressure switch.
Preferably, the water outlet of the hot water outlet pipe is connected with hot water effluent's connector.
Preferably, the water inlet end of the cold water inlet is connected with cold water water supply connector.
The present invention also provides a kind of zero cold water gas heater system, including zero cold water combustion gas such as described in any one of the above embodiments
Water heater, for connecting external water source, the hot water outlet pipe is used to connect spray head or tap the cold water inlet.
The present invention also provides a kind of anti-dry method applied to the zero cold water gas heater system, including walking as follows
Suddenly：
For the zero cold water gas heater when opening, the water route detection device detects the first cold water inlet section
Streamflow regime and output pulse signal to the controller；
The controller return pulse signal, and judge whether streamflow regime meets preset condition；When water-flow signal meets
During preset condition, the controller controls the water circulating pump to start；
The temperature sensor detects the water flow temperature of the first hot water effluent pipeline section and exports electric signal to the control
Device processed；
The controller receives electric signal, and judges whether water flow temperature is more than or equal to default water flow temperature；When flow temperature
When degree is more than or equal to default water flow temperature, the controller controls the water circulating pump to close；When water flow temperature is less than default water
It when flowing temperature, then returns to the controller and receives electric signal, and judge whether water flow temperature is more than or equal to default water flow temperature
Step.
In the inventive solutions, zero cold water gas heater is in warm-up phase, controller control loop water pump
After unlatching, shape between cold water inlet, heat exchanger, hot water outlet pipe, pump water inlet, water circulating pump and pumping line
Into water circulation heating tube, the warm of cold water is realized.After the completion of warm, water circulating pump is closed, cold water inlet,
Heating pipeline is formed between heat exchanger, hot water outlet pipe.Zero cold water gas heater of the invention makes in warm-up phase and normally
With in the process, remaining in heat exchanger has flow to pass through, and can prevent heat exchanger from the risk of dry combustion method occur, ensures heat exchange
The normal work of device, securely and reliably, and the zero cold water gas heater also have it is simple in structure, be easy to make and it is at low cost
Advantage.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Structure according to these attached drawings obtains other attached drawings.
Fig. 1 is the structure diagram of zero cold water gas heater of one embodiment of the invention；
Fig. 2 is the structure diagram of zero cold water gas heater of another embodiment of the present invention；
Fig. 3 is the flow diagram of an embodiment of the anti-dry method of zero cold water gas heater of the invention；
Fig. 4 is the structure diagram of zero cold water gas heater system of the embodiment of the present invention.
Drawing reference numeral explanation：
The object of the invention is realized, the embodiments will be further described with reference to the accompanying drawings for functional characteristics and advantage.
Specific embodiment
Below in conjunction with the attached drawing in the present embodiment, the technical solution in the present embodiment is clearly and completely described,
Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts,
It shall fall within the protection scope of the present invention.
It is to be appreciated that the directional instruction (such as up, down, left, right, before and after ...) of institute is only used for solving in the present embodiment
Relative position relation, motion conditions under a certain particular pose (as shown in drawings) between each component etc. are released, if this is specific
When posture changes, then directionality instruction also correspondingly changes correspondingly.
In addition, in the present invention such as relating to the description of " first ", " second " etc. be only used for description purpose, and it is not intended that
Indicate or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Define as a result, " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In the description of the present invention, " multiple " contain
Justice is at least two, such as two, three etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " etc. should be interpreted broadly,
For example, " fixation " can be fixedly connected or be detachably connected or integral；Can be mechanical connection or
Electrical connection；It can be directly connected, can also be indirectly connected by intermediary, can be the connection inside two elements or two
The interaction relationship of a element, unless otherwise restricted clearly.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, the technical solution between each embodiment of the present invention can be combined with each other, but must be general with this field
Logical technical staff can be implemented as basis, will be understood that when the combination appearance of technical solution is conflicting or can not realize this
The combination of technical solution is not present, also not the present invention claims protection domain within.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As depicted in figs. 1 and 2, zero cold water gas heater 100 provided by the invention includes heat exchanger 1, heat exchanger 1
Water inlet end be connected with cold water inlet 2, the water outlet of heat exchanger 1 is connected with hot water outlet pipe 3；Zero cold water gas heater
100 further include water circulating pump 4, pump water inlet 5 and pumping line 6, the first end connection water circulating pump of pump water inlet 5
4 water inlet end, the second end of pump water inlet 5, which is connected on hot water outlet pipe 3 and forms first with hot water outlet pipe 3, connect section
Point 30, hot water outlet pipe 3 is divided into first hot water effluent's pipeline section 31 and second hot water effluent's pipeline section 32 by the first connecting node 30,
First hot water effluent's pipeline section 31 connects the water outlet of heat exchanger 1；The first end connection water circulating pump 4 of pumping line 6 goes out
Water end (W.E.), the second end of pumping line 6 are connected on cold water inlet 2 and form the second connecting node 20 with cold water inlet 2,
Cold water inlet 2 is divided into the first cold water inlet section 21 and the second cold water inlet section 22 by the second connecting node 20, and first
Cold water inlet section 21 connects the water inlet end of heat exchanger 1.
Zero cold water gas heater 100 of the present embodiment in warm-up phase, cold water by the water inlet end of cold water inlet 2 according to
It is secondary to be opened into the second cold water inlet section 22 and the first cold water inlet section 21, water circulating pump 4, the first cold water inlet section 21
In cold water exchanged heat by heat exchanger 1 after become and warm water and flow into first hot water effluent's pipeline section 31, flow to the first connection
Pump water inlet 5 is pumped by water circulating pump 4 when at node 30, then by inflow pumping line 6 after water circulating pump 4, then from
Enter the progress heat exchange of heat exchanger 1 after the first cold water inlet section 21 is flowed at second connecting node 20, that is, water circulating pump
After 4 open, the first cold water inlet section 21, heat exchanger 1, first hot water effluent's pipeline section 31, pump water inlet 5, water circulating pump 4
And water circulation heating tube is formed between pumping line 6, realize the warm of cold water.After the completion of warm, follow
Ring water pump 4 is closed, cold water from 2 inflow heat exchanger 1 of cold water inlet heated after directly from the water outlet of hot water outlet pipe 3
Outflow, for user's normal use, that is, after water circulating pump 4 is closed, between cold water inlet 2, heat exchanger 1, hot water outlet pipe 3
Form heating pipeline.
In the present embodiment, zero cold water gas heater 100 further includes controller 7, water route detection device and temperature sensing
Device 8, water route detection device, temperature sensor 8 and water circulating pump 4 are electrically connected with controller 7；Water route detection device is used to examine
The streamflow regime of the water inlet end of calorimetric exchanger 1, temperature sensor 8 are used to detect the water flow temperature of the water outlet of heat exchanger 1,
Controller 7 is used to be closed according to water flow temperature control loop water pump 4 for according to streamflow regime control loop water pump 4 being started.
Specifically, one section of hot water outlet pipe 3 between 1 and first connecting node 30 of heat exchanger is the first hot water outlet pipe
Section 31, temperature sensor 8 are mounted on first hot water effluent's pipeline section 31.One between 1 and second connecting node 20 of heat exchanger
Section cold water inlet 2 is the first cold water inlet section 21, and water route detection device is mounted in the first cold water inlet section 21.
The present embodiment water route detection device can be water flow sensor 9 or hydraulic pressure switch 10, it is preferred to use water flow passes
Sensor 9.It should be understood that the prior art can be used in the water flow sensor 9 and hydraulic pressure switch 10 of the present embodiment.
As shown in figure 3, the anti-dry method of zero cold water gas heater 100 of the present embodiment, includes the following steps：
S1：When zero cold water gas heater 100 is opened, water flow sensor 9 detects the first cold water inlet section 21
Streamflow regime and output pulse signal are to controller 7；
S2：7 return pulse signal of controller, and judge whether streamflow regime meets preset condition；
S3：When water-flow signal meets preset condition, 7 control loop water pump 4 of controller starts；
S4：Temperature sensor 8 detects the water flow temperature of first hot water effluent's pipeline section 31 and exports electric signal to controller 7；
S5：Controller 7 receives electric signal, and judges whether water flow temperature is more than or equal to default water flow temperature；
S6：When water flow temperature is more than or equal to default water flow temperature, 7 control loop water pump 4 of controller is closed；
S7：When water flow temperature is less than default water flow temperature, then return to step S5.
Detailed process is：Zero cold water gas heater 100 is opened, cold water enters cold water inlet 2, water flow sensor 9
It detects the streamflow regime of the first cold water inlet section 21 and output pulse signal is to controller 7,7 return pulse signal of controller,
And judge whether streamflow regime meets preset condition by sequential operation；When water-flow signal meets preset condition, controller 7
Control loop water pump 4 starts, into warm-up phase；Cold water flows into hot water inlet pipe, temperature sensing after being heated by heat exchanger 1
Device 8 detects the water flow temperature of first hot water effluent's pipeline section 31 and exports electric signal to controller 7；Controller 7 receives electric signal, and
Judge whether the water flow temperature is more than or equal to default water flow temperature；When water flow temperature is more than or equal to default water flow temperature, control
7 control loop water pump 4 of device is closed；When water flow temperature is less than default water flow temperature, then continue to judge whether water flow temperature is more than
Equal to default water flow temperature.
By setting water flow sensor 9 in the first cold water inlet section 21 and being set on first hot water effluent's pipeline section 31
Put temperature sensor 8 so that controller 7 only need to be according to the pulse data signal that water flow sensor 9 is sent come control loop water
The startup of pump 4, and the electrical signal data sent according to temperature sensor 8 is come the closing of control loop water pump 4,7 program of controller
Deterministic process is simply clear, is less prone to mistake, so can accurately control loop water pump 4 startup and closing, ensure that zero is cold
100 steady operation of water gas heater.
It should be noted that the preset condition of the present embodiment can be the data of the preset in advance on controller 7, than being pre-
If water flow data.Similarly, the default water flow temperature of the present embodiment can be the water flow temperature of user's preset in advance, for example,
Default water flow temperature TOIt represents, the temperature T that temperature sensor 8 detectsWIt represents, works as TW≥TOWhen, 7 control loop of controller
Water pump 4 is closed, and works as TW＜ TOWhen, water circulating pump 4 is persistently opened until TW≥TOCondition set up.It should be understood that the present embodiment
TOCan be depending on human sense of comfort be experienced, such as TO=42 DEG C.
Zero cold water gas heater 100 of the present embodiment remains heat exchange during warm-up phase and normal use
There is flow to pass through in device 1, can prevent heat exchanger 1 from the risk of dry combustion method occur, ensure the normal work of heat exchanger 1, safely may be used
Lean on, and the zero cold water gas heater 100 also have the advantages that it is simple in structure, be easy to make and it is at low cost.
As depicted in figs. 1 and 2, in the present embodiment, one way stop peturn valve 51 is installed on pump water inlet 5, so that flow is only
Water circulating pump 4 can be flowed to from pump water inlet 5.One way stop peturn valve 51 can prevent flow from flowing backwards, i.e., flow cannot be from water circulating pump 4
Pump water inlet 5 is flowed to, ensures the flow normal flow in water circulation heating tube, and then ensure zero cold water gas heater
100 normal works.It should be understood that the prior art may be used in the one way stop peturn valve 51 of the present embodiment, have and be easy to materials
Advantage.
In the present embodiment, the water outlet of hot water outlet pipe 3 is connected with hot water effluent's connector 33, conducive to hot water outlet pipe 3 with
User's point connects.One section of hot water outlet pipe 3 between first connecting node 30 and hot water effluent's connector 33 is the second hot water effluent
Pipeline section 32.Further, the water inlet end of cold water inlet 2 is connected with cold water water supply connector 23, conducive to cold water inlet 2 and outside
Water source connects.One section of cold water inlet 2 between second connecting node 20 and cold water water supply connector 23 is the second cold water inlet
Section 22.It should be understood that the heat exchanger 1 of the present embodiment is connected with gas inlet pipe 11, gas inlet pipe 11 is equipped with combustion gas
Valve 12, the inlet end of gas inlet pipe 11 are connected with gas inlet connector 13, are connect conducive to outer combustion gas source.
As shown in figure 4, the present invention also proposes a kind of zero cold water gas heater system, including above-mentioned zero cold water combustion gas heat
Hydrophone 100, for connecting external water source, hot water outlet pipe 3 is used to connect spray head 200 or tap cold water inlet 2.With
Before family carries out bath water, water circulating pump 4 is opened, and zero cold water gas heater 100 carries out warm, when cold water is heated to
When meeting bathroom temperature set by user, water circulating pump 4 is closed, and hot water outlet pipe 3 is normally discharged, and passes through pipeline and send hot water
To spray head 200 or tap, for user's normal use.Due to zero cold water gas heater, 100 system employ it is above-mentioned
Whole technical solutions of all embodiments, thus it is all beneficial to effect at least caused by the technical solution with above-described embodiment
Fruit, this is no longer going to repeat them.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of zero cold water gas heater, which is characterized in that including：
Heat exchanger, the water inlet end of the heat exchanger are connected with cold water inlet, and the water outlet of the heat exchanger is connected with
Hot water outlet pipe；
Water circulating pump, pump water inlet and pumping line, the first end of the pump water inlet connect the water circulating pump
Water inlet end, it is upper and form the with the hot water outlet pipe that the second end of the pump water inlet is connected to the hot water outlet pipe
The hot water outlet pipe is divided into first hot water effluent's pipeline section and second hot water effluent's pipeline section by one connecting node, and described
One hot water effluent's pipeline section connects the water outlet of the heat exchanger；The first end of the pumping line connects the water circulating pump
Water outlet, the second end of the pumping line is connected on the cold water inlet and forms the with the cold water inlet
The cold water outlet pipe is divided into the first cold water inlet section and the second cold water inlet section by two connecting nodes, and described
One cold water inlet section connects the water inlet end of the heat exchanger；
Controller, water route detection device and temperature sensor, the water route detection device, the temperature sensor and described
Water circulating pump is electrically connected with the controller；The water route detection device is used to detect the water of the water inlet end of the heat exchanger
Stream mode, the temperature sensor are used to detect the water flow temperature of the water outlet of the heat exchanger, and the controller is used for root
The water circulating pump is controlled to start according to the streamflow regime, and for the water circulating pump being controlled to close according to the water flow temperature
It closes.
2. zero cold water gas heater according to claim 1, which is characterized in that be equipped with list on the pump water inlet
To check-valves, so that flow can only flow to the water circulating pump from the pump water inlet.
3. zero cold water gas heater according to claim 1, which is characterized in that the temperature sensor is mounted on described
On first hot water effluent's pipeline section.
4. zero cold water gas heater according to claim 1, which is characterized in that the water route detection device is mounted on institute
It states in the first cold water inlet section.
5. zero cold water gas heater according to claim 1, which is characterized in that the water route detection device is water flow
Sensor.
6. zero cold water gas heater according to claim 1, which is characterized in that the water route detection device is opened for hydraulic pressure
It closes.
7. the zero cold water gas heater according to any one of claim 1-6, which is characterized in that the hot water outlet pipe
Water outlet be connected with hot water effluent's connector.
8. the zero cold water gas heater according to any one of claim 1-6, which is characterized in that the cold water inlet
Water inlet end be connected with cold water water supply connector.
9. a kind of zero cold water gas heater system, which is characterized in that cold including zero as described in any one of claim 1-8
Water gas heater, for connecting external water source, the hot water outlet pipe is used to connect spray head or water the cold water inlet
Tap.
10. a kind of anti-dry method of zero cold water gas heater system applied to claim 9, which is characterized in that including
Following steps:
For the zero cold water gas heater when opening, the water route detection device detects the water of the first cold water inlet section
Stream mode and output pulse signal are to the controller；
The controller return pulse signal, and judge whether streamflow regime meets preset condition；When water-flow signal meet it is default
During condition, the controller controls the water circulating pump to start；
The temperature sensor detects the water flow temperature of the first hot water effluent pipeline section and exports electric signal to the controller；
The controller receives electric signal, and judges whether water flow temperature is more than or equal to default water flow temperature；When water flow temperature is big
When equal to default water flow temperature, the controller controls the water circulating pump to close；When water flow temperature is less than default flow temperature
It when spending, then returns to the controller and receives electric signal, and the step of whether water flow temperature is more than or equal to default water flow temperature judged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499831.8A CN108195059A (en) | 2017-12-29 | 2017-12-29 | Zero cold water gas heater, system and anti-dry method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711499831.8A CN108195059A (en) | 2017-12-29 | 2017-12-29 | Zero cold water gas heater, system and anti-dry method |
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| Publication Number | Publication Date |
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| CN108195059A true CN108195059A (en) | 2018-06-22 |
Family
ID=62587859
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711499831.8A Pending CN108195059A (en) | 2017-12-29 | 2017-12-29 | Zero cold water gas heater, system and anti-dry method |
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Cited By (8)
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| CN109297181A (en) * | 2018-11-12 | 2019-02-01 | 盐城市旺科电子技术有限公司 | Immediately heating water heater |
| CN109442732A (en) * | 2018-12-15 | 2019-03-08 | 成都前锋电子有限责任公司 | A kind of zero cold water gas heater system with water circulating pump |
| CN109539567A (en) * | 2018-12-03 | 2019-03-29 | 马鞍山金顺来工业设计有限公司 | A kind of temperature control equipment and method of gas heater |
| CN110186198A (en) * | 2019-05-22 | 2019-08-30 | 华帝股份有限公司 | Waterway system of dual-purpose gas water heater, gas water heater and control method of gas water heater |
| CN110657298A (en) * | 2019-11-13 | 2020-01-07 | Tcl家用电器（中山）有限公司 | Combined one-way check valve and hot water system |
| CN113137760A (en) * | 2020-01-19 | 2021-07-20 | 芜湖美的厨卫电器制造有限公司 | Water heater waterway system and water heater |
| CN113339994A (en) * | 2021-06-15 | 2021-09-03 | 珠海格力电器股份有限公司 | Gas water heater, control method and control device thereof |
| CN113686014A (en) * | 2021-09-08 | 2021-11-23 | 华帝股份有限公司 | Water heater and control method |
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| CN109442732A (en) * | 2018-12-15 | 2019-03-08 | 成都前锋电子有限责任公司 | A kind of zero cold water gas heater system with water circulating pump |
| CN110186198A (en) * | 2019-05-22 | 2019-08-30 | 华帝股份有限公司 | Waterway system of dual-purpose gas water heater, gas water heater and control method of gas water heater |
| CN110657298A (en) * | 2019-11-13 | 2020-01-07 | Tcl家用电器（中山）有限公司 | Combined one-way check valve and hot water system |
| CN113137760A (en) * | 2020-01-19 | 2021-07-20 | 芜湖美的厨卫电器制造有限公司 | Water heater waterway system and water heater |
| CN113137760B (en) * | 2020-01-19 | 2022-06-14 | 芜湖美的厨卫电器制造有限公司 | Water heater waterway system and water heater |
| CN113339994A (en) * | 2021-06-15 | 2021-09-03 | 珠海格力电器股份有限公司 | Gas water heater, control method and control device thereof |
| CN113686014A (en) * | 2021-09-08 | 2021-11-23 | 华帝股份有限公司 | Water heater and control method |
| CN113686014B (en) * | 2021-09-08 | 2022-10-14 | 华帝股份有限公司 | Water heater and control method |
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Application publication date: 20180622 |