CN112146287B - Water heater, thermostatic valve control method thereof and thermostatic valve device - Google Patents
Water heater, thermostatic valve control method thereof and thermostatic valve device Download PDFInfo
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- CN112146287B CN112146287B CN202011033723.3A CN202011033723A CN112146287B CN 112146287 B CN112146287 B CN 112146287B CN 202011033723 A CN202011033723 A CN 202011033723A CN 112146287 B CN112146287 B CN 112146287B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention discloses a water heater, a thermostatic valve control method thereof and a thermostatic valve device, wherein the control method controls the running of a stepping motor by comparing the outlet water temperature with the target temperature, records the current real-time position of the stepping motor to a position recording variable and covers when the outlet water temperature reaches the target temperature, and controls the initial position of the stepping motor according to the position recording variable when the water heater is started next time. This technical scheme only needs can realize the control function of thermostatic valve through the play water temperature that detects the water heater, compares with current thermostatic valve control scheme, and is with low costs and logic control is simple.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a water heater, a thermostatic valve control method thereof and a thermostatic valve device.
Background
Constant temperature valves are installed on the existing water heaters and are used for controlling the mixing proportion of cold water and hot water. What install on traditional water heater is mechanical type thermostatic valve, utilizes mechanical type thermostatic valve to realize the play water constant temperature function defect of water heater and lies in unable in time coping with external environment's change, and reaction rate is full, and the condition of high temperature scald appears easily in the in-process of adjusting the temperature.
The other type of water heater adopts an intelligent thermostatic valve, can effectively overcome the defects of a mechanical thermostatic valve, but the thermostatic valve needs to be provided with various sensors to detect parameters such as water inlet temperature, liner temperature, water outlet temperature, water flow signals and the like, and the thermostatic valve has high cost and complex control logic.
Disclosure of Invention
The present invention is directed to a water heater, a method for controlling a thermostatic valve thereof, and a thermostatic valve device thereof, which are used to solve one or more technical problems in the prior art and provide at least one of a useful choice and a useful condition.
The technical scheme adopted for solving the technical problems is as follows:
a thermostatic valve control method of a water heater, the thermostatic valve being driven by a stepping motor, the thermostatic valve control method comprising the steps of:
step 100, setting a target temperature, a temperature allowance and a position recording variable;
step 200, controlling the initial position of the stepping motor according to the position recording variable;
step 300, detecting the temperature of water in real time;
step 400, performing difference operation on the outlet water temperature and the target temperature;
step 500, comparing a result obtained by performing difference operation on the outlet water temperature and the target temperature with the temperature allowance;
step 600, if the result is larger than the temperature margin, controlling a stepping motor to act to adjust the outlet water temperature, enabling the outlet water temperature to be close to the target temperature, returning to the step 300, otherwise, continuing to execute the next step;
step 700, detecting the real-time position of the stepping motor, recording the real-time position as a first position parameter, and recording the first position parameter to the position recording variable and covering the position recording variable;
and step 800, stopping water supply of the water heater, and returning to the step 100.
As a further improvement of the above technical solution, the step 100 further includes setting a time threshold, where two position recording variables are set, and are respectively defined as a first position recording variable and a second position recording variable;
in step 700, recording the first location parameter to the first location recording variable and overwriting the first location parameter;
step 800, after the water heater stops using water, starting timing, calculating water use stopping time, detecting the real-time position of the stepping motor before the water heater stops using water, recording the real-time position as a second position parameter, and recording the second position parameter to the second position recording variable and covering the second position parameter;
in the step 200, the water use stopping time is compared with the time threshold, if the water use stopping time is greater than the time threshold, the initial position of the stepping motor is controlled according to the first position recording variable, otherwise, the initial position of the stepping motor is controlled according to the second position recording variable.
As a further improvement of the above technical solution, the step 100 further includes setting a water flow threshold, and the step 200 and the step 300 further include:
step A, collecting real-time water flow, comparing the real-time water flow with the water flow threshold value, and executing the step 300 if the real-time water flow reaches the water flow threshold value.
The invention also discloses a thermostatic valve device of the water heater, which comprises a cold water pipeline, a hot water pipeline and a water mixing pipeline, wherein one end of the water mixing pipeline is connected with the cold water pipeline, the other end of the water mixing pipeline is connected with the hot water pipeline, and the water mixing pipeline is provided with a valve core for controlling the mixing proportion of cold water and hot water and a stepping motor for controlling the action of the valve core;
the thermostatic valve device also comprises a flow sensor, a temperature sensor and a controller, wherein the temperature sensor is used for detecting the outlet water temperature of the water heater, the flow sensor is used for acquiring the real-time water flow of the water heater, and the temperature sensor, the flow sensor and the stepping motor are respectively connected with the controller;
the controller is configured for performing the above-described thermostatic valve control method.
The invention also discloses a water heater, which comprises a heating inner container, a water inlet pipeline, a water outlet pipeline and the thermostatic valve device, wherein one end of the water inlet pipeline is connected with the heating inner container, the other end of the water inlet pipeline is connected with a cold water pipeline of the thermostatic valve device, one end of the water outlet pipeline is connected with the heating inner container, and the other end of the water outlet pipeline is connected with a hot water pipeline of the thermostatic valve device.
The invention has the beneficial effects that: according to the technical scheme, the operation of the stepping motor is controlled by comparing the outlet water temperature with the target temperature, when the outlet water temperature reaches the target temperature, the current real-time position of the stepping motor is recorded to the position recording variable and covered, and when the water heater is started next time, the initial position of the stepping motor is controlled according to the position recording variable. This technical scheme only needs can realize the control function of thermostatic valve through the play water temperature that detects the water heater, compares with current thermostatic valve control scheme, and is with low costs and logic control is simple.
Drawings
The invention is further described with reference to the accompanying drawings and examples;
FIG. 1 is a flow chart of the control method of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, the present application discloses a thermostatic valve control method of a water heater, the thermostatic valve being driven by a stepping motor, a first embodiment of the thermostatic valve control method including the steps of:
step 100, setting a target temperature, a temperature allowance and a position recording variable;
step 200, controlling the initial position of the stepping motor according to the position recording variable;
step 300, detecting the temperature of water in real time;
step 400, performing difference operation on the outlet water temperature and the target temperature;
step 500, comparing a result obtained by performing difference operation on the outlet water temperature and the target temperature with the temperature allowance;
step 600, if the result is larger than the temperature margin, controlling a stepping motor to act to adjust the outlet water temperature, enabling the outlet water temperature to be close to the target temperature, returning to the step 300, otherwise, continuing to execute the next step;
step 700, detecting the real-time position of the stepping motor, recording the real-time position as a first position parameter, and recording the first position parameter to the position recording variable and covering the position recording variable;
and step 800, stopping water supply of the water heater, and returning to the step 100.
It should be noted that, in the present embodiment, the step 500 is to compare an absolute value of a result obtained by performing a difference operation on the outlet water temperature and the target temperature with the temperature margin, the step 500 is to calculate a degree of deviation of the outlet water temperature from the target temperature, and in the step 600, when the outlet water temperature deviates from the target temperature, the mixing ratio of the cold water and the hot water needs to be adjusted by the stepping motor so that the outlet water temperature approaches the target temperature. When the water outlet temperature is close to the target temperature, the water outlet temperature reaches the requirement of a user, the constant-temperature water outlet function can be realized by keeping the position of the stepping motor unchanged, simultaneously recording the current real-time position of the stepping motor to the position recording variable and covering, controlling the initial position of the stepping motor according to the position recording variable when the water consumption of the next time is finished, considering the adjacent water consumption of two times, possibly causing the change of the water inlet temperature of the water heater due to the change of the ambient temperature, recording the real-time position of the stepping motor after the water outlet temperature reaches the requirement when the water consumption of each time is required to keep the water outlet temperature constant, recording the real-time position to the position recording variable and covering, and recording the variable according to the position when the water consumption of the next time is finished, and controlling the initial position of the stepping motor, so that the water outlet temperature can reach the target temperature quickly.
In addition, in consideration of the operating principle of the stepping motor, the present embodiment specifically identifies the real-time position of the stepping motor according to the number of pulse signals output to the stepping motor.
From the analysis above, it can be seen that the control function of the thermostatic valve can be realized only by detecting the outlet water temperature of the water heater in the embodiment, and compared with the existing thermostatic valve control scheme, the control method is low in cost and simple in logic control.
It should be noted that, when the water heater of this embodiment uses water for the first time, since there is no data of the position recording variable, the step 200 does not need to be executed, or the position recording variable is initialized in the step 100, and then the step 200 is executed according to the initialized position recording variable.
Further preferably, in this embodiment, the step 100 further includes setting a water flow threshold, and the step 200 and the step 300 further include:
step A, collecting real-time water flow, comparing the real-time water flow with the water flow threshold value, and executing the step 300 if the real-time water flow reaches the water flow threshold value.
A second embodiment of the thermostatic valve control method according to the present application differs from the first embodiment in that the step 100 further comprises setting a time threshold, two of the position recording variables being defined as a first position recording variable and a second position recording variable, respectively;
in step 700, recording the first location parameter to the first location recording variable and overwriting the first location parameter;
step 800, after the water heater stops using water, starting timing, calculating water use stopping time, detecting the real-time position of the stepping motor before the water heater stops using water, recording the real-time position as a second position parameter, and recording the second position parameter to the second position recording variable and covering the second position parameter;
in the step 200, the water use stopping time is compared with the time threshold, if the water use stopping time is greater than the time threshold, the initial position of the stepping motor is controlled according to the first position recording variable, otherwise, the initial position of the stepping motor is controlled according to the second position recording variable.
The first embodiment of the thermostatic valve control method is mainly used for solving the problem of ideal water consumption, namely that the hot water in the heating inner container of the water heater is sufficient and can meet the consumption in the water consumption process, the water outlet temperature can be kept constant in the whole water consumption process, and meanwhile, the interval time between two adjacent water consumptions is long enough and the hot water in the heating inner container of the water heater can be ensured to be replenished completely.
However, considering that the actual water consumption may be too long, the time interval between two adjacent water consumption is insufficient, and the like, the second embodiment of the thermostatic valve control method according to the present application mainly solves the above problems occurring in the actual water consumption process. During the previous water use, when the water outlet temperature reaches the target temperature, recording the current real-time position (namely, a first position parameter) of the stepping motor to the first position recording variable and covering the first position recording variable, when the water use time is too long to maintain the constant water outlet temperature, performing a series of control (the control step is not limited), and finally when the water use is finished, the real-time position of the stepping motor is different from the first position parameter, and recording the real-time position (namely, a second position parameter) of the stepping motor before the water heater stops using the water to the second position recording variable and covering the second position recording variable. When the next time of water consumption is needed, firstly calculating the interval time between two adjacent times of water consumption, namely calculating the water consumption stopping time, when the water consumption stopping time is longer than the time threshold, the time interval between two adjacent water consumptions is proved to be long enough, enough hot water exists in the heating liner of the water heater to meet the requirement, the water outlet temperature can reach the target temperature, at the moment, the initial position of the stepping motor is controlled according to the first position recording variable, when the water consumption stopping time is less than the time threshold, the fact that the interval time between two adjacent water consumption times is short, the amount of hot water in a heating inner container of the water heater is insufficient, and it is difficult to ensure that the outlet water temperature reaches the target temperature is proved, at the moment, the initial position of the stepping motor is controlled according to the second position recording variable, and the outlet water temperature can be ensured to reach a proper value as soon as possible.
It should be noted that, when the water heater of this embodiment uses water for the first time, since there is no data of the stop water time, the first position recording variable and the second position recording variable, the step 200 does not need to be executed, or the stop water time, the first position recording variable and the second position recording variable are initialized in the step 100, and then the step 200 is executed according to the initialized stop water time, the first position recording variable and the second position recording variable.
The application also discloses a thermostatic valve device of the water heater, and a first embodiment of the thermostatic valve device comprises a cold water pipeline, a hot water pipeline and a water mixing pipeline, wherein one end of the water mixing pipeline is connected with the cold water pipeline, the other end of the water mixing pipeline is connected with the hot water pipeline, and the water mixing pipeline is provided with a valve core for controlling the mixing proportion of cold water and hot water and a stepping motor for controlling the action of the valve core;
the thermostatic valve device also comprises a flow sensor, a temperature sensor and a controller, wherein the temperature sensor is used for detecting the outlet water temperature of the water heater, the flow sensor is used for acquiring the real-time water flow of the water heater, and the temperature sensor, the flow sensor and the stepping motor are respectively connected with the controller;
the controller is configured for executing the first embodiment of the thermostatic valve control method described above.
The invention also discloses a water heater, which comprises a heating inner container, a water inlet pipeline, a water outlet pipeline and the first embodiment of the thermostatic valve device, wherein one end of the water inlet pipeline is connected with the heating inner container, the other end of the water inlet pipeline is connected with a cold water pipeline of the thermostatic valve device, one end of the water outlet pipeline is connected with the heating inner container, and the other end of the water outlet pipeline is connected with a hot water pipeline of the thermostatic valve device.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (4)
1. A thermostatic valve control method of a water heater is characterized by comprising the following steps: the thermostatic valve is driven by a stepping motor, and the thermostatic valve control method comprises the following steps:
step 100, setting a target temperature, a temperature allowance and a position recording variable;
step 200, controlling the initial position of the stepping motor according to the position recording variable;
step 300, detecting the temperature of water in real time;
step 400, performing difference operation on the outlet water temperature and the target temperature;
step 500, comparing a result obtained by performing difference operation on the outlet water temperature and the target temperature with the temperature allowance;
step 600, if the result is larger than the temperature margin, controlling a stepping motor to act to adjust the outlet water temperature, enabling the outlet water temperature to be close to the target temperature, returning to the step 300, otherwise, continuing to execute the next step;
step 700, detecting the real-time position of the stepping motor, recording the real-time position as a first position parameter, and recording the first position parameter to the position recording variable and covering the position recording variable;
step 800, stopping water supply of the water heater, and returning to the step 100;
the step 100 further includes setting a time threshold, where two position recording variables are set, and are respectively defined as a first position recording variable and a second position recording variable;
in step 700, recording the first location parameter to the first location recording variable and overwriting the first location parameter;
step 800, after the water heater stops using water, starting timing, calculating water use stopping time, detecting the real-time position of the stepping motor before the water heater stops using water, recording the real-time position as a second position parameter, and recording the second position parameter to the second position recording variable and covering the second position parameter;
in the step 200, the water use stopping time is compared with the time threshold, if the water use stopping time is greater than the time threshold, the initial position of the stepping motor is controlled according to the first position recording variable, otherwise, the initial position of the stepping motor is controlled according to the second position recording variable.
2. The thermostatic valve control method of a water heater according to claim 1, characterized in that: the step 100 further includes setting a water flow threshold, and between the step 200 and the step 300, further includes:
step A, collecting real-time water flow, comparing the real-time water flow with the water flow threshold value, and executing the step 300 if the real-time water flow reaches the water flow threshold value.
3. A thermostatic valve device of a water heater is characterized in that: the water mixing device comprises a cold water pipeline, a hot water pipeline and a water mixing pipeline, wherein one end of the water mixing pipeline is connected with the cold water pipeline, the other end of the water mixing pipeline is connected with the hot water pipeline, and a valve core for controlling the mixing proportion of cold water and hot water and a stepping motor for controlling the action of the valve core are arranged on the water mixing pipeline;
the thermostatic valve device also comprises a flow sensor, a temperature sensor and a controller, wherein the temperature sensor is used for detecting the outlet water temperature of the water heater, the flow sensor is used for acquiring the real-time water flow of the water heater, and the temperature sensor, the flow sensor and the stepping motor are respectively connected with the controller;
the controller is configured for performing the thermostatic valve control method of claim 1 or 2.
4. A water heater, characterized in that: the thermostatic valve device comprises a heating inner container, a water inlet pipeline, a water outlet pipeline and the thermostatic valve device of claim 3, wherein one end of the water inlet pipeline is connected with the heating inner container, the other end of the water inlet pipeline is connected with a cold water pipeline of the thermostatic valve device, one end of the water outlet pipeline is connected with the heating inner container, and the other end of the water outlet pipeline is connected with a hot water pipeline of the thermostatic valve device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011033723.3A CN112146287B (en) | 2020-09-27 | 2020-09-27 | Water heater, thermostatic valve control method thereof and thermostatic valve device |
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| CN202011033723.3A CN112146287B (en) | 2020-09-27 | 2020-09-27 | Water heater, thermostatic valve control method thereof and thermostatic valve device |
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| CN112146287A CN112146287A (en) | 2020-12-29 |
| CN112146287B true CN112146287B (en) | 2021-09-14 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105202764B (en) * | 2014-06-24 | 2018-02-13 | Tcl空调器(中山)有限公司 | The control method of outlet water temperature of water heater |
| CN104949325B (en) * | 2015-07-20 | 2017-10-13 | 潘兆铿 | With the small-sized storage water heater thermostatic electric water heater of water terminal |
| CN206145959U (en) * | 2016-08-30 | 2017-05-03 | 青岛经济技术开发区海尔热水器有限公司 | Electronic constant temperature type electric water heater |
| CN109114819A (en) * | 2018-07-27 | 2019-01-01 | 广东万家乐燃气具有限公司 | A kind of gas heater self study intelligent constant-temperature control method |
| CN110985703A (en) * | 2019-12-02 | 2020-04-10 | 广东万家乐燃气具有限公司 | Thermostatic valve and independent thermostatic control system |
| CN111520805B (en) * | 2020-04-30 | 2021-05-07 | 广东万和热能科技有限公司 | Control method of hot water system based on water quantity, frequency and time |
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