CN111412649A - Gas water heater capable of heating and working method thereof - Google Patents

Gas water heater capable of heating and working method thereof Download PDF

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Publication number
CN111412649A
CN111412649A CN202010361485.2A CN202010361485A CN111412649A CN 111412649 A CN111412649 A CN 111412649A CN 202010361485 A CN202010361485 A CN 202010361485A CN 111412649 A CN111412649 A CN 111412649A
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CN
China
Prior art keywords
water
temperature
heating
combustion system
temperature sensor
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Pending
Application number
CN202010361485.2A
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Chinese (zh)
Inventor
卢楚鹏
李学研
王作盛
李罗标
张上兵
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Guangdong Vanward New Electric Co Ltd
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Guangdong Vanward New Electric Co Ltd
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Priority to CN202010361485.2A priority Critical patent/CN111412649A/en
Publication of CN111412649A publication Critical patent/CN111412649A/en
Pending legal-status Critical Current

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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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/523—Heat exchangers for sanitary water directly heated by the burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler

Abstract

A gas water heater capable of heating comprises a heat exchange system and a combustion system in a shell; still include the end of intaking, go out the water end, the return end, inlet end and heating branch road, heat transfer system's water inlet and end of intaking and return end are connected, its delivery port is connected with the one end of going out water end and heating branch road respectively, the other end and the return end of heating branch road are connected, combustion system connects the inlet end, wherein, still include the muddy water branch road, muddy water branch road one end is connected with the end of intaking, the other end passes through the water admixing device and is connected with the pipe connection between the outlet end with two-position three-way valve, be equipped with out water temperature sensor and bathroom temperature sensor on the bathroom water pipeline of water admixing device both sides respectively, still be equipped with the controller on the casing, combustion system, two-position three-way valve, a water pump, water flow sensor, water admixing device, go out water temperature. The invention also provides a working method of the gas water heater. The invention can avoid the scalding of people by high-temperature hot water in bathroom.

Description

Gas water heater capable of heating and working method thereof
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a gas water heater capable of heating and a working method thereof.
Background
When bathing in winter, the temperature of the bathroom is low, particularly under the condition that no warm air exists in the south, and a large amount of water vapor is generated in the bathing process, ventilation needs to be kept, so that people feel cold and can not take a bath comfortably; in order to solve the problems, the gas water heater capable of heating is produced at the same time.
The existing gas water heater capable of heating is provided with a heating loop connected with heating equipment, and before bathing, hot water is supplied to the heating equipment through the heating loop to raise the temperature in a bathroom so as to ensure comfortable bathing. However, in order to heat quickly, the temperature of hot water used during heating is high, when heating is completed and the heating is switched to bathroom, high-temperature hot water still remains in the pipeline and the heat exchange system of the gas water heater, and when the heating is switched to bathing, the high-temperature hot water passes through the bathroom pipeline and is finally discharged through bathroom water equipment, so that people can be easily scalded under careless conditions. Therefore, the safety of temperature switching between heating and bathroom of the gas water heater is one of the problems to be solved.
Disclosure of Invention
The invention provides a gas water heater capable of heating and a working method thereof, aiming at overcoming the defect that when the existing gas water heater capable of heating is switched from heating to a bathroom, high-temperature hot water remained in a pipeline is easy to scald people. The high-temperature water heater is simple in structure and convenient to use, and can cool the high-temperature hot water which is heated and remained in the pipeline to the temperature of water for the bathroom, so that the high-temperature hot water is prevented from scalding people.
In order to solve the technical problems, the invention adopts the technical scheme that: a gas water heater capable of heating comprises a shell, wherein a heat exchange system and a combustion system arranged nearby the heat exchange system are arranged in the shell; the water-saving type solar water heater further comprises a water inlet end, a water outlet end, a water return end, an air inlet end and a heating branch, wherein the water inlet of the heat exchange system is connected with the water inlet end and the water return end, the water outlet of the heat exchange system is connected with the water outlet end and one end of the heating branch through a two-position three-way valve, the other end of the heating branch is connected with the water return end, a heating device and a first one-way valve communicated with the water return end are connected in series on a water return pipeline of the heating branch, a water pump and a water flow sensor are arranged on a pipeline between the water return end and the water inlet of the heat exchange system, the combustion system is connected with the air inlet end, the water-saving type solar water heater further comprises a water mixing branch, one end of the water mixing branch is connected with the water inlet end, the other end of the water mixing branch is connected with a, the third port of the water mixing device is connected with the water outlet end, a bathroom water temperature sensor is arranged on a pipeline between the third port of the water mixing device and the water outlet end, the second port of the two-position three-way valve is connected with one end of a heating branch, the third port of the two-position three-way valve is connected with the water outlet of the heat exchange system, the water mixing device is provided with a water outlet temperature sensor on the pipeline between the water outlet of the heat exchange system, the shell is further provided with a controller, the signal output ends of the water flow sensor, the water outlet temperature sensor and the bathroom water temperature sensor are connected with the signal input end of the controller, and the signal output end of the controller is respectively electrically connected with the control ends of the combustion system, the two-position three-way.
In one preferable scheme, the water-saving device further comprises a zero-cold-water branch, one end of the zero-cold-water branch is connected with the water outlet end, the other end of the zero-cold-water branch is connected with the water return end, and a second one-way valve communicated with the water return end is arranged on the zero-cold-water branch.
In one preferred embodiment, the water mixing device is a water mixing tank. The water mixing tank comprises a tank body, a first water inlet arranged at the top of the tank body, a second water inlet arranged at the bottom of the tank body and a mixed water outlet, a pipeline between the two-position three-way valve and the water outlet end, which is close to one side of the two-position three-way valve, penetrates through the first water inlet and extends into the bottom of the tank body, a pipeline close to one side of the water outlet end penetrates through the mixed water outlet and extends into the top of the tank body, the other end of the water mixing branch is connected with the second water inlet through a valve, and the valve is connected with the controller.
In one preferable scheme, the water mixing device is an electronic water mixing constant temperature regulating valve, the electronic water mixing constant temperature regulating valve is connected with the controller, the electronic water mixing constant temperature regulating valve comprises a first water inlet, a second water inlet and a mixed water outlet, a pipeline between the two-position three-way valve and the water outlet end, which is close to the side of the two-position three-way valve, is connected with the first water inlet, a pipeline between the two-position three-way valve and the water outlet end, which is close to the side of the water outlet end, is connected with the mixed water outlet, and the other end of the water mixing branch is connected with the second water inlet.
In one of them preferred scheme, be equipped with into water temperature sensor on the pipeline between end and the return water end of intaking, be close to on the heating branch road one side of return water end is equipped with heating return water temperature sensor, intake water temperature sensor and heating return water temperature sensor all with the controller is connected.
In one preferable scheme, a bathroom return water temperature sensor is arranged on one side of the zero cold water branch close to the return water end and connected with the controller.
The invention also provides a working method of the gas water heater capable of heating, which comprises the following steps:
s11, electrifying the gas water heater to be in a standby state, selecting a bathroom mode through a controller on the shell, and setting the temperature T of water for the bathroom0And the controller controls the opening of a passage which is connected with the water outlet and the water outlet end of the heat exchange system on the two-position three-way valve.
S12, starting a water using device connected with a water outlet end, and enabling tap water to pass through a water inlet endFlowing into the gas water heater, entering the heat exchange system after passing through the water inlet temperature sensor, the water pump and the water flow sensor, wherein the water pump is not started, and the controller is used for measuring the water inlet temperature T according to the water inlet temperature sensor and the water flow sensor1And the inflow Q1The data of (a) determines whether conditions for starting the combustion system are met.
S13, when the water inlet temperature T is higher than the water inlet temperature1Water flow rate Q1When the water temperature T measured by the water temperature sensor is judged by the controller, the water temperature T measured by the water temperature sensor is measured by the water temperature sensor2Whether or not to match the bathroom water temperature T set in the step S110Matching; when the temperature of the inlet water is T1Water flow rate Q1When the condition that the combustion system is started is not met, the combustion system does not start combustion, the gas water heater cannot be normally used, and troubleshooting or repair may be needed.
S14, if the water temperature T measured by the water outlet temperature sensor2The temperature T of the water for bathroom set in the step S110If the heat load of the combustion system is consistent with the heat load of the combustion system, the water mixing device is kept to be communicated with the water mixing branch; if the water temperature measured by the water outlet temperature sensor is too high, the heat load of the combustion system is reduced, and meanwhile, the water mixing device is communicated with the water mixing branch; if the water temperature measured by the water outlet temperature sensor is lower, the heat load of the combustion system is increased, and meanwhile, the water mixing device is kept not communicated with the water mixing branch; ensuring the temperature of the water flow flowing out of the water outlet of the heat exchange system and the temperature T of the bathroom water set in the step S110And (6) matching.
S15, the hot water continuously flows through the water temperature sensor and the water outlet end of the bathroom, and finally reaches water utilization equipment for users to use.
The invention also provides another working method of the gas water heater capable of heating, which comprises the following steps:
s21, the gas water heater is powered on to be in a standby state, a heating mode is selected through a controller on the shell, the controller controls a channel which is arranged on the two-position three-way valve and connected with a water outlet of the heat exchange system and one end of a heating branch to be opened, and the water utilization equipment is not opened.
S22, starting a water pump, starting a heating function, forming a circulation loop by the water pump, the water flow sensor, the heat exchange system, the water outlet temperature sensor, the two-position three-way valve, the heating equipment, the first one-way valve, the heating return water temperature sensor and the water pump, and driving the water flow in the circulation loop to circularly flow by the water pump.
S23, the controller measures the heating backwater temperature T according to the heating backwater temperature sensor and the water flow sensor5And heating return water flow Q5The data of (2) judging whether the starting condition of the combustion system is met, if the starting condition of the combustion system is met, starting the combustion of the combustion system, realizing the circulation of hot water in a loop, and detecting the water temperature T according to the water outlet temperature sensor2Adjusting the thermal load of the combustion system so that T2Equal to the temperature T required for heatingHeating deviceAnd the constant temperature state of the hot water is maintained, and continuous heating of heating equipment is realized. If the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the heating mode of the gas water heater cannot work normally, and troubleshooting or repair is needed.
The invention also provides another working method of the gas water heater capable of heating, which comprises the following steps:
s31, the gas water heater is powered on to be in a standby state, a zero-cold-water mode is selected through a controller on the shell, the controller controls a channel which is arranged on the two-position three-way valve and connected with a water outlet and a water outlet end of the heat exchange system to be opened, and the water utilization equipment is not opened
S32, starting a water pump, forming a circulation loop by the water pump, the water flow sensor, the heat exchange system, the water outlet temperature sensor, the two-position three-way valve, the water mixing device, the bathroom water temperature sensor, the second one-way valve, the bathroom return water temperature sensor and the water pump, and driving the water flow in the circulation loop to circularly flow by the water pump.
S33, the controller measures the bathroom return water temperature T according to the bathroom return water temperature sensor and the water flow sensor4And bathroom backwater flow Q4The data of (2) judging whether the starting condition of the combustion system is met, if the starting condition of the combustion system is met, starting the combustion of the combustion system, realizing the circulation of hot water in a loop, and detecting the water temperature T according to the water outlet temperature sensor2Adjusting the thermal load of the combustion system so that T2Equal to zero cold water required temperature TZeroAnd the constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance. If the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the zero cold water mode of the gas water heater cannot work normally, and troubleshooting or repair is needed.
The invention also provides another working method of the gas water heater capable of heating, which comprises the following steps:
s41, the gas water heater is powered on to be in a standby state, a heating mode is selected through a controller on the shell, the controller controls a passage which is arranged on the two-position three-way valve and connected with a water outlet of the heat exchange system and one end of the heating branch to be opened, and the water utilization equipment is not opened.
S42, starting a water pump, starting a heating function, forming a circulation loop by the water pump, the water flow sensor, the heat exchange system, the water outlet temperature sensor, the two-position three-way valve, the heating equipment, the first one-way valve, the heating return water temperature sensor and the water pump, and driving the water flow in the circulation loop to circularly flow by the water pump.
S43, the controller measures the heating backwater temperature T according to the heating backwater temperature sensor and the water flow sensor5And heating return water flow Q5The data of (2) judging whether the starting condition of the combustion system is met, if the starting condition of the combustion system is met, starting the combustion of the combustion system, realizing the circulation of hot water in a loop, and detecting the water temperature T according to the water outlet temperature sensor2Adjusting the thermal load of the combustion system so that T2Equal to the temperature T required for heatingHeating deviceThe constant temperature state of the hot water is maintained, and the continuous heating of the heating equipment is realized(ii) a If the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the heating mode of the gas water heater cannot work normally, and troubleshooting or repair is needed.
And S44, after the temperature of the bathroom is raised to a certain value by the heating equipment, switching the heating mode to a bathroom mode or a zero-cold-water mode through the controller on the shell, and if the heating mode is switched to the bathroom mode, entering the step S45, and if the heating mode is switched to the zero-cold-water mode, entering the step S50.
S45, setting the temperature T of water for the bathroom0The controller controls the opening of a passage which is connected with the water outlet and the water outlet end of the heat exchange system on the two-position three-way valve, and controls the closing of a passage which is connected with the water outlet and one end of the heating branch on the two-position three-way valve.
S46, starting a water using device connected to a water outlet end, enabling tap water to flow into the gas water heater through the water inlet end, enabling the tap water to enter a heat exchange system after passing through the water inlet temperature sensor, the water pump and the water flow sensor, enabling the water pump not to be started at the moment, and enabling the controller to detect the water inlet temperature T according to the water inlet temperature sensor and the water flow sensor1And the inflow Q1The data of (a) determines whether conditions for starting the combustion system are met.
S47, when the water inlet temperature T is higher1Water flow rate Q1When the conditions of starting the combustion system are met, the combustion system continues to keep burning, and at the moment, water flow enters the heat exchange system and exchanges heat with high-temperature flue gas generated by burning of the combustion system to become hot water; then the hot water and the heating hot water remained in the heat exchange system and the upstream pipeline of the two-position three-way valve in the heating mode sequentially flow out of the water outlet of the heat exchange system to the water outlet temperature sensor and then flow through the two-position three-way valve to reach the water mixing device, and the controller judges the water temperature T measured by the water outlet temperature sensor2Whether the temperature T is equal to the set water temperature T for the bathroom0Matching; when the temperature of the inlet water is T1Water flow rate Q1When the condition that the combustion system is started is not met, the combustion system does not start combustion, the gas water heater cannot be normally used, and troubleshooting or repair may be needed.
S48, if the water temperature T measured by the water temperature sensor is lower than the water temperature T measured by the water temperature sensor2The temperature T of the water for bathroom set in the step S450If the heat load of the combustion system is consistent with the heat load of the combustion system, the water mixing device is kept to be communicated with the water mixing branch; if the water temperature measured by the water outlet temperature sensor is too high, the heat load of the combustion system is reduced, and meanwhile, the water mixing device is communicated with the water mixing branch; if the water temperature measured by the water outlet temperature sensor is lower, the heat load of the combustion system is increased, and meanwhile, the water mixing device is kept not communicated with the water mixing branch; ensuring the temperature of the water flow flowing out of the water outlet of the heat exchange system and the temperature T of the bathroom water set in the step S450And (6) matching.
And S49, the hot water continuously flows through the water temperature sensor and the water outlet end of the bathroom, and finally reaches water utilization equipment for users to use.
S50, the controller controls a passage on the two-position three-way valve, which is connected with the water outlet and the water outlet end of the heat exchange system, to be opened, and controls a passage on the two-position three-way valve, which is connected with the water outlet of the heat exchange system and one end of the heating branch to be closed.
S51, a water pump, a water flow sensor, a heat exchange system, an outlet water temperature sensor, a two-position three-way valve, a water mixing device, a bathroom water temperature sensor, a second one-way valve, a bathroom return water temperature sensor and the water pump form a circulation loop, and the water pump drives water in the circulation loop to circularly flow.
S52, the controller measures the bathroom return water temperature T according to the bathroom return water temperature sensor and the water flow sensor4And bathroom backwater flow Q4The data of (1) judging whether the starting condition of the combustion system is met, if so, judging the water temperature T detected by the water temperature sensor2Whether the temperature T is equal to the required temperature T of zero cold waterZeroIf T is matched2≤TZeroThen the flow proceeds to step S53, if T is reached2＞TZeroThen, go to step S54; if the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the gas water heater cannot work normally in a zero cold water mode, and fault troubleshooting is needed orAnd (6) repairing.
S53, the combustion system continues to burn, hot water is circulated in the loop, and the hot water is detected according to the water temperature T detected by the water outlet temperature sensor2Adjusting the thermal load of the combustion system so that T2Equal to zero cold water required temperature TZeroAnd the constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance.
S54, stopping combustion of the combustion system, circulating hot water in a loop, and cooling the water to T2≤TZeroWhen the water temperature T detected by the water outlet temperature sensor is higher than the set temperature T, the combustion system restarts combustion2Adjusting the thermal load of the combustion system so that T2Equal to zero cold water required temperature TZeroAnd the constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance.
Compared with the prior art, the invention has the beneficial effects that:
the bathroom water heater is provided with a water mixing branch, one end of the water mixing branch is connected with a water inlet end, the other end of the water mixing branch is connected with a pipeline between a two-position three-way valve and a water outlet end through a water mixing device, a water outlet temperature sensor is arranged on the pipeline between the water mixing device and a water outlet of a heat exchange system, and a bathroom water temperature sensor is arranged on the pipeline between the water mixing device and the water outlet end; thus, when the water temperature T detected by the water temperature sensor is detected2Temperature T exceeding set bathroom water temperature0When the temperature of the cold water exceeds T, the water mixing branch can be communicated with the water mixing device, so that the cold water and the temperature in the water mixing branch exceed T0The hot water is mixed and adjusted in temperature at the water mixing device, so as to ensure the temperature and T of the water flow coming out from the mixed water outlet of the water mixing device0Accordingly, the risk that people are scalded by high-temperature hot water when the heating is switched to the bathroom can be avoided.
Drawings
Fig. 1 is a schematic view of the overall structure of the gas water heater capable of heating in the invention.
FIG. 2 is a schematic view of the water flow direction in the bathroom mode of the heatable gas water heater of the present invention.
FIG. 3 is a schematic flow chart of the operation method of the gas water heater in the bathroom mode.
FIG. 4 is a schematic view of the flow of water in the heating mode of the gas heatable water heater of the present invention.
FIG. 5 is a flow chart of the operation method of the gas water heater in heating mode.
FIG. 6 is a schematic diagram of the flow of water in the zero cold water mode of the gas heatable water heater of the present invention.
FIG. 7 is a flow chart of the operation method of the gas water heater with heating function in the zero cold water mode.
FIG. 8 is a schematic view of the water flow direction in the bathroom mode of the gas water heater with heating function according to the present invention.
Fig. 9 is a schematic structural view of the electronic mixing thermostatic regulating valve of the invention.
Fig. 10 is a schematic view of the structure of the water mixing tank of the present invention.
In the figure, 1-heat exchange system, 2-combustion system, 3-water inlet end, 4-water outlet end, 5-water return end, 6-air inlet end, 7-heating branch, 8-two-position three-way valve, 9-heating equipment, 10-first one-way valve, 11-water pump, 12-water flow sensor, 13-water mixing branch, 14-water mixing device, 15-water outlet temperature sensor, 16-bathroom water temperature sensor, 17-zero cold water branch, 18-second one-way valve, 19-water inlet temperature sensor, 20-heating water return temperature sensor, 21-bathroom water return temperature sensor, 22-water equipment, 141-first water inlet, 142-second water inlet, 143-mixed water outlet, 144-tank, 145-valve.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
As shown in figure 1, the gas water heater capable of heating comprises a shell, wherein heat exchange is arranged in the shellThe system comprises a system 1 and a combustion system 2 arranged near the heat exchange system 1, wherein the combustion system 2 is used for supplying heat to the heat exchange system 1; the water-saving heating device is characterized by further comprising a water inlet end 3 used for connecting tap water, a water outlet end 4 used for discharging bath water, a water return end 5 used for returning water, a gas inlet end 6 used for connecting a gas source and a heating branch 7, wherein a water inlet of the heat exchange system 1 is connected with the water inlet end 3 and the water return end 5, a water outlet of the heat exchange system 1 is connected with the water outlet end 4 and one end of the heating branch 7 through a two-position three-way valve 8, the other end of the heating branch 7 is connected with the water return end 5, a heating device 9 and a first one-way valve 10 communicated with the water return end 5 are arranged on a water return pipeline of the heating branch 7 in series, the heating device 9 is installed in a bathroom, a water pump 11 and a water flow sensor 12 are arranged on a pipeline between the water return end 5 and the water inlet of the heat exchange system 1, the combustion system 2, the water heater further comprises a water mixing branch 13, one end of the water mixing branch 13 is connected with the water inlet end 3 through a tee joint, the other end of the water mixing branch 13 is connected with a first port of a water mixing device 14, a second port of the water mixing device 14 is connected with a first port of the two-position three-way valve 8, a third port of the water mixing device 14 is connected with the water outlet end 4, a bathroom water temperature sensor 16 is arranged on a pipeline between the third port of the water mixing device 14 and the water outlet end 4, a second port of the two-position three-way valve 8 is connected with one end of the heating branch 7, a third port of the two-position three-way valve 8 is connected with a water outlet of the heat exchange system 1, a water outlet temperature sensor 15 is arranged on a pipeline between the water mixing device 14 and the water outlet of the heat exchange system 1, the shell is further provided with a controller, and signal output ends of the water flow sensor 12, the water outlet temperature sensor, the signal output end of the controller is respectively and electrically connected with the control ends of the combustion system 2, the two-position three-way valve 8, the water pump 11 and the water mixing device 14. In this way, the outlet water temperature sensor 15 and the bathroom water temperature sensor 16 can monitor the temperature of the hot water from the outlet of the heat exchange system 1 and the temperature of the hot water going to the outlet end 4 in real time, and transmit the detected data to the controller. When the outlet water temperature sensor 15 detects that the temperature of the hot water flowing out from the water outlet of the heat exchange system 1 exceeds the temperatureWhen the temperature of the bathroom water set by the user is exceeded, the controller can control the water mixing device 14 to be communicated with the water mixing branch 13, so that the cold water in the water mixing branch 13 enters the water mixing device 14 to be mixed with the hot water coming out from the heat exchange system 1 for temperature regulation, and the temperature of the mixed water coming out from the water mixing device 14 is close to the temperature of the bathroom water set by the user. The data detected by the bathroom water temperature sensor 16 can enable the controller to better control the amount of cold water conveyed to the water mixing device 14 by the water mixing branch 13, so as to ensure that the temperature of mixed water coming out of the water mixing device 14 is more accurately close to the temperature of bathroom water set by a user; in addition, the data detected by the bathroom water temperature sensor 16 is also the real-time temperature T of the bathroom outlet water3The confirmation of the temperature of the water mixing device 14 after mixing can be visible to the user, and the controller can control the amount of cold water entering the water mixing device 14 through the water mixing branch. Therefore, high-temperature hot water exceeding the temperature of water for bathroom use cannot be generated, and particularly, the high-temperature hot water remained on the pipeline when the gas water heater for heating is switched to bathroom by heating is sprayed out from the water outlet end 4 to scald people, so that the gas water heater for heating is safer to use and more comfortable to bathe.
In one embodiment, as shown in fig. 1, the water dispenser further includes a zero-cold-water branch 17, one end of the zero-cold-water branch 17 is connected to the water outlet end 4, the other end of the zero-cold-water branch 17 is connected to the water return end 5, and a second check valve 18 that is communicated with the water return end 5 is disposed on the zero-cold-water branch 17. Thus, the zero cold water branch 17 can circularly preheat cold water which is already present in a pipeline between the heat exchange system 1 and the water outlet end 4 before the gas water heater is started, so that bathroom water with a proper temperature can be used when a user starts the gas water heater, and bathroom discomfort experience caused by the presence of the cold water can be avoided.
In one embodiment, the mixing device 14 is a mixing tank. As shown in fig. 10, the water mixing tank includes a tank body 144, a first water inlet 141 disposed at the top of the tank body 144, a second water inlet 142 disposed at the bottom of the tank body 144, and a mixed water outlet 143, wherein a pipeline between the two-position three-way valve 8 and the water outlet 4 extends to the bottom of the tank body 144 through the first water inlet 141, a pipeline on a side close to the two-position three-way valve 8 extends to the top of the tank body 144 through the mixed water outlet 143, the other end of the water mixing branch 13 is connected to the second water inlet 142 through a valve 145, the valve 145 is connected to the controller, and the valve 145 is normally closed and is controlled to open only when necessary. The water mixing tank provides a buffer space for water mixing due to the tank body 144, and a certain time is provided to ensure that high-temperature hot water and cold water are mixed in the tank body 144 to reach the bathroom water temperature set by a user and then are discharged from the mixed water outlet 143, so that the control is relatively precise without using, and the cost is relatively low.
In one embodiment, the water mixing device 14 is an electronic water mixing thermostatic regulating valve, the electronic water mixing thermostatic regulating valve is connected with the controller, as shown in fig. 9, the electronic water mixing thermostatic regulating valve includes a first water inlet 141, a second water inlet 142 and a mixed water outlet 143, the first water inlet 141 and the mixed water outlet 143 are normally open, the second water inlet 142 is normally closed, a pipe between the two-position three-way valve 8 and the water outlet 4 on a side close to the two-position three-way valve 8 is connected with the first water inlet 141, a pipe between the two-position three-way valve 8 and the water outlet 4 on a side close to the water outlet 4 is connected with the mixed water outlet 143, and the other end of the water mixing branch 13 is connected with the second water inlet 142. When the electronic mixed water constant temperature regulating valve is adopted, the temperature of water for the bathroom set by a user is required to be reached at the moment that high-temperature hot water and cold water enter the electronic mixed water constant temperature regulating valve to be mixed due to no buffer space, and then the water is discharged from the mixed water outlet 143, so that the water can be controlled very accurately, and the cost is relatively high.
In one embodiment, as shown in fig. 1, a water inlet temperature sensor 19 is disposed on a pipeline between the water inlet end 3 and the water return end 5, the water inlet temperature sensor 19 is used for detecting the water inlet temperature, and the detected temperature is one of the conditions for starting the combustion system 2 for safety; a heating return water temperature sensor 20 is arranged on one side of the heating branch 7 close to the return water end 5, and the heating return water temperature sensor 20 is used for detecting the temperature of heating hot water after passing through the heating equipment 9 and controlling the combustion load of the combustion system 2; and the water inlet temperature sensor 19 and the heating water return temperature sensor 20 are both connected with the controller.
In one embodiment, as shown in fig. 1, a bathroom return water temperature sensor 21 is disposed on a side of the zero-cold-water branch 17 close to the return water end 5, the bathroom return water temperature sensor 21 is configured to detect a zero-cold-water waterway return water temperature for controlling a combustion load of the combustion system 2, and the bathroom return water temperature sensor 21 is connected to the controller.
As another embodiment, as shown in fig. 3, a method for operating a heatable gas water heater includes the steps of:
s11, electrifying the gas water heater to be in a standby state, selecting a bathroom mode through a controller on the shell, and setting the temperature T of water for the bathroom0And the controller controls the opening of a passage which is connected with the water outlet and the water outlet end 4 of the heat exchange system 1 on the two-position three-way valve 8.
S12, starting a water utilization device 22 connected to a water outlet end 4, enabling tap water to flow into the gas water heater through a water inlet end 3, enabling the tap water to enter the heat exchange system 1 after passing through a water inlet temperature sensor 19, a water pump 11 and a water flow sensor 12, enabling the water pump 11 not to be started at the moment, and enabling a controller to detect water inlet temperature T according to the water inlet temperature measured by the water inlet temperature sensor 19 and the water flow sensor 121And the inflow Q1Determines whether the conditions for starting the combustion system 2 are met.
S13, when the water inlet temperature T is higher than the water inlet temperature1Water flow rate Q1When the conditions of the starting of the combustion system 2 are met, the combustion system 2 starts combustion, at the moment, water flows into the heat exchange system 1 and exchanges heat with high-temperature flue gas generated by the combustion of the combustion system 2 to become hot water, then the hot water flows out of a water outlet of the heat exchange system 1 to the water outlet temperature sensor 15 and then flows to the water mixing device 14 through the two-position three-way valve 8, and the controller judges the water temperature T measured by the water outlet temperature sensor 152Whether or not to match the bathroom water temperature T set in the step S110Matching; when the temperature of the inlet water is T1Water flow rate Q1In the event that the conditions for start-up of the combustion system 2 are not met,the combustion system 2 does not start combustion, the gas water heater cannot be normally used, and troubleshooting or repair may be required.
S14, if the water temperature T measured by the water temperature sensor 15 is lower than the preset value2The temperature T of the water for bathroom set in the step S110In line with this, the thermal load of the combustion system 2 is maintained, while the water mixing device 14 is kept out of communication with the water mixing branch 13; if the water temperature measured by the outlet water temperature sensor 15 is too high, the heat load of the combustion system 2 is reduced, and the water mixing device 14 is communicated with the water mixing branch 13; if the water temperature measured by the outlet water temperature sensor 15 is lower, the heat load of the combustion system 2 is increased, and meanwhile, the water mixing device 14 is kept not communicated with the water mixing branch 13; ensuring the temperature of the water flow flowing out from the water outlet of the heat exchange system 1 and the temperature T of the bathroom water set in the step S110And (6) matching.
S15, hot water continuously flows through the bathroom water temperature sensor 16 and the water outlet end 4 and finally reaches the water utilization equipment 22 for users to use, and the flow direction of the water flow is shown in figure 2.
As another embodiment, as shown in fig. 5, a method for operating a heatable gas water heater includes the steps of:
and S21, the gas water heater is powered on to be in a standby state, a heating mode is selected through a controller on the shell, the temperature of hot water required by the heating mode is generally fixedly set when the gas water heater leaves a factory, for example, 60 ℃, the controller controls a passage on the two-position three-way valve 8, which is connected with the water outlet of the heat exchange system 1 and one end of the heating branch 7, to be opened, and the water utilization equipment 22 is not opened.
S22, starting a water pump 11, starting a heating function, forming a circulation loop by the water pump 11, the water flow sensor 12, the heat exchange system 1, the water outlet temperature sensor 15, the two-position three-way valve 8, the heating equipment 9, the first one-way valve 10, the heating return water temperature sensor 20 and the water pump 11, and driving water flow in the circulation loop to circularly flow by the water pump 11.
S23, the controller measures the heating backwater temperature T according to the heating backwater temperature sensor 20 and the water flow sensor 125And heating return water flow Q5Whether the data of (2) are in accordance with the starting condition of the combustion system or not is judged, and if so, the data of (2) are in accordance with the combustionThe starting condition of the system 2 is that the combustion system 2 starts combustion, hot water realizes circulation in a loop and the water temperature T detected by the water outlet temperature sensor 152Adjusting the thermal load of the combustion system 2 such that T2Equal to the temperature T required for heatingHeating deviceAnd the constant temperature state of the hot water is maintained, and the continuous heating of the heating equipment 9 is realized. If the starting condition of the combustion system 2 is not met, the combustion system 2 does not start combustion until the starting condition of the combustion system 2 is met; if the starting condition of the combustion system 2 is not met, the heating mode of the gas water heater cannot work normally, and troubleshooting or repair is needed. The water flow direction is shown in figure 4.
As another embodiment, as shown in fig. 7, a method for operating a heatable gas water heater includes the steps of:
and S31, the gas water heater is powered on to be in a standby state, a zero-cold-water mode is selected through a controller on the shell, the temperature of hot water required by the zero-cold-water mode is generally fixed and set when the gas water heater leaves a factory, for example, 35 ℃, the controller controls a passage on the two-position three-way valve 8, which is connected with a water outlet of the heat exchange system 1 and the water outlet end 4, to be opened, and the water utilization equipment 22 is not opened.
S32, starting the water pump 11, forming a circulating loop by the water pump 11, the water flow sensor 12, the heat exchange system 1, the water outlet temperature sensor 15, the two-position three-way valve 8, the water mixing device 14, the bathroom water temperature sensor 16, the second one-way valve 18, the bathroom return water temperature sensor 21 and the water pump 11, and driving the water flow in the circulating loop to circularly flow by the water pump 11.
S33, the controller measures the bathroom return water temperature T according to the bathroom return water temperature sensor 21 and the water flow sensor 124And bathroom backwater flow Q4The data of (2) judges whether the starting condition of the combustion system 2 is met, if the starting condition of the combustion system 2 is met, the combustion system 2 starts combustion, hot water realizes circulation in a loop, and the water temperature T detected by the water outlet temperature sensor 15 is used for detecting the water temperature T2Adjusting the thermal load of the combustion system 2 such that T2Equal to zero cold water required temperature TZeroAnd the constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance. If not conforming to the combustion systemIf the system 2 is in the starting condition, the combustion system 2 does not start combustion until the starting condition of the combustion system 2 is met; if the starting condition of the combustion system 2 is not met, the zero cold water mode of the gas water heater cannot work normally, and troubleshooting or repair is needed. The water flow direction is shown in figure 6.
As another embodiment, a method for operating a heatable gas water heater, comprising the steps of:
s41, the gas water heater is powered on to be in a standby state, a heating mode is selected through a controller on the shell, the controller controls a channel which is arranged on the two-position three-way valve 8 and connected with a water outlet of the heat exchange system 1 and one end of the heating branch 7 to be opened, and the water utilization equipment 22 is not opened.
S42, starting the water pump 11, starting a heating function, forming a circulation loop by the water pump 11, the water flow sensor 12, the heat exchange system 1, the water outlet temperature sensor 15, the two-position three-way valve 8, the heating equipment 9, the first one-way valve 10, the heating return water temperature sensor 20 and the water pump 11, and driving the water flow in the circulation loop to circularly flow by the water pump 11.
S43, the controller measures the heating backwater temperature T according to the heating backwater temperature sensor 20 and the water flow sensor 125And heating return water flow Q5The data of (2) judges whether the starting condition of the combustion system 2 is met, if the starting condition of the combustion system 2 is met, the combustion system 2 starts combustion, hot water realizes circulation in a loop, and the water temperature T detected by the water outlet temperature sensor 15 is used for detecting the water temperature T2Adjusting the thermal load of the combustion system 2 such that T2Equal to the temperature T required for heatingHeating deviceThe constant temperature state of the hot water is maintained, and the continuous heating of the heating equipment 9 is realized; if the starting condition of the combustion system 2 is not met, the combustion system 2 does not start combustion until the starting condition of the combustion system 2 is met; if the starting condition of the combustion system 2 is not met, the heating mode of the gas water heater cannot work normally, and troubleshooting or repair is needed.
And S44, after the temperature of the bathroom is raised to a certain value by the heating equipment 9, switching the heating mode to a bathroom mode or a zero-cold-water mode through the controller on the shell, and if the heating mode is switched to the bathroom mode, entering the step S45, and if the heating mode is switched to the zero-cold-water mode, entering the step S50.
S45, setting the temperature T of water for the bathroom0The controller controls the passage on the two-position three-way valve 8, which is connected with the water outlet and the water outlet end 4 of the heat exchange system 1, to be opened, and controls the passage on the two-position three-way valve 8, which is connected with the water outlet of the heat exchange system 1 and one end of the heating branch 7 to be closed.
S46, starting the water utilization equipment 22 connected to the water outlet end 4, enabling tap water to flow into the gas water heater through the water inlet end 3, and then to enter the heat exchange system 1 after passing through the water inlet temperature sensor 19, the water pump 11 and the water flow sensor 12, wherein the water pump 11 is not started at the moment, and the controller is used for detecting the water inlet temperature T according to the water inlet temperature sensor 19 and the water flow sensor 121And the inflow Q1Determines whether the conditions for starting the combustion system 2 are met.
S47, when the water inlet temperature T is higher1Water flow rate Q1When the conditions of starting the combustion system 2 are met, the combustion system 2 continues to keep burning, and at the moment, water flow enters the heat exchange system 1 and exchanges heat with high-temperature flue gas generated by burning of the combustion system 2 to become hot water; then the hot water and the heating hot water remained in the upstream pipelines of the heat exchange system 1 and the two-position three-way valve 8 in the heating mode sequentially flow out from the water outlet of the heat exchange system 1 to the water outlet temperature sensor 15 and then flow through the two-position three-way valve 8 to the water mixing device 14, and the controller judges the water temperature T measured by the water outlet temperature sensor 152Whether the temperature T is equal to the set water temperature T for the bathroom0Matching; when the temperature of the inlet water is T1Water flow rate Q1When the condition that the combustion system 2 is started is not met, the combustion system 2 does not start combustion, the gas water heater cannot be normally used, and troubleshooting or repair may be needed.
S48, if the water temperature T measured by the water temperature sensor 15 is lower than the water temperature T2The temperature T of the water for bathroom set in the step S450In line with this, the thermal load of the combustion system 2 is maintained, while the water mixing device 14 is kept out of communication with the water mixing branch 13; if the water temperature measured by the outlet water temperature sensor 15 is too high, the heat load of the combustion system 2 is reduced, and the water mixing device 14 is communicated with the water mixing branch 13; if the water temperature measured by the outlet water temperature sensor 15 is lowerThe heat load of the combustion system 2 is increased, and the water mixing device 14 is kept not communicated with the water mixing branch 13; ensuring the temperature of the water flow flowing out from the water outlet of the heat exchange system 1 and the temperature T of the bathroom water set in the step S450And (6) matching.
And S49, the hot water continuously flows through the bathroom water temperature sensor 16 and the water outlet end 4 and finally reaches the water utilization equipment 22 for users to use.
S50, the controller controls a passage on the two-position three-way valve 8, which is connected with the water outlet and the water outlet end 4 of the heat exchange system 1, to be opened, and controls a passage on the two-position three-way valve 8, which is connected with the water outlet of the heat exchange system 1 and one end of the heating branch 7, to be closed.
S51, a water pump 11, a water flow sensor 12, a heat exchange system 1, an outlet water temperature sensor 15, a two-position three-way valve 8, a water mixing device 14, a bathroom water temperature sensor 16, a second one-way valve 18, a bathroom return water temperature sensor 21 and the water pump 11 form a circulation loop, and the water pump 11 drives water flow in the circulation loop to circularly flow.
S52, the controller measures the bathroom return water temperature T according to the bathroom return water temperature sensor 21 and the water flow sensor 124And bathroom backwater flow Q4Whether the starting condition of the combustion system 2 is met or not is judged, and if the starting condition of the combustion system 2 is met, the water temperature T detected by the water temperature sensor 15 is judged2Whether the temperature T is equal to the required temperature T of zero cold waterZeroIf T is matched2≤TZeroThen the flow proceeds to step S53, if T is reached2＞TZeroThen, go to step S54; if the starting condition of the combustion system 2 is not met, the combustion system 2 does not start combustion until the starting condition of the combustion system 2 is met; if the starting condition of the combustion system 2 is not met, the zero cold water mode of the gas water heater cannot work normally, and troubleshooting or repair is needed. The water flow direction is shown in figure 8.
S53, the combustion system 2 continues to burn, hot water is circulated in a loop, and the hot water is detected according to the water temperature T detected by the water outlet temperature sensor 152Adjusting the thermal load of the combustion system 2 such that T2Equal to zero cold water required temperature TZeroTo maintain the constant temperature state of hot water and realize continuous bathroom liftingAnd preheating.
S54, the combustion system 2 stops combustion, hot water is circulated in a loop, and the water is cooled to T2≤TZeroIn time, the combustion system 2 restarts combustion and based on the water temperature T detected by the outlet water temperature sensor 152Adjusting the thermal load of the combustion system 2 such that T2Equal to zero cold water required temperature TZeroAnd the constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance.
In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A gas water heater capable of heating comprises a shell, wherein a heat exchange system (1) and a combustion system (2) arranged near the heat exchange system (1) are arranged inside the shell; the water-saving heat exchanger is characterized by further comprising a water inlet end (3), a water outlet end (4), a water return end (5), an air inlet end (6) and a heating branch (7), wherein a water inlet of the heat exchange system (1) is connected with the water inlet end (3) and the water return end (5), a water outlet of the heat exchange system (1) is connected with the water outlet end (4) and one end of the heating branch (7) through a two-position three-way valve (8), the other end of the heating branch (7) is connected with the water return end (5), a heating device (9) and a first one-way valve (10) communicated with the water return end (5) are arranged on a water return pipeline of the heating branch (7) in series, a water pump (11) and a water flow sensor (12) are arranged on a pipeline between the water return end (5) and the water inlet of the heat exchange system (1), and the combustion system (2) is connected with the air, the water heater is characterized by further comprising a water mixing branch (13), one end of the water mixing branch (13) is connected with the water inlet end (3), the other end of the water mixing branch (13) is connected with a first port of a water mixing device (14), a second port of the water mixing device (14) is connected with a first port of the two-position three-way valve (8), a third port of the water mixing device (14) is connected with the water outlet end (4), a bathroom water temperature sensor (16) is arranged on a pipeline between the third port of the water mixing device (14) and the water outlet end (4), the second port of the two-position three-way valve (8) is connected with one end of the heating branch (7), the third port of the two-position three-way valve (8) is connected with a water outlet of the heat exchange system (1), a water outlet temperature sensor (15) is arranged on a pipeline between the water mixing device (14) and the water outlet of the heat exchange system (1), and a controller is further arranged on, the signal output ends of the water flow sensor (12), the water outlet temperature sensor (15) and the bathroom water temperature sensor (16) are connected with the signal input end of the controller, and the signal output end of the controller is respectively and electrically connected with the control ends of the combustion system (2), the two-position three-way valve (8), the water pump (11) and the water mixing device (14).
2. The heatable gas water heater according to claim 1, further comprising a zero cold water branch (17), wherein one end of the zero cold water branch (17) is connected to the water outlet end (4), the other end of the zero cold water branch (17) is connected to the water return end (5), and a second check valve (18) which is communicated with the water return end (5) is disposed on the zero cold water branch (17).
3. Heatable gas water heater according to claim 1 or 2, characterized in that the water mixing device (14) is a water mixing tank, the water mixing tank comprises a tank body (144), a first water inlet (141) arranged at the top of the tank body (144), a second water inlet (142) arranged at the bottom of the tank body (144) and a mixed water outlet (143), the pipeline between the two-position three-way valve (8) and the water outlet end (4) on the side close to the two-position three-way valve (8) penetrates through the first water inlet (141) and extends into the bottom of the interior of the tank body (144), the pipeline on the side close to the water outlet end (4) penetrates through the mixed water outlet (143) and extends into the top of the interior of the tank body (144), the other end of the water mixing branch (13) is connected with the second water inlet (142) through a valve (145), and the valve (145) is connected with the controller.
4. The heatable gas water heater according to claim 1 or 2, wherein the water mixing device (14) is an electronic water mixing thermostatic regulating valve, the electronic water mixing thermostatic regulating valve is connected with the controller, the electronic water mixing thermostatic regulating valve comprises a first water inlet (141), a second water inlet (142) and a mixed water outlet (143), a pipeline between the two-position three-way valve (8) and the water outlet end (4) on the side close to the two-position three-way valve (8) is connected with the first water inlet (141), a pipeline on the side close to the water outlet end (4) is connected with the mixed water outlet (143), and the other end of the water mixing branch (13) is connected with the second water inlet (142).
5. The heatable gas water heater according to claim 1 or 2, wherein a water inlet temperature sensor (19) is arranged on a pipeline between the water inlet end (3) and the water return end (5), a heating water return temperature sensor (20) is arranged on one side of the heating branch (7) close to the water return end (5), and the water inlet temperature sensor (19) and the heating water return temperature sensor (20) are both connected with the controller.
6. The heatable gas water heater according to claim 2, wherein a bathroom return water temperature sensor (21) is provided on the zero cold water branch (17) on a side close to the return water end (5), the bathroom return water temperature sensor (21) being connected to the controller.
7. The working method of the gas water heater capable of heating is characterized by comprising the following steps:
s11, electrifying the gas water heater to be in a standby state, selecting a bathroom mode through a controller on the shell, and setting the temperature T of water for the bathroom0The controller controls two bits and three bitsThe channel on the through valve (8) which is connected with the water outlet and the water outlet end (4) of the heat exchange system (1) is opened;
s12, starting a water using device (22) connected to a water outlet end (4), enabling tap water to flow into the gas water heater through a water inlet end (3), enter the heat exchange system (1) after passing through a water inlet temperature sensor (19), a water pump (11) and a water flow sensor (12), and enabling the water pump (11) not to be started at the moment, wherein the controller is used for detecting the water inlet temperature T according to the water inlet temperature sensor (19) and the water flow sensor (12)1And the inflow Q1Judging whether the data meet the starting condition of the combustion system (2);
s13, when the water inlet temperature T is higher than the water inlet temperature1Water flow rate Q1When the starting conditions of the combustion system (2) are met, the combustion system (2) starts to burn, at the moment, water flows into the heat exchange system (1) and exchanges heat with high-temperature flue gas generated by combustion of the combustion system (2) to become hot water, then the hot water flows out of a water outlet of the heat exchange system (1) to the water outlet temperature sensor (15), then the hot water flows through the two-position three-way valve (8) to reach the water mixing device (14), and the controller judges the water temperature T measured by the water outlet temperature sensor (15)2Whether or not to match the bathroom water temperature T set in the step S110Matching; when the temperature of the inlet water is T1Water flow rate Q1When the condition that the combustion system is started is not met, the combustion system does not start combustion, the gas water heater cannot be normally used, and troubleshooting or repair may be needed;
s14, if the water temperature T measured by the water outlet temperature sensor (15)2The temperature T of the water for bathroom set in the step S110If the difference is positive, the thermal load of the combustion system (2) is maintained, and the water mixing device (14) is not communicated with the water mixing branch (13); if the water temperature measured by the water outlet temperature sensor (15) is too high, the heat load of the combustion system (2) is reduced, and meanwhile, the water mixing device (14) is communicated with the water mixing branch (13); if the water temperature measured by the water outlet temperature sensor (15) is lower, the heat load of the combustion system (2) is increased, and meanwhile, the water mixing device (14) is kept to be communicated with the water mixing branch (13); ensuring the temperature of the water flow flowing out of the water outlet of the heat exchange system (1) and the temperature T of the bathroom water set in the step S110Matching;
s15, hot water continuously flows through the bathroom water temperature sensor (16) and the water outlet end (4) and finally reaches the water utilization equipment (22) for users to use.
8. The working method of the gas water heater capable of heating is characterized by comprising the following steps:
s21, electrifying the gas water heater to be in a standby state, selecting a heating mode through a controller on a shell, controlling a passage on a two-position three-way valve (8) connected with a water outlet of the heat exchange system (1) and one end of a heating branch (7) to be opened by the controller, and not opening a water utilization device (22);
s22, starting a water pump (11), starting a heating function, starting the water pump (11), namely a water flow sensor (12), a heat exchange system (1), a water outlet temperature sensor (15), a two-position three-way valve (8), a heating device (9), a first one-way valve (10), a heating return water temperature sensor (20) and the water pump (11) to form a circulation loop, wherein the water pump (11) drives water flow in the circulation loop to circularly flow;
s23, the controller measures the heating backwater temperature T according to the heating backwater temperature sensor (20) and the water flow sensor (12)5And heating return water flow Q5The data of (2) is judged whether to accord with the starting condition of the combustion system (2), if the starting condition of the combustion system (2) is met, the combustion system (2) starts combustion, hot water realizes circulation in a loop, and the water temperature T detected by the water outlet temperature sensor (15) is used for detecting the water temperature T2Adjusting the thermal load of the combustion system (2) such that T2Equal to the temperature T required for heatingHeating deviceThe constant temperature state of the hot water is maintained, and the continuous heating of the heating equipment (9) is realized; if the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the heating mode of the gas water heater cannot work normally, and troubleshooting or repair is needed.
9. The working method of the gas water heater capable of heating is characterized by comprising the following steps:
s31, the gas water heater is powered on to be in a standby state, a zero cold water mode is selected through a controller on the shell, the controller controls a channel, connected with a water outlet and a water outlet end (4) of the heat exchange system (1), on the two-position three-way valve (8) to be opened, and the water using equipment (22) is not opened;
s32, starting a water pump (11), namely starting the water pump (11), namely a water flow sensor (12), a heat exchange system (1), a water outlet temperature sensor (15), a two-position three-way valve (8), a water mixing device (14), a bathroom water temperature sensor (16), a second one-way valve (18), a bathroom return water temperature sensor (21) and the water pump (11) to form a circulation loop, wherein the water pump (11) drives water in the circulation loop to circularly flow;
s33, the controller measures the bathroom backwater temperature T according to the bathroom backwater temperature sensor (21) and the water flow sensor (12)4And bathroom backwater flow Q4The data of (2) is judged whether to accord with the starting condition of the combustion system (2), if the starting condition of the combustion system (2) is met, the combustion system (2) starts combustion, hot water realizes circulation in a loop, and the water temperature T detected by the water outlet temperature sensor (15) is used for detecting the water temperature T2Adjusting the thermal load of the combustion system (2) such that T2Equal to zero cold water required temperature TZeroThe constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance; if the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the zero cold water mode of the gas water heater cannot work normally, and troubleshooting or repair is needed.
10. The working method of the gas water heater capable of heating is characterized by comprising the following steps:
s41, the gas water heater is powered on to be in a standby state, a heating mode is selected through a controller on the shell, the controller controls a passage which is arranged on the two-position three-way valve (8) and connected with a water outlet of the heat exchange system (1) and one end of the heating branch (7) to be opened, and the water utilization equipment (22) is not opened;
s42, starting a water pump (11), starting a heating function, starting the water pump (11), namely a water flow sensor (12), a heat exchange system (1), a water outlet temperature sensor (15), a two-position three-way valve (8), a heating device (9), a first one-way valve (10), a heating return water temperature sensor (20) and the water pump (11) to form a circulation loop, wherein the water pump (11) drives water flow in the circulation loop to circularly flow;
s43, the controller measures the heating backwater temperature T according to the heating backwater temperature sensor (20) and the water flow sensor (12)5And heating return water flow Q5The data of (2) is judged whether to accord with the starting condition of the combustion system (2), if the starting condition of the combustion system (2) is met, the combustion system (2) starts combustion, hot water realizes circulation in a loop, and the water temperature T detected by the water outlet temperature sensor (15) is used for detecting the water temperature T2Adjusting the thermal load of the combustion system (2) such that T2Equal to the temperature T required for heatingHeating deviceThe constant temperature state of the hot water is maintained, and the continuous heating of the heating equipment (9) is realized; if the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the heating mode of the gas water heater cannot work normally, and troubleshooting or repair is needed;
s44, after the temperature of the bathroom is raised to a certain value by the heating equipment (9), the heating mode is switched to a bathroom mode or a zero-cold-water mode through the controller on the shell, if the heating mode is switched to the bathroom mode, the step S45 is carried out, and if the heating mode is switched to the zero-cold-water mode, the step S50 is carried out;
s45, setting the temperature T of water for the bathroom0The controller controls a passage on the two-position three-way valve (8) for connecting the water outlet and the water outlet end (4) of the heat exchange system (1) to be opened, and controls a passage on the two-position three-way valve (8) for connecting the water outlet of the heat exchange system (1) and one end of the heating branch (7) to be closed;
s46, starting a water using device (22) connected to the water outlet end (4), enabling tap water to flow into the gas water heater through the water inlet end (3), enter the heat exchange system (1) after passing through the water inlet temperature sensor (19), the water pump (11) and the water flow sensor (12), not starting the water pump (11) at the moment, and enabling the controller to measure the water inlet temperature T according to the water inlet temperature sensor (19) and the water flow sensor (12)1And the inflow Q1Judging whether the data meet the starting condition of the combustion system (2);
s47, when the water inlet temperature T is higher1Water flow rate Q1All in line with the start-up of the combustion system (2)When the conditions are met, the combustion system (2) continues to keep burning, and at the moment, water flows into the heat exchange system (1) and exchanges heat with high-temperature flue gas generated by the combustion of the combustion system (2) to become hot water; then the hot water and the heating hot water remained in the upstream pipelines of the heat exchange system (1) and the two-position three-way valve (8) in the heating mode sequentially flow out from the water outlet of the heat exchange system (1) to the water outlet temperature sensor (15) and then flow through the two-position three-way valve (8) to reach the water mixing device (14), and the controller judges the water temperature T measured by the water outlet temperature sensor (15)2Whether the temperature T is equal to the set water temperature T for the bathroom0Matching; when the temperature of the inlet water is T1Water flow rate Q1When the condition that the combustion system is started is not met, the combustion system does not start combustion, the gas water heater cannot be normally used, and troubleshooting or repair may be needed;
s48, if the water temperature T measured by the water outlet temperature sensor (15)2The temperature T of the water for bathroom set in the step S450If the difference is positive, the thermal load of the combustion system (2) is maintained, and the water mixing device (14) is not communicated with the water mixing branch (13); if the water temperature measured by the water outlet temperature sensor (15) is too high, the heat load of the combustion system (2) is reduced, and meanwhile, the water mixing device (14) is communicated with the water mixing branch (13); if the water temperature measured by the water outlet temperature sensor (15) is lower, the heat load of the combustion system (2) is increased, and meanwhile, the water mixing device (14) is kept to be communicated with the water mixing branch (13); ensuring the temperature of the water flow flowing out of the water outlet of the heat exchange system (1) and the temperature T of the bathroom water set in the step S450Matching;
s49, the hot water continuously flows through the bathroom water temperature sensor (16) and the water outlet end (4) and finally reaches the water utilization equipment (22) for users to use;
s50, the controller controls a passage on the two-position three-way valve (8) for connecting the water outlet and the water outlet end (4) of the heat exchange system (1) to be opened, and controls a passage on the two-position three-way valve (8) for connecting the water outlet of the heat exchange system (1) and one end of the heating branch (7) to be closed;
s51, a water pump (11), namely a water flow sensor (12), a heat exchange system (1), a water outlet temperature sensor (15), a two-position three-way valve (8), a water mixing device (14), a bathroom water temperature sensor (16), a second one-way valve (18), a bathroom return water temperature sensor (21) and the water pump (11) form a circulation loop, and the water pump (11) drives water flow in the circulation loop to circularly flow;
s52, the controller measures the bathroom backwater temperature T according to the bathroom backwater temperature sensor (21) and the water flow sensor (12)4And bathroom backwater flow Q4Whether the starting condition of the combustion system (2) is met or not is judged, and if the starting condition of the combustion system (2) is met, the water temperature T detected by the water temperature sensor (15) is judged2Whether the temperature T is equal to the required temperature T of zero cold waterZeroIf T is matched2≤TZeroThen the flow proceeds to step S53, if T is reached2＞TZeroThen, go to step S54; if the starting condition of the combustion system is not met, the combustion system does not start combustion until the starting condition of the combustion system is met; if the starting condition of the combustion system is not met, the zero cold water mode of the gas water heater cannot work normally, and troubleshooting or repair is needed;
s53, the combustion system (2) continues to burn, hot water is circulated in a loop, and the water temperature T detected by the water outlet temperature sensor (15) is used2Adjusting the thermal load of the combustion system (2) such that T2Equal to zero cold water required temperature TZeroThe constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance;
s54, stopping combustion of the combustion system (2), circulating hot water in a loop, and cooling the water to T2≤TZeroWhen the water temperature T detected by the water outlet temperature sensor (15) is higher than the set temperature T, the combustion system (2) restarts combustion2Adjusting the thermal load of the combustion system (2) such that T2Equal to zero cold water required temperature TZeroAnd the constant temperature state of hot water is maintained, and the preheating of the continuous bathroom is realized in advance.
CN202010361485.2A 2020-04-30 2020-04-30 Gas water heater capable of heating and working method thereof Pending CN111412649A (en)

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CN114811947A (en) * 2022-04-08 2022-07-29 广东万和新电气股份有限公司 Control method of gas water heater and gas water heater
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