CN113686012A - Temperature control method of gas water heater and gas water heater system applying same - Google Patents
Temperature control method of gas water heater and gas water heater system applying same Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 386
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000017525 heat dissipation Effects 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims description 25
- 238000012546 transfer Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 2
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- 238000003287 bathing Methods 0.000 description 1
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—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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- Control Of Combustion (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention relates to a temperature control method of a gas water heater, which comprises the following steps: the method comprises the following steps of operating a water heater, enabling water to enter the water heater, enabling the water to flow out of the water heater after being heated by the water heater, conveying the water to a water using end, monitoring the water inlet temperature, the water outlet temperature and the water flow of the water heater by the water heater, measuring the actual water using temperature of the water using end, calculating heat loss according to the temperature difference between the water outlet temperature and the actual water using temperature, and calculating the length of a water pipe of the water heater by combining the heat dissipation loss of the unit pipe length of the water pipe; calculating the compensation heat loss of the temperature of water in the water heater between water inlet and water outlet according to the real-time water outlet temperature, the real-time water inlet temperature, the real-time water flow, the real-time unit pipe length heat dissipation loss and the pipe length; temperature control: and (6) adjusting load according to the compensation heat loss in the step S2, and controlling and adjusting the gas flow of the gas valve and the rotating speed of the fan to enable the heat provided by the water heater to be equal to the compensation heat loss. The water heater can accurately control the actual outlet water temperature according to the set temperature.
Description
Technical Field
The invention belongs to the field of temperature control of water heaters, and particularly relates to a temperature control method of a gas water heater and a gas water heater system using the same.
Background
The gas water heater is a water heater commonly used at present. The working principle is that the gas combustion heat value is utilized to heat water, and then the hot water is led out from the hot water pipe. Because the actual user's house environment is different, and the distance of final hot water delivery port apart from gas heater is different, and the actual leaving water temperature often differs great with the temperature that the user needs, and the actual leaving water temperature of delivery port also can't accurate control to the actual leaving water temperature of gas heater accurate measurement delivery port. When the hot water pipe for conveying hot water is too long, the energy loss is more, and the actual outlet water temperature is far lower than the set temperature. Especially when ambient temperature is lower, user's shower demand can not be satisfied, needs adjust out water temperature repeatedly, and complex operation just easily causes the energy extravagant.
Disclosure of Invention
The invention aims to provide a temperature control method of a gas water heater and a gas water heater system using the same, so that the water heater can accurately control the actual outlet water temperature according to the set temperature.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a method of temperature control for a gas water heater, comprising:
debugging: the method comprises the following steps of operating a water heater, enabling water to enter the water heater, enabling the water to flow out of the water heater after being heated by the water heater, conveying the water to a water using end, monitoring the water inlet temperature, the water outlet temperature and the water flow of the water heater by the water heater, measuring the actual water using temperature of the water using end, calculating heat loss according to the temperature difference between the water outlet temperature and the actual water using temperature, and calculating the length of a water pipe of the water heater by combining the heat dissipation loss of the unit pipe length of the water pipe;
and a compensation calculation step:
s1: inputting a preset outlet water temperature into the water heater, operating the water heater according to a certain load, and measuring the inlet water temperature, the outlet water temperature and the water flow rate in real time during operation by the water heater;
s2: calculating the compensation heat loss of the temperature of water in the water heater between water inlet and water outlet according to the real-time water outlet temperature, the real-time water inlet temperature, the real-time water flow, the real-time heat dissipation loss of the unit pipe length and the length of the water pipe;
temperature control: and adjusting the load according to the compensation heat loss in the step S2, and controlling and adjusting the gas flow of a gas valve and the rotating speed of a fan to enable the heat provided by the water heater to be equal to the compensation heat loss.
In the use process of the water heater, heat loss can be caused in the processes of transferring heat from water to the inner wall of the water pipe, transferring heat from the inner wall of the water pipe to the outer wall of the water pipe and the like, so that the actual outlet water temperature of the water heater is deviated from the set outlet water temperature, and the deviation is lower than the set outlet water temperature. The temperature control method provided by the invention can accurately control the actual water temperature according to the set temperature by calculating the real-time heat loss of the water heater and regulating and controlling the air intake and the gas volume of the burner for compensation, so that the water temperature at the water using end is kept consistent with the input preset water temperature, and the water heater can reach the constant temperature in the true sense; the phenomenon that the temperature of the outlet water does not meet the bathing requirement and is repeatedly adjusted due to weather change can be avoided; the water heater is constantly under the most appropriate load, and the energy utilization rate is high.
Preferably, the heat dissipation loss of the unit pipe length is calculated according to a pipe heat dissipation coefficient of a water pipe and an estimated water temperature difference, wherein the pipe heat dissipation coefficient comprises an in-pipe convection heat transfer coefficient, a pipe wall heat transfer coefficient and an out-pipe convection heat transfer coefficient; and in the debugging step, the heat loss is calculated according to the specific heat capacity of water, the water flow, the temperature difference between the outlet water temperature and the actual water temperature. The actual length of the water pipe can be calculated through the calculation method during initial operation, so that accurate calculation of heat loss in use is facilitated.
In particular, in the step of commissioning, the temperature T of the water inlet of the water heater0Water flow M and water outlet temperature T1And the actual water temperature T2Calculating the heat loss Q1，Q1＝CM(T2-T1) Wherein C is the specific heat capacity of water, and the length L of the water pipe is calculated as Q according to the heat dissipation loss Q of the unit pipe length of the water pipe1And/q, wherein the unit tube length heat dissipation loss q is according to the heat resistance R of convection heat transfer in the tube1Thermal conduction resistance R of pipe wall2Thermal resistance R of heat convection outside pipe3，
To calculate r1Is the radius of the inner wall of the water pipe, r2Is the radius of the outer wall of the water pipe, lambda1Is the coefficient of heat conductivity of the water pipe, alpha1And alpha2α1And alpha2The heat release coefficient between water and the inner wall of the water pipe and the heat release coefficient between the outer wall of the water pipe and air are respectively; in the compensation calculation step, the real-time outlet water temperature T1', real-time inlet water temperature T0', water flow M', the load of the water heater is Q at this time0'; the calculation method of the heat dissipation loss q' of the unit tube length is as follows:
said compensating heat loss Q1'Q' × L, and the adjusted load is Q0’+q’×L。
Preferably, the estimated water temperature difference in the debugging step is an average value of a temperature difference between the inlet water temperature and the actual water temperature in the debugging step and a temperature difference between the inlet water temperature and the outlet water temperature. Alternatively, the estimated water temperature difference in the compensation calculation step is a temperature difference between the intake water temperature and the outlet water temperature in real time in the step S1. At this time, the temperature of the incoming water is identical to the temperature of the environment, and thus can be used to estimate the temperature difference in the water pipe.
Preferably, the method further comprises judgingStep S11: when the inlet water temperature T in the compensation calculation step0' less than first threshold TxIf so, step S2 is executed, otherwise, the temperature control method is ended. Since the compensation calculation method described above is affected by the ambient temperature (i.e., the intake water temperature), the temperature control method is not activated to reduce the error when the first threshold value is not satisfied.
Preferably, the method further comprises a judging step S12: when the preset outlet water temperature input in the compensation calculation step is less than a second threshold value TmaxIf so, step S2 is executed, otherwise, the temperature control method is ended. Since the compensation calculation method described above is affected by the ambient temperature (i.e., the intake water temperature), the temperature control method is not activated to reduce the error when the second threshold value is not satisfied.
Preferably, after the step of S1 is executed, the method further includes a step of S13: when the certain load in the step S1 is the maximum load QmaxWhen the temperature control method is finished, the temperature control method is ended; when the certain load is larger than the maximum load Q in the step S1maxThen, step S20 is executed: adjusting the load at actual operation to Qmax(ii) a Otherwise, the step S2 is executed. The load can be adjusted according to the load condition in actual operation, the overload condition is avoided, and the safe operation of the water heater is protected.
Preferably, still include combustor, heat exchanger, controller, the temperature sensor of intaking, play water temperature sensor, water flow sensor, fan and proportional valve, wherein:
the heat exchanger is used for exchanging heat of combustion of the burner with water in the water pipe and heating the water in the water pipe;
the water inlet temperature sensor and the water flow sensor are used for detecting the water inlet temperature and the water flow of water in the water pipe; the water outlet temperature sensor is used for monitoring the water outlet temperature;
the fan and the proportional valve are used for controlling the air quantity of the burner, and the proportional valve is used for controlling the gas quantity of the burner;
the controller is used for receiving a preset water outlet temperature and controlling the load, and calculating the air quantity of the fan and the opening degree of the proportional valve according to the measurement of the water inlet temperature sensor, the water outlet temperature sensor and the water flow sensor so as to adjust the heat quantity of the combustor and adjust the load. The method is realized by the electronic equipment, so that the measured data are more accurate, and the electronic equipment is convenient to install and assemble.
Preferably, the water heater further comprises a display, the display is electrically connected with the controller, and the display is used for inputting the preset outlet water temperature and transmitting the input preset outlet water temperature to the controller. The display can be used for inputting and displaying the parameters, and is more convenient to use.
A gas water heater system for realizing the temperature control method comprises an input device, a burner, a heat exchanger, a controller, a water inlet temperature sensor, a water outlet temperature sensor, a water flow sensor, a fan and a proportional valve, wherein:
the combustor is connected with the fan and the proportional valve respectively; the burner heats water through the heat exchanger;
the water outlet pipe of the heat exchanger is provided with the water outlet temperature sensor, and the water inlet pipe of the heat exchanger is provided with the water inlet temperature sensor and the water flow sensor;
the input device is used for inputting the preset outlet water temperature;
the controller is electrically connected with the proportional valve, the fan, the water inlet temperature sensor, the water outlet temperature sensor, the water flow sensor and the input device respectively.
Preferably, the input device is a display, and the display is used for displaying and inputting the preset outlet water temperature and displaying the actual outlet water temperature.
Drawings
FIG. 1 is a schematic flow chart of a temperature control method according to embodiment 1;
fig. 2 is a schematic structural diagram of a gas water heater system of embodiment 2.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
Example 1
A temperature control method of a gas water heater comprises the following steps:
110. debugging: the water heater is operated, water enters the water heater, flows out of the water heater after being heated by the water heater and is conveyed to a water using end, the water heater monitors the water inlet temperature, the water outlet temperature and the water flow of the water heater, and the water heater monitors the water inlet temperature T of the water heater after the water outlet temperature is stable0Water outlet temperature T1Measuring the actual water temperature T of the water end of the water heater at the water outlet of the water heater by using a water temperature meter2Calculating the heat loss Q1And calculating the length of the water pipe according to the unit pipe length heat dissipation loss q of the water pipe
Wherein the unit tube length heat dissipation loss q is determined as the heat resistance R of convection heat transfer in the tube1Heat conduction resistance R of pipe wall2Is the thermal resistance R of heat convection outside the tube3，
Wherein the content of the first and second substances,
r1is the inner wall radius (unit mm) of the PPR pipe, r2Is the radius (unit mm) of the outer wall of the PPR pipe, lambda1The unit of the heat conduction coefficient of the PPR pipe is W/(m)2·℃)，α1Is the heat release coefficient, alpha, between water and the inner wall of the water pipe2The heat release coefficient between the outer wall of the water pipe and the air is W/(m)2C.g. to be prepared into a preparation. The actual length of the water pipe can be calculated through the calculation method during initial operation, so that accurate calculation of heat loss in use is facilitated.
And a compensation calculation step:
120. s1: inputting preset water outlet temperature to the water heater and pressing oneWater heater running at fixed load, and water inlet temperature T in real time during measurement and running of water heater0' water outlet temperature T1', water flow rate M';
160. s2: according to the real-time outlet water temperature T1', real-time inlet water temperature T0', real-time water flow M ', real-time heat dissipation loss Q ' per unit pipe length and length L of the water pipe calculate the compensation heat loss Q between water inlet and water outlet of the temperature of water in the water heater1'; at the moment, the actual load of the water heater during actual operation is Q0’；
170. Temperature control: adjusting the actual load to Q0’+Q1', controlling the gas flow of the gas valve and the fan speed according to the compensated heat loss Q1', accurately controlling the actual outlet water temperature T2’。
The calculation method of the unit tube length heat dissipation loss q' in the compensation calculation step is as follows:
said heat loss Q in said debugging step1＝CM(T2-T1) Wherein C is the specific heat capacity of water.
In the temperature control step, the actual load is adjusted to Q0’+Q1', i.e. Q0’+q’×L。
Further comprising 130, judging step S11: when the inlet water temperature T in the compensation calculation step0' less than first threshold TxIf so, step S2 is executed, otherwise, the temperature control method is ended. Since the compensation calculation method described above is affected by the ambient temperature (i.e., the intake water temperature), the temperature control method is not activated to reduce the error when the first threshold value is not satisfied.
Further comprising the steps of judging 140, S12: when the preset outlet water temperature input in the compensation calculation step is less than a second threshold value TmaxIf so, step S2 is executed, otherwise, the temperature control method is ended. Since the compensation calculation method described above is affected by the ambient temperature (i.e., the temperature of the intake water), the second threshold value is not satisfiedThe temperature control method is not activated to reduce errors.
The first threshold value is 30 ℃, the second threshold value is 50 ℃,
further comprising 150, judging step S13: load Q when actually running1' is the maximum load QmaxWhen the temperature control 1 method is finished; load Q when actually running1' greater than maximum load QmaxThen, step S20 is executed: load Q at actual operation1' adjustment to Qmax(ii) a Otherwise, the step S2 is executed to adjust the load according to the load condition during actual operation, so as to avoid the overload condition and protect the safe operation of the water heater.
Still include combustor, heat exchanger, controller, the temperature sensor of intaking, play water temperature sensor, water flow sensor, fan and proportional valve, wherein:
the heat exchanger is used for exchanging heat of combustion of the burner with water in the water pipe and heating the water in the water pipe;
the water inlet temperature sensor and the water flow sensor are used for detecting the water inlet temperature and the water flow of water in the water pipe; the water outlet temperature sensor is used for monitoring the water outlet temperature;
the fan and the proportional valve are used for controlling the air quantity of the burner, and the proportional valve is used for controlling the gas quantity of the burner;
the controller is used for receiving a preset water outlet temperature and controlling the load, and calculating the air quantity of the fan and the opening degree of the proportional valve according to the measurement of the water inlet temperature sensor, the water outlet temperature sensor and the water flow sensor so as to adjust the heat quantity of the combustor and adjust the load. The method is realized by the electronic equipment, so that the measured data are more accurate, and the electronic equipment is convenient to install and assemble.
The display is electrically connected with the controller and used for displaying and inputting the preset outlet water temperature and transmitting the input preset outlet water temperature to the controller. The display can be used for inputting and displaying the parameters, and is more convenient to use.
When using the water heater for the first time, record the actual outlet water temperature of terminal hot water department, input this temperature parameter on the display, the controller can be according to the temperature of intaking this moment, outlet water temperature and discharge, calculate roughly water pipe length, when the next time user uses the water heater, the controller can be according to real-time discharge, the temperature of intaking, the load that needs the compensation is calculated to the outlet water temperature, then the control signal of converting into proportional valve and fan, accurate control gas flow and fan rotational speed, realize setting for temperature and terminal hot water temperature matching, reach intelligent accuse temperature in the true sense, fully adapt to the user's shower demand under different ambient temperature and water pressure, promote user experience.
Example 2
Referring to fig. 1, the gas water heater system for implementing the temperature control method of embodiment 1 includes a display 4, a burner 6, a heat exchanger 7, a controller 3, an inlet water temperature sensor 1, an outlet water temperature sensor 2, a water flow sensor 9, a fan 8 and a proportional valve 5, wherein:
the combustor 6 is respectively connected with the fan 8 and the proportional valve 5; the burner 6 heats the water through the heat exchanger 7;
the outlet water temperature sensor 2 is arranged on the outlet pipe of the heat exchanger 7, and the inlet water temperature sensor 1 and the water flow sensor 9 are arranged on the inlet pipe of the heat exchanger 7;
the controller 3 is electrically connected with the proportional valve 5, the fan 8, the water inlet temperature sensor 1, the water outlet temperature sensor 2, the water flow sensor 9 and the input device respectively.
The display 4 is used for displaying and inputting the preset outlet water temperature and displaying the actual outlet water temperature.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A temperature control method of a gas water heater is characterized by comprising the following steps:
debugging: the method comprises the following steps of operating a water heater, enabling water to enter the water heater, enabling the water to flow out of the water heater after being heated by the water heater, conveying the water to a water using end, monitoring the water inlet temperature, the water outlet temperature and the water flow of the water heater by the water heater, measuring the actual water using temperature of the water using end, calculating heat loss according to the temperature difference between the water outlet temperature and the actual water using temperature, and calculating the length of a water pipe of the water heater by combining the heat dissipation loss of the unit pipe length of the water pipe;
and a compensation calculation step:
s1: inputting a preset outlet water temperature into the water heater, operating the water heater according to a certain load, and measuring the inlet water temperature, the outlet water temperature and the water flow rate in real time during operation by the water heater;
s2: calculating the compensation heat loss of the temperature of water in the water heater between water inlet and water outlet according to the real-time water outlet temperature, the real-time water inlet temperature, the real-time water flow, the real-time heat dissipation loss of the unit pipe length and the length of the water pipe;
temperature control: and adjusting the load according to the compensation heat loss in the step S2, and controlling and adjusting the gas flow of a gas valve and the rotating speed of a fan to enable the heat provided by the water heater to be equal to the compensation heat loss.
2. The temperature control method according to claim 1, wherein the unit pipe length heat loss is calculated from a pipe heat dissipation coefficient of a water pipe and an estimated water temperature difference, the pipe heat dissipation coefficient including an in-pipe convective heat transfer coefficient, a pipe wall heat transfer coefficient, and an out-of-pipe convective heat transfer coefficient; and in the debugging step, the heat loss is calculated according to the specific heat capacity of water, the water flow, the temperature difference between the outlet water temperature and the actual water temperature.
3. The temperature control method according to claim 2, wherein the estimated water temperature difference in the commissioning step is an average of a temperature difference between the incoming water temperature and the actual water temperature in the commissioning step and a temperature difference between the incoming water temperature and the outgoing water temperature.
4. The temperature control method according to claim 2, wherein the estimated water temperature difference in the compensation calculation step is a temperature difference between the inlet water temperature and the outlet water temperature in real time in the step S1.
5. The temperature control method according to claim 1, further comprising a judgment step S11: when the inlet water temperature in the compensation calculation step is less than the first threshold value TxIf so, executing step S2, otherwise, ending the temperature control method;
and/or further comprising a decision step S12: when the preset outlet water temperature input in the compensation calculation step is less than a second threshold value TmaxIf so, step S2 is executed, otherwise, the temperature control method is ended.
6. Temperature control method according to claim 1, characterized in that in the commissioning step the inlet water temperature T of the water heater0Water flow M and water outlet temperature T1And the actual water temperature T2Calculating the heat loss Q1，Q1＝CM(T2-T1) Wherein C is the specific heat capacity of water, and the length L of the water pipe is calculated as Q according to the heat dissipation loss Q of the unit pipe length of the water pipe1And/q, wherein the unit tube length heat dissipation loss q is according to the heat resistance R of convection heat transfer in the tube1Thermal conduction resistance R of pipe wall2Thermal resistance R of heat convection outside pipe3，
To calculate r1Is the radius of the inner wall of the water pipe, r2Is the radius of the outer wall of the water pipe, lambda1Is the coefficient of heat conductivity of the water pipe, alpha1And alpha2Respectively the heat release coefficient between the water and the inner wall of the water pipe and the heat release system between the outer wall of the water pipe and the airCounting; in the compensation calculation step, the real-time outlet water temperature T1', real-time inlet water temperature T0', water flow M', the load of the water heater is Q at this time0'; the calculation method of the heat dissipation loss q' of the unit tube length is as follows:
said compensating heat loss Q1'Q' × L, and the adjusted load is Q0’+q’×L。
7. The temperature control method according to claim 1, further comprising a judging step S13, after the step S1 is executed: when the certain load in the step S1 is the maximum load QmaxWhen the temperature control method is finished, the temperature control method is ended; when the certain load is larger than the maximum load Q in the step S1maxThen, step S20 is executed: adjusting the load at actual operation to Qmax(ii) a Otherwise, the step S2 is executed.
8. The temperature control method of any one of claims 1-7, further comprising a burner, a heat exchanger, a controller, an inlet water temperature sensor, an outlet water temperature sensor, a water flow sensor, a fan, and a proportional valve, wherein:
the heat exchanger is used for exchanging heat of combustion of the burner with water in the water pipe and heating the water in the water pipe;
the water inlet temperature sensor and the water flow sensor are used for detecting the water inlet temperature and the water flow of water in the water pipe; the water outlet temperature sensor is used for monitoring the water outlet temperature;
the fan and the proportional valve are used for controlling the air quantity of the burner, and the proportional valve is used for controlling the gas quantity of the burner;
the controller is used for receiving a preset water outlet temperature and controlling the load, and calculating the air quantity of the fan and the opening degree of the proportional valve according to the measurement of the water inlet temperature sensor, the water outlet temperature sensor and the water flow sensor so as to adjust the heat quantity of the combustor and adjust the load.
9. The temperature control method according to claim 8, further comprising a display electrically connected to the controller, the display being configured to display and input a preset outlet water temperature and to transmit the input preset outlet water temperature to the controller.
10. A gas water heater system for implementing the temperature control method of any one of claims 1-9, comprising an input device, a burner, a heat exchanger, a controller, an inlet water temperature sensor, an outlet water temperature sensor, a water flow sensor, a fan, and a proportional valve, wherein:
the combustor is connected with the fan and the proportional valve respectively; the burner heats water through the heat exchanger;
the water outlet pipe of the heat exchanger is provided with the water outlet temperature sensor, and the water inlet pipe of the heat exchanger is provided with the water inlet temperature sensor and the water flow sensor;
the input device is used for inputting the preset outlet water temperature;
the controller is electrically connected with the proportional valve, the fan, the water inlet temperature sensor, the water outlet temperature sensor, the water flow sensor and the input device respectively.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114383321A (en) * | 2021-12-30 | 2022-04-22 | 江苏恒信诺金科技股份有限公司 | Energy-saving control system and control method for outlet water temperature of directly-heated heat pump water heater |
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