CN204360239U - The temperature sensing controller of install beforehand operating temperature - Google Patents
The temperature sensing controller of install beforehand operating temperature Download PDFInfo
- Publication number
- CN204360239U CN204360239U CN201420773641.6U CN201420773641U CN204360239U CN 204360239 U CN204360239 U CN 204360239U CN 201420773641 U CN201420773641 U CN 201420773641U CN 204360239 U CN204360239 U CN 204360239U
- Authority
- CN
- China
- Prior art keywords
- temperature
- triode
- voltage comparator
- relay
- output terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Control Of Temperature (AREA)
Abstract
The utility model discloses a kind of temperature sensing controller of install beforehand operating temperature, comprise temperature sensor, the output terminal of this temperature sensor is connected with the input end of amplifying circuit; The output terminal of amplifying circuit is connected with the negative phase end of voltage comparator; The output terminal of temperature-control circuit is connected with the positive terminal of voltage comparator; The output terminal of voltage comparator is connected with driving circuit; Driving circuit is connected with relay.The utility model adopts the thermistor of negative temperature coefficient NTC type to obtain temperature signal, can in outdoor temperature lower than engage relay during setting value, then come to compare with design temperature by a voltage comparator, finally export comparative result by voltage comparator and drive relay.Adopt shunt capacitance to prevent external interference, avoid the AC signal of its wire induction to the interference of collecting temperature signal.Back electromotive force when preventing relay from working by protection diode threatens to triode TR2.
Description
Technical field
The utility model relates to temperature field of automatic testing, particularly a kind of temperature sensing controller of install beforehand operating temperature.
Background technology
Often need to realize temperature automatic adjustment in temperature field of automatic testing, adopt common thermistor as temperature sensor.Can in outdoor temperature lower than engage relay during setting value.The resistance of thermistor changes with environment temperature, thus causes the temperature signal of acquisition inaccurate; When the wiring connecting temperature sensor and thermistor is long, the AC signal of its wire induction also can cause work abnormal, therefore needs a kind of energy accurately carry out temperature controlled device according to temperature.
Utility model content
In view of this, technical problem to be solved in the utility model is to provide and a kind of accurately can carries out temperature controlled device according to temperature.
The purpose of this utility model is achieved in that
The temperature sensing controller of the install beforehand operating temperature that the utility model provides, comprises temperature sensor, amplifying circuit, voltage comparator, temperature-control circuit VR1, driving circuit TR2 and relay;
Described temperature sensor is used for collecting temperature signal;
Described amplifying circuit is used for amplifying process to temperature signal;
Described voltage comparator is used for preset temperature value and sampling actual temperature value to compare;
Institute temperature-control circuit VR1 is used for preset temperature value;
Signal is also input in relay by the signal that described driving circuit TR2 exports for the treatment of voltage comparator;
The output terminal of described temperature sensor is connected with the input end of amplifying circuit;
The output terminal of described amplifying circuit is connected with the negative phase end of voltage comparator;
The described output terminal of temperature-control circuit VR1 is connected with the positive terminal of voltage comparator;
The output terminal of described voltage comparator is connected with driving circuit TR2;
Described driving circuit TR2 is connected with relay.
Further, described amplifying circuit comprises the first triode and shunt capacitance Cl; The base stage of described first triode is connected to ground by resistance, and the collector of the first triode is connected with power supply by resistance, the grounded emitter of the first triode; The base stage of described first triode is also connected with shunt capacitance Cl; The described collector output of the first triode is connected with the negative phase end of voltage comparator.
Further, described driving circuit comprises the second triode and protection diode D1; The base stage of described second triode is connected by the output terminal of resistance and voltage comparator, and the collector of the second triode is connected with relay, the grounded emitter of the second triode; Relay two ends in the collector of described second triode are parallel with protection diode D1.
Further, described temperature sensor is the thermistor of negative temperature coefficient NTC type.
Further, also comprise shielding line, described shielding line is arranged on the wire that is connected with temperature sensor.
The beneficial effects of the utility model are: the utility model adopts the thermistor of negative temperature coefficient NTC type to obtain temperature signal as temperature sensor, can in outdoor temperature lower than engage relay during setting value.The resistance of thermistor changes with environment temperature, the voltage of transistor output is changed by the change of detection resistance value, then come to compare with design temperature (i.e. voltage) by a voltage comparator, finally export comparative result by voltage comparator and drive relay.Adopt shunt capacitance Cl to prevent external interference, when the wiring connecting thermistor is long, avoid the AC signal of its wire induction to the interference of collecting temperature signal.Back electromotive force when preventing relay from working by protection diode D1 threatens to triode TR2.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein:
The automatic temperature-adjusting regulating circuit circuit diagram that Fig. 1 provides for the utility model embodiment;
The circuit board drawing that Fig. 2 provides for the utility model embodiment;
The thermistor temp test circuit figure that Fig. 3 provides for the utility model embodiment;
The change schematic diagram of collector voltage when getting the resistance of different R1 that Fig. 4 provides for the utility model embodiment.
Embodiment
Hereinafter with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.Should be appreciated that preferred embodiment only in order to the utility model is described, instead of in order to limit protection domain of the present utility model.
As shown in the figure, the temperature sensing controller of the install beforehand operating temperature that the utility model provides, comprises temperature sensor, amplifying circuit, voltage comparator, temperature-control circuit VR1, driving circuit TR2 and relay;
Described temperature sensor is used for collecting temperature signal;
Described amplifying circuit is used for amplifying process to temperature signal;
Described voltage comparator is used for preset temperature value and sampling actual temperature value to compare;
Institute temperature-control circuit VR1 is used for preset temperature value;
Signal is also input in relay by the signal that described driving circuit TR2 exports for the treatment of voltage comparator;
The output terminal of described temperature sensor is connected with the input end of amplifying circuit;
The output terminal of described amplifying circuit is connected with the negative phase end of voltage comparator;
The described output terminal of temperature-control circuit VR1 is connected with the positive terminal of voltage comparator;
The output terminal of described voltage comparator is connected with driving circuit TR2;
Described driving circuit TR2 is connected with relay.
Described amplifying circuit comprises the first triode and shunt capacitance Cl; The base stage of described first triode is connected to ground by resistance, and the collector of the first triode is connected with power supply by resistance, the grounded emitter of the first triode; The base stage of described first triode is also connected with shunt capacitance Cl; The described collector output of the first triode is connected with the negative phase end of voltage comparator.
Described driving circuit comprises the second triode and protection diode D1; The base stage of described second triode is connected by the output terminal of resistance and voltage comparator, and the collector of the second triode is connected with relay, the grounded emitter of the second triode; Relay two ends in the collector of described second triode are parallel with protection diode D1.
Described temperature sensor is the thermistor of negative temperature coefficient NTC type.
Also comprise shielding line, described shielding line is arranged on the wire that is connected with temperature sensor.
D-53 selected by the thermistor of the temperature sensing controller of the install beforehand operating temperature in the present embodiment, belongs to the thermistor of negative temperature coefficient NTC type.
When negative (one) phase terminal voltage of voltage comparator arranges end higher than temperature, i.e. just (+) phase terminal voltage of comparer, comparer exports as " OFF " state, and output relay does not work (S and B connection).
When environment temperature raises, negative (one) phase terminal voltage of comparer sets terminal voltage lower than temperature, and comparer exports and becomes " ON ", output relay work (S and M connection).
VR1 is for setting voltage corresponding to different temperature values.
The voltage exported from the C end of TR1 has certain scope, and in circuit, the effect of R5, R6 is the voltage regulation limits of restriction VR1, makes it all in the voltage range that the C of TR1 holds, thus makes the whole adjustment territory of VR1 effective.
Back electromotive force when protection diode D1 is for preventing relay from working threatens to triode TR2, selects 1N4001.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described the utility model by referring to preferred embodiment of the present utility model, but those of ordinary skill in the art is to be understood that, various change can be made to it in the form and details, and not depart from the spirit and scope that the utility model limits.
Claims (5)
1. the temperature sensing controller of install beforehand operating temperature, is characterized in that: comprise temperature sensor, amplifying circuit, voltage comparator, temperature-control circuit VR1, driving circuit TR2 and relay;
Described temperature sensor is used for collecting temperature signal; Described amplifying circuit is used for amplifying process to temperature signal; Described voltage comparator is used for preset temperature value and sampling actual temperature value to compare; Institute temperature-control circuit VR1 is used for preset temperature value; Signal is also input in relay by the signal that described driving circuit TR2 exports for the treatment of voltage comparator; The output terminal of described temperature sensor is connected with the input end of amplifying circuit; The output terminal of described amplifying circuit is connected with the negative phase end of voltage comparator; The described output terminal of temperature-control circuit VR1 is connected with the positive terminal of voltage comparator; The output terminal of described voltage comparator is connected with driving circuit TR2; Described driving circuit TR2 is connected with relay.
2. the temperature sensing controller of install beforehand operating temperature according to claim 1, is characterized in that: described amplifying circuit comprises the first triode and shunt capacitance Cl; The base stage of described first triode is connected to ground by resistance, and the collector of the first triode is connected with power supply by resistance, the grounded emitter of the first triode; The base stage of described first triode is also connected with shunt capacitance Cl; The described collector output of the first triode is connected with the negative phase end of voltage comparator.
3. the temperature sensing controller of install beforehand operating temperature according to claim 1, is characterized in that: described driving circuit comprises the second triode and protection diode D1; The base stage of described second triode is connected by the output terminal of resistance and voltage comparator, and the collector of the second triode is connected with relay, the grounded emitter of the second triode; Relay two ends in the collector of described second triode are parallel with protection diode D1.
4. the temperature sensing controller of install beforehand operating temperature according to claim 1, is characterized in that: described temperature sensor is the thermistor of negative temperature coefficient NTC type.
5. the temperature sensing controller of install beforehand operating temperature according to claim 1, is characterized in that: also comprise shielding line, and described shielding line is arranged on the wire that is connected with temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420773641.6U CN204360239U (en) | 2014-12-09 | 2014-12-09 | The temperature sensing controller of install beforehand operating temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420773641.6U CN204360239U (en) | 2014-12-09 | 2014-12-09 | The temperature sensing controller of install beforehand operating temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204360239U true CN204360239U (en) | 2015-05-27 |
Family
ID=53261697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420773641.6U Expired - Fee Related CN204360239U (en) | 2014-12-09 | 2014-12-09 | The temperature sensing controller of install beforehand operating temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204360239U (en) |
-
2014
- 2014-12-09 CN CN201420773641.6U patent/CN204360239U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103671182B (en) | Fan rotation speed control apparatus | |
| CN104747480A (en) | Fan rotating speed adjusting circuit | |
| CN202720071U (en) | Motor controller temperature sampling system | |
| CN205353802U (en) | Temperature regulation apparatus and temperature regulation circuit | |
| CN105223989A (en) | A kind of constant-temperature heating system of adjustable temperature | |
| CN202664977U (en) | Intelligent control DC (direct current) low-voltage electric quilt/blanket and intelligent control circuit thereof | |
| CN204258272U (en) | A kind of converter high accuracy thermal-shutdown circuit | |
| CN203747171U (en) | Temperature control plug board | |
| CN204360239U (en) | The temperature sensing controller of install beforehand operating temperature | |
| CN204188299U (en) | Multichannel IGBT inner NTC high temperature real-time detection circuit | |
| CN204003554U (en) | Cooling fan of frequency converter control circuit | |
| CN205121401U (en) | Electric current source suitable for big current power device testing arrangement | |
| CN105201888A (en) | Intelligent fan | |
| CN204591744U (en) | A kind of automatic speed regulating fan based on operational reliability | |
| CN204423199U (en) | A kind of multipurpose electronic temperature detection gauge tap | |
| CN202673734U (en) | Control circuit for wide-range cooling fan | |
| CN203098341U (en) | Vehicle-mounted fan control system and vehicle-mounted fan | |
| CN204357739U (en) | A kind of control means being applicable to the fan intelligent control gear of vehicle radiation system | |
| CN206741340U (en) | Combing machine temperature control circuit | |
| CN104853511A (en) | Gate driving type low-power temperature measuring system based on precision reverse current source | |
| CN203588094U (en) | Simulation temperature control circuit | |
| CN204679881U (en) | A kind of temperature collection circuit being applicable to single-chip microcomputer | |
| CN203908197U (en) | Safe refrigerator control circuit | |
| CN205105415U (en) | IGBT back pressure protection circuit of electromagnetic heating cooking equipment | |
| CN105486423A (en) | Real-time detection circuit for NTC high temperature in multipath IGBT |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20151209 |
|
| EXPY | Termination of patent right or utility model |