CN112254349A - Zero-cold-water supply system, control method of zero-cold-water supply system and water heater - Google Patents
Zero-cold-water supply system, control method of zero-cold-water supply system and water heater Download PDFInfo
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- CN112254349A CN112254349A CN201910669290.1A CN201910669290A CN112254349A CN 112254349 A CN112254349 A CN 112254349A CN 201910669290 A CN201910669290 A CN 201910669290A CN 112254349 A CN112254349 A CN 112254349A
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- water
- temperature
- zero
- cold
- circulating pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/12—Arrangements for connecting heaters to circulation pipes
- F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
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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
Abstract
The invention discloses a zero-cold water supply system, a control method of the zero-cold water supply system and a water heater, wherein the zero-cold water supply system comprises a circulating pump, a hot water pipe, a cold water pipe, a plurality of temperature detectors and a controller.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a zero-cold-water supply system, a control method of the zero-cold-water supply system and a water heater.
Background
Some water can be reserved in the water outlet pipeline after the water heater is used for each time, when the water heater is used for the next time, the water in the water outlet pipeline is cooled to become cold water, a user can use hot water after all the cold water in the water outlet pipeline is discharged, water is wasted, and inconvenience is brought to the user. At present, a method for solving the problem of cold water in a pipeline is to add a water pump in a water heater and circularly heat the cold water in the pipeline before people bathe, so that the effect of zero cold water is achieved. However, in practical application, because the pipeline of the hot water pipe is long, the temperature of hot water flowing from the heat exchange part to the water using part can be reduced, so that a user can not accurately judge whether the water using part reaches the required temperature, the experience effect of the user is influenced, and the practicability of the water heater is reduced.
Disclosure of Invention
The invention mainly aims to provide a zero-cold-water supply system, aiming at solving the technical problem of improving the practicability of a water heater.
In order to achieve the above object, the present invention provides a zero-cold water supply system comprising:
a circulation pump;
the water inlet end of the hot water pipe is communicated with the water outlet of the circulating pump, and the water outlet end of the hot water pipe is communicated with the water inlets of the plurality of water-using devices;
one end of the cold water pipe is communicated with a water inlet of the circulating pump, and the other end of the cold water pipe is communicated with a water outlet end of the hot water pipe, so that the circulating pump, the hot water pipe and the cold water pipe form a circulating water path;
the temperature detectors are respectively arranged at water inlets of the water utilization equipment and are used for respectively detecting the water temperatures of the water inlets of the water utilization equipment and correspondingly outputting a plurality of water temperature detection signals;
the controller is used for controlling the circulating pump and the temperature detectors at corresponding positions to work when a zero cold water selection instruction is received, and controlling the circulating pump and the temperature detectors at corresponding positions to stop working when the water temperature detected by the temperature sensors at corresponding positions reaches a first preset water temperature.
Preferably, the controller is further configured to, before controlling the temperature detectors and the circulation pump at the corresponding positions to operate, obtain water temperature detection signals of the plurality of temperature detectors according to a zero-cold-water initialization control instruction, and determine a distance between each of the water consumption devices and a water outlet of the circulation pump according to the plurality of water temperature detection signals, so as to identify the water consumption device at the corresponding position.
Preferably, the controller determines a distance between each of the water consumption devices and a water outlet of the circulation pump according to the plurality of water temperature detection signals, so that the water consumption devices at the corresponding positions are specifically:
calculating the difference between the water temperature of the water inlet of each water using device and the average water temperature by acquiring the water temperatures of the water inlets of the water using devices and calculating the average water temperature;
when the difference value between the water temperature of the water inlet of each water-using device and the average water temperature is within a preset threshold value, controlling the circulating pump to work, and recording the time when the water temperature of the water inlet of each water-using device reaches a second preset water temperature so as to determine the distance between each water-using device and the water outlet of the circulating pump;
and when the difference value between the water temperature of the water inlet of each water using device and the average water temperature is not within the preset threshold value, closing the circulating pump until the difference value between the water temperature of the water inlet of each water using device and the average water temperature is within the preset threshold value.
Preferably, the controller includes a plurality of control modules, and a signal end of each control module is connected to a signal end of a corresponding temperature detector one by one.
Preferably, each control module is further connected with a terminal device, and displays the distance between the water utilization devices and the water outlet of the circulating pump, so that a user can name and select the water utilization devices.
Preferably, the zero-cold-water supply system further comprises a plurality of three-way valves sequentially arranged on the hot water pipe, one water outlet of each three-way valve is communicated with a water inlet of the water consumption equipment, the other water outlet of each three-way valve is communicated with a water inlet of the adjacent three-way valve or a water inlet of the water consumption equipment, and a water inlet of each three-way valve is connected with a water outlet of the adjacent three-way valve or a water outlet of the circulating pump.
Preferably, the temperature detectors are respectively disposed on the three-way valves in sequence.
Preferably, the temperature detector comprises a temperature probe, a temperature detection circuit, a power module and a first main control chip, and the temperature probe is arranged on the three-way valve;
the power output end of the power module, the power end of the temperature detection circuit and the power end of the first main control chip are interconnected, the signal input end of the temperature detection circuit is connected with the signal end of the temperature probe, the signal output end of the temperature detection circuit is connected with the first signal end of the first main control chip, and the signal end of the first main control chip is connected with the signal end of the relay controller;
the temperature detection circuit and the temperature probe are used for detecting the water temperature of the three-way valve and outputting a water temperature detection signal to the first main control chip;
the first main control chip is used for carrying out temperature acquisition or standby according to the control signal of the controller and outputting the water temperature detection signal to the controller during temperature acquisition.
Preferably, the control module comprises a switching power supply module, a display screen, a key circuit and a second main control chip;
the power input end of the switch power supply module is connected with a mains supply, the power output end of the switch power supply module is connected with the power supply end of the second main control chip, the signal end of the display screen is connected with the first signal end of the second main control chip, the signal end of the key circuit is connected with the second signal end of the second main control chip, and the third signal end of the second main control chip is connected with the signal end of the first main control chip;
the switching power supply module is used for converting the voltage of the commercial power and outputting a direct-current power supply;
the key circuit is used for correspondingly outputting a trigger signal to the second main control chip according to a zero cold water selection instruction or a temperature regulation instruction of a user;
and the second main control chip is used for controlling the temperature detector and the circulating pump at corresponding positions to work according to the trigger signal and outputting a display signal to the display screen for water temperature display.
The invention also provides a control method of the zero-cold-water supply system, wherein the zero-cold-water supply system comprises the following steps:
a circulation pump;
the water inlet end of the hot water pipe is communicated with the water outlet of the circulating pump, and the water outlet end of the hot water pipe is communicated with the water inlets of the plurality of water-using devices;
one end of the cold water pipe is communicated with a water inlet of the circulating pump, and the other end of the cold water pipe is communicated with a water outlet end of the hot water pipe, so that the circulating pump, the hot water pipe and the cold water pipe form a circulating water path;
the temperature detectors are respectively arranged at water inlets of the water utilization equipment and are used for respectively detecting the water temperatures of the water inlets of the water utilization equipment;
the control method of the zero-cold water supply system comprises the following steps:
acquiring a zero cold water selection instruction of a user;
starting the circulating pump and the temperature detector at the corresponding position, and acquiring the water temperature at the water inlet of the water using equipment at the corresponding position;
and when the water temperature of the water inlet of the water using equipment at the corresponding position reaches a first preset water temperature, controlling the circulating pump and the temperature detector at the corresponding position to stop working.
Preferably, before the step of obtaining a user zero cold water selection instruction, the method further comprises:
acquiring a zero cold water initialization control instruction;
the method comprises the steps of obtaining the water temperatures of water inlets of a plurality of water using devices, and determining the distance between each water using device and a water outlet of a circulating pump according to the water temperatures of the water inlets of the plurality of water using devices, so that the water using devices at corresponding positions are identified.
Preferably, the step of acquiring water temperatures of water outlets of a plurality of water consuming devices, and determining a distance between each water consuming device and a water outlet of the circulation pump according to the water temperatures of the water inlets of the plurality of water consuming devices, so as to identify the corresponding position of the temperature detector specifically includes:
acquiring water temperatures of water inlets of a plurality of water using devices, and calculating an average water temperature;
calculating the difference between the water temperature of the water inlet of each water using device and the average water temperature;
when the difference value between the water temperature of the water inlet of each water-using device and the average water temperature is within a preset threshold value, starting the circulating pump and the plurality of temperature detectors, and recording the time when the water temperature of the water inlet of each water-using device reaches a second preset water temperature so as to determine the distance between each water-using device and the water outlet of the circulating pump;
and when the difference value between the water temperature of the water inlet of each water using device and the average water temperature is not within the preset threshold value, closing the circulating pump and the plurality of temperature detectors until the difference value between the water temperature of the water inlet of each water using device and the average water temperature is within the preset threshold value.
The invention also proposes a water heater comprising a zero cold water supply system as described above;
the control program of the zero-cold water supply system realizes the steps of the control method of the zero-cold water supply system when being executed by the processor.
The zero-cold-water supply system realizes water temperature measurement of the water inlet of each water-using device by arranging the temperature detectors on the water outlets of the circulating water path, when a user starts to use zero cold water, a zero-cold-water selection instruction is correspondingly output, the controller controls the circulating pump and the temperature detectors at corresponding positions to work, the circulating pump carries out heat exchange circulation on hot water in the hot water pipe and cold water in the cold water pipe, and when the water temperature detected by the temperature sensors at corresponding positions reaches a first preset water temperature, namely the integral water temperature of a pipeline between the water-using device and the circulating pump reaches the first preset water temperature, the controller controls the circulating pump to be closed so as to finish the preheating process of the circulating water path, so that the user can use the hot water of the hot water pipe through the water-using device in time, the pipeline at the rear section of the water-using device is not heated basically, so that the zero cold water is more, thereby improving the practicability of the water heater.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a unified embodiment of a zero-chilled-water supply system according to the present invention;
FIG. 2 is a schematic diagram showing the temperature rise of each water consuming apparatus of the present invention;
FIG. 3 is a schematic diagram of the temperature detector and controller of the present invention;
FIG. 4 is a schematic diagram of a temperature detector according to the present invention;
FIG. 5 is a schematic view of the check valve of the present invention;
FIG. 6 is a block diagram of a temperature detector according to the present invention;
FIG. 7 is a block diagram of a control module according to the present invention;
FIG. 8 is a schematic circuit block diagram of another embodiment of a temperature detector and controller of the present invention;
FIG. 9 is a schematic circuit block diagram of a controller according to another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic flow chart illustrating a method for controlling a zero-chilled-water supply system according to an embodiment of the present invention;
FIG. 12 is a schematic flow chart illustrating another embodiment of a method for controlling a zero chilled water supply according to the present invention;
fig. 13 is a flowchart illustrating a step S500 of the control method of the zero-cold water supply system according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Circulating |
62 | Second straight pipe |
| 20 | |
63 | |
| 30 | |
121 | |
| 40 | |
122 | |
| 50 | Three- |
123 | First main control chip |
| 60 | |
124 | First wireless module |
| 70 | One- |
210 | Switch |
| 80 | |
220 | |
| 100 | |
230 | |
| 200 | |
240 | Second |
| 110 | |
250 | |
| 120 | |
260 | |
| 61 | First straight pipe |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is: the method comprises three parallel schemes, wherein the scheme is taken as an A/B (A/B) as an example, the scheme comprises the scheme A, the scheme B or the scheme A and the scheme B simultaneously satisfy, in addition, the technical schemes between the various embodiments can be combined with each other, but the technical schemes must be based on the realization of the technical schemes by a person skilled in the art, and when the technical schemes are mutually contradictory or can not be realized, the combination of the technical schemes is not considered to exist, and the protection scope of the invention is not within the protection scope of the invention.
The invention provides a zero-cold-water supply system.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a zero-cold-water-supply system according to an embodiment of the present invention, in which the zero-cold-water-supply system includes:
a circulation pump 10;
the water inlet end of the hot water pipe 20 is communicated with the water outlet of the circulating pump, and the water outlet end of the hot water pipe 20 is communicated with the water inlets of the water utilization devices 30;
one end of the cold water pipe 40 is communicated with a water inlet of the circulating pump 10, and the other end of the cold water pipe 40 is communicated with a water outlet end of the hot water pipe 20, so that the circulating pump 10, the hot water pipe 20 and the cold water pipe 40 form a circulating water path;
the temperature detectors 100 are respectively arranged at the water inlets of the water consumption devices 30, and the temperature detectors 100 are used for respectively detecting the water temperatures at the water inlets of the water consumption devices 30 and correspondingly outputting a plurality of water temperature detection signals;
and a controller (not shown), signal ends of which are respectively connected with signal ends of the plurality of temperature detectors 100, the controller being configured to control the circulation pump 10 and the temperature detectors 100 at corresponding positions to operate when receiving a zero cold water selection instruction, and to control the circulation pump 10 and the temperature detectors 100 at corresponding positions to stop operating when the water temperature detected by the temperature sensors 100 at corresponding positions reaches a first preset water temperature.
The hot water pipe 20, the cold water pipe 40 and the circulating pump 10 form a circulating water path, a plurality of water consumption devices 30 are sequentially arranged on the circulating water path, the water consumption devices 30 can be connected with the hot water pipe 20 through a three-way valve 50 or other structures, the water consumption devices 30 respectively obtain hot water from the hot water pipe 20, in one embodiment, one end of the cold water pipe 40 communicated with the circulating pump 10 is also communicated with a water source, one end of the cold water pipe 40 communicated with the hot water pipe 20 is also communicated with the water consumption devices 30, meanwhile, the zero-cold water supply system further comprises a heat exchange device 70 such as a plate exchanger and the like, the heat exchange device 70 is used for exchanging heat with water in the circulating water path, namely, cold water flows into one end of the cold water pipe 40, the cold water in the cold water pipe 40 can be cold water in the hot water pipe 20 and flows into the heat exchange device 70 through the circulating pump 10, hot water flows out from the other end of the heat exchanger 70 to the hot water pipe 20, and the hot water flows into the cold water pipe 40 through the check valve 50 and is heated by the circulating pump 10.
The plurality of temperature detectors 100 are correspondingly arranged at the water inlet of the plurality of water consuming devices 30, that is, the water outlet of the hot water pipe 20, the temperature detectors 100 can be arranged in the hot water pipe 20 or on the surface of the hot water pipe 20, when a user needs to start the zero-cold-water function of a first water consuming device 30 in the plurality of water consuming devices 30, the temperature detector 100 arranged at the water consuming device 30 is selected to work through the controller, the temperature detectors 100 at other positions keep standby work, and simultaneously the circulating pump 10 is controlled to work, the circulating pump 10 starts to heat the circulating water, the temperature detector 100 starts to detect the water temperature at the water outlet of the hot water pipe 20, and sends a water temperature detection signal to the controller through a wired or wireless communication mode, when the water temperature at the water outlet reaches a first preset water temperature, that is, that the whole hot water pipe 20 between the water consuming device 30 and the circulating pump 10 is filled with hot water, this water equipment 30's back end pipeline then does not heat basically for zero cold water is more energy-conserving, has improved user experience, and controller control temperature detector 100 gets into standby work simultaneously, and the controller controls circulating pump 10 stop work simultaneously, and first preset temperature can be set by the user by oneself.
The zero-cold-water supply system can be a zero-cold-water gas water heater or a zero-cold-water wall-mounted boiler and the like, and the controller can be a single controller, such as a host of the water heater, namely the controller is directly connected with the plurality of temperature detectors 100, the circulating pump 10 and the heat exchange device 70 and can simultaneously control the plurality of temperature detectors 100, the circulating pump 10 and the heat exchange device 70 to work; the controller may also be a plurality of control modules 200, the control modules 200 are respectively connected to a host of the water heater, the host is configured to control the circulation pump 10 and the heat exchanging device 70 to operate, and the control modules 200 are configured to receive a zero cold water command from the host or a user and control the corresponding temperature detectors 100 to operate, so as to avoid signal transmission difficulty caused by an excessive distance. The control module is connected between the temperature detector 100 and the host, and correspondingly works according to a temperature setting instruction sent by the host, a zero cold water opening instruction, a temperature instruction of a corresponding position, a real-time temperature detection instruction and the like.
The temperature detector 100, the control module 200 and the host can be in communication connection in a wired or wireless mode, signal transmission is stable when the temperature detector is in the wired mode, and the wiring problem can be solved when the temperature detector is in the wireless mode, so that the temperature detector, the control module and the host can be selected correspondingly.
The zero-cold-water supply system of the invention realizes the water temperature measurement of the water inlet of each water using equipment 300 by arranging the temperature detectors 100 on a plurality of water outlets of the circulating water path, when a user starts to use zero cold water, a zero-cold-water selection instruction is correspondingly output, the controller controls the circulating pump 10 and the temperature detectors 100 at corresponding positions to work, the circulating pump 10 carries out heat exchange circulation on hot water in the hot water pipe 20 and cold water in the cold water pipe 40, and when the water temperature detected by the temperature sensors 100 at corresponding positions reaches a first preset water temperature, namely the whole water temperature of a pipeline between the water using equipment 30 and the circulating pump 10 reaches the first preset water temperature, the controller controls the circulating pump 10 to be closed so as to finish the preheating process of the circulating water path, so that the user can use the hot water of the hot water pipe through the water using equipment 30 in time, the pipeline at the rear section of the water using equipment 30 is not heated basically, user experience is improved, and therefore the practicability of the water heater is improved.
Further, the controller is further configured to, before controlling the temperature detectors 100 and the circulation pump 10 at the corresponding positions to operate, obtain water temperature detection signals of the plurality of temperature detectors 100 according to the zero-cold-water initialization control instruction, and determine a distance between each water consumer 30 and the water outlet of the circulation pump 10 according to the plurality of water temperature detection signals, so as to identify the water consumers 30 at the corresponding positions.
In order to ensure that a user can accurately control the operation of the temperature detector 100 at the corresponding position so as to enable the water consumption equipment 30 at the corresponding position to obtain hot water and improve the accuracy and the applicability, before the water consumption equipment 30 at the corresponding position is subjected to zero cold water control, the distance between the water consumption equipment 30 at each position and the circulating pump 10 needs to be sequenced and numbered, namely, in an initial state, the zero cold water control is performed on the whole circulating water channel, the distance between each water consumption equipment 30 and the water outlet of the circulating pump 10 is determined according to the change condition of a plurality of water temperature detection signals, so that the water consumption equipment 30 at the corresponding position is identified, the controller can name the positions of the plurality of water consumption equipment 30 by corresponding numbers, and can perform graphic display on the terminal equipment so that the user can directly perform zero cold water control on any water consumption equipment 30 on the terminal equipment.
In one embodiment, the controller determines the distance between each water consumer 30 and the water outlet of the circulation pump 10 according to the plurality of water temperature detection signals, so as to identify the water consumers 30 at the corresponding positions as:
calculating the difference between the water temperature at the water inlet of each water using device 30 and the average water temperature by acquiring the water temperatures at the water inlets of the water using devices 30 and calculating the average water temperature;
when the difference value between the water temperature at the water inlet of each water consumption device 30 and the average water temperature is within the preset threshold value, controlling the circulating pump 10 to work, and recording the time when the water temperature at the water inlet of each water consumption device 30 reaches the second preset water temperature so as to determine the distance between each water consumption device 30 and the water outlet of the circulating pump 10;
and when the difference value between the water temperature at the water inlet of each water using device 30 and the average water temperature is not within the preset threshold value, closing the circulating pump 10 until the difference value between the water temperature at the water inlet of each water using device 30 and the average water temperature is within the preset threshold value.
As shown in fig. 2, in the initial state, that is, the zero-cold water supply system is in the stop state, by obtaining the water temperatures at the inlets of the plurality of water consumption devices 30 and calculating the average water temperature, when the water temperatures at the inlets of the water consumption devices 30 and the average water temperature are within the preset threshold value, for example, within a range of-2 degrees to 2 degrees, it indicates that all the hot water pipes 20 of the zero-cold water supply system are cold water, and then the circulation pump 10 and the temperature detectors 100 are controlled to start to operate, the cold water in the hot water pipes 20 is gradually heated, at this time, the controller records the time when each temperature detector 100 reaches the second preset water temperature, the temperature detector reaching the second preset water temperature first indicates that the water consumption device 30 at that position is closer to the circulation pump 10, and then the temperature detector 100 reaching the second preset water temperature indicates that the water consumption device 30 at that position is farther from the circulation pump 10, thereby determining the distance between the circulating pumps 10 of the water users 30, and the second preset water temperature should be less than the first preset water temperature in order to reduce energy consumption.
When the water temperature at the water inlet of each water consumption device 30 and the average water temperature are not within the preset threshold value, it indicates that hot water exists in the hot water pipe 20, and at this time, the circulating pump 10 can be turned off to discharge hot water in a natural cooling manner or from the water consumption device 30, so as to ensure that all the hot water pipe 20 is cold water.
When the controller comprises a plurality of control modules 200, the plurality of control modules 200 are simultaneously connected with the terminal equipment and the host of the water heater, and the distances between the plurality of water using equipment 30 and the water outlet of the circulating pump are displayed for the user to name and select, and meanwhile, the host of the water heater controls the working state of the circulating pump 10.
As shown in fig. 1, in an embodiment, in order to facilitate installation and maintenance of the water using equipment 30, the zero-cooling water supply system further includes a plurality of three-way valves 50 sequentially disposed on the hot water pipes, one water outlet of each of the three-way valves 50 is communicated with a water inlet of the water using equipment 30, another water outlet of each of the three-way valves 50 is communicated with a water inlet of an adjacent three-way valve 50 or a water inlet of the water using equipment 30, and a water inlet of each of the three-way valves 50 is connected with a water outlet of the adjacent three-way.
In this embodiment, the water using device 30 disposed at the middle position is connected to the hot water pipe 20 and/or the cold water pipe 40 through the three-way valve 50, and it is understood that the water using device disposed at the middle position may also be connected to the hot water pipe and/or the cold water pipe through the H-valve 60 and the three-way valve 50, which is selected according to the requirement.
The water using device 30 disposed at the farthest end is connected to the hot water pipe 20 and/or the cold water pipe 40 through an H-valve 60, as shown in fig. 5, the H-valve 60 includes a first straight pipe 61, a second straight pipe 62, and a horizontal pipe 63 communicating the first straight pipe 61 with the second straight pipe 62, the hot water pipe 20 is communicated with the water using device 30 through the first straight pipe 61, the hot water pipe 20 is communicated with the cold water pipe 40 through the horizontal pipe 63, the cold water pipe 40 is communicated with the water using device 30 through the second straight pipe 62, and the check valve 50 is disposed in the horizontal pipe 63.
The H valve 60 is connected to the water outlet end of the hot water pipe 20 and the water outlet end of the cold water pipe 40, when zero cold water control is performed, hot water of the hot water pipe 20 is output to the cold water pipe 40, when a user normally uses the water using equipment 30, hot water of the hot water pipe 20 and cold water of the cold water pipe 40 are output to the water using equipment 30 through the first straight pipe 61 and the second straight pipe 62, and the hot water pipe 20 and the cold water pipe 40 can be conveniently connected with the water using equipment 30 by arranging the H valve 60.
In order to detect the water temperature of the farthest water using device 30, the temperature detector 100 may be installed on the outer wall of the horizontal tube 63, or may be directly inserted into the horizontal tube 63, the temperature detector 100 may be correspondingly disposed according to different sampling accuracy, and no specific limitation is made herein, and a check valve 70 may be further disposed in the H valve at this position, so as to implement the water path circulation when performing the zero cold water control on the entire water path.
Meanwhile, in order to facilitate installation and maintenance of the temperature detector 100 in the middle section, as shown in fig. 3 and 4, the temperature detectors 100 are respectively and sequentially disposed on the three-way valve 50, and the temperature detectors 100 may be installed on the three-way valve 50 in other manners such as clamping, adhering, or snapping.
As shown in fig. 6, the temperature detector includes a temperature detecting circuit 110, a temperature detecting circuit 122, a power module 121, and a first main control chip 123, 110, which are disposed on the three-way valve;
the power output end of the power module 121, the power end of the temperature detection circuit 122 and the power end of the first main control chip 123 are interconnected, the signal input end of the temperature detection circuit 122 is connected with the signal end of the temperature detection circuit 110, the signal output end of the temperature detection circuit 122 is connected with the first signal end of the first main control chip 123, and the signal end of the first main control chip 123 is connected with the signal end of the control module 200;
the first main control chip 123 is configured to perform temperature acquisition or standby according to the control signal of the control module 200, and output a water temperature detection signal to the control module 200 during temperature acquisition.
In this embodiment, the power module 121 may be a battery, a portable power source, or a power conversion circuit, for example, for convenience of installation and maintenance, the power module may be a button battery, but when the power module 121 is a battery, the endurance of the battery is limited, so that, for the duration of endurance, the power module 121 may also be a power conversion circuit, and the power conversion circuit is connected to the power end of the control module 200, and the power conversion circuit supplies power to the power conversion circuit, so as to improve the endurance. The structure of the power module 121 may be selected according to the power consumption of the temperature detector 100, and the voltage of the power module 121 may be set, for example, 6V, 5V, 3V, and the like.
The temperature probe 110 is disposed on the three-way valve 50, the temperature probe 110 may be a pipe clamp type temperature probe or a probe with other structure, and the temperature detection circuit 122 and the temperature probe 110 correspondingly output a water temperature detection signal to the first main control chip 123 according to the water temperature of the three-way valve 50.
The first main control chip 123 may be an MCU, a CPU, or other types of chips, the first main control chip 123 may be connected to the control module 200 in a wired or wireless manner, and correspondingly works or waits according to a control signal of the control module 200, and the first main control chip 123 is further provided with a burning port for burning a corresponding control program, so as to update the control program according to different working requirements, thereby reducing cost waste.
As shown in fig. 7, the control module 200 includes a switching power supply module 210, a display screen 230, a key circuit 220 and a second main control chip 240;
a power input end of the switching power supply module 210 is connected with a mains supply, a power output end of the switching power supply module 210 is connected with a power supply end of the second main control chip 240, a signal end of the display screen 230 is connected with a first signal end of the second main control chip 240, a signal end of the key circuit 220 is connected with a second signal end of the second main control chip 240, and a third signal end of the second main control chip 240 is connected with a signal end of the first main control chip;
the switching power supply module 210 is configured to perform voltage conversion on the commercial power and output a direct current power supply;
the key circuit 220 is configured to output a trigger signal to the second main control chip 240 correspondingly according to a zero cold water selection instruction or a temperature adjustment instruction of a user;
and the second main control chip 240 is used for controlling the temperature detector 100 and the circulation pump 10 at corresponding positions to work according to the trigger signal, and outputting a display signal to the display screen 230 for displaying the water temperature.
In this embodiment, as shown in fig. 10, a plurality of key switches are disposed on the display screen 230, and a user can perform temperature control and zero-cold-water function control by clicking the key switches, and meanwhile, when performing the zero-cold-water function control, the preset temperature and the real-time temperature can be displayed on the display screen 230, and the preset temperature is adjustable.
The switching power supply module 210 may include a rectifying circuit, a filtering circuit, a transforming circuit, a voltage stabilizing circuit, etc., a power supply end of the switching power supply module 210 is connected to the commercial power, at this time, as shown in fig. 3, the control module may be plugged into any one of the sockets, and the switching power supply module 210 outputs the dc power after rectifying, filtering, transforming and stabilizing the commercial power, so as to provide a working power for the second main control chip 240.
The second main control chip 240 communicates with the water heater host and the first main control chip 123 wirelessly or in a wired manner, when a user sends a zero cold water selection instruction through the display screen 230, the second main control chip 240 correspondingly outputs a control signal to the first main control chip 123, the first main control chip 123 starts to work, meanwhile, the circulating pump 10 starts to work to heat circulating water, the first main control chip 123 simultaneously obtains the water temperature of the water outlet end of the hot water pipe 20, and when the water temperature reaches a preset water temperature, the second main control chip 240 controls the first main control chip 123 to stop working to enter a standby state, so that zero cold water control is realized.
As shown in fig. 8, in order to reduce the problem of wiring or signal transmission between the temperature detector 100 and the control module 200, the temperature detector 100 further includes a first wireless module 124, the control module 200 further includes a second wireless module 250, a signal terminal of the first wireless module 124 is connected to a signal terminal of the first main control chip 123, the second wireless module 250 is connected to a signal terminal of the second main control chip 240, the first main control chip 123 communicates with the second main control chip 240 through the first wireless module 124 and the second wireless module 250, and the first wireless module 124 and the second wireless module 250 are bluetooth modules or wifi modules.
As shown in fig. 9, in order to improve the convenience of operation and reduce the number of wires, the control module 200 is connected to the host or the client via a wireless module, the controller 200 further includes a third wireless module 260, and the control module further receives a zero-cold-water operation command or a temperature adjustment command from a user via the third wireless module 260.
As shown in fig. 1 and 11, the present invention also provides a control method of a zero-cold water supply system, which includes:
a circulation pump 10;
the water inlet end of the hot water pipe 20 is communicated with the water outlet of the circulating pump, and the water outlet end of the hot water pipe 20 is communicated with the water inlets of the water utilization devices 30;
one end of the cold water pipe 40 is communicated with a water inlet of the circulating pump 10, and the other end of the cold water pipe 40 is communicated with a water outlet end of the hot water pipe 20, so that the circulating pump 10, the hot water pipe 20 and the cold water pipe 40 form a circulating water path;
the temperature detectors 100 are respectively arranged at the water inlets of the water consumption devices 30, and the temperature detectors 100 are used for respectively detecting the water temperatures of the water inlets of the water consumption devices 30;
the control method of the zero-cold water supply system comprises the following steps:
s10, acquiring a zero cold water selection instruction of a user;
s20, starting the circulating pump 10 and the temperature detector 100 at the corresponding position, and acquiring the water temperature at the water inlet of the water using equipment 30 at the corresponding position;
and S30, controlling the circulation pump 10 and the temperature detector 100 at the corresponding position to stop working when the water temperature at the water inlet of the water using equipment 30 at the corresponding position reaches a first preset water temperature.
In this embodiment, the hot water pipe 20, the cold water pipe 40 and the circulation pump 10 form a circulation water path, a plurality of water consumption devices 30 are sequentially disposed on the circulation water path, the water consumption devices 30 can be connected to the hot water pipe 20 through a three-way valve 50 or other structures, the water consumption devices 30 respectively obtain hot water from the hot water pipe 20, one end of the cold water pipe 40, which is communicated with the circulation pump 10, is further communicated with a water source, one end of the cold water pipe 40, which is communicated with the hot water pipe 20, is further communicated with the water consumption devices 30, meanwhile, the zero-cold water supply system further includes a heat exchange device 70, such as a plate exchanger, etc., the heat exchange device 70 is used for exchanging heat with water in the circulation water path, that is, cold water flows into one end of the cold water pipe 40, cold water in the cold water pipe 40 can be cold water in the hot water pipe 20, and flows into the heat exchange device 70 through the circulation pump 10, the heat exchange device 70 heats, hot water flows into the cold water pipe 40 through the check valve 50 and is heated by the circulating pump 10 continuously circulating water.
The plurality of temperature detectors 100 are correspondingly arranged at the water inlet of the plurality of water using devices 30, that is, the water outlet of the hot water pipe 20, the temperature detectors 100 can be arranged in the hot water pipe 20 or on the surface of the hot water pipe 20, when a user needs to start the zero-cold-water function of a first water using device 30 in the plurality of water using devices 30, the temperature detector 100 arranged at the water using device 30 is selected by the controller to work, the temperature detectors at other positions keep standby work, and simultaneously the circulating pump is controlled to work, the circulating pump 10 starts to heat the circulating water, the temperature detector 100 starts to detect the water temperature at the water outlet of the hot water pipe 20, and sends a water temperature detection signal to the controller through a wired or wireless communication mode, when the water temperature at the water outlet reaches a first preset water temperature, that is, that the whole hot water pipe between the water using device 30 and the circulating pump 10 is filled with hot water, this water equipment 30's back end pipeline then does not heat basically for zero cold water is more energy-conserving, has improved user experience, and controller control temperature detector 100 gets into standby work simultaneously, and the controller controls circulating pump 10 stop work simultaneously, and first preset temperature can be set by the user by oneself.
The zero-cold-water supply system can be a zero-cold-water gas water heater or a zero-cold-water wall-mounted boiler and the like, and the controller can be a single controller, such as a host of the water heater, namely the controller is directly connected with the plurality of temperature detectors 100, the circulating pump 10 and the heat exchange device 70 and can simultaneously control the plurality of temperature detectors 100, the circulating pump 10 and the heat exchange device 70 to work; the controller may also be a plurality of control modules 200, the control modules 200 are respectively connected to a host of the water heater, the host is configured to control the circulation pump 10 and the heat exchanging device 70 to operate, and the control modules 200 are configured to receive a zero cold water command from the host or a user and control the corresponding temperature detectors 100 to operate, so as to avoid signal transmission difficulty caused by an excessive distance. The control module is connected between the temperature detector 100 and the host, and correspondingly works according to a temperature setting instruction sent by the host, a zero cold water opening instruction, a temperature instruction of a corresponding position, a real-time temperature detection instruction and the like.
The temperature detector 100, the controller and the host can be in communication connection in a wired or wireless mode, signal transmission is stable when the temperature detector, the controller and the host are connected in the wired mode, and the wiring problem can be solved when the temperature detector, the controller and the host are connected in the wireless mode, so that the temperature detector, the controller and the host can be selected correspondingly.
The temperature detectors are arranged on the water outlets of the circulating water path, so that the water temperature of the water inlet of each water using device is measured, when a user starts to use zero-cold water, correspondingly outputting a zero cold water selection instruction, controlling a circulating pump and a temperature detector at a corresponding position to work by a controller, carrying out heat exchange circulation on hot water in a hot water pipe and cold water in a cold water pipe by the circulating pump, when the water temperature detected by the temperature sensor at the corresponding position reaches a first preset water temperature, namely the whole water temperature of a pipeline between the water using equipment and the circulating pump reaches the first preset water temperature, the controller controls the circulating pump to be closed, to finish the preheating process of the circulating water path, so that the user can use the hot water of the hot water pipe through the water using equipment in time, the rear-section pipeline of the water using equipment is basically not heated, so that zero-cold water is more energy-saving, the user experience is improved, and the practicability of the water heater is improved.
As shown in fig. 12, before the step of obtaining the zero cold water selection instruction of the user, the method further includes:
s40, acquiring a zero cold water initialization control instruction;
and S50, acquiring the water temperatures of the water inlets of the plurality of water consumption devices 30, and determining the distance between each water consumption device 30 and the water outlet of the circulating pump 10 according to the water temperatures of the water inlets of the plurality of water consumption devices 30, so as to identify the water consumption devices 30 at corresponding positions.
In order to ensure that a user can accurately control the operation of the temperature detector 100 at the corresponding position so as to enable the water consumption equipment 30 at the corresponding position to obtain hot water and improve the accuracy and the applicability, before the water consumption equipment 30 at the corresponding position is subjected to zero cold water control, the distance between the water consumption equipment 30 at each position and the circulating pump 10 needs to be sequenced and numbered, namely, in an initial state, the zero cold water control is performed on the whole circulating water channel, the distance between each water consumption equipment 30 and the water outlet of the circulating pump 10 is determined according to the change condition of a plurality of water temperature detection signals, so that the water consumption equipment 30 at the corresponding position is identified, the controller can name the positions of the plurality of water consumption equipment 30 by corresponding numbers, and can perform graphic display on the terminal equipment so that the user can directly perform zero cold water control on any water consumption equipment 30 on the terminal equipment.
As shown in fig. 13, the step of acquiring the water temperatures at the water inlets of the plurality of water consumption devices 30, and determining the distance between each water consumption device 30 and the water outlet of the circulation pump 10 according to the water temperatures at the water inlets of the plurality of water consumption devices 30, so as to identify the corresponding position of the temperature detector 100 specifically includes:
s51, acquiring water temperatures of water inlets of a plurality of water using devices 30, and calculating an average water temperature;
s52, calculating the difference between the water temperature at the water inlet of each water consumption device 30 and the average water temperature;
s53, when the difference value between the water temperature at the water inlet of each water consumption device 30 and the average water temperature is within a preset threshold value, starting the circulating pump 10 and the plurality of temperature detectors 100, and recording the time when the water temperature at the water inlet of each water consumption device reaches a second preset water temperature so as to determine the distance between each water consumption device 30 and the water outlet of the circulating pump 10;
and S54, when the difference value between the water temperature of the water inlet of each water using device 30 and the average water temperature is not within the preset threshold value, closing the circulating pump 10 and the plurality of temperature detectors 100 until the difference value between the water temperature of the water inlet of each water using device 30 and the average water temperature is within the preset threshold value.
As shown in fig. 2, in the initial state, that is, the zero-cold water supply system is in the stop state, by obtaining the water temperatures at the inlets of the plurality of water consumption devices 30 and calculating the average water temperature, when the water temperatures at the inlets of the water consumption devices 30 and the average water temperature are within the preset threshold value, for example, within a range of-2 degrees to 2 degrees, it indicates that all the hot water pipes 20 of the zero-cold water supply system are cold water, and then the circulation pump 10 and the temperature detectors 100 are controlled to start to operate, the cold water in the hot water pipes 20 is gradually heated, at this time, the controller records the time when each temperature detector 100 reaches the second preset water temperature, the temperature detector reaching the second preset water temperature first indicates that the water consumption device 30 at that position is closer to the circulation pump 10, and then the temperature detector 100 reaching the second preset water temperature indicates that the water consumption device 30 at that position is farther from the circulation pump 10, thereby determining the distance between the circulating pumps 10 of the water users 30, and the second preset water temperature should be less than the first preset water temperature in order to reduce energy consumption.
When the water temperature at the water inlet of each water consumption device 30 and the average water temperature are not within the preset threshold value, it indicates that hot water exists in the hot water pipe 20, and at this time, the circulating pump 10 can be turned off to discharge hot water in a natural cooling manner or from the water consumption device 30, so as to ensure that all the hot water pipe 20 is cold water.
When the controller comprises a plurality of control modules 200, the plurality of control modules 200 are simultaneously connected with the terminal equipment and the host of the water heater, and the distances between the plurality of water using equipment 30 and the water outlet of the circulating pump are displayed for the user to name and select, and meanwhile, the host of the water heater controls the working state of the circulating pump 10.
The invention also proposes a water heater comprising a zero cold water supply system as described above;
the control program of the zero-cold water supply system is executed by the processor to realize the steps of the control method of the zero-cold water supply system.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A zero cold water supply system, comprising:
a circulation pump;
the water inlet end of the hot water pipe is communicated with the water outlet of the circulating pump, and the water outlet end of the hot water pipe is communicated with the water inlets of the plurality of water-using devices;
one end of the cold water pipe is communicated with a water inlet of the circulating pump, and the other end of the cold water pipe is communicated with a water outlet end of the hot water pipe, so that the circulating pump, the hot water pipe and the cold water pipe form a circulating water path;
the temperature detectors are respectively arranged at water inlets of the water utilization equipment and are used for respectively detecting the water temperatures of the water inlets of the water utilization equipment and correspondingly outputting a plurality of water temperature detection signals;
the controller is used for controlling the circulating pump and the temperature detectors at corresponding positions to work when a zero cold water selection instruction is received, and controlling the circulating pump and the temperature detectors at corresponding positions to stop working when the water temperature detected by the temperature sensors at corresponding positions reaches a first preset water temperature.
2. The zero-cold water supply system according to claim 1, wherein the controller is further configured to obtain water temperature detection signals of a plurality of the temperature detectors according to a zero-cold water initialization control command before controlling the operation of the temperature detectors and the circulation pump at the corresponding positions, and determine a distance between each of the consumers and an outlet of the circulation pump according to the water temperature detection signals, so as to identify the consumers at the corresponding positions.
3. The zero-cold-water supply system according to claim 2, wherein the controller determines a distance between each of the water consumption devices and the water outlet of the circulation pump according to a plurality of the water temperature detection signals, so as to identify the water consumption devices at corresponding positions as:
calculating the difference between the water temperature of the water inlet of each water using device and the average water temperature by acquiring the water temperatures of the water inlets of the water using devices and calculating the average water temperature;
when the difference value between the water temperature of the water inlet of each water-using device and the average water temperature is within a preset threshold value, controlling the circulating pump to work, and recording the time when the water temperature of the water inlet of each water-using device reaches a second preset water temperature so as to determine the distance between each water-using device and the water outlet of the circulating pump;
and when the difference value between the water temperature of the water inlet of each water using device and the average water temperature is not within the preset threshold value, closing the circulating pump until the difference value between the water temperature of the water inlet of each water using device and the average water temperature is within the preset threshold value.
4. The zero-cold water supply system according to claim 2, wherein the controller comprises a plurality of control modules, and the signal end of each control module is respectively connected with the signal end of the corresponding temperature detector one by one.
5. The zero-cold-water supply system of claim 4, wherein each control module is further connected with a terminal device and displays the distance between a plurality of water-using devices and the water outlet of the circulating pump for a user to name and select.
6. The zero-cold water supply system according to claim 1, further comprising a plurality of three-way valves sequentially disposed on the hot water pipe, wherein one outlet of the three-way valves is connected to an inlet of the water using equipment, and the other outlet of the three-way valves is connected to an inlet of an adjacent three-way valve or an inlet of the water using equipment, and the inlet of the three-way valves is connected to an outlet of an adjacent three-way valve or an outlet of the circulation pump.
7. A zero-cold water supply system according to claim 6, wherein said temperature detectors are respectively provided on said three-way valves in sequence.
8. The zero-cold-water supply system according to claim 7, wherein the temperature detector comprises a temperature probe, a temperature detection circuit, a power module and a first main control chip, and the temperature probe is arranged on the three-way valve;
the power output end of the power module, the power end of the temperature detection circuit and the power end of the first main control chip are interconnected, the signal input end of the temperature detection circuit is connected with the signal end of the temperature probe, the signal output end of the temperature detection circuit is connected with the first signal end of the first main control chip, and the signal end of the first main control chip is connected with the signal end of the relay controller;
the temperature detection circuit and the temperature probe are used for detecting the water temperature of the three-way valve and outputting a water temperature detection signal to the first main control chip;
the first main control chip is used for carrying out temperature acquisition or standby according to the control signal of the controller and outputting the water temperature detection signal to the controller during temperature acquisition.
9. The zero-cold-water supply system of claim 8, wherein the control module comprises a switching power supply module, a display screen, a key circuit and a second main control chip;
the power input end of the switch power supply module is connected with a mains supply, the power output end of the switch power supply module is connected with the power supply end of the second main control chip, the signal end of the display screen is connected with the first signal end of the second main control chip, the signal end of the key circuit is connected with the second signal end of the second main control chip, and the third signal end of the second main control chip is connected with the signal end of the first main control chip;
the switching power supply module is used for converting the voltage of the commercial power and outputting a direct-current power supply;
the key circuit is used for correspondingly outputting a trigger signal to the second main control chip according to a zero cold water selection instruction or a temperature regulation instruction of a user;
and the second main control chip is used for controlling the temperature detector and the circulating pump at corresponding positions to work according to the trigger signal and outputting a display signal to the display screen for water temperature display.
10. A control method of a zero-cold water supply system, characterized in that the zero-cold water supply system comprises:
a circulation pump;
the water inlet end of the hot water pipe is communicated with the water outlet of the circulating pump, and the water outlet end of the hot water pipe is communicated with the water inlets of the plurality of water-using devices;
one end of the cold water pipe is communicated with a water inlet of the circulating pump, and the other end of the cold water pipe is communicated with a water outlet end of the hot water pipe, so that the circulating pump, the hot water pipe and the cold water pipe form a circulating water path;
the temperature detectors are respectively arranged at water inlets of the water utilization equipment and are used for respectively detecting the water temperatures of the water inlets of the water utilization equipment;
the control method of the zero-cold water supply system comprises the following steps:
acquiring a zero cold water selection instruction of a user;
starting the circulating pump and the temperature detector at the corresponding position, and acquiring the water temperature at the water inlet of the water using equipment at the corresponding position;
and when the water temperature of the water inlet of the water using equipment at the corresponding position reaches a first preset water temperature, controlling the circulating pump and the temperature detector at the corresponding position to stop working.
11. The method of controlling a zero cold water supply system of claim 10, further comprising, before said step of obtaining a user zero cold water selection command:
acquiring a zero cold water initialization control instruction;
the method comprises the steps of obtaining the water temperatures of water inlets of a plurality of water using devices, and determining the distance between each water using device and a water outlet of a circulating pump according to the water temperatures of the water inlets of the plurality of water using devices, so that the water using devices at corresponding positions are identified.
12. The method of claim 10, wherein the step of obtaining the water temperatures at the inlets of the plurality of consumers and determining the distance between each consumer and the outlet of the circulation pump according to the water temperatures at the inlets of the plurality of consumers to identify the corresponding location of the temperature detector comprises:
acquiring water temperatures of water inlets of a plurality of water using devices, and calculating an average water temperature;
calculating the difference between the water temperature of the water inlet of each water using device and the average water temperature;
when the difference value between the water temperature of the water inlet of each water-using device and the average water temperature is within a preset threshold value, starting the circulating pump and the plurality of temperature detectors, and recording the time when the water temperature of the water inlet of each water-using device reaches a second preset water temperature so as to determine the distance between each water-using device and the water outlet of the circulating pump;
and when the difference value between the water temperature of the water inlet of each water using device and the average water temperature is not within the preset threshold value, closing the circulating pump and the plurality of temperature detectors until the difference value between the water temperature of the water inlet of each water using device and the average water temperature is within the preset threshold value.
13. A water heater, comprising:
a zero chilled water supply system as claimed in any one of claims 1 to 9;
memory, processor and a control program of a zero cold water supply system stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method of controlling a zero cold water supply system according to any one of claims 10 to 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910669290.1A CN112254349A (en) | 2019-07-22 | 2019-07-22 | Zero-cold-water supply system, control method of zero-cold-water supply system and water heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910669290.1A CN112254349A (en) | 2019-07-22 | 2019-07-22 | Zero-cold-water supply system, control method of zero-cold-water supply system and water heater |
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| CN112254349A true CN112254349A (en) | 2021-01-22 |
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| CN201910669290.1A Withdrawn CN112254349A (en) | 2019-07-22 | 2019-07-22 | Zero-cold-water supply system, control method of zero-cold-water supply system and water heater |
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| CN113175756A (en) * | 2021-05-25 | 2021-07-27 | 华帝股份有限公司 | Water temperature detection method and equipment |
| CN113310220A (en) * | 2021-06-02 | 2021-08-27 | 常州工业职业技术学院 | Zero-cold-water control system, control method and readable storage medium |
| CN113915775A (en) * | 2021-10-19 | 2022-01-11 | 珠海格力电器股份有限公司 | Method and equipment for remotely adjusting water temperature of water heater |
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