CN108469118A - A kind of the water supply of water heater system and control method of postposition circulating pump - Google Patents
A kind of the water supply of water heater system and control method of postposition circulating pump Download PDFInfo
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- CN108469118A CN108469118A CN201810195562.4A CN201810195562A CN108469118A CN 108469118 A CN108469118 A CN 108469118A CN 201810195562 A CN201810195562 A CN 201810195562A CN 108469118 A CN108469118 A CN 108469118A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 292
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000000523 sample Substances 0.000 claims description 20
- 238000007710 freezing Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 7
- 239000002737 fuel gas Substances 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract 1
- 230000002528 anti-freeze Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- 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
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners 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)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
The invention discloses a kind of water supply of water heater system of postposition circulating pump and control methods, the control system includes shell, the burner for being provided with heat exchanger in the shell and heat exchanger being heated, the cold water inlet and hot water outlet being connected with the heat exchanger are provided on the shell, it is provided with circulating pump on the pipeline that the water outlet of the heat exchanger is connected to the hot water outlet, the controller being electrically connected respectively with circulating pump and burner is additionally provided in the shell.The circulating pump of the present invention is arranged at hot water outlet end, reduces installation part, and simple in structure, energy consumption is small, saves cost.
Description
【Technical field】
The present invention relates to domestic gas instantaneous water heater technical field, especially a kind of water supply of water heater of postposition circulating pump
System and control method.
【Background technology】
The gas instantaneous water heater of common household installation is opening water supply valve, is burning to Water heater igniting, gone out with water spot
Required leaving water temperature will wait for one section of longer time.It during this period of time needs to release a large amount of ponding in pipeline.For
With water spot apart from water heater farther out, two or more places with water spot are especially installed, waste water resource shows
As more serious, the circulating line of parts and outside in water heater can lead to bursting by freezing because of low temperature.This water heater, user
It uses and feels extremely inconvenient, especially use hot water every time, be intended to waste a large amount of water resource.
The present invention researchs and proposes in view of the deficiencies of the prior art.
【Invention content】
The technical problem to be solved in the present invention is to provide a kind of water supply of water heater system of postposition circulating pump and control methods.
In order to solve the above technical problems, the present invention provides a kind of water supply of water heater system of postposition circulating pump, including shell
Body, the burner for being provided with heat exchanger and being heated to heat exchanger in the shell are provided with and the heat on the shell
The cold water inlet and hot water outlet that exchanger is connected, which is characterized in that the water outlet of the heat exchanger goes out with the hot water
It is provided with circulating pump on the pipeline of mouth connection, the control being electrically connected respectively with circulating pump and burner is additionally provided in the shell
Device.
A kind of water supply of water heater system of postposition circulating pump as described above, which is characterized in that the heat exchanger into
The water inlet temperature-sensing probe and water flow sensor being electrically connected respectively with temperature controller are provided on the pipeline that water pipe is connected to cold water inlet；
It is provided on the pipeline that the outlet pipe of the heat exchanger is connected to the water inlet pipe of circulating pump electric with temperature controller respectively
Temperature controller even and water outlet temperature-sensing probe.
A kind of water supply of water heater system of postposition circulating pump as described above, which is characterized in that set at the cold water inlet
It is equipped with relief valve and inlet valve.
A kind of water supply of water heater system of postposition circulating pump as described above, which is characterized in that be provided on the shell
The fuel gas inlet communicated with the burner；It is additionally provided on shell and is connected with burner and the gas in burner is discharged
Smoke exhaust pipe.
A kind of water supply of water heater system of postposition circulating pump as described above, which is characterized in that the burner and combustion gas
It is provided with proportioning valve on the pipeline of inlet communication.
A kind of water supply of water heater system of postposition circulating pump as described above, which is characterized in that also set up on the shell
There is attaching plug.
The present invention also provides a kind of control methods of the water supply of water heater system of postposition circulating pump, wherein the shell
On be additionally provided with the manipulation input button being electrically connected with the controller, which is characterized in that be equipped with for receiving signal in controller
And the automatically controlled program executed, the automatically controlled program include button preheating mode program, water control triggers preheating mode program and antifreeze
Model program；
Under button preheating mode program, controller starts circulating pump, and water flow sensor detects water-flow signal and anti-
It feeds controller, when water outlet temperature-sensing probe detects that pipeline water temperature is less than setting water temperature T 1, starts burner heating, when detecting
When pipeline water temperature reaches the setting heating temperature of button pipeline start up by preheating pattern, burner stops heating；
Water control triggers preheating mode program：Water flow sensor detects water-flow signal twice in succession, while being discharged temperature-sensitive
Probe detect pipeline water temperature be less than set temperature T1 when, start burner heating, when detect pipeline water temperature reach water control touch
When sending out the setting heating temperature of preheating mode, burner stops heating；
Under anti-freezing pattern program, when water inlet temperature-sensing probe or water outlet temperature-sensing probe detect that pipeline water temperature is less than T2, open
Dynamic circulating pump operating, while starting burner heating, when detecting that pipeline water temperature reaches the setting heating temperature of anti-freezing pattern,
Stop heating, 0 DEG C of ＜ T2 ＜ T1.
Compared with prior art, the water supply of water heater system and control method of a kind of postposition circulating pump of the invention, tool
It has the following advantages：
1, the effect of plug and play hot water may be implemented:
After system starts " button startup " pattern or " water control triggering " preheating mode, 10 seconds or so, opening penstock,
Can the suitable hot water of temperature in use, it is quick and easy.
2, there is multiple spot water supply function:
The water heater of this system configuration, supplying hot water energy rate, can be with substantially in 12L/min or more, category, the big above capacity
Continue hot-water supply.The included heat exchanger water outlet band of water heater recycles pump configuration, the lift ability of 11m, driving capability
Making pipeline, water temperature is consistent everywhere, can meet 2 or more multiple spots while the needs of with water.Each water is mixed with cooperation at water spot
Valve uses, and by regulating mixed water valve handle, adjusts the ratio of hot water or cold water, can obtain the hot water of different temperatures.
3, domestic water is saved:
The plug and play hot water that this system is realized, when solving common constant temperature machine water supply of water heater, it is necessary to exclude in water pipe
The problem of can just being used after cold water, reduces the waste of water resource.
4, active Intelligent anti-freezing prevents water heater inner components and frost crack pipe:
When system pipeline coolant-temperature gage is less than 3 DEG C of temperature, controller starts pump operating cycle, water heater combustion heating；When
Pipeline water temperature rises to set temperature (when set temperature is more than 43 DEG C, with 43 DEG C of values for definite value；When 43 DEG C of set temperature ＜, to set
Subject to constant temperature angle value) when, stop heating.The antifreeze function program belongs to water heater program curing；With automatic detection, automatic fortune
The antifreeze advantage of row；Solve winter temperature it is low when, for it is antifreeze using traditional-handwork operation discharge Water heater pipeline internal water accumulation, behaviour
Make complicated problem.
【Description of the drawings】
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings, wherein：
Fig. 1 is the internal structure schematic diagram of the present invention；
Fig. 2 is the present invention without return pipe mounting structure schematic diagram；
Fig. 3, which is the present invention, return pipe mounting structure schematic diagram；
Fig. 4 is the antifreeze work flow diagram of the present invention；
Fig. 5 is that the button preheating of the present invention and water control trigger warm operation flow chart；
Fig. 6 is the external structure schematic diagram of the present invention；
Description of the drawings：1, shell；11, cold water inlet；111, relief valve；112, inlet valve；12, hot water outlet；13, combustion gas
Import；2, heat exchanger；3, burner；4, circulating pump；5, controller；6, water inlet temperature-sensing probe；7, water flow sensor；8, warm
Control device；9, it is discharged temperature-sensing probe；10, proportioning valve；14, smoke exhaust pipe；15, attaching plug；16, manipulation input button；20, unidirectional
Valve；21, automatic exhaust steam valve；22, water mixing valve.
【Specific implementation mode】
It elaborates below in conjunction with the accompanying drawings to embodiments of the present invention.
As shown in Figures 1 to 5, a kind of water supply of water heater system of postposition circulating pump, including shell 1 are set in the shell 1
The burner 3 for being equipped with heat exchanger 2 and being heated to heat exchanger 2 is provided on the shell 1 and is connected with the heat exchanger 2
Logical cold water inlet 11 and hot water outlet 12, which is characterized in that the water outlet of the heat exchanger 2 connects with the hot water outlet 12
It is provided with circulating pump 4 on logical pipeline, the controller being electrically connected respectively with circulating pump 4 and burner 3 is additionally provided in the shell 1
5。
As shown in Figures 1 to 5, in the present embodiment, the pipe that the water inlet pipe of the heat exchanger 2 is connected to cold water inlet 11
The water inlet temperature-sensing probe 6 being electrically connected respectively with temperature controller and water flow sensor 7 are provided on road；
Be provided on the pipeline that the outlet pipe of the heat exchanger 2 is connected to the water inlet pipe of circulating pump 4 respectively with temperature controller
The temperature controller 8 and water outlet temperature-sensing probe 9 being electrically connected.
As shown in Figures 1 to 5, in the present embodiment, it is provided with the combustion gas communicated with the burner 3 on the shell 1
Import 13；The smoke exhaust pipe 14 for being connected with burner 3 and the gas in burner 3 being discharged is additionally provided on shell 1.
As shown in Figures 1 to 5, in the present embodiment, it is provided on the pipeline that the burner 3 is connected to fuel gas inlet 13
Proportioning valve 10.
As shown in Figures 1 to 5, in the present embodiment, relief valve 111 and inlet valve are provided at the cold water inlet 11
112。
As shown in Figures 1 to 5, in the present embodiment, it is additionally provided with attaching plug 15 on the shell 1.
In the present embodiment, as shown in Figures 1 to 5, a kind of water supply of water heater system of postposition circulating pump is additionally provided
Control method, wherein the manipulation input button 16 being electrically connected with the controller 5 is additionally provided on the shell 1, in controller 5
Equipped with the automatically controlled program for receiving signal and execution, which includes button preheating mode program, and water control triggering is pre-
Heat pattern program and anti-freezing pattern program；
Under button preheating mode program, controller starts circulating pump, and the water flow sensor 7 of controller detects flow
Signal simultaneously feeds back to controller, when water outlet temperature-sensing probe 9 detects that pipeline water temperature is less than setting water temperature T 1, starts burner and adds
Heat, when detecting that pipeline water temperature reaches the setting heating temperature of button pipeline start up by preheating pattern, burner 3 stops heating；
Water control triggers preheating mode program：Water flow sensor 7 detects water-flow signal (i.e. opening water valve twice in succession
Door is no more than 4 seconds, turns off with penstock, and the residence time does not surpass 4 seconds, is again turned on and do not surpass 4 seconds with penstock, finally pass water
Valve is realized), start water control and trigger preheating mode, controller starts circulating pump, when water outlet temperature-sensing probe 9 detects pipeline water
Temperature be less than set temperature T1 when, start burner 3 heat, when detect pipeline water temperature reach water control trigger preheating mode setting
When heating temperature, burner 3 stops heating；
Under anti-freezing pattern program, when water inlet temperature-sensing probe 6 or water outlet temperature-sensing probe 9 detect that pipeline water temperature is less than T2,
Start circulating pump 4 operate, while start burner 3 heating, when detect pipeline water temperature reach anti-freezing pattern setting heat temperature
When spending, stop heating, 0 DEG C of ＜ T2 ＜ T1.
Specifically, according to fig. 2 with shown in Fig. 3, which can be divided into 2 kinds of companies according to the structure of the pre- embedded water pipe of user
Connect mode.One of which is only equipped with hot-water line and cold water pipe, such as Fig. 2, and the cold water pipeline after distalmost end water spot extremely returns
Pipeline to water heater cold water entrance 11 is used as mixed water lines, this to be referred to as without return pipe installation pipeline mode；It is another
It is user in addition to hot-water line and cold water pipe are installed, such as Fig. 3, is also laid with an individual hot-water line and is used as return water, this title
To there is return pipe installation pipeline mode.Check valve 20 and automatic exhaust steam valve 30, but check valve are mounted on both pipelines
20 and installation site of the automatic exhaust steam valve 30 in pipeline be slightly different.
The check valve 20 of no return pipe installation pipeline is mounted on the hot-water line and cold water pipe of distalmost end water spot water mixing valve 22
Between, the water flowing direction of check valve 20 flows to cold water end by hot water end, makes the water of whole hot water line and cold water pipeline can be with
Under the driving of circulating pump in water heater, cold water inlet 11 is back to through check valve 20 from the hot water outlet 12 of water heater.Combustion
The hot water for burning 12 outflow of water heater hot-water outlet in heating process does not stop to neutralize the cold water in pipeline, by distalmost end water spot to heat
The cold water of pipeline becomes hot water between hydrophone cold water inlet 11, in this way, whole pipeline has reformed into hot-water line.
Automatic exhaust steam valve 21 is mounted between the cold water inlet 11 and the cold water pipe of water supply pipe of water heater housing, effect
It is the air that will be accumulated in system operation in pipeline, is discharged automatically, prevents air from generating resonance in the duct, lead
Cause pipe vibration and Fa Sheng Xiao crys.
Ensure that the water of water heater hot-water outlet 12 out can be by unidirectional mounted on the check valve 20 of distalmost end water spot
Valve 20 is back to the cold water inlet 11 of water heater through cold water pipeline；Check valve 20 mounted on water supply cold water end ensures circulation pipe
Water in road cannot enter living water pipeline.
Mounted on the inlet valve 112 of water heater, other than the adjustable uninterrupted for flowing into water heater cold water entrance 11,
The relief valve 111 on inlet valve 112 also can be by the water because being heated in circulating line, because temperature raising leads to body simultaneously
Product expansion is able to pressure release, pipeline is avoided to generate excessively high water when hydraulic pressure is more than pressure voltage (0.8MPa) of Water route system of water heater
Pressure, prevents system pipeline and water heater to be destroyed.User when being declined with the coolant-temperature gage of water or system pipeline, also therewith can by pressure
It reduces, the hydraulic pressure in system pipeline is maintained to return to normal hydraulic pressure value.
As shown in figure 3, have the check valve of return pipe installation pipeline be mounted on return pipe A and water heater cold water entrance 11 it
Between, the water flowing direction of check valve 20 flows to water heater cold water entrance 11 by return pipe A.Water in pipeline recycles in water heater
Under the driving of pump 4, exports 12 hot water pipelines through distalmost end water spot from water heater hot-water and be back to water heater through check valve
Cold water inlet 11.Circulating-heating in this way, system will maintain hot water shape with the water in water branch at water mixing valve hot-water line
State, when user opens water mixing valve water, outlet pipe is exactly hot water, can appropriate regulating mixed water valve valve handle, adjust hot water or cold water
Ratio, the hot water of different temperatures can be obtained.There are the check valve 20, automatic exhaust steam valve 21, hot water installed in return pipe pipeline
The function of relief valve in device inlet valve 112 is identical with no water return pipeline.
As shown in Figure 4 and Figure 5, the water supply of water heater system of postposition circulating pump of the present invention, controller are visited by temperature-sensitive of intaking
Head, water outlet temperature-sensing probe acquire pipe temperature, and water flow sensor acquires pipeline water-flow signal data, user is received by button
Demand of the water-flow signal perception user generated with the demand of coolant-temperature gage and water control triggering startup penstock to water, at the same it is defeated
Go out corresponding work order to circulating pump, drives pipe water cycle, realize bathroom, preheating, the implementation of antifreeze operating mode.
Water heater powers on, and piped water supply and gas circuit gas supply are normal, and under open state, controller detects user couple
It is preferential to start bathroom pattern when pipeline has water demand.Controller detects that user presses face-piece " preheating " key or on and off two
It is secondary when having demand to pipe insulation with penstock (water control triggering pattern), start preheating mode.Controller detects pipeline water temperature
When less than antifreeze temperature, start anti-freezing pattern.
When system executes button preheating mode and water control triggers pattern, cycle pump startup operating makes the water in pipeline follow
Inscription of loop starts heat when timing has detected circulating water flow signal in 1 hour and circulating water flow temperature is less than start-up temperature
Hydrophone burns, and heated at constant temperature is carried out to the water in pipeline；When the water of pipeline reach set temperature (set temperature be more than 43 DEG C when,
With 43 DEG C of values for definite value；When 43 DEG C of set temperature ＜, it is subject to set temperature value) after, water heater stops heating, circulating pump delay
It is out of service after 1 minute.System enters keeping warm mode, when controller detects that water temperature is less than set temperature, recycles pump startup
Operating, again ignition heat, recycle the above working procedure, the water temperature of pipeline is just maintained set temperature range in this way
Interior, when user's water, opening penstock can use hot water, realize the effect of plug and play.
The working characteristics that system has bathroom preferential detects in " button preheating " and " water control triggering preheating " operational process
When user has bathroom demand, current operating mode is interrupted, starts water heater, is burnt with the thermostatic of setting.Bathroom terminates
Afterwards, it is transferred to original " button preheating " and " water control triggering preheating " pattern automatically.
Claims (7)
1. a kind of water supply of water heater system of postposition circulating pump, including shell (1), the shell (1) is interior to be provided with heat exchanger
(2) it and to the burner (3) of heat exchanger (2) heating, is provided on the shell (1) and is connected with the heat exchanger (2)
Cold water inlet (11) and hot water outlet (12), which is characterized in that the water outlet of the heat exchanger (2) and the hot water outlet
(12) be provided with circulating pump (4) on the pipeline being connected to, be additionally provided in the shell (1) respectively with circulating pump (4) and burner
(3) controller (5) being electrically connected.
2. a kind of water supply of water heater system of postposition circulating pump according to claim 1, which is characterized in that the heat exchange
The water inlet temperature-sensing probe being electrically connected respectively with temperature controller is provided on the pipeline that the water inlet pipe of device (2) is connected to cold water inlet (11)
(6) and water flow sensor (7)；
Be provided on the pipeline that the outlet pipe of the heat exchanger (2) is connected to the water inlet pipe of circulating pump (4) respectively with temperature controller
The temperature controller (8) and water outlet temperature-sensing probe (9) being electrically connected.
3. a kind of water supply of water heater system of postposition circulating pump according to claim 2, which is characterized in that the cold water enters
It is provided with relief valve (111) and inlet valve (112) at mouth (11).
4. a kind of water supply of water heater system of postposition circulating pump according to claim 1-3 any one, which is characterized in that
The fuel gas inlet (13) communicated with the burner (3) is provided on the shell (1)；It is additionally provided with and burns on shell (1)
The smoke exhaust pipe (14) that device (3) is connected and the gas in burner (3) is discharged.
5. a kind of water supply of water heater system of postposition circulating pump according to claim 1-3 any one, which is characterized in that
It is provided with proportioning valve (10) on the pipeline that the burner (3) is connected to fuel gas inlet (13).
6. a kind of water supply of water heater system of postposition circulating pump according to claim 1-3 any one, which is characterized in that
It is additionally provided with attaching plug (15) on the shell (1).
7. a kind of control method of the water supply of water heater system based on a kind of postposition circulating pump described in claim 2, wherein institute
State the manipulation input button (16) for being additionally provided on shell (1) and being electrically connected with the controller (5), which is characterized in that controller (5)
The interior automatically controlled program being equipped with for receiving signal and execution, the automatically controlled program include button preheating mode program, water control triggering
Preheating mode program and anti-freezing pattern program；
Under button preheating mode program, controller starts circulating pump (4), and water flow sensor (7) detects water-flow signal simultaneously
Controller is fed back to, when water outlet temperature-sensing probe (9) detects that pipeline water temperature is less than setting water temperature T 1, starts burner heating, when
When detecting that pipeline water temperature reaches the setting heating temperature of button pipeline start up by preheating pattern, burner (3) stops heating；
Water control triggers preheating mode program：Water flow sensor (7) detects water-flow signal twice in succession, while being discharged temperature-sensitive spy
When head (9) detects that pipeline water temperature is less than set temperature T1, start burner (3) and heat, when detecting that pipeline water temperature reaches water
When the setting heating temperature of control triggering preheating mode, burner (3) stops heating；
Under anti-freezing pattern program, when water inlet temperature-sensing probe (6) or water outlet temperature-sensing probe (9) detect that pipeline water temperature is less than T2,
Start circulating pump (4) to operate, while starting burner (3) heating, when detecting that pipeline water temperature reaches the setting of anti-freezing pattern and add
When hot temperature, stop heating, 0 DEG C of ＜ T2 ＜ T1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195562.4A CN108469118A (en) | 2018-03-09 | 2018-03-09 | A kind of the water supply of water heater system and control method of postposition circulating pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810195562.4A CN108469118A (en) | 2018-03-09 | 2018-03-09 | A kind of the water supply of water heater system and control method of postposition circulating pump |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110513860A (en) * | 2019-08-02 | 2019-11-29 | 广东长虹日电科技有限公司 | A kind of anti-freezing gas water heater and its control method |
| CN110513861A (en) * | 2019-08-02 | 2019-11-29 | 广东长虹日电科技有限公司 | The anti-freezing gas water heater and its control method mechanically triggered |
| CN111457460A (en) * | 2020-05-18 | 2020-07-28 | 珠海格力电器股份有限公司 | Zero-cold-water heater system, control method thereof and computer-readable storage medium |
| CN112254349A (en) * | 2019-07-22 | 2021-01-22 | 芜湖美的厨卫电器制造有限公司 | Zero-cold-water supply system, control method of zero-cold-water supply system and water heater |
| CN112283947A (en) * | 2019-07-22 | 2021-01-29 | 芜湖美的厨卫电器制造有限公司 | Zero cold water supply system and water heater |
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