CN201689350U - Constant temperature control device - Google Patents
Constant temperature control device Download PDFInfo
- Publication number
- CN201689350U CN201689350U CN201020192304XU CN201020192304U CN201689350U CN 201689350 U CN201689350 U CN 201689350U CN 201020192304X U CN201020192304X U CN 201020192304XU CN 201020192304 U CN201020192304 U CN 201020192304U CN 201689350 U CN201689350 U CN 201689350U
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- Prior art keywords
- circuit
- control
- pin
- constant temperature
- temperature
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Abstract
The utility model relates to a constant temperature control device which comprises a housing and is characterized in that a control circuit of the device comprises a rectification filter circuit, a voltage-stabilizing circuit, a temperature control circuit and a thermostat main circuit, wherein as the temperature in a thermostat varies, the actuation and the releasing of a relay in the voltage-stabilizing circuit can be controlled through the make-and-break of an electric contact of a thermometer, the make-and-break of the bidirectional triode thyristor serially connected in thermostat main circuit can be controlled through the motion of a normally closed contact of a relay connected in series in a control electrode of a bidirectional triode thyristor, and the temperature in the thermostat is kept at the set value. The device has the advantages of simple structure, high sensitivity, safe and reliable operation, and convenient use, and is suitable for the temperature control of a controllable constant temperature box.
Description
Technical field
The utility model relates to a kind of control device, particularly a kind of thermostatically-controlled equipment.
Background technology
At present, for the control of the temperature in the constant temperature control box, traditional way is the temperature by the manual observation thermometer, manually controls the break-make of power supply, uses inconvenient.Also occurred utilizing thermometer and feedback circuit to realize the temperature device of control automatically in the prior art, but general sensitivity is low, adjustable extent is little, poor work stability.
Summary of the invention
The purpose of this utility model is in order to overcome above-mentioned weak point, and provides a kind of simple in structure, highly sensitive, safe and reliable, easy to use thermostatically-controlled equipment.
The purpose of this utility model is achieved in that a kind of thermostatically-controlled equipment, comprises shell, it is characterized in that its control circuit is made up of current rectifying and wave filtering circuit, mu balanced circuit, temperature-control circuit, constant temperature oven main circuit.AC power exports mu balanced circuit to after current rectifying and wave filtering circuit rectification, filtering, the high and low variation of constant temperature the temperature inside the box, by relay adhesive, the release in the switching control mu balanced circuit of thermometer electric contact, be serially connected in the relay normally closed contact action in the bidirectional triode thyristor control extremely, thereby control is serially connected in bidirectional triode thyristor shutoff, conducting in the constant temperature oven main circuit, keeps the temperature inside the box constant in setting value.Each electronic component is installed in the enclosure, on the panel, extracting power supply cord.
The utility model is applicable to the control of controllable constant-temperature the temperature inside the box because design more than adopting is simple in structure, highly sensitive, safe and reliable, easy to use.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the control circuit block scheme;
Fig. 3 is the control circuit circuit diagram.
Embodiment
Now illustrated embodiment is made detailed description to the utility model in conjunction with the accompanying drawings.
As Fig. 2, shown in Figure 3, the current rectifying and wave filtering circuit I is by power transformer B, bridge rectifier circuit Z, 7812 three-terminal regulator block IC
1, filter capacitor C
1, C
2Form, serial connection fuse F, K switch in the elementary input circuit of B, B time the level two ends connect the Z input end respectively, and the Z output head anode also meets IC
1Input end, C
1Positive pole, the Z negative pole of output end also meets C
1, C
2Negative pole, IC
1Earth terminal, C
2The anodal IC that connects
1Output terminal.The mu balanced circuit II is with TWH8751 on-off circuit ic chip
2Be core composition, wherein IC
21 pin series resistor R
2, R
2The other end also meets C
2Anodal, resistance R
1, R
3One end, IC
25 pin, relay J coil one end, diode D
5Negative pole, the J coil other end, D
5Positive pole also meets IC
24 pin, IC
22 pin connect R
1The other end, IC
23 pin ground connection, R
3The other end also connects normally closed contact J-0, normally opened contact J-2 one end of J, and J-0, the J-2 other end connect light emitting diode LCD respectively
1, LCD
2Positive pole, LCD
1, LCD
2Negative pole and ground connection.The temperature-control circuit III comprises electric contact mercury thermometer T, resistance R
4, J normally closed contact J-1, wherein the electric contact of T connects IC respectively
22 pin, ground connection, R
4, the two ends after the J-1 serial connection connect a central electrode, the control utmost point of bidirectional triode thyristor SCR respectively.Constant temperature oven main circuit IV is composed in series by two central electrodes of pull-up resistor silk Rf, bidirectional triode thyristor SCR, and two ends are ac power input end.Each electronic component is installed in the enclosure, on the panel, extracting power supply cord.
The principle of work of this thermostatically-controlled equipment is as follows: as shown in Figure 3, during use, elder generation is adjusted to the temperature value of setting with electric contact mercury thermometer T and is in the lock state.When the temperature in the constant temperature oven was lower than setting value, the electric contact of thermometer T disconnected, IC
22 pin are noble potential and end, not adhesive of relay J, and bidirectional triode thyristor SCR is triggered and conducting, the pull-up resistor silk Rf heating of switching on, LCD simultaneously
1Light.When the rising of the temperature in the constant temperature oven reached setting value, the electric contact of thermometer T was communicated with, IC
22 pin become electronegative potential and conducting, the relay J adhesive, and its normally opened contact J-2 closure, normally closed contact J-0, J-1 disconnect LCD
2Light, LCD
1Extinguish, bidirectional triode thyristor SCR turn-offs, pull-up resistor silk Rf outage stopping heating, thus temperature constant is in setting value in the automatic control box.
Claims (2)
1. thermostatically-controlled equipment, comprise shell, the control circuit that it is characterized in that it is by current rectifying and wave filtering circuit (I), mu balanced circuit (II), temperature-control circuit (III), constant temperature oven main circuit (IV) is formed, AC power is through current rectifying and wave filtering circuit (I) rectification, export mu balanced circuit (II) after the filtering to, the height of constant temperature the temperature inside the box, the low variation, by leading to of thermometer T electric contact, relay J adhesive in the disconnected control mu balanced circuit (II), discharge, be serially connected in the relay J normally closed contact J-1 action in the bidirectional triode thyristor SCR control extremely, thereby the bidirectional triode thyristor SCR that control is serially connected in the constant temperature oven main circuit (IV) turn-offs, conducting, keep the temperature inside the box constant in setting value, each electronic component is installed in the enclosure, on the panel, extracting power supply cord.
2. a kind of thermostatically-controlled equipment as claimed in claim 1 is characterized in that current rectifying and wave filtering circuit (I) is by power transformer B, bridge rectifier circuit Z, 7812 three-terminal regulator block IC
1, filter capacitor C
1, C
2Form, serial connection fuse F, K switch in the elementary input circuit of B, B time the level two ends connect the Z input end respectively, and the Z output head anode also meets IC
1Input end, C
1Positive pole, the Z negative pole of output end also meets C
1, C
2Negative pole, IC
1Earth terminal, C
2The anodal IC that connects
1Output terminal, mu balanced circuit (II) is with TWH8751 on-off circuit ic chip
2Be core composition, wherein IC
21 pin series resistor R
2, R
2The other end also meets C
2Anodal, resistance R
1, R
3One end, IC
25 pin, relay J coil one end, diode D
5Negative pole, the J coil other end, D
5Positive pole also meets IC
24 pin, IC
22 pin connect R
1The other end, IC
23 pin ground connection, R
3The other end also connects normally closed contact J-0, normally opened contact J-2 one end of J, and J-0, the J-2 other end connect light emitting diode LCD respectively
1, LCD
2Positive pole, LCD
1, LCD
2Negative pole and ground connection, temperature-control circuit (III) comprises electric contact mercury thermometer T, resistance R
4, J normally closed contact J-1, wherein the electric contact of T connects IC respectively
22 pin, ground connection, R
4, the two ends after the J-1 serial connection connect a central electrode, the control utmost point of bidirectional triode thyristor SCR respectively, constant temperature oven main circuit (IV) is composed in series by two central electrodes of pull-up resistor silk Rf, bidirectional triode thyristor SCR, two ends are ac power input end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020192304XU CN201689350U (en) | 2010-05-12 | 2010-05-12 | Constant temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020192304XU CN201689350U (en) | 2010-05-12 | 2010-05-12 | Constant temperature control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689350U true CN201689350U (en) | 2010-12-29 |
Family
ID=43377629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020192304XU Expired - Fee Related CN201689350U (en) | 2010-05-12 | 2010-05-12 | Constant temperature control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201689350U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699153A (en) * | 2014-01-04 | 2014-04-02 | 秦辉 | Thermostatic controller |
| CN104882743A (en) * | 2015-06-03 | 2015-09-02 | 重庆市炙热科技发展有限公司 | Network plug control box |
-
2010
- 2010-05-12 CN CN201020192304XU patent/CN201689350U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699153A (en) * | 2014-01-04 | 2014-04-02 | 秦辉 | Thermostatic controller |
| CN104882743A (en) * | 2015-06-03 | 2015-09-02 | 重庆市炙热科技发展有限公司 | Network plug control box |
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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: 20101229 Termination date: 20120512 |