CN113720021A - Water heater anti-freezing method and water heater - Google Patents
Water heater anti-freezing method and water heater Download PDFInfo
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- CN113720021A CN113720021A CN202111004346.5A CN202111004346A CN113720021A CN 113720021 A CN113720021 A CN 113720021A CN 202111004346 A CN202111004346 A CN 202111004346A CN 113720021 A CN113720021 A CN 113720021A
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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
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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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention discloses a water heater anti-freezing method and a water heater, wherein the method comprises the following steps: detecting the temperature of water stored in a heat exchange tube of the water heater in a standby state; when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, a circulating water pump is started to drive the water stored inside and outside the water heater to circularly flow; after the circulating water pump is started, detecting water flow in real time, and giving an alarm prompt if the detected water flow is smaller than a preset starting flow; if the measured water flow is more than or equal to the preset starting-up flow, closing the circulating water pump and igniting to heat the stored water of the heat exchange pipe; after entering a heating state, a small-firepower static heating mode is adopted to enable water stored in the heat exchanger to slowly rise; and when the temperature in the heat exchange pipe is detected to be higher than the anti-freezing warning temperature, the water heater is extinguished, stops heating and is switched to a standby state.
Description
Technical Field
The invention relates to the technical field of household hot water equipment, in particular to a water heater anti-freezing method and a water heater.
Background
In northern areas, gas water heaters are typically installed in indoor kitchens with the exhaust pipe extending out to the outdoors. In winter, in a non-use state, outdoor cold air continuously invades through the exhaust pipe, so that water stored in a heat exchange pipe of the built-in heat exchanger is frozen, the water heater cannot be normally used, the water pipe can be burst in serious conditions, water leakage accidents are caused, and property loss of users is caused.
In order to solve the problem of frost cracking of the water heater in winter, part of the existing zero-cold-water heaters have a circulating heating anti-freezing function, namely a circulating water pump works in the whole process in the heating process to realize circulating heating. The water stored in the water channel inside and outside the water heater is in a circulating state in the heating process by the conventional circulating heating anti-freezing method, so that the water stored in the external pipeline of the water heater is heated at the same time, and the problem of high use cost caused by overlarge gas consumption is solved.
Disclosure of Invention
The invention aims to provide a water heater anti-freezing method and a water heater, and the water heater has the advantages that: according to the anti-freezing method, the circulating water pump is started firstly so that the water flow detection device can identify whether the water flow in the heat exchange pipe is the water flow when hot water is used for starting or not, so that dry burning is prevented, when the water flow in the heat exchange pipe is the water flow when hot water is used for starting, the circulating water pump is closed, and finally, the water stored in the heat exchange pipe is subjected to small-firepower static heating, so that external stored water cannot be heated, and therefore the effects of quickly heating and preventing freezing, reducing gas consumption and avoiding the water heater from being damaged by dry burning are achieved.
The invention discloses a water heater anti-freezing method, which comprises the following steps: detecting the temperature of water stored in a heat exchange tube of the water heater in a standby state; when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, a circulating water pump is started to drive the water stored inside and outside the water heater to circularly flow; after the circulating water pump is started, detecting water flow in real time, and giving an alarm prompt if the detected water flow is smaller than a preset starting flow; if the measured water flow is more than or equal to the preset starting-up flow, closing the circulating water pump and igniting to heat the stored water of the heat exchange pipe; after entering a heating state, a small-firepower static heating mode is adopted to enable water stored in the heat exchanger to slowly rise; and when the temperature in the heat exchange pipe is detected to be higher than the anti-freezing warning temperature, the water heater is extinguished, stops heating and is switched to a standby state.
The anti-freezing method of the water heater can also comprise the following steps:
detecting the temperature of water stored in a heat exchange pipe of a water heater in a standby state comprises: the temperature of water stored in a heat exchange tube of the water heater is detected by an anti-freezing temperature probe in a standby state of the water heater, and the anti-freezing warning temperature is 0-10 ℃.
When the temperature in the heat exchange pipe that detects drops to the warning temperature that prevents frostbite, open circulating water pump to drive the inside and outside circulation of depositing water of water heater and flow and include: and when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, the static heating anti-freezing mode is entered, the controller starts the circulating water pump to drive the water stored inside and outside the water heater to circularly flow, and the circulating water pump runs for 10s and is automatically closed.
After circulating water pump opened, real-time detection discharge, if survey discharge and be less than preset start flow, then the suggestion of reporting to the police includes: after the circulating water pump is started, the water flow sensing device detects the water flow of water in real time, the preset starting flow is 2.5L/min, and if the detected water flow is less than 2.5L/min, an alarm is given.
If the measured water flow is more than or equal to the preset starting flow, the steps of closing the circulating water pump and igniting to heat the water stored in the heat exchange tube comprise: the preset starting flow is 2.5L/min, and if the measured water flow is more than or equal to 2.5L/min, the controller closes the circulating water pump and ignites to heat the stored water of the heat exchange pipe.
After entering the heating state, adopt little firepower static heating mode, make heat exchanger deposit water and slowly rise and include: in the static heating anti-freezing mode, after the heating state is entered, the controller limits the maximum gas opening of the gas control valve, and a small-firepower static heating mode is adopted to slowly rise the stored water in the heat exchanger so as to prevent the stored water from locally overheating and boiling to generate abnormal sound.
When detecting that the temperature is greater than the warning temperature that prevents frostbite in the heat exchange tube, the water heater stalls and stops heating and switches to standby state and includes: and when the temperature in the heat exchange pipe measured by the anti-freezing temperature probe is higher than the anti-freezing warning temperature, the water stored in the heat exchanger is heated, the static heating anti-freezing mode is exited, the water heater is turned off, and the standby state is switched.
And when the temperature of the water stored in the heat exchange pipe is detected to be 15-35 ℃, closing the water heater and switching to a standby state.
Further comprising: in the small-fire static heating, if an external hot water outlet valve is opened and the detected water flow is more than or equal to the starting flow, the static heating is switched to a common shower starting mode.
The invention also provides a water heater adopting the anti-freezing method, which comprises a water heater body, an anti-freezing temperature sensor, a water return pipe, a one-way valve, a circulating water pump and a water flow sensor, wherein the anti-freezing temperature sensor is arranged on a heat exchange pipe of the water heater body and is connected with a controller of the water heater body so as to detect the temperature of stored water in the heat exchange pipe in real time, one end of the water return pipe is communicated with the water outlet end of the heat exchange pipe, the other end of the water return pipe is communicated with the water inlet end of the heat exchange pipe, the one-way valve is arranged on the water return pipe so as to prevent tap water from entering the water return pipe, the circulating water pump is arranged on the heat exchange pipe of the water heater body and is connected with the controller of the water heater body so as to enable the stored water in the heat exchange pipe to circulate in the heat exchange pipe and the water return pipe, the water flow sensor is arranged on the heat exchange pipe of the water heater body and is connected with the controller of the water heater body, so as to detect the flow of the stored water in the heat exchange pipe.
Compared with the prior art, the anti-freezing method for the water heater and the water heater have the advantages that: according to the anti-freezing method, the circulating water pump is started firstly so that the water flow detection device can identify whether the water flow in the heat exchange pipe is the water flow when hot water is used for starting or not, so that dry burning is prevented, when the water flow in the heat exchange pipe is the water flow when hot water is used for starting, the circulating water pump is closed, and finally, the water stored in the heat exchange pipe is subjected to small-firepower static heating, so that external stored water cannot be heated, and therefore the effects of quickly heating and preventing freezing, reducing gas consumption and avoiding the water heater from being damaged by dry burning are achieved.
Drawings
FIG. 1 is a control logic diagram of a water heater anti-freezing method of the present invention.
Fig. 2 is a schematic structural diagram of a water heater according to the present invention.
Description of the figures
1. A water heater body; 11. a heat exchange pipe; 12. a controller; 13. a gas control valve; 14. an inlet water temperature sensor; 15. an effluent temperature sensor; 16. a display; 17. a heat exchanger;
2. an anti-freezing temperature sensor; 3. a water return pipe; 4. a one-way valve; 5. a water circulating pump; 6. a water flow sensor.
Detailed Description
The anti-freezing method for the water heater and the water heater of the invention are further described in detail with reference to fig. 1 and 2 of the accompanying drawings.
The invention relates to a water heater anti-freezing method, which is suitable for a household hot water supply gas quick water heater and a dual-purpose furnace.
Referring to fig. 1 and 2, the antifreeze method for a water heater of the present invention includes:
detecting the temperature of water stored in a heat exchange tube of the water heater in a standby state;
when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, a circulating water pump is started to drive the water stored inside and outside the water heater to circularly flow;
after the circulating water pump is started, detecting water flow in real time, and if the detected water flow is smaller than the preset starting flow, alarming and prompting to wait for the fault problem that manual slag discharge water flow is small or no water flow exists;
if the measured water flow is more than or equal to the preset starting-up flow, closing the circulating water pump and igniting to heat the stored water of the heat exchange pipe;
after entering a heating state, a small-firepower static heating mode is adopted to enable water stored in the heat exchanger to slowly rise;
and when the temperature in the heat exchange pipe is detected to be higher than the anti-freezing warning temperature, the water heater is extinguished, stops heating and is switched to a standby state.
According to the anti-freezing method for the water heater, the circulating water pump is started firstly so that the water flow detection device can identify whether the water flow of the hot water for starting is in the heat exchange pipe or not so as to prevent dry burning, and when the water flow of the hot water for starting is in the heat exchange pipe, the circulating water pump is closed, and finally the water stored in the heat exchange pipe is subjected to small-firepower static heating, so that external stored water cannot be heated, and therefore the effects of rapid heating and anti-freezing, reduction of gas consumption and prevention of damage to the water heater due to dry burning are achieved.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: detecting the temperature of water stored in a heat exchange pipe of a water heater in a standby state comprises: the temperature of water stored in a heat exchange tube of the water heater is detected in real time by an anti-freezing temperature probe in a standby state of the water heater, and the anti-freezing warning temperature is 0-10 ℃, preferably 1-5 ℃. For example, the anti-freezing temperature probe is an anti-freezing temperature sensor arranged on the heat exchange tube, and the anti-freezing temperature sensor is electrically connected with the controller, so that the controller can automatically control according to an electric signal of the anti-freezing temperature sensor.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: when the temperature in the heat exchange pipe that detects drops to the warning temperature that prevents frostbite, open circulating water pump to the drive water heater is inside and outside deposited water circulation flow and is included: when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, a static heating anti-freezing mode is entered, the controller starts the circulating water pump to drive the water stored inside and outside the water heater to circularly flow, and the circulating water pump runs for 10s and is automatically closed. The circulating water pump operates for 10s, so that stored water inside and outside the water heater can flow in a circulating mode, and the time for detecting flow too long is not occupied, for example, the circulating water pump is arranged on the heat exchange pipe and electrically connected with the controller, and when the anti-freezing temperature sensor detects that the temperature in the heat exchange pipe is reduced to 3 ℃, the controller controls the circulating water pump to operate for 10 seconds and then automatically close, so that the effects that stored water inside and outside the automatic water heater can circulate automatically and can stop circulation automatically are achieved. Of course, the operation time of the circulating water pump is not limited to 10s, and may be less than 10s or greater than 10s, and the person skilled in the art can select the operation time of the circulating water pump according to actual needs.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: after circulating water pump opened, real-time detection discharge, if survey discharge and be less than preset start flow, then the suggestion of reporting to the police includes: after the circulating water pump is started, the water flow sensing device detects the water flow of water in real time, the preset starting flow is 2.5L/min, and if the detected water flow is less than 2.5L/min, an alarm is given. For example, the water flow sensing device is a water flow sensor arranged on the circulating pipeline, and the water flow sensor is electrically connected with the controller, so that the controller can automatically control according to an electric signal of the water flow sensor. Certainly, the preset boot flow is not limited to 2.5L/min, for example, the preset boot flow is 2-3L/min, and a person skilled in the art can preset the boot flow value according to actual needs.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: if the measured water flow is more than or equal to the preset starting flow, the steps of closing the circulating water pump and igniting to heat the water stored in the heat exchange tube comprise: the preset starting flow is 2.5L/min, and if the measured water flow is more than or equal to 2.5L/min, the controller closes the circulating water pump and ignites to heat the stored water of the heat exchange pipe. For example, the ignition mechanism comprises a gas control valve, an ignition needle and an induction needle which are connected with a controller, and a burner and a heat exchanger, wherein when the ignition mechanism is ignited, the controller controls the gas control valve to be opened, the ignition needle to discharge electricity, and the burner ignites and heats a fin part of the heat exchanger so as to transfer heat to the heat exchange tube.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: after entering the heating state, adopt little firepower static heating mode, make heat exchanger deposit water and slowly rise and include: in the static heating anti-freezing mode, after the heating state is entered, the controller limits the maximum gas opening of the gas control valve, and a small-firepower static heating mode is adopted to slowly rise the stored water in the heat exchanger so as to prevent the stored water from locally overheating and boiling to generate abnormal sound.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: when detecting that the temperature is greater than the warning temperature that prevents frostbite in the heat exchange tube, the water heater stalls and stops heating and switches to standby state and includes: when the temperature in the heat exchange pipe measured by the anti-freezing temperature probe is higher than the anti-freezing warning temperature, the water stored in the heat exchanger is heated, the static heating anti-freezing mode is exited, and the water heater is turned off and switched to a standby state. For example, upon exiting the static heating antifreeze mode, the controller controls the gas control valve to close.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: and when the temperature of the water stored in the heat exchange pipe is detected to be 15-35 ℃, closing the water heater and switching to a standby state. The water storage temperature exiting the static heating anti-freezing mode is not limited to 15-35 ℃, and the water storage temperature can exit the static heating anti-freezing mode as long as the water storage temperature is higher than the anti-freezing warning temperature.
Referring to fig. 1 and 2, the antifreeze method for a water heater according to the present invention may further include: further comprising: in the small-firepower static heating, if an external hot water outlet valve is opened and the detected water flow is more than or equal to the starting flow, the static heating is switched to a common hot water starting mode. For example, in the small-power static heating, when a user opens a shower valve or a hot water valve, the static heating is switched to a normal shower mode, thereby achieving an effect of flexible use.
The invention also provides a water heater adopting the anti-freezing method, which comprises a water heater body 1, an anti-freezing temperature sensor 2, a water return pipe 3, a one-way valve 4, a circulating water pump 5 and a water flow sensor 6.
The water heater body 1 comprises a heat exchange pipe 11, a controller 12, a gas control valve 13, an inlet water temperature sensor 14, an outlet water temperature sensor 15, a display 16 and a heat exchanger 17, wherein the gas control valve 13, the inlet water temperature sensor 14, the outlet water temperature sensor 15 and the display 16 are all connected with the controller 12.
The anti-freezing temperature sensor 2 is arranged on the heat exchange pipe 11 of the water heater body 1 and is connected with the controller 12 of the water heater body 1 so as to detect the temperature of the stored water in the heat exchange pipe 11 in real time.
One end of the water return pipe 3 is communicated with the water outlet end of the heat exchange pipe 11, the other end of the water return pipe is communicated with the water inlet end of the heat exchange pipe 11, and the water return pipe 3 and the heat exchange pipe 11 jointly form a water circulation pipeline. Of course, the water circulation line is not limited to only the water return pipe 3 and the heat exchange pipe 11, for example, as shown in fig. 1, one end of the water return pipe 3 is connected to an external hot water pipe, and the other end of the water return pipe 3 is connected to a tap water pipe, thus realizing circulation of water stored in and out of the water heater.
A check valve 4 is installed on the return pipe 3 to prevent the running water from entering the return pipe 3.
The circulating water pump 5 is installed on the heat exchange pipe 11 of the water heater body 1 and connected with the controller 12 of the water heater body 1 so as to circulate the water stored in the heat exchange pipe 11 and the water return pipe 3.
The water flow sensor 6 is installed on the heat exchange pipe 11 of the water heater body 1 and connected with the controller 12 of the water heater body 1 to detect the water storage flow in the heat exchange pipe 11.
In the standby state, the antifreeze temperature sensor 2 detects the temperature of the water stored in the heat exchange pipe 11.
When the detected temperature in the heat exchange pipe 11 is reduced to the anti-freezing warning temperature, the controller 12 controls the circulating water pump 5 to be started so as to drive the water stored inside and outside the water heater to circularly flow.
After the circulating water pump 5 is started, the water flow sensor 6 detects water flow in real time, if the detected water flow is smaller than the preset starting flow, an alarm is given to prompt, and the fault problem that the flow of the manual slag discharge water is small or no water flow exists is waited; the display 16 displays the type of fault.
If the water flow measured by the water flow sensor 6 is greater than or equal to the preset starting-up flow, the controller 12 closes the circulating water pump 5, and the controller 12 controls the fuel gas control valve 13 to open the ignition heating water storage of the heat exchange pipe 11.
After the water enters the heating state, the water stored in the heat exchanger slowly rises by adopting a small-firepower static heating mode.
When the anti-freezing temperature sensor 2 detects that the temperature in the heat exchange pipe 11 is higher than the anti-freezing warning temperature, the controller 12 controls the gas control valve 13 to close to stop heating and switches to a standby state.
In the static heating with small firepower, if a user opens an external shower valve or a hot water valve, the static heating is switched to a common shower starting mode, so that the effect of flexible use is realized.
The above description is only for the purpose of illustrating a few embodiments of the present invention, and should not be taken as limiting the scope of the present invention, in which equivalent changes, modifications, or scaling up or down, etc. made in accordance with the spirit of the present invention should be considered as falling within the scope of the present invention.
Claims (10)
1. An anti-freezing method for a water heater, comprising the following steps:
detecting the temperature of water stored in a heat exchange tube of the water heater in a standby state;
when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, a circulating water pump is started to drive the water stored inside and outside the water heater to circularly flow;
after the circulating water pump is started, detecting water flow in real time, and giving an alarm prompt if the detected water flow is smaller than a preset starting flow;
if the measured water flow is more than or equal to the preset starting-up flow, closing the circulating water pump and igniting to heat the stored water of the heat exchange pipe;
after entering a heating state, a small-firepower static heating mode is adopted to enable water stored in the heat exchanger to slowly rise;
and when the temperature in the heat exchange pipe is detected to be higher than the anti-freezing warning temperature, the water heater is extinguished, stops heating and is switched to a standby state.
2. The antifreeze method for a water heater as claimed in claim 1, wherein the detecting of the temperature of the water stored in the heat exchange pipe of the water heater in the standby state comprises: the temperature of water stored in a heat exchange tube of the water heater is detected by an anti-freezing temperature probe in a standby state of the water heater, and the anti-freezing warning temperature is 0-10 ℃.
3. The antifreeze method for water heaters as claimed in claim 1, wherein the step of starting the circulating water pump to drive the circulation flow of the water stored in and out of the water heater when the detected temperature in the heat exchange pipe falls to the antifreeze warning temperature comprises: and when the detected temperature in the heat exchange pipe is reduced to the anti-freezing warning temperature, the static heating anti-freezing mode is entered, the controller starts the circulating water pump to drive the water stored inside and outside the water heater to circularly flow, and the circulating water pump runs for 10s and is automatically closed.
4. The anti-freezing method for the water heater according to claim 1, wherein after the circulating water pump is started, the water flow is detected in real time, and if the detected water flow is smaller than the preset starting-up flow, the alarm prompt comprises the following steps: after the circulating water pump is started, the water flow sensing device detects the water flow of water in real time, the preset starting flow is 2.5L/min, and if the detected water flow is less than 2.5L/min, an alarm is given.
5. The antifreeze method for water heaters as set forth in claim 1, wherein, if the measured water flow rate is equal to or greater than the preset starting-up flow rate, turning off the circulating water pump and igniting the stored water in the heat exchange tube comprises: the preset starting flow is 2.5L/min, and if the measured water flow is more than or equal to 2.5L/min, the controller closes the circulating water pump and ignites to heat the stored water of the heat exchange pipe.
6. The antifreeze method for water heater according to claim 1, wherein after entering the heating state, the slow rising of the stored water in the heat exchanger by the static heating method with small firepower comprises: in the static heating anti-freezing mode, after the heating state is entered, the controller limits the maximum gas opening of the gas control valve, and a small-firepower static heating mode is adopted to slowly rise the stored water in the heat exchanger so as to prevent the stored water from locally overheating and boiling to generate abnormal sound.
7. The anti-freezing method for the water heater as claimed in claim 1, wherein when the temperature in the heat exchange pipe is detected to be higher than the anti-freezing warning temperature, the water heater is switched off, heating is stopped, and the water heater is switched to the standby state, and the method comprises the following steps: and when the temperature in the heat exchange pipe measured by the anti-freezing temperature probe is higher than the anti-freezing warning temperature, the water stored in the heat exchanger is heated, the static heating anti-freezing mode is exited, the water heater is turned off, and the standby state is switched.
8. The antifreeze method for water heater according to claim 7, wherein when the temperature of the water stored in the heat exchange pipe is detected to be 15-35 ℃, the water heater is turned off and is switched to the standby state.
9. The method of preventing freezing of a water heater of claim 1, further comprising: in the small-fire static heating, if an external hot water outlet valve is opened and the detected water flow is more than or equal to the starting flow, the static heating is switched to a shower starting mode.
10. A water heater using the anti-freezing method as claimed in any one of claims 1 to 9, comprising:
a water heater body (1),
the anti-freezing temperature sensor (2) is arranged on a heat exchange pipe (11) of the water heater body (1) and is connected with a controller (12) of the water heater body (1) so as to detect the temperature of water stored in the heat exchange pipe (11) in real time,
one end of the water return pipe (3) is communicated with the water outlet end of the heat exchange pipe (11), the other end of the water return pipe is communicated with the water inlet end of the heat exchange pipe (11),
a one-way valve (4) mounted on the water return pipe (3) to prevent tap water from entering the water return pipe (3),
the circulating water pump (5) is arranged on a heat exchange pipe (11) of the water heater body (1) and is connected with a controller (12) of the water heater body (1) so as to enable water stored in the heat exchange pipe (11) to circulate in the heat exchange pipe (11) and the water return pipe (3),
and the water flow sensor (6) is arranged on the heat exchange pipe (11) of the water heater body (1) and is connected with the controller (12) of the water heater body (1) so as to detect the water storage flow in the heat exchange pipe (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111004346.5A CN113720021A (en) | 2021-08-30 | 2021-08-30 | Water heater anti-freezing method and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111004346.5A CN113720021A (en) | 2021-08-30 | 2021-08-30 | Water heater anti-freezing method and water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113720021A true CN113720021A (en) | 2021-11-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111004346.5A Withdrawn CN113720021A (en) | 2021-08-30 | 2021-08-30 | Water heater anti-freezing method and water heater |
Country Status (1)
| Country | Link |
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| CN (1) | CN113720021A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484281A (en) * | 2022-01-27 | 2022-05-13 | 江苏格陵兰传热科技有限公司 | Anti-freezing module for circulating pipeline |
-
2021
- 2021-08-30 CN CN202111004346.5A patent/CN113720021A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114484281A (en) * | 2022-01-27 | 2022-05-13 | 江苏格陵兰传热科技有限公司 | Anti-freezing module for circulating pipeline |
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Application publication date: 20211130 |