CN104596053B - CIT has the vent cabinet small controller of variable air rate regulatory function - Google Patents
CIT has the vent cabinet small controller of variable air rate regulatory function Download PDFInfo
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- CN104596053B CN104596053B CN201410734122.3A CN201410734122A CN104596053B CN 104596053 B CN104596053 B CN 104596053B CN 201410734122 A CN201410734122 A CN 201410734122A CN 104596053 B CN104596053 B CN 104596053B
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention, which proposes a kind of CIT, has the vent cabinet small controller of variable air rate regulatory function, including face air velocity transducer, pressure sensor, the first ADC analog to digital conversion circuits, the 2nd ADC analog to digital conversion circuits, DAC D/A converting circuits, ultrasonic wave module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, execution circuit and power-switching circuit；First single-chip microcomputer external matrix on-off circuit, execution circuit, execution circuit include the first motor of control door aperture, control the second motor, lighting apparatus and the warning device of valve area；Face air velocity transducer and pressure sensor connect second singlechip by the first ADC analog to digital conversion circuits and the 2nd ADC analog to digital conversion circuits respectively, and ultrasonic wave module connection second singlechip, host computer connects second singlechip by DAC D/A converting circuits；First single-chip microcomputer and second singlechip communication connection.The achievable vent cabinet air quantity of the present invention is automatically adjusted, and integrated level is high, is conducive to reducing vent cabinet volume.
Description
Technical field
There is the vent cabinet of variable air rate regulatory function the present invention relates to Boiler pressure control technical field, more particularly to a kind of CIT
Small controller.
Background technology
Traditional laboratory ventilation cabinet equipment mainly completes the function such as to be controlled to illumination, air draft, additional supply switch,
These functions are operated with manual switches to realize, its product integrated level is low, and power circuit is in disorder, and maintenance is complicated, product structure
Simply, it is impossible to upgrade, the scope of application is small, can not meet needs.
The content of the invention
The technical problem existed based on background technology, the present invention, which proposes a kind of CIT, has the logical of variable air rate regulatory function
Wind cabinet small controller, can be achieved vent cabinet air quantity and automatically adjusts, integrated level is high, be conducive to reducing vent cabinet volume.
A kind of CIT proposed by the present invention has the vent cabinet small controller of variable air rate regulatory function, including face wind speed is passed
Sensor, pressure sensor, the first ADC analog to digital conversion circuits, the 2nd ADC analog to digital conversion circuits, DAC D/A converting circuits, ultrasound
Ripple module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, execution circuit and power-switching circuit；
First single-chip microcomputer external matrix on-off circuit, execution circuit, first motor of the execution circuit including control door aperture,
Control the second motor, lighting apparatus and the warning device of valve area；
Face air velocity transducer and pressure sensor pass through the first ADC analog to digital conversion circuits and the 2nd ADC analog-to-digital conversions respectively
Circuit connects second singlechip, and ultrasonic wave module connection second singlechip, host computer connects second by DAC D/A converting circuits
Single-chip microcomputer；
First single-chip microcomputer and second singlechip communication connection；
The power-switching circuit that civil power is converted into direct current connects the first ADC analog to digital conversion circuits, the 2nd ADC moulds respectively
Number change-over circuit, DAC D/A converting circuits, ultrasonic wave module, the first single-chip microcomputer and second singlechip are powered.
Preferably, the first single-chip microcomputer and second singlechip use STC89C52 chips.
Preferably, first single-chip microcomputer P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin external 4 × 4
Switch matrix circuit；First single-chip microcomputer P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6, P0.7 pin connects respectively
One relay, the second relay, the 3rd relay, the 4th relay, the 5th relay, the 6th relay, the 7th relay and
8th relay；First motor connects the normally opened contact and the second relay normally open contact of the first relay, lighting apparatus respectively
Connect the normally opened contact of the 3rd relay, the second motor connect respectively the 4th relay normally opened contact and the 5th relay it is normal
Contact is opened, warning device connects the normally opened contact of the 6th relay.
Preferably, the first relay, the second relay, the 3rd relay, the 4th relay, the 5th relay, the 6th after
Electrical equipment, the 7th relay and the 8th relay connect direct current, the first motor, the second motor, photograph by a pull-up resistor respectively
Bright equipment and warning device are by mains-supplied.
Preferably, the first ADC analog to digital conversion circuits and the 2nd ADC analog to digital conversion circuits are respectively by the first ADC0804 chips
Realized with the 2nd ADC0804 chips external circuitses, wherein, ADC0804 chip VREF/2 pins connect direct current by first resistor
And be grounded by second resistance, CLK IN pins connect CLK by the 11st capacity earth, CLK R pins by 3rd resistor
IN pins, AGND pins ground connection, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7 pin connects second singlechip respectively
P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin；Face air velocity transducer is connected to the first ADC chips
Between VIN+ pins and VIN- pins, pressure sensor be connected to the 2nd ADC0804 chips VIN+ pins and VIN- pins it
Between；The P2.1 pins and P2.2 pins of second singlechip connect the CS of the first ADC0804 chips and the 2nd ADC0804 chips respectively
Pin.
Preferably, ultrasonic wave module uses HC-SR04 chips, and its ECHO pin connects the INT0 pins of second singlechip,
The TRTG pins of ultrasonic wave module connect the P2.0 pins of second singlechip.
Preferably, DAC D/A converting circuits are realized by max515 chips, and its REFIN pin connects direct current by the 4th resistance
Electricity and by the 5th resistance eutral grounding, its SCLK pin, CS pins and DIN pins connect respectively second singlechip P2.3 pins,
P2.4 pins and P2.5 pins, its OUT pin connection host computer.
Preferably, power-switching circuit mainly include transformer, the first diode, the second diode, the 3rd diode and
4th diode, the first Voltage stabilizing module, the second Voltage stabilizing module and the 3rd Voltage stabilizing module；First diode, the second diode, the 3rd
Diode and the 4th diode are sequentially connected in series into loop, and two output ends of transformer secondary coil are connected to the one or two pole
Between pipe and the second diode between the 3rd diode and the 4th diode, transformer has earth terminal and its primary coil connects
Enter 220V alternating currents；The input of first Voltage stabilizing module is connected between the second diode and the 4th diode, and passed through respectively
First electric capacity and the 3rd capacity earth, its output end connect the first DC output end by the 6th resistance, and respectively by the
Five electric capacity and the 7th capacity earth；The input of second Voltage stabilizing module is connected between the first diode and the 3rd diode, and
Respectively by the second electric capacity and the 4th capacity earth, its output end connects the second DC output end by the 7th resistance, and divides
Do not pass through the 6th electric capacity and the 8th capacity earth；3rd Voltage stabilizing module input connects the first Voltage stabilizing module output end, and passes through
9th capacity earth, its output end passes through the tenth capacity earth as the 3rd DC output end.
Preferably, the model 7815 of the first Voltage stabilizing module and the second Voltage stabilizing module, the model of the 3rd Voltage stabilizing module
7805。
Preferably, alarm module is buzzer.
The invention provides automatically controlling and controlling two kinds of air quantity adjusting methods manually, flexibility ratio is high, applied widely；And
Realized using integrated chips such as single-chip microcomputer, ADC chips, improve circuit level, reduce volume, be easily installed and use, fitted
With in extensive range.In the present invention, realize that air quantity is self-regulated by way of monitoring, calculating automatically in real time, automaticity is high, essence
Degree is high, is conducive to lifting operating efficiency, and have control two kinds of regulative modes of door aperture and valve area, and aperture and wind on the door
Valve opening is monitored in real time, is conducive to avoiding the situation of door and air-valve maximal work, it is to avoid the limit is damaged.
Brief description of the drawings
Fig. 1 is the vent cabinet small controller Power convert that a kind of CIT proposed by the present invention has variable air rate regulatory function
Circuit theory schematic diagram；
Fig. 2 is the vent cabinet small controller local circuit that a kind of CIT proposed by the present invention has variable air rate regulatory function
Principle schematic；
Fig. 3 is the vent cabinet small controller execution circuit that a kind of CIT proposed by the present invention has variable air rate regulatory function
Schematic diagram；
Fig. 4 is the vent cabinet small controller local circuit that a kind of CIT proposed by the present invention has variable air rate regulatory function
Principle schematic.
Embodiment
A kind of CIT proposed by the present invention has the vent cabinet small controller of variable air rate regulatory function, including face wind speed is passed
Sensor, pressure sensor, the first ADC analog to digital conversion circuits, the 2nd ADC analog to digital conversion circuits, DAC D/A converting circuits, ultrasound
Ripple module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, execution circuit and power-switching circuit.
First single-chip microcomputer external matrix on-off circuit, execution circuit, execution circuit include the first motor of control door aperture
M1, the second motor M2, lighting apparatus and the warning device for controlling valve area.
Face air velocity transducer is used to detect wind speed, and pressure sensor is used to detect airduct internal pressure.Face air velocity transducer and pressure
Force snesor connects second singlechip by the first ADC analog to digital conversion circuits and the 2nd ADC analog to digital conversion circuits respectively.First
The face wind velocity signal and pressure signal that receive are converted to numeral by ADC analog to digital conversion circuits and the 2nd ADC modulus circuits respectively
Second singlechip is sent to after signal.
Ultrasonic wave module connects second singlechip, and second singlechip is sent after instruction to ultrasonic wave module, ultrasonic wave module
Launch ultrasonic wave, ultrasonic wave is returned after meeting with obstruction, and ultrasonic wave module is to second singlechip send feedback information, second singlechip
Calculate the distance with door to judge the aperture of door according to ultrasonic echo time.
Host computer connects second singlechip by DAC D/A converting circuits, and DAC D/A converting circuits are by second singlechip meter
The face wind speed biography value and the opening value of door calculated, which is converted to, to be sent to host computer and is shown after analog signal, host computer can be used
PLC (Programmable Logic Controller, programmable logic controller (PLC)) chip.
First single-chip microcomputer and second singlechip communicate to connect and use STC89C52 chips, STC89C52 chips X1, X2
Pin connects minimum system, its reset pin connection reset circuit.
The power-switching circuit that civil power is converted into direct current connects the first ADC analog to digital conversion circuits, the 2nd ADC moulds respectively
Number change-over circuit, DAC D/A converting circuits, ultrasonic wave module, the first single-chip microcomputer and second singlechip are powered.
As shown in figure 1, power-switching circuit mainly includes transformer T1, the first diode D1, the second diode D2, the 3rd
Diode D3 and the 4th diode D4, the first Voltage stabilizing module U1, the second Voltage stabilizing module U2 and the 3rd Voltage stabilizing module U3.
First diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 are sequentially connected in series into loop.Become
Two output ends of depressor T1 secondary coils are connected between the first diode D1 and the second diode D2 and the three or two pole
Between pipe D3 and the 4th diode D4, transformer T1 has earth terminal and its primary coil access 220V alternating currents.
First Voltage stabilizing module U1 input is connected between the second diode D2 and the 4th diode D4, and is passed through respectively
First electric capacity C1 and the 3rd electric capacity C3 ground connection, its output end is distinguished by the 6th resistance R6 the first DC output ends of connection
It is grounded by the 5th electric capacity C5 and the 7th electric capacity C7.
Second Voltage stabilizing module U2 input is connected between the first diode D1 and the 3rd diode D3, and is passed through respectively
Second electric capacity C2 and the 4th electric capacity C4 ground connection, its output end is distinguished by the 7th resistance R7 the second DC output ends of connection
It is grounded by the 6th electric capacity C6 and the 8th electric capacity C8.
3rd Voltage stabilizing module U3 inputs connect the first Voltage stabilizing module U1 output ends, and are grounded by the 9th electric capacity C9, its
Output end is grounded as the 3rd DC output end, and by the tenth electric capacity C10.
First diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 model 1N404.The
One Voltage stabilizing module U1 and the second Voltage stabilizing module U2 model 7815, the 3rd Voltage stabilizing module U3 model 7805.
First electric capacity C1 and the second electric capacity C2 specification are 4700uF/35V；3rd electric capacity C3, the 4th electric capacity C4, the 7th electricity
The specification for holding C7 and the 8th electric capacity C8 is 0.1uF；5th electric capacity C5 and the 6th electric capacity C6 specification is 220uF/25V；9th electricity
The specification for holding C9 and the tenth electric capacity C10 is 220uF.6th resistance R6 and the 7th resistance R7 resistance is 10K Ω.
Exportable+15V the direct currents of the DC output end of power-switching circuit first, the 3rd DC output end is exportable
+ 5V direct currents, the first ADC analog to digital conversion circuits, the 2nd ADC analog to digital conversion circuits, DAC D/A converting circuits, ultrasonic wave module,
The direct current incoming end of first single-chip microcomputer and second singlechip can select to be connected to the first DC output end or as needed
Three DC output ends.Exportable -15V the direct currents of the DC output end of power-switching circuit second are as standby.
As shown in Figure 2 and Figure 3, outside first single-chip microcomputer P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin
4 × 4 switch matrix circuits are connect, for manual input signals.First single-chip microcomputer P0.0, P0.1, P0.2, P0.3, P0.4, P0.5,
P0.6, P0.7 pin connect the first relay k1, the second relay k2, the 3rd relay k3, the 4th relay k4, the 5th respectively
Relay k5, the 6th relay k6, the 7th relay k7 and the 8th relay k8.
First motor M1 connects the first relay k1 normally opened contact K1 and the second relay k2 normally opened contact K2 respectively, with
The switch of door is controlled according to first monolithic P0.0, P0.1 pin output signal.Lighting apparatus connects the normally opened of the 3rd relay k3
Contact K3, to control the switch of lighting apparatus according to the first monolithic P0.2 pins output signal.Second motor M2 connects respectively
Four relay k4 normally opened contact K4 and the 5th relay k5 normally opened contact K5, with according to first monolithic P0.3, P0.4 pin
Output signal controls the switch of air-valve, carries out air quantity regulation.Warning device connects the 6th relay k6 normally opened contact K6, with root
Aroused attention according to the control warning device alarm of the first monolithic P0.5 pins output signal.First monolithic P0.6, P0.7 pin conduct
Spare control signal output end.
It is worth noting that, the first relay k1, the second relay k2, the 3rd relay k3, the 4th relay k4, the 5th
Relay k5, the 6th relay k6, the 7th relay k7 and the 8th relay k8 connect direct current by a pull-up resistor respectively,
First motor M1, the second motor M2, lighting apparatus and warning device are directly powered by civil power.
As shown in figure 4, the first ADC analog to digital conversion circuits and the 2nd ADC analog to digital conversion circuits are respectively by the first ADC0804 cores
Piece and the 2nd ADC0804 chips external circuitses are realized.The external circuitses of first ADC0804 chips and the 2nd ADC0804 chips are real
It is now that VREF/2 pins connect direct current by first resistor R1 and are grounded by second resistance R2, and CLK IN pins pass through the tenth
One electric capacity C11 is grounded, and CLK R pins are by 3rd resistor R3 connection CLK IN pins, and AGND pins are grounded, DB0, DB1, DB2,
DB3, DB4, DB5, DB6, DB7 pin connect respectively the P1.0 of second singlechip, P1.1, P1.2, P1.3, P1.4, P1.5,
P1.6, P1.7 pin.The P2.1 pins and P2.2 pins of second singlechip connect the first ADC0804 chips and second respectively
The CS pins of ADC0804 chips have carried out piece choosing.
Face air velocity transducer is connected between the VIN+ pins of the first ADC chips and VIN- pins, pressure sensor connection
Between the VIN+ pins and VIN- pins of the 2nd ADC0804 chips.
Ultrasonic wave module uses HC-SR04 chips, and its ECHO pin connects the INT0 pins of second singlechip, ultrasonic wave mould
The TRTG pins of block connect the P2.0 pins of second singlechip, to carry out two-way communication with second singlechip.
DAC D/A converting circuits are realized that its REFIN pin connects direct current by the 4th resistance R4 and led to by max515 chips
The 5th resistance R5 ground connection is crossed, its SCLK pin, CS pins and DIN pins connect P2.3 pins, the P2.4 of second singlechip respectively
Pin and P2.5 pins, its OUT pin connection host computer.
When the CIT has the vent cabinet small controller work of variable air rate regulatory function, second singlechip is super by control
Sound wave module work calculates the aperture of door, and by face air velocity transducer and pressure monitor sensor wind speed and airduct internal pressure,
And with the first single chip communication, the first motor M1 and the second motor M2 work in the first single-chip microcomputer control execution circuit are to adjust
The aperture of valve area and door, to realize the regulation of air quantity；When the aperture of door is reached the limit values, the first single-chip microcomputer control second
Motor M2, which works, realizes the regulation of air quantity with adjusting air valve aperture, when pressure sensor monitoring to airduct internal pressure reach the limit values
When, the first single-chip microcomputer controls the first motor M1 work to adjust the regulation that the aperture of door realizes air quantity；Alternatively, it is also possible to pass through square
The manual input signals control execution circuit work of battle array on-off circuit.First single-chip microcomputer always according to second singlechip signal of communication or
The signal being manually entered by switch matrix circuit controls photo apparatus and warning device to work, such as when wind speed is reached the limit values
When, warning device alarms to arouse attention.Host computer is shown to arouse attention to the aperture of wind speed and door.
Present embodiments provide for automatically controlling and controlling two kinds of air quantity adjusting methods manually, flexibility ratio is high, the scope of application
Extensively.Present embodiment is realized using integrated chips such as single-chip microcomputer, ADC chips, is improved circuit level, is reduced volume, just
It is applied widely in installing and using.Present embodiment realizes that air quantity is self-regulated by way of monitoring, calculating automatically in real time,
Automaticity is high, and precision is high, is conducive to lifting operating efficiency, and with two kinds of regulation sides of control door aperture and valve area
Formula, and it is monitored in real time, be conducive to avoiding the situation of door and air-valve maximal work, it is to avoid the limit is damaged.
In present embodiment, lighting apparatus uses electric light, and warning device uses buzzer.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (10)
1. a kind of CIT has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that including：
Face air velocity transducer, pressure sensor, the first ADC analog to digital conversion circuits, the 2nd ADC analog to digital conversion circuits, DAC digital-to-analogues turn
Circuit, ultrasonic wave module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, execution circuit and power supply is changed to turn
Change circuit；
First single-chip microcomputer external matrix on-off circuit, execution circuit, first motor (M1) of the execution circuit including control door aperture,
Control the second motor (M2), lighting apparatus and the warning device of valve area；
Face air velocity transducer and pressure sensor pass through the first ADC analog to digital conversion circuits and the 2nd ADC analog to digital conversion circuits respectively
Second singlechip is connected, ultrasonic wave module connection second singlechip, host computer connects the second monolithic by DAC D/A converting circuits
Machine；
First single-chip microcomputer and second singlechip communication connection；
The power-switching circuit that civil power is converted into direct current connects the first ADC analog to digital conversion circuits, the 2nd ADC moduluses and turned respectively
Circuit, DAC D/A converting circuits, ultrasonic wave module, the first single-chip microcomputer and second singlechip is changed to be powered.
2. CIT as claimed in claim 1 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that the
One single-chip microcomputer and second singlechip use STC89C52 chips.
3. CIT as claimed in claim 2 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that the
One external 4 × 4 switch matrix circuit of single-chip microcomputer P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin；First
Single-chip microcomputer P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6, P0.7 pin connect the first relay (k1), second respectively
Relay (k2), the 3rd relay (k3), the 4th relay (k4), the 5th relay (k5), the 6th relay (k6), the 7th after
Electrical equipment (k7) and the 8th relay (k8)；First motor (M1) connects the first relay (k1) normally opened contact (K1) and respectively
Two relays (k2) normally opened contact (K2), lighting apparatus connects the normally opened contact (K3) of the 3rd relay (k3), the second motor
(M2) normally opened contact (K4) of the 4th relay (k4) and the normally opened contact (K5) of the 5th relay (k5) are connected respectively, and alarm is set
The normally opened contact (K6) of the 6th relay (k6) of standby connection.
4. CIT as claimed in claim 3 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that the
One relay (k1), the second relay (k2), the 3rd relay (k3), the 4th relay (k4), the 5th relay (k5), the 6th
Relay (k6), the 7th relay (k7) and the 8th relay (k8) connect direct current, the first electricity by a pull-up resistor respectively
Machine (M1), the second motor (M2), lighting apparatus and warning device are by mains-supplied.
5. CIT as claimed in claim 2 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that the
One ADC analog to digital conversion circuits and the 2nd ADC analog to digital conversion circuits are respectively by the first ADC0804 chips and the 2nd ADC0804 chips
External circuitses realization, wherein, ADC0804 chip VREF/2 pins connect direct current and by second resistance by first resistor (R1)
(R2) it is grounded, CLK IN pins are grounded by the 11st electric capacity (C11), CLK R pins connect CLK by 3rd resistor (R3)
IN pins, AGND pins ground connection, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7 pin connects second singlechip respectively
P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin；Face air velocity transducer is connected to the first ADC chips
Between VIN+ pins and VIN- pins, pressure sensor be connected to the 2nd ADC0804 chips VIN+ pins and VIN- pins it
Between；The P2.1 pins and P2.2 pins of second singlechip connect the CS of the first ADC0804 chips and the 2nd ADC0804 chips respectively
Pin.
6. CIT as claimed in claim 5 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that super
Sound wave module uses HC-SR04 chips, and its ECHO pin connects the INT0 pins of second singlechip, and the TRTG of ultrasonic wave module draws
Pin connects the P2.0 pins of second singlechip.
7. CIT as claimed in claim 6 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that DAC
D/A converting circuit is realized that its REFIN pin connects direct current and by the 5th electricity by the 4th resistance (R4) by max515 chips
Hinder (R5) ground connection, its SCLK pin, CS pins and DIN pins connect respectively the P2.3 pins of second singlechip, P2.4 pins and
P2.5 pins, its OUT pin connection host computer.
8. CIT as claimed in claim 1 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that electricity
Power-switching circuit mainly includes transformer (T1), the first diode (D1), the second diode (D2), the 3rd diode (D3) and the
Four diodes (D4), the first Voltage stabilizing module (U1), the second Voltage stabilizing module (U2) and the 3rd Voltage stabilizing module (U3)；First diode
(D1), the second diode (D2), the 3rd diode (D3) and the 4th diode (D4) are sequentially connected in series into loop, and transformer (T1) is secondary
Two output ends of level coil are connected between the first diode (D1) and the second diode (D2) and the 3rd diode
(D3) between the 4th diode (D4), transformer (T1) has earth terminal and its primary coil access 220V alternating currents；First
The input of Voltage stabilizing module (U1) is connected between the second diode (D2) and the 4th diode (D4), and passes through the first electricity respectively
Hold (C1) and the 3rd electric capacity (C3) ground connection, its output end connects the first DC output end by the 6th resistance (R6), and respectively
It is grounded by the 5th electric capacity (C5) and the 7th electric capacity (C7)；The input of second Voltage stabilizing module (U2) is connected to the first diode
(D1) between the 3rd diode (D3), and it is grounded respectively by the second electric capacity (C2) and the 4th electric capacity (C4), its output end is led to
Cross the 7th resistance (R7) and connect the second DC output end, and be grounded respectively by the 6th electric capacity (C6) and the 8th electric capacity (C8)；
3rd Voltage stabilizing module (U3) input connects the first Voltage stabilizing module (U1) output end, and is grounded by the 9th electric capacity (C9), and its is defeated
Go out end as the 3rd DC output end, and be grounded by the tenth electric capacity (C10).
9. CIT as claimed in claim 1 has the vent cabinet small controller of variable air rate regulatory function, it is characterised in that the
The model 7815 of one Voltage stabilizing module (U1) and the second Voltage stabilizing module (U2), the model 7805 of the 3rd Voltage stabilizing module (U3).
10. the CIT as described in any one of claim 1 to 9 has the vent cabinet small controller of variable air rate regulatory function, it is special
Levy and be, alarm module is buzzer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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