CN86203224U - Over-temp. warner - Google Patents
Over-temp. warner Download PDFInfo
- Publication number
- CN86203224U CN86203224U CN 86203224 CN86203224U CN86203224U CN 86203224 U CN86203224 U CN 86203224U CN 86203224 CN86203224 CN 86203224 CN 86203224 U CN86203224 U CN 86203224U CN 86203224 U CN86203224 U CN 86203224U
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Abstract
The utility model discloses an over-temp. Accident warner, which is suitable for the over-temp. Monitoring of the components of mechanical equipment, electrical equipment, etc.; when the preset temperature is reached, audible and visual alarm is sent out; thermal parameter is converted to electrical signal by the thermoelectric conversion circuit of the utility model; an inverter is triggered, and the power supply switch transistor is controlled by the signal output of the inverter; the working power supply of the regulation circuit is supplied; a piezoelectric buzzer sends out acoustic alarm when obtained electricity, and simultaneously an LED lamp is lighted; the accident place is indicated. The entire circuit is composed of contactless switch circuits, and the reliability is high.
Description
When the utility model is parts generation overheating operation accidents such as a kind of detection plant equipment, electric equipment, send the device of sound and light alarm.
Existing pick-up unit generally adopts temperatuer detector or has temperatuer detector, thermopair of contact etc., and the temperature-detecting device of selling on the market is exactly these forms.This device volume is big, fragile, have the contact, alarm will increase in addition, therefore brings installations, maintenance, manages cumbersomely, and reliability is also lower.
The purpose of this utility model is that a kind of contactless overtemperature alarm device will be provided, and can send audible and visual alarm when reaching predetermined temperature.
The purpose of this utility model is to realize with following method: it is to be the overtemperature detecting element with the PTC thermistor, temperature variation by detected position, cause the change in resistance of detecting element, change the circuit output end current potential, export through the signal of phase inverter and to control the power switch triode, supply with the working power of mu balanced circuit, piezoelectric buzzer obtains to send audible alarm after the stabilized voltage supply, and by the LED light lamp indication site of an accident.
Further specify below in conjunction with the utility model embodiment and accompanying drawing.
Fig. 1 is the overtemperature alarm circuit diagram that the utility model proposes.
Below with reference to Fig. 1 circuit structure and principle of work are described: this device is made up of thermoelectric change-over circuit, phase inverter, power switch triode, stabilized voltage supply, piezoelectricity buzzer, LED light lamp.
Thermoelectric change-over circuit is by PTC thermistor 1, pull-up resistor 2, and triode 3 is formed.This circuit is to be bonded at one or more thermistors 1 that plant equipment or electric equipment need detect the position with burying underground or being stained with, after series connection, make the following biasing resistance of triode 3, because thermistor 1 is when temperature controlling point is following, resistance is very little, the resistance of last biasing resistance 2 is very big, so be lower than the turn-on threshold current potential, therefore triode 3 is to be in cut-off state when normal working temperature, its collector output is noble potential, triode 4 conducting that is triggered, power switch triode 5 ends, thereby the output of the collector non-transformer of power switch triode 5, so piezoelectric buzzer 8 and LED light lamp 9 are not all worked.The series connection number of thermistor 1 is good with 1-5, to the point for measuring temperature at the optional 1-5 of an equipment place.
When if the parts of detected plant equipment or electric equipment surpass predetermined originally working temperature, the resistance of thermistor 1 increases rapidly, change intrinsic standoff ratio with last biasing resistance 2, make triode 3 conductings, its collector output is electronegative potential, force triode 4 to end, power switch triode 5 is open-minded, the collector of power switch triode 5 has just become a transmission line of electricity at this moment, after stabilivolt 6, triode 7 voltage stabilizings, voltage supply electric buzzer 8 sends interrupted audible alarm, and LED light lamp 9 is pointed out accident spot simultaneously.LED light lamp 9 can make flash of light into, and hummer 8 also can make into other forms of.
Because in actual production process; many places are not allow careless shutdown; perhaps as long as remind the staff; load just can meet the demands with adjusting by some requisite measures; although this overtemperature alarm is simple; but also having solved the problem of this respect, but also can do the remote centralized monitoring, is very much practical.
Claims (2)
1, a kind of overtemperature alarm device of being made up of thermoelectric change-over circuit, phase inverter, power switch triode, stabilized voltage supply, piezoelectric buzzer, LED light lamp and detecting element is characterized in that:
The lead-in wire of a, PTC thermistor 1, the base stage of an end and triode 3 is joined, and the other end inserts common point,
The base stage of the collector of b, triode 3 and triode 4 is joined,
The collector of c, triode 4 joins by the base stage of resistance and triode 5.
2, overtemperature alarm device according to claim 1 is characterized in that the PTC thermistor 1 that is cascaded is 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86203224 CN86203224U (en) | 1986-05-15 | 1986-05-15 | Over-temp. warner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86203224 CN86203224U (en) | 1986-05-15 | 1986-05-15 | Over-temp. warner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86203224U true CN86203224U (en) | 1987-03-18 |
Family
ID=4806570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86203224 Withdrawn CN86203224U (en) | 1986-05-15 | 1986-05-15 | Over-temp. warner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86203224U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169342B (en) * | 2007-10-31 | 2010-06-09 | 王亮德 | Cable adapter temperature monitoring system |
-
1986
- 1986-05-15 CN CN 86203224 patent/CN86203224U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169342B (en) * | 2007-10-31 | 2010-06-09 | 王亮德 | Cable adapter temperature monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |