CN201813357U - Circuit for controlling on/off of electrical appliance according to temperature - Google Patents
Circuit for controlling on/off of electrical appliance according to temperature Download PDFInfo
- Publication number
- CN201813357U CN201813357U CN2010202799656U CN201020279965U CN201813357U CN 201813357 U CN201813357 U CN 201813357U CN 2010202799656 U CN2010202799656 U CN 2010202799656U CN 201020279965 U CN201020279965 U CN 201020279965U CN 201813357 U CN201813357 U CN 201813357U
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- lm35d
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Abstract
The utility model discloses a circuit for controlling the on/off of an electrical appliance according to the temperature. The output terminals of two temperature sensors LM35D are connected with the two input terminals of an operational amplifier IC respectively, a regulating subcircuit is connected at the rear part of the temperature sensor LM35D that is connected with the non-inverting input terminal of the operational amplifier IC, the output terminal of the operational amplifier IC is connected with an inverter T3, the inverter T3 is connected with a composite pipe, and the composite pipe is connected with the working circuit of the electrical appliance. The two temperature sensors LM35D are placed indoors and outdoors respectively and set the temperature difference value of the electrical appliance in the working state, the input voltage is compared through the operational amplifier IC and then inverted through the inverter T3, and the composite pipe controls the on/off of the working circuit of the electrical appliance through the composite pipe, so as to achieve the purpose of raising or reducing the indoor temperature. The circuit has simple structure and strong practicability, takes full advantage of natural temperature difference, and greatly reduces waste of resources.
Description
Technical field
The utility model relates to a kind of control circuit, especially is a kind of circuit according to temperature control apparatus switch.
Background technology
Present ventilation, refrigeration plant can only come the Control work state by circuit according to the parameter of artificial setting.The control element of electrical equipment can not be analyzed indoor, outdoor actual temperature, and this temperature difference resource that exists is rationally utilized.With the blower fan is example, when Summer Morning or evening, outdoor temperature is lower than indoor temperature, open blower fan the outdoor low temperature air is introduced the indoor purpose of lowering the temperature of can realizing, and work as noon, outdoor air themperature is higher than indoor temperature, still is in opening as blower fan, indoor temperature is increased, also caused energy waste.
The utility model content
For overcoming above-mentioned technical problem, the utility model provide a kind of simple in structure, can be widely used in ventilating, the circuit according to temperature control apparatus switch of refrigeration plant.
For realizing above-mentioned technical purpose, the utility model is achieved through the following technical solutions: a kind of circuit according to temperature control apparatus switch, be with in two temperature sensor LM35D cut-in operation circuit, and output connected in-phase input end and the inverting input of transport and placing device IC respectively; The resistance R 2 of LM35D rear portion series connection that connects transport and placing device IC in-phase input end, and between LM35D and resistance R 2, pick out one and adjust branch road, adjusting branch road connects power supply and is provided with potentiometer R1, by the voltage drop of potentiometer R1 adjustable resistance R2, to raise the input voltage of transport and placing device IC in-phase input end; The output of transport and placing device IC connects the base stage of the inverter T3 of triode formation by resistance R 5, inverter T3 grounded emitter, collector electrode connects resistance R 6, resistance R 7 respectively, resistance R 6 connects power supply, resistance R 7 connects triode T1 base stage, triode T1 and T2 constitute multiple tube, and the collector electrode of multiple tube connects blower fan circuit, grounded emitter.
Described temperature sensor LM35D is a voltage-type integrated temperature sensor of the prior art, and output voltage directly is directly proportional with Celsius temperature, and sensitivity is 10MV/ ℃, the optional T0-92 of device package model.
The utility model is compared with conventional art has following beneficial effect: place two temperature sensor LM35D indoor, outdoor respectively, and by adjusting the temperature difference numerical value that exists when potentiometer R1 sets ventilation equipment work, by transport and placing device IC carry out voltage ratio after, automatically control the closure of ventilation equipment operating circuit, so that realize indoor intensification, cooling.This circuit structure is simple, practical, and the natural temperature differential resource is rationally utilized, and has reduced the waste of resource greatly.
Description of drawings
Accompanying drawing is the utility model circuit diagram.
Embodiment
Is that embodiment is described further below in conjunction with accompanying drawing to control the blower fan operating state by this circuit.
Referring to accompanying drawing, the pin 1 of a temperature sensor LM35D is connected the inverting input of power supply, pin 3 ground connection, pin 2 connection transport and placing device 1C; The pin 1 of another temperature sensor LM35D is connected power supply, the in-phase input end of pin 2 connection transport and placing device IC, pin 3 connection resistance R 2 and potentiometer R1, resistance R 2 ground connection, potentiometer R1 connects power supply, by the voltage drop of potentiometer R1 adjustable resistance R2, to raise the input voltage of transport and placing device IC in-phase input end; Transport and placing device IC output connects the base stage of inverter T3 by resistance R 5, the collector electrode of inverter T3 connects resistance R 7 and resistance R 6 respectively, resistance R 6 connects power supply, resistance R 7 connects multiple tube, described multiple tube adopts darlington connection to be formed by connecting by triode T1, T2, and the collector electrode of multiple tube, emitter connect the operating circuit of blower fan G.
Described temperature sensor LM35D is a voltage-type integrated temperature sensor of the prior art, and output voltage directly is directly proportional with Celsius temperature, and sensitivity is 10MV/ ℃, the optional T0-92 of device package model.
In the practical application, if when indoor, the outdoor temperature difference is spent greater than T, circuit will start blower fan automatically so that play the purpose of indoor intensification, cooling, because of 1 degree centigrade of the every lifting of LM35D temperature, its voltage drop is 10 millivolts of liftings, so the voltage drop of resistance R 2 is adjusted into the 10T millivolt can arrives above-mentioned purpose by adjusting potentiometer R1.
When doing to heat up control: the LM35D that transport and placing device IC inverting input is connected places outdoor, another LM35D places indoor, when indoor temperature 〉=outdoor temperature or indoor temperature＜outdoor temperature＜indoor temperature+T, transport and placing device IC in-phase input end voltage is greater than inverting input voltage, transport and placing device IC output HIGH voltage, after inverter T3 is reverse, P point electronegative potential, blower fan G does not rotate; When outdoor temperature＞indoor temperature+T, transport and placing device IC reverse inter-input-ing voltage is greater than the homophase input voltage, transport and placing device IC output LOW voltage, after inverter T3 is reverse, P point high potential, blower fan G rotates, the outdoor high temperature air is blown into indoor, plays the purpose of indoor intensification.
When doing cooling control: the LM35D that transport and placing device IC in-phase input end is connected places outdoor, another LM35D places indoor, when indoor temperature≤outdoor temperature or outdoor temperature＜indoor temperature＜outdoor temperature+T, transport and placing device IC homophase input voltage is greater than reverse inter-input-ing voltage, transport and placing device IC output HIGH voltage, after inverter T3 is reverse, P point electronegative potential, blower fan does not rotate; During indoor temperature＞outdoor temperature+T, transport and placing device IC reverse inter-input-ing voltage is greater than the homophase input voltage, transport and placing device IC output LOW voltage, through inverter T3 oppositely after, P point high potential, blower fan G rotation is blown into outdoor Cryogenic air indoor, plays the purpose of room temperature lowering.
Claims (1)
1. circuit according to temperature control apparatus switch is characterized in that: in two temperature sensor LM35D cut-in operation circuit, and output is connected in-phase input end and the inverting input of transport and placing device IC respectively; The resistance R 2 of LM35D rear portion series connection that connects transport and placing device IC in-phase input end, and between LM35D and resistance R 2, pick out one and adjust branch road, adjusting branch road connects power supply and is provided with potentiometer R1, the output of transport and placing device IC connects the base stage of the inverter T3 of triode formation by resistance R 5, inverter T3 grounded emitter, collector electrode connects resistance R 6, resistance R 7 respectively, resistance R 6 connects power supply, resistance R 7 connects triode T1 base stage, triode T1 and T2 constitute multiple tube, the collector electrode of multiple tube connects blower fan circuit, grounded emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202799656U CN201813357U (en) | 2010-08-03 | 2010-08-03 | Circuit for controlling on/off of electrical appliance according to temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202799656U CN201813357U (en) | 2010-08-03 | 2010-08-03 | Circuit for controlling on/off of electrical appliance according to temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201813357U true CN201813357U (en) | 2011-04-27 |
Family
ID=43896293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202799656U Expired - Fee Related CN201813357U (en) | 2010-08-03 | 2010-08-03 | Circuit for controlling on/off of electrical appliance according to temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201813357U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830945A (en) * | 2017-12-24 | 2018-03-23 | 山西工程技术学院 | A kind of hypersensitive temperature sensor |
-
2010
- 2010-08-03 CN CN2010202799656U patent/CN201813357U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107830945A (en) * | 2017-12-24 | 2018-03-23 | 山西工程技术学院 | A kind of hypersensitive temperature sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20110803 |