CN112128991B - Exhaust protection control method and water heater using same - Google Patents
Exhaust protection control method and water heater using same Download PDFInfo
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- CN112128991B CN112128991B CN202010909345.4A CN202010909345A CN112128991B CN 112128991 B CN112128991 B CN 112128991B CN 202010909345 A CN202010909345 A CN 202010909345A CN 112128991 B CN112128991 B CN 112128991B
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- wind pressure
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000003546 flue gas Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001314 paroxysmal effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
-
- 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
- F24H9/0005—Details for water heaters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention discloses an exhaust protection control method and a water heater using the same, wherein the control method for preventing channel blockage is applied to the water heater, and comprises the following steps: detecting a wind pressure value in an exhaust channel; when the detected wind pressure value is lower than the preset wind pressure value, the rotating speed of the fan is increased; when detecting that the wind pressure value is less than preset wind pressure value and the fan rotational speed is the biggest, carry out timing protection, timing protection's step includes: and setting a protection period, wherein the rotating speed of the fan is kept to be maximum in the protection period, when the wind pressure value is detected to be larger than or equal to the preset wind pressure value in the protection period, the water heater continuously works, and when the wind pressure value is detected to be still lower than the preset wind pressure value after the protection period is finished, the water heater stops working. The control method provided by the invention can prevent the water heater from being frequently forced to stop due to short gusty strong wind through timing protection, and simultaneously solves the problem of smoke exceeding caused by external environment or channel blockage.
Description
Technical Field
The invention belongs to the technical field of household appliances, and particularly relates to an exhaust protection control method and a water heater using the same.
Background
Along with the popularization and application of the gas water heater, great convenience is brought to the daily life of people, and meanwhile, in order to prevent the safety accidents caused by insufficient combustion of gas or gas leakage, the exhaust fan is assembled to pump and exhaust waste gas generated by combustion. However, when using gas heater, if external wind pressure is too big or the pipeline blocks up, then gas heater is the resistance increase of discharging fume when using, and forced-ventilated fan's exhaust fume efficiency step-down to make the burning insufficient, waste gas exceeds standard, and the temperature step-down has the potential safety hazard, causes very big harm to user's healthy.
At present, a wind pressure switch is mostly adopted by forced-ventilated gas water heaters as a protection mechanism of the gas water heaters, and when a wind pressure value of a sampling point reaches a preset action value of the wind pressure switch, the wind pressure switch is switched off, so that the gas water heaters stop working. Under the condition of short paroxysmal strong wind, the water heater is forced to stop running frequently, and the comfort of users is affected.
Disclosure of Invention
The invention aims to provide an exhaust protection control method and a water heater using the same, which can avoid the situation that the water heater is frequently forced to stop due to short gusty and strong wind, and solve the problem of smoke exceeding caused by external environment or channel blockage.
In order to realize the purpose, the following technical scheme is adopted:
an exhaust protection control method is applied to a water heater and comprises the following steps:
detecting a wind pressure value in an exhaust channel;
when the detected wind pressure value is lower than the preset wind pressure value, the rotating speed of the fan is increased;
when detecting that the wind pressure value is less than preset wind pressure value and the fan rotational speed is the biggest, carry out timing protection, timing protection's step includes: and setting a protection period, wherein the rotating speed of the fan is kept to be maximum in the protection period, when the wind pressure value is detected to be larger than or equal to the preset wind pressure value in the protection period, the water heater continuously works, and when the wind pressure value is detected to be still lower than the preset wind pressure value after the protection period is finished, the water heater stops working.
Further, the step of setting the guard period includes:
and obtaining a corresponding protection period according to the difference value between the detected wind pressure value and the preset wind pressure value.
Further, before the step of detecting the wind pressure value in the exhaust passage, the method further comprises the following steps: presetting and storing a preset wind pressure value and a protection period corresponding to a difference value between the detected wind pressure value and the preset wind pressure value.
Further, a difference value between the detected wind pressure value and the preset wind pressure value is inversely related to the protection period.
Further, after the water heater stops working, the fan is controlled to perform post-cleaning work.
A water heater applying the exhaust protection control method comprises an exhaust passage for discharging combusted smoke, and further comprises the following steps:
the detection unit is used for detecting the wind pressure value of the exhaust channel when the water heater is used;
the control unit is used for controlling the rotating speed of the fan and the switch of the water heater and sending a timing protection instruction according to the detected wind pressure value;
and the timing unit is used for starting timing when receiving the timing protection instruction.
And the processing unit is electrically connected with the detection unit and the control unit and used for executing a timing protection instruction and obtaining a corresponding protection period according to the difference value between the detected wind pressure value and the preset wind pressure value.
Furthermore, the processing unit is further configured to compare the detected wind pressure value with a preset wind pressure value in a protection period, obtain an instruction for controlling the switch of the water heater according to a comparison result, and transmit the instruction to the control unit.
Further, the protection device further comprises a storage unit which is electrically connected with the processing unit and is used for presetting and storing a preset wind pressure value and a protection period corresponding to a difference value between the detected wind pressure value and the preset wind pressure value.
According to the technical scheme provided by the embodiment of the application, the rotating speed of the fan is controlled by detecting the air pressure value, the condition that the water heater is frequently and forcibly stopped due to short-time gusty and strong wind is avoided through timing protection, and the problem that smoke exceeds the standard due to external environment or channel blockage is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flowchart illustrating steps of a method for controlling exhaust protection according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a method for controlling exhaust protection according to a second embodiment of the present invention;
fig. 3 is a system block diagram of a water heater to which the exhaust protection control method is applied according to a third embodiment of the present invention.
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 the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
The embodiment of the invention provides an exhaust protection control method, which is applied to a water heater and comprises the following steps of S1-S3:
and S1, detecting the wind pressure value in the exhaust channel. And detecting the air pressure value in the exhaust channel when the water heater starts to work to generate gas waste gas. When the external environment is strong wind or other extreme weather, the detected wind pressure value is that the wind pressure generated by the rotation of the fan is influenced by the external resistance and is smaller than the wind pressure value generated by the rotation of the fan; when the exhaust duct is blocked, the detected wind pressure value is influenced by the blocking object for the wind pressure generated by the rotation of the fan, and the wind pressure value cannot smoothly circulate, so that the detected wind pressure value is smaller than the wind pressure value generated by the rotation of the fan.
And S2, when the detected wind pressure value is lower than the preset wind pressure value, increasing the rotating speed of the fan.
Because the wind pressure value is less than preset wind pressure value (the normal work of water heater is not influenced the time fan rotates, the wind pressure in the exhaust duct), so probably be the pipeline blocking or receive external resistance influence, increase fan rotational speed can blow off gaseous jam and the solid jam that the quality is little, can also increase the wind pressure and resist external resistance.
S3, when detecting that the wind pressure value is lower than the preset wind pressure value and the rotating speed of the fan is maximum, timing protection is carried out, and the timing protection comprises the following steps: and setting a protection period, wherein the rotating speed of the fan is kept to be maximum in the protection period, when the wind pressure value is detected to be larger than or equal to the preset wind pressure value in the protection period, the water heater continuously works, and when the wind pressure value is detected to be still lower than the preset wind pressure value after the protection period is finished, the water heater stops working.
The embodiment provides a control method for exhaust protection, through detecting the wind pressure value in the pipeline, the rotational speed of control fan prevents that it from appearing because of inside jam or the flue gas that external environment caused exceeds standard, causes the condition of potential safety hazard, sets up the guard cycle under the condition that promotes the fan rotational speed and can not improve the exhaust situation simultaneously, makes the water heater can not frequently close when meetting short gusty nature strong wind, influences user's experience and feels.
Example two
The second embodiment of the present invention provides an exhaust protection control method, which is applied to a water heater, and on the basis of the first embodiment, step S3 includes:
s31, when the wind pressure value is lower than the preset wind pressure value and the rotating speed of the fan is maximum, timing protection is carried out, and the maximum rotating speed of the fan is maintained;
s32, obtaining a corresponding protection period according to the difference value between the calculated wind pressure value and the preset wind pressure value;
and S33, when the wind pressure value detected in the protection period is greater than or equal to the preset wind pressure value, the water heater continuously works, and when the wind pressure value detected after the protection period is over is still lower than the preset wind pressure value, the water heater stops working.
In this embodiment, before step S1, the method further includes:
and S0, presetting and storing a preset wind pressure value and a protection period corresponding to the difference value between the detected wind pressure value and the preset wind pressure value. The preset air pressure value is used for being compared with the detected air pressure value, and further the rotating speed of the fan and the on-off of the water heater are controlled; the corresponding relationship of the difference value and the protection period plays a role in the timing protection step.
The more the wind pressure value exceeds the preset value, the more the influence is, the shorter the protection period is, the less the wind pressure value exceeds the preset value, the more the influence is, the longer the time limit time is, and therefore, the negative correlation is formed between the difference value of the wind pressure value and the preset wind pressure value and the size of the protection period.
In this embodiment, the control method further includes:
and S4, controlling the fan to perform post-cleaning work after the water heater stops working. And operating the fan to treat residual gas and waste gas in the channel.
The exhaust protection control method provided by the embodiment, through detecting the wind pressure value in the pipeline, the rotational speed of control fan, prevent that it from appearing because of inside jam or the flue gas that external environment caused exceeds standard, cause the condition of potential safety hazard, set up the protection cycle simultaneously under the condition that promotes the fan rotational speed and can not improve the exhaust situation, the corresponding relation of preset protection cycle and wind pressure value difference, different wind pressure values correspond the protection cycle of different length, avoid because of the safety problem that protection cycle overlength or short initiation, make the water heater can not frequently close when meetting short gusty nature strong wind, also can not close for a long time and lead to the flue gas to block up and the safety problem appears, user's experience is felt has been promoted.
EXAMPLE III
The second embodiment of the invention provides a water heater applying the control method for preventing the channel blockage, and the control method is implemented, wherein the water heater comprises an exhaust channel for exhausting flue gas after combustion, and the water heater further comprises:
the detection unit 1 is used for detecting a wind pressure value of an exhaust channel when the water heater is used, and the detection unit adopts a wind pressure sensor in the embodiment;
the control unit 2 is used for controlling the rotating speed of the fan and the switch of the water heater and sending a timing protection instruction according to the detected wind pressure value;
and the timing unit 3 is used for starting timing when receiving the timing protection instruction.
The water heater of this embodiment further includes a processing unit 4 electrically connected to the detecting unit 1 and the control unit 2, and configured to execute a timing protection instruction, and obtain a corresponding protection period according to a difference between the detected wind pressure value and a preset wind pressure value. The processing unit 4 is further configured to compare the detected wind pressure value with a preset wind pressure value in the protection period, obtain an instruction for controlling the switch of the water heater according to a comparison result, and transmit the instruction to the control unit 2.
The water heater of this embodiment further includes a storage unit 5 electrically connected to the processing unit 4, and configured to preset and store a preset wind pressure value, and a protection period corresponding to a difference between the detected wind pressure value and the preset wind pressure value.
The present invention is not limited to the above preferred embodiments, and any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An exhaust protection control method is applied to a water heater and is characterized by comprising the following steps:
presetting and storing a preset wind pressure value and a protection period corresponding to a difference value between the detected wind pressure value and the preset wind pressure value, wherein the difference value between the detected wind pressure value and the preset wind pressure value is in negative correlation with the protection period;
detecting a wind pressure value in an exhaust channel;
when the detected wind pressure value is lower than the preset wind pressure value, the rotating speed of the fan is increased;
when detecting that the wind pressure value is less than preset wind pressure value and the fan rotational speed is the biggest, carry out timing protection, timing protection's step includes: and setting a protection period, wherein the rotating speed of the fan is kept to be maximum in the protection period, when the wind pressure value is detected to be larger than or equal to the preset wind pressure value in the protection period, the water heater continuously works, and when the wind pressure value is detected to be still lower than the preset wind pressure value after the protection period is finished, the water heater stops working.
2. The exhaust protection control method according to claim 1, wherein the step of setting the guard period includes:
and obtaining a corresponding protection period according to the difference value between the detected wind pressure value and the preset wind pressure value.
3. An exhaust protection control method according to claim 2, characterized in that: and after the water heater stops working, controlling the fan to perform rear cleaning work.
4. A water heater to which the exhaust gas protection control method of any one of claims 1 to 3 is applied, comprising an exhaust passage for discharging flue gas after combustion, characterized by further comprising:
the detection unit is used for detecting the wind pressure value of the exhaust channel when the water heater is used;
the control unit is used for controlling the rotating speed of the fan and the switch of the water heater and sending a timing protection instruction according to the detected wind pressure value;
the timing unit is used for starting timing when receiving a timing protection instruction;
the processing unit is electrically connected with the detection unit and the control unit and used for executing a timing protection instruction and obtaining a corresponding protection period according to the difference value between the detected wind pressure value and the preset wind pressure value;
the device also comprises a storage unit which is electrically connected with the processing unit and is used for presetting and storing a preset wind pressure value and a protection period corresponding to the difference value between the detected wind pressure value and the preset wind pressure value.
5. A water heater as claimed in claim 4, wherein: and the processing unit is also used for comparing the detected wind pressure value with a preset wind pressure value in a protection period, obtaining an instruction for controlling the switch of the water heater according to a comparison result and transmitting the instruction to the control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010909345.4A CN112128991B (en) | 2020-09-02 | 2020-09-02 | Exhaust protection control method and water heater using same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010909345.4A CN112128991B (en) | 2020-09-02 | 2020-09-02 | Exhaust protection control method and water heater using same |
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| CN112128991A CN112128991A (en) | 2020-12-25 |
| CN112128991B true CN112128991B (en) | 2022-02-22 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113028652B (en) * | 2021-04-03 | 2022-04-26 | 中山百得厨卫有限公司 | Water heater control method based on wind pressure sensor and water heater |
| CN113606793B (en) * | 2021-07-16 | 2022-12-09 | 广东万家乐燃气具有限公司 | Gas water heating equipment based on alternating current fan and high wind resistance control method thereof |
| CN114811958B (en) * | 2022-02-18 | 2024-03-15 | 广东万和热能科技有限公司 | Control method, device and equipment of wall-mounted furnace and computer readable storage medium |
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| CN111121299A (en) * | 2018-10-30 | 2020-05-08 | 宁波方太厨具有限公司 | Fan control method of gas water heater and up-drawing dual-purpose furnace applying same |
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