CN113154692A - Constant temperature control method and device - Google Patents

Constant temperature control method and device Download PDF

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Publication number
CN113154692A
CN113154692A CN202110573466.0A CN202110573466A CN113154692A CN 113154692 A CN113154692 A CN 113154692A CN 202110573466 A CN202110573466 A CN 202110573466A CN 113154692 A CN113154692 A CN 113154692A
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water
water flow
target
temperature
flow
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张俊新
郑来松
潘叶江
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Vatti Co Ltd
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Vatti Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices
    • F24H9/2007Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035Arrangement or mounting of control or safety devices for water heaters using fluid fuel

Abstract

The application relates to a constant temperature control method and device. The method is applied to a gas water heater, a water inlet pipe and a water outlet pipe of the gas water heater are communicated through a pipeline, a water regulating valve is arranged on the pipeline, and the method comprises the following steps: acquiring the current water flow of cold water flowing in through a water inlet pipe; if the difference value between the reference water flow and the current water flow is larger than or equal to a preset first water flow threshold value, acquiring the inlet water temperature of cold water, the outlet water temperature of hot water flowing out through a water outlet pipe and a target water temperature; determining the target water flow of cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow; and controlling the opening of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline. Adopt this application can make out the water temperature keep at the target temperature when the discharge of the cold water that the inlet tube flowed into reduces, improve user's experience.

Description

Constant temperature control method and device
Technical Field
The application relates to the field of gas water heaters, in particular to a constant temperature control method and device.
Background
At present, water heaters on the market are diversified in types, wherein the gas water heater can output hot water instantly, so that better user experience is obtained, and the gas water heater is widely used by users. The gas water heater conveys cold water to the heat exchanger through the water inlet pipe, controls firepower by adjusting air inflow so as to heat the cold water in the heat exchanger to a target water temperature, and conveys hot water to a user for use through the water outlet pipe.
When a user uses hot water, when the water quantity of cold water flowing into the heat exchanger is reduced, the gas water heater reduces the air inflow to adjust the firepower to ensure that the water temperature of the heated hot water still keeps the target water temperature. However, the reserved heat still exists in the heat exchanger, so that the water temperature adjustment has hysteresis, the water temperature of the heated hot water is higher than the target water temperature, and the user experience is affected. Therefore, a method for controlling the constant temperature of a gas water heater is needed.
Disclosure of Invention
In view of the above, it is necessary to provide a thermostatic control method and apparatus.
In a first aspect, a method for controlling a constant temperature is provided, and the method is applied to a gas water heater, wherein a water inlet pipe and a water outlet pipe of the gas water heater are communicated through a pipeline, a water regulating valve is arranged on the pipeline, and the method comprises the following steps:
acquiring the current water flow of cold water flowing in through a water inlet pipe;
if the difference value between the reference water flow and the current water flow is larger than or equal to a preset first water flow threshold value, acquiring the inlet water temperature of cold water, the outlet water temperature of hot water flowing out through a water outlet pipe and a target water temperature;
determining the target water flow of cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow;
and controlling the opening of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline.
As an alternative embodiment, according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow, the calculation formula for determining the target water flow of the cold water flowing from the inlet pipe into the outlet pipe through the pipeline is as follows:
Figure BDA0003083512170000021
where M represents the target water flow rate, GH represents the outlet water temperature, TH represents the target water temperature, NW represents the current water flow rate, and CH represents the inlet water temperature.
As an alternative embodiment, before obtaining the current water flow rate of the cold water flowing in through the water inlet pipe, the method further comprises:
and determining the average water flow of cold water flowing in through the water inlet pipe within a preset time length, and determining the average water flow as a reference water flow.
As an optional implementation, the method further comprises:
and if the current water flow is restored to the reference water flow, the gas water heater closes the water regulating valve.
As an optional embodiment, before controlling the opening degree of the water regulating valve according to the target water flow, the method further includes:
and if the target water flow is greater than or equal to a preset second water flow threshold value, determining the second water flow threshold value as the target water flow.
In a second aspect, a thermostatic control device is provided, the thermostatic control device is applied to a gas water heater, a water inlet pipe and a water outlet pipe of the gas water heater are communicated through a pipeline, a water regulating valve is arranged on the pipeline, and the thermostatic control device comprises:
the first acquisition module is used for acquiring the current water flow of cold water flowing in through the water inlet pipe;
the second acquisition module is used for acquiring the inlet water temperature of cold water, the outlet water temperature of hot water flowing out through the water outlet pipe and the target water temperature if the difference value between the reference water flow and the current water flow is greater than or equal to a preset first water flow threshold value;
the first determining module is used for determining the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow;
and the first control module is used for controlling the opening of the water regulating valve according to the target water flow so as to enable the cold water with the target water flow to flow into the water outlet pipe from the water inlet pipe through the pipeline.
As an optional implementation, the apparatus further comprises:
and the second determining module is used for determining the average water flow of the cold water flowing in through the water inlet pipe within a preset time length and determining the average water flow as the reference water flow.
As an optional implementation, the apparatus further comprises:
and the second control module is used for controlling the water regulating valve to be closed if the current water flow is restored to the reference water flow.
As an optional implementation, the apparatus further comprises:
and the third determining module is used for determining the second water flow threshold value as the target water flow if the target water flow is greater than or equal to the preset second water flow threshold value.
In a third aspect, a computer device is provided, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor to, when executed, perform the method steps of the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, having stored thereon a computer program which, when being executed by a processor, carries out the method steps of the first aspect.
The embodiment of the application provides a constant temperature control method and a constant temperature control device, the method is applied to a gas water heater, a water inlet pipe and a water outlet pipe of the gas water heater are communicated through a pipeline, a water regulating valve is arranged on the pipeline, and the method comprises the following steps: firstly, the gas water heater acquires the current water flow of cold water flowing in through the water inlet pipe, and if the difference value between the reference water flow and the current water flow is larger than or equal to a preset first water flow threshold value, the gas water heater acquires the inlet water temperature of the cold water, the outlet water temperature of hot water flowing out through the water outlet pipe and the target water temperature. Then, the gas water heater determines the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow, and controls the opening of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline. Like this, when the discharge of the cold water that the inlet tube flowed in reduced, when the temperature that leads to the hot water that the outlet pipe flows out was higher than the target temperature, the cold water with the target discharge in the inlet tube passes through the pipeline and flows into the outlet pipe to make the play water temperature keep at the target temperature, thereby improve user's experience.
Drawings
Fig. 1 is a schematic structural diagram of a gas water heater provided in an embodiment of the present application;
fig. 2 is a flowchart of a thermostatic control method according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a thermostat control device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, an embodiment of the present application provides a thermostatic control method, which may be applied to a gas water heater. The gas water heater includes a water inlet pipe 110, a water regulating valve 120, a pipe 130, a water outlet pipe 140 and a heat exchanger 150. Wherein the pipe 130 communicates the water inlet pipe 110 and the water outlet pipe 140. The water adjustment valve 120 is provided on the pipe 130. The inlet pipe 110 is used to transport cold water. The damper valve 120 is used to control the flow of cold water from the inlet pipe 110 through the pipe 130 to the outlet pipe 140. The water outlet pipe 140 is used for delivering hot water to a user for use; the heat exchanger 150 is used to heat cold water.
A detailed description will be given below of a thermostatic control method provided in an embodiment of the present application with reference to a specific embodiment, as shown in fig. 2, the specific steps are as follows:
step 201, obtaining the current water flow of cold water flowing in through a water inlet pipe.
In practice, the gas water heater needs to deliver cold water into the gas water heater through the water inlet pipe before heating the cold water. In the process, the gas water heater can acquire the current water flow of cold water flowing in through the water inlet pipe in real time.
Step 202, if the difference between the reference water flow and the current water flow is greater than or equal to a preset first water flow threshold, acquiring the inlet water temperature of cold water, the outlet water temperature of hot water flowing out through the outlet pipe, and a target water temperature.
In implementation, after the gas water heater obtains the current water flow, a difference value between the reference water flow and the current water flow is calculated, and whether the difference value is greater than or equal to a preset first water flow threshold value is judged. And if the difference value between the reference water flow and the current water flow is greater than or equal to a preset first water flow threshold value, indicating that the water flow of the cold water flowing in from the water inlet pipe has water flow fluctuation. Correspondingly, the gas water heater can further obtain the inlet water temperature of cold water, the outlet water temperature of hot water flowing out through the outlet pipe and the target water temperature. The first water flow threshold and the target water temperature can be set by technicians according to experience or actual conditions, and can also be determined by the gas water heater when the water flow of cold water does not fluctuate; the inlet water temperature and the outlet water temperature can be obtained through actual measurement in the process of using the water heater. The reference water flow rate indicates the flow rate of cold water corresponding to each unit time when there is no water flow fluctuation.
And if the difference value between the reference water flow and the current water flow is smaller than a preset first water flow threshold value, the fact that the water flow of the cold water flowing from the water inlet pipe does not fluctuate is indicated. Correspondingly, the gas water heater does not need to be processed.
As an alternative embodiment, the processing procedure of determining the reference water flow rate of the gas water heater is as follows: and within a preset time length, the gas water heater determines the average water flow of cold water flowing in through the water inlet pipe and determines the average water flow as a reference water flow.
In practice, the preset time period may be set by a technician according to experience or actual conditions. When the water flow of the cold water does not fluctuate, the gas water heater may obtain the water flow of the cold water corresponding to each unit time within a preset time period (for example, 5 seconds to 6 seconds), calculate an average water flow of the cold water within the preset time period, and use the average water flow as a reference water flow.
And 203, determining the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow.
In implementation, after the gas water heater obtains the water inlet temperature, the water outlet temperature, the target water temperature and the current water flow, the target water flow of cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline can be determined. Optionally, the gas water heater determines a calculation formula of the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow as follows:
Figure BDA0003083512170000061
where M represents the target water flow rate, GH represents the outlet water temperature, TH represents the target water temperature, NW represents the current water flow rate, and CH represents the inlet water temperature.
For example: the water outlet temperature of the gas water heater is 67 ℃, the water inlet temperature is 20 ℃, the target water temperature is 60 ℃, the current water flow is 6L, and the target water flow M is (67-20)/((67-60) × 6) ═ 0.9, namely the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline is 0.9L.
And 204, controlling the opening of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline.
In implementation, after the gas water heater obtains the target water flow, the opening of the water regulating valve can be controlled, and cold water of the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline. Like this, when the discharge of the cold water that the inlet tube flowed in reduced, when the temperature that leads to the hot water that the outlet pipe flows out was higher than the target temperature, the cold water with the target discharge in the inlet tube passes through the pipeline and flows into the outlet pipe to make the play water temperature keep at the target temperature, thereby improve user's experience.
As an alternative embodiment, the gas water heater closes the water regulating valve if the current water flow rate is restored to the reference water flow rate.
In implementation, if the gas water heater detects that the current water flow rate is restored to the reference water flow rate (i.e., the value of the current water flow rate is equal to the value of the reference water flow rate), the gas water heater closes the water regulating valve.
As an optional embodiment, before the gas water heater controls the opening of the water regulating valve according to the target water flow, the gas water heater may further determine whether the target water flow is greater than or equal to a preset second water flow threshold. And if the target water flow is greater than or equal to a preset second water flow threshold value, determining the second water flow threshold value as the target water flow.
In practice, the second water flow threshold is the maximum water flow value of the cold water in the water inlet pipe flowing into the water outlet pipe through the pipeline, and can be set by a technician according to experience or actual conditions. For example, the second water flow threshold may be set at 3L. When target discharge is too big, can lead to the water yield that flows into in the heat exchanger to reduce, the temperature of water in the heat exchanger can be higher and higher thereupon, influences user experience. Therefore, the gas water heater needs to compare the target water flow with the preset second water flow threshold, and if the target water flow is greater than or equal to the preset second water flow threshold, the second water flow threshold is determined as the target water flow. If the target water flow is less than the preset second water flow threshold, the target water flow remains unchanged.
The embodiment of the application provides a constant temperature control method, which is applied to a gas water heater, wherein a water inlet pipe and a water outlet pipe of the gas water heater are communicated through a pipeline, a water regulating valve is arranged on the pipeline, and the method comprises the following steps: firstly, the gas water heater acquires the current water flow of cold water flowing in through the water inlet pipe, and if the difference value between the reference water flow and the current water flow is larger than or equal to a preset first water flow threshold value, the gas water heater acquires the inlet water temperature of the cold water, the outlet water temperature of hot water flowing out through the water outlet pipe and the target water temperature. Then, the gas water heater determines the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow, and controls the opening of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline. Like this, when the discharge of the cold water that the inlet tube flowed in reduced, when the temperature that leads to the hot water that the outlet pipe flows out was higher than the target temperature, the cold water with the target discharge in the inlet tube passes through the pipeline and flows into the outlet pipe to make the play water temperature keep at the target temperature, thereby improve user's experience.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
The embodiment of this application still provides a thermostatic control device, as shown in fig. 3, the device is applied to gas heater, and this gas heater's inlet tube and outlet pipe pass through the pipeline intercommunication, are provided with the water transfer valve on this pipeline, and the device includes:
the first obtaining module 310 is used for obtaining the current water flow of the cold water flowing in through the water inlet pipe.
The second obtaining module 320 is configured to obtain an inlet water temperature of the cold water, an outlet water temperature of the hot water flowing out through the outlet pipe, and a target water temperature if a difference between the reference water flow and the current water flow is greater than or equal to a preset first water flow threshold.
The first determining module 330 is configured to determine a target water flow rate of cold water flowing from the water inlet pipe into the water outlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature, and the current water flow rate.
And the first control module 340 is configured to control the opening of the water regulating valve according to the target water flow, so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline.
As an optional implementation, the apparatus further comprises:
and the second determining module is used for determining the average water flow of the cold water flowing in through the water inlet pipe within a preset time length and determining the average water flow as the reference water flow.
As an optional implementation, the apparatus further comprises:
and the second control module is used for controlling the water regulating valve to be closed if the current water flow is restored to the reference water flow.
As an optional implementation, the apparatus further comprises:
and the third determination module is used for determining the second water flow threshold value as the target water flow if the target water flow is greater than or equal to a preset second water flow threshold value.
The embodiment of the application provides a constant temperature control device, and the device is applied to gas heater, and this gas heater's inlet tube and outlet pipe pass through the pipeline intercommunication, are provided with the water transfer valve on this pipeline. The gas water heater obtains the current water flow of cold water flowing in through the water inlet pipe, and if the difference value between the reference water flow and the current water flow is larger than or equal to a preset first water flow threshold value, the gas water heater obtains the inlet water temperature of the cold water, the outlet water temperature of hot water flowing out through the water outlet pipe and the target water temperature. Then, the gas water heater determines the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow, and controls the opening of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline. Like this, when the discharge of the cold water that the inlet tube flowed in reduced, when the temperature that leads to the hot water that the outlet pipe flows out was higher than the target temperature, the cold water with the target discharge in the inlet tube passes through the pipeline and flows into the outlet pipe to make the play water temperature keep at the target temperature, thereby improve user's experience.
In one embodiment, a computer device is provided, as shown in fig. 4, comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor to, when executed, perform the method steps of image processing described above.
In an embodiment, a computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method of image processing.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (11)

1. A constant temperature control method is characterized in that the method is applied to a gas water heater, a water inlet pipe and a water outlet pipe of the gas water heater are communicated through a pipeline, a water regulating valve is arranged on the pipeline, and the method comprises the following steps:
acquiring the current water flow of cold water flowing in through the water inlet pipe;
if the difference value between the reference water flow and the current water flow is greater than or equal to a preset first water flow threshold value, acquiring the inlet water temperature of the cold water, the outlet water temperature of the hot water flowing out through the water outlet pipe and a target water temperature;
determining a target water flow rate of cold water flowing from the water inlet pipe into the water outlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow rate;
and controlling the opening degree of the water regulating valve according to the target water flow so that the cold water with the target water flow flows into the water outlet pipe from the water inlet pipe through the pipeline.
2. The thermostatic control method according to claim 1, wherein the calculation formula for determining the target water flow rate of the cold water flowing from the inlet pipe into the outlet pipe through the pipe according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow rate is:
Figure FDA0003083512160000011
where M represents the target water flow rate, GH represents the outlet water temperature, TH represents the target water temperature, NW represents the current water flow rate, and CH represents the inlet water temperature.
3. The thermostatic control method of claim 1, wherein prior to obtaining the current flow rate of cold water flowing in through the inlet tube, the method further comprises:
and determining the average water flow of cold water flowing in through the water inlet pipe within a preset time length, and determining the average water flow as the reference water flow.
4. The method of claim 1, further comprising:
and if the current water flow is restored to the reference water flow, the gas water heater closes the water regulating valve.
5. The method of claim 1, wherein prior to controlling the opening of the water regulating valve based on the target water flow rate, the method further comprises:
and if the target water flow is greater than or equal to a preset second water flow threshold value, determining the second water flow threshold value as the target water flow.
6. The utility model provides a thermostatic control device, its characterized in that, the device is applied to gas heater, gas heater's inlet tube and outlet pipe pass through the pipeline intercommunication, be provided with the water transfer valve on the pipeline, the device includes:
the first acquisition module is used for acquiring the current water flow of cold water flowing in through the water inlet pipe;
the second obtaining module is used for obtaining the inlet water temperature of the cold water, the outlet water temperature of the hot water flowing out through the water outlet pipe and the target water temperature if the difference value between the reference water flow and the current water flow is larger than or equal to a preset first water flow threshold value;
the first determination module is used for determining the target water flow of the cold water flowing into the water outlet pipe from the water inlet pipe through the pipeline according to the inlet water temperature, the outlet water temperature, the target water temperature and the current water flow;
and the first control module is used for controlling the opening of the water regulating valve according to the target water flow so as to enable the cold water with the target water flow to flow into the water outlet pipe from the water inlet pipe through the pipeline.
7. A thermostat control device according to claim 6, characterized in that the device comprises:
and the second determination module is used for determining the average water flow of the cold water flowing in through the water inlet pipe within a preset time length and determining the average water flow as the reference water flow.
8. A thermostat control device in accordance with claim 6, wherein the device further comprises:
and the second control module is used for controlling the water regulating valve to be closed if the current water flow is restored to the reference water flow.
9. A thermostat control device in accordance with claim 6, wherein the device further comprises:
and the third determination module is used for determining the second water flow threshold value as the target water flow if the target water flow is greater than or equal to a preset second water flow threshold value.
10. A computer device comprising a memory and a processor, the memory having stored thereon a computer program operable on the processor, wherein the processor, when executing the computer program, performs the steps of the method of any of claims 1 to 5.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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CN113531915B (en) * 2021-07-28 2022-10-11 华帝股份有限公司 Water temperature adjusting method and device
CN114562819A (en) * 2021-12-09 2022-05-31 浙江达峰科技有限公司 Constant temperature control method for water heater

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