CN108344008B - Smoke exhaust ventilator and backflow detection method thereof - Google Patents
Smoke exhaust ventilator and backflow detection method thereof Download PDFInfo
- Publication number
- CN108344008B CN108344008B CN201710057815.7A CN201710057815A CN108344008B CN 108344008 B CN108344008 B CN 108344008B CN 201710057815 A CN201710057815 A CN 201710057815A CN 108344008 B CN108344008 B CN 108344008B
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- China
- Prior art keywords
- range hood
- gas detector
- backflow
- peculiar smell
- odor gas
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Classifications
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- 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
-
- 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
Abstract
The invention provides a range hood and a backflow detection method thereof. The range hood provided by the invention comprises a backflow detection system; the backflow detection system comprises a first odor gas detector (1) and a second odor gas detector (2); when the range hood operates, airflow sequentially flows through the second peculiar smell gas detector (2) and the first peculiar smell gas detector (1); the backflow detection system is set to determine that backflow occurs when the first odorous gas detector (1) detects odorous gas before the second odorous gas detector (2). By adopting the range hood scheme provided by the invention, the backflow situation can be found in time.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of range hoods and a backflow detection method of range hoods.
[ background of the invention ]
The reverse flow of the oil smoke in the public flue is a difficult problem which puzzles numerous families. Particularly, after the oil smoke in the public flue flows backwards, a general user is difficult to find out timely to take measures, and the backflow condition is further worsened. Even if the user can discover in time that the oil smoke flows backward, when taking counter measures, also need a large amount of manual operation, and intelligent degree is not high.
Unless otherwise supported by sufficient evidence, the prior art described herein is not meant to be an admission that such prior art is widely known to those of ordinary skill in the art to which the invention pertains prior to the filing date of this application.
[ summary of the invention ]
The invention provides an improved range hood and a backflow detection method thereof, and aims to solve at least one technical problem.
The invention provides a range hood, which comprises a backflow detection system; the backflow detection system comprises a first odor gas detector and a second odor gas detector; when the range hood operates, airflow sequentially flows through the second peculiar smell gas detector and the first peculiar smell gas detector; the backflow detection system is set to determine that backflow occurs when the first odorous gas detector detects odorous gas before the second odorous gas detector detects odorous gas. It should be noted here that this solution implies a precondition: when the backflow detection system performs backflow detection, the first odor gas detector and the second odor gas detector are both in working states. In addition, it should be noted that "the first odor gas detector detects the odor gas before the second odor gas detector" includes at least two cases: firstly, after the first odor gas detector detects odor gas, the second odor gas detector also detects odor gas within a certain time; secondly, after the first odor gas detector detects odor gas, the second odor gas detector does not detect odor gas within a certain time. By adopting the range hood scheme provided by the invention, the backflow situation can be found in time.
Optionally, the range hood is set to automatically operate to discharge the backward flowing odor gas if the backward flowing detection system determines that the backward flowing occurs when the range hood is in a standby state. Therefore, the intelligent backflow of the oil smoke can be handled intelligently.
Optionally, the backflow detection system operates only when the range hood is in an inoperative state.
Optionally, the system further comprises a prompting system configured to prompt the user when the backflow detecting system determines that backflow occurs. Therefore, the intelligent backflow of the oil smoke can be handled intelligently.
Optionally, the prompting system is provided with a display device and/or a voice playing device for prompting the user.
Optionally, the prompt system is provided with a prompt information wireless sending module.
Optionally, the system further comprises a fan; the first odor gas detector is arranged above the fan; the second odor gas detector is arranged below the fan.
Optionally, the wind pipe seat is further included; the first odor gas detector is arranged in the air duct base.
Optionally, the air pipe seat is provided with a check valve; when the range hood operates, airflow sequentially flows through the first peculiar smell gas detector and the check valve of the air pipe seat.
Optionally, the device further comprises an exhaust pipe and a common flue connecting piece which are connected with each other, wherein the common flue connecting piece is provided with a check valve; the first peculiar smell gas detector is arranged in the public flue connecting piece; when the range hood operates, airflow sequentially flows through the first peculiar smell gas detector and the check valve of the public flue connecting piece.
Optionally, the second odor gas detector is disposed at an air inlet of the range hood.
Optionally, the odorous gas comprises VOCs and/or PM2.5 and/or PM10 and/or water vapour and/or carbon monoxide and/or methane and/or nitrogen dioxide.
Optionally, the first odor gas detector and the second odor gas detector both include an air quality sensor, an ultrasonic sensor, a pressure sensor, or an optical sensor. Namely, the first odor gas detector and the second odor gas detector both comprise air quality sensors; or the first odor gas detector and the second odor gas detector both comprise ultrasonic sensors; or the first odor gas detector and the second odor gas detector both comprise pressure sensors; alternatively, the first and second odorous gas detectors each include an optical sensor.
Optionally, the first odor gas detector and the second odor gas detector are simultaneously turned on and simultaneously turned off.
The invention provides a backward flow detection method of a range hood, which comprises the following steps: a second detection point and a first detection point are sequentially arranged on a passage through which airflow formed when the range hood operates flows; detecting the odor gas at the second detection point and the first detection point simultaneously; and if the first detection point detects the peculiar smell gas before the second detection point, determining that the backflow occurs. And the air flow formed when the range hood operates firstly flows through the second detection point and then flows through the first detection point. Here, it should be noted that "the first detection point detects the odor gas before the second detection point" includes at least two cases: firstly, after the first detection point detects the odor gas, the second detection point also detects the odor gas within a certain time; secondly, after the first detection point detects the peculiar smell gas, the second detection point does not detect the peculiar smell gas within a certain time. By adopting the backflow detection method of the range hood, the backflow situation can be found in time.
It should be noted that the term "odor gas" as used herein is to be understood in a broad sense, and in particular embodiments, may be a narrow sense of "odor gas" or may be a non-odor gas or even a non-odor gas that may be used for the purposes of the back-flow detection of the present invention.
It should be noted that the directional expressions such as "upper", "lower", "ceiling" and "top" in the present invention are based on the usual use state of the range hood unless otherwise specified.
It should be noted that the appearances of "first" and "second" in this specification are for descriptive purposes only and are not intended to indicate relative importance; moreover, it is not a definition of the number of features that it defines; further, it is not a definition of a logical or sequential relationship to the features it defines.
The above summary of the present invention is not intended to describe all possible embodiments of the present invention. Throughout this application, guidance is provided through lists of examples, which can be used in various possible combinations.
[ description of the drawings ]
The invention is illustrated and explained only by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
figure 1 is a cross-sectional view of an embodiment of a range hood of the present invention.
Reference numerals:
the device comprises a first peculiar smell gas detector, a second peculiar smell gas detector, a 3-air pipe seat, a 4-common flue connecting piece, a 5-control module, a 6-centrifugal fan, a 7-exhaust pipe, an 8-common flue, a 9-human-computer interaction interface, a 10-smoke collecting hood and a 11-machine shell.
[ detailed description ] embodiments
In order to make the objects, solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and preferred embodiments. The individual drawings may not be as precise, in which case the text is referred to.
Example 1
The embodiment of the range hood provided by the invention comprises a smoke collecting hood 10, a shell 11, a centrifugal fan 6, an air pipe seat 3, an exhaust pipe 7, a common flue connecting piece 4, a man-machine interaction interface 9, a control module 5 and a backflow detection system, as shown in fig. 1.
The control module 5 is arranged on the top wall of the machine shell 11, the control module 5 is electrically connected to the centrifugal fan 6, and the human-computer interaction interface 9 is electrically connected to the control module 5. The human-computer interaction interface 9 is arranged on the smoke collecting hood 10 and used for a user to control the opening and closing of the smoke exhaust ventilator and gear selection. Specifically, a user inputs a control instruction through the human-computer interaction interface 9, the human-computer interaction interface 9 sends the control instruction to the control module 5, and the control module 5 controls the centrifugal fan 6 based on the control instruction so as to control the opening and closing of the range hood and gear selection.
The smoke collecting hood 10 is fixed below the machine shell 11, and the air duct base 3 is fixed on the top of the machine shell 11. The centrifugal fan 6 is disposed in the casing 11. The common flue connection 4 can be in closed communication with the common flue 8. Specifically, the common flue connecting piece 4 is provided with a check valve, when the range hood is in a non-running state, the check valve of the common flue connecting piece 4 is closed under a normal condition, and at the moment, the common flue connecting piece 4 is not communicated with the common flue 8; when the range hood is in an operating state, the check valve of the common flue connecting piece 4 is opened, and at the moment, the common flue connecting piece 4 is communicated with the common flue 8.
One end of the exhaust pipe 7 is connected to the common flue connection member 4, and the other end is connected to the duct base 3. When the range hood runs, airflow sequentially flows through the fume collecting hood 10, the centrifugal fan 6, the air pipe seat 3, the exhaust pipe 7 and the common flue connecting piece 4 and then flows into the common flue 8. By "range hood operation", it is understood that: the range hood works to realize the function of pumping and exhausting oil smoke. In the present embodiment, when the hood is operated, the centrifugal fan 6 of the hood is operated to exhaust the fumes.
The backflow detection system comprises a first odorous gas detector 1 and a second odorous gas detector 2, as shown in fig. 1. The backflow detection system is electrically connected to the control module 5. The first odor gas detector 1 is arranged above the fan, and the second odor gas detector 2 is arranged below the fan. Specifically, the second odor gas detector 2 is disposed at an air inlet of the range hood. The first odor gas detector 1 is arranged in the wind pipe base 3. The nozzle 3 is provided with a check valve. When the range hood operates, airflow sequentially flows through the second peculiar smell gas detector 2, the centrifugal fan 6, the first peculiar smell gas detector 1, the check valve of the air pipe seat 3, the exhaust pipe 7 and the public flue connecting piece 4 and then flows into the public flue 8. It should be noted that, when the range hood is in operation, the airflow flows through the air inlet and flows into the housing 11. The first and second odorous gas detectors 1 and 2 are simultaneously turned on and simultaneously turned off.
And the backflow detection system is set to determine that backflow occurs when the first odor gas detector 1 detects odor gas before the second odor gas detector 2. Because, normally, no backflow occurs, the oil smoke can only come from the kitchen, and the oil smoke from the kitchen can only flow through the second odor gas detector 2 first and then flow to the first odor gas detector 1, that is, the second odor gas detector 2 detects odor gas before the first odor gas detector 1 detects odor gas. When the reverse flow occurs, the reverse flow flows through the common flue connector 4, then flows into the exhaust pipe 7, then flows through the air duct base 3, then flows through the first odor gas detector 1, then flows through the centrifugal fan 6, and then flows through the second odor gas detector 2, as indicated by arrows in fig. 1. Of course, there may be a case where the backward flow airflow is weak, and the backward flow airflow only flows through the first odor gas detector 1 and does not flow to the second odor gas detector 2, which also belongs to the case where "the first odor gas detector 1 detects the odor gas before the second odor gas detector 2 detects the odor gas", and at this time, the backward flow detection system also determines that the backward flow occurs.
The first odor gas detector 1 and the second odor gas detector 2 adopt the same sensor, and specifically adopt the same air quality sensor. The odor gas detected by the air quality sensor comprises VOCs. VOCs, refers to volatile organic pollutants.
And the backflow detection system operates only when the range hood is in a standby state. Specifically, when the range hood is switched to a standby state, the backflow detection system automatically operates immediately; or after the range hood is switched to the standby state for a certain time, the backflow detection system automatically operates. And the range hood is set to automatically run for a certain time to exhaust the back flowing peculiar smell gas if the back flowing detection system determines that the back flowing occurs when the range hood is in a standby state. Specifically, when this smoke ventilator is in standby state, if the backward flow detecting system affirms that backward flow takes place, then backward flow detecting system sends the information transmission that "the backward flow takes place" to control module 5, and control module 5 then controls smoke ventilator automatic operation certain time based on this "the backward flow takes place" information to discharge the peculiar smell gas that flows backward. After the range hood automatically operates for a certain time, the range hood stops operating and enters a standby state again, and at the moment, the backflow detection system automatically operates at once again or automatically operates after waiting for a certain time to perform backflow detection again.
The foregoing is merely a preferred embodiment of the present invention and other embodiments may be devised by adding, deleting, modifying or replacing certain features. For example, the range hood may further include a prompt system configured to prompt the user when the backflow detection system determines that backflow has occurred. Specifically, the prompting system is provided with a display device and/or a voice playing device for prompting a user. The prompt system can also be provided with a prompt information wireless sending module. The prompt information wireless sending module is accessed to an internet of things system, preferably, the prompt information sent by the prompt information wireless sending module is finally sent to a user terminal of the internet of things system, and specifically, the user terminal can be a smart phone terminal or a computer terminal and the like. Furthermore, the user terminal receives the prompt message and then carries out prompt display, the user knows that the backflow occurs when seeing the prompt display, at the moment, the user can remotely control the operation of the range hood through the user terminal to discharge the backflow peculiar smell gas, and the user can also submit a repair application to the after-sale service network system through the user terminal. For another example, the first odor gas detector may be disposed in the common flue connection member; when the range hood operates, airflow sequentially flows through the check valves of the second peculiar smell gas detector, the first peculiar smell gas detector and the public flue connecting piece. As another example, the "odor gas" detected by the air quality sensor may include PM2.5 and/or PM10 and/or water vapor and/or carbon monoxide and/or methane and/or nitrogen dioxide. For another example, the first odor gas detector and the second odor gas detector may both detect odor gas by using ultrasonic sensors. For another example, the first odor gas detector and the second odor gas detector may both use pressure sensors to detect odor gases. For another example, the first odor gas detector and the second odor gas detector may both use optical sensors to detect odor gases. For another example, the backflow detecting system may operate only when the range hood is in a non-operating state. Specifically, the "non-operating state" includes a shutdown state and a standby state. For another example, the range hood may be configured to automatically operate to discharge the backward flowing odor gas until the first odor gas detector and the second odor gas detector do not detect the odor gas any more if the backward flowing detection system determines that the backward flowing occurs when the range hood is in the standby state. As another example, the user may control the operation and/or shutdown of the backflow detection system through a human-machine interface. For another example, the backflow detection system may automatically operate after the range hood is switched to the standby state and the second odor gas detector does not detect the odor gas.
Example 2
The invention also provides an embodiment of a backward flow detection method of the range hood, which comprises the following steps:
a second detection point and a first detection point are sequentially arranged on a passage through which airflow formed when the range hood operates flows;
when the range hood is in a standby state, odor gas detection is simultaneously carried out at the second detection point and the first detection point;
if the first detection point detects the peculiar smell gas before the second detection point, determining that the backflow occurs;
if the reverse flow is determined to occur, the range hood is controlled to operate to discharge the reverse flow of the odor gas.
For the range hood to which this embodiment of the backflow detection method is applied, please refer to the corresponding description of range hood embodiment 1.
The foregoing is merely a preferred embodiment of the present invention and other embodiments may be devised by adding, deleting, modifying or replacing certain features. For example, if the reverse flow is determined to occur, the user may be reminded.
It should be additionally noted that the present invention should not be construed as limited to the embodiments set forth above, but rather should be construed to cover all possible embodiments defined by the claims set forth below in connection with the disclosure of the specification. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention, unless the content of the technical solution of the present invention is departed from.
Claims (15)
1. A range hood, its characterized in that:
comprises a backflow detection system;
the backflow detection system comprises a first odor gas detector (1) and a second odor gas detector (2);
when the range hood operates, airflow sequentially flows through the second peculiar smell gas detector (2) and the first peculiar smell gas detector (1);
the backflow detection system is set to determine that backflow occurs when the first odorous gas detector (1) detects odorous gas before the second odorous gas detector (2).
2. The range hood of claim 1, wherein:
the range hood is set to automatically run to discharge the backward flowing peculiar smell gas if the backward flowing detection system determines that backward flowing occurs when the range hood is in a standby state.
3. The range hood of claim 1, wherein:
and the backflow detection system operates only when the range hood is in a non-operating state.
4. The range hood of claim 1, wherein:
the backflow detection system is used for detecting backflow of a user and sending the detection result to the user.
5. The range hood of claim 4, wherein:
the prompting system is provided with a display device and/or a voice playing device for prompting a user.
6. The range hood of claim 4, wherein:
the prompt system is provided with a prompt information wireless sending module.
7. The range hood of claim 1, wherein:
the device also comprises a fan;
the first peculiar smell gas detector (1) is arranged above the fan;
the second peculiar smell gas detector (2) is arranged below the fan.
8. The range hood of claim 1, wherein:
also comprises an air duct base (3);
the first peculiar smell gas detector (1) is arranged in the air duct base (3).
9. The range hood of claim 8, wherein:
the air pipe seat (3) is provided with a check valve;
when the range hood operates, airflow sequentially flows through the check valves of the first peculiar smell gas detector (1) and the air pipe seat (3).
10. The range hood of claim 1, wherein:
the device also comprises an exhaust pipe (7) and a common flue connecting piece (4) which are connected, wherein the common flue connecting piece (4) is provided with a check valve;
the first peculiar smell gas detector (1) is arranged in the public flue connecting piece (4);
when the range hood operates, airflow sequentially flows through the first peculiar smell gas detector (1) and the check valve of the public flue connecting piece (4).
11. The range hood of any one of claims 7 to 10, wherein:
the second peculiar smell gas detector (2) is arranged at an air inlet of the range hood.
12. The range hood of claim 1, wherein:
the off-flavor gases comprise VOCs and/or PM2.5 and/or PM10 and/or water vapor and/or carbon monoxide and/or methane and/or nitrogen dioxide.
13. The range hood of claim 1, wherein:
the first odor gas detector (1) and the second odor gas detector (2) respectively comprise an air quality sensor, an ultrasonic sensor, a pressure sensor or an optical sensor.
14. The range hood of claim 1, wherein:
the first odor gas detector (1) and the second odor gas detector (2) are started at the same time and are closed at the same time.
15. The backward flowing detection method of the range hood is characterized by comprising the following steps of:
a second detection point and a first detection point are sequentially arranged on a passage through which airflow formed when the range hood operates flows;
detecting the odor gas at the second detection point and the first detection point simultaneously;
and if the first detection point detects the peculiar smell gas before the second detection point, determining that the backflow occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057815.7A CN108344008B (en) | 2017-01-23 | 2017-01-23 | Smoke exhaust ventilator and backflow detection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057815.7A CN108344008B (en) | 2017-01-23 | 2017-01-23 | Smoke exhaust ventilator and backflow detection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108344008A CN108344008A (en) | 2018-07-31 |
| CN108344008B true CN108344008B (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710057815.7A Active CN108344008B (en) | 2017-01-23 | 2017-01-23 | Smoke exhaust ventilator and backflow detection method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN108344008B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780601B (en) * | 2017-11-13 | 2021-05-04 | 博西华电器（江苏）有限公司 | Range hood and control method thereof |
| CN111434996B (en) * | 2019-01-11 | 2022-06-21 | 宁波方太厨具有限公司 | Oil smoke buffer mechanism for range hood |
| CN110579317B (en) * | 2019-08-22 | 2021-05-18 | 宁波方太厨具有限公司 | Oil smoke leakage monitoring method of oil smoke purifying device |
| CN110594809B (en) * | 2019-08-22 | 2021-01-19 | 宁波方太厨具有限公司 | Method for monitoring backflow and leakage of oil smoke purification device |
| CN110848773B (en) * | 2019-10-08 | 2021-07-16 | 宁波方太厨具有限公司 | Anti-smoke-backflow monitoring method and anti-smoke-backflow monitoring system |
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| CN201246806Y (en) * | 2008-06-30 | 2009-05-27 | 上海市静安区第二中心小学 | Simple peculiar smell-proof invert pouring apparatus of cooking fume exhauster |
| CN101487602A (en) * | 2009-02-26 | 2009-07-22 | 上海理工大学 | Apparatus for reducing gas blow-by of cooking fume exhauster |
| CN202324536U (en) * | 2011-11-17 | 2012-07-11 | 东北石油大学 | Flue for building construction |
| CN202467114U (en) * | 2012-03-14 | 2012-10-03 | 东北石油大学 | High-rise housing exhaust pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63204048A (en) * | 1987-02-19 | 1988-08-23 | Fujita Corp | Full-automatic range hood with inverter |
| CN201246806Y (en) * | 2008-06-30 | 2009-05-27 | 上海市静安区第二中心小学 | Simple peculiar smell-proof invert pouring apparatus of cooking fume exhauster |
| CN101487602A (en) * | 2009-02-26 | 2009-07-22 | 上海理工大学 | Apparatus for reducing gas blow-by of cooking fume exhauster |
| CN202324536U (en) * | 2011-11-17 | 2012-07-11 | 东北石油大学 | Flue for building construction |
| CN202467114U (en) * | 2012-03-14 | 2012-10-03 | 东北石油大学 | High-rise housing exhaust pipeline |
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| CN108344008A (en) | 2018-07-31 |
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