CN209944770U - Anti-freezing gas water heater - Google Patents
Anti-freezing gas water heater Download PDFInfo
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- CN209944770U CN209944770U CN201920525802.2U CN201920525802U CN209944770U CN 209944770 U CN209944770 U CN 209944770U CN 201920525802 U CN201920525802 U CN 201920525802U CN 209944770 U CN209944770 U CN 209944770U
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Abstract
The utility model relates to a gas heater technical field discloses a gas heater prevents frostbite, and it includes: a housing; the controller, the heat exchanger, the fan and the combustion device are arranged on the shell; the first temperature sensor is used for detecting the temperature of the heat exchanger, and the second temperature sensor is used for detecting the ambient temperature; the heat exchanger, the fan, the combustion device, the first temperature sensor and the second temperature sensor are all electrically connected with the controller; the utility model has the advantages that: the anti-freezing method of the fan and combustion combination is adopted, an electric heating anti-freezing device is not needed to be additionally arranged, and only the temperature sensor for acquiring the temperature of the heat exchanger and the ambient temperature is needed to be arranged on the shell of the water heater, so that the pipeline in the water heater can be effectively prevented from freezing, the structure is simple, the energy can be saved, and the anti-freezing cost is reduced.
Description
Technical Field
The utility model relates to a gas heater technical field especially relates to a gas heater prevents frostbite.
Background
In northern areas, outdoor temperature is lower in winter, cold air easily enters the water heater through the flue and exchanges heat with residual water in the pipeline because the flue of the forced-ventilated type gas water heater is in the same direction outdoors, and when the temperature of the residual water in the pipeline is lower than 0 ℃, the pipeline has the risk of frost crack.
In the existing anti-freezing measures of the gas water heater, the heat anti-freezing application of the motor is more, and the electric heating anti-freezing is realized by installing an electric heating device near a heat exchanger and controlling the electric heating device through commercial power; however, the adoption of electric heating for freezing prevention can consume more electric energy, so that the cost is higher, the heating is not uniform, the reliability is not guaranteed, and certain potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, providing a gas heater prevents frostbite, it is effectual to prevent frostbite, and prevents frostbite low cost.
In order to achieve the above object, the utility model provides an anti-freezing gas water heater, it includes: a housing;
the controller, the heat exchanger, the fan and the combustion device are arranged on the shell;
the first temperature sensor is used for detecting the temperature of the heat exchanger, and the second temperature sensor is used for detecting the ambient temperature;
the heat exchanger, the fan, the combustion device, the first temperature sensor and the second temperature sensor are all electrically connected with the controller.
Preferably, the gas water heater further comprises a water flow sensor for detecting the water flow at the water inlet of the gas water heater, and the water flow sensor is electrically connected with the controller.
Preferably, the temperature sensor further comprises a water outlet nozzle connected to the water outlet pipeline of the heat exchanger, and the temperature probe of the second temperature sensor extends into the water outlet nozzle.
Preferably, the probe of the second temperature sensor extends outside the housing.
Preferably, the probe of the first temperature sensor is in contact with the outer wall of the heat exchanger or extends into the pipe wall of the heat exchanger.
Preferably, the fan is a direct current fan or an alternating current fan.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the gas water heater has the advantages that only the first temperature sensor and the second temperature sensor are needed to be installed on the shell of the water heater and are respectively used for detecting the temperature of the heat exchanger and the temperature of the environment, the structure of the gas water heater is simple, the fan and combustion combined anti-freezing method is adopted, when the environment temperature is high, the heat of indoor warm air can be used for freezing prevention, energy is saved, the environment is protected, when the environment temperature is low, combustion anti-freezing can be adopted, and the phenomenon that the pipeline of the gas water heater is frozen and cracked when the temperature is low in winter can be; and because an electric heating anti-freezing device is not required to be additionally arranged on the gas water heater, electric energy can be saved, and anti-freezing cost is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an anti-freezing gas water heater according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating an anti-freezing method for a gas water heater according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a gas water heater after being powered on according to an embodiment of the present invention;
fig. 4 is a flow chart illustrating another anti-freezing method for a gas water heater according to an embodiment of the present invention.
In the figure, 10, the housing; 20. a controller; 30. a heat exchanger; 40. a fan; 50. a combustion device; 60. a first temperature sensor; 70. a second temperature sensor; 80. a water flow sensor; 90. a water outlet nozzle.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "first", "second", and the like are used in the present invention to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
As shown in fig. 1, a first aspect of the embodiments of the present invention provides an anti-freezing gas water heater, which includes: the temperature control device comprises a shell 10, a controller 20, a heat exchanger 30, a fan 40, a combustion device 50, a first temperature sensor 60 for detecting the temperature of the heat exchanger 30 and a second temperature sensor 70 for detecting the ambient temperature;
the heat exchanger 30, the fan 40, the combustion device 50, the first temperature sensor 60 and the second temperature sensor 70 are all electrically connected to the controller 20, the heat exchanger 30, the fan 40 and the combustion device 50 are all mounted on the housing 10, and the first temperature sensor 60 is mounted on the heat exchanger 30.
Based on the structure of the anti-freezing gas water heater, the first temperature sensor 60 is used for acquiring the temperature of the heat exchanger, and when the temperature of the heat exchanger is lower than a preset first anti-freezing threshold value, anti-freezing measures are required; the second temperature sensor 70 is used for acquiring the ambient temperature, and when the ambient temperature is higher than a preset warm air anti-freezing threshold value, the fan 40 can be started to pump indoor warm air into the water heater so as to exchange heat with residual water in the pipeline, so that the residual water can be prevented from freezing in the pipeline, air is discharged from the flue, and the flue blockage caused by backflow of outdoor cold air can be avoided; when the fan 40 is not operated enough to prevent freezing, the combustion device 50 is turned on to prevent freezing.
Illustratively, the fan 40 is located above the heat exchanger 30 or below the combustion device 50, the combustion device 50 is located below the heat exchanger 30, and the combustion device 50 includes a plurality of fire rows.
The anti-freezing mode is only performed in the non-bathing mode, the anti-freezing gas water heater further comprises a water flow sensor 80 for detecting the water flow at the water inlet of the heat exchanger 30, the water flow sensor 80 is electrically connected with the controller 20, and the controller 20 judges whether the water flow of the pipeline is greater than a preset water flow threshold value or not through the water flow sensor 80; when the water flow is larger than a preset water flow threshold value, the user starts the water heater for bathing, and the bathing mode is entered; and when the water flow is smaller than the preset water flow threshold value, the water heater is in a standby state and enters an anti-freezing mode.
In this embodiment, the anti-freezing gas water heater further includes a water outlet nozzle 90 connected to the water outlet pipeline of the heat exchanger 30, since the water outlet nozzle 90 is made of copper material, the heat transfer is fast, the second temperature sensor 70 can be installed on the water outlet nozzle 90, the temperature in the water outlet nozzle 90 approximately represents the ambient temperature, and at this time, the temperature probe of the second temperature sensor 70 is extended into the water outlet nozzle 90.
As an alternative to the above, the ambient temperature can also be detected directly by the second temperature sensor 70, i.e. by extending the probe of the second temperature sensor 70 outside the housing 10.
In this embodiment, the probe of the first temperature sensor 60 is in contact with the outer wall of the heat exchanger 30 or directly extends into the inner wall of the heat exchanger 30 to detect the temperature of the heat exchanger 30.
Specifically, the fan 40 in this embodiment may be a direct current fan or an alternating current fan.
In a similar object, a second aspect of the preferred embodiment of the present invention further provides an anti-freezing method for a gas water heater, specifically referring to fig. 2-4, which comprises the following steps:
s10, acquiring the temperature of the heat exchanger in the anti-freezing mode and the ambient temperature of the gas water heater;
s20, judging whether the temperature of the heat exchanger is lower than a preset first anti-freezing threshold value or not; when the temperature of the heat exchanger is lower than a preset first anti-freezing threshold value, the risk that a water heater pipeline is frozen is indicated, and a fan is started at the moment; if the temperature of the heat exchanger is greater than a preset first anti-freezing threshold value, the icing risk is not present, and the fan does not need to be started at the moment and is kept in a standby state;
s30, judging whether the environment temperature is larger than a preset warm air anti-freezing threshold value; if yes, entering a warm air anti-freezing mode; if not, starting the combustion device, and entering a combustion anti-freezing mode; it should be noted that, in the combustion freeze-proof mode, the combustion apparatus is operated at a minimum load;
wherein the warm air anti-freezing threshold value is greater than the first anti-freezing threshold value.
Exemplarily, in the present embodiment, the first freeze protection threshold needs to be set to be greater than 0 ℃, and specifically, may be set to be 1 ℃ to 5 ℃; the warm air anti-freezing threshold is set to be 10-15 ℃.
In view of the above, the working condition of indoor and outdoor temperature difference in winter in the north is fully considered, and the warm air anti-freezing mode and the combustion anti-freezing mode are combined, in the anti-freezing mode, when the environment temperature is higher due to the arrangement of the heater, indoor warm air is extracted by the fan to enter the gas water heater to exchange heat with the heat exchange tube, and low-temperature residual water in the pipeline is heated, so that the residual water in the pipeline can be prevented from freezing, the air after heat exchange is exhausted out of the room through the smoke tube, and meanwhile, cold air outside the room can be prevented from flowing backwards; when the ambient temperature is not enough to prevent the residual water in the pipeline from freezing, the combustion device is started to burn, and the pipeline is ensured not to freeze by using the combustion heat; in the embodiment, the combination of warm air freeze protection and combustion freeze protection can ensure that the pipeline is not frozen and cracked, save energy and reduce cost.
Further, since the flue may be blocked due to the change of the outdoor wind pressure, before determining whether the ambient temperature is lower than the preset warm air anti-freezing threshold, the method further includes the following steps:
judging whether the flue is blocked; if the flue is blocked, the fan is closed, and information of a freezing alarm is output to remind a user of adopting manual drainage anti-freezing operation; and if the blockage does not occur, judging whether the environmental temperature is lower than a preset warm air anti-freezing threshold value or not, and further selecting a warm air anti-freezing mode or a combustion anti-freezing mode.
In this embodiment, a specific method for determining whether the flue is blocked is as follows: whether the rotating speed of the fan is larger than a preset reference rotating speed or not is detected, and if the rotating speed of the fan is larger than the preset reference rotating speed, the flue is judged to be blocked.
In this embodiment, specifically, in the warm air anti-freezing mode, after the temperature of the heat exchanger is heated to be greater than or equal to a preset first target temperature value through the work of a fan, the fan is turned off;
in the combustion anti-freezing mode, the heat exchanger is heated to a temperature greater than or equal to a preset second target temperature value through the work of a combustion device, and then the fan and the combustion device are turned off;
wherein the first target temperature value and the second target temperature value are both greater than the first freeze protection threshold value.
Illustratively, the first target temperature value is set to 10-12 ℃ and the second target temperature is set to 15-22 ℃.
In this embodiment, in order to ensure that the pipeline can be prevented from freezing by preventing the warm air from freezing, the warm air freezing prevention method specifically includes the following steps:
judging whether the temperature of the heat exchanger is smaller than a preset second anti-freezing threshold value within a preset time T1;
if yes, entering a combustion anti-freezing mode; if not, continuing the warm air anti-freezing mode and judging whether the temperature rising rate of the heat exchanger is smaller than a preset first temperature rising rate value within the time T1;
if yes, entering a combustion anti-freezing mode; if not, continuing the warm air anti-freezing mode and judging whether the temperature rising rate of the heat exchanger is smaller than a preset second temperature rising rate value within the preset T2 time;
if yes, entering a combustion anti-freezing mode; if not, continuing the warm air anti-freezing mode and judging whether the temperature of the heat exchanger is greater than the first target temperature value within the time T2;
if so, closing the fan and ending the warm air anti-freezing mode; if not, entering a combustion anti-freezing mode;
wherein the second freeze protection threshold is less than the first freeze protection threshold, the T2 is greater than the T1, and the second rate of temperature rise value is greater than the first rate of temperature rise value.
For example, T1 can be set to 10-30 s, and T2 can be set to 1-3 min.
Specifically, in the present embodiment, in the combustion antifreeze mode, the following steps are specifically included:
judging whether the temperature of the heat exchanger is greater than the second target temperature value within the time T3 preset by starting the combustion device;
if yes, the combustion device and the fan are closed; if not, the combustion device and the fan are closed, and meanwhile, anti-freezing early warning information is output, so that a user is reminded of adopting manual drainage anti-freezing operation.
For example, in the embodiment, in the combustion freeze-proofing mode, the combustion mode of the combustion device may be continuous or intermittent; the continuous combustion mode is to start the combustion device until the temperature of the heat exchanger reaches a second target temperature value; the intermittent combustion mode is that the combustion device is started for a period of time, then the combustion device is closed, and then the combustion device is started for a period of time, and the process is repeated until the temperature of the heat exchanger reaches a second target temperature value.
In an exemplary embodiment, in the combustion anti-freezing mode, after the combustion device is turned on, it is first required to determine whether the flame feedback needle has a current, that is, to detect whether the combustion device is ignited successfully, and if no current exists, the fan and the combustion device are required to be turned off, and information of a freeze warning is output; if the current exists, whether the temperature of the heat exchanger reaches a preset second target temperature value within a preset time T3 needs to be further judged.
Illustratively, T3 can be set to 5-15 s
In this embodiment, the anti-freezing mode is only performed in the non-bathing mode, and therefore, after the gas water heater is powered on and enters the standby mode, the current water flow of the pipeline of the gas water heater needs to be acquired in real time;
judging whether the current water flow value is larger than a preset water flow threshold value or not;
if the current water flow value is larger than a preset water flow threshold value, entering a shower mode; if not, keeping the standby mode, and performing anti-freezing in the standby mode; refer specifically to FIG. 3.
To sum up, the embodiment of the utility model provides an anti-freezing gas water heater, adopt fan and combustion combination to prevent frostbite, when the ambient temperature that gas water heater is located is higher, can utilize the fan to extract indoor warm air and the surplus water heat transfer in the pipeline is prevented frostbite, and energy-concerving and environment-protective, and the air after the heat transfer is discharged outdoors through the flue, can prevent that outdoor cold air from flowing backward and causing the flue to block up; when the environment temperature of the gas water heater is low and not enough to prevent freezing, the combustion device is started to combust and prevent freezing, the electric heating anti-freezing device does not need to be additionally arranged, freezing can be effectively prevented, the anti-freezing cost can be reduced, and the structure of the gas water heater is simple.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (6)
1. An anti-freeze gas water heater, comprising:
a housing (10);
the controller (20), the heat exchanger (30), the fan (40) and the combustion device (50) are mounted on the shell (10);
a first temperature sensor (60) for detecting the temperature of the heat exchanger (30) and a second temperature sensor (70) for detecting the ambient temperature;
wherein the heat exchanger (30), the fan (40), the combustion device (50), the first temperature sensor (60) and the second temperature sensor (70) are all electrically connected with the controller (20).
2. The antifreeze gas water heater of claim 1, further comprising a water flow sensor (80) for detecting a water flow at a water inlet of said gas water heater, said water flow sensor (80) being electrically connected to said controller (20).
3. The antifreeze gas water heater of claim 1, further comprising a water outlet nozzle (90) connected to a water outlet line of said heat exchanger (30), wherein a temperature probe of said second temperature sensor (70) extends into said water outlet nozzle (90).
4. Anti-freeze gas water heater according to claim 1, characterised in that the probe of said second temperature sensor (70) protrudes outside said casing (10).
5. Anti-freeze gas water heater according to claim 1, characterized in that the probe of said first temperature sensor (60) is in contact with the outer wall of said heat exchanger (30) or protrudes inside the wall of said heat exchanger (30).
6. Anti-freeze gas water heater according to any of the claims 1 to 5, characterised in that said fan (40) is a DC fan or an AC fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920525802.2U CN209944770U (en) | 2019-04-17 | 2019-04-17 | Anti-freezing gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920525802.2U CN209944770U (en) | 2019-04-17 | 2019-04-17 | Anti-freezing gas water heater |
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| CN209944770U true CN209944770U (en) | 2020-01-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990486A (en) * | 2019-04-17 | 2019-07-09 | 广东万和新电气股份有限公司 | The antifreeze method and anti-freezing gas water heater of gas heater |
| CN111351119A (en) * | 2020-03-02 | 2020-06-30 | 中山市力科电器有限公司 | Intelligent zero-cold-water wall-mounted boiler and intelligent control method |
| CN114459159A (en) * | 2022-01-20 | 2022-05-10 | 广东万和新电气股份有限公司 | Water heater and anti-freezing control method thereof |
-
2019
- 2019-04-17 CN CN201920525802.2U patent/CN209944770U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990486A (en) * | 2019-04-17 | 2019-07-09 | 广东万和新电气股份有限公司 | The antifreeze method and anti-freezing gas water heater of gas heater |
| CN111351119A (en) * | 2020-03-02 | 2020-06-30 | 中山市力科电器有限公司 | Intelligent zero-cold-water wall-mounted boiler and intelligent control method |
| CN111351119B (en) * | 2020-03-02 | 2021-07-23 | 中山市力科电器有限公司 | Intelligent zero-cold-water wall-mounted boiler and intelligent control method |
| CN114459159A (en) * | 2022-01-20 | 2022-05-10 | 广东万和新电气股份有限公司 | Water heater and anti-freezing control method thereof |
| CN114459159B (en) * | 2022-01-20 | 2024-03-12 | 广东万和新电气股份有限公司 | Water heater and anti-freezing control method thereof |
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