CN106871458B - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN106871458B CN106871458B CN201710139540.1A CN201710139540A CN106871458B CN 106871458 B CN106871458 B CN 106871458B CN 201710139540 A CN201710139540 A CN 201710139540A CN 106871458 B CN106871458 B CN 106871458B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Abstract
The invention discloses a water heater and a control method thereof, wherein the control method of the water heater comprises the following steps: receiving a timed cruise instruction; acquiring the preheating working period of the water heater according to the timed cruise instruction; and heating the water temperature in a hot water pipe of the water heater to a preset water temperature before the preheating working period. According to the technical scheme, water in the hot water pipe of the water heater is heated before water is used by a user (before the preheating working period), so that the user can use hot water at any time in the preheating working period.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a water heater and a control method thereof.
Background
Along with the improvement of living standard of people, people have higher and higher requirements on water heaters. When the gas water heater is just used, cold water can be discharged for a period of time, so that the use of a user is not facilitated. In order to meet the demand of people, before a user uses water, the water in a hot water pipe of the gas water heater is heated, so that the user can use the hot water immediately. However, when the water in the hot water pipe is heated, the phenomenon that no one is used after the water is heated is avoided while the situation that a user can use the hot water according to needs is ensured.
Disclosure of Invention
The invention mainly aims to provide a water heater, which aims to ensure that a user can use hot water at any time and improve the utilization rate of the hot water.
In order to achieve the purpose, the control method of the water heater provided by the invention comprises the following steps:
receiving a timed cruise instruction;
acquiring the preheating working period of the water heater according to the timed cruise instruction;
and heating the water temperature in a hot water pipe of the water heater to a preset water temperature before the preheating working period.
Preferably, the step of heating the water temperature in the hot water pipe of the water heater to a preset water temperature before the preheating operation period comprises:
detecting the temperature of cold water in a cold water pipe;
calculating target heating power of a heating device of the water heater according to the cold water temperature and a preset water temperature;
closing a water inlet valve of the water heater to enable a cold water pipe, a hot water pipe, a heating pipe and a driving pipe of the water heater to form a closed circulation pipeline;
and starting a water pump arranged on the driving pipe, sending cold water in the cold water pipe to the heating pipe after passing through the driving pipe, heating water in the heating pipe by the heating device with target heating power, and enabling hot water heated to a preset water temperature to flow into the hot water pipe.
Preferably, before the detecting the temperature of the cold water in the cold water pipe, the method further comprises the following steps:
acquiring the capacity of a hot water pipe and the preset power of a water pump;
calculating the filling time required by filling the hot water pipe with hot water according to the capacity of the hot water pipe and the preset power of the water pump;
and calculating the time for starting the water pump and the heating device according to the filling time and the preheating working period.
Preferably, after the step of turning on the water pump disposed on the driving pipe, sending the cold water in the cold water pipe to the heating pipe after passing through the driving pipe, heating the water in the heating pipe by the heating device with the target heating power, and flowing the hot water heated to the preset water temperature into the hot water pipe, the method further comprises:
acquiring the terminal water temperature of a hot water inlet of a sprinkler of a water heater;
and when the terminal water temperature is greater than or equal to the preset water temperature, the water pump and the heating assembly are turned off.
Preferably, after the step of heating the water temperature in the hot water pipe of the water heater to the preset water temperature before the preheating working period, the method further comprises the following steps:
in the preheating working period, acquiring the current water temperature in the hot water pipe;
and when the current water temperature is less than or equal to the preset lowest water temperature, heating the water in the hot water pipe to the preset water temperature.
The invention further proposes a water heater comprising:
the receiving module is used for receiving a timed cruise instruction;
the timing module is used for acquiring the preheating working period of the water heater according to the timing cruise instruction;
and the heating module is used for heating the water temperature in the hot water pipe of the water heater to a preset water temperature before the preheating working period.
Preferably, the heating module comprises:
the detection unit is used for detecting the temperature of cold water in the cold water pipe;
the first calculating unit is used for calculating the target heating power of a heating device of the water heater according to the cold water temperature and the preset water temperature;
the closing unit is used for closing a water inlet valve of the water heater so that a cold water pipe, a hot water pipe, a heating pipe and a driving pipe of the water heater form a closed circulation pipeline;
and the heating unit is used for starting a water pump arranged on the driving pipe, sending cold water in the cold water pipe to the heating pipe after passing through the driving pipe, heating water in the heating pipe by the heating device with target heating power, and enabling hot water heated to a preset water temperature to flow into the hot water pipe.
Preferably, the heating module further comprises:
the first acquisition unit is used for acquiring the capacity of the hot water pipe and the preset power of the water pump;
the second calculating unit is used for calculating the filling time required by the hot water to fill the hot water pipe according to the capacity of the hot water pipe and the preset power of the water pump;
and the third calculating unit is used for calculating the time for starting the water pump and the heating device according to the filling time and the preheating working period.
Preferably, the heating module further comprises:
the second acquisition unit is used for acquiring the terminal water temperature of a hot water inlet of the water heater sprinkler;
and the stopping unit is used for turning off the water pump and the heating assembly when the terminal water temperature is greater than or equal to the preset water temperature.
Preferably, the water heater further comprises:
the detection module is used for acquiring the current water temperature in the hot water pipe in the preheating working period;
and the heat preservation module is used for heating the water in the hot water pipe to the preset water temperature when the current water temperature is less than or equal to the preset lowest water temperature.
According to the technical scheme, the timing cruise instruction set by the user is obtained, the water using time period of the user is determined according to the timing cruise instruction, the preheating working time period of the water heater is determined, water in the hot water pipe of the water heater is heated before the water is used by the user (before the preheating working time period), so that the user can use hot water at any time in the preheating working time period, meanwhile, the user can use the hot water at any time only in the preheating working time period, the phenomenon that the water in the hot water pipe is heated for a long time is avoided, the waste of the hot water is avoided, and the utilization rate of the hot water is improved.
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 diagram of a water heater according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a control method of a water heater according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating another embodiment of a method for controlling a water heater according to the present invention;
FIG. 4 is a schematic block diagram of a water heater according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a module of a water heater according to another embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
200 | |
| 210 | |
300 | |
| 310 | One- |
400 | |
| 410 | |
500 | |
| 600 | |
700 | |
| 710 | |
720 | |
| 730 | Shower head water valve |
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 all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related 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, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the present invention, the water heater takes a gas water heater as an example, first obtains a water using time period set by a user, heats water in the hot water pipe 600 before the water using time period, and keeps the water in the hot water pipe 600 as hot water throughout the water using time period. There are many ways to heat the water in the hot water pipe 600, and an electric auxiliary heating device can be arranged for heating; the internal circulation water path of the water heater can be established first and then driven by the water pump 410, so that the circulation flow of the internal water path of the water heater can be realized, and the water in the circulation water path can be heated in the water flowing process.
The specific process of operation of the water heater is described below.
Referring to fig. 1 to 3, in an embodiment of the present invention,
a control method of a water heater, comprising the steps of:
s10, receiving a timed cruise instruction;
the mode for receiving the timed cruise command is various, for example, the timed cruise command is set through a timing component arranged on the shell of the water heater, and the timed cruise command can also be set through a mobile terminal which is in communication connection with the water heater. Taking the cruise instruction sent by the mobile terminal as an example, the communication connection between the mobile terminal and the water heater can be established through a home local area network, or through an external communication network such as 2G, 3G, 4G, and the like.
S20, acquiring the preheating working period of the water heater according to the timed cruise instruction;
the timed cruise instruction comprises a preheating working period, the preheating working period is a period of time when the user needs to use water, and the water temperature in the hot water pipe 600 is required to reach a preset value in the user water using period. The preheating working time period of the water heater can be set by a user according to the requirement of the user, such as the water consumption peak time of 8: 00-9: 00, 19: 00-21: 00 and the like. The number of the preheating operation period may be one, or a plurality of the preheating operation periods may be provided at the same time. The preheating working period set according to the timed cruise instruction is a repeated heating period, namely, the preheating is carried out on time every day in the preheating working period (19: 00-21: 00). This can avoid repeated daily operations and ensure hot water use by the user.
And S30, heating the water temperature in the hot water pipe 600 of the water heater to a preset water temperature before the preheating working period.
Before the user uses water, the water in the hot water pipe 600 needs to be heated to a preset water temperature, so that the user can use the hot water at any time in the preheating working period. There are many ways to heat the water in the hot water pipe 600, and an electric auxiliary heating device can be added in the hot water pipe 600 or in the water circulation loop to directly heat the water in the hot water pipe 600; or a preheating circulation water path inside the water heater may be established first, and water in the hot water pipe 600 is heated to a preset water temperature by heating water flowing in the preheating circulation water path.
In this embodiment, through the timing instruction that cruises of acquireing the user setting, confirm user's water period according to the timing instruction of crusing, thereby confirm the preheating operation period of water heater, before user's water (before preheating operation period) with the water heating in the hot-water line 600 of water heater, make the user all can use hot water at any time in preheating operation period, and simultaneously, because only need guarantee the user can use hot water at any time in preheating the period, avoid heating hot-water line 600 normal water for a long time, thereby avoided the waste to hot water, thereby hot-water utilization ratio has been improved.
For a clearer description of the control method of the water heater, the following description is given of the pipelines of the water heater:
the pipeline of the water heater comprises a cold water pipe 100, a hot water pipe 600, a heating pipe 500 and a shunt pipe 300 which are connected in sequence, wherein one end of the shunt pipe 300, which is far away from the heating pipe 500, is communicated with the cold water pipe 100. The water heater pipeline further comprises a driving pipe 400 connected with the shunt pipe 300 in parallel, namely, one end of the driving pipe 400 and one end of the shunt pipe are both communicated with the heating pipe 500, and the other end of the driving pipe 400 and one end of the shunt pipe are both communicated with the cold water pipe 100. The inlet pipe of the water heater is communicated with the cold water pipe 100 and the shunt pipe 300, namely, cold water in the inlet pipe can simultaneously enter the shunt pipe 300 and the cold water pipe 100. An inlet valve 210, such as an electromagnetic control valve, is disposed on the inlet pipe. A check valve is provided at the bypass pipe 300 to prevent water in the hot water pipe 600 from flowing backward into the cold water pipe 100. The driving pipe 400 is provided with a water pump 410 and a check valve, the water pump 410 is used for driving cold water in the cold water pipe 100 to the heating pipe 500 for heating, and the check valve is used for preventing water from flowing from the heating pipe 500 to the cold water pipe 100. The heating element of the water heater is arranged corresponding to the heating pipe 500, and the heating pipe 500, the heating element and the water pump 410 are all arranged in the shell of the water heater. The shower head 700 is disposed at a junction of the hot water pipe 600 and the cold water pipe 100, and a check valve is disposed between a cold water inlet and a hot water inlet of the shower head 700 to prevent water in the cold water pipe 100 from entering the hot water pipe 600.
Under normal operation, a part of cold water in the water inlet pipe 200 of the water heater directly enters the cold water pipe 100, the cold water flows to the cold water inlet 720 of the shower head 700, a part of cold water enters the heating pipe 500 through the shunt pipe 300 for heating, and the heated hot water flows to the hot water inlet 710 of the shower head 700 through the hot water pipe 600.
In the preheating working period, before the user uses water, the water inlet valve 210 on the water inlet pipe is closed, so that the cold water pipe 100, the hot water pipe 600, the heating pipe 500 and the driving pipe 400 form a closed circulation water path. The heating device of the water heater is turned on, the water pump 410 is turned on, the cold water in the cold water pipe 100 flows to the heating pipe 500 under the action of the water pump 410, the heating device heats the cold water passing through the heating pipe 500, the heated hot water flows into the hot water pipe 600, and the cold water in the hot water pipe 600 flows into the cold water pipe 100 under the action of the water pump 410. When the hot water pipe 600 is filled with hot water, the water pump 410 and the heating device are turned off, and at this time (before the user uses water), the hot water inlet 710 of the shower head 700 is filled with hot water, and the cold water inlet 720 is still filled with cold water.
In order to heat the water in the hot water pipe 600 more rapidly, the step of heating the water temperature in the hot water pipe 600 of the water heater to a preset water temperature before the preheating operation period includes:
s31, detecting the temperature of cold water in the cold water pipe 100;
the temperature of the cold water in the cold water pipe 100 is detected in many ways, and the detection by a temperature sensor is taken as an example.
S32, calculating the target heating power of the heating device of the water heater according to the cold water temperature and the preset water temperature;
in order to heat cold water to hot water having a preset water temperature, the cold water needs to be heated, and the heating power is in positive correlation with the temperature difference between the preset water temperature and the cold water temperature, that is, the larger the temperature difference is, the larger the target heating power needs to be set. Of course, the specific heat capacity of water also needs to be considered in the calculation and setting process. The gears of the water heater heating device can be divided into a high gear, a medium gear and a low gear, each gear corresponds to different temperature difference working conditions, and the larger the temperature difference is, the higher the corresponding gear is.
S33, closing the water inlet valve 210 of the water heater, so that the cold water pipe 100, the hot water pipe 600, the heating pipe 500 and the driving pipe 400 of the water heater form a closed circulation pipeline;
the control valves of the water inlet valve 210 and the shunt pipe 300 of the water heater are closed, so that the cold water pipe 100, the hot water pipe 600, the heating pipe 500 and the driving pipe 400 form a closed circulation pipeline, and necessary conditions are provided for water circulation heating.
S34, the water pump 410 disposed on the driving pipe 400 is turned on, the cold water in the cold water pipe 100 is sent to the heating pipe 500 through the driving pipe 400, the heating device heats the water in the heating pipe 500 with the target heating power, and the hot water heated to the preset water temperature flows into the hot water pipe 600.
In this embodiment, through detecting cold water temperature to set up heating device's heating power according to cold water temperature, target temperature, in order to guarantee that the user can use required hot water, thereby satisfy user's demand.
In order to make the user use the hot water more timely, the method further comprises the following steps before the step of detecting the temperature of the cold water in the cold water pipe 100:
s35, acquiring the capacity of the hot water pipe 600 and the preset power of the water pump 410; there are various ways to obtain the volume of the hot water pipe 600, and before the hot water pipe 600 is assembled, the volume of the hot water pipe 600 is detected, or it can be calculated according to the length and diameter of the pipe, or obtained from the storage device of the water heater. The power of the water pump 410 may be set by a user or may be a default setting.
S36, calculating a filling time required for hot water to fill the hot water pipe 600 according to the capacity of the hot water pipe 600 and the preset power of the water pump 410; the time period for filling the hot water pipe 600 is a ratio of the capacity of the hot water pipe 600 to the power of the water pump 410, i.e., the time period for filling the hot water pipe 600 is inversely proportional to the capacity and directly proportional to the power of the water pump 410.
S37, the time when the water pump 410 and the heating device are turned on is calculated according to the filling time period and the preheating operation period.
Taking the preheating working time period of 20: 00-21: 00 as an example, and taking the filling time period of 2 minutes as an example, the latest time for turning on the water pump 410 and the heating device is 2 minutes before 20:00, namely 19: 58.
For example, to further save energy and avoid heating redundant hot water, after the step of turning on the water pump 410 disposed on the driving pipe 400, sending the cold water in the cold water pipe 100 to the heating pipe 500 through the driving pipe 400, the heating device heating the water in the heating pipe 500 with the target heating power, and the hot water heated to the preset water temperature flowing into the hot water pipe 600, the method further includes:
acquiring the terminal water temperature of a hot water inlet 710 of a water heater sprinkler 700;
in this embodiment, a temperature sensor is disposed at a hot water inlet 710 of the shower head 700 to detect a temperature of hot water entering the shower head 700.
And turning off the water pump 410 and the heating assembly when the terminal water temperature is greater than or equal to a preset water temperature.
When the temperature of the water at the hot water inlet 710 is greater than or equal to the preset temperature, it is indicated that the whole hot water pipe 600 is filled with hot water (since the shower head 700 is disposed at the junction of the cold water pipe 100 and the hot water pipe 600, the hot water inlet 710 of the shower head 700 is the extreme end of the hot water pipe 600, and when the extreme water temperature meets the requirement of the preset temperature, the temperature of the water in the whole hot water pipe 600 should meet the preset temperature). At this time, the water pump 410 and the heating device may be turned off, of course. So set up to make heating device and water pump 410's operating time more accurate, avoid heating device and water pump 410 to work overlength's time to make the energy obtain more reasonable utilization.
In order to maintain the temperature of the water in the hot water pipe 600 during the preheating operation period, the step of heating the temperature of the water in the hot water pipe 600 of the water heater to a preset temperature before the preheating operation period further comprises:
in the preheating working period, the current water temperature in the hot water pipe 600 is obtained;
a temperature sensor is arranged in the hot water pipe 600, and the temperature of the hot water in the hot water pipe 600 is detected in real time in a preheating working period.
When the current water temperature is less than or equal to the preset minimum water temperature, the water in the hot water pipe 600 is heated to the preset water temperature.
The water heater is preset with a water temperature range in the hot water pipe 600, that is, when the detected current water temperature is in the water temperature range, the heating device does not work, and when the current water temperature is lower than the lowest value of the water temperature range, the water inlet valve 210 is closed, the heating device and the water pump 410 are opened, and the hot water in the hot water pipe 600 is heated.
Referring to fig. 1, 4 and 5, the present invention further provides a water heater, comprising the following steps:
the receiving module 10 is used for receiving a timed cruise instruction;
the mode for receiving the timed cruise command is various, for example, the timed cruise command is set through a timing component arranged on the shell of the water heater, and the timed cruise command can also be set through a mobile terminal which is in communication connection with the water heater. Taking the cruise instruction sent by the mobile terminal as an example, the communication connection between the mobile terminal and the water heater can be established through a home local area network, or through an external communication network such as 2G, 3G, 4G, and the like.
The timing module 20 is used for acquiring the preheating working period of the water heater according to the timing cruise instruction;
the timed cruise instruction comprises a preheating working period, the preheating working period is a period of time when the user needs to use water, and the water temperature in the hot water pipe 600 is required to reach a preset value in the user water using period. The preheating working time period of the water heater can be set by a user according to the requirement of the user, such as the water consumption peak time of 8: 00-9: 00, 19: 00-21: 00 and the like. The number of the preheating operation period may be one, or a plurality of the preheating operation periods may be provided at the same time.
And the heating module 30 is used for heating the water temperature in the hot water pipe 600 of the water heater to a preset water temperature before the preheating working period.
Before the user uses water, the water in the hot water pipe 600 needs to be heated to a preset water temperature, so that the user can use the hot water at any time in the preheating working period. There are many ways to heat the water in the hot water pipe 600, and an electric auxiliary heating device can be added in the hot water pipe 600 or in the water circulation loop to directly heat the water in the hot water pipe 600; or a preheating circulation water path inside the water heater may be established first, and water in the hot water pipe 600 is heated to a preset water temperature by heating water flowing in the preheating circulation water path.
In this embodiment, through the timing instruction that cruises of acquireing the user setting, confirm user's water period according to the timing instruction of crusing, thereby confirm the preheating operation period of water heater, before user's water (before preheating operation period) with the water heating in the hot-water line 600 of water heater, make the user all can use hot water at any time in preheating operation period, and simultaneously, because only need guarantee the user can use hot water at any time in preheating the period, avoid heating hot-water line 600 normal water for a long time, thereby avoided the waste to hot water, thereby hot-water utilization ratio has been improved.
For a clearer description of the control method of the water heater, the following description is given of the pipelines of the water heater:
the pipeline of the water heater comprises a cold water pipe 100, a hot water pipe 600, a heating pipe 500 and a shunt pipe 300 which are connected in sequence, wherein one end of the shunt pipe 300, which is far away from the heating pipe 500, is communicated with the cold water pipe 100. The water heater pipeline further comprises a driving pipe 400 connected with the shunt pipe 300 in parallel, namely, one end of the driving pipe 400 and one end of the shunt pipe are both communicated with the heating pipe 500, and the other end of the driving pipe 400 and one end of the shunt pipe are both communicated with the cold water pipe 100. The inlet pipe of the water heater is communicated with the cold water pipe 100 and the shunt pipe 300, namely, cold water in the inlet pipe can simultaneously enter the shunt pipe 300 and the cold water pipe 100. An inlet valve 210, such as an electromagnetic control valve, is disposed on the inlet pipe. A check valve is provided at the bypass pipe 300 to prevent water in the hot water pipe 600 from flowing backward into the cold water pipe 100. The driving pipe 400 is provided with a water pump 410 and a check valve, the water pump 410 is used for driving cold water in the cold water pipe 100 to the heating pipe 500 for heating, and the check valve is used for preventing water from flowing from the heating pipe 500 to the cold water pipe 100. The heating element of the water heater is arranged corresponding to the heating pipe 500, and the heating pipe 500, the heating element and the water pump 410 are all arranged in the shell of the water heater. The shower head 700 is disposed at a junction of the hot water pipe 600 and the cold water pipe 100, and a check valve is disposed between a cold water inlet and a hot water inlet of the shower head 700 to prevent water in the cold water pipe 100 from entering the hot water pipe 600.
Under normal operation, a part of cold water in the water inlet pipe 200 of the water heater directly enters the cold water pipe 100, the cold water flows to the cold water inlet 720 of the shower head 700, a part of cold water enters the heating pipe 500 through the shunt pipe 300 for heating, and the heated hot water flows to the hot water inlet 710 of the shower head 700 through the hot water pipe 600.
In the preheating working period, before the user uses water, the water inlet valve 210 on the water inlet pipe is closed, so that the cold water pipe 100, the hot water pipe 600, the heating pipe 500 and the driving pipe 400 form a closed circulation water path. The heating device of the water heater is turned on, the water pump 410 is turned on, the cold water in the cold water pipe 100 flows to the heating pipe 500 under the action of the water pump 410, the heating device heats the cold water passing through the heating pipe 500, the heated hot water flows into the hot water pipe 600, and the cold water in the hot water pipe 600 flows into the cold water pipe 100 under the action of the water pump 410. When the hot water pipe 600 is filled with hot water, the water pump 410 and the heating device are turned off, and at this time (before the user uses water), the hot water inlet 710 of the shower head 700 is filled with hot water, and the cold water inlet 720 is still filled with cold water.
For more rapidly heating the water in the hot water pipe 600, the heating module includes:
a detection unit 31 for detecting a temperature of cold water in the cold water pipe 100;
the temperature of the cold water in the cold water pipe 100 is detected in many ways, and the detection by a temperature sensor is taken as an example.
A first calculating unit 32 for calculating a target heating power of a heating device of the water heater according to the cold water temperature and a preset water temperature;
in order to heat cold water to hot water having a preset water temperature, the cold water needs to be heated, and the heating power is in positive correlation with the temperature difference between the preset water temperature and the cold water temperature, that is, the larger the temperature difference is, the larger the target heating power needs to be set. Of course, the specific heat capacity of water also needs to be considered in the calculation and setting process. The gears of the water heater heating device can be divided into a high gear, a medium gear and a low gear, each gear corresponds to different temperature difference working conditions, and the larger the temperature difference is, the higher the corresponding gear is.
A closing unit 33 for closing the water inlet valve 210 of the water heater so that the cold water pipe 100, the hot water pipe 600, the heating pipe 500 and the driving pipe 400 of the water heater constitute a closed circulation line;
the control valves of the water inlet valve 210 and the shunt pipe 300 of the water heater are closed, so that the cold water pipe 100, the hot water pipe 600, the heating pipe 500 and the driving pipe 400 form a closed circulation pipeline, and necessary conditions are provided for water circulation heating.
And a heating unit 34 for turning on a water pump 410 disposed on the driving pipe 400, sending cold water in the cold water pipe 100 to the heating pipe 500 through the driving pipe 400, heating water in the heating pipe 500 by the heating device with a target heating power, and flowing hot water heated to a preset water temperature into the hot water pipe 600.
In this embodiment, through detecting cold water temperature to set up heating device's heating power according to cold water temperature, target temperature, in order to guarantee that the user can use required hot water, thereby satisfy user's demand.
In order to make the user use the hot water more timely, the heating module further includes:
a first obtaining unit 35 for obtaining the capacity of the hot water pipe 600 and the preset power of the water pump 410; there are various ways to obtain the volume of the hot water pipe 600, and before the hot water pipe 600 is assembled, the volume of the hot water pipe 600 is detected, or it can be calculated according to the length and diameter of the pipe, or obtained from the storage device of the water heater. The power of the water pump 410 may be set by a user or may be a default setting.
A second calculating unit 36 for calculating a filling time required for hot water to fill the hot water pipe 600 according to the capacity of the hot water pipe 600 and a preset power of the water pump 410; the time period for filling the hot water pipe 600 is a ratio of the capacity of the hot water pipe 600 to the power of the water pump 410, i.e., the time period for filling the hot water pipe 600 is inversely proportional to the capacity and directly proportional to the power of the water pump 410.
And a third calculating unit 37 for calculating the time when the water pump 410 and the heating device are turned on according to the filling time period and the preheating operation period.
Taking the preheating working time period of 20: 00-21: 00 as an example, and taking the filling time period of 2 minutes as an example, the latest time for turning on the water pump 410 and the heating device is 2 minutes before 20:00, namely 19: 58.
For example, to further save energy and avoid heating redundant hot water, the heating module further includes:
a second acquiring unit for acquiring a terminal water temperature of a hot water inlet 710 of the water heater shower 700;
in this embodiment, a temperature sensor is disposed at a hot water inlet 710 of the shower head 700 to detect a temperature of hot water entering the shower head 700.
And a stopping unit for turning off the water pump 410 and the heating assembly when the terminal water temperature is greater than or equal to a preset water temperature.
When the temperature of the water at the hot water inlet 710 is greater than or equal to the preset temperature, it is indicated that the whole hot water pipe 600 is filled with hot water (since the shower head 700 is disposed at the junction of the cold water pipe 100 and the hot water pipe 600, the hot water inlet 710 of the shower head 700 is the extreme end of the hot water pipe 600, and when the extreme water temperature meets the requirement of the preset temperature, the temperature of the water in the whole hot water pipe 600 should meet the preset temperature). At this time, the water pump 410 and the heating device may be turned off, of course. So set up to make heating device and water pump 410's operating time more accurate, avoid heating device and water pump 410 to work overlength's time to make the energy obtain more reasonable utilization.
In order to maintain the temperature of water in the hot water pipe 600 during the preheating operation period, the water heater further includes:
the detection module is used for acquiring the current water temperature in the hot water pipe 600 in the preheating working period;
a temperature sensor is arranged in the hot water pipe 600, and the temperature of the hot water in the hot water pipe 600 is detected in real time in a preheating working period.
And the heat preservation module is used for heating the water in the hot water pipe 600 to a preset water temperature when the current water temperature is less than or equal to the preset lowest water temperature.
The water heater is preset with a water temperature range in the hot water pipe 600, that is, when the detected current water temperature is in the water temperature range, the heating device does not work, and when the current water temperature is lower than the lowest value of the water temperature range, the water inlet valve 210 is closed, the heating device and the water pump 410 are opened, and the hot water in the hot water pipe 600 is heated.
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 (6)
1. A control method of a water heater is characterized by comprising the following steps:
receiving a timed cruise instruction;
acquiring the preheating working period of the water heater according to the timed cruise instruction;
heating the water temperature in a hot water pipe of a water heater to a preset water temperature before a preheating working period;
the pipeline of the water heater comprises a cold water pipe, a hot water pipe, a heating pipe and a shunt pipe which are sequentially connected, one end of the shunt pipe, which is far away from the heating pipe, is communicated with the cold water pipe, the pipeline of the water heater also comprises a driving pipe which is connected with the shunt pipe in parallel, a water inlet pipe of the water heater is respectively communicated with the cold water pipe and the shunt pipe, a water inlet valve is arranged on the water inlet pipe, and a water pump is arranged on the driving pipe;
before a user uses water, the water inlet valve is closed, so that the cold water pipe, the hot water pipe, the heating pipe and the driving pipe form a closed circulating water path, a heating device of the water heater and the water pump are started, the heating device heats cold water passing through the heating pipe, the heated hot water flows into the hot water pipe, and the cold water in the original hot water pipe flows into the cold water pipe under the action of the water pump;
the step of heating the water temperature in the hot water pipe of the water heater to a preset water temperature before the preheating working period comprises the following steps:
detecting the temperature of cold water in a cold water pipe;
calculating target heating power of a heating device of the water heater according to the cold water temperature and a preset water temperature;
closing a water inlet valve of the water heater to enable a cold water pipe, a hot water pipe, a heating pipe and a driving pipe of the water heater to form a closed circulation pipeline;
starting a water pump arranged on the driving pipe, sending cold water in the cold water pipe to the heating pipe after passing through the driving pipe, heating water in the heating pipe by the heating device with target heating power, and enabling hot water heated to a preset water temperature to flow into the hot water pipe;
the method also comprises the following steps before the step of detecting the temperature of the cold water in the cold water pipe:
acquiring the capacity of a hot water pipe and the preset power of a water pump;
calculating the filling time required by filling the hot water pipe with hot water according to the capacity of the hot water pipe and the preset power of the water pump;
and calculating the time for starting the water pump and the heating device according to the filling time and the preheating working period.
2. The method for controlling a water heater according to claim 1, wherein after the step of turning on a water pump provided on the driving pipe to supply cold water in the cold water pipe to the heating pipe through the driving pipe, the heating device heats water in the heating pipe with a target heating power, and hot water heated to a preset water temperature flows into the hot water pipe, the method further comprises:
acquiring the terminal water temperature of a hot water inlet of a sprinkler of a water heater;
and when the terminal water temperature is greater than or equal to the preset water temperature, the water pump and the heating assembly are turned off.
3. The control method of a water heater as claimed in claim 1 or 2, wherein after the step of heating the water temperature in the hot water pipe of the water heater to a preset water temperature before the preheating operation period, further comprising:
in the preheating working period, acquiring the current water temperature in the hot water pipe;
and when the current water temperature is less than or equal to the preset lowest water temperature, heating the water in the hot water pipe to the preset water temperature.
4. A water heater, comprising:
the receiving module is used for receiving a timed cruise instruction;
the timing module is used for acquiring the preheating working period of the water heater according to the timing cruise instruction;
the heating module is used for heating the water temperature in a hot water pipe of the water heater to a preset water temperature before the preheating working period;
the pipeline of the water heater comprises a cold water pipe, a hot water pipe, a heating pipe and a shunt pipe which are sequentially connected, one end of the shunt pipe, which is far away from the heating pipe, is communicated with the cold water pipe, the pipeline of the water heater also comprises a driving pipe which is connected with the shunt pipe in parallel, a water inlet pipe of the water heater is respectively communicated with the cold water pipe and the shunt pipe, a water inlet valve is arranged on the water inlet pipe, and a water pump is arranged on the driving pipe;
before a user uses water, the water inlet valve is closed, so that the cold water pipe, the hot water pipe, the heating pipe and the driving pipe form a closed circulating water path, a heating device of the water heater and the water pump are started, the heating device heats cold water passing through the heating pipe, the heated hot water flows into the hot water pipe, and the cold water in the original hot water pipe flows into the cold water pipe under the action of the water pump;
the heating module includes:
the detection unit is used for detecting the temperature of cold water in the cold water pipe;
the first calculating unit is used for calculating the target heating power of a heating device of the water heater according to the cold water temperature and the preset water temperature;
the closing unit is used for closing a water inlet valve of the water heater so that a cold water pipe, a hot water pipe, a heating pipe and a driving pipe of the water heater form a closed circulation pipeline;
the heating unit is used for starting a water pump arranged on the driving pipe, sending cold water in the cold water pipe to the heating pipe after passing through the driving pipe, heating water in the heating pipe by the heating device with target heating power, and enabling hot water heated to a preset water temperature to flow into the hot water pipe;
the first acquisition unit is used for acquiring the capacity of the hot water pipe and the preset power of the water pump;
the second calculating unit is used for calculating the filling time required by the hot water to fill the hot water pipe according to the capacity of the hot water pipe and the preset power of the water pump;
and the third calculating unit is used for calculating the time for starting the water pump and the heating device according to the filling time and the preheating working period.
5. The water heater as recited in claim 4, wherein said heating module further comprises:
the second acquisition unit is used for acquiring the terminal water temperature of a hot water inlet of the water heater sprinkler;
and the stopping unit is used for turning off the water pump and the heating assembly when the terminal water temperature is greater than or equal to the preset water temperature.
6. The water heater as claimed in claim 4 or 5, further comprising:
the detection module is used for acquiring the current water temperature in the hot water pipe in the preheating working period;
and the heat preservation module is used for heating the water in the hot water pipe to the preset water temperature when the current water temperature is less than or equal to the preset lowest water temperature.
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| CN202010577894.6A CN111721004B (en) | 2017-03-09 | 2017-03-09 | Water heater and control method thereof |
| CN201710139540.1A CN106871458B (en) | 2017-03-09 | 2017-03-09 | Water heater and control method thereof |
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| CN201710139540.1A CN106871458B (en) | 2017-03-09 | 2017-03-09 | Water heater and control method thereof |
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| CN202010577894.6A Division CN111721004B (en) | 2017-03-09 | 2017-03-09 | Water heater and control method thereof |
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| CN202010577894.6A Active CN111721004B (en) | 2017-03-09 | 2017-03-09 | Water heater and control method thereof |
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| CN107990560A (en) * | 2017-12-01 | 2018-05-04 | 广东万家乐燃气具有限公司 | Water heater pre-heating mean and water heater |
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|---|---|
| CN111721004B (en) | 2022-03-18 |
| CN106871458A (en) | 2017-06-20 |
| CN111721004A (en) | 2020-09-29 |
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Effective date of registration: 20221223 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East District, Wuhu economic and Technological Development Zone, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |
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