CN111322647B - Flue smoke exhaust system and control method thereof - Google Patents
Flue smoke exhaust system and control method thereof Download PDFInfo
- Publication number
- CN111322647B CN111322647B CN201811540460.8A CN201811540460A CN111322647B CN 111322647 B CN111322647 B CN 111322647B CN 201811540460 A CN201811540460 A CN 201811540460A CN 111322647 B CN111322647 B CN 111322647B
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- Prior art keywords
- electromagnetic chuck
- range hood
- power
- current
- valve
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- 239000000779 smoke Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 11
- 238000001514 detection method Methods 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 241000208125 Nicotiana Species 0.000 claims description 6
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000003517 fume Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
-
- 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
- F23J11/02—Devices for conducting smoke or fumes, e.g. flues for conducting smoke or fumes originating from various locations to the outside, e.g. in locomotive sheds, in garages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ventilation (AREA)
Abstract
A flue smoke exhaust system comprises a public flue, a range hood, a smoke pipe and a fireproof valve, wherein an air outlet of the range hood is communicated with the public flue through the smoke pipe and the fireproof valve, the fireproof valve comprises a valve body arranged on an outlet end of the smoke pipe and a valve block arranged on the valve body, the range hood further comprises an electromagnetic chuck and a power detection socket, the electromagnetic chuck is used for sucking the valve block at the maximum opening angle, the electromagnetic chuck is electrically connected with the power detection socket so that the power detection socket supplies power for the electromagnetic chuck, and a plug of the range hood is inserted into the power detection socket so that the power detection socket detects the power of the range hood. The flue smoke exhaust system sucks the valve block through the electromagnetic chuck, so that the valve block is not easy to swing due to air flow interference, the power of the range hood is absorbed through the power detection socket, the output current of the electromagnetic chuck is compensated in a feedback mode, the electromagnetic force is adjusted, the insufficient air pressure caused by sudden change of air volume caused by gear change of the range hood is compensated, and the air pressure and the magnetic force can balance the gravity of the valve block.
Description
Technical Field
The invention relates to a smoke exhaust system, in particular to a smoke exhaust system of a flue and a control method thereof.
Background
In a kitchen using the longitudinal public flue, in order to prevent oil smoke in the flue from flowing back into the kitchen, a fire damper is arranged between an air outlet pipe orifice of the range hood and the public flue. The existing fire damper generally comprises an oil smoke channel formed by a shell, the oil smoke channel is provided with an air inlet and an air outlet which are opposite, the air inlet is connected with an air outlet pipe orifice of the range hood, the air outlet extends into a public flue, an openable valve block is arranged at the air outlet of the oil smoke channel, and the valve block is rotatably arranged on the inner wall of the oil smoke channel through a valve block rotating shaft which is horizontally arranged. When the range hood is not used, the valve plate is in a closed position due to the gravity of the valve plate, and the valve plate covers the air outlet part; when the range hood is used, the valve plate is opened along with the air flow, the valve plate is located at the opening position, and the valve plate is far away from the air outlet. As a plurality of users share one longitudinal public flue gas channel, once a fire disaster happens to one household, a large amount of high-temperature harmful gas flows into the longitudinal public flue gas channel, and if a valve plate in a flue check valve is not closed in time, the large amount of high-temperature harmful gas can enter the household using the range hood through an oil smoke channel of the flue check valve, so that the life safety of the household is threatened.
The range hood of the high-rise common flue starting simultaneously is more, flow fluctuation is easy to cause, the valve plate of the general fire damper is opened along with the air flow in the starting state of a user, the service life is longer than that of an electric valve body, and the valve plate is durable. In addition, under the condition that the back pressure of the flue is large, the valve plate may not be opened in place, and the opening degree of the valve plate is seriously influenced, so that the smoke exhaust capacity of the range hood is reduced.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a stable and reliable flue smoke discharging system in view of the above-mentioned current state of the art.
The second technical problem to be solved by the present invention is to provide a method for controlling a flue gas exhaust system, which can reliably open a valve plate by power feedback, in view of the above-mentioned current state of the art.
The technical scheme adopted by the invention for solving the technical problems is as follows: this flue system of discharging fume, including range hood, tobacco pipe, fire prevention valve and public flue, the fire prevention valve is including installing the valve block on the valve block with installing on the valve block on the tobacco pipe exit end, the range hood air outlet loops through tobacco pipe and fire prevention valve are linked together its characterized in that with public flue: the range hood is characterized by further comprising an electromagnetic chuck and a power detection socket, wherein the electromagnetic chuck is used for sucking the valve plate at the maximum opening angle, the electromagnetic chuck is electrically connected with the power detection socket, so that the power detection socket can supply power to the electromagnetic chuck, and a plug of the range hood is inserted into the power detection socket, so that the power detection socket can detect the power of the range hood.
Preferably, the bottom of the electromagnetic chuck is provided with two switch contacts, the valve plate is a metal valve plate, and the valve plate is in contact with the switch contacts in the state that the valve plate is sucked by the electromagnetic chuck. Therefore, after the valve plate is sucked by the electromagnetic chuck, the electromagnetic chuck can be conducted.
Preferably, the electromagnetic chuck is arranged in the common flue and close to the upper part of the valve body. Therefore, the electromagnetic chuck is reasonable in position arrangement, and the valve plate can be smoothly sucked by the electromagnetic chuck after being opened.
Preferably, the power detection socket is electrically connected with the electromagnetic chuck through a wire.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the control method of the flue smoke exhaust system is characterized by comprising the following steps:
firstly, the power detection socket is standby;
secondly, comparing the power N of the range hood with the set value g multiplied by N1,
if N is larger than or equal to gxN 1, starting the system, conducting the default current of the electromagnetic chuck, waiting for time t1, and waiting for the full start of the range hood;
if N < gxN 1, the system is closed and returns to the step two; g is a coefficient;
thirdly, detecting whether the electromagnetic chuck sucks the valve plate or not after the range hood is completely started;
fourthly, if the electromagnetic chuck sucks the valve plate, detecting the power of the current range hood;
if the electromagnetic chuck does not suck the valve plate, judging whether the current gear of the range hood is the maximum;
if the current of the electromagnetic chuck is in the maximum gear, judging whether the current of the electromagnetic chuck is maximum, if so, prompting maintenance, and if not, increasing the current of the electromagnetic chuck and repeating the step three;
if not, increasing the gear and repeating the step (c);
estimating the current air quantity Q according to the detected power of the range hood in the step IV and reading the current I of the electromagnetic chuck;
sixthly, judging whether the current air quantity and the power supply of the electromagnetic chuck are enough or not,
if I is larger than or equal to k/Q, the air volume is larger, the electromagnetic chuck keeps the original input current and suction force, and the step II is returned;
if I < k/Q, the air volume is small, the current of the electromagnetic chuck is increased, the suction force is compensated, and the step IV is returned; k is a coefficient.
Preferably, N1 in step (ii) is the power value of the lowest gear of the range hood.
Compared with the prior art, the invention has the advantages that: this flue system of discharging fume will be in the valve block of the biggest opening angle and catch through electromagnet, make the valve block be difficult to receive the air current interference and swing, in addition, through the power of power detection socket range hood, and feedback compensation electromagnet output current size, and then adjust the electromagnetic force, compensate the wind pressure that the amount of wind sudden change that range hood gear change leads to arouses the not enough condition, make the gravity of valve block can be balanced to wind pressure and magnetic force, ensure that electromagnet can catch the valve block reliably, make and discharge fume and go on smoothly.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a power-flow graph of a range hood;
FIG. 4 is a graph of back pressure resistance at different turn-on rates;
FIG. 5 is a logic diagram of a control method according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 and fig. 2, the flue gas discharging system of the present embodiment includes a range hood 1, a smoke pipe 2, a fire damper 3, a common flue 4, an electromagnetic chuck 5, and a power detection socket 6.
The fire damper 3 comprises a mounting valve body 31 and a valve plate 32, the valve body 31 is mounted at the outlet end of the smoke tube 2, the valve plate 32 is mounted on the valve body 31, and the air outlet of the range hood 1 is communicated with the common flue 4 sequentially through the smoke tube 2 and the fire damper 3. When the range hood 1 works, generated oil smoke is discharged into the common flue 4 through the smoke pipe 2 and the fire damper 3. The above structure is the same as the existing flue gas exhaust system, and will not be described herein.
In this embodiment, the electromagnetic chuck 5 is disposed in the common flue 4 and close to the upper portion of the valve body 31, and the electromagnetic chuck 5 is electrically connected to the power detection socket 6 through the wire 7, so that the power detection socket 6 can supply power to the electromagnetic chuck 5. The bottom of the electromagnetic chuck 5 has two switch contacts (not shown), and the valve plate 32 is a metal valve plate. Under the condition that the range hood 1 is started, the valve plate 32 is blown up under the action of air flow, the valve plate 32 is close to the electromagnetic chuck 5 after being opened to the maximum angle, the electromagnetic chuck 5 sucks the valve plate 32, and the valve plate 32 is in contact with the switch contact, so that the electromagnetic chuck 5 is conducted and has a switch function after being conducted. The gravity of the valve plate 32 is kept stable under the resultant force of the wind pressure and the electromagnetic chuck 5, once the range hood 1 is shut down, the valve plate 32 falls down due to the fact that the gravity is larger than the suction force of the electromagnetic chuck 5 and is further separated from a switch contact of the electromagnetic chuck 5, and the valve plate 32 is closed due to the gravity
The plug 11 of the range hood 1 is plugged into the power detection socket 6 and connected with the mains supply, so that the power detection socket 6 can detect the power of the range hood 1.
As shown in fig. 3, the power-flow curve of the range hood 1 is a monotone increasing function.
As shown in fig. 4, the variation of the opening rate causes a large variation of the flue back pressure resistance, and the resistance curves S1 and S2, the S1 curve is generally the back pressure resistance curve in the case of the opening rate of 60% or more, and the S2 curve is the back pressure resistance curve in the case of the opening rate of about 30%. Because the user opens the range hood and does not always open the highest gear at every turn, therefore when high turn-on probability + user opened lower gear, very easy emergence valve block blows off the angle not big enough, has to open the problem in place.
In addition, the range hood generally has a plurality of gears and air volume, and the difference between high and low gears is large, such as high-grade 20m3The practical test of the lowest gear can only be 8m at/min and 800Pa3Min, 200Pa, for ordinary electromagnetic chuck scheme, if magnetic force is too little, then can't rely on wind pressure and magnetic force balanced gravity when low-gear work, if magnetic force is too big, then also can have the updraft because other users start in the flue, after this range hood shuts down, updraft in the public flue plus electromagnetic chuck's magnetic force can make the valve body be in open state to lose sealed effect.
In order to solve the above problems, the present embodiment provides a control method for a flue gas exhaust system, in which a power detection socket 6 is introduced, and during installation, the power N2 at the highest gear and the power N1 at the lowest gear of the range hood 1 are recorded, so as to facilitate subsequent automatic adjustment, and the control method is generally used for any range hood.
As shown in fig. 5, the control method specifically includes the following steps:
firstly, the power detection socket is standby;
secondly, comparing the power N of the range hood with the set value g multiplied by N1,
if N is larger than or equal to gxN 1, starting the system, conducting the default current of the electromagnetic chuck, waiting for time t1, and waiting for the full start of the range hood;
if N < gxN 1, the system is closed and returns to the step two; g is a coefficient;
thirdly, detecting whether the electromagnetic chuck sucks the valve plate or not after the range hood is completely started;
fourthly, if the electromagnetic chuck sucks the valve plate, detecting the power of the current range hood;
if the electromagnetic chuck does not suck the valve plate, judging whether the current gear of the range hood is the maximum;
if the current of the electromagnetic chuck is in the maximum gear, judging whether the current of the electromagnetic chuck is maximum, if so, prompting maintenance, and if not, increasing the current of the electromagnetic chuck and repeating the step three;
if not, increasing the gear and repeating the step (c);
estimating the current air quantity Q according to the detected power of the range hood in the step IV and reading the current I of the electromagnetic chuck;
sixthly, judging whether the current air quantity and the power supply of the electromagnetic chuck are enough or not,
if I is larger than or equal to k/Q, the air volume is larger, the electromagnetic chuck keeps the original input current and suction force, and the step II is returned;
if I < k/Q, the air volume is small, the current of the electromagnetic chuck is increased, the suction force is compensated, and the step IV is returned; k is a coefficient.
After the control method is adopted, the power of the range hood of the socket can be detected through the power, the output current of the electromagnetic chuck is fed back and compensated, the electromagnetic force is further adjusted, the insufficient wind pressure condition caused by the sudden change of wind volume caused by the gear change of the range hood is compensated, the wind pressure and the magnetic force can balance the gravity of the valve block, the electromagnetic chuck can reliably suck the valve block, and the smoke exhaust can be smoothly carried out.
Claims (5)
1. The utility model provides a flue system of discharging fume, includes range hood (1), tobacco pipe (2), fire prevention valve (3) and public flue (4), fire prevention valve (3) are including installing valve block (31) on tobacco pipe (2) exit end and installing valve block (32) on the valve block, range hood (1) air outlet loops through tobacco pipe (2) and fire prevention valve (3) are linked together its characterized in that with public flue (4): still including electromagnet (5) and power detection socket (6), electromagnet (5) are used for holding valve block (32) that are in the biggest opening angle, electromagnet (5) with power detection socket (6) are connected mutually and make power detection socket (6) can be for electromagnet (5) power supply, plug (11) of range hood (1) are inserted on power detection socket (6) and make power detection socket (6) can detect the power of range hood (1).
2. The flue smoke evacuation system of claim 1, wherein: the bottom of the electromagnetic chuck (5) is provided with two switch contacts, the valve plate (32) is a metal valve plate, and the valve plate (32) is contacted with the switch contacts in the state that the valve plate (32) is sucked by the electromagnetic chuck (5).
3. The flue smoke evacuation system of claim 1, wherein: the electromagnetic chuck (5) is arranged in the common flue (4) and is close to the upper part of the valve body (31).
4. The flue smoke evacuation system of claim 1, wherein: the power detection socket (6) is electrically connected with the electromagnetic chuck (5) through a lead (7).
5. A control method of a flue gas exhaust system according to any one of claims 1 to 4, characterized by comprising the steps of:
firstly, the power detection socket is standby;
secondly, comparing the power N of the range hood with the set value gxN 1;
if N is larger than or equal to gxN 1, starting the system, conducting the default current of the electromagnetic chuck, waiting for time t1, and waiting for the full start of the range hood;
if N < gxN 1, the system is closed and returns to the step two; g is a coefficient;
thirdly, detecting whether the electromagnetic chuck sucks the valve plate or not after the range hood is completely started;
fourthly, if the electromagnetic chuck sucks the valve plate, detecting the power of the current range hood;
if the electromagnetic chuck does not suck the valve plate, judging whether the current gear of the range hood is the maximum;
if the current of the electromagnetic chuck is in the maximum gear, judging whether the current of the electromagnetic chuck is maximum, if so, prompting maintenance, and if not, increasing the current of the electromagnetic chuck and repeating the step three;
if not, increasing the gear and repeating the step (c);
estimating the current air quantity Q according to the detected power of the range hood in the step IV and reading the current I of the electromagnetic chuck;
sixthly, judging whether the current air quantity and the power supply of the electromagnetic chuck are enough or not,
if I is larger than or equal to k/Q, the air volume is larger, the electromagnetic chuck keeps the original input current and suction force, and the step II is returned;
if I < k/Q, the air volume is small, the current of the electromagnetic chuck is increased, the suction force is compensated, and the step IV is returned; k is a coefficient;
and N1 in the step II is the power value of the lowest gear of the range hood (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540460.8A CN111322647B (en) | 2018-12-17 | 2018-12-17 | Flue smoke exhaust system and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811540460.8A CN111322647B (en) | 2018-12-17 | 2018-12-17 | Flue smoke exhaust system and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111322647A CN111322647A (en) | 2020-06-23 |
| CN111322647B true CN111322647B (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811540460.8A Active CN111322647B (en) | 2018-12-17 | 2018-12-17 | Flue smoke exhaust system and control method thereof |
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| Country | Link |
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| CN (1) | CN111322647B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114234249B (en) * | 2021-12-17 | 2023-12-08 | 杭州老板电器股份有限公司 | Control method and device for identifying flue state |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603607A (en) * | 2009-07-06 | 2009-12-16 | 宁波方太厨具有限公司 | A kind of external flue check valve |
| CN102353083A (en) * | 2011-08-15 | 2012-02-15 | 宁波方太厨具有限公司 | Range hood air outlet pipe capable of preventing smoke from returning |
| CN102644953A (en) * | 2011-02-22 | 2012-08-22 | 浙江帅康电气股份有限公司 | Taste-return prevention range hood |
| CN108180518A (en) * | 2017-12-08 | 2018-06-19 | 九阳股份有限公司 | A kind of kitchen ventilator outlet housing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070089731A1 (en) * | 2005-10-26 | 2007-04-26 | Mine-Sweeper Industrial Co., Ltd. | Range hood |
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2018
- 2018-12-17 CN CN201811540460.8A patent/CN111322647B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101603607A (en) * | 2009-07-06 | 2009-12-16 | 宁波方太厨具有限公司 | A kind of external flue check valve |
| CN102644953A (en) * | 2011-02-22 | 2012-08-22 | 浙江帅康电气股份有限公司 | Taste-return prevention range hood |
| CN102353083A (en) * | 2011-08-15 | 2012-02-15 | 宁波方太厨具有限公司 | Range hood air outlet pipe capable of preventing smoke from returning |
| CN108180518A (en) * | 2017-12-08 | 2018-06-19 | 九阳股份有限公司 | A kind of kitchen ventilator outlet housing |
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| Publication number | Publication date |
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| CN111322647A (en) | 2020-06-23 |
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