JPH05149530A - Catalyst burner - Google Patents

Abstract

PURPOSE:To make it possible to control the amount of hot air freely in response to the conditions of an object to be dried. CONSTITUTION:A flow rate control valve 23 is installed to a fuel section 2 so as to control the amount of gas ejected from a nozzle 22. An air volume sensor 33 is installed to an air supply section 3 so as to directly detect the air volume of a fan 32. A temperature sensor 82 is installed to a catalyst layer 81 of a combustion section 8 where a control section 4 is adapted to transmit a control signal to the flow rate control valve 23 based on detection signals from the air volume sensor 23 and the temperature sensor 82. Therefore, when the air volume to be fed to the catalyst layer 81 is changed by manipulating an air volume switch over dial of a switching section arbitrarily, the amount of fuel gas equivalent to the air volume and the temperature of the catalyst layer 81 is supplied to a mixing section 6 from the nozzle 22, which forces the mixed air of the fuel gas and air to attain catalytic combustion in the catalyst layer 81 at the optimum condition and discharging hot air. It is, therefore, possible to control the amount of hot air freely so as to conform to the condition of an object to be dried.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention utilizes a gas heat source to
The present invention relates to a catalytic combustion device suitable for drying hair, clothes or body hair of pets.

[0002]

2. Description of the Related Art In order to stabilize the combustion state of a conventional catalytic combustion apparatus of this type, for example, in Japanese Patent Laid-Open No. 62-268913, the amount of air entering a mixing chamber is restricted by a tapered tube, In Japanese Laid-Open Patent Publication No. 62-268956, a negative characteristic thermistor or a temperature sensing element is used to change the rotation speed of a motor in a blower section. A solenoid valve and a proportional valve provided in the supply passage are operated.

[0003]

In any of the above-mentioned conventional catalytic combustion devices, in any case, the amount of hot air discharged from the device is changed in accordance with the state of the object to be dried, so that it is sent to the catalyst layer. If you change the air volume,
Since the air volume is not directly detected, the fuel gas volume corresponding to the air volume change cannot be controlled and combustion in the catalyst layer may become unstable. Therefore, it is possible to change the hot air volume. was difficult.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a catalytic combustion apparatus capable of freely adjusting the amount of hot air according to the state of an object to be dried.

[0005]

In order to solve the above problems, a catalytic combustion apparatus according to claim 1 is provided in a gas tank for containing a fuel gas, a nozzle for ejecting the fuel gas from the gas tank, and a path of the nozzle. And a fuel unit including a flow rate adjusting valve, a fan including a motor, a fan rotated by the motor, and an air volume sensor that detects an air volume of the fan,
A control unit that outputs a control signal to the flow rate control valve according to the detection signal of the air flow sensor, a switch unit that operates to arbitrarily set the air flow of the fan, a mixing unit that creates a mixed gas of fuel gas and air, and a mixed gas The ignition unit for igniting the engine and the combustion unit provided with a catalyst layer for catalytically burning the mixed gas sent from the mixing unit are provided.

Further, in the catalytic combustion apparatus according to the second aspect, a temperature sensor is further provided in the combustion section, and the control section outputs a control signal to the flow rate adjusting valve according to a detection signal of the temperature sensor. It is configured.

[0007]

According to the catalytic combustion device of the first aspect, the fuel section is provided with a flow rate adjusting valve for adjusting the amount of fuel gas ejected from the nozzle, and the air blowing section is provided with an air volume sensor for directly detecting the air volume of the fan. Since the control unit outputs a control signal to the flow rate adjusting valve according to the detection signal of the air volume sensor, even if the air volume of the air sent to the catalyst layer is changed, the amount of fuel gas corresponding to the air volume is changed from the nozzle to the mixing unit. Since the mixed gas of the air and the fuel gas is catalytically burned in the catalyst layer in the optimum state to release the hot air, the mixed gas of the air and the fuel gas is discharged by operating the air volume switching dial of the switch section arbitrarily. The amount of hot air can be freely adjusted according to the state of the object to be dried.

According to the catalytic combustion apparatus of the second aspect, in addition to the apparatus of the first aspect, a temperature sensor is provided in the catalyst layer of the combustion section, and the control section adjusts the flow rate by the detection signal of the temperature sensor. Since I am trying to output a control signal to the valve,
When you want to change the hot air volume by operating the air volume selector dial of the switch section in the same manner as above, even if there is an error in the operation of the flow rate adjustment valve and there is an abnormality in the combustion state in the catalyst layer. The temperature sensor provided in the catalyst layer detects this, and the detection signal is sent to the control unit to control the flow rate adjusting valve, so that the hot air amount can be adjusted more reliably.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a main body, which is made of a highly heat-resistant molding material and is formed in a pistol shape by including a cylindrical wind tunnel portion 11 and a grip portion 12 provided on a cylindrical side surface of a rear end portion of the wind tunnel portion 11, The following members are housed inside this.

Reference numeral 2 denotes a fuel portion, which comprises a gas tank 21, a nozzle 22, and a flow rate adjusting valve 23. The gas tank 21 stores a fuel gas such as liquefied petroleum gas, and is accommodated in the lower portion of the handle 12 by providing a replenishment port 21b for replenishing the fuel gas from the replenishment gas cylinder 21a. The nozzle 22 is connected to the gas tank 21 at its base end and extends to substantially the center of the wind tunnel 11, and injects fuel gas from its tip toward a mixing unit 6 described later. The flow rate adjusting valve 23 is composed of an electromagnetic valve or the like provided in the middle path of the nozzle 22, and adjusts the amount of fuel gas ejected from the tip of the nozzle 22 in accordance with a control signal from the control unit 4 described later.

Reference numeral 3 denotes a blower unit, which comprises a motor 31, a fan 32, and an air volume sensor 33. The motor 31 is driven by being supplied with power from the battery 34. Fan 32, motor 31
It is rotated by the drive of the suction port 32 provided at the rear end of the wind tunnel 11.
Air is sucked from a and is blown from the rear of the motor 31 toward a mixing section 6 described later. The air flow sensor 33 is a sensor that detects the air flow from the fan 32, that is, the wind speed, and is installed near the tip of the nozzle 22.

Reference numeral 4 denotes a control unit, which is formed to have an IC, a contact unit, etc., and which has the flow rate adjusting valve 23, the motor 31, and the air flow sensor described above.
33, the battery 34, and a switch unit 5, an ignition unit 7, and a temperature sensor 82, which will be described later, are connected to control the operation of each of these members, the details of which will be described later.

Reference numeral 5 denotes a switch section, which is an ON / OFF switch operated to turn on / off the power supply from the battery 34 and the motor 31.
And an air volume switching dial operated to change the amount of power supplied to the fan 32 to arbitrarily set the air volume of the fan 32.

Reference numeral 6 denotes a mixing portion, which has a cylindrical shape whose diameter is small at the opening and becomes larger toward the inner side, and a nozzle is formed substantially at the center of the opening.
The tip of 22 is positioned to inject the fuel gas toward the back,
Inside this, a mixed gas of fuel gas and air blown by the fan 32 is created.

Reference numeral 7 denotes an ignition portion, which is composed of a heater which is supplied with electricity from the battery 34 and which glows red, is arranged in the mixing portion 6 and ignites the mixed gas.

Reference numeral 8 is a combustion section, which comprises a catalyst layer 81 and a temperature sensor 82. The catalyst layer 81 is formed by supporting a catalyst such as platinum on a honeycomb type columnar ceramic body having a large number of ventilation holes, and one end face side of the column is located at the inner part of the mixing section 6, that is, the large diameter opening side. And is catalytically burned by the mixed gas sent from the mixing section 6. The temperature sensor 82 is arranged in the catalyst layer 81, and detects the temperature of hot air and sends the detection signal to the control unit 4.

Next, the operation of this catalytic combustion device will be described. First, when the ON / OFF switch of the switch unit 5 is turned ON, the flow control valve 23 is opened by the signal from the control unit 4 and the fuel gas from the gas tank 21 is ejected from the tip of the nozzle 22 into the mixing unit 6. At the same time, the ignition unit 7 is supplied with power to generate red heat and ignite the mixed gas of the fuel gas and the air in the mixing unit 6. After ignition, power supply to the ignition unit 7 is stopped, and after the time set by the control unit 4 so that the catalyst layer 81 is overheated by the combustion flame and becomes a temperature sufficient to start the catalyst combustion, the motor 31 is operated by the battery. Power is supplied from 34 via the control unit 4, the fan 32 starts rotating, and blows air toward the air volume sensor 33. The combustion flame is extinguished by this blowing, and the fuel gas ejected from the nozzle 22 and the blown air are mixed in the mixing section 6 to form a mixed gas, which is sent to the catalyst layer 81 and catalytic combustion of the catalyst layer 81. Is continuously discharged as hot air from the front opening 11a of the wind tunnel 11, and is used for drying hair, clothes or pet's body hair.

Here, when the object to be dried is, for example, well wetted, or in a state where it is desired to dry quickly, the air volume switching dial of the switch unit 5 is operated to an arbitrary stronger position. FIG. 2 shows the operation flow in this case. In the figure, by operating the air volume switching dial, the amount of power supplied to the motor 31 via the control unit 4 is increased, the rotational speed of the fan 32 is increased, and the air volume is increased. The air flow sensor 33 detects this and sends the detection signal to the control unit 4, and at the same time, the control unit 4 sends a control signal to the flow rate adjusting valve 23 to make the fuel gas amount corresponding to the air flow amount. The flow rate adjusting valve 23 operates based on the control signal to increase the amount of fuel gas ejected from the nozzle 22. In this way, the mixed gas of the air and the fuel gas sent to the mixing section 6 is catalytically burned in the catalyst layer 81 in the optimum state, and the hot air is emitted as a stronger air. On the other hand, when you want to weaken the hot air, the operation is the reverse of the above,
After all, it will be controlled to the optimum state.

Further, even if an error occurs in the operation of the flow rate adjusting valve 23 and the combustion state in the catalyst layer 81 is abnormal, the temperature sensor 82 provided in the catalyst layer 81 detects the temperature. The detection signal is sent to the control unit 4, and the flow rate adjusting valve 23 is also controlled so as to reach the optimum temperature.

[0021]

According to the catalytic combustion apparatus of the present invention, the fuel section is provided with a flow rate adjusting valve for adjusting the amount of fuel gas ejected from the nozzle, and the air blowing section is provided with an air volume sensor for directly detecting the air volume of the fan. Is designed to output a control signal to the flow rate adjusting valve based on the detection signal of the air volume sensor, even if the air volume of the air sent to the catalyst layer is changed, the fuel gas volume corresponding to the air volume is sent from the nozzle to the mixing section. Therefore, the mixed gas of these air and fuel gas will be catalytically burned in the optimum condition in the catalyst layer to release hot air, and therefore,
By arbitrarily operating the air volume switching dial of the switch section, the hot air volume can be freely adjusted according to the state of the object to be dried.

Further, a temperature sensor is provided in the catalyst layer of the combustion section, and the control section outputs a control signal to the flow rate adjusting valve according to the detection signal of this temperature sensor. At times, if an error occurs in the operation of the flow rate control valve and there is an abnormality in the combustion state in the catalyst layer, the temperature sensor arranged in the catalyst layer detects it,
Since the detection signal is sent to the control unit to control the flow rate adjusting valve, the amount of hot air can be adjusted more reliably.

[Brief description of drawings]

FIG. 1 is a sectional front view showing an embodiment of the present invention.

FIG. 2 is a diagram showing a flow of operations when the hot air flow rate is changed.

[Explanation of symbols]

 1 Main body 2 Fuel part 21 Gas tank 22 Nozzle 23 Flow rate adjusting valve 3 Blower part 31 Motor 32 Fan 33 Air volume sensor 4 Control part 5 Switch part 6 Mixing part 7 Ignition part 8 Combustion part 81 Catalyst layer 82 Temperature sensor

Claims (2)

[Claims] 1. A fuel unit comprising a gas tank for containing a fuel gas, a nozzle for ejecting the fuel gas from the gas tank, and a flow rate adjusting valve provided in the path of the nozzle, a motor, a fan rotated by the motor, and an air volume of the fan. An air blower composed of an air flow sensor for detecting, a control which outputs a control signal to the flow rate adjusting valve based on the detection signal of the air flow sensor, a switch operated to arbitrarily set the air flow of the fan, a fuel gas and air And a combustion section provided with a catalyst layer for catalytically burning the mixed gas sent from the mixing section, and a igniting section for igniting the mixed gas. apparatus. 2. The catalytic combustion according to claim 1, wherein the combustion section is provided with a temperature sensor, and the control section outputs a control signal to the flow rate adjusting valve according to a detection signal of the temperature sensor. apparatus.