CN115289045A - Roof fan and control method thereof - Google Patents

Roof fan and control method thereof Download PDF

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Publication number
CN115289045A
CN115289045A CN202210980882.7A CN202210980882A CN115289045A CN 115289045 A CN115289045 A CN 115289045A CN 202210980882 A CN202210980882 A CN 202210980882A CN 115289045 A CN115289045 A CN 115289045A
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China
Prior art keywords
fan
alarm
air outlet
sensor
control module
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CN202210980882.7A
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Chinese (zh)
Inventor
巫澄宇
龚定
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Jiangxi Tuoyu Industrial Co ltd
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Jiangxi Tuoyu Industrial Co ltd
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Priority to CN202210980882.7A priority Critical patent/CN115289045A/en
Publication of CN115289045A publication Critical patent/CN115289045A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/002—Details, component parts, or accessories especially adapted for elastic fluid pumps
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ventilation (AREA)

Abstract

The invention relates to a roof fan and a control method thereof, and belongs to the technical field of exhaust passage systems. The air conditioner comprises a main mounting body shell, an air inlet, an air outlet, a fan, a control module and a sensor; the air outlet comprises a main air outlet and an auxiliary air outlet, the main air outlet is arranged at one end of the fan air outlet, and the auxiliary air outlet is arranged on the upper portion of the main body shell. And the control module compares the set threshold value with the feedback value of the sensor to control the start and stop of the fan or give an abnormal alarm.

Description

Roof fan and control method thereof
Technical Field
The invention relates to a roof fan and a control method thereof, and belongs to the technical field of exhaust passage systems.
Background
The air outlet of the public smoke exhaust channel of the residential kitchen is provided with a rainproof roof hood. Generally, an unpowered hood is adopted, the wind-pulling effect of the hood is weak, congestion is easily formed during dense smoke exhaust, the smoke exhaust of residents is not smooth, even the smoke flows backwards, and adverse effects are generated on the health of the residents and the home environment.
The roof fan is adopted to replace an unpowered hood, so that the smoke discharge congestion phenomenon can be improved, because the kitchen use time of each household is not uniform, the peak period of dense oil smoke discharge has certain randomness, and the roof fan needs to be started as required; when the fan fails, the public flue has certain smoke exhaust capacity; the fan alarm system has an automatic alarm function, and when the fan fails, an alarm is automatically given to inform related personnel of providing services in time.
Therefore, realizing the functions becomes the object and direction of seeking breakthrough in the prior art.
Disclosure of Invention
The invention aims to provide a roof fan and a control method thereof, which have the functions of automatically opening and closing the fan and automatically alarming when the fan fails.
In order to achieve the purpose, the invention adopts the following technical scheme:
a roof fan comprises a main body shell, an air inlet, an air outlet, a fan, a control module and a sensor;
the air outlet comprises a main air outlet and an auxiliary air outlet, wherein the main air outlet is arranged at the air outlet end of the fan, and the auxiliary air outlet is arranged at the upper part of the main body shell;
the collection point of the sensor is arranged below the air inlet.
And the controller realizes the control of starting and stopping of the fan or abnormal alarming according to the comparison of the set threshold value and the feedback value of the sensor.
Further, the fan is an axial flow fan or a centrifugal fan;
the fan and the main body shell can be of an integral structure or a split structure.
Further, the sensor is one or more of a pressure sensor and an oil smoke sensor.
Furthermore, the electric power of the roof fan is connected to the mains supply or the solar power supply.
A control method of a roof fan comprises the following steps:
s1: the control module is provided with a starting threshold, a detection period and an operation period;
s2: in the detection period, when the feedback value of the sensor is greater than or equal to the starting threshold value, the control module drives the fan to start to enter the running period, and the fan automatically stops when the running period is finished;
s3: the control module is provided with an alarm signal output unit, and the output of the alarm signal unit can be triggered by an alarm threshold value set by the control module or an independent fan stop alarm module;
when the alarm threshold is adopted for triggering: when the fan is in the operation period and the feedback value of the sensor is greater than or equal to the alarm threshold value, the abnormality is judged to occur, and the alarm signal output unit sends out an alarm signal.
When the fan halt alarm module is adopted for triggering: when the fan is in the operation period, the fan stop alarm module monitors that the fan is stopped, and if the fan is judged to be abnormal, the alarm signal output unit sends an alarm signal.
Further, in step S3: the output mode of the alarm signal is one or more of sound alarm, light alarm, short message alarm, mobile phone APP alarm and cloud platform alarm.
Further, the ID of the control module may be named by one or more of doorplate address information, latitude and longitude information, and landmark orientation information.
Furthermore, the control module modifies the operation curve of the fan by adjusting parameters such as the detection period, the operation period and the starting threshold value, so that the frequent start and stop of the fan are avoided, and the system works more smoothly.
The invention has the following beneficial effects: the scheme has the functions of automatically opening and closing the roof fan as required and automatically alarming when the fan fails; especially, when the household range hood is low in simultaneous starting rate and is not enough to trigger the roof fan to start or break down, the oil smoke is naturally discharged from the auxiliary air outlet.
Drawings
Fig. 1 is a schematic structural view of a roof fan in embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a roof fan in embodiment 2 of the present invention.
In the figure: 1. a main body housing; 2. an air inlet; 3. an air outlet; 4. a fan; 5. control module, 6, sensor.
Detailed Description
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Example 1:
referring to fig. 1, a roof fan includes a main body housing 1, an air inlet 2, an air outlet 3, a fan 4, a control module 5, a sensor 6, and the like.
The main body shell 1 is cylindrical, the fan 4 is an axial flow fan, and the two are of an integral structure; the air outlet 3 is arranged at the upper part of the main body shell 1 and is of a cap-shaped structure; the air outlet 3 is a main air outlet 3-1 and an auxiliary air outlet 3-2; the control module 5 is respectively connected with the fan 4 and the sensor 6; the sensor 6 adopts a wind pressure transmitter, and a collection point of the sensor 6 is arranged below the air inlet 2; the power access mode is commercial power.
Preferably, the alarm signal output unit adopts an alarm threshold triggering mode, and the alarm signal is sent in a remote cloud platform mode.
For ease of understanding, the following table illustrates the operating conditions.
Table 1:
Figure DEST_PATH_IMAGE002
further, in the present embodiment, according to the working conditions described in table 1, the detection period T1=10 is set, that is, 1 detection time per 10 seconds; setting an operation period T2=120, namely, operating for 120 seconds each time; setting a starting threshold TH1=200, namely, triggering starting when a feedback value reaches 200 Pa; and setting an alarm threshold TH2=400, namely, triggering an alarm when the feedback value reaches 400 Pa.
Further, when the pressure value of the acquisition point of the sensor 6 is greater than or equal to 200Pa, the control module 5 drives the fan 4 to start, and the fan 4 enters the operation period and operates for 2 minutes at regular time; and in the operation period, when the pressure value is detected to be more than or equal to 200Pa again, triggering a new operation period and covering the previous operation period, and timing the fan 4 again to operate for 2 minutes.
Further, when the simultaneous on-duty ratio is not high, the pressure value of the collection point is lower than 200Pa even reaching negative pressure when the fan 4 is in the running state, and the condition of triggering the start threshold value is not met. When the operation period is over, the fan 4 automatically stops, if the extractor hood of the household kitchen is still in the starting state at the moment, along with the stop of the fan 4, the pressure value of the collection point can gradually rise back in the slow deceleration process of the fan blade, and when the pressure value rises back to 200Pa, the trigger condition is reached, the fan 4 is started again, and the next cycle is started.
Further, when the operation cycle is finished and the fan 4 is automatically stopped, if the extractor hoods in the kitchens of the residents are all in a shutdown state or are in a low startup rate at the same time, the pressure value of the collection point cannot reach 200Pa, and the fan 4 is kept in a shutdown state because the triggering condition cannot be reached.
Further, when fan 4 was in the operating cycle, when the pressure value of the acquisition point of sensor 6 was more than or equal to 400Pa, then judged that unusual appeared, alarm signal output unit valve goes out alarm signal, and alarm signal adopts the online long-range sending of cloud platform, and at this moment, cloud platform or staff's cell-phone APP end all can receive the alarm information that ID is "01 family type of a certain unit in a certain district of a certain way in a certain city" to relevant personnel in time accurately arrive at the scene and investigate the trouble.
Particularly, when the fan 4 keeps a stop state or fails, oil smoke is naturally discharged from the sparse blades of the axial flow fan through the auxiliary air outlet 3-2.
Example 2:
referring to fig. 2, the roof fan includes a main body housing 1, an air inlet 2, an air outlet 3, a fan 4, a control module 5, a sensor 6, and the like. Wherein the main body shell 1 is square, the fan 4 is a centrifugal fan, and the two are in a split structure; the main air outlet 3-1 is arranged on one side of the air outlet of the centrifugal fan and is subjected to rainproof treatment; the auxiliary air outlet 3-2 is arranged at the upper part of the main body shell 1 and is of a movable louver structure; the sensor 6 is a wind pressure transmitter, and the collection point is arranged below the air inlet 2; the power access mode is commercial power.
As shown in fig. 2, when the fan 4 operates, the movable louver structure of the auxiliary air outlet 3-2 is synchronously closed, the drawn oil smoke is actively discharged from the main air outlet 3-1, and when the fan 4 stops, the louver device of the auxiliary air outlet 3-2 is reset to be opened.
Particularly, when the household range hood is low in simultaneous starting rate, the pressure value is not enough to trigger the starting threshold TH1, or the household range hood fails, smoke is naturally discharged through the auxiliary air outlet 3-2.
The rest is the same as example 1.
Example 3:
a roof fan comprises a main body shell 1, an air inlet 2, an air outlet 3, a fan 4, a control module 5, a sensor 6 and the like. The main body shell 1 is cylindrical, the fan 4 is an axial flow fan, the two are integrated, and the air outlet 3 is arranged at the upper part of the main body shell 1 and is of a cap-shaped structure; the air outlet 3 is a main air outlet 3-1 and an auxiliary air outlet 3-2; the sensor 6 is an oil smoke sensor, and the sampling point is arranged below the air inlet 2; the alarm signal output unit adopts a fan stop alarm module triggering mode, and the alarm signal adopts an acousto-optic alarm + short message alarm mode; the power access mode is commercial power.
Further, in the present embodiment, according to the working conditions described in table 1, the detection period T1=5 is set, that is, 1 detection time every 5 seconds; setting an operation period T2=120, namely, 120 seconds of operation each time; setting a starting threshold TH1=3, namely, a feedback value reaches 3mg/m 3 Triggering and starting.
Further, when the smoke concentration of the collection point of the sensor 6 is more than or equal to 3mg/m 3 When the running time is up, the control module 5 drives the fan 4 to start, and the fan 4 enters the running period to run for 2 minutes at regular time; in the operation period, the smoke concentration is detected to be more than or equal to 3mg/m again 3 And triggering a new operation period and covering the previous operation period, and timing and operating the fan 4 for 2 minutes again.
Further, when the fan 4 is stopped after the operation period T2 is finished, and the fan blade is slowly decelerated, if the flue gas concentration at the collection point rises again at this time, the condition of triggering the start threshold is reached, the fan 4 is continuously started, otherwise, the fan 4 is kept in a stop state.
Further, when the fan 4 is in the operation period T2, the fan stop alarm module monitors that the fan is stopped, and then determines that the system is abnormal, the alarm signal output unit outputs an alarm signal, and at this time, the sound and light alarm device operates, and related personnel receive an alarm short message showing that "a certain unit of a certain cell of a certain path of a certain district of a certain city is 01 house type".
In all the embodiments mentioned above, the preferred embodiment of the present invention is only mentioned, but the protection scope of the present invention is not limited thereto, and any person skilled in the art should be covered by the protection scope of the present invention within the technical scope disclosed in the present invention, and equivalent substitutions or changes according to the technical solutions of the present invention and the inventive concept thereof.

Claims (8)

1. A roof fan comprises a main body shell (1), an air inlet (2), an air outlet (3), a fan (4), a control module (5) and a sensor (6);
the method is characterized in that: the air outlet (3) comprises a main air outlet (3-1) and an auxiliary air outlet (3-2), wherein the main air outlet (3-1) is arranged at the air outlet end of the fan (4), the auxiliary air outlet (3-2) is arranged at the upper part of the main body shell (1), the input end of the control module (5) is connected with the sensor (6), the output end of the control module is connected with the fan (4), and the collection point of the sensor (6) is arranged below the air inlet (2).
2. The roof fan of claim 1, wherein: the fan (4) is an axial flow fan or a centrifugal fan;
the fan (4) and the main body shell (1) are of an integral structure or a split structure.
3. The roof fan of claim 1, wherein: the sensor (6) is one or more of a pressure sensor and an oil smoke sensor.
4. The roof fan of claim 1, wherein: the electric power of the roof fan is connected to the commercial power or the solar power supply.
5. A method of controlling a roof fan according to claims 1 to 4, characterised in that:
s1: the control module (5) is set with a starting threshold (TH 1), a detection period (T1) and an operation period (T2);
s2: the control module (5) drives the fan (4) to start to enter the operation period (T2) when detecting that the feedback value of the sensor (6) is greater than or equal to the starting threshold (TH 1) in the detection period (T1), and the fan (4) is stopped when the operation period (T2) is finished.
6. The method of controlling a roof fan of claim 5, wherein:
step S3 is arranged after step S2;
s3: the control module (5) is provided with an alarm signal output unit, and the output of the alarm signal output unit can be triggered by an alarm threshold (TH 2) or a fan stop alarm module;
when triggered by adopting an alarm threshold value: the alarm threshold (TH 2) is set by the control module (5), when the fan (4) is in the operation period (T2) and the feedback value of the sensor (6) is greater than or equal to the alarm threshold (TH 2), the abnormality is judged to occur, and the alarm signal output unit sends out an alarm signal;
when the fan halt alarm module is adopted for triggering: the fan stop alarm module is a commercially available part, when the fan (4) is in the operation period (T2), the fan stop alarm module monitors the fan stop, and then the abnormal condition is judged, and the alarm signal output unit sends out an alarm signal.
7. The method of controlling a roof fan of claim 6, wherein: in step S4: the output mode of the alarm signal is one or more of sound alarm, light alarm, short message alarm, mobile phone APP alarm and cloud platform alarm.
8. The method of controlling a roof fan of claim 6, wherein: the ID of the control module (5) is named by one or more combinations of doorplate address information, longitude and latitude information and landmark orientation information.
CN202210980882.7A 2022-08-16 2022-08-16 Roof fan and control method thereof Pending CN115289045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210980882.7A CN115289045A (en) 2022-08-16 2022-08-16 Roof fan and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210980882.7A CN115289045A (en) 2022-08-16 2022-08-16 Roof fan and control method thereof

Publications (1)

Publication Number Publication Date
CN115289045A true CN115289045A (en) 2022-11-04

Family

ID=83830792

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210980882.7A Pending CN115289045A (en) 2022-08-16 2022-08-16 Roof fan and control method thereof

Country Status (1)

Country Link
CN (1) CN115289045A (en)

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