CN108571825B - Control method and control device for blockage of filtering device and gas water heater - Google Patents
Control method and control device for blockage of filtering device and gas water heater Download PDFInfo
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- CN108571825B CN108571825B CN201710134975.7A CN201710134975A CN108571825B CN 108571825 B CN108571825 B CN 108571825B CN 201710134975 A CN201710134975 A CN 201710134975A CN 108571825 B CN108571825 B CN 108571825B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000001914 filtration Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000002485 combustion reaction Methods 0.000 claims abstract description 43
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 23
- 229910052799 carbon Inorganic materials 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000002912 waste gas Substances 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
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention relates to a control method and a control device for blocking a filtering device and a gas water heater. The invention can not only remove oil and dust from the air entering the water heater, effectively improve the quality of the combustion air and prolong the service life of the water heater, but also detect the air inlet speed in real time through the air speed detection device, and adjust the working state of the air supply fan according to the detection result by the controller, thereby ensuring the air supply requirement of the combustion of the water heater and further improving the safety and reliability of the work.
Description
Technical Field
The invention relates to a method and a device for controlling the blockage of a filtering device, and also relates to a gas water heater adopting the method and the device.
Background
At present, the household gas water heater mainly takes a forced-ventilated type as a main part and is mostly installed in a kitchen. When the gas water heater is used, combustion air is taken from the indoor, and because the installation environment of the water heater is poor and the water heater is in an environment with serious oil pollution, a large amount of oil dirt, dust and the like are contained in the air sucked into the water heater through the air inlet when the water heater works. When the water heater is used for a period of time, the surfaces and the inner surfaces of parts can be full of oil stains and dust, particularly, the parts such as a fan, a burner, a heat exchanger, a valve body and the like, the oil stains and the dust are accumulated more seriously, the working efficiency of the parts is reduced linearly by the oil stains, the service life of the water heater is seriously influenced, and accidents are easily caused when the water heater is used.
At present, two common air inlets of a gas water heater (forced-ventilated type) are provided, namely a shutter type air inlet and a through hole type air inlet. The louver type water heater is generally arranged on two side surfaces of the water heater, the through holes are formed in the back of the water heater, the structure or the position of the louver type water heater can prevent water from splashing, and the louver type water heater does not have any filtering effect on oil stains and dust.
In order to solve the problems in the prior art, a filtering device is arranged at an air inlet of the water heater and used for filtering oil stains and dust entering from the air inlet. However, after the filter device works for a period of time, oil stains and dust can be accumulated on the filter device to cause the filter device to be blocked, and at the moment, the air inlet quantity at the air inlet can be obviously reduced, so that the normal work of the gas water heater is influenced.
Disclosure of Invention
The invention mainly solves the technical problem of providing a control method and a control device for blocking a filter device, which can control the working state of a fan according to the blocking condition of the filter device at an air inlet so as to ensure the air supply requirement of equipment and further improve the working safety and reliability, and also provides a gas water heater adopting the control method and the control device.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method of controlling clogging of a filter apparatus, comprising the steps of:
A. monitoring the air inlet speed in real time by using a wind speed detection device;
B. and judging the blocking state of the filtering device according to the detected wind speed value, and correspondingly adjusting the rotating speed of the fan according to the blocking state.
Further, the step B specifically includes the following steps:
the upper limit value and the lower limit value of the wind speed are set in advance according to the corresponding relation function of the wind speed and the combustion load,
b1, when the detected wind speed value is in the area between the upper limit value and the lower limit value, judging that the state of the filter device is good, keeping the normal combustion state and maintaining the rotating speed of the fan;
and B2, when the detected wind speed value is in the area higher than the upper limit value, judging that the filter device is in a blocking state, and increasing the rotating speed of the fan.
Further, step B includes determining that the combustion is abnormal when the detected wind speed value is within a range lower than the lower limit value, and reducing the rotation speed of the fan.
Further, in the step B2, before increasing the rotation speed of the fan, the method further includes a step of determining whether the rated load of the fan motor is exceeded;
b21, when judging that the rated load of the fan motor is exceeded, judging that the filtering device is in a serious blockage state, triggering an alarm device, and reminding a user to clean the filtering device;
and B22, when judging that the rated load of the fan motor is not exceeded, judging that the filter device is in a light blockage state, and increasing the rotating speed of the fan.
Further, the step B further includes setting a limit value of the wind speed in advance, determining whether the wind speed is in a region higher than the limit value, and directly shutting down the equipment if the wind speed is in the region higher than the limit value.
Further, the method also comprises a step of judging whether the filtering device is cleaned or not, and the equipment can be restarted only after the filtering device is cleaned.
The other technical scheme of the invention is as follows:
a control device adopting the control method for the blockage of the filtering device comprises a wind speed detection device and a controller, wherein the wind speed detection device is connected with the controller and used for monitoring the wind speed of inlet air, a storage unit, a judgment unit and an execution unit are arranged in the controller, wind speed critical values of different blockage states of the filtering device, which are set according to a corresponding relation function of the wind speed and the combustion load, are stored in the storage unit in advance, the judgment unit is used for comparing a wind speed value fed back by the wind speed detection device with the set wind speed critical values of all the states and judging the blockage state of the filtering device according to the wind speed value, and the execution unit is used for correspondingly adjusting the rotating speed of a fan according to.
And the alarm device is connected with the controller, and when the filter device is judged to be in a serious blockage state, the controller controls the alarm device to give an alarm.
The invention also adopts the technical scheme that:
a gas water heater comprising a housing having an air inlet therein, a filter unit mounted at the air inlet, and a control unit as claimed in claim 7 or 8.
Further, the filtering device comprises a filter and a collector, and the filter and the collector are mounted on the shell of the water heater in a clamping mode.
In summary, according to the control method and the control device for blocking the filtering device and the gas water heater provided by the invention, the filtering device and the air speed detection device are additionally arranged at the air inlet of the shell of the water heater, so that oil and dust of air entering the water heater are removed, the quality of combustion air is effectively improved, the working efficiency of internal parts is improved, and the service life of the water heater is prolonged. Meanwhile, the air inlet speed is detected in real time through the air speed detection device, detection data are fed back to the controller, the working state of the air supply fan is adjusted through the controller, the air supply requirement of combustion of the water heater is guaranteed, and the safety and the reliability of work are improved. Moreover, when the controller detects that the fan can not meet the air supply requirement of normal combustion, the alarm device can automatically alarm to warn a user that the air supply of the fan influences the use of the machine, the filter needs to be cleaned, and sufficient air entering the machine is guaranteed.
The intelligent control system can monitor the blockage state of the air inlet of the equipment and can also be used for monitoring the problems of fan abnormity, exhaust system abnormity and the like through the intelligent control of the fan. The invention can be used for all gas appliances including gas water heaters.
FIG. 1 is a schematic view of the gas water heater of the present invention;
FIG. 2 is a schematic view of the internal structure of the gas water heater of the present invention;
FIG. 3 is a schematic view of the filter apparatus of the present invention;
FIG. 4 is a schematic view of a filter construction according to the present invention;
FIG. 5 is a schematic side view of the structure of FIG. 4;
FIG. 6 is a schematic view of the control device of the present invention;
FIG. 7 is a schematic view of a fan speed versus combustion load curve;
FIG. 8 is a schematic diagram of a corresponding curve of a fan speed and a wind speed;
FIG. 9 is a graphical representation of wind speed versus combustion load;
fig. 10 is a flow chart of a control method of the present invention.
As shown in fig. 1 to 10, a housing 1, a gas valve 2, a fan 3, a combustion device 4, a heat exchange device 5, a controller 6, a water inlet/outlet 7, an exhaust port 8, an air inlet 9, a filtering device 10, a filter 11, a filter screen 11a, a filter screen shell 11b, a collector 12, a positioning boss 13, a positioning slot 14, a fixing claw 15, a fixing buckle 16, a flange 17, a mounting plate 18, a bayonet 19, a handle 20 and an air speed sensor 21.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
as shown in fig. 1 and 2, the present invention provides a gas water heater, which comprises a housing 1, wherein a gas valve 2, a fan 3, a combustion device 4, a heat exchange device 5, a controller 6, etc. are installed in the housing 1. A water inlet and outlet 7 and an exhaust port 8 are arranged on the shell 1, the water inlet and outlet 7 is connected with a water inlet pipe, the exhaust port 8 is connected with an exhaust pipe, and CO waste gas generated by combustion is exhausted from the exhaust port 8 at the top and is exhausted to the outside through the exhaust pipe.
As shown in fig. 1, the side walls of the two sides of the housing 1 are respectively provided with an air inlet 9, and only one air inlet 9 may be provided, or may be provided at other positions such as the rear wall and the front panel of the housing 1. A filter device 10 is installed at each air inlet 9.
As shown in fig. 3, the filtering device 10 includes a filter 11 and a collector 12, the filter 11 is installed above the collector 12, and the filter 11 removes oil and dust from air entering the water heater, so as to improve the quality of combustion air and improve the working efficiency of various components inside the water heater, thereby prolonging the service life of the water heater. The oil and the like filtered by the filter 11 flow into the collector 12 at the lower part, which is convenient for the user to handle. In this embodiment, as shown in fig. 3 to 5, in order to facilitate replacement and cleaning of the filter 11 and the collector 12, both the filter 11 and the collector 12 are fixed to the housing 1 in a snap-fit manner.
As shown in fig. 3, the collector 12 is a flat container, the upper part of the container is open, three positioning bosses 13 are arranged on the side wall and the bottom wall of the collector 12, three positioning slots 14 are correspondingly arranged on the housing 1, and when the collector 12 is installed, the positioning bosses 13 are correspondingly clamped and fixed in the positioning slots 14. The concave handle 20 is arranged on the outer side surface of the collector 12, and when the collector is disassembled, the collector 12 can be disassembled by pulling the collector 12 outwards by holding the handle 20 by hand, so that the collector is very simple and convenient to replace and clean. In this embodiment, it is preferable that the outer surface of the collector 12 has a transparent portion, or the collector 12 is made of a transparent material, so that a user can see the oil collection condition in the collector 12 at any time, and the user can dispose the collected matter in time according to the condition.
As shown in fig. 3 to 5, the filter 11 includes a filter screen 11a and a filter screen housing 11b, the filter screen 11a is fixedly installed in the filter screen housing 11b, two fixing claws 15 are provided on the upper portion of the back surface (the surface facing the inside of the housing 1) of the filter screen housing 11b, two fixing buckles 16 are provided on the lower portion, a flange 17 bent inward is provided at the air inlet 9 of the housing 1, the fixing claws 15 on the filter screen housing 11b are fixed to the flange 17 in a clamping manner, two mounting plates 18 extending out of the center are provided at the center of the air inlet 9, a bayonet 19 is provided on the mounting plates 18, and the fixing buckles 16 are fixed to the bayonet 19 in a clamping manner.
When the filter 11 is installed, the fixing buckle 16 at the lower part of the filter screen shell 11b is clamped into the bayonet 19 on the shell 1, and then the filter screen frame 11b is pressed downwards towards the installation part of the shell 1, so that the fixing clamping jaw 15 at the upper part is clamped into the flanging 17 of the shell 1, the installation of the filter 11 is completed, the disassembly and the assembly are very simple and convenient, and the replacement and the cleaning are convenient.
In this embodiment, a control device for determining the blocking state of the filtering device 10 and adjusting the rotation speed of the fan according to the blocking state is further disposed on the gas water heater.
As shown in fig. 6, the control device includes a wind speed detection device, the wind speed detection device is a wind speed sensor 21 mounted on the fan 3, and the wind speed sensor 21 is in signal connection with the controller 6 and is used for monitoring the wind speed of the inlet wind in real time and feeding the detected wind speed information back to the controller 6. The controller 6 is connected with the fan 3, and adjusts the rotating speed of the fan 3 according to the fed back air speed signal so as to ensure the normal working and combustion of the water heater. The controller 6 is connected with a display (not shown in the figure) at the same time, an alarm device is arranged on the display, if the situation that the fan 3 cannot meet normal working combustion is detected, the controller 6 controls the alarm device to give an alarm to prompt a user to clean the filter 11, and the alarm device can adopt sound alarm, light alarm and the like, and can also adopt sound and light alarm at the same time.
Fig. 7 is a graph showing a correspondence curve between the rotation speed of the fan 3 and the combustion load. Under the normal combustion state of the water heater, namely the air inlet 9 is not blocked, the controller 6 controls the rotating speed of the fan 3 and the opening of the gas valve 2, so that the rotating speed and the opening of the gas valve are reasonably proportioned to achieve full combustion of the gas, CO generated by combustion in the state meets the standard requirement, the corresponding relation between the CO generation amount and the combustion load is shown as a curve (I) in fig. 7, the content of the carbon monoxide is slowly increased along with the increase of the combustion load, and the content of the carbon monoxide is kept unchanged after the carbon reaches a certain value. In the normal combustion state, when the water heater is controlled to raise and lower the temperature, the relationship between the rotation speed and the combustion load is in direct proportion as shown by a curve II in FIG. 7.
Fig. 8 is a schematic diagram of a curve of the rotational speed of the fan 3 corresponding to the wind speed, and a curve (i) in fig. 8 is a relationship between the wind speed and the rotational speed in a normal state, that is, a relationship between the wind speed and the rotational speed in the normal state is in direct proportion. When the filter 11 of the air inlet 9 is blocked, the relationship between the rotating speed of the fan 3 and the wind speed will deviate as shown by the curve (ii) in fig. 8, and it can be seen from the curve (ii) that in the blocked state, the wind speed corresponding to the same fan rotating speed will decrease, for example: when the rotation speed of the fan 3 is a, the corresponding wind speed is reduced from c in the normal state to b in the blocked state, and similarly, to maintain the wind speed unchanged, the rotation speed of the fan 3 must be increased, and at this time, the content of CO generated after the combustion of the fuel gas is increased due to the increase of the rotation speed corresponding to the curve c in fig. 7.
In fig. 8, a curve (c) is a relationship between the wind speed and the rotational speed in the normal state, and the upper limit value and the lower limit value, i.e., a curve (c) and a curve (c), are determined based on the relationship. Then, the curve of the corresponding relationship between the rotating speed and the combustion load shown by the curve (II) in FIG. 7 is converted into the curve of the corresponding relationship between the wind speed and the combustion load shown in FIG. 9.
As shown in fig. 9, by the above conversion, the line a in fig. 9 is determined as a standard line of the wind speed value, and the upper limit value (line B) and the lower limit value (line C) of the wind speed are determined by experiment. The wind speed is in the range between the line B and the line C, and the normal combustion state is obtained. The problems of abnormal combustion, overproof smoke CO emission and the like caused by the fact that the wind speed exceeds the range of the line B and the line C. When the wind speed corresponding to the fan rotating speed is detected to exceed the range between the line B and the line C, namely to be larger than the upper limit value of the line B or smaller than the lower limit value of the line C, the rotating speed of the fan 3 is adjusted through the controller 6, and the wind speed of the fan 3 is adjusted to be within the range between the line B and the line C, so that the generated CO is ensured to meet the standard requirement.
The controller 6 is provided with a storage unit, a judgment unit and an execution unit, wherein a database of the corresponding relation between the wind speed and the combustion load is stored in the storage unit in advance, and data corresponding to the critical values of different blockage states of the filter devices such as the line A, the line B, the line C and the like are stored in the storage unit of the controller 6 in advance. The judging unit is used for comparing the wind speed information fed back by the wind speed sensor 21 with pre-stored critical values such as an A line, a B line, a C line and the like, judging the range of the real-time wind speed of the fan 3, further determining the blocking state of the filtering device, and transmitting the judging result to the execution unit. The execution unit is used for controlling the fan 3 to increase the rotating speed or decrease the rotating speed according to the judgment result, or controlling the alarm unit to give an alarm, or controlling the water heater to stop working and the like.
The method specifically comprises the following steps:
and if the detected wind speed value is in the area between the line B and the line C, judging that the state of the filter device 10 is good, keeping the normal combustion state, not modifying the rotating speed of the fan 3, and maintaining the rotating speed of the fan 3.
If the detected wind speed value is below the line C, it is determined that the combustion is abnormal, and as shown in fig. 9, the wind speed needs to be decreased to return to the range between the line B and the line C, and as shown in fig. 8, the rotation speed of the fan 3 is in direct proportion to the wind speed, so that the controller 6 needs to control the rotation speed of the fan 3 to be decreased to return the wind speed to the range between the line B and the line C.
If the detected wind speed of the fan 3 is above the line B, as shown in fig. 9, the wind speed needs to be increased to return to the area between the line B and the line C, at this time, it is also necessary to first determine whether the fan 3 has exceeded its load range, for example, it is determined that the filtering device 10 is in a severe blockage state, at this time, the controller 6 controls the alarm device to alarm, and prompts the user to clean the filter. If the fan 3 is judged not to exceed the load range and the filtering device 10 is judged to be in a slight blockage state, the controller 6 controls the rotating speed of the fan 3 to be continuously increased, so that the wind speed falls back to the area ranges of the line B and the line C, and normal combustion is guaranteed.
Meanwhile, whether the wind speed is above a line D or not needs to be monitored, the line D is a limit value at which the water heater can keep working, if the wind speed exceeds the limit value of the line D, namely the filter 11 is blocked to the most serious state, normal air supply cannot be performed, and in order to ensure the safety of the water heater in the state, the water heater cannot continue to work, the controller 6 controls the fan 3 in the water heater to automatically stop working, the gas valve 2 is closed, and the alarm device gives an alarm. After the water heater is shut down, a step of determining whether to clean is set, and the water heater can be restarted only after the filtering device 10 is cleaned, so that the water heater can be continuously used.
As shown in fig. 10, the following detailed description of the anti-blocking control method specifically includes the following steps:
and electrifying the water heater to start using.
The fan 3 runs, ignites and burns, and the size of the opening of the gas valve 2 and the rotating speed of the fan 3 are adjusted according to the set temperature so as to realize the constant temperature control of the outlet water temperature.
A. The wind speed sensor 21 is used for monitoring the wind speed of the inlet wind in real time, and the detected wind speed information is fed back to the controller 6.
B. The controller 6 compares the fed-back wind speed measured value with a pre-stored wind speed and combustion load database, determines the blocking state of the filter device 10 according to the detected wind speed value, and correspondingly adjusts the rotation speed of the fan according to the blocking state.
The method specifically comprises the following steps:
b1, when the detected wind speed value is in the area between the upper limit value (line B) and the lower limit value (line C), determining that the state of the filter device 10 is good, maintaining the normal combustion state, and maintaining the rotation speed of the fan 3 without correcting the rotation speed of the fan 3;
b2, if the wind speed is not in the region between the upper limit value (line B) and the lower limit value (line C), it is necessary to determine whether the wind speed is greater than or equal to the upper limit value (line B) or less than or equal to the lower limit value (line C).
When the detected wind speed value is in a region higher than the upper limit value (line B), it is determined that the filter device 10 is in the clogged state, and in this case, it is necessary to determine the following two cases:
b21, firstly, judging whether the fan 3 exceeds the load range, when judging that the rated load of the fan motor is exceeded, judging that the filtering device 10 is in a serious blockage state, and controlling an alarm device to give an alarm by the controller 6 to remind a user to clean the filtering device 10.
B22, if the rotating speed of the fan 3 is judged not to exceed the load range and the filter device 10 is judged to be in a slight blockage state, the controller 6 controls to continuously increase the rotating speed of the fan 3 to enable the wind speed to fall back to the area range of the line B and the line C, and normal combustion is guaranteed.
When the detected wind speed value is in a region lower than the lower limit value (line C), it is determined that the combustion is abnormal, and the controller 6 controls to decrease the rotation speed of the fan 3.
When the controller 6 monitors that the wind speed is above the upper limit value (line B), whether the wind speed is above the limit value (line D) or not is monitored, if the wind speed exceeds the limit value (line D), the controller 6 controls the fan 3 in the water heater to automatically stop working, the gas valve 2 is closed, the alarm device gives an alarm, and in the working state, the filter 11 needs to be cleaned and then the water heater can be continuously recovered to be used.
Similar solutions can be derived from the solution given in the figures, as described above. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims (8)
1. A method for controlling clogging of a filter device, comprising the steps of:
A. monitoring the air inlet speed in real time by using a wind speed detection device;
B. judging the blocking state of the filtering device according to the detected wind speed value, and correspondingly adjusting the rotating speed of the fan according to the blocking state;
the step B specifically includes the following steps:
the upper limit value and the lower limit value of the wind speed are set in advance according to the corresponding relation function of the wind speed and the combustion load,
b1, when the detected wind speed value is in the area between the upper limit value and the lower limit value, judging that the state of the filter device is good, keeping the normal combustion state and maintaining the rotating speed of the fan;
b2, when the detected wind speed value is in the area higher than the upper limit value, judging that the filter device is in a blocking state, and increasing the rotating speed of the fan;
in the step B2, before increasing the rotation speed of the fan, the method further includes a step of judging whether the rated load of the fan motor is exceeded;
b21, when judging that the rated load of the fan motor is exceeded, judging that the filtering device is in a serious blockage state, triggering an alarm device, and reminding a user to clean the filtering device;
and B22, when judging that the rated load of the fan motor is not exceeded, judging that the filter device is in a light blockage state, and increasing the rotating speed of the fan.
2. The method of controlling clogging of a filter device according to claim 1, wherein: and step B, when the detected wind speed value is in a region lower than the lower limit value, judging that the combustion is abnormal, and reducing the rotating speed of the fan.
3. The method of controlling clogging of a filter device according to claim 1, wherein: and step B, a limit value of the wind speed is preset, whether the wind speed is in a region higher than the limit value is judged, and if the wind speed is in the region higher than the limit value, the equipment is directly closed.
4. A method of controlling clogging of a filter device according to claim 3, characterized in that: the method also comprises the step of judging whether the filtering device is cleaned or not, and the equipment can be restarted only after the filtering device is cleaned.
5. A control apparatus using the control method of clogging of a filtering apparatus according to any one of claims 1 to 4, characterized in that: the wind speed detection device is connected with the controller and used for monitoring the wind speed of inlet air, a storage unit, a judgment unit and an execution unit are arranged in the controller, wind speed critical values of different blocking states of the filtering device set according to a corresponding relation function of the wind speed and the combustion load are stored in the storage unit in advance, the judgment unit is used for comparing the wind speed value fed back by the wind speed detection device with the set wind speed critical values of all states and judging the blocking state of the filtering device according to the wind speed value, and the execution unit is used for correspondingly adjusting the rotating speed of the fan according to the judgment result.
6. The control device according to claim 5, characterized in that: the filter device is connected with the controller, and when the filter device is judged to be in a serious blockage state, the controller controls the alarm device to give an alarm.
7. The utility model provides a gas water heater, includes the shell, is provided with the air intake on the shell, installs filter equipment, its characterized in that in air intake department: further comprising a control device according to claim 5 or 6.
8. A gas water heater as defined in claim 7, wherein: the filter device comprises filter and collector, filter and collector pass through the mode of joint and install on the shell of water heater.
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| CN201710134975.7A CN108571825B (en) | 2017-03-08 | 2017-03-08 | Control method and control device for blockage of filtering device and gas water heater |
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| CN201710134975.7A CN108571825B (en) | 2017-03-08 | 2017-03-08 | Control method and control device for blockage of filtering device and gas water heater |
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| CN108571825B true CN108571825B (en) | 2021-03-09 |
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| FR2691110B1 (en) * | 1992-05-14 | 1995-08-04 | Valeo Thermique Habitacle | DEVICE FOR VENTILATING THE INTERIOR OF A VEHICLE. |
| JP2007298190A (en) * | 2006-04-27 | 2007-11-15 | Noritz Corp | Combustion device |
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