CN103853205A - Control circuit for maintaining a constant temperature in tunnel drying furnace - Google Patents
Control circuit for maintaining a constant temperature in tunnel drying furnace Download PDFInfo
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- CN103853205A CN103853205A CN201210496501.4A CN201210496501A CN103853205A CN 103853205 A CN103853205 A CN 103853205A CN 201210496501 A CN201210496501 A CN 201210496501A CN 103853205 A CN103853205 A CN 103853205A
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- circuit
- control circuit
- heat pump
- control
- wiring part
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Abstract
A control circuit for maintaining a constant temperature in a tunnel drying furnace is disclosed. The control circuit is mainly composed of a control wiring part and an electrical wiring part. The electrical wiring part adopts a three-phase four-wire system, and includes a power supply control circuit, a voltage conversion circuit, a preheating circuit, a fan and heat pump control circuit; the control wiring part takes a PLC as a core, and controls electrical equipment through controlling a relay switch; the power supply control circuit serves as a main power supply switch circuit of the system, and is composed of a fuse, a regular boot, a power indicator light, a temperature controller and a socket circuit; the voltage conversion circuit through a voltage conversion device converts an AC voltage into a DC low voltage, and provides a working voltage to the controller; the preheating circuit is divided into four stages, uses a solid state relay to control a heater, and controls a temperature of each preheating stage through a heat pump; and a fan and heat pump control circuit through the controller controls an on-off of a relay, controls opening and closing of an AC contactor, so as to control a fan and a heat pump.
Description
Technical field
The present invention relates to a kind of tunnel drying oven, particularly a kind of control circuit that guarantees tunnel drying oven constant temperature.
Background technology
Continuous tunnel furnace claims again tunnel oven, tunnel-type drying furnace, is a kind of industrial warming-up device, and its application is more extensive, can be dried various industrial materials, is one of general drying equipment of enterprise.The electrically heated mode of general employing is to heating in stove, and power consumption is large, and the heat energy producing afterwards for the electric energising of heating has improved the temperature in continuous tunnel furnace, makes excess Temperature in stove, easily damages drying object, causes production loss.Heat pump techniques starts to enter in industrial circle as a kind of new technology, and heat pump has become a kind of development trend because of its unique know-why.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of control circuit that guarantees tunnel drying oven constant temperature, there is feature easy to use simple in structure.
To achieve these goals, the technical solution used in the present invention is:
A kind of control circuit that guarantees tunnel drying oven constant temperature, this main circuit will form by controlling wiring part and electrical wiring part, wherein electrical wiring part is three-phase four-wire system, comprise power control circuit, voltage conversion circuit, preheat circuit, blower fan and heat pump control circuit, control wiring part take PLC as core, by pilot relay switch, electrical equipment is controlled: the total power switch circuit that described power control circuit is system, is made up of fuse, timing start-up, power light, temperature controller and socket circuit; Described voltage conversion circuit is converted to DC low-voltage by voltage conversion device by alternating voltage, for controller provides operating voltage; Described preheat circuit is divided into four-stage, adopts solid-state relay to control well heater, by the temperature of the each warm-up phase of heat pump control; Described blower fan and heat pump control circuit, by the switch of controller pilot relay, are controlled A.C. contactor and are opened and closed, and realize the control to blower fan and heat pump.
Compared with prior art, the present invention controls by the course of work to heat pump, and temperature in tunnel drying oven is controlled, and makes the temperature of tunnel drying oven maintain temperature constant state, guarantees the drying effect of product.
Accompanying drawing explanation
Fig. 1 is the heat pump control circuit electric main wiring diagram of tunnel of the present invention drying oven.
Fig. 2 is the main circuit control chart of heat pump control circuit of the present invention.
Fig. 3 is the temperature sensing circuit figure of heat pump control circuit of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is carried out to more detailed explanation.
The heat pump control circuit electric hookup that is illustrated in figure 1 tunnel of the present invention drying oven, comprises circuit of testing the phase sequence, power control circuit, voltage conversion circuit, preheat circuit, blower fan and heat pump control circuit.Power control circuit is the total power switch circuit of system, is made up of fuse F1, timing start-up PT, power light AL1, temperature controller WKQ and socket circuit Pc Power.Voltage conversion circuit by voltage conversion device by alternating voltage be converted to DC low-voltage ± 24V, ± 12V and ± 5V, for controller provides operating voltage, carry out overvoltage protection by fuse F2.Preheat circuit adopts solid-state relay SSR1, SSR2, SSR3, SSR4 to control heater H R1-4, HR5-8, HR9-12, HR13-16, K5 controls warning device, relay K 0 is controlled air-heater, and the heat pump heat supply in K1 ~ 4 pair each stage is controlled.Fuse F5 is the overcurrent protective device of transportation motor, controls transportation motor carry out the transmission of product by K7.
Fig. 2 is the main circuit control chart of the heat pump control circuit of invention, Fig. 3 is the temperature sensing circuit figure in control circuit, control wiring part take PLC as core, adopt the operating voltage that 24V DC voltage is controller, input end is temperature sensing circuit, output terminal connects relay, by pilot relay switch, electrical equipment is controlled.Controller adopts the CPU224 controller of Siemens to realize the control of circuit each several part, adopts the EM231 of Siemens to gather the temperature in tunnel drying oven.
Claims (1)
1. one kind guarantees the control circuit of tunnel drying oven constant temperature, this main circuit will form by controlling wiring part and electrical wiring part, wherein electrical wiring part is three-phase four-wire system, comprise power control circuit, voltage conversion circuit, preheat circuit, blower fan and heat pump control circuit, it is characterized in that, control wiring part take PLC as core, by pilot relay switch, electrical equipment is controlled: the total power switch circuit that described power control circuit is system, is made up of fuse, timing start-up, power light, temperature controller and socket circuit; Described voltage conversion circuit is converted to DC low-voltage by voltage conversion device by alternating voltage, for controller provides operating voltage; Described preheat circuit is divided into four-stage, adopts solid-state relay to control well heater, by the temperature of the each warm-up phase of heat pump control; Described blower fan and heat pump control circuit, by the switch of controller pilot relay, are controlled A.C. contactor and are opened and closed, and realize the control to blower fan and heat pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210496501.4A CN103853205A (en) | 2012-11-28 | 2012-11-28 | Control circuit for maintaining a constant temperature in tunnel drying furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210496501.4A CN103853205A (en) | 2012-11-28 | 2012-11-28 | Control circuit for maintaining a constant temperature in tunnel drying furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103853205A true CN103853205A (en) | 2014-06-11 |
Family
ID=50860993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210496501.4A Pending CN103853205A (en) | 2012-11-28 | 2012-11-28 | Control circuit for maintaining a constant temperature in tunnel drying furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103853205A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199491A (en) * | 2014-09-05 | 2014-12-10 | 东莞市威力固电路板设备有限公司 | Monitoring system of tunnel oven |
| CN106125785A (en) * | 2016-08-30 | 2016-11-16 | 安庆三维电器有限公司 | A kind of electric control circuit based on PLC |
-
2012
- 2012-11-28 CN CN201210496501.4A patent/CN103853205A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104199491A (en) * | 2014-09-05 | 2014-12-10 | 东莞市威力固电路板设备有限公司 | Monitoring system of tunnel oven |
| CN106125785A (en) * | 2016-08-30 | 2016-11-16 | 安庆三维电器有限公司 | A kind of electric control circuit based on PLC |
| CN106125785B (en) * | 2016-08-30 | 2018-05-04 | 安庆三维电器有限公司 | A kind of electric control circuit based on PLC |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140611 |