CN110595059A - Anti-freezing electric water heater and control method thereof - Google Patents
Anti-freezing electric water heater and control method thereof Download PDFInfo
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- CN110595059A CN110595059A CN201910947637.4A CN201910947637A CN110595059A CN 110595059 A CN110595059 A CN 110595059A CN 201910947637 A CN201910947637 A CN 201910947637A CN 110595059 A CN110595059 A CN 110595059A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 332
- 238000007710 freezing Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 230000002528 anti-freeze Effects 0.000 claims description 11
- 238000009434 installation Methods 0.000 abstract description 3
- 208000001034 Frostbite Diseases 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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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
- F24H9/133—Storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
-
- 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
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides an anti-freezing electric water heater and a control method thereof, wherein the anti-freezing electric water heater comprises an electric water heater body, a first temperature sensor, a second temperature sensor, a main control singlechip and a circulating water path; the circulating water path comprises a first water pipe, an electromagnetic valve, a second water pipe, a circulating water tank with a circulating water pump and a third water pipe, and a water outlet pipe of the electric water heater body, the first water pipe, the electromagnetic valve, the second water pipe, the circulating water tank, the third water pipe and a water inlet pipe of the electric water heater body are sequentially communicated. When the temperature of the water inlet is too low, the main control single chip controls the heating pipe to be opened to heat the water in the inner container; meanwhile, the main control single chip controls the electromagnetic valve and the circulating water pump to be opened, so that water in the liner flows in the liner, the water outlet pipe, the first water pipe, the electromagnetic valve, the second water pipe, the circulating water tank, the third water pipe and the water inlet pipe in a circulating mode, the liner and the water inlet and outlet pipelines of the electric water heater can achieve the anti-freezing function, the installation adaptability of products is improved, and the requirements of consumers are met.
Description
Technical Field
The invention relates to the field of electric water heaters, in particular to an anti-freezing electric water heater and a control method thereof.
Background
As a common household appliance, an electric water heater generally meets the use requirement of a user on hot water by heating water in an inner container. The whole electric water heater and the pipeline system generally have two installation modes: one is installed in a bathroom, and the water inlet and outlet pipelines are also embedded in the wall; the other type is arranged on an outdoor balcony, and the water inlet and outlet pipes are exposed outdoors. In the case of extreme low temperature weather in winter, the conventional electric water heater is subjected to anti-freezing protection treatment. The main method comprises the following steps: the water temperature of the inner container is detected in a shutdown state, and if the water temperature is lower than the anti-freezing temperature limit value, the water in the inner container is heated, so that the water temperature of the inner container is ensured to be in a proper range, and the problem that the inner container is frozen and cracked to leak water is avoided.
Aiming at an electric water heater arranged on an outdoor balcony, the water temperature in the inner container can be ensured to be in a proper range by using the existing inner container heating method, but the exposed water inlet and outlet pipe cannot be protected, and if extreme weather occurs, the water inlet and outlet pipe can be directly frozen and cracked, so that a user cannot use the electric water heater. Although the existing inner container heating method can realize the anti-freezing function for an electric water heater installed in a bathroom, if power failure occurs or a user is not at home for a long time and the power supply is turned off, if extreme weather occurs at the moment, the water temperature in the inner container is too low, the existing electric water heater cannot give an alarm in time to remind the user to take corresponding protection measures, and therefore the inner container is damaged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the anti-freezing electric water heater and the control method thereof.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an anti-freezing electric water heater comprises an electric water heater body, a first temperature sensor, a second temperature sensor, a main control single chip microcomputer and a circulating water path; the first temperature sensor is arranged in the inner container of the electric water heater body and used for detecting the temperature of water in the inner container, the second temperature sensor is arranged at the water inlet pipe of the electric water heater body and used for detecting the water inlet temperature at the water inlet pipe, and the output ends of the first temperature sensor and the second temperature sensor are electrically connected with the input end of the main control single chip microcomputer; the water circulation system is characterized in that the water circulation path comprises a first water pipe, an electromagnetic valve, a second water pipe, a circulation water tank with a circulation water pump and a third water pipe, wherein a water outlet pipe of the electric water heater body, the first water pipe, the electromagnetic valve, the second water pipe, the circulation water tank, the third water pipe and a water inlet pipe of the electric water heater body are sequentially communicated, control ends of the electromagnetic valve and the circulation water tank are electrically connected with an output end of the main control single chip microcomputer, and an output end of the main control single chip microcomputer is electrically connected with a control end of a heating.
Preferably, the anti-freezing electric water heater body further comprises a water mixing valve, and a water inlet pipe and a water outlet pipe of the electric water heater body are both connected to the water mixing valve, and are mixed with water through the water mixing valve and then conveyed to a water using point through a pipeline.
Preferably, the anti-freezing electric water heater body further comprises a power panel and a display control panel, the power panel is provided with an alternating current/direct current conversion circuit, an alternating current input end of the alternating current/direct current conversion circuit is connected with an alternating current commercial power, and a direct current output end of the alternating current/direct current conversion circuit is connected with an action relay power supply end of the heating pipe and a display control panel power supply end.
Preferably, the ac/dc conversion circuit is a dual-output ac/dc conversion circuit, the input terminal of the dual-output ac/dc conversion circuit is connected to 220V ac mains supply, the output terminal of the dual-output ac/dc conversion circuit outputs 12V dc and 5V dc respectively, the 12V dc supplies power to the action relay of the heating tube, and the 5V dc supplies power to the display control panel.
Preferably, the display control panel is provided with a power-off anti-freezing alarm circuit, the power-off anti-freezing alarm circuit comprises a charging and power-off power supply circuit, a rechargeable battery and an anti-freezing indicator light, the input end of the charging and power-off power supply circuit is connected with the direct current output end of the alternating current/direct current conversion circuit, the output end of the charging and power-off power supply circuit is connected with the power input end of the main control single chip microcomputer and the rechargeable battery, and the output end of the main control single chip microcomputer is connected; when the electric water heater is started, the AC/DC conversion circuit supplies power to the main control singlechip and charges the rechargeable battery, and when the electric water heater is shut down, the rechargeable battery supplies power to the main control singlechip. Therefore, even if power failure or long-time not at home of user and when the condition of closing the power, main control singlechip also can work, detects the temperature of inner bag and inlet outlet through first sensor and second sensor, and when the temperature of inner bag and inlet outlet was crossed lowly, also can carry out the early warning that prevents frostbite through the pilot lamp that prevents frostbite.
Preferably, the display control panel is further provided with an anti-freezing function key, and the anti-freezing function key is electrically connected with the input end of the main control single chip microcomputer. After the user presses the anti-freezing control key, the main control single chip microcomputer receives a level signal, and the anti-freezing control is started.
Preferably, the display control panel is further provided with a temperature setting key, and the temperature setting key is electrically connected with the input end of the main control single chip microcomputer and is used for setting a water temperature threshold value in the inner container and a water temperature threshold value at the water inlet pipe. The anti-freezing function key is pressed down, the red anti-freezing indicator lamp under the key icon flickers and displays to show that the anti-freezing water temperature limit value is set, two water temperature thresholds can be set at the moment, the anti-freezing function key comprises a heightening key and a lowering key, and the set temperature can be displayed on the display control panel and on the display screen electrically connected with the main control single chip microcomputer.
Preferably, the anti-freezing indicator lamp is an LED lamp which is arranged on the display control panel.
The invention also provides a control method of the anti-freezing electric water heater, which comprises the following steps:
s1: the first temperature sensor detects the temperature of water in the liner, the second temperature sensor detects the water inlet temperature at the water inlet pipe, and water temperature information acquired by the first temperature sensor and the second sensor is sent to the main control single chip microcomputer;
s2: when the water temperature in the inner container is smaller than a preset water temperature threshold value in the inner container and the water temperature at the water inlet pipe is larger than a preset water temperature threshold value at the water inlet pipe, the main control single chip microcomputer controls the heating pipe to be opened to heat the water in the inner container, and the anti-freezing purpose is achieved; when the water temperature in the inner container is higher than the water temperature threshold value in the inner container, the heating pipe is closed;
s3: when the water temperature at the water inlet pipe is smaller than a preset water temperature threshold value at the water inlet pipe, the main control single chip microcomputer controls the heating pipe to be opened to heat the water in the inner container; meanwhile, the main control singlechip controls the electromagnetic valve and the circulating water pump to be opened, so that water in the liner circularly flows in the liner, the water outlet pipe, the first water pipe, the electromagnetic valve, the second water pipe, the circulating water tank, the third water pipe and the water inlet pipe, and the anti-freezing purpose is achieved; and when the water temperature at the water inlet pipe is greater than a preset water temperature threshold value at the water inlet pipe, closing the electromagnetic valve and the circulating water pump.
Preferably, the preset water temperature threshold in the inner container and the preset water temperature threshold at the water inlet pipe are 0-10 ℃.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that: the invention provides an anti-freezing electric water heater, when the temperature of a water inlet is too low, a main control single chip microcomputer controls a heating pipe to be opened, and water in an inner container is heated; meanwhile, the main control singlechip controls the electromagnetic valve and the circulating water pump to be opened, so that water in the liner flows in the liner, the water outlet pipe, the first water pipe, the electromagnetic valve, the second water pipe, the circulating water tank, the third water pipe and the water inlet pipe in a circulating manner, and the liner and the water inlet and outlet pipelines of the electric water heater can realize the anti-freezing function, so that the exposed water inlet and outlet pipes can be protected even if the electric water heater is installed outdoors, the frost crack of the water inlet and outlet pipes is avoided, the installation adaptability of products is improved, and the requirements of consumers are met.
Drawings
Fig. 1 is a schematic view of an antifreeze electric water heater according to embodiment 1.
FIG. 2 is a circuit diagram of the power-off antifreeze alarm circuit of the embodiment 1.
Fig. 3 is a flowchart of a control method of the antifreeze electric water heater of the embodiment 2.
Wherein: 1. a first temperature sensor; 2. a second temperature sensor; 3. a master control singlechip; 4. a first water pipe; 5. an electromagnetic valve; 6. a second water pipe; 7. a circulating water tank; 8. a third water pipe; 9. heating a tube; 10. a water mixing valve; 11. a power panel; 12. a display control panel; 13. an AC/DC conversion circuit; 14. a relay; 15. a power-off anti-freezing alarm circuit; 1501. a charging and power-off power supply circuit; 1502. an anti-freezing indicator light; 16. an anti-freezing function key; 17. a temperature setting button.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the embodiment provides an anti-freezing electric water heater, which includes an electric water heater body, a first temperature sensor 1, a second temperature sensor 2, a main control single chip microcomputer 3 and a circulating water path; the first temperature sensor 1 is arranged in an inner container of the electric water heater body and used for detecting the temperature of water in the inner container, the second temperature sensor 2 is arranged at a water inlet pipe of the electric water heater body and used for detecting the water inlet temperature at the water inlet pipe, and the output ends of the first temperature sensor 1 and the second temperature sensor 2 are electrically connected with the input end of the main control single chip microcomputer 3; the water circulation system is characterized in that the water circulation path comprises a first water pipe 4, an electromagnetic valve 5, a second water pipe 6, a circulation water tank 7 with a circulation water pump and a third water pipe 8, a water outlet pipe of the electric water heater body, the first water pipe 4, the electromagnetic valve 5, the second water pipe 6, the circulation water tank 7, the third water pipe 8 and a water inlet pipe of the electric water heater body are sequentially communicated, control ends of the electromagnetic valve 5 and the circulation water tank 7 are electrically connected with an output end of the main control single chip microcomputer 3, and an output end of the main control single chip microcomputer 3 is further electrically connected with a control end of a heating pipe 9 of the.
When the temperature of the water inlet is too low, the main control singlechip 3 controls the heating pipe 9 to be opened to heat the water in the inner container; meanwhile, the main control singlechip 3 controls the electromagnetic valve 5 and the circulating water pump to be opened, so that water in the liner flows in the liner, the water outlet pipe, the first water pipe 4, the electromagnetic valve 5, the second water pipe 6, the circulating water tank 7, the third water pipe 8 and the water inlet pipe in a circulating mode, and the liner and the water inlet and outlet pipelines of the electric water heater can achieve the anti-freezing function.
In this embodiment, the electromagnetic valve 5 is an electromagnetic ball valve.
The anti-freezing electric water heater body further comprises a water mixing valve 10, a water inlet pipe and a water outlet pipe of the electric water heater body are both connected to the water mixing valve 10, mixed water passes through the water mixing valve 10 and then is conveyed to water consumption points through pipelines, and the water consumption points comprise shower nozzles, water taps and the like.
The anti-freezing electric water heater body further comprises a power panel 11 and a display control panel 12, wherein the power panel 11 is provided with an alternating current/direct current conversion circuit 13, the alternating current/direct current conversion circuit 13 is a double-output alternating current/direct current conversion circuit, the input end of the alternating current/direct current conversion circuit is connected with 220V alternating current commercial power, the output end of the alternating current/direct current conversion circuit outputs 12V direct current and 5V direct current respectively, the 12V direct current supplies power for an action relay 14 of the heating pipe 9, and the 5V direct current supplies power for the.
As shown in fig. 2, the display control panel 12 is provided with a power-off anti-freezing alarm circuit 15, the power-off anti-freezing alarm circuit 15 comprises a charging and power-off power supply circuit 1501, a rechargeable battery and an anti-freezing indicator light 1502, the input end of the charging and power-off power supply circuit 1501 is connected with the 5V dc output end of the ac/dc conversion circuit 13, the output end of the charging and power-off power supply circuit 1501 is connected with the power input end of the main control single chip microcomputer 3 and the rechargeable battery, and the output end of the main control single chip microcomputer 3 is connected with; when the electric water heater is started, the AC/DC conversion circuit 13 supplies power to the main control singlechip 3 and charges the rechargeable battery, and when the electric water heater is stopped, the rechargeable battery supplies power to the main control singlechip 3. Therefore, even if power failure occurs or a user is not at home for a long time and the power supply is turned off, the main control single chip microcomputer 3 can work, the water temperatures of the inner container and the water inlet and the water outlet are detected through the first sensor 1 and the second sensor 2, and when the water temperatures of the inner container and the water inlet and the water outlet are too low, anti-freezing early warning can be performed through the anti-freezing indicator lamp 1502.
The display control panel 12 is further provided with an anti-freezing function key 16, and the anti-freezing function key 16 is electrically connected with the input end of the main control single chip microcomputer 3. After the user presses the anti-freezing control key, the main control single chip microcomputer 3 receives a level signal, and the anti-freezing control is started.
The display control panel 12 is further provided with a temperature setting key 17, and the temperature setting key 17 is electrically connected with the input end of the main control singlechip 3 and is used for setting a water temperature threshold value in the liner and a water temperature threshold value at the water inlet pipe. The anti-freezing function key 16 is pressed, the red anti-freezing indicator lamp 1502 under the key icon is displayed in a flashing mode to indicate that the setting of the anti-freezing water temperature limit value is entered, two water temperature threshold values can be set at the moment, the anti-freezing function key 16 comprises a heightening key and a lowering key, and the set temperature can be displayed on a display screen which is arranged on the display control panel 12 and is electrically connected with the main control single chip microcomputer 3.
The antifreeze indicator lamp 1502 is an LED lamp, which is disposed on the display control panel 12.
Example 2
As shown in fig. 3, the present embodiment provides a control method of an antifreeze electric water heater of embodiment 1, including the following steps:
s1: the first temperature sensor 1 detects the temperature of water in the liner, the second temperature sensor 2 detects the water inlet temperature at the water inlet pipe, and the water temperature information acquired by the first temperature sensor 1 and the second sensor is sent to the main control singlechip 3;
s2: when the water temperature in the inner container is smaller than a preset water temperature threshold value in the inner container and the water temperature at the water inlet pipe is larger than a preset water temperature threshold value at the water inlet pipe, the main control single chip microcomputer 3 controls the heating pipe 9 to be opened, so that the water in the inner container is heated, and the anti-freezing purpose is achieved; when the water temperature in the inner container is higher than the water temperature threshold value in the inner container, the heating pipe 9 is closed;
s3: when the water temperature at the water inlet pipe is smaller than a preset water temperature threshold value at the water inlet pipe, the main control single chip microcomputer 3 controls the heating pipe 9 to be opened to heat the water in the inner container; meanwhile, the main control singlechip 3 controls the electromagnetic valve 5 and the circulating water pump to be opened, so that water in the liner circularly flows in the liner, the water outlet pipe, the first water pipe 4, the electromagnetic valve 5, the second water pipe 6, the circulating water tank 7, the third water pipe 8 and the water inlet pipe, and the anti-freezing purpose is achieved; and when the water temperature at the water inlet pipe is greater than the preset water temperature threshold value at the water inlet pipe, closing the electromagnetic valve 5 and the circulating water pump.
The preset water temperature threshold value in the inner container and the preset water temperature threshold value at the water inlet pipe are 0-10 ℃, and the temperature in the embodiment can be set to be 5 ℃.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An anti-freezing electric water heater is characterized by comprising an electric water heater body, a first temperature sensor (1), a second temperature sensor (2), a main control single chip microcomputer (3) and a circulating water path; the first temperature sensor (1) is arranged in an inner container of the electric water heater body and used for detecting the temperature of water in the inner container, the second temperature sensor (2) is arranged at a water inlet pipe of the electric water heater body and used for detecting the water inlet temperature at the water inlet pipe, and the output ends of the first temperature sensor (1) and the second temperature sensor (2) are electrically connected with the input end of the main control single chip microcomputer (3); the water circulation system is characterized in that the water circulation path comprises a first water pipe (4), an electromagnetic valve (5), a second water pipe (6), a circulation water tank (7) with a circulation water pump and a third water pipe (8), wherein the water outlet pipe of the electric water heater body, the first water pipe (4), the electromagnetic valve (5), the second water pipe (6), the circulation water tank (7), the third water pipe (8) and the water inlet pipe of the electric water heater body are sequentially communicated, the control ends of the electromagnetic valve (5) and the circulation water tank (7) are electrically connected with the output end of the main control single chip microcomputer (3), and the output end of the main control single chip microcomputer (3) is electrically connected with the control end of the heating pipe (9) of.
2. The anti-freezing electric water heater according to claim 1, wherein the anti-freezing electric water heater body further comprises a water mixing valve (10), and the water inlet pipe and the water outlet pipe of the electric water heater body are both connected to the water mixing valve (10) and are mixed with water through the water mixing valve (10) and then are conveyed to a water using point through a pipeline.
3. The antifreeze electric water heater of claim 1, further comprising a power panel (11) and a display control panel (12), wherein the power panel (11) is provided with an AC/DC converting circuit (13), an AC input end of the AC/DC converting circuit (13) is connected with an AC commercial power, and a DC output end of the AC/DC converting circuit (13) is connected with a power end of an action relay (14) of the heating pipe (9) and a power end of the display control panel (12).
4. The antifreeze electric water heater of claim 3, wherein the AC/DC conversion circuit (13) is a double-output AC/DC conversion circuit, the input end of the AC/DC conversion circuit is connected with 220V AC commercial power, the output end of the AC/DC conversion circuit respectively outputs 12V DC and 5V DC, the 12V DC supplies power for the action relay (14) of the heating pipe (9), and the 5V DC supplies power for the display control panel (12).
5. The anti-freezing electric water heater according to claim 3, characterized in that the display control panel (12) is provided with a power-off anti-freezing alarm circuit (15), the power-off anti-freezing alarm circuit (15) comprises a charging and power-off power supply circuit (1501), a rechargeable battery and an anti-freezing indicator lamp (1502), the input end of the charging and power-off power supply circuit (1501) is connected with the direct current output end of the alternating current/direct current conversion circuit (13), the output end of the charging and power-off power supply circuit (1501) is connected with the power input end of the main control singlechip (3) and the rechargeable battery, and the output end of the main control singlechip (3) is connected with the anti-freezing; when the electric water heater is started, the AC/DC conversion circuit (13) supplies power to the main control singlechip (3) and charges the rechargeable battery, and when the electric water heater is stopped, the rechargeable battery supplies power to the main control singlechip (3).
6. The anti-freezing electric water heater according to claim 5, characterized in that the display control panel (12) is further provided with an anti-freezing function key (16), and the anti-freezing function key (16) is electrically connected with the input end of the main control singlechip (3).
7. The anti-freezing electric water heater according to claim 5, wherein the display control panel (12) is further provided with a temperature setting key (17), and the temperature setting key (17) is electrically connected with the input end of the main control singlechip (3) and is used for setting a water temperature threshold value in the liner and a water temperature threshold value at the water inlet pipe.
8. The antifreeze electric water heater of claim 5, wherein the antifreeze indicator light (1502) is an LED light which is arranged on the display control panel (12).
9. The control method of the antifreeze electric water heater of any one of claims 1 to 8, comprising the following steps:
s1: the temperature of water in the liner is detected by the first temperature sensor (1), the temperature of water in the liner is detected by the second temperature sensor (2), and water temperature information acquired by the first temperature sensor (1) and the second temperature sensor is sent to the main control single chip microcomputer (3);
s2: when the water temperature in the inner container is smaller than a preset water temperature threshold value in the inner container and the water temperature at the water inlet pipe is larger than a preset water temperature threshold value at the water inlet pipe, the main control single chip microcomputer (3) controls the heating pipe (9) to be opened, so that the water in the inner container is heated, and the anti-freezing purpose is achieved; when the water temperature in the inner container is higher than the water temperature threshold value in the inner container, the heating pipe (9) is closed;
s3: when the water temperature at the water inlet pipe is smaller than a preset water temperature threshold value at the water inlet pipe, the main control single chip microcomputer (3) controls the heating pipe (9) to be opened, and water in the inner container is heated; meanwhile, the main control singlechip (3) controls the electromagnetic valve (5) and the circulating water pump to be opened, so that water in the liner circularly flows in the liner, the water outlet pipe, the first water pipe (4), the electromagnetic valve (5), the second water pipe (6), the circulating water tank (7), the third water pipe (8) and the water inlet pipe, and the anti-freezing purpose is achieved; and when the water temperature at the water inlet pipe is greater than the preset water temperature threshold value at the water inlet pipe, closing the electromagnetic valve (5) and the circulating water pump.
10. The control method of the antifreeze electric water heater of claim 9, wherein the preset water temperature threshold in the inner container and the preset water temperature threshold at the water inlet pipe are 0-10 ℃.
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| CN201910947637.4A CN110595059A (en) | 2019-09-29 | 2019-09-29 | Anti-freezing electric water heater and control method thereof |
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| CN201910947637.4A CN110595059A (en) | 2019-09-29 | 2019-09-29 | Anti-freezing electric water heater and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178943A (en) * | 2020-09-18 | 2021-01-05 | 华帝股份有限公司 | Anti-freezing control method and water heater using same |
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| CN210801584U (en) * | 2019-09-29 | 2020-06-19 | 广东万和热能科技有限公司 | Anti-freezing electric water heater |
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| CN107367051A (en) * | 2016-05-12 | 2017-11-21 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and method for preventing freezing by using water pump and heating resistor |
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