CN110081605B - Exhaust safety detection method of water heater - Google Patents
Exhaust safety detection method of water heater Download PDFInfo
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- CN110081605B CN110081605B CN201910155388.5A CN201910155388A CN110081605B CN 110081605 B CN110081605 B CN 110081605B CN 201910155388 A CN201910155388 A CN 201910155388A CN 110081605 B CN110081605 B CN 110081605B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 164
- 238000001514 detection method Methods 0.000 title abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 31
- 238000003860 storage Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 description 8
- 230000032683 aging Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 208000003443 Unconsciousness Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention provides an exhaust safety detection method of a water heater, the water heater comprises a blower and a burner, the method is executed when the burner burns gas, and the method comprises the following steps: A. controlling the rotating speed of a motor of the blower and the gas flow supplied to the burner according to a set water temperature, and detecting the rotating speed value of the motor and performing preset expansion after the water outlet temperature of the water heater reaches a constant temperature range corresponding to the set water temperature so as to form an allowable rotating speed range; B. detecting the rotating speed value of a motor of the blower, and comparing whether the detected rotating speed value exceeds the allowable rotating speed range; if so, stopping supplying the gas to the burner. The invention can take the actual installation state of the exhaust pipe as the comparison reference, and increase the accuracy of the detection result.
Description
This application is a divisional application, the application number of the parent: 201510730884.0, filing date: 11/2/2015, title: an exhaust safety detection method for a water heater.
Technical Field
The invention relates to a gas water heater; in particular to an exhaust safety detection method of a water heater.
Background
The water heater which discharges waste gas by adopting a natural convection mode often cannot discharge carbon monoxide generated in incomplete combustion outdoors due to too slow air circulation, so that indoor personnel can easily inhale carbon monoxide due to unconsciousness, when people inhale too much carbon monoxide, human tissues are lack of oxygen to generate discomfort, and even more, the people have the danger of death.
In order to prevent the above situation, the industry has developed a forced air supply type water heater, which uses a blower to provide combustion-supporting air and increase air circulation inside the water heater, so as to provide a large amount of air to improve the heating efficiency of the burner, thereby providing a better heating effect for the water heater, and discharging carbon monoxide generated by incomplete combustion to the outside through an exhaust pipe.
However, when the blower inside the forced air supply type water heater is aged or the exhaust pipe is seriously blocked, the forced air supply type water heater will reduce the air circulation efficiency inside the forced air supply type water heater, thereby increasing the probability of generating carbon monoxide. However, the user is not aware of the danger when using the forced air type water heater because the user thinks that the use of the forced air type water heater is safe and safe.
The existing exhaust safety detection method applied to the forced air supply type water heater judges the situation of exhaust pipe blockage or air blower aging by detecting the rotating speed value of a motor of the air blower, and takes a pre-stored rotating speed range as a detection reference and compares the rotating speed value of the motor with the rotating speed range. When the motor rotation speed value is higher than the upper limit of the rotation speed range, the exhaust pipe is judged to be blocked, and when the motor rotation speed value is lower than the lower limit of the rotation speed range, the blower is judged to be aged.
Although the existing exhaust safety detection method can improve the use safety of the water heater, the existing exhaust safety detection method still has the use limitation. In practical use, the exhaust pipe connected to the water heater is often longer or bent more, so that when the installation of the water heater is completed, the back pressure of the exhaust gas is higher at the beginning, and the initial rotating speed value of the motor is higher. Therefore, if wind flows into the exhaust pipe outdoors or the exhaust pipe is slightly shielded, the rotating speed value of the motor is easily higher than the upper limit of the rotating speed range, and the exhaust pipe is judged to be seriously blocked by mistake.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method for detecting safety of exhaust gas from a water heater, which can accurately detect whether the exhaust gas state of the water heater is normal or not according to different installation states of the exhaust pipe.
In order to achieve the above object, the present invention provides a method for detecting exhaust safety of a water heater, the water heater including a blower and a burner, the method comprising the steps of: A. starting the air blower, and detecting the rotating speed value of a motor of the air blower after the air blower is started for a period of time; B. performing a predetermined expansion according to the rotation speed value detected in the step A to form a first allowable rotation speed range; C. after the water heater stops operating, when the water heater is started again, the blower is started, and after the blower is started for a period of time, the rotating speed value of a motor of the blower is detected; D. comparing whether the rotation speed value detected in the step C is within the first allowable rotation speed range; if yes, supplying gas to the burner for burning.
The invention also provides a method for detecting the exhaust safety of a water heater, wherein the water heater comprises a blower and a burner, the method is executed when the burner burns gas, and the method comprises the following steps: A. controlling the rotating speed of a motor of the blower and the gas flow supplied to the burner according to a set water temperature, and detecting the rotating speed value of the motor and performing preset expansion after the water outlet temperature of the water heater reaches a constant temperature range corresponding to the set water temperature so as to form a second allowable rotating speed range (namely an allowable rotating speed range defined by the invention); B. detecting the rotating speed value of a motor of the blower, and comparing whether the detected rotating speed value exceeds the second allowable rotating speed range; if so, stopping supplying the gas to the burner.
The invention has the advantages that the first allowable rotating speed range or the second allowable rotating speed range can effectively take the actual installation state of the exhaust pipe as a comparison standard, and the phenomenon that the exhaust pipe is judged to be in a serious blockage state because wind flows back into the exhaust pipe from the outside or the exhaust pipe is slightly shielded when the installation state of the exhaust pipe is not ideal is avoided.
Drawings
Fig. 1 shows a water heater to which the exhaust safety detection method of the present invention is applied.
FIG. 2 is a graph showing the rotational speed of the blower motor according to the above preferred embodiment of the present invention.
FIG. 3 is an initialization flowchart of the method for detecting the exhaust safety according to the above preferred embodiment of the present invention.
FIG. 4 is a flow chart of the method for exhaust safety detection before ignition according to a preferred embodiment of the present invention.
Fig. 5 is a flowchart of the exhaust safety detecting method according to the above preferred embodiment of the present invention after ignition.
FIG. 6 is a flowchart illustrating the method for detecting exhaust safety after changing the set water temperature and water flow rate according to the above preferred embodiment of the present invention.
FIG. 7 is a graph showing the relationship between the temperature of the outlet water and the time according to the above preferred embodiment of the present invention.
Drawings and description will be given
10 burner
102 water conveying pipe
102a inlet pipe section
102b outlet pipe section
20 ratio valve
30 blower
32 motor
40 rotating speed detector
42-inlet water temperature detector
44 water flow detector
46 outlet water temperature detector
50 controller
52 memory cell
60 control panel
62 temperature adjusting button
64 display
66 buzzer
70 tap
72 exhaust pipe
74 gas pipe
S501-S503, S601-S603
T1-T3 set water temperature
time points t0, t1, t 1', t2 and t2
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
Referring to fig. 1, a water heater for implementing the exhaust gas safety detection method according to the first preferred embodiment of the present invention includes a burner 10, a gas regulating valve, such as a proportional valve 20, a blower 30, a rotation speed detector 40, a controller 50, and a control panel 60. Wherein:
the burner 10 is disposed below a water pipe 102 for heating water in the water pipe 102. The exhaust gas generated when the burner 10 is heated is discharged to the outside through an additional exhaust pipe 72, for example, when the water heater is installed indoors, the exhaust pipe 72 is connected to the outside to discharge the exhaust gas to the outside.
The proportional valve 20 is disposed on a path of a gas pipe 74 communicated to the burner 10, and the proportional valve 20 is electrically connected to the controller 50 and controlled by the controller 50 to adjust the flow rate of the gas supplied to the burner 10. The blower 30 is disposed below the burner 10 and electrically connected to the controller 50, the blower 30 has a motor 32, in this embodiment, a dc motor, and the motor 32 drives a blower blade (not shown) to introduce air into the burner 10 when the motor 32 is activated, so that the air and the gas are mixed to achieve the purpose of combustion supporting. The speed of the motor 32 is controlled by the controller 50 and is proportional to the amount of air provided by the blower 30. The rotation speed detector 40 is disposed in the blower 30 and electrically connected to the controller 50 for detecting a rotation speed of the motor 32 of the blower 30.
The control panel 60 is electrically connected to the controller 50, and includes an input unit, such as two temperature adjusting buttons 62, a display 64, and an alarm unit, such as a buzzer 66, wherein each temperature adjusting button 62 is adjusted by a user to input a set water temperature, the set water temperature is used for setting an outlet water temperature to be reached after the water heater is heated, and the set water temperature is displayed on the display 64. The buzzer 66 is used for warning. In addition, pressing the two temperature adjustment buttons 62 at the same time inputs a correction command, the function of which will be described later.
The water heater further includes an inlet water temperature detector 42, a water flow detector 44, and an outlet water temperature detector 46 electrically connected to the controller 50. The inlet temperature detector 42 and the flow detector 44 are disposed on an inlet section 102a connected to the water pipe 102 to detect the inlet temperature and the flow rate, and the outlet temperature detector 46 is disposed on an outlet section 102b connected to the water pipe 102 to detect the temperature of the water. The outlet pipe segment 102b is connected to a faucet 70.
The controller 50 has a storage unit 52, and the storage unit 52 stores a plurality of sets of parameters for controlling the blower 30 and the proportional valve 20, each set of parameters corresponding to a different heat value. Under the condition of combustion, the air quantity supplied to the burner 10 has a certain better proportioning relation with the gas flow according to different firepower (i.e. different heat values). Therefore, the controller 50 calculates the required heat value according to the set water temperature, the inlet water temperature, the outlet water temperature and the water flow, and then retrieves a corresponding set of parameters from the storage unit 52 according to the calculated heat value to control the rotation speed of the motor 32 of the blower 30 and the proportional valve, so that the air amount and the gas flow reach a proper proportioning relationship, and the outlet water temperature reaches a constant temperature range corresponding to the set water temperature.
Referring to fig. 2, a curve a shows a rotation speed curve of the blower 30 after the motor 32 is controlled to start, and the rotation speed gradually approaches a stable ideal rotation speed value after a period of time in a normal state. It is known that when the air amount of the intake air and the exhaust air is insufficient due to aging of the blower 30 of the water heater, or when the exhaust pipe is blocked, the internal pressure is too large and the air cannot be supplemented, the ratio of the air amount and the gas flow provided to the burner 10 is unbalanced, so that the gas is not completely combusted and the amount of the generated carbon monoxide is increased.
Therefore, for the aged portion of the blower 30, usually after the blower 30 is started for a period of time, the rotation speed of the motor 32 is still lower than a certain allowable value (e.g. curve B), which will cause the increase of the amount of carbon monoxide, and we define the allowable value as the lowest threshold rotation speed value. When the rotation speed of the motor 32 is increased either at the start or during the operation (e.g., curve C represents start and curve D represents operation), the allowable value of the abnormal increase is defined as the maximum threshold rotation speed value, and when the rotation speed of the motor 32 is higher than the maximum threshold rotation speed value, it indicates that the exhaust pipe 72 is clogged and the increase of the amount of carbon monoxide causes a certain risk. In addition, the above description is made by taking the example that the motor 32 is controlled from the stop state to start, and the same situation still exists when the rotation speed of the motor 32 is controlled to increase or decrease to a specific rotation speed in the operating state.
Therefore, an allowable rotation speed range is formed by using the minimum and maximum threshold rotation speed values. Defining a first allowable speed range when the motor 32 is started from a stopped state before the gas is burned; under the condition of generating combustion, a plurality of different allowable rotation speed ranges are provided according to different firepower (namely different heat values). In other words, as long as the actual rotation speed of the motor 32 falls within the allowable rotation speed range, the amount of co generated will fall within the safe range.
In order to influence the rotation speed of the motor 32 of the blower 30 according to the installation type (such as different lengths and different turning times) of the exhaust pipe 72 formed when the water heater is installed at different locations, the exhaust safety detection method of the present embodiment obtains the aforementioned first allowable rotation speed range through the initialization process shown in fig. 3, wherein:
after the water heater is installed and the exhaust pipe 72 is connected to the water heater, and the installer determines that the exhaust pipe 72 is installed correctly and is not blocked, the installer simultaneously presses the two temperature adjustment buttons 62 on the control panel 60 to input the calibration command, so that the water heater executes an initialization process, wherein the initialization process comprises the following steps:
the controller 50 starts the blower 30 to operate after receiving the calibration command, and after the blower 30 is started for a period of time, the controller 50 detects the rotation speed value of the motor 32 of the blower 30 through the rotation speed detector 40.
Then, the controller 50 stores the rotation speed value detected by the rotation speed detector 40 in the storage unit 52 to form a first reference rotation speed value. The first reference rotation speed value is used for predetermined expansion, in this embodiment, a first rotation speed difference value is added to the first reference rotation speed value and a second rotation speed difference value is subtracted from the first reference rotation speed value, so as to obtain a first highest critical rotation speed value and a first lowest critical rotation speed value respectively, and the first highest critical rotation speed value and the first lowest critical rotation speed value are stored in the storage unit 52. The first highest critical rotation speed value and the first lowest critical rotation speed value constitute the first allowable rotation speed range. The first and second rotational speed difference values may be the same or different values, and both may be set to 90rpm according to practical usage experience. For example, the first reference rotation speed is 3500rpm, the first maximum and minimum threshold rotation speeds are 3590rpm and 3410rpm, respectively, and the first allowable rotation speed range is 3590-3410 rpm.
Therefore, the setting of the first allowable rotation speed range is completed, and the first allowable rotation speed range corresponds to the initial state of the exhaust pipe 72 and the blower 30 after the water heater is installed. Then, the controller 50 controls the blower 30 to stop operating, so that the water heater is in a standby state (i.e., the operation of the water heater is stopped). Thus, the initialization process is completed.
Referring to fig. 4, after each time the water heater is started to operate, a person turns on the faucet 70, the water flow detector 44 detects that the water in the water pipe 102 starts to flow, the controller 50 starts the blower 30 to operate, and after the blower 30 is started for a period of time, the rotational speed detector 40 detects the rotational speed of the motor 32 of the blower 30.
The controller 50 determines whether the detected rotation speed value falls within the first allowable rotation speed range:
if not (i.e. the rotation speed value is outside the first allowable rotation speed range), no gas is supplied to the burner 10, and the blower 30 is controlled to stop operating. In addition, the controller 50 determines whether the detected rotation speed is higher than the first highest threshold rotation speed or lower than the first lowest threshold rotation speed, and if the detected rotation speed is higher than the first highest threshold rotation speed or lower than the first lowest threshold rotation speed, an error code corresponding to the blockage of the exhaust pipe 72 is displayed on the display 64, and the buzzer 66 is controlled to sound; if the latter is the case, an error code corresponding to the aging of the blower 30 is displayed on the display 64, and the buzzer 66 is controlled to sound.
If so, the proportional valve 20 is controlled to supply gas to the burner 10 and an igniter (not shown) is controlled to ignite for combustion.
Therefore, the first allowable rotation speed range obtained by the initialization process can effectively use the actual installation state of the exhaust pipe 72 as a comparison reference, and avoid that the exhaust pipe 72 is determined to be in a serious blockage state due to wind flowing back from the outside or the exhaust pipe 72 being slightly shielded when the installation state of the exhaust pipe 72 is not ideal. In addition, if the water heater is moved, the exhaust pipe 72 is replaced, or the blower 30 is replaced, the calibration command can be input to enable the water heater to execute the initialization process so as to obtain the optimal first allowable rotating speed range.
After igniting the pilot gas, the exhaust safety detecting method of the present embodiment performs the following steps shown in fig. 5 and 6:
referring to fig. 7, assuming that the set water temperature is set as the set water temperature T1, in step S501, the controller 50 calculates the heat value required for heating the water in the water pipe 102 to the set water temperature T1 continuously in real time according to the set water temperature T1, the temperature difference between the outgoing water temperature and the incoming water temperature, and the water flow rate, and retrieves the corresponding parameters in the storage unit 52 to control the rotation speed of the motor 32 of the blower 30 and the gas flow rate supplied to the burner 10 by the proportional valve 20, so as to gradually change the outgoing water temperature (the interval from time T0 to time T1).
In step S502, after the outlet water temperature reaches a constant temperature range corresponding to the set water temperature T1 (time point T1), the controller 50 detects the rotation speed of the motor 32 through the rotation speed detector 40 and stores the rotation speed in the storage unit 52 to form a second reference rotation speed. In step S503, the second reference rotation speed value is subjected to predetermined expansion, i.e., the second reference rotation speed value is added with a first rotation speed difference value and subtracted with a second rotation speed difference value to form a second highest critical rotation speed value and a second lowest critical rotation speed value, and the second highest critical rotation speed value and the second lowest critical rotation speed value are stored in the storage unit 52. The second highest threshold rotation speed value and the second lowest threshold rotation speed value form a second allowable rotation speed range (i.e. an allowable rotation speed range defined by the present invention). The first and second rotational speed differences used in this step may be the same or different.
Then, before the water heater is in operation (i.e. the water tap 70 is in a continuous water-out state) and the set water temperature T1 is not changed by the user (i.e. the interval from the time point T1 to the time point T1'), the controller 50 detects the rotation speed value of the motor 32 through the rotation speed detector 40, and determines whether the detected rotation speed value falls outside the second allowable rotation speed range:
if yes, the proportional valve 20 is controlled to stop supplying gas to the burner 10, and the blower 30 is controlled to stop operating after a certain period of time to discharge the waste gas in the water heater. In addition, the controller 50 determines whether the detected rotation speed is higher than the second highest threshold rotation speed or lower than the second lowest threshold rotation speed, and if the detected rotation speed is higher than the second highest threshold rotation speed, an error code corresponding to the blockage of the exhaust pipe 72 is displayed on the display 64, and the buzzer 66 is controlled to sound; if the latter is the case, an error code corresponding to the aging of the blower 30 is displayed on the display 64, and the buzzer 66 is controlled to sound.
If not (i.e. the detected rotation speed value is within the second allowable rotation speed range), the steps of detecting the rotation speed value and determining the rotation speed value are executed again and the heat value corresponding to the constant temperature range of the set water temperature T1 is calculated continuously in real time according to the set water temperature, the temperature difference between the outlet water temperature and the inlet water temperature and the water flow until the water flow changes and the calculated heat value exceeds a first predetermined heat value range, the water tap 70 is turned off, or the set water temperature is changed. If the water flow is changed (the water flow is not zero) and the calculated heat value is beyond the second predetermined heat value range, the step S501 is executed again; if the water tap 70 is closed, executing a finishing process, including stopping gas and stopping the operation of the blower after a period of time, so that the water heater is in standby; if the set water temperature is changed, the flow shown in fig. 6 is executed.
Referring to fig. 6, assuming that the set water temperature T1 is changed by the user at the time point T1 ', in step S601, the controller 50 calculates the heat value required for heating the water in the water pipe 102 to the set water temperature T2 continuously in real time according to the changed set water temperature T2, the temperature difference between the outlet water temperature and the inlet water temperature, and the water flow rate, and retrieves the corresponding parameters in the storage unit 52 to control the rotation speed of the motor 32 of the blower 30 and the gas flow rate supplied to the burner by the proportional valve 20, so as to gradually change the outlet water temperature (the interval from the time point T1' to the time point T2).
In step S602, when the outlet water temperature reaches another constant temperature range corresponding to the changed set water temperature T2 (time point T2), the controller 50 detects the rotation speed of the motor 32 through the rotation speed detector 40 and stores the rotation speed in the storage unit 52 to form a third reference rotation speed. In step S603, the third reference rotation speed value is subjected to predetermined expansion, i.e., the third reference rotation speed value is added with a first rotation speed difference value and subtracted with a second rotation speed difference value to form a third highest critical rotation speed value and a third lowest critical rotation speed value, and the third highest critical rotation speed value and the third lowest critical rotation speed value are stored in the storage unit 52. The third highest critical rotation speed value and the third lowest critical rotation speed value form a third allowable rotation speed range (i.e. another allowable rotation speed range defined by the present invention). The first and second rotational speed differences used in this step may be the same or different.
Then, before the water heater is in operation (i.e. the water tap 70 is in a continuous water outlet state) and the set water temperature T2 is not changed by the user (i.e. the interval from the time point T2 to the time point T2'), the controller 50 detects the rotation speed value of the motor 32 through the rotation speed detector 40, and determines whether the detected rotation speed value falls outside the third allowable rotation speed range:
if yes, the proportional valve 20 is controlled to stop supplying gas to the burner 10, and the blower 30 is controlled to stop operating after a certain period of time to discharge the waste gas in the water heater. In addition, the controller 50 determines whether the detected rotation speed is higher than the third highest threshold rotation speed or lower than the third lowest threshold rotation speed, and if the detected rotation speed is higher than the third highest threshold rotation speed, an error code corresponding to the blockage of the exhaust pipe 72 is displayed on the display 64, and the buzzer 66 is controlled to sound; if the latter is the case, an error code corresponding to the aging of the blower 30 is displayed on the display 64, and the buzzer 66 is controlled to sound.
If not (i.e., the detected rotation speed value is within the third allowable rotation speed range), the steps of detecting the rotation speed value and determining the rotation speed value are executed again and the heat value of the constant temperature range of the set water temperature T2 is calculated continuously in real time according to the set water temperature, the temperature difference between the outgoing water temperature and the incoming water temperature, and the water flow until the water flow changes and the calculated heat value exceeds a second predetermined heat value range, the faucet 70 is turned off, or the set water temperature is changed again. If the water flow is changed (the water flow is not zero) and the calculated heat value is beyond the second predetermined heat value range, the step S601 is executed again; if the water tap 70 is turned off, the process is ended, including stopping the gas and stopping the blower after a certain time, so that the water heater is in standby.
If the set water temperature is changed again, the step S601 is repeated when the outlet water temperature reaches the constant temperature range corresponding to the new set water temperature T3, which is not described herein again.
Therefore, in the process of heating by burning gas, the second or third reference rotation speed value used each time the water temperature reaches the constant temperature corresponds to the installation state of the exhaust pipe 72, so that the judgment of the blockage of the exhaust pipe 72 or the aging of the blower 30 is more accurate, and the safety of using the water heater is effectively improved.
The invention can accurately judge whether the exhaust pipe is blocked or the blower is aged only according to the rotating speed value detected by the rotating speed detector without being matched with other detectors (for example, an exhaust flow detector or a wind pressure detector is arranged on the path of the exhaust pipe), thereby effectively reducing the manufacturing cost of the ground water heater and simplifying the judging process of the controller.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A method for detecting the exhaust safety of a water heater, which comprises a blower and a burner, is executed when the burner burns gas, and comprises the following steps:
A. controlling the rotating speed of a motor of the blower and the gas flow supplied to the burner according to a set water temperature, and detecting the rotating speed value of the motor and performing preset expansion after the water outlet temperature of the water heater reaches a constant temperature range corresponding to the set water temperature so as to form an allowable rotating speed range;
B. detecting the rotating speed value of a motor of the blower, and comparing whether the detected rotating speed value exceeds the allowable rotating speed range; if so, stopping supplying the gas to the burner.
Wherein, the step B comprises, if the detected rotation speed value falls within the allowable rotation speed range, re-executing the step B until the set water temperature is changed, and further comprising executing the following steps C and D:
C. after the set water temperature is changed, controlling the rotating speed of the motor and the gas flow supplied to the burner according to the changed set water temperature, and detecting the rotating speed value of the motor and performing preset expansion after the outlet water temperature of the water heater reaches another constant temperature range corresponding to the changed set water temperature so as to form another allowable rotating speed range;
D. detecting the rotating speed value of a motor of the blower and comparing whether the detected rotating speed value exceeds the other allowable rotating speed range; if so, stopping supplying the gas to the burner.
2. A method for detecting the exhaust safety of a water heater, which comprises a blower and a burner, is executed when the burner burns gas, and comprises the following steps:
A. controlling the rotating speed of a motor of the blower and the gas flow supplied to the burner according to a set water temperature, and detecting the rotating speed value of the motor and performing preset expansion after the water outlet temperature of the water heater reaches a constant temperature range corresponding to the set water temperature so as to form an allowable rotating speed range;
B. detecting the rotating speed value of a motor of the blower, and comparing whether the detected rotating speed value exceeds the allowable rotating speed range; if so, stopping supplying the gas to the burner;
wherein, step B comprises, calculating a heat value corresponding to the constant temperature range continuously according to the set water temperature, the temperature difference between an outlet water temperature and an inlet water temperature of the water heater and a water flow, and if the detected rotation speed value is within the allowable rotation speed range, re-executing step B until the water flow is changed and the heat value exceeds a predetermined heat value range, and then re-executing step A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910155388.5A CN110081605B (en) | 2015-11-02 | 2015-11-02 | Exhaust safety detection method of water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510730884.0A CN106642713B (en) | 2015-11-02 | 2015-11-02 | The exhaust, safety detection method of water heater |
| CN201910155388.5A CN110081605B (en) | 2015-11-02 | 2015-11-02 | Exhaust safety detection method of water heater |
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| CN201510730884.0A Division CN106642713B (en) | 2015-11-02 | 2015-11-02 | The exhaust, safety detection method of water heater |
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| CN110081605A CN110081605A (en) | 2019-08-02 |
| CN110081605B true CN110081605B (en) | 2021-02-26 |
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| CN201910155388.5A Active CN110081605B (en) | 2015-11-02 | 2015-11-02 | Exhaust safety detection method of water heater |
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| TWI620897B (en) * | 2017-11-28 | 2018-04-11 | 南開科技大學 | Gas water heater adjustment system and method thereof |
| CN109028593B (en) * | 2018-06-01 | 2020-09-25 | 广东万和热能科技有限公司 | Air-fuel ratio control method and device for gas heating water heater and gas heating water heater |
| CN109028594B (en) * | 2018-06-01 | 2021-06-15 | 广东万和热能科技有限公司 | Air-fuel ratio control method and device for gas heating water heater and gas heating water heater |
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| CN106642713B (en) | 2019-05-17 |
| CN110081605A (en) | 2019-08-02 |
| CN106642713A (en) | 2017-05-10 |
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