CN107101360A - A kind of hot water cyclesystem and control method with self power generation - Google Patents
A kind of hot water cyclesystem and control method with self power generation Download PDFInfo
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- CN107101360A CN107101360A CN201710336377.8A CN201710336377A CN107101360A CN 107101360 A CN107101360 A CN 107101360A CN 201710336377 A CN201710336377 A CN 201710336377A CN 107101360 A CN107101360 A CN 107101360A
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- water
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- cold water
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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
- F24H1/107—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 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
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- 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 present invention discloses a kind of hot water cyclesystem with spontaneous electrical function, including：Gas heater, hot water circulating device, some use water spots and the check valve with spontaneous electrical function；The check valve, including：Hot water pipeline, cold water pipes, by-pass line, nonreturn valve core, water flow generator, the first temperature sensor, microcontroller and the first radio receiving transmitting module, the by-pass line is connected between hot water pipeline and cold water pipes, the nonreturn valve core is arranged in by-pass line, the water flow generator is arranged on cold water pipes and powered for microcontroller, first temperature sensor is arranged on the water inlet end of cold water pipes, and first radio receiving transmitting module, the first temperature sensor are all connected with microcontroller signal.During work, the temperature that temperature sensor is detected using in check valve solves to cause the relatively low phenomenon of hot water pipeline water temperature because pipeline temperature drop is inconsistent as pipeline start up by preheating condition, thoroughly.Invention additionally discloses a kind of control method of hot water cyclesystem.
Description
Technical field
The present invention relates to central fuel gas water heating device technical field, more particularly to a kind of hot water cyclesystem with self power generation
And control method.
Background technology
Gas heater is convenient for people to the water demands such as bathing as a kind of household bath electrical appliance, supply user's hot water,
But with the increase of user pipe length, need to wait the long period to go out hot water in distal end water spot before user's bathing,
Costly, therefore in the market also occurs in that the external hot water of many kinds to the central type gas heater price of band preheating function in addition
EGR, meets the water demand of user's instant-heating to a certain extent；But external hot water circulating device is due to lacking
Few water pump Posterior circle, so there is larger temperature overshot phenomenon, or even many functions can only could be used when three pipes are installed,
Also limited while having a strong impact on comfort by installation pipeline quantity.
In addition, hot water pipeline temperature drop differs, the caused relatively low phenomenon of central type gas heater pipeline water temperature is in external heat
Further it is completely exposed on water circle device, in order to solve the above technical problems, Publication No. CN201610220274.0
Patent of invention, refers to a kind of circulation stop valve, it is formed communication between water heater.Mainly comprising connecting pipe, electronic section
Only valve and Communications Processor Module, one end of the connecting pipe is connected with hot-water line, the other end of connecting pipe and cold water pipe connect
Connect, the electric check valve is arranged on connecting pipe, the communication and processing module and water heater circulating pump, electric check valve
Signal is connected, and the water temperature that communication in real time detects temperature sensor with processing module is sent to water heater master controller, works as temperature
When the water temperature that degree sensor is detected is less than the pipeline start up by preheating temperature set, master controller starts circulating pump, works as temperature sensor
When the water temperature detected is higher by T DEG C of the pipeline start up by preheating temperature of setting, master controller stops circulating pump, and fed back according to circulating pump
The opening of signal control electric check valve, closing.But the patent and do not refer to power supply how to solve, electric check valve is specific
Type, while the control mode referred to using this patent will cause serious overheating problem.
In addition, for hot water circulating device in the market, its warm-up cycle water-carrying capacity is general in 4L/min, and common
Water heater lowest temperature rise is higher, there is preheating overtemperature, the neighbouring probe temperature of device, which drops to pipeline start up by preheating point, needs the long period, leads
Cause farthest seriously relatively low with water spot pipeline water temperature.
The content of the invention
For problems of the prior art, hot water pipeline temperature is avoided to differ it is an object of the invention to provide one kind
And the hot water cyclesystem with spontaneous electrical function.
The present invention also provides a kind of control method with above-mentioned hot water cyclesystem.
To achieve the above objectives, the present invention is adopted the following technical scheme that.
A kind of hot water cyclesystem with spontaneous electrical function, it is characterised in that including：Gas heater, hot water circuit
Device, some use water spots and the check valve with spontaneous electrical function；Connected on the water inlet of gas heater into cold water pipe, institute
Hot water circulating device is stated on the delivery port of gas heater；The check valve includes：Hot water pipeline, cold water pipes, side
Thread a pipe, nonreturn valve core, water flow generator, the first temperature sensor, microcontroller and the first radio receiving transmitting module, the bypass
Pipeline is connected between hot water pipeline and cold water pipes, and the nonreturn valve core is arranged in by-pass line, makes current can only be from heat
Waterpipe flows into cold water pipes, and the water flow generator is arranged on cold water pipes and powered for microcontroller, first temperature
Sensor be arranged on cold water pipes water inlet end, first radio receiving transmitting module, the first temperature sensor all with microcontroller
Signal is connected；The hot water circulating device includes：Circulating line, second temperature sensor, water pump on circulating line,
The master controller being connected with second temperature sensor, water pump signal, and the second wireless singal transmitting-receiving being connected with master controller
Module, the second wireless singal transceiver module communicates with the first wireless signal transceiver module；The water inlet end of the circulating line
It is connected with the delivery port of gas heater, the water side of the circulating line is entered by the hot water pipeline of hot-water outlet pipe and check valve
Water end (W.E.) is connected, the water side of check valve hot water pipeline connects the interface of hot water of distalmost end water spot, and check valve cold water pipes go out
Water end (W.E.) connects the cold water interface of distalmost end water spot, and the water inlet end of check valve cold water pipes is connected by cold water branch pipe with entering cold water pipe
It is logical.
As a further illustration of the above scheme, being provided with the thermo-electric generation dress powered for microcontroller on hot water pipeline
Put.
As a further illustration of the above scheme, the charge and discharge device powered for it is connected with a microcontroller, it is described
Water flow generator is charged by the Voltage stabilizing module that boosts for charge and discharge device.
As a further illustration of the above scheme, being connected with power supply monitoring mould between charge and discharge device and microcontroller
Block.
As a further illustration of the above scheme, provided with the water-carrying capacity sensing being connected with master controller on circulating line
Device.
As a further illustration of the above scheme, being serially connected with water tank on circulating line.
As a further illustration of the above scheme, operation display is connected with master controller, on operation display
Provided with " switch ", preheating mode switch ", " heating ", " cooling " key.
A kind of hot water cyclesystem control method, it is characterised in that be stored with 01 and 02 in warm-up cycle master controller
Both of which, pipeline start up by preheating condition is：Master controller reads the temperature T of hot water pipeline distalmost end water spot1And gas heater
The temperature T of delivery port2, and carry out following pipeline start up by preheating condition judgment：T2<TIf- 3 DEG C or T1<TIf- Δ T, as long as meeting in both
Any one just control starting mode of pump, gas heater preheated burning, Δ T span is 6-10 DEG C.
After starting mode of pump, if selection 01 pattern, represent timing mode, when the pump operation time reach setting duration after this
Preheating is finished, and reenters pipeline start up by preheating condition judgment；If selecting 02 pattern, intelligent mode is represented, works as T1>TIfAfter -2 DEG C this
Preheating is finished, and reenters pipeline start up by preheating condition judgment.
As a further illustration of the above scheme, 00 pattern that is stored with the host controller, under 00 pattern, master controller
The temperature T of reading gas heater delivery port2, and with T2As pipeline start up by preheating condition judgment, work as T2<TIfAt -3 DEG C, water is controlled
Pump startup carries out preheated burning, and whether this preheating is finished after the pump operation time setting duration is reached, rejudge and meet
Pipeline start up by preheating condition T2<TIf-3℃。
The beneficial effects of the invention are as follows；
First, by increase, temperature sensor is arranged on and farthest uses water spot all the way, and the hot water temperature is closer to whole hot water
Actual water temperature in pipeline, hot water pipeline water temperature can be monitored in real time, thoroughly solve to cause hot water pipeline because pipeline temperature drop is inconsistent
The relatively low phenomenon of water temperature.
2nd, after preheating is opened, the temperature that temperature sensor is detected using in check valve meets bar as pipeline start up by preheating condition
After part, water pump just starts running, and Water heater igniting starts preheating, is difficult to be influenceed to cause system by start cold water, water cut-off temperature-rising etc.
Overtemperature or pipeline start up by preheating slowly cause hot water pipeline water temperature relatively low, you can prevent local temperature from changing the influence to pipeline start up by preheating.
3rd, check valve carries microcontroller, and passes through current and temperature difference dual power supply, it is ensured that delivery；Meanwhile, power supply prison
Comprehensive automatic protection of the module completion to farad capacitor is surveyed, the micro control system battery capacity indication at check valve when generated energy is not enough
Lamp is lighted, and is easy to user to understand electric power thus supplied in real time.
4th, by integrated a variety of preheating modes in the host controller, user can be unidirectional according to its economic conditions selection distal end
The structure and type of valve, meet domestic consumer's water demand；This is that other hot water circulating devices are not had.
Brief description of the drawings
Fig. 1 show the hot water cyclesystem structural representation that the present invention is provided.
Fig. 2 show one-way valve structures schematic diagram.
Fig. 3 show microcontroller circuit connection figure.
Fig. 4 show hot water circulating device structural representation.
Fig. 5 show the hot water cyclesystem workflow diagram that the present invention is provided.
Description of reference numerals：
1：Gas heater, 2：Hot water circulating device, 3：With water spot, 4：Check valve, 5：Hot-water outlet pipe, 6：Cold water branch pipe,
7：Enter cold water pipe.
2-1：Circulating line, 2-2：Second temperature sensor, 2-3：Water pump, 2-4：Water flow sensor, 2-5：Water tank, 2-
6：Master controller, 2-7：Second wireless singal transceiver module.
4-1：Hot water pipeline, 4-2：Cold water pipes, 4-3：By-pass line, 4-4：Nonreturn valve core, 4-5：Water flow generator, 4-
6：Thermo-electric generation sheet, 4-7：First temperature sensor, 4-8：Microcontroller, 4-9：First radio receiving transmitting module.
Embodiment
In the present invention, except as otherwise clear stipulaties and restriction, it should make if any term " assembling ", " connected ", " connection " term
Broad sense is gone to understand, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can also be that machinery connects
Connect；Can be joined directly together or be connected by intermediary, can be that two element internals are connected.For ability
For the those of ordinary skill of domain, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In invention, unless otherwise prescribed and limit, fisrt feature second feature it " on " or it " under " can include
First and second features are directly contacted, can also include fisrt feature and second feature not be direct contact but by them it
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature the
Directly over two features and oblique upper, or be only to represent that fisrt feature level height is higher than the height of second feature.Fisrt feature
Second feature " on ", " under " and " below " include fisrt feature immediately below second feature or obliquely downward, or only table
Show that fisrt feature level height is less than second feature.
With reference to the accompanying drawing of specification, it is further described by the embodiment to the present invention, sends out this
Bright technical scheme and its advantage is clearer, clear and definite.It is exemplary, purport to describe embodiment below with reference to accompanying drawing
The present invention is being explained, and is being not considered as limiting the invention.
As shown in figure 1, a kind of hot water cyclesystem, including：Gas heater 1, hot water circulating device 2, some use water spots 3
With check valve 4, connected on the water inlet of gas heater 1 into cold water pipe 7, the hot water circulating device 2 is arranged on combustion gas heat
On the delivery port of hydrophone 1, the use water spot 3 is by the connection of hot-water outlet pipe 5 and hot water circulating device 2 and passes through cold water branch pipe 6
It is connected with entering cold water pipe 2.
Wherein, as shown in Fig. 2 the check valve 4 includes：Hot water pipeline 4-1, cold water pipes 4-2, by-pass line 4-3, list
To valve element 4-4, water flow generator 4-5, thermo-electric generation sheet 4-6, the first temperature sensor 4-7, microcontroller 4-8 and first is wireless
Transceiver module 4-9, the by-pass line 4-3 are connected between hot water pipeline 4-1 and cold water pipes 4-2, the nonreturn valve core 4-4
It is arranged in by-pass line 4-3, current is flowed into cold water pipes 4-2, the water flow generator 4-5 from hot water pipeline 4-1
Powered on cold water pipes 4-2 for microcontroller 4-8, it is micro- that the thermo-electric generation sheet 4-6, which is arranged on hot water pipeline 4-1,
Controller 4-8 powers, and the first temperature sensor 4-7 is arranged on cold water pipes 4-2 water inlet end, first wireless receiving and dispatching
Module 4-9, the first temperature sensor 4-7 are connected with microcontroller 4-8 signals.
As shown in figure 3, the farad capacitor powered for it is connected with microcontroller 4-8, the water flow generator 4-5,
Thermo-electric generation sheet 4-6 is charged by the Voltage stabilizing module that boosts for farad capacitor, is also connected between farad capacitor and microcontroller 4-8
There is power supply monitoring module.In the present embodiment, preferably microcontroller boosts Voltage stabilizing module by thermo-electric generation sheet and water by CS5171/3
The voltage stabilization that stream generator is sent is VCC, is charged to farad capacitor.Microcontroller gathers single by temperature sampling circuit
Water temperature data to valve.In addition, microcontroller monitors farad capacitor both end voltage in real time by power supply monitoring module, when its magnitude of voltage
During less than 3.5V, micro control system chip DLZSD pins output low potential, its battery capacity indication lamp LED is lighted.
With reference to shown in Fig. 4, the hot water circulating device 2 includes：Circulating line 2-1, on circulating line 2-1
Two temperature sensor 2-2, water pump 2-3, water flow sensor 2-4, water tank 2-5, believe with second temperature sensor 2-2, water pump 2-3
The master controller 2-6, and the second wireless singal transceiver module 2-7 being connected with master controller 2-6 of number connection.The circulation pipe
Road 2-1 water inlet end is connected with the delivery port of gas heater 1, the water side of the circulating line 2-1 by hot-water outlet pipe 5 with
The hot water pipeline water inlet end connection of check valve 4, the water side of check valve hot water pipeline connects the interface of hot water of distalmost end water spot,
The water sides of check valve cold water pipes connects the cold water interface of distalmost end water spot, and the water inlet ends of check valve cold water pipes passes through cold
Water branch pipe is connected with entering cold water pipe.
During real work, the first radio receiving transmitting module communicates with the second radio receiving transmitting module, and master controller is used as whole system
Unite control centre；Water flow sensor gathers sensor as device circulating water flow；Water pump provides power for system circulation；Storage
Water pot is used as temperature buffer pond so that flow into the water temperature relative constancy of hot water pipeline.Operation display is connected with master controller
Device, is provided with " switch ", " preheating mode switching " " heating " " cooling " key, system is not opened pre- in the operation interface of operation display
During hot merit energy, the normal bathing pattern that is in is represented, system is opened after preheating function, carried out according to pipeline start up by preheating and closedown condition pre-
Hot burning is with closing.
As shown in figure 5, specifically preheating principle is as follows：
Be stored with 01 and 02 both of which in the host controller, and master controller reads the temperature T that first sensor is detected1
The temperature T detected with second temperature sensor2, and carry out following pipeline start up by preheating condition judgment：T2<TIf- 3 DEG C or T1<TIf-Δ
T, as long as meeting any one of both just control starting mode of pump, gas heater preheated burning, Δ T span is 6-10
℃.After starting mode of pump, if 01 pattern of selection, represents timing mode, this is preheated after the pump operation time setting duration is reached
Finish, reenter pipeline start up by preheating condition judgment；If selecting 02 pattern, intelligent mode is represented, works as T1>TIfThis is preheated after -2 DEG C
Finish, reenter pipeline start up by preheating condition judgment.
Further, be stored with 00 pattern in the host controller, under 00 pattern, and master controller only reads second temperature biography
The temperature T that sensor is detected2, and with T2As pipeline start up by preheating condition judgment, work as T2<TIfAt -3 DEG C, control starting mode of pump carries out pre-
Heat burning, this preheating is finished after the pump operation time setting duration is reached, is rejudged and whether is met T2<TIf-3℃.It is logical
Cross and store 00 preheating mode in the host controller, no matter whether check valve has communication and temperature detecting function, can realize dress
Preheating function is put, enhancing product installs adaptability, corresponding control system is built according to product real needs, such as remote electrically controlled
Check valve etc., will really make a distinction on the cold hot water piping stricti jurise of user.
Compared with prior art, the hot water cyclesystem that the present embodiment is provided has the characteristics that：
1) the pre- hot property of device is substantially improved：It is unidirectional by being equipped with the wireless data transmission with spontaneous electrical function in distal end
Valve, carries out pipeline start up by preheating judgement according to the excursion of user's preferred temperature, is always ensured that whole hot water pipeline water temperature advance
In setting range, cold water pipes are almost cold water, thoroughly solve the inconsistent caused hot water pipeline water temperature of pipeline temperature drop relatively low existing
As；Pre- thermal comfort is substantially improved.
2) it can be generated electricity using when cold water, hot water, preheated burning：Water flow generator is sent out during using during cold water with preheated burning
Electricity, thermo-electric generation sheet generates electricity during using during hot water with preheated burning.
3) generated energy intelligent management pattern：Power supply monitoring module completes the comprehensive automatic protection to farad capacitor, when
Micro control system battery capacity indication lamp is lighted at check valve when generated energy is not enough.
From the foregoing description of structures and principles it should be understood by those skilled in the art that, not office of the invention
It is limited to above-mentioned embodiment, this hair is all fallen within using the improvement and replacement of techniques well known on the basis of the present invention
Bright protection domain, protection scope of the present invention should limit it by each claim.
Claims (9)
1. a kind of hot water cyclesystem with spontaneous electrical function, it is characterised in that including：Gas heater, hot water circuit dress
Put, some use water spots and the check valve with spontaneous electrical function；
Connected on the water inlet of gas heater into cold water pipe, the hot water circulating device is arranged on the water outlet of gas heater
On mouth；
The check valve includes：Hot water pipeline, cold water pipes, by-pass line, nonreturn valve core, water flow generator, the first temperature are passed
Sensor, microcontroller and the first radio receiving transmitting module, the by-pass line is connected between hot water pipeline and cold water pipes, described
Nonreturn valve core is arranged in by-pass line, current is flowed into cold water pipes from hot water pipeline, and the water flow generator is installed
Powered on cold water pipes for microcontroller, first temperature sensor is arranged on the water inlet end of cold water pipes, described first
Radio receiving transmitting module, the first temperature sensor are all connected with microcontroller signal；
The hot water circulating device includes：Circulating line, second temperature sensor, water pump on circulating line, with
Two temperature sensors, the master controller of water pump signal connection, and the second wireless singal transceiver module being connected with master controller,
The second wireless singal transceiver module communicates with the first wireless signal transceiver module；
The water inlet end of the circulating line and the delivery port of gas heater are connected, and the water side of the circulating line is by going out heat
The hot water pipeline water inlet end connection of water pipe and check valve, the water side of check valve hot water pipeline connects the hot water of distalmost end water spot
Interface, the water side of check valve cold water pipes connects the cold water interface of distalmost end water spot, the water inlet end of check valve cold water pipes
Connected by cold water branch pipe with entering cold water pipe.
2. a kind of hot water cyclesystem with spontaneous electrical function according to claim 1, it is characterised in that in hot-water line
Road is provided with the temperature difference electricity generation device powered for microcontroller.
3. a kind of hot water cyclesystem with spontaneous electrical function according to claim 1, it is characterised in that in microcontroller
The charge and discharge device powered for it is connected with device, the water flow generator is filled by the Voltage stabilizing module that boosts for charge and discharge device
Electricity.
4. a kind of hot water cyclesystem with spontaneous electrical function according to claim 3, it is characterised in that in discharge and recharge
Power supply monitoring module is connected between device and microcontroller.
5. a kind of hot water cyclesystem with spontaneous electrical function according to claim 1, it is characterised in that in circulation pipe
Road is provided with the water flow sensor being connected with master controller.
6. a kind of hot water cyclesystem with spontaneous electrical function according to claim 1, it is characterised in that in circulation pipe
Water tank is serially connected with road.
7. a kind of hot water cyclesystem with spontaneous electrical function according to claim 1, it is characterised in that in main control
Operation display is connected with device, operation display on provided with " switch ", preheating mode switching ", " heating ", " cooling " key.
8. a kind of hot water cyclesystem control method, it is characterised in that be stored with warm-up cycle master controller 01 and 02 liang
Kind of pattern, pipeline start up by preheating condition is：Master controller reads the temperature T of hot water pipeline distalmost end water spot1Go out with gas heater
The temperature T at the mouth of a river2, and carry out following pipeline start up by preheating condition judgment：T2<TIf- 3 DEG C or T1<TIf- Δ T, as long as meeting in both
Any one just controls starting mode of pump, gas heater preheated burning, and Δ T span is 6-10 DEG C；
After starting mode of pump, if 01 pattern of selection, represents timing mode, this is preheated after the pump operation time setting duration is reached
Finish, reenter pipeline start up by preheating condition judgment；If selecting 02 pattern, intelligent mode is represented, works as T1>TIfThis is preheated after -2 DEG C
Finish, reenter pipeline start up by preheating condition judgment.
9. a kind of hot water cyclesystem control method according to claim 8, it is characterised in that store in the host controller
There is 00 pattern, under 00 pattern, master controller only reads the temperature T of gas heater delivery port2, and with T2It is used as pipeline start up by preheating
Condition judgment, works as T2<TIfAt -3 DEG C, control starting mode of pump carries out preheated burning, after the pump operation time setting duration is reached
This preheating is finished, and is rejudged and whether is met pipeline start up by preheating condition T2<TIf-3℃。
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Cited By (8)
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| CN107450625A (en) * | 2017-09-13 | 2017-12-08 | 苏州大学 | Can self power generation current constant temperature electric control gear |
| CN107477845A (en) * | 2017-09-20 | 2017-12-15 | 广东长虹日电科技有限公司 | A kind of the gas heater system and its control method of adjust automatically difference delivery port leaving water temperature |
| CN108548328A (en) * | 2018-02-09 | 2018-09-18 | 何奕 | A kind of constant-temperature effluent, water-saving control system based on gas heater |
| CN109084042A (en) * | 2018-06-27 | 2018-12-25 | 艾欧史密斯(中国)热水器有限公司 | Water valve component, hot-water heating system and control method |
| CN110942607A (en) * | 2019-11-01 | 2020-03-31 | 浙江东胜物联技术有限公司 | Water return device control system based on Bluetooth MESH protocol and control method thereof |
| 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 |
| CN114459157A (en) * | 2022-01-24 | 2022-05-10 | 广东万家乐燃气具有限公司 | Low-power consumption water control terminal and hot-water heating system |
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