CN109654721A - A kind of heating device and method for heating and controlling - Google Patents
A kind of heating device and method for heating and controlling Download PDFInfo
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- CN109654721A CN109654721A CN201811544110.9A CN201811544110A CN109654721A CN 109654721 A CN109654721 A CN 109654721A CN 201811544110 A CN201811544110 A CN 201811544110A CN 109654721 A CN109654721 A CN 109654721A
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- water
- water inlet
- heating
- pipe
- circulation
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/145—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/12—Arrangements for connecting heaters to circulation pipes
- F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
- F24H9/139—Continuous flow 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
- F24H9/18—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)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The present invention provides a kind of heating device and method for heating and controlling, are related to field of water heaters.The heating device includes water inlet pipe, outlet pipe, heating tube, circulation pipe, heat exchanger, water pump and shutdown switch；One end of heating tube and one end of water inlet pipe connect, and one end of the other end and outlet pipe connects；The other end of water inlet pipe is connected to water source, and the other end of outlet pipe with water installations for connecting；Heating tube is set on heat exchanger；One end of circulation pipe is connect with water inlet pipe, and the other end is connect with outlet pipe；Shutdown switch is connect with water inlet pipe and circulation pipe respectively, for controlling the on-off of water inlet pipe and circulation pipe；Water pump is set on water inlet pipe.It can effectively guarantee water temperature during water is heated in start and stop, and structure is simple, easy to operate.
Description
Technical field
The present invention relates to field of water heaters, in particular to a kind of heating device and method for heating and controlling.
Background technique
Currently, gas heater is when hot water is stopped, water heater stops burning and does not work, in water-heater heat-exchanging device
The case where water of stagnation will appear overheat.When being again started up water heater, water heater reaches burning corresponding temperature from igniting and needs
Significant period of time can be mixed into a Duan Lengshui during this, user is caused to occur cold wave sense during bathing.
In general, to solve this problem, water pot can be set in water outlet pipe part, but water pot commissure easily corrodes, and
Water pot is too small to be not achieved the purpose for alleviating water temperature, and water pot excessive heating time is long and expensive.
It is therefore proposed that a kind of solution can keep the constant mode of water temperature in water heater shutdown process, it is urgently to solve at present
Certainly the problem of.
Summary of the invention
The purpose of the present invention includes providing a kind of heating device, can effectively guarantee water during water is heated in start and stop
Temperature, structure is simple, easy to operate.
The purpose of the present invention further includes providing a kind of method for heating and controlling, acts the process cut off the water to heating device and controls
System guarantees the water temperature balance in water heater shutdown process.
The first technical solution provided by the invention:
A kind of heating device is applied to field of water heaters, which includes water inlet pipe, outlet pipe, heating tube, circulation
Pipe, heat exchanger, water pump and shutdown switch；One end of the heating tube is connect with one end of the water inlet pipe, the other end and institute
State one end connection of outlet pipe；The other end of the water inlet pipe is connected to water source, and the other end of the outlet pipe uses water for same
Device connection；The heating tube is set on the heat exchanger；One end of the circulation pipe is connect with the water inlet pipe, the other end
It is connect with the outlet pipe；The shutdown switch connect with the water inlet pipe and the circulation pipe respectively, for described in controlling into
The on-off of water pipe and the circulation pipe；The water pump is set on the water inlet pipe.
Further, the shutdown switch includes water inlet shutdown switch and circulation shutdown switch；The circulation shutdown is opened
Pass is set on the circulation pipe；Water inlet shutdown switch is set on the water inlet pipe, and water inlet shutdown switch and
The opposite two sides for being set to the circulation pipe Yu the water inlet tube interface of the water pump, and the relatively described water inlet of the water pump is closed
It disconnects and closing closer to the heating tube.
Further, the circulation shutdown switch is return water shut-off valve；The water inlet shutdown switch is water inlet shut-off valve.
Further, the shutdown switch is triple valve；The triple valve is set to the circulation pipe and the water inlet pipe
Junction.
It further, further include the first detector and the second detector；First detector is set to the outlet pipe
On, and first detector is close to the heating tube；Second detector is set on the water inlet pipe, and described second
Detector is close to the heating tube.
Further, first detector is temperature sensor；Second detector is water flow sensor.
It further, further include controller；The controller respectively with first detector, second detector,
The water pump and the shutdown switch connection, for first detector, second detector, the water pump and
The shutdown switch carries out centralized control.
Second of technical solution provided by the invention:
A kind of method for heating and controlling, which is characterized in that applied to heating device described in the first scheme；The heating
Control method the following steps are included:
Water recycles pre-treatment, obtains switching signal, and handle the switching signal, generates circular treatment instruction.
Water circular treatment is instructed according to the circular treatment, and prevention continues to intake, and is recycled and is heated to water.
Water circulation post-processing, receives temperature detection signal, and handle the temperature detection signal, after generating circulation
Process instruction.
Water supply processing carries out water supply processing according to circulation post-processing instruction.
Further, the water supply processing step specifically includes:
When the detection temperature that the temperature detection signal provides is lower than threshold temperature, the first water supply processing signal is generated,
And supply water according to described first and handle signal, continue the water circular treatment step.
When the detection temperature that the temperature detection signal provides is not less than threshold temperature, the second water supply processing is generated
Signal supplies water according to described second and handles signal, stops circulation, continues water inlet heating, and convey hot water.
Further, when stopping recycling, when continuing water inlet heating, flow of inlet water is detected, is specifically included:
When flow of inlet water detected is less than threshold flow, stops water inlet and supply water, be simultaneously stopped heating.
When the flow of inlet water detected is not less than threshold flow, continues to heat and intake, while exporting hot water.
Compared to existing heating device and method for heating and controlling, a kind of heating device provided by the invention and computer heating control side
The beneficial effect of method is:
Setting shutdown switch and water pump in heating device, during carrying out start and stop heating to water, to the supply of water and
Carry out sequence guidance is flowed to, the stabilization of the water temperature of the water of outflow is effectively ensured.
Method for heating and controlling is carried out sequential control to water flow, is opened with effectively stable during heating device rises and cuts off the water
The water temperature of the water flowed out during cutting off the water.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram for the heating device that first embodiment of the invention provides；
Fig. 2 is the heating control system block diagram for the heating device that first embodiment of the invention provides；
Fig. 3 is the flow chart for the method for heating and controlling that first embodiment of the invention provides；
Fig. 4 is the structural schematic diagram for the heating device that second embodiment of the invention provides.
Icon: 100- heating device；01- water inlet pipe；02- heating tube；03- outlet pipe；04- circulation pipe；05- heat exchanger；
06- water pump；07- shutdown switch；71- water inlet shutdown switch；72- circulation shutdown switch；The first detector of 81-；82- second is detected
Device；09- controller.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, or be somebody's turn to do
Invention product using when the orientation or positional relationship usually put or those skilled in the art orientation or position that usually understand
Relationship is set, is merely for convenience of description of the present invention and simplification of the description, rather than the equipment of indication or suggestion meaning or element are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply
Relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
First embodiment
Referring to Fig. 1, present embodiments providing a kind of heating device 100.The heating device 100 includes water inlet pipe 01, adds
Heat pipe 02, outlet pipe 03, circulation pipe 04, heat exchanger 05, water pump 06, shutdown switch 07, detector and controller 09.
01 one end of water inlet pipe is connected to water source, and the other end is connected to one end of heating tube 02, and water inlet pipe 01 is used for water source
Water be introduced into heating tube 02 and heated.One end of outlet pipe 03 is connect with the other end of heating tube 02, outlet pipe 03
The other end is connect with water installations.Water after outlet pipe 03 is used to heat is introduced into in water installations.Heating tube 02, which is set to, changes
On hot device 05, heat exchanger 05 is used to carry out heat exchange to the water in heating tube 02.
Under normal circumstances, water enters heating tube 02 through water inlet pipe 01, and under the action of heat exchanger 05, in heating tube 02
Water is heated, and by outlet pipe 03 be directed to water installations carry out using.When normal use, water temperature be it is constant, when temporary
When not needing using hot water, outlet pipe 03 and the connection with water installations are had turned off, and heat exchanger 05 stops in heating tube 02
Water heating, but the water in heating tube 02 rests on inside, and temperature can rise, and the water in water inlet pipe 01 is still cold
's.
When reusing hot water, outlet pipe 03 is connected to with water installations, and the water in heating tube 02 is heated liter again
It is flowed out after temperature, user obviously feels that water temperature increases, and the set temperature that heat exchanger 05 reaches heating needs the regular hour, this
In one time, set temperature is not heated to by the water of heating tube 02, after the outflow of outlet pipe 03, user is clearly felt that
Water temperature reduces, in this way, bringing uncomfortable hot water usage experience to user.
Therefore, to solve the above-mentioned problems, circulation pipe 04 is set between water inlet pipe 01 and outlet pipe 03.Circulation pipe 04
One end is connect with one end of water inlet pipe 01, and the other end is connect with one end of outlet pipe 03.It is set on circulation pipe 04 and water inlet pipe 01
Shutdown switch 07 is set, water pump 06 is set in water inlet pipe 01, the water flowing direction in heating device 100 is guided with facilitating.
Specifically, in the present embodiment, shutdown switch 07 includes water inlet shutdown switch 71 and circulation shutdown switch 72.Water inlet is closed
Disconnect closing and 71 be set on water inlet pipe 01, water inlet shutdown switch 71 it is opposite with water pump 06 be set to circulation pipe 04 and water inlet pipe 01
The two sides of junction, and the opposite water inlet of water pump 06 turns off switch 71 closer to heating tube 02.Circulation shutdown switch 72, which is set to, to follow
On endless tube 04.
Water inlet turns off switch 71 and recycles the form and wide variety of shutdown switch 72, and in the present embodiment, water inlet is turned off and opened
71 are closed as water inlet shut-off valve, circulation shutdown switch 72 is return water shut-off valve.
In this way, water inlet shutdown switch 71 can close first when reusing hot water, circulation shutdown switch 72 can be opened,
Water inlet pipe 01, heating tube 02, outlet pipe 03 and circulation pipe 04 will form the water loop of a circulation, in the effect of water pump 06
Under, water flows in water loop, and is ceaselessly heated continuously set temperature by heating tube 02.
It is provided with the first detector 81 on the outlet pipe 03 of water loop, the second detector is provided on water inlet pipe 01
82.In the present embodiment, the first detector 81 is temperature sensor, and the second detector 82 is water flow sensor.Work as temperature detection
Device detects that the temperature of the water in water loop in outlet pipe 03 has reached the temperature of setting, and circulation shutdown switch 72 can close, into
Water shutdown switch 71 can be opened, while water pump 06 is out of service.
At this moment, heat exchanger 05 can heat the water to the temperature of setting to the heat effect of the water in heating tube 02, into
The water at water source is introduced into heating tube 02 heats again by water pipe 01, the second detector 82 to the water flow in water inlet pipe 01 into
Row detection guarantees that water flow to threshold flow, avoids water flow too small, and the water of heating tails off, and water temperature is higher than set water temperature, occurs
Water overheat condition.Control of the 100 start and stop water of heating device in the process to water temperature is just completed in this way, avoids the occurrence of water temperature fluctuation
Problem.
Referring to Fig. 2, for convenience the process is controlled, also convenient for users to operate with, be arranged controller
09, controller 09 is connect with water pump 06, shutdown switch 07, the first detector 81, the second detector 82 and heater respectively,
Middle heater is connect with heat exchanger 05, provides thermal energy for heat exchanger 05, to realize that heat exchanger 05 carries out the water in heating tube 02
Heating.The type of controller 09 is a variety of, can be simple PLC processor, is also possible to other industrial control unit (ICU)s.
Referring to Fig. 3, and combining Fig. 2.A kind of method for heating and controlling is present embodiments provided, which includes
Following steps:
Water recycles pre-treatment: obtaining switching signal, and handles the switching signal, generates circular treatment instruction.
Water circular treatment: instructing according to the circular treatment of generation, and prevention continues to intake, and is recycled and is heated to water.
Water circulation post-processing: receiving temperature detection signal, and handle temperature detection signal, generates circulation post-processing
Instruction.
Water supply processing: water supply processing is carried out according to the post-processing instruction of the circulation of generation.
Wherein, the specific steps of processing of supplying water include:
The temperature of water in water circulation is detected:
When the detection temperature that the temperature detection signal detected provides is lower than threshold temperature, generates first and supply water to handle and believe
Number, and supply water according to first and handle signal, continue the water circular treatment step.
When the detection temperature that the temperature detection signal detected provides is not less than threshold temperature, the second water supply processing is generated
Signal supplies water according to second and handles signal, and stopping recycles water, continues water inlet heating, and convey hot water.
During continuing water inlet heating, flow of inlet water is detected:
When flow of inlet water detected is less than threshold flow, stops water inlet and supply water, be simultaneously stopped heating.
When flow of inlet water detected is not less than threshold flow, continues to heat and intake, while exporting hot water.
A kind of heating device 100 and method for heating and controlling provided in this embodiment, when using hot water by being again turned on,
Water circulating-heating process is carried out first, realizes and stablizing for water temperature is kept, and promotes the comfort that user uses hot water.
Second embodiment
Referring to Fig. 4, the present embodiment provides another heating devices 100.It is mentioned in the heating device 100 and first embodiment
The difference of the heating device 100 of confession is: the set-up mode of shutdown switch 07 is different.
In this implementation, the junction of water inlet pipe 01 Yu circulation pipe 04 is arranged in shutdown switch 07.Preferably, switch 07 is turned off
For triple valve；Water inlet pipe 01 that the first end of triple valve is connected to same water source is connected to, second end connect with same heating tube 02 into
Water pipe 01 is connected to, and third end is connected to circulation pipe 04.
In the present embodiment, shutdown switch 07 is set up directly on the junction of water inlet pipe 01 Yu circulation pipe 04, can save progress
The cost of water circulation, in addition, also further simplifying the control that water inlet pipe 01 is connected to and is turned off with circulation pipe 04.
100 other parts of heating device provided in this embodiment are identical as the heating device 100 that first embodiment provides, this
In repeat no more.
A kind of heating device 100 and method for heating and controlling provided by the invention, at least have the following the utility model has the advantages that
By setting circulation pipe 04, water pump 06, the first detector 81, the second detector 82 and shutdown switch 07, again
It when secondary unlatching is using hot water, realizes the effective control heated to water, avoids the water temperature fluctuation situation for heating insufficient appearance, increase
User uses the comfort of hot water.
Controller 09 is set, centralized control is carried out to entire heating method, keeps heating more efficient and easy to operate time saving.
Shutdown switch 07 is set up directly on the junction of water inlet pipe 01 Yu circulation pipe 04, can save the cost for carrying out water circulation, in addition,
Further simplify the control that water inlet pipe 01 is connected to and is turned off with circulation pipe 04.
It should be noted that appended drawing reference with the arrow in all attached drawings refers to the direction or information flow side of water flowing
To appended drawing reference not with the arrow is to refer to entity structure.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of heating device, which is characterized in that be applied to field of water heaters, which includes water inlet pipe, outlet pipe, adds
Heat pipe, circulation pipe, heat exchanger, water pump and shutdown switch；One end of the heating tube is connect with one end of the water inlet pipe, separately
One end is connect with one end of the outlet pipe；The other end of the water inlet pipe is connected to water source, and the other end of the outlet pipe is used
The connection of Yu Tongyong water installations；The heating tube is set on the heat exchanger；One end of the circulation pipe and the water inlet pipe connect
It connects, the other end is connect with the outlet pipe；The shutdown switch is connect with the water inlet pipe and the circulation pipe respectively, for controlling
Make the on-off of the water inlet pipe and the circulation pipe；The water pump is set on the water inlet pipe.
2. heating device as described in claim 1, which is characterized in that the shutdown switch includes water inlet shutdown switch and follows
Ring shutdown switch；The circulation shutdown switch is set on the circulation pipe；The water inlet shutdown switch is set to the water inlet
Guan Shang, and the water inlet shutdown switchs be set to the circulation pipe and the water inlet tube interface two opposite with the water pump
Side, and the relatively described water inlet shutdown of the water pump is switched closer to the heating tube.
3. heating device as claimed in claim 2, which is characterized in that the circulation shutdown switch is return water shut-off valve；It is described
Water inlet shutdown switch is water inlet shut-off valve.
4. heating device as described in claim 1, which is characterized in that the shutdown switch is triple valve；The triple valve is set
It is placed in the junction of the circulation pipe Yu the water inlet pipe.
5. heating device as described in claim 1, which is characterized in that further include the first detector and the second detector；It is described
First detector is set on the outlet pipe, and first detector is close to the heating tube；Second detector is set
It is placed on the water inlet pipe, and second detector is close to the heating tube.
6. heating device as claimed in claim 5, which is characterized in that first detector is temperature sensor；Described
Two detectors are water flow sensor.
7. heating device as claimed in claim 5, which is characterized in that further include controller；The controller respectively with it is described
First detector, second detector, the water pump and the shutdown switch connection, for first detector,
Second detector, the water pump and shutdown switch carry out centralized control.
8. a kind of method for heating and controlling, which is characterized in that applied to heating device described in claim 1-7 any one；Institute
State method for heating and controlling the following steps are included:
Water recycles pre-treatment, obtains switching signal, and handle the switching signal, generates circular treatment instruction；
Water circular treatment is instructed according to the circular treatment, and prevention continues to intake, and is recycled and is heated to water；
Water circulation post-processing, receives temperature detection signal, and handle the temperature detection signal, generates circulation post-processing
Instruction；
Water supply processing carries out water supply processing according to circulation post-processing instruction.
9. method for heating and controlling as claimed in claim 8, which is characterized in that the water supply processing step specifically includes:
When the detection temperature that the temperature detection signal provides is lower than threshold temperature, the first water supply processing signal, and root are generated
It supplies water according to described first and handles signal, continue the water circular treatment step；
When the detection temperature that the temperature detection signal provides is not less than threshold temperature, generates second and supply water to handle and believe
Number, it supplies water according to described second and handles signal, stop circulation, continue water inlet heating, and convey hot water.
10. method for heating and controlling as claimed in claim 9, which is characterized in that right when continuing water inlet heating when stopping circulation
Flow of inlet water is detected, and is specifically included:
When flow of inlet water detected is less than threshold flow, stops water inlet and supply water, be simultaneously stopped heating；
When the flow of inlet water detected is not less than threshold flow, continues to heat and intake, while exporting hot water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811544110.9A CN109654721A (en) | 2018-12-17 | 2018-12-17 | A kind of heating device and method for heating and controlling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811544110.9A CN109654721A (en) | 2018-12-17 | 2018-12-17 | A kind of heating device and method for heating and controlling |
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| CN105387629A (en) * | 2015-12-11 | 2016-03-09 | 广东万家乐燃气具有限公司 | Constant-temperature type gas water heater and control method |
| CN107367065A (en) * | 2016-05-12 | 2017-11-21 | 青岛经济技术开发区海尔热水器有限公司 | A kind of gas heater antifreeze using water pump and method |
| CN107367051A (en) * | 2016-05-12 | 2017-11-21 | 青岛经济技术开发区海尔热水器有限公司 | A kind of gas heater antifreeze using water pump and adding thermal resistance and method |
| CN108036497A (en) * | 2017-12-07 | 2018-05-15 | 成都前锋电子有限责任公司 | A kind of gas heater and its preheating start-up and shut-down control method |
| CN108444094A (en) * | 2018-06-06 | 2018-08-24 | 广东万家乐燃气具有限公司 | A kind of thermostatic type central heater and control method |
| CN209246364U (en) * | 2018-12-17 | 2019-08-13 | 广东万家乐燃气具有限公司 | A kind of heating device and water heater |
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