JPH02159203A - Catalyzer combustion apparatus - Google Patents

Abstract

PURPOSE:To discharge much gas at the time of initial rise and discharge an only a gas quantity necessary for keeping a constant temperature after temperature rise by a method wherein gas gasified by a carburetor is throttled with a nozzle to jet the gas at a high speed, wherein the gas is mixed with air, wherein an injector section for feeding the gas to a catalyzer is set to burn the catalyzer, and wherein the interior of a tank is composed of thermal insulation materials. CONSTITUTION:By a resistor 31, the current of gas is limited, and the gas is jetted at a high speed from a jet port 34 at the tip of a nozzle 33, and ambient air is sucked up by an injector section 35, and the mixture of proper gas and air is made and is fed to a catalyzer 40. The catalyzer is fired by a firing device 41, and catalyzer combustion is started. A tank 39 forms a thermal insulation structure as a whole by jointing the thermal insulation materials 38 to the internal surface of the tank. When gas is started to come out, then by the vapor heat of the gas, the temperature of liquefied gas in the tank is lowered, and so in an initial state, a temperature in the tank is equal to a room temperature, and tank internal-pressure is high, and so an initial gas flow rate is high, but by the vapor heat of the gas, the temperature in the tank is lowered, and accordingly, the internal pressure is lowered, and a gas flow rate is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a catalytic combustion device for general household use using liquefied petroleum gas.

Prior Art Conventionally, this type of catalytic combustion apparatus has had a structure as shown in FIG. 3.4. Figures 3 and 4 show examples of hair curlers, and 1 is a resistor which functions to suppress the amount of liquefied gas flowing out under the pressure of a tank 2 to a constant amount. The liquefied gas, which is held in a certain amount, receives heat from its surroundings and vaporizes. That is, this resistor 1 is the liquefied gas vaporization device itself. The vaporized gas passes through the valve part 3 and nozzle 4 and has a thickness of approximately e○μm.
The small holes 5 of the injector also eject air, and air is drawn in from the surrounding area through the holes 10 of a part of the injector and supplied to the catalyst 8.

6 and 7 are two pipes with different coefficients of thermal expansion, and receive the combustion heat of the catalyst 8 installed on the outside of these pipes. The combustion temperature is controlled by opening and closing.

9 is a lamp wick, and 11 is an ignition device. The reason why a control mechanism is used in this type of combustion device is to heat the heating part as quickly as possible and keep it at a constant temperature. When this happens, a control is performed to reduce the amount of gas.

Problems to be Solved by the Invention Conventional configurations require a complicated mechanism for temperature control, but from a practical perspective, a high-voltage gas is emitted at startup, and when the temperature approaches the saturation temperature, the saturation temperature is lowered. If there is a mechanism that outputs the amount of gas in two stages to output the amount of gas necessary to maintain the temperature, it will be possible to replace the conventional temperature control mechanism.

The present invention provides a catalytic combustion device that has a gas supply device that releases a large amount of gas during initial start-up and only releases the amount of gas necessary to maintain a constant temperature after temperature rise. .

Means for Solving the Problems The combustion device of the present invention comprises a tank section for storing liquefied petroleum gas, a vaporizer for vaporizing the liquefied petroleum gas by limiting the flow rate of the liquefied petroleum gas, and a nozzle for squeezing the gas vaporized by the vaporizer. The fuel tank is configured to include an injector section that ejects the fuel at high speed, mixes it with air, and supplies the mixture to the catalyst for catalytic combustion, and the interior of the tank is constructed of a heat insulating material.

Effects According to this configuration, when the switch is turned on and gas starts to flow out, the temperature of the liquefied gas in the tank decreases due to the heat of evaporation of the gas, so that in the initial state, the temperature inside the tank is equal to room temperature. Since the tank internal pressure is high, the initial gas flow rate is high, but the temperature inside the tank decreases due to the heat of evaporation of the gas, which causes the internal pressure to decrease and the gas flow rate to decrease.

EXAMPLES The following examples will be described with reference to FIGS. 1 and 2.

In the figure, 31 is a resistor that restricts the flow of gas. 32 is a valve portion, 33 is a nozzle, and gas is ejected at a higher speed than a jet port 34 at the tip of this nozzle 33. The ejected gas is injected with surrounding air by the injector section 36 to create an appropriate mixture of gas and air, which is then supplied to the catalyst 4o. Then, it is ignited by the ignition device 41, and catalytic combustion starts. In addition, the liquefied fuel 37 is connected to the resistor 31 via the lamp wick 36.
The tank 39 for supplying the water has a heat insulating structure as a whole by bonding a heat insulating material 38 to its inner surface. Incidentally, the flow rate of gas coming out of the nozzle 33 is proportional to the internal pressure of the tank 39. The internal pressure of the tank 39 is proportional to the temperature of the liquefied petroleum gas within the tank. Now, the latent heat of vaporization of isobutane is 91.6i
CILl/f, specific heat is 0.229 tml/f
It is ℃. If 0.51 of the gas evaporates in the initial stage,
If 6 g of gas remains in the tank 39 and half of the latent heat of vaporization is used to cool the gas, it is calculated that the temperature will decrease by about 20°C. In that case, if the initial pressure is 20℃, which is the same as room temperature, the pressure will be O'C, and the internal pressure will be 2.2 kg/cg in gauge pressure → o, e kg/an-, which will decrease to 1/3.7. .

Therefore, the gas flow rate is also reduced to 1/3.7.

In reality, as the temperature decreases, the flow rate decreases and the heat of vaporization decreases, so the decrease is not as rapid as this, and the difference in flow rate between the initial stage and the saturated stage is only about the same.

This also changes depending on the state of insulation of the tank 39.

By insulating the gas storage tank 39 in this manner, it is possible to obtain a structure in which the gas flow rate is increased during initial temperature rise and decreased during saturation by utilizing the latent heat of vaporization of the gas.

Effects of the Invention As described above, the present invention has an insulated structure for the tank, which allows a large amount of gas to flow at the beginning, so that when the temperature rises rapidly and approaches saturation, an appropriate gas flow rate can be obtained. become. With this device, a complicated mechanism for controlling gas flow rate based on temperature is no longer necessary, and a simple catalytic combustion device can be obtained.

In addition, in the above-mentioned embodiment, an example was described in which a member (for example, foamed plastic, etc.) for obtaining heat insulation properties was bonded to the inner surface of the tank, but it is also possible to construct the tank itself from a heat insulation material.

[Brief explanation of the drawing]

Fig. 1 is an enlarged sectional view of the main parts of a catalytic combustion device showing an embodiment of the present invention, Fig. 2 is an overall sectional view, Fig. 3 is a sectional view of a conventional catalytic combustion type curler, and Fig. 4 is a sectional view of a conventional catalytic combustion type curler. This is an enlarged cross-sectional view of the main parts of Figure 3. 31... Vaporization device (resistor), 33...
・Nozzle, 35...Injector lid part, 39・
·····tank. Name of agent: Patent attorney Shigetaka Awano and one other person

Claims (1)

[Claims] a vaporizer that limits the flow rate of liquefied petroleum gas and vaporizes it;
The gas vaporizer is equipped with an injector section that squeezes the vaporized gas through a nozzle to eject it at high speed, mixes it with air, and supplies it to the catalyst. Device.