CN204856251U - High accuracy temperature -control circuit - Google Patents
High accuracy temperature -control circuit Download PDFInfo
- Publication number
- CN204856251U CN204856251U CN201520565046.8U CN201520565046U CN204856251U CN 204856251 U CN204856251 U CN 204856251U CN 201520565046 U CN201520565046 U CN 201520565046U CN 204856251 U CN204856251 U CN 204856251U
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- Prior art keywords
- pin
- voltage
- negative pole
- control circuit
- high accuracy
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- Expired - Fee Related
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Abstract
The utility model discloses a high accuracy temperature -control circuit, including DC voltage, thermistor, relay switch, controlling resistor, 555 time -base circuit chip, resistance, LED lamp, 555 time -base circuit chip pin include pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8 pin 4, pin 8 are connected with direct current voltage cathode, pin 1, pin 5 are connected with the DC voltage negative pole, pin 2, pin 6 all are connected with direct current voltage cathode, thermistor, pin 2, pin 6 all are connected with controlling resistor, DC voltage negative pole, after establishing ties, pin 3 inserts the DC voltage negative pole with relay switch, be connected after resistance, LED lamp are established ties mutually with between direct current voltage cathode, the negative pole, pin 3 is connected with the LED lamp. The utility model discloses the usage is extensive, the precision is higher, low in cost, debug easy.
Description
Technical field
The utility model relates to a kind of high accuracy temperature control circuit, belongs to heating arrangement control circuit technical field.
Background technology
At present, what the electrical equipment with heating function occurred in people's daily life more and more comes.In order to better control apparatus works, in these electrical equipment, all apply temperature-control circuit.But existing temperature-control circuit more complicated, and function singleness, be unfavorable for reducing enterprise cost.
Utility model content
Object: in order to overcome the deficiencies in the prior art, the utility model provides a kind of high accuracy temperature control circuit.
Technical scheme: for solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of high accuracy temperature control circuit, comprise DC voltage 1, thermistor 2, relay switch 3, adjustable resistance 4, 555 time base circuit chips 5, resistance 6, LED 7, described 555 time base circuit chip 5 pins comprise pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, described pin 4, pin 8 is connected with DC voltage 1 positive pole, described pin 1, pin 5 is connected with DC voltage 1 negative pole, described pin 2, pin 6 all with DC voltage 1 positive pole, thermistor 2 is connected, described pin 2, pin 6 all with adjustable resistance 4, DC voltage 1 negative pole is connected, described pin 3 accesses DC voltage 1 negative pole after connecting with relay switch 3, described resistance 6, with DC voltage 1 positive pole after LED 7 is in series, be connected between negative pole, described pin 3 is connected with LED 7, pin 7 is vacant.
Also comprise diode 8, described diode 8 is in parallel with relay switch 3.
Also comprise electric capacity 9, between described pin 5 and DC voltage 1 negative pole, be in series with electric capacity 9.
Described LED 7 comprises green light 71, red light 72, and described green light 71, red light 72 are in series, and described pin 3 intersects between green light 71, red light 72.
Beneficial effect: a kind of high accuracy temperature control circuit that the utility model provides, utilizes the control of 555 time base circuit chip pins, 3 pairs of relay switches, realizes the switch of heating electrical appliance.Meanwhile, red light, green light can fast understand heating electrical appliance working condition.The design is of many uses, precision is higher, cheap, debug easily.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, a kind of high accuracy temperature control circuit, comprise DC voltage, thermistor, relay switch, adjustable resistance, 555 time base circuit chips, resistance, LED, described 555 time base circuit chip pins comprise pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, described pin 4, pin 8 is connected with DC voltage electrode, described pin 1, pin 5 is connected with DC voltage negative pole, described pin 2, pin 6 all and DC voltage electrode, thermistor is connected, described pin 2, pin 6 all and adjustable resistance, DC voltage negative pole is connected, described pin 3 accesses DC voltage negative pole after connecting with relay switch, described resistance, with DC voltage electrode after LED is in series, be connected between negative pole, described pin 3 is connected with LED.
Also comprise diode, described diode and relay switch are in parallel.
Also comprise electric capacity, between described pin 5 and DC voltage negative pole, be in series with electric capacity.
Described LED comprises green light, red light, and described green light, red light are in series, and described pin 3 intersects between green light, red light.
Concrete using method is as follows: during use, the thermistor be connected and adjustable resistance is debugged ceiling temperature detect resistance with pin 6, the thermistor be connected and adjustable resistance is debugged lower limit temperature detect resistance with pin 2.Upon a drop in temperature, when pin 2 current potential is lower than 1/3Vcc, pin 3 exports high level, K adhesive, and heating electrical appliance is started working, when red.When temperature is raised, when pin 6 current potential is higher than 2/3Vcc, pin 3 output low level, K discharges, and heating electrical appliance is started working, green light.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. a high accuracy temperature control circuit, comprise DC voltage, thermistor, relay switch, it is characterized in that: also comprise adjustable resistance, 555 time base circuit chips, resistance, LED, described 555 time base circuit chip pins comprise pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, described pin 4, pin 8 is connected with DC voltage electrode, described pin 1, pin 5 is connected with DC voltage negative pole, described pin 2, pin 6 all and DC voltage electrode, thermistor is connected, described pin 2, pin 6 all and adjustable resistance, DC voltage negative pole is connected, described pin 3 accesses DC voltage negative pole after connecting with relay switch, described resistance, with DC voltage electrode after LED is in series, be connected between negative pole, described pin 3 is connected with LED, pin 7 is vacant.
2. a kind of high accuracy temperature control circuit according to claim 1, it is characterized in that: also comprise diode, described diode and relay switch are in parallel.
3. a kind of high accuracy temperature control circuit according to claim 1, is characterized in that: also comprise electric capacity, is in series with electric capacity between described pin 5 and DC voltage negative pole.
4. a kind of high accuracy temperature control circuit according to claim 1, it is characterized in that: described LED comprises green light, red light, described green light, red light are in series, and described pin 3 intersects between green light, red light.
5. a kind of high accuracy temperature control circuit according to claim 1, is characterized in that: described 555 time base circuit chips adopt NE555.
6. a kind of high accuracy temperature control circuit according to claim 1, is characterized in that: described thermistor adopts negative temperature coefficient thermis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520565046.8U CN204856251U (en) | 2015-07-31 | 2015-07-31 | High accuracy temperature -control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520565046.8U CN204856251U (en) | 2015-07-31 | 2015-07-31 | High accuracy temperature -control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204856251U true CN204856251U (en) | 2015-12-09 |
Family
ID=54746787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520565046.8U Expired - Fee Related CN204856251U (en) | 2015-07-31 | 2015-07-31 | High accuracy temperature -control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204856251U (en) |
-
2015
- 2015-07-31 CN CN201520565046.8U patent/CN204856251U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cen Yifang Inventor before: Jiang Jin |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170110 Address after: 528305 Shunde, Foshan, Ronggui, the base of the four North Road, No. three, No., No. 40, No. Patentee after: Shunde City, Foshan Jiang Feng Electrical Appliance Co., Ltd. Address before: 212000 Zhenjiang City, Jiangsu Province town Jianbi Jingkou District No. 108 Jiang Village four groups Patentee before: Jiang Jin |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20190731 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |