CN207946177U - The vapor (steam) temperature detection circuit of steam-type smoke purifier - Google Patents

Abstract

The utility model is related to a kind of vapor (steam) temperature detection circuits of steam-type smoke purifier；The detection circuit contains thermistor, microcontroller, partial pressure potential device, trigger timer, three triodes and indicator light, thermistor is mounted on the jet chimney of smoke purifier or at the venthole of steam, indicator light is mounted on the panel of smoke purifier, tie point after thermistor and partial pressure potential device are cascaded is connect with the thresholding end of triggering timer and triggering end, the output end of triggering timer is connect with the base stage of the first triode, the collector of first triode is connect with the base stage of the second triode, the collector of second triode and the temperature signal input of microcontroller connect, the indicator light control signal output of microcontroller is connect by third transistor with indicator light；The utility model can in real time, accurately detect the temperature of smoke purifier steam, and testing result is shown call user's attention, and function is strong, production cost is low.

Description

The vapor (steam) temperature detection circuit of steam-type smoke purifier

（One）, technical field：

The utility model is related to a kind of vapor (steam) temperature detection circuit, more particularly to a kind of steam of steam-type smoke purifier Temperature sensing circuit.

（Two）, background technology：

Currently, with the continuous development of China's economy, living standards of the people are continuously improved, the fume pollution from kitchen It is increasingly severe, usually pass through oil smoke containing a large amount of volatile particles to prevent it from generating injury to human body in these oil smoke Machine discharges it outdoor.However, these oil smoke enter in air and pollute the environment, and to solve this problem, some kitchen ventilators In increase cooking fume purification handling function, such as：Application No. is disclose " steam oil smoke in the patent application of 201710968828.X Separate type integration kitchen pollution air treatment system ", the system shield separator combination steam to oil using umbrella rib type oil smoke Cigarette carries out the oil smoke separation of early period, and what is backward arranged is essentially all cigarette, then passes through quartz burner using strainer filtering Irradiation and electrostatic oil and smoke cleaner carry out cigarette multiple processing repeatedly, finally carry out air purification processing using activated carbon, The flue gas of discharge is essentially colorless, tasteless, harmless.The steam used in the cooking fume purification handling system is for being carried out to oil smoke Dilution atomization, temperature is a critically important factor, and vapor (steam) temperature is too low, and clean-up effect is not achieved, and in the system The temperature of steam is not detected, when steam engine failure cannot generate high-temperature steam, the effect meeting of fume purifying It is greatly affected, makes the gas that cooking fume purification handling system is discharged that discharge standard be not achieved, pollute atmospheric environment.

（Three）, utility model content：

The technical problems to be solved in the utility model is：A kind of vapor (steam) temperature detection electricity of steam-type smoke purifier is provided Road, which can in real time, accurately detect the temperature of smoke purifier steam, and testing result is shown by indicator light Out call user's attention, function is strong, production cost is low.

The technical solution of the utility model：

A kind of vapor (steam) temperature detection circuit of steam-type smoke purifier, contains thermistor, microcontroller, partial pressure potential Device, triggering timer, the first triode, the second triode, third transistor and indicator light, thermistor are mounted on steam-type oil On the jet chimney of cigarette clearing machine or at the venthole of steam, indicator light is mounted on the panel of steam-type smoke purifier, heat Quick resistance and partial pressure potential device are attempted by after being cascaded between power supply and ground, the tie point of thermistor and partial pressure potential device Connect with the thresholding end of triggering timer and triggering end by first resistor, trigger the output end of timer by second resistance and The base stage of first triode connects, and the emitter ground connection of the first triode between the base stage and emitter of the first triode and connects There are 3rd resistor, the collector of the first triode to be connect with the base stage of the second triode by the 4th resistance, the first triode Collector is also connect by the 5th resistance with power supply, and the emitter of the second triode connects power supply, the collector of the second triode It is connect with the temperature signal input of microcontroller, the indicator light control signal output of microcontroller passes through the 6th resistance and the three or three The base stage of pole pipe connects, and the emitter ground connection of third transistor between the base stage and emitter of third transistor and is connected to the 7th The collector of resistance, third transistor is connected by one end of the 8th resistance and indicator light, another termination power of indicator light；The One triode and third transistor are NPN type triode, and the second triode is PNP type triode.

The thresholding end of timer is triggered by the first capacity earth, the control voltage end for triggering timer passes through the second capacitance Ground connection, the collector of the second triode pass through third capacity earth.

Trigger the model of timer：NE555P；The model of microcontroller：STM32F103RBT6；Thermistor is NTC Thermistor；Indicator light is LED indicator lights.

The course of work of the vapor (steam) temperature detection circuit is as follows：

When microcontroller is switched on, acquiescence does not detect the level of its temperature signal input in a period of time, and waiting system is initial Change and the booting of each component is run, after each component all normal operations, then certain interval of time executes temperature detection program.

The temperature of steam is higher, and the resistance value of thermistor is bigger, triggers the voltage on the thresholding end and triggering end of timer Also higher and higher, when the voltage is more than threshold value（Corresponding vapor (steam) temperature is more than 80 degree）, trigger timer output end continue High level is exported, is divided by second resistance and 3rd resistor, the base voltage of the first triode is more than 0.7V, the one or three pole Pipe is connected, and the ground level of the second triode is pulled into low level, the second triode ON, high level is sent into the temperature signal of microcontroller Input terminal（Lasting high level）, at this point, the indicator light control signal output of microcontroller exports lasting high level, point always Bright indicator light shows that high temperature components are working properly.

When high-temperature vapor component malfunction, thermistor can't detect high temperature, trigger timer thresholding end and Voltage in triggering end is less than threshold value, and level reversion triggers the output end output low level of timer, the first triode and second Triode ends, the temperature signal input no-voltage of microcontroller（Low level）, at this point, the indicator light control signal of microcontroller is defeated Outlet exports impulse level, and user's high temperature components operation irregularity is reminded in indicator light flicker.

The beneficial effects of the utility model：

1, then the utility model will be detected using the vapor (steam) temperature of thermistor detection steam-type smoke purifier Signal is sent to microcontroller, and microcontroller judges whether the temperature of steam reach a certain height according to the signal received, such as reaches , just indicator light is made to be always on, does not reach such as, just instruction is made to flicker, remind the high temperature components work of user's smoke purifier different Often, smoke purifier is repaired in time, it is ensured that the gas of smoke purifier discharge reaches environmental protection standard, facilitates user Use.

2, the utility model carries out the inspection of vapor (steam) temperature using common devices such as thermistor, triggering timer, triodes It surveys, not only detection is accurate, reliable, but also circuit is simple, production cost is low.

（Four）, description of the drawings：

Fig. 1 is one of the circuit theory schematic diagram of the vapor (steam) temperature detection circuit of steam-type smoke purifier；

Fig. 2 is the two of the circuit theory schematic diagram of the vapor (steam) temperature detection circuit of steam-type smoke purifier.

（Five）, specific implementation mode：

Referring to Fig. 1~Fig. 2, in figure, the vapor (steam) temperature detection circuit of steam-type smoke purifier contain thermistor RST1, Microcontroller U4, partial pressure potential device RP2, triggering timer U1, the first triode Q4, the second triode Q3, third transistor Q5 and Indicator light D9, thermistor RST1 are mounted on the jet chimney of steam-type smoke purifier or at the venthole of steam, instruction Lamp D9 is mounted on the panel of steam-type smoke purifier, thermistor RST1 and partial pressure potential device RP2 be cascaded after simultaneously It is connected between power supply+5V and ground, the tie point of thermistor RST1 and partial pressure potential device RP2 are fixed with triggering by first resistor R8 When device U1 thresholding end THOLD connected with triggering end TRIG, the output end OUT of triggering timer U1 passes through second resistance R9 and the The base stage of one triode Q4 connects, the emitter ground connection of the first triode Q4, between the base stage and emitter of the first triode Q4 And the collector for being connected to 3rd resistor R10, the first triode Q4 is connect by the 4th resistance R7 with the base stage of the second triode Q3, The collector of first triode Q4 is also connect by the 5th resistance R6 with power supply+5V, the emitter connection electricity of the second triode Q3 Source+5V, the collector of the second triode Q3 are connect with the temperature signal input PA8 of microcontroller U4, the indicator light of microcontroller U4 Control signal output PA9 is connect by the 6th resistance R33 with the base stage of third transistor Q5, the emitter of third transistor Q5 Ground connection, between the base stage and emitter of third transistor Q5 and is connected to the 7th resistance R35, the collector of third transistor Q5 passes through 8th resistance R28 is connect with one end of indicator light D9, another termination power+5V of indicator light D9；First triode Q4 and third Triode Q5 is NPN type triode, and the second triode Q3 is PNP type triode.

The thresholding end THOLD for triggering timer U1 passes through the first capacitance C11 ground connection, the control voltage end of triggering timer U1 CVOLT is grounded by the second capacitance C10 ground connection, the collector of the second triode Q3 by third capacitance C12.

Trigger the model of timer U1：NE555P；The model of microcontroller U4：STM32F103RBT6；Thermistor RST1 is NTC thermistor；Indicator light D9 is LED indicator lights.

Thermistor RST1 is cylinder（4MM*25MM）, precision height, good reliability are led with PVC conducting wires, Teflon The conducting wires such as line connect, and are encapsulated with insulation, heat conduction, waterproof material, there is following features：

1:Standard resistance range is wide：1K Ω~500K Ω；

2:Resistance value and B values precision are high, and consistency is good, interchangeable；

3:Good insulating, reliability is high, and reflection speed is fast；

4:Using double-layer sealing technology, there is good insulated enclosure and resistance to mechanical to collide, warping resistance ability, reliability It is high；

5:It can long-term stable work (year resistance value drift rate≤1 ‰)；

6:It can be encapsulated according to the mounting condition used, be convenient for user installation；

7:Use temperature range:- 40~300 DEG C.

The course of work of the vapor (steam) temperature detection circuit is as follows：

When microcontroller U4 bootings, acquiescence a period of time（Such as 5 minutes）The level for not detecting its temperature signal input inside, etc. The booting operation for waiting for system initialization and each component, after each component all normal operations, then certain interval of time executes temperature Degree detection program.

The temperature of steam is higher, and the resistance value of thermistor RST1 is bigger, the thresholding end THOLD of triggering timer U1 and triggering Hold the voltage on TRIG also higher and higher, when the voltage is more than threshold value（3V）When（Corresponding vapor (steam) temperature is more than 80 degree）, triggering The output end OUT of timer U1 persistently exports high level（5V）, divided by second resistance R9 and 3rd resistor R10, the one or three The base voltage of pole pipe Q4 is more than 0.7V, and the ground level of the second triode Q3 is pulled into low level by the first triode Q4 conductings, the Two triode Q3 conductings, high level（5V）It is sent into the temperature signal input PA8 of microcontroller U4（Lasting high level）, at this point, The indicator light control signal output PA9 of microcontroller U4 exports lasting high level, lights indicator light D9 always, shows high temperature group Part is working properly.

When high-temperature vapor component malfunction, thermistor RST1 can't detect high temperature, the door of triggering timer U1 The voltage limited on end THOLD and triggering end TRIG is less than threshold value（2.5V）, level reversion, the output end OUT of triggering timer U1 Export low level, the first triode Q4 and the second triode Q3 cut-offs, the temperature signal input PA8 no-voltages of microcontroller U4 （Low level）, at this point, the indicator light control signal output PA9 of microcontroller U4 exports impulse level, indicator light D9 flickers are reminded User's high temperature components operation irregularity.

Claims (3)

1. a kind of vapor (steam) temperature detection circuit of steam-type smoke purifier, containing thermistor and microcontroller, it is characterized in that：Also Contain partial pressure potential device, triggering timer, the first triode, the second triode, third transistor and indicator light, thermistor peace On the jet chimney of steam-type smoke purifier or at the venthole of steam, indicator light is mounted on steam-type smoke purifier Panel on, thermistor and partial pressure potential device are attempted by after being cascaded between power supply and ground, thermistor and partial pressure electricity The tie point of position device is connect by first resistor with the thresholding end of triggering timer and triggering end, and the output end for triggering timer is logical It crosses second resistance to connect with the base stage of the first triode, the emitter ground connection of the first triode, the base stage and hair of the first triode Between emitter-base bandgap grading and it is connected to 3rd resistor, the collector of the first triode is connect by the 4th resistance with the base stage of the second triode, The collector of first triode is also connect by the 5th resistance with power supply, the emitter connection power supply of the second triode, and the two or three The collector of pole pipe and the temperature signal input of microcontroller connect, and the indicator light control signal output of microcontroller passes through the 6th The base stage of resistance and third transistor connects, the emitter of third transistor ground connection, the base stage and emitter of third transistor it Between and be connected to the 7th resistance, the collector of third transistor is connected by one end of the 8th resistance and indicator light, indicator light it is another One termination power；First triode and third transistor are NPN type triode, and the second triode is PNP type triode.

2. the vapor (steam) temperature detection circuit of steam-type smoke purifier according to claim 1, it is characterized in that：The triggering The control voltage end of timer is triggered by the second capacity earth by the first capacity earth in the thresholding end of timer, and the two or three The collector of pole pipe passes through third capacity earth.

3. the vapor (steam) temperature detection circuit of steam-type smoke purifier according to claim 1 or 2, it is characterized in that：It is described Trigger the model of timer：NE555P；The model of microcontroller：STM32F103RBT6；Thermistor is NTC thermistor； Indicator light is LED indicator lights.