CN107401840B - Water heater and detection device and method for checking position of temperature sensing bulb of water tank - Google Patents
Water heater and detection device and method for checking position of temperature sensing bulb of water tank Download PDFInfo
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- CN107401840B CN107401840B CN201710618910.XA CN201710618910A CN107401840B CN 107401840 B CN107401840 B CN 107401840B CN 201710618910 A CN201710618910 A CN 201710618910A CN 107401840 B CN107401840 B CN 107401840B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 253
- 238000001514 detection method Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title description 14
- 230000002159 abnormal effect Effects 0.000 claims abstract description 39
- 238000009434 installation Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000011897 real-time detection Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a detection method for checking the position of a temperature sensing bulb of a water tank, which comprises the following steps: acquiring the detection temperature T2 of the temperature sensing bulb of the water tank; acquiring an external environment temperature T1; when the difference value between T1 and T2 is not greater than the preset temperature delta T value; acquiring the temperature T3 of the water outlet side of the water tank, wherein the position of a temperature sensing bulb of the water tank is abnormal when T2< T3; or acquiring the temperature T4 of the water inlet side of the water tank, wherein when the temperature T2> T4, the position of the temperature sensing bulb of the water tank is abnormal; or the temperature T3 of the water outlet side of the water tank and the temperature T4 of the water inlet side of the water tank, and the position of the temperature sensing bulb of the water tank is abnormal when T2< T3 or T2> T4. Whether the position of the water tank temperature sensing bulb is abnormal or not can be judged through the detection steps, so that abnormal shutdown is prevented, and normal use is guaranteed. The invention also discloses a detection device for checking the position of the temperature sensing bulb of the water tank and a water heater with the detection device for checking the position of the temperature sensing bulb of the water tank.
Description
Technical Field
The invention relates to the technical field of air energy water heaters, in particular to a water heater and a detection device and method for checking the position of a temperature sensing bulb of a water tank of the water heater.
Background
With the emphasis of the country on environmental protection, the air energy water heater is more widely applied to heating, hot water and other places, and meanwhile, users have higher requirements on energy conservation and reliability of the air energy water heater.
The heat pump water heater mostly adopts the water tank temperature sensing bulb to carry out real-time detection of the water tank temperature, and carries out start-stop of the unit by acquiring the water tank temperature. In the use of unit, because improper installation or misuse, the water tank temperature sensing package position can take place unusually, leads to the unable normal use of unit.
Therefore, the technical problem to be solved by the technical personnel in the field is to provide a detection method for detecting the position of the temperature-sensing bulb of the water tank so as to ensure the normal use of the unit.
Disclosure of Invention
In view of this, the present invention provides a method for detecting a position of a thermal bulb of a water tank, so as to ensure normal use of a unit. The invention also provides a detection device for detecting the position of the temperature sensing bulb of the water tank and the water heater with the detection device for detecting the position of the temperature sensing bulb of the water tank.
In order to achieve the purpose, the invention provides the following technical scheme:
a detection method for checking the position of a temperature sensing bulb of a water tank comprises the following steps:
acquiring the detection temperature T2 of the temperature sensing bulb of the water tank;
acquiring an external environment temperature T1;
when the difference between T1 and T2 is not greater than the predetermined temperature deltat,
acquiring the temperature T3 of the water outlet side of the water tank, wherein the position of a temperature sensing bulb of the water tank is abnormal when T2< T3; or acquiring the temperature T4 of the water inlet side of the water tank, wherein when the temperature T2> T4, the position of the temperature sensing bulb of the water tank is abnormal; or the temperature T3 of the water outlet side of the water tank and the temperature T4 of the water inlet side of the water tank, and the position of the temperature sensing bulb of the water tank is abnormal when T2< T3 or T2> T4.
Preferably, in the above detection method, the preset temperature value Δ T is 2 ℃ to 5 ℃.
Preferably, in the above detection method, after the position of the water tank bulb is abnormal, the method further includes: alarm failure and/or unit shutdown.
Preferably, in the above detection method, the outlet side temperature T3 of the water tank is the temperature of the inlet water of the heat exchanger connected to the outlet side of the water tank, and the inlet side temperature of the water tank is the temperature of the outlet water of the heat exchanger connected to the inlet side of the water tank.
A detection device for verifying the position of a water tank thermal bulb is used for verifying the detection temperature T2 of the water tank thermal bulb, and comprises:
acquiring an environment temperature sensing bulb of an external environment temperature T1;
the temperature control method comprises the following steps of obtaining a first temperature sensing bulb of the water outlet side temperature T3 of a water tank and obtaining a second temperature sensing bulb of the water inlet side temperature T4 of the water tank;
and the comparison module is used for comparing the difference value of T1 and T2 with the preset temperature delta T and comparing the difference values of T2 and T3 and T2 and T4, and when the difference value of T1 and T2 is not larger than the preset temperature delta T value and T2< T3 or T2 acquired by the first temperature sensing bulb > T4 acquired by the second temperature sensing bulb, the position of the water tank temperature sensing bulb is abnormal.
Preferably, the detection device further includes an alarm device, the alarm device is in signal connection with the comparison module, and when the difference between T1 and T2 is not greater than a preset temperature Δ T value, and T2< T3 or T2 acquired by the first bulb > T4 acquired by the second bulb, the alarm device gives an alarm.
Preferably, the detection device further includes a control device, the comparison module is in signal connection with the alarm device through the control device, and when the difference between T1 and T2 is not greater than a preset temperature Δ T value, and T2< T3 or T2 acquired by the first thermal bulb > T4 acquired by the second thermal bulb, the comparison module controls the alarm device to turn on an alarm through the control device.
Preferably, in the above detection apparatus, the first thermal bulb is installed on a pipeline communicating a water outlet of the water tank and a water inlet of the heat exchanger.
Preferably, in the above detection apparatus, the second thermal bulb is installed on a pipeline communicating a water inlet of the water tank and a water outlet of the heat exchanger.
A water heater comprises a water tank temperature sensing bulb in a water tank, and the water heater further comprises a detection device for checking the position of the water tank temperature sensing bulb.
According to the technical scheme, the invention discloses a detection method for checking the position of a temperature sensing bulb of a water tank, which comprises the following steps: acquiring the detection temperature T2 of the temperature sensing bulb of the water tank; acquiring an external environment temperature T1; when the difference value between T1 and T2 is not greater than the preset temperature delta T value; acquiring the temperature T3 of the water outlet side of the water tank, wherein the position of a temperature sensing bulb of the water tank is abnormal when T2< T3; or acquiring the temperature T4 of the water inlet side of the water tank, wherein when the temperature T2> T4, the position of the temperature sensing bulb of the water tank is abnormal; or the temperature T3 of the water outlet side of the water tank and the temperature T4 of the water inlet side of the water tank, and the position of the temperature sensing bulb of the water tank is abnormal when T2< T3 or T2> T4. Whether the position of the water tank temperature sensing bulb is abnormal or not can be judged through the detection steps, so that abnormal shutdown is prevented, and normal use is guaranteed.
In addition, the application also discloses a detection device for checking the position of the temperature sensing bulb of the water tank, the application judges the size of the difference value between T1 and T2 and the preset temperature delta T, the size of T2 and T3 and the size of T2 and T4 by adding the environment temperature sensing bulb for acquiring the outside environment temperature T1, the first temperature sensing bulb for acquiring the water inlet temperature T3 of the heat exchanger and/or the second temperature sensing bulb for acquiring the water outlet temperature T4 of the heat exchanger through a comparison module, and the position of the temperature sensing bulb of the water tank is abnormal when the difference value between T1 and T2 is not larger than the preset temperature delta T value and T2< T3 or T2 acquired by the first temperature sensing bulb > and T4 acquired by the second temperature sensing bulb. The structure is added on the existing unit, so that the position of the water tank temperature sensing bulb can be checked, the unit halt caused by the position error of the water tank temperature sensing bulb is prevented, and the normal starting is ensured.
In addition, this application still discloses a hot water machine, because it has used above-mentioned detection device who verifies water tank temperature sensing package position, consequently, the hot water machine also can prevent the unit that water tank temperature sensing package position error leads to and shut down, guarantees normal use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a water tank provided by an embodiment of the invention;
FIG. 2 is a schematic view of an installation structure of a detection device for detecting a position of a thermal bulb of a water tank according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting a position of a thermal bulb of a water tank according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a detection method for detecting the position of a temperature-sensing bulb of a water tank so as to ensure the normal use of a unit. The invention also provides a detection device for detecting the position of the water tank thermal bulb and a hot water machine with the detection device for detecting the position of the water tank thermal bulb.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIG. 3, the invention discloses a detection method for checking the position of a temperature sensing bulb of a water tank, which comprises the following steps:
step S1: the detection temperature T2 of the temperature sensing bulb of the water tank is obtained, the external environment temperature T1 is obtained, and the water outlet side temperature T3 of the water tank and/or the water inlet side temperature T4 of the water tank are obtained.
Increase the temperature of external environment and the play water side temperature of water tank and the side temperature of intaking of water tank in this application to whether the temperature that detects of water tank temperature sensing package is unusual through these temperatures determination, and judge whether the water tank position is unusual.
The basis of the method lies in that whether the temperature sensing bulb position is normal or not is judged on the premise that the unit normally works. When the unit is normal, the temperature of the water inlet side of the water tank is higher than that of the water outlet side. When the unit normally works, the unit is started when the temperature of the water tank is less than or equal to the circulating set temperature T, and in the process, if the position of the temperature sensing bulb of the water tank is abnormal, the unit may be stopped and cannot be normally heated. When the temperature of the water tank is larger than or equal to the circulating set temperature T + delta T, the unit is in a shutdown state, so that the abnormal shutdown process does not exist, namely the temperature of the water tank is higher in the process, the temperature difference between the water tank and the external environment is larger, the unit does not have the problem of no heating at the moment, namely the unit is normally started, and therefore the abnormal shutdown when the difference between the temperature of the water tank and the external temperature is smaller is only considered here.
Step S2: when the difference value between the T1 and the T2 is not larger than the preset temperature value delta T, and T2< the acquired T3 or T2> acquired T4, the position of the temperature sensing bulb of the water tank is abnormal.
Because the water tank is connected with the heat exchanger, the water outlet pipe of the heat exchanger is communicated with the water inlet of the water tank, and the water inlet pipe of the heat exchanger is communicated with the water outlet of the water tank. According to the working principle of the water heater, the temperature of the water outlet pipe of the heat exchanger (namely the water inlet side temperature T4 of the water tank) should be higher than the temperature of the water inlet pipe (namely the water outlet side temperature T3 of the water tank), the temperature of the water outlet pipe (namely the water inlet side temperature T4 of the water tank) is lower than the temperature in the water tank (namely the detected temperature T2 of the temperature sensing bulb of the water tank), and the temperature in the water tank (namely the detected temperature T2 of the temperature sensing bulb of the water tank) is higher than the temperature of the water inlet pipe of the heat exchanger (namely the water outlet side temperature. In summary, preferably, the outlet side temperature T3 of the tank is the temperature of the inlet water of the heat exchanger connected to the outlet side of the tank and the inlet side temperature of the tank is the temperature of the outlet water of the heat exchanger connected to the inlet side of the tank.
Therefore, when the | T1-T2| is less than or equal to the Δ T, and T2< T3 or T2> T4, namely the temperature of the water tank is smaller than the temperature of the external environment, and the temperature of the water tank is lower than the temperature of the water outlet side of the water tank or the temperature of the water tank is higher than the temperature of the water inlet side of the water tank, the abnormal position of the temperature sensing bulb of the water tank in the water tank is indicated, and the treatment is needed.
Whether the position of the water tank temperature sensing bulb is abnormal or not can be judged through the detection steps, so that abnormal shutdown is prevented, and normal startup is guaranteed.
The method specifically comprises the following steps: only the temperature T4 of the water inlet side of the water tank can be detected, and when the difference value between T1 and T2 is not larger than the preset temperature value delta T and T2> acquired T4, the position of the temperature sensing bulb of the water tank is abnormal. It is also possible to detect only the temperature T3 of the outlet side of the water tank, and when the difference between T1 and T2 is not greater than the preset temperature value Δ T and T2< acquired T3, the bulb position of the water tank is abnormal.
When only obtaining the condition of one of them position of water tank, can only detect the condition of a section temperature of water tank, the preferred mode is that the temperature of the side of intaking and the side of play water temperature of water tank is obtained constantly to the comparison, in order to guarantee to detect the accuracy.
And simultaneously acquiring the temperature T4 of the water inlet side of the water tank and the temperature T3 of the water outlet side of the water tank, wherein when the difference value between T1 and T2 is not larger than a preset temperature value delta T, and T2< T3 or T2> acquired T4, the position of the temperature sensing bulb of the water tank is abnormal.
The preset temperature value delta T disclosed in the application is 2-5 ℃, and the value can be set according to different setting requirements and is within a protection range.
Further, after step S2, the method further includes:
step S3: alarm failure and/or unit shutdown.
When the abnormal position of the water tank temperature sensing bulb is detected, an alarm is given out to remind an operator and/or stop the machine to adjust the position of the water tank temperature sensing bulb, so that the machine set can be started normally, and abnormal stop is prevented. When the unit is started, the judgment process is firstly carried out so as to ensure the normal use of the unit.
As shown in fig. 1 and fig. 2, in addition, the present application also discloses a detection device for verifying the position of the water tank thermal bulb, which is used for verifying the detected temperature T2 of the water tank thermal bulb, and further comprises: the temperature-sensing device comprises an ambient temperature bulb 5, a first temperature-sensing bulb 4, a second temperature-sensing bulb 3 and a comparison module.
The environment temperature bulb 5 is used for obtaining the outside environment temperature T1, the first temperature bulb 4 is used for obtaining the temperature T3 of the water outlet side 12 of the water tank 1, and the second temperature bulb 3 is used for obtaining the temperature T4 of the water inlet side 11 of the water tank 1. The comparison module is used for comparing the difference value between T1 and T2 with the preset temperature delta T, comparing the difference values between T2 and T3 and between T2 and T4, and when the difference value between T1 and T2 is not larger than the preset temperature delta T value and T2< T3 or T2> T4, the position of the temperature sensing bulb of the water tank is abnormal.
The temperature checking device has the advantages that the environment temperature bulb 5, the first temperature bulb 4, the second temperature bulb 3 and the comparison module are additionally arranged on the existing unit, so that the temperature of the water tank temperature bulb can be checked, whether the position of the water tank temperature bulb is abnormal or not is determined, the unit halt caused by the position error of the water tank temperature bulb is prevented, and the normal starting is guaranteed. The core of this application lies in the state in order to confirm water tank temperature sensing package position through the temperature that detects water tank temperature sensing package, owing to adopt the temperature sensing package to detect the temperature and carry out the comparison, detects the accuracy, can improve the accuracy to the check-up of water tank temperature sensing package position.
In a specific embodiment, the detection device further comprises an alarm device, the alarm device is in signal connection with the comparison module, and the alarm device gives an alarm when the difference value between T1 and T2 is not greater than a preset temperature delta T value and T2< T3 or T2> T4. The alarm device can be added to conveniently remind an operator of knowing whether the position of the water tank temperature sensing bulb is abnormal or not. The alarm device can be in a light alarm mode or a sound alarm mode, or the light alarm mode and the sound alarm mode are combined, an operator can select the alarm device according to different requirements, and the alarm device and the sound alarm device are all in a protection range.
In a further embodiment, the detection device further comprises a control device, and the comparison module is in signal connection with the alarm device through the control device. When the difference value between the T1 and the T2 is not larger than the preset temperature delta T value and T2< T3 or T2> T4, the comparison module controls the alarm device to conduct alarm through the control device. Automatic control can be realized by adding a control device, and the labor intensity is reduced.
In a further embodiment, when the alarm device is turned on to alarm, the control device controls the unit to stop. The shutdown of the unit is controlled by the control device, so that automation can be further realized, namely, when the abnormal position of the water tank temperature sensing bulb is detected, the control alarm and the shutdown of the unit are informed, and an operator can conveniently adjust the position of the water tank temperature sensing bulb.
The outside at the fan department of unit is installed to ambient temperature bulb 5 disclosed in this application to make things convenient for ambient temperature bulb 5 to acquire external environment's temperature. Specifically, an installation groove may be formed in the housing of the unit to install the ambient temperature bulb 5 in the installation groove.
In a specific embodiment, the first thermal bulb 4 is installed on a pipeline communicating the water outlet side 12 of the water tank 1 with the water inlet of the heat exchanger 2, and the second thermal bulb 3 is installed on a pipeline communicating the water inlet side 11 of the water tank 1 with the water outlet of the heat exchanger. The temperature of the water inlet side and the temperature of the water outlet side of the heat exchanger 2 can be detected through the first temperature sensing bulb 4 and the second temperature sensing bulb 3.
In addition, the device can also be provided with only the first bulb 4 or the second bulb 3, and when the temperature measured by the first bulb 4 meets T2< T3, the position of the water tank bulb is abnormal; when the temperature measured by the second bulb 3 satisfies T2> T4, the position of the water tank bulb is abnormal.
In addition, this application still discloses a hot water machine, including the water tank temperature sensing package in the water tank, still include the detection device of check-up water tank temperature sensing package position, wherein, the detection device of this check-up water tank temperature sensing package position is as the detection device of the check-up water tank temperature sensing package position as disclosed in the above-mentioned embodiment, consequently, the hot water machine that has the detection device of this check-up water tank temperature sensing package position also has all above-mentioned technological effects, and no longer give unnecessary details one by one here.
The water heater is an air energy water heater.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A detection method for checking the position of a temperature sensing bulb of a water tank is characterized by comprising the following steps:
acquiring the detection temperature T2 of the temperature sensing bulb of the water tank;
acquiring an external environment temperature T1;
when the difference between T1 and T2 is not greater than the preset temperature deltat,
acquiring the temperature T3 of the water outlet side of the water tank (1), wherein the position of a temperature sensing bulb of the water tank is abnormal when T2< T3; or acquiring the temperature T4 of the water inlet side of the water tank (1), wherein when T2> T4, the position of the temperature sensing bulb of the water tank is abnormal; or acquiring the water outlet side temperature T3 of the water tank (1) and the water inlet side temperature T4 of the water tank (1), wherein when T2 is less than T3 or T2 is greater than T4, the position of a temperature sensing bulb of the water tank is abnormal;
the preset temperature delta T is 2-5 ℃.
2. The detection method according to claim 1, further comprising, after the position of the water tank bulb is abnormal: alarm failure and/or unit shutdown.
3. The detection method according to claim 1, wherein the temperature T3 on the water outlet side of the water tank (1) is the temperature of the inlet water of the heat exchanger (2) connected to the water outlet side of the water tank (1), and the temperature on the water inlet side of the water tank (1) is the temperature of the outlet water of the heat exchanger (2) connected to the water inlet side of the water tank (1).
4. The utility model provides a detection device of check water tank temperature sensing package position for check water tank temperature sensing package's detection temperature T2, its characterized in that includes:
an environment temperature bulb (5) for acquiring an external environment temperature T1;
a first temperature sensing bulb (4) for obtaining the temperature T3 of the water outlet side of the water tank (1) and/or a second temperature sensing bulb (3) for obtaining the temperature T4 of the water inlet side of the water tank (1);
a comparison module for comparing the difference between T1 and T2 with a preset temperature delta T and comparing the difference between T2 and T3 and the difference between T2 and T4, wherein when the difference between T1 and T2 is not greater than the preset temperature delta T and T2< T3 or T2 acquired by the first temperature sensing bulb (4 > T4 acquired by the second temperature sensing bulb (3), the position of the water tank temperature sensing bulb is abnormal;
the preset temperature delta T is 2-5 ℃.
5. The detection device according to claim 4, further comprising an alarm device in signal connection with the comparison module, wherein the alarm device alarms when the difference between T1 and T2 is not greater than a preset temperature Δ T and T2< T3 or T2 acquired by the first thermal bulb (4) > T4 acquired by the second thermal bulb (3).
6. The detection device according to claim 5, further comprising a control device, wherein the comparison module is in signal connection with the alarm device through the control device, and when the difference between T1 and T2 is not greater than a preset temperature Δ T, and T2< T3 or T2 acquired by the first thermal bulb (4) > T4 acquired by the second thermal bulb (3), the comparison module controls the alarm device to turn on an alarm through the control device.
7. The detection device according to claim 4, wherein the first thermal bulb (4) is mounted on a pipeline communicating the water outlet of the water tank (1) with the water inlet of the heat exchanger (2).
8. The detection device according to claim 4, wherein the second thermal bulb (3) is mounted on a pipeline communicating the water inlet of the water tank (1) with the water outlet of the heat exchanger (2).
9. A water heater comprising a tank bulb in a tank, characterized in that it further comprises a detection device for verifying the position of the tank bulb as claimed in any one of claims 4 to 8.
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| CN201710618910.XA CN107401840B (en) | 2017-07-26 | 2017-07-26 | Water heater and detection device and method for checking position of temperature sensing bulb of water tank |
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| CN201710618910.XA CN107401840B (en) | 2017-07-26 | 2017-07-26 | Water heater and detection device and method for checking position of temperature sensing bulb of water tank |
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| CN110411056B (en) * | 2019-08-09 | 2020-10-30 | 珠海格力电器股份有限公司 | Method for judging and processing looseness of temperature sensing bulb of water tank of heat pump unit |
| CN110987240B (en) * | 2019-12-23 | 2021-01-15 | 珠海格力电器股份有限公司 | Fault detection method and device for outer machine temperature sensing bulb and air conditioning unit |
| CN114754464B (en) * | 2022-04-18 | 2023-11-24 | 青岛海尔空调电子有限公司 | Air conditioner control method, system, device, medium and air conditioner |
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| CN105674561A (en) * | 2016-03-16 | 2016-06-15 | 广东万和电气有限公司 | Heat pump water heater and control method thereof |
| CN106766215A (en) * | 2016-11-14 | 2017-05-31 | 广东美的暖通设备有限公司 | The temperature sensor monitors method and apparatus of water tank, hot-water heating system |
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