CN102022763A - A far-infrared furnace temperature control system - Google Patents

Abstract

The utility model provides a far-infrared stove temperature control system, far-infrared stove include a stone or metal plate for standing a stove on as a precaution against fire and a control circuit, temperature control system include: a thermocouple, a thermistor and a thermal fuse; the thermocouple is arranged above the center of the furnace plate, the thermistor is arranged on the side edge of the furnace plate, the thermal fuse is arranged on a connecting wire of the furnace plate, the thermocouple is connected in the control circuit, and the control circuit is also provided with a relay. The output circuit of the relay is connected to a power line of the furnace plate, the input circuit of the relay is connected to the control circuit, and the electric signal of the thermocouple can control the on-off of the relay after being processed by the control circuit. The far infrared furnace temperature control system has the advantages of accurately transmitting temperature information, sensing temperature and controlling to the point.

Description

A kind of far-infrared oven temperature control system

Technical field:

The invention belongs to the temperature control system field of the far-infrared oven in the electrical heating stove and accessory of family expenses, what be specifically related to is a kind of far-infrared oven temperature control system.

Background technology:

Existing far-infrared oven temperature control system is for dividing tired two classes, and a kind of is the temperature controller that adopts the root rod-type, makes the sheet metal switch on stone or metal plate for standing a stove on as a precaution against fire limit when it uses by its thermal expansion, the uniform temperature tripping that can be provided with.Being mated the rotary switch of use, or Electronic Control, is that the length according to the time spent is provided with gear.This technology rod-type temperature requirements is very high, quality quality close accord with temperature accurately, this mode cooperates the Electronic Control can not detected temperatures.Its defective is because thermal expansion metal can reduce its performance in time.Another is controlled for thermocouple cooperates the controllable silicon mode, and thermocouple can temperature-sensitive, gives the signal controllable silicon by single-chip microcomputer, reduces or rising power.But the heating of this kind mode is severe, must join radiator, and easily swashs and wear controllable silicon.Control procedure also is subjected to the temperature shadow to, instability.

Summary of the invention:

At the defective that prior art exists, the purpose of this invention is to provide a kind of above-mentioned defective that can overcome, but achieve effective control, thermal expansion or oxidation do not take place and influence the far-infrared oven temperature control system of precision along with the time.

The present invention solves the technical scheme that its technical problem takes: a kind of far-infrared oven temperature control system, described far-infrared oven comprises a stone or metal plate for standing a stove on as a precaution against fire and a control circuit, and key is that described temperature control system comprises: a thermocouple, a thermistor and a thermal cut-off; Described thermocouple is arranged on the top at stone or metal plate for standing a stove on as a precaution against fire center, described thermistor is arranged on the side of stone or metal plate for standing a stove on as a precaution against fire, described thermal cut-off is arranged on the connecting line of stone or metal plate for standing a stove on as a precaution against fire, and described thermocouple is connected in the control circuit, also is provided with a relay in the described control circuit.

Described relay output loop is connected on the power line of stone or metal plate for standing a stove on as a precaution against fire, and the input circuit of described relay is connected on the control circuit, but the signal of telecommunication of described thermocouple is through the keying of control relay after the processing of control circuit.

Described thermocouple is 7mm～9mm apart from the stone or metal plate for standing a stove on as a precaution against fire centre-height.

Described thermocouple is 8mm apart from the stone or metal plate for standing a stove on as a precaution against fire centre-height.

Described control circuit is a single-chip microcomputer.

Far-infrared oven temperature control system of the present invention has and can accurately transmit temperature information, temperature-sensitive and control and can accomplish the advantage of just giving a hint.

Description of drawings:

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the other embodiment schematic diagram of the present invention.

The specific embodiment:

As shown in Figure 1, a kind of far-infrared oven temperature control system, described far-infrared oven comprise that a stone or metal plate for standing a stove on as a precaution againstfire 1 and acontrol circuit 2 described temperature control systems comprise: athermocouple 11, a thermistor 12 and a thermal cut-off 13; Describedthermocouple 11 is arranged on the top at stone or metal plate for standing a stove on as a precaution againstfire 1 center, described thermistor 12 is arranged on the side of stone or metal plate for standing a stove on as a precaution againstfire 1, described thermal cut-off 13 is arranged on the connecting line of stone or metal plate for standing a stove on as a precaution against fire, and described thermocouple is connected in the control circuit, also is provided with arelay 14 in the described control circuit.Thermocouple is satisfied with center, stone or metal plate for standing a stove on as a precaution against fire hot zone, thermocouple temperature detection point is apart from the horizontal certain altitude of heating wire, be used to detect temperature in the stone or metal plate for standing a stove on as a precaution against fire, when the temperature spot that detects setting, can send signal and give single-chip microcomputer, the control stone or metal plate for standing a stove on as a precaution against fire stops, when temperature decline reaches the amplitude of presetting, can send signal and give single-chip microcomputer, the control stone or metal plate for standing a stove on as a precaution against fire starts.The stone or metal plate for standing a stove on as a precaution against fire connecting line has thermal cut-off, as runs into the temperature control inefficacy, and thermistor lost efficacy, and when single-chip microcomputer lost efficacy, the temperature rise of the short cognition of hot melt forever disconnected to the temperature of presetting, and guarantees to protect stone or metal plate for standing a stove on as a precaution against fire and can not work.Thermistor can stone or metal plate for standing a stove on as a precaution against fire near temperature, different as finding that temperature rise and default temperature spot have, can send signal and give single-chip microcomputer, take to lower category, fall power or stop means such as stone or metal plate for standing a stove on as a precaution against fire work, stop that temperature anomaly raises in the stove.

Describedrelay 14 output loops are connected on the power line of stone or metal plate for standing a stove on as a precaution against fire, and the input circuit of described relay is connected on the control circuit, but the signal of telecommunication of describedthermocouple 11 is through the keying ofcontrol relay 14 after the processing ofcontrol circuit 2.

Described thermocouple is 7mm～9mm apart from the stone or metal plate for standing a stove on as a precaution against fire centre-height.

Described thermocouple is 8mm apart from the stone or metal plate for standing a stove on as a precaution against fire centre-height.The distance of 8mm can effectively detect the stone or metal plate for standing a stove on as a precaution against fire temperature.

Described control circuit is a single-chip microcomputer.Single-chip microcomputer can carry out a plurality of settings to the control temperature, at a plurality of different temperature a plurality of control modes is set.

Claims (5)

1. far-infrared oven temperature control system, described far-infrared oven comprises a stone or metal plate for standing a stove on as a precaution against fire (1) and a control circuit (2), it is characterized in that described temperature control system comprises: a thermocouple (11), a thermistor (12) and a thermal cut-off (13); Described thermocouple (11) is arranged on the top at stone or metal plate for standing a stove on as a precaution against fire (1) center, described thermistor (12) is arranged on the side of stone or metal plate for standing a stove on as a precaution against fire (1), described thermal cut-off (13) is arranged on the connecting line of stone or metal plate for standing a stove on as a precaution against fire, described thermocouple is connected in the control circuit, also is provided with a relay (14) in the described control circuit.

2. far-infrared oven temperature control system according to claim 1, it is characterized in that described relay (14) output loop is connected on the power line of stone or metal plate for standing a stove on as a precaution against fire, the input circuit of described relay is connected on the control circuit, the signal of telecommunication of described thermocouple (11) through control circuit (2) but processing after the keying of control relay (14).

3. far-infrared oven temperature control system according to claim 1 and 2 is characterized in that described thermocouple is 7mm～9mm apart from the stone or metal plate for standing a stove on as a precaution against fire centre-height.

4. far-infrared oven temperature control system according to claim 3 is characterized in that described thermocouple is 8mm apart from the stone or metal plate for standing a stove on as a precaution against fire centre-height.

5. far-infrared oven temperature control system according to claim 1 is characterized in that described control circuit is a single-chip microcomputer.

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