JPS61265416A - Catalytic burning device - Google Patents

Abstract

PURPOSE:To enable accurate temp. control by controlling of burning amount of catalytic burner electrically. CONSTITUTION:A solenoid valve mechanism 5 is connected to a fuel supply passage 10 leading to a catalytic burner 16 and also a sensor 18 comprising temp. resistance variable element is placed at a heating area of the catalytic burner 16. A exciting coil 8 of the solenoid valve mechanism 5 is connected to an output terminal of a bridge circuit 22 having two fixed resistances 19, 20, one variable resistance, and the sensor 18 connected each other. Therefore, as burning control of the catalytic burner is exactly made by electric means, the most suitable heating is easily accomplished corresponding to the condition of heated object. This device has little uneven factors in performance as compared to the prior mechanical means and easy handling property and also adjustment of setting temp. are selectively obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a catalytic combustion device used in cordless equipment and the like.

Conventional technology Conventionally, in this type of catalytic combustion device, combustion control, that is, temperature control, is carried out by providing a thermally responsive member such as a bimetal in the heating region of the catalytic burner, and controlling the control valve of the fuel supply path by using the same thermally responsive member. It was linked to.

Problems to be Solved by the Invention However, with the so-called mechanical temperature control means as described above, temperature variations inevitably become large and fine control is impossible. In addition, the set temperature value is likely to be deviated due to dimensional errors, etc., and adjustment thereof requires a great deal of effort.

The present invention solves these conventional problems and provides a catalytic combustion device that can accurately control temperature.

Means for Solving the Problems In order to solve the above problems, the present invention provides an electromagnetic valve mechanism connected to a fuel supply path leading to a catalytic burner, and a temperature-resistance variable element disposed in a heating region of the catalytic burner. A sensor and two fixed resistors.

It is equipped with one variable resistor and a bridge circuit to which the sensor is connected to each month, and the excitation coil of the electromagnetic valve mechanism is connected to the output end of the bridge circuit.

Operation In the above configuration, the combustion amount of the catalytic burner is electrically controlled, thereby making it possible to accurately adjust the temperature.

Furthermore, by varying the resistance value of the variable resistor, the set temperature can be easily adjusted.

Example Examples thereof will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a fuel tank for storing liquefied gas, and a vaporizing section 4 consisting of a lamp wick 2 and a ventilation resistance material 3 is provided. Reference numeral 6 denotes a solenoid valve mechanism connected to the outlet 6 of the vaporizing section 4, which includes a main body 9 having an integral nozzle and an excitation coil 8 wrapped around its outer periphery, and a movable valve mechanism connected to the fuel supply passage 1o inside the main body 9. Valve body 11 made of magnetic material installed inside
and a spring 12 that biases the valve body 11 so as to seal the outlet 6. A mixer 13 is provided opposite the nozzle 7, and a mixing pipe 14 is connected to the mixer 13. Reference numeral 16 denotes a plurality of through holes formed in the front peripheral wall of the mixing tube 14, and 16 is a catalyst lithium obtained by supporting a catalyst on a carrier, which is attached to the front outer periphery of the mixing tube 14 having the through hole 15. It is. 1 indicates a heated object heated by the combustion heat of the catalytic burner 16, and when used as a hair curler, for example, this becomes a part of the curler.

Next, 18 is a sensor consisting of a so-called temperature-resistance change element whose electrical resistance value changes in response to the temperature of the heated body 17, and includes two fixed resistors 19, 20, and one variable resistor. 21 constitutes a bridge circuit 22.

23 is a power supply connected to the input end of the bridge circuit 22. Further, the excitation coil 8 of the electromagnetic valve mechanism 6 is connected to the output end of the bridge circuit 22. - In the above configuration, the liquefied fuel in the fuel tank 1 is vaporized when passing through the ventilation resistance material 3, and is ejected from the nozzle 7 in a gaseous state. Then, this ejected gas is mixed into the mixer 1.
4, the air necessary for combustion is sucked by the ejector action, and then the gas and air are sufficiently mixed as they flow through the mixing tube 14, and the catalyst is released from the through hole 16.
- is supplied to the fuel tank 16.

Here, if ignition is performed by an appropriate means, the catalytic burner 1
Flameless combustion will occur on the outer peripheral surface of No. 6.

The temperature of the heated body 17 heated by the combustion heat of the catalytic burner 16 is detected by a sensor 18 . When the heated body 17 reaches the set temperature, the resistance of the sensor 18 loses its equilibrium due to its relationship with the other variable resistor 21 and the fixed resistors 19 and 20 of the bridge circuit 22, and the output becomes small. As a result, the current flowing through the exciting coil 8 decreases, and the valve body 11 closes the outlet 6 by the action of the spring 12, thereby cutting off the subsequent fuel supply.

Next, when the temperature of the heated body 17 falls below a predetermined value, the output of the bridge circuit 22 increases, and the current to the excitation coil 8 increases, and as a result, the valve body 11 resists the spring 12 and exits again. 6.

In this way, the catalytic burner 16 accompanies the opening/closing operation of the valve body 11.
The heated body 17 is maintained at a predetermined temperature by combustion control.

Further, by changing the resistance value of the variable resistor 21, the set value of the temperature can be arbitrarily adjusted, and therefore, in this embodiment, the optimum temperature can be determined depending on the conditions of the object to be heated.

Effects of the Invention As described above, according to the present invention, the combustion of the catalytic burner can be accurately controlled by electrical means, and the
It is possible to easily perform optimal heating according to the conditions. In addition, compared to conventional mechanical means, it has less variation in performance and is extremely easy to use, and also has excellent effects such as being able to adjust the set temperature at will.

[Brief Description of the Drawings] Fig. 1 is a sectional view of a catalytic combustion device showing an embodiment of the present invention;
FIG. 2 is an electrical circuit diagram. 5... Solenoid valve mechanism, 8... Excitation coil, 10... Fuel supply path, 16... Catalyst burner, 18... Sensor , 19 , 20...
... Fixed resistance, 21 ... Variable resistance, 22.
...Bridge circuit. lθ...Preparation inkstone, Gowa 2t..., Machi Ryojoaki, 22...Arizuji WJ and others translation 2nd figure

Claims (1)

[Claims] A solenoid valve mechanism connected to the fuel supply path leading to the catalytic burner,
The electromagnetic valve mechanism is equipped with a sensor consisting of a temperature-resistance variable element disposed in the heating region of the catalytic burner, two fixed resistors, one variable resistor, and a bridge circuit in which the above-mentioned sensor is connected to each piece. The excitation coil of the catalytic combustion device is connected to the output end of the bridge circuit.