CN111006290A - Automatic control circuit of kitchen exhaust fan - Google Patents
Automatic control circuit of kitchen exhaust fan Download PDFInfo
- Publication number
- CN111006290A CN111006290A CN202010029100.2A CN202010029100A CN111006290A CN 111006290 A CN111006290 A CN 111006290A CN 202010029100 A CN202010029100 A CN 202010029100A CN 111006290 A CN111006290 A CN 111006290A
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- terminal
- power supply
- control unit
- output
- circuit
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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
- F24C15/2021—Arrangement or mounting of control or safety systems
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
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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
本发明提供一种简单实用的厨房排烟风机自动控制电路，包括直流稳压电源单元、油烟检测及浓度鉴别单元、油烟浓度低位输出控制单元、油烟浓度低位延迟输出控制单元、油烟浓度高位输出控制单元、风阀驱动单元、双速风机控制单元；可以根据厨房后堂油烟浓度大/小自动开启风机大/小档或关闭；同时，在开启风机时，实现先开启风阀再开启风机，在关闭风机时，延迟关闭风阀，从而实现自动控制厨房排烟风机功能。
The invention provides a simple and practical automatic control circuit for a kitchen fume exhaust fan, which includes a DC voltage-stabilized power supply unit, a lampblack detection and concentration identification unit, a lampblack concentration low output control unit, a lampblack concentration low delay output control unit, and a lampblack concentration high output control unit. unit, air valve drive unit, and two-speed fan control unit; the fan can be automatically turned on or off according to the concentration of oil fume in the back hall of the kitchen; When the fan is turned off, the closing of the air valve is delayed, so as to realize the function of automatic control of the kitchen exhaust fan.
Description
Technical Field
The invention relates to the field of commercial kitchen equipment, in particular to an automatic control circuit of a kitchen smoke exhaust fan.
Background
The commercial kitchen oil fume purification needs to discharge oil fume-containing air in a kitchen back hall into a purifier for treatment through a fume hood and exhaust equipment arranged in the fume hood; the conventional method is as follows: the fan is provided with a large gear and a small gear, and a chef turns on different gears or turns off the fan according to the size of the oil smoke concentration; when the fan is started, the air valve is opened firstly and then the fan is started, and when the fan is closed, the air valve is delayed to be closed; the aforementioned manual operation is very inconvenient.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a simple and practical automatic control circuit of a commercial kitchen smoke exhaust fan, which has the advantages of higher automatic control degree, low price, stable performance and simple maintenance.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the automatic control circuit of the kitchen smoke exhaust fan comprises a direct current stabilized voltage power supply unit, an oil smoke detection and concentration identification unit, an oil smoke concentration low-level output control unit, an oil smoke concentration low-level delay output control unit, an oil smoke concentration high-level output control unit, an air valve driving unit and a double-speed fan control unit;
the direct current stabilized voltage supply unit comprises a circuit B, the input end of the circuit B is connected with a 220V alternating current power supply end, and the output end of the circuit B is direct current;
the oil smoke detection and concentration discrimination unit comprises an oil smoke sensor, potentiometers R1, R2, resistors R3, R4, integrated operational amplifiers N1 and N2, wherein two ends of R1 and R2 are respectively connected with two ends of a B circuit direct current power supply, middle pins of R1 and R2 are respectively connected with negative electrodes of N1 and N2 input ends, a power supply end of the oil smoke sensor is connected with the direct current power supply, an output end of the oil smoke sensor is connected with one ends of R3 and R4, the other ends of R3 and R4 are respectively connected with positive electrodes of N1 and N2 input ends, and power supply ends of N1 and N2 are connected with direct current;
the oil smoke concentration low-level output control unit comprises a resistor R5, a triode Q1 and a relay J1, one end of the R5 is connected with the output end of the N2, the other end of the R5 is connected with the base of the Q1, the collector of the Q1 is connected with the anode of the output end of the B circuit, the emitter of the Q1 is connected with one end of the J1, and the other end of the J1 is connected with the output direct current 0V end of;
the oil smoke concentration low-level delay output control unit comprises a resistor R6, a capacitor C1, a diode D1, a triode Q2 and a relay J2, wherein one end of R6 is connected with a Q1 emitter, the other end of R6 is connected with positive terminals of C1 and D1, the negative terminal of C1 is connected with a direct-current 0V terminal, the negative terminal of D1 is connected with a Q2 base, the collector of Q2 is connected with the positive terminal of a direct-current power supply, the emitter of Q2 is connected with one end of J2, and the other end of J2 is connected with a direct-current power;
the oil smoke concentration high-level output control unit comprises an R7, a triode Q3 and a relay J4, one end of the R7 is connected with the output end of the N1, the other end of the R7 is connected with the base of the Q3, the collector of the Q3 is connected with the output direct-current positive end of the B circuit, the emitter of the Q3 is connected with one end of the J4, and the other end of the J4 is connected with the 0V end of the direct;
the air valve driving unit comprises diodes D2, D3 and a relay J3, wherein the anode of D2 is connected with the emitter of Q1, the anode of D3 is connected with the emitter of Q2, the cathodes of D2 and D3 are connected with one end of J3, and the other end of J3 is connected with a direct-current 0V end.
The double-speed fan control unit comprises alternating current contactors KA, KB and KC, switches J1-1, J1-2, J1-3, J2-1, J2-2, J4-1 and J4-2 which are connected, control ends of the KA, the KB and the KC respectively control stop, low-speed and high-speed switches of the double-speed motor controller, one end of a J1-1 is connected with a live wire and the other end of the KA is connected with a zero line, the other end of the KA is connected with a neutral wire, the other end of a J1-2 is connected with a live wire and the other end of a J2-1, the other end of the J2-1 is connected with one end of the KB, the other end of the KB is connected with one end of the J4-1 and the other end of the J4-1, one end of a J1-3 is connected with a live wire and the other end of the KC 48-2, the other end of the KC is connected.
The air valve control circuit controls a switch J3-1, one end of an air valve closing drive coil is connected with a power supply N, the other end of the air valve closing drive coil is connected with a normally closed end J3-1, and the other end (movable end) of the normally closed end J3-1 is connected with a power supply L end; one end of the air valve opening driving coil is connected with a power supply N, and the other end is connected with a normally open end J3-1.
The invention provides an automatic control circuit of a kitchen smoke exhaust fan, which has the advantages of higher automatic control degree, simple circuit structure, low price, stable performance and convenient maintenance.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic diagram of the circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
A DC voltage-stabilized power supply unit: the unit circuit is a common circuit, and the circuit composition and the working principle are not described in detail.
Oil smoke detection and concentration identification unit: the oil smoke sensor collects oil smoke concentration and outputs an analog voltage signal to enter the input ends of the integrated operational amplifier N1 and N2 through resistors R3 and R4, the high-level voltage output by the middle end of the R1 is consistent with the analog voltage corresponding to the higher oil smoke concentration, the low-level voltage output by the middle end of the R2 is consistent with the analog voltage corresponding to the lower oil smoke concentration through adjusting potentiometers R1 and R2, when the analog voltage input by the integrated operational amplifier is higher than the voltage input by the potentiometers, the high level is output, otherwise, the low level is output.
Oil smoke concentration low level output control unit: the signal output by the N2 controls the Q1 to be switched off/on through the base current limiting resistor R5 and enables the J1 to be powered off/on, and the J1 controls the switches J1-1, J1-2 and J1-3 to be switched on or off.
Oil smoke concentration low level postpones output control unit: when Q1 is conducted, C1 is charged through R6, D1 is used for increasing threshold voltage and prolonging delay time, and when the positive terminal voltage of C1 exceeds D1 and Q2 dead zone voltage, Q2 is conducted and drives J2.
Oil smoke concentration high-order output control unit: the signal output by N1 controls Q3 to be switched off/on through a base current limiting resistor R7 and enables J4 to be switched off/on, and J4 controls switches J4-1 and J4-2.
The blast gate drive unit: when only one of D2 and D3 is turned on, J3 is powered on, and when both D2 and D3 are turned off, J3 is powered off.
The operation process is as follows:
before starting, the J1-1 is normally closed, the KA is electrified, and the fan stops working; j3-1 is normally closed, the air valve closing coil is electrified, and the air valve is closed.
When the concentration of the oil smoke reaches a set low value, the N2 outputs a high level, the Q1 is conducted, the D2 is conducted, the J3 is electrified, the normally open end of the J3-1 is closed, and the air valve is opened; meanwhile, J1 is electrified, J1-1 is disconnected, J1-2 and J1-3 are closed; after Q1 is conducted, R6 charges C1, and after a period of delay, Q2 is conducted, J2 is powered on, KB is powered on, a low-speed switch of the fan is effective, and the fan runs at a low speed; this achieves that: the air valve is opened firstly, and then the low-speed gear of the fan is started after delaying.
When the concentration of the oil smoke reaches a set high value, the N1 outputs a high level, the Q3 is switched on, the J4 is powered on, the J4-1 is switched off, the J4-2 is switched on, the KC is powered on, the KB is powered off, the high gear is effectively turned off by the low gear of the fan, and the fan runs at a high speed; this achieves that: and automatically starting the high-low gear of the fan according to the concentration of the oil smoke.
When the concentration of the oil smoke is reduced to be lower than a set high-level value, the N1 outputs a low level, the Q3 is cut off, the J4 loses power, the J4-1 is closed, the J4-2 is disconnected, the KC is powered off, the KB is powered on, and the fan returns to the low-speed operation; when the oil smoke concentration continuously drops below a set low value, the N2 outputs low level, Q1 is switched on, J1 is electrified, J1-1 is switched on, J1-2 and J1-3 are switched off, and the fan stops running; at this time, due to the action of R6 and C1, one end of time Q2 needs to be delayed to be switched from on to off, Q2 is cut off, D3 is also cut off, J3 loses power, a normally closed end J3-1 is closed, and an air valve is closed; this achieves that: the fan is closed firstly, and the air valve is closed after delaying.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010029100.2A CN111006290B (en) | 2020-01-12 | 2020-01-12 | Automatic control circuit of kitchen exhaust fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010029100.2A CN111006290B (en) | 2020-01-12 | 2020-01-12 | Automatic control circuit of kitchen exhaust fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111006290A true CN111006290A (en) | 2020-04-14 |
| CN111006290B CN111006290B (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010029100.2A Active CN111006290B (en) | 2020-01-12 | 2020-01-12 | Automatic control circuit of kitchen exhaust fan |
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| CN (1) | CN111006290B (en) |
Citations (12)
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| JPH05172345A (en) * | 1991-12-25 | 1993-07-09 | Toshiba Corp | Heating cooker |
| CN2149572Y (en) * | 1992-10-29 | 1993-12-15 | 江照政 | Gas self-control device for range hood |
| CN2419561Y (en) * | 2000-05-11 | 2001-02-14 | 李根长 | Intellectual controller for smoke eliminating and dust collecting for industrial funnace |
| CN2588243Y (en) * | 2002-11-15 | 2003-11-26 | 区子宏 | Environment protction type central fume exhauster system |
| KR20110121908A (en) * | 2010-05-03 | 2011-11-09 | 박명선 | Controller for Chinese stove |
| US20130305748A1 (en) * | 2012-05-18 | 2013-11-21 | Honeywell International Inc. | Icephobic coating on the condenser cold side |
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2020
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| CN2149572Y (en) * | 1992-10-29 | 1993-12-15 | 江照政 | Gas self-control device for range hood |
| CN2419561Y (en) * | 2000-05-11 | 2001-02-14 | 李根长 | Intellectual controller for smoke eliminating and dust collecting for industrial funnace |
| CN2588243Y (en) * | 2002-11-15 | 2003-11-26 | 区子宏 | Environment protction type central fume exhauster system |
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| US20130305748A1 (en) * | 2012-05-18 | 2013-11-21 | Honeywell International Inc. | Icephobic coating on the condenser cold side |
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| CN108443920A (en) * | 2018-05-31 | 2018-08-24 | 安徽铂悦厨业有限公司 | A kind of commercial energy-saving gas stove control device |
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| CN110173726A (en) * | 2019-05-30 | 2019-08-27 | 杭州老板电器股份有限公司 | Air quantity controller, method and the central purge system of central purge system |
| CN110186092A (en) * | 2019-05-30 | 2019-08-30 | 杭州老板电器股份有限公司 | Air quantity controller, method and the central exhaust system of central exhaust system |
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| Publication number | Publication date |
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| CN111006290B (en) | 2021-08-24 |
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Effective date of registration: 20250707 Address after: 310000 Zhejiang Province Hangzhou City Yuhang District Tangqi Town Mojiabridge Village Mojia Dou outside 66.NO Building 1 Patentee after: Hangzhou Qijiang HVAC Equipment Co.,Ltd. Country or region after: China Address before: Gao City Economic and Technological Development Zone, Anhui province Lu'an City Road 237000 Patentee before: Li Chuancong Country or region before: China |
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