CN202477150U - Constant temperature electric blanket - Google Patents
Constant temperature electric blanket Download PDFInfo
- Publication number
- CN202477150U CN202477150U CN2012200893968U CN201220089396U CN202477150U CN 202477150 U CN202477150 U CN 202477150U CN 2012200893968 U CN2012200893968 U CN 2012200893968U CN 201220089396 U CN201220089396 U CN 201220089396U CN 202477150 U CN202477150 U CN 202477150U
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- resistance
- thermistor
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- electric blanket
- temperature
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Abstract
The utility model discloses a constant temperature electric blanket, which comprises an electric blanket and a temperature controller, wherein resistance wires are arranged in the electric blanket, the temperature controller comprises a power circuit and a temperature control circuit; the power circuit comprises a transformer, a full-wave rectification bridge and a three-terminal voltage stabilizing block; the temperature control circuit comprises a thermistor, a potentiometer, a first resistor, a second resistor, a first crystal triode, a second crystal triode and a relay; the primary side of the transformer is connected with a power supply socket, the secondary side of the transformer is connected with two input ends of the full-wave rectification bridge, the positive output end of the full-wave rectification bridge is connected with the input end of the three-terminal voltage stabilizing block; the thermistor, the potentiometer, the first resistor and the second resistor are connected to form a temperature sampling bridge; and the normally open contact of the relay is connected with a power supply loop of the resistance wires in series, and the thermistor is arranged in the electric blanket. The constant temperature electric blanket has the functions of temperature control, and automatic powering on/off, and has the advantages of reliable operation performance, safety and convenience for using and low cost.
Description
Technical field
The utility model relates to electric blanket, particularly thermostatic electric heating blanket.
Background technology
Electric blanket is called electric mattress again, is a kind of electric heating products, and its electrical appliance part mainly is made up of power switch and resistance wire; Power switch is divided into high, medium and low three gears; Can carry out the third gear power supply, after the energising, electric blanket can continue heating; Even select low-grade power supply, owing to can not carry out temperature control.So temperature can continue to rise, the frequent operation switch of having to during use since do not have automatic temperature-controlled switching electric work can, use both dangerously, also inconvenient, if temperature is too high, because of not outage in time of carelessness, may cause fire again.
The utility model content
For addressing the above problem, the purpose of the utility model provides a kind of thermostatic electric heating blanket, has the automatic switching electric work ability of temperature control, and reliable working performance is safe and convenient to use, with low cost.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of thermostatic electric heating blanket; Form by electric blanket and temperature controller; The electric blanket set inside has resistance wire, it is characterized in that: said temperature controller is made up of power circuit and temperature control circuit, and power circuit is made up of transformer, full-wave rectification bridge, three-terminal regulator block; Temperature control circuit is made up of thermistor, potentiometer, a resistance, No. two resistance, a transistor, No. two transistors, relays; The former limit of transformer is connected with attaching plug, and the secondary of transformer is connected with two inputs of full-wave rectification bridge, and the positive output end of full-wave rectification bridge is connected with the input of three-terminal regulator block; Thermistor, potentiometer, a resistance, No. two resistance connect into temperature sampling electric bridge; The circuit of temperature sampling electric bridge constitutes: an end of thermistor is connected with the output of three-terminal regulator block, is connected with the negative output terminal of full-wave rectification bridge behind the other end series connection potentiometer of thermistor, and an end of a resistance is connected with the output of three-terminal regulator block; Be connected with the negative output terminal of full-wave rectification bridge behind No. two resistance of other end series connection of a resistance; The base stage of a transistor is connected on the contact between thermistor and the potentiometer, and the emitter stage of a transistor is connected on the contact between resistance and No. two resistance, and the base stage of No. two transistors is connected with the colelctor electrode of a transistor; Be connected with the output of three-terminal regulator block behind the coil of the colelctor electrode SRE of No. two transistors; The emitter stage of No. two transistors is connected with the negative output terminal of full-wave rectification bridge, and the normally opened contact of relay is connected on the current supply circuit of resistance wire, and said thermistor is arranged in the electric blanket.
The utility model has following positive beneficial effect:
The utility model utilizes the thermistor of negative temperature coefficient to carry out temperature and regulates automatically, constitutes biasing circuit with thermistor and potentiometer, utilizes its dividing potential drop for switching tube triggering signal to be provided; Switching tube is made up of a transistor, and when electric blanket temperature during a little less than design temperature, the resistance of thermistor raises; The base potential of a transistor descends, as long as the potential difference of the base stage of a transistor and emitter stage is greater than 0.6V, a transistor is with regard to conducting; No. two also conductings of transistor, the coil of relay gets electric, and its normally opened contact is closed; The current supply circuit of resistance wire is connected, and begins heating, and the temperature of electric blanket begins to rise.When electric blanket temperature during a little more than design temperature, the resistance of thermistor reduces, as long as the potential difference of the base stage of a transistor and emitter stage is less than 0.6V, No. one transistor just ends; No. two transistor also ends, the coil losing electricity of relay, and its normally opened contact breaks off, the not conducting of current supply circuit of resistance wire; Stop heating, the temperature of electric blanket begins again to descend, when electric blanket temperature during a little less than design temperature; The coil of relay is electricity again, and its normally opened contact is closed, the conducting again of the current supply circuit of resistance wire; Begin heating, so repeatedly, make electric blanket temperature control within the specific limits.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model one embodiment.
The specific embodiment
Please with reference to Fig. 1; The utility model is a kind of thermostatic electric heating blanket; Be made up of electric blanket 1 and temperature controller, electric blanket 1 set inside has resistance wire 2, and temperature controller is made up of power circuit and temperature control circuit; Power circuit is made up of transformer B1, full-wave rectification bridge D1-D4, three-terminal regulator block LM7824, and temperature control circuit is made up of thermistor Rt, potentiometer W1, resistance R 1, No. two resistance R 2, a transistor BG1, No. two transistor BG2, relays.
The former limit of transformer B1 is connected with attaching plug; The secondary of transformer B1 is connected with two inputs of full-wave rectification bridge D1-D4; The positive output end of full-wave rectification bridge D1-D4 is connected with the input of three-terminal regulator block LM7824, and full-wave rectification bridge D1-D4 is made up of four diodes.
Thermistor Rt, potentiometer W1, resistance R 1, No. two resistance R 2 connect into temperature sampling electric bridge; The circuit of temperature sampling electric bridge constitutes: the end of thermistor Rt is connected with the output of three-terminal regulator block LM7824; Be connected with the negative output terminal of full-wave rectification bridge D1-D4 behind the other end series connection potentiometer W1 of thermistor Rt; One end of a resistance R 1 is connected with the output of three-terminal regulator block LM7824; No. two resistance R of other end series connection 2 backs of a resistance R 1 are connected with the negative output terminal of full-wave rectification bridge D1-D4; The base stage of a transistor BG1 is connected on the contact F between thermistor Rt and the potentiometer W1; The emitter stage of a transistor BG1 is connected on the contact T between resistance R 1 and No. two resistance R 2; The base stage of No. two transistor BG2 is connected with the colelctor electrode of a transistor BG1, is connected with the output of three-terminal regulator block LM7824 behind the coil J of the colelctor electrode SRE of No. two transistor BG2, and the emitter stage of No. two transistor BG2 is connected with the negative output terminal of full-wave rectification bridge D1-D4; The normally opened contact K1 of relay is connected on the current supply circuit of resistance wire 2, and thermistor Rt is arranged in the electric blanket 1.No. one transistor BG1 is made up of the positive-negative-positive triode.No. two transistor BG2 is made up of NPN type triode.Potentiometer W1 is made up of variable resistor.
The operation principle of the utility model is following, during use, and close switch K; K switch is a battery main switch, and regulator potentiometer W1 sets the temperature of electric blanket then; Setting value is 36.5 degrees centigrade, and the setting of temperature is that three-terminal regulator block LM7824 provides the DC voltage output of 24V by the parameter determining of temperature sampling electric bridge; The resistance of resistance R 1, No. two resistance R 2 equates, then the T current potential stuck-at-of ordering is 2 volts, and thermistor Rt is the thermistor of negative temperature coefficient; Electric blanket temperature is high more, and the resistance of thermistor Rt is more little, and the F point voltage is high more.And electric blanket temperature is low more, and the resistance of thermistor Rt is just big more, and the F point voltage is just low more.When electric blanket temperature a little less than 36.5 degrees centigrade of design temperatures, when reaching 36.3 degrees centigrade, the resistance of thermistor Rt raises; Voltage that F is ordered descends, as long as the potential difference of the base stage of a transistor BG1 and emitter stage is greater than 0.6V, a transistor BG1 is with regard to conducting; No. two also conductings of transistor BG2, the coil J of relay gets electric, and its normally opened contact K1 is closed; The current supply circuit conducting of resistance wire 2 begins heating, and the temperature of electric blanket begins to rise.When electric blanket temperature during a little more than 36.5 degrees centigrade of design temperatures, when reaching 36.7 degrees centigrade, the resistance of thermistor Rt reduces, the voltage rising that F order; As long as the potential difference of the base stage of a transistor BG1 and emitter stage is less than 0.6V, No. one transistor BG1 just ends, and No. two transistor BG2 also ends, the coil J dead electricity of relay; Its normally opened contact K1 breaks off, and the not conducting of current supply circuit of resistance wire 2 stops heating; The temperature of electric blanket begins to descend, when electric blanket temperature a little less than 36.5 degrees centigrade of design temperatures, when reaching 36.3 degrees centigrade; The coil J of relay is electricity again, and its normally opened contact K1 is closed, the current supply circuit conducting of resistance wire 2; Begin heating, so repeatedly, electric blanket temperature is controlled at design temperature differs in 0.2 degree centigrade of left and right scope.
Claims (1)
1. thermostatic electric heating blanket; Form by electric blanket and temperature controller; The electric blanket set inside has resistance wire, it is characterized in that: said temperature controller is made up of power circuit and temperature control circuit, and power circuit is made up of transformer, full-wave rectification bridge, three-terminal regulator block; Temperature control circuit is made up of thermistor, potentiometer, a resistance, No. two resistance, a transistor, No. two transistors, relays; The former limit of transformer is connected with attaching plug, and the secondary of transformer is connected with two inputs of full-wave rectification bridge, and the positive output end of full-wave rectification bridge is connected with the input of three-terminal regulator block; Thermistor, potentiometer, a resistance, No. two resistance connect into temperature sampling electric bridge; The circuit of temperature sampling electric bridge constitutes: an end of thermistor is connected with the output of three-terminal regulator block, is connected with the negative output terminal of full-wave rectification bridge behind the other end series connection potentiometer of thermistor, and an end of a resistance is connected with the output of three-terminal regulator block; Be connected with the negative output terminal of full-wave rectification bridge behind No. two resistance of other end series connection of a resistance; The base stage of a transistor is connected on the contact between thermistor and the potentiometer, and the emitter stage of a transistor is connected on the contact between resistance and No. two resistance, and the base stage of No. two transistors is connected with the colelctor electrode of a transistor; Be connected with the output of three-terminal regulator block behind the coil of the colelctor electrode SRE of No. two transistors; The emitter stage of No. two transistors is connected with the negative output terminal of full-wave rectification bridge, and the normally opened contact of relay is connected on the current supply circuit of resistance wire, and said thermistor is arranged in the electric blanket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200893968U CN202477150U (en) | 2012-03-12 | 2012-03-12 | Constant temperature electric blanket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200893968U CN202477150U (en) | 2012-03-12 | 2012-03-12 | Constant temperature electric blanket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202477150U true CN202477150U (en) | 2012-10-10 |
Family
ID=46951618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200893968U Expired - Fee Related CN202477150U (en) | 2012-03-12 | 2012-03-12 | Constant temperature electric blanket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202477150U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984377A (en) * | 2014-05-15 | 2014-08-13 | 常州机电职业技术学院 | Electric blanket temperature controller |
| CN104490161A (en) * | 2014-12-29 | 2015-04-08 | 黄俊柳 | Temperature-adjustable mattress |
| CN106444921A (en) * | 2016-12-07 | 2017-02-22 | 重庆依凯科技有限公司 | Temperature control circuit designed by adopting full-wave rectifier bridge |
| CN111542151A (en) * | 2020-06-17 | 2020-08-14 | 东莞职业技术学院 | Lamp control circuit and lamp thereof |
| CN112698674A (en) * | 2021-01-04 | 2021-04-23 | 陈丽 | Gynecological nursing cleaning device control circuit |
-
2012
- 2012-03-12 CN CN2012200893968U patent/CN202477150U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103984377A (en) * | 2014-05-15 | 2014-08-13 | 常州机电职业技术学院 | Electric blanket temperature controller |
| CN103984377B (en) * | 2014-05-15 | 2016-05-25 | 常州机电职业技术学院 | Electric blanket temperature controller |
| CN104490161A (en) * | 2014-12-29 | 2015-04-08 | 黄俊柳 | Temperature-adjustable mattress |
| CN106444921A (en) * | 2016-12-07 | 2017-02-22 | 重庆依凯科技有限公司 | Temperature control circuit designed by adopting full-wave rectifier bridge |
| CN111542151A (en) * | 2020-06-17 | 2020-08-14 | 东莞职业技术学院 | Lamp control circuit and lamp thereof |
| CN112698674A (en) * | 2021-01-04 | 2021-04-23 | 陈丽 | Gynecological nursing cleaning device control circuit |
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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: 20121010 Termination date: 20140312 |