JPS62147206A - Heater unit - Google Patents

Abstract

PURPOSE:To enable an efficient exothermic reaction and to get a high calorie and a hot heat with a small-sized unit by a method wherein oxidation catalyst carrier ceramics is sufficiently contacted with fuel and air. CONSTITUTION:An oxidation catalyst carrier ceramics 1 composed of porous structure is buried and held in a heat-resistant ceramic substrate having porous structure, its upper surface is exposed at an upper surface of the substrate 2 and at the same time installed in such a degree as aeration holes 3 are opened at the exposed surface. A fuel feeding hole 6 opened at the heat-resistant ceramic substrate is used for supplying oxidation reaction fuel gas to the oxidation catalyst carrier ceramics 1 and is arranged just below the ceramics 1. Its one end is opened at a lower surface of the heat-resistant ceramic substrate 2, and the other end is opened at a lower surface of the oxidation catalyst carrier ceramics 1 and communicated with the aeration hole 3 to form a vertical aeration passage. Fuel gas (indicated by an arrow A) fed through the feeding hole 6 fills a clearance 7 and then flows into a group of aeration holes 3 of the oxidation catalyst carrier ceramics 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heater for boiling and cooking, and more particularly to a power-free heater that utilizes the heat generated by a ceramic supporting an oxidation catalyst.

Prior art and its problems When a ceramic capable of supporting an oxidation catalyst is brought into contact with an organic volatile agent such as alcohol, heat is generated due to the oxidation reaction. Insect killers that use this oxidation catalyst-supported ceramics as a heat source for insecticidal mats are known, but in order to improve their performance, issues such as solving the lack of contact with the mixed gas of fuel and air and improving efficiency are issues. Furthermore, how to effectively utilize the calorific value of the oxidation catalyst-supported ceramic, which becomes red-hot, has become an issue, as well as improvements in the retention mechanism for the ceramic, the fuel supply mechanism for the ceramic, and the like.

On the other hand, conventional simple power-free heaters for cooking, such as simple stoves for meals at inns and warm-hearted appliances used for camping, etc., use alcohol-based solid fuels or hydrocarbon-based liquid fuels. is in practical use, but there are drawbacks in terms of safety and the inconvenience of having to use a ignition tool such as a matchstick.

OBJECTS OF THE INVENTION The present invention provides a heater that effectively utilizes the above-mentioned oxidation catalyst-supported ceramic as a heat source for boiling, etc.

Further, the present invention provides a heater that brings the oxidation catalyst-supported ceramic into sufficient contact with fuel and air to cause an efficient exothermic reaction, and therefore can be made compact and provide a large amount of heat and heat at a high temperature.

Furthermore, the present invention utilizes the amount of heat generated while effectively insulating the oxidation catalyst-supported ceramic ink, which becomes red hot at high temperatures, from other structural parts. Furthermore, the present invention provides a heater having a composite structure that properly holds the ceramic as a heating component, which is convenient for assembly and handling.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides the above-mentioned heater formed of a composite body of a heat-resistant ceramic base having a porous structure and a ceramic supporting an oxidation catalyst having a large number of ventilation holes. As described in the example, the oxidation catalyst-supporting ceramic is embedded and retained in the heat-resistant ceramic base having a porous structure and exposed to the - side of the base, and the heat-resistant ceramic base has a fuel inlet hole that reaches the oxidation catalyst-supporting ceramic. and open it on the bottom surface of the heat-resistant ceramic substrate.
The structure is such that fuel gas for oxidation reaction can be supplied from the lower opening of the fuel introduction hole to the oxidation catalyst-supporting ceramic ink.

In the above embodiment, the fuel inlet hole of the heat-resistant ceramic base is formed into a nozzle shape, and the tip of the nozzle that injects fuel into the nozzle-shaped hole faces the fuel injection nozzle and the inner wall of the hole around the nozzle. The structure is such that fuel can be effectively supplied while attracting air through the gap formed in a non-contact state.

In another embodiment, the above-mentioned heat-resistant ceramic is used as a hearth stand, and a seat for a cooking utensil device is provided thereon.

Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 3 show the basic structure of the heater.

In the figure, 1 indicates the oxidation catalyst-supported ceramic, and 2 indicates the porous structure 1711 thermoceramic substrate.

The heat-resistant catalyst-supported ceramic 1 has a porous structure similar to the heat-resistant ceramic base 2, and has a catalyst such as a platinum catalyst coated, impregnated, or mixed on the surface or inside of the structure, and has a rectangular parallelepiped or cylindrical shape as shown in the figure. exhibits an external shape such as a body,
It has a large number of through holes (ventilation holes) 3 that open at a pair of opposing holes.

1; The oxidation catalyst-supported ceramic 1 is embedded and held in the heat-resistant ceramic base 2 having a porous structure, and the top surface of the oxidation catalyst-supported ceramic 1 is exposed on the top surface of the heat-resistant ceramic base 2. At the same time, the ventilation holes 3 are installed so as to open on the exposed surface. In other words, the ventilation structure will be in the direction of the earthworks.

Preferably, as shown in the figure, the oxidation catalyst-supporting ceramic 1 is held so that its upper end protrudes toward the surface of the heat-resistant ceramic base 2. 1a indicates the protrusion. In order to hold the oxidation catalyst-supported ceramic l, a ceramic holding hole 4 opened in the L plane is opened in the center of the #thermal ceramic substrate 2,
In order to set the embedding depth, a stepped portion 5 is formed at the bottom of the ceramic holding hole 4, and the oxidation catalyst-supported ceramic l is fitted into the holding hole 4, and the skin of the oxidation catalyst-supported ceramic l is connected to the +W
The structure is such that the skin of the n-thermal ceramic base a2 comes into direct contact within the holding hole, or as a second-best measure, a heat-resistant adhesive is attached to the extreme parts to strengthen the fixation.

Furthermore, a fuel introduction hole 6 is opened in the heat-resistant ceramic base. The fuel introduction hole 6 is for supplying fuel gas for the oxidation reaction to the oxidation catalyst-supporting ceramic 1, and is arranged directly below the ceramic 1, with one end opening at the lower surface of the heat-resistant ceramic base 2, and the other end opening at the lower surface of the heat-resistant ceramic base 2. The end opens at the lower part of the oxidation catalyst-supported ceramic 1, and communicates with the ventilation hole 3 to form a vertical ventilation path.

The fuel introduction hole 6 has a nozzle shape or the like, with its enlarged opening opening at the lower surface of the heat-resistant ceramic substrate 2, and its narrow opening opening toward the center of the lower surface of the oxidation catalyst-supporting ceramic l.

Also, a gap 7 is formed on the lower surface of the oxidation catalyst-supporting ceramic l in contact with the opening area of the vent hole 3 and communicating with the upper opening of the fuel introduction hole 6. In other words, the gap 7 is connected to the bottom of the ceramic holding hole 4, the fuel introduction hole 6 is opened at the center of the gap 7, and the fuel gas (arrow A) introduced from the introduction hole 6 flows into the gap 7. The gap 7 is filled with oxidation catalyst-supported ceramic l.
The structure is such that the air flows into three groups of ventilation holes.

FIG. 4 and FIG. 5 disclose the present invention with an embodiment in which a heater for boiling and cooking utensils is constructed using the above-mentioned heater as a main component.

In this embodiment, the heat-resistant ceramic base 2 described above is used as a furnace stand, and a nozzle 8 for ejecting fuel gas is installed in the lower opening of the fuel introduction hole 6 opened in the base 2, which is the furnace stand. The nozzle 8 is arranged in a non-contact state with the inner wall of the fuel introduction hole 6, and an annular gap 9 is formed around the nozzle 8. The fuel gas is ejected from the nozzle 8 through the fuel introduction hole 6 toward the fermentation catalyst-supporting ceramic 1, and the ejection of the fuel gas attracts air through the annular gap 9 to form a mixed gas, which flows into the upper part of the nozzle-shaped fuel introduction hole 6. It is discharged from the narrow opening toward the center of the oxidation catalyst-supporting ceramic.

A pressure fuel container 10 is provided for ejecting fuel gas from the fuel ejection nozzle 8. As shown in FIG.
The pressure fuel container 10 is housed in the fuel tank 1 and connected to the nozzle 8. At the connection part of the nozzle 8, there is provided an operating rod 12 which is externally operated to open/close and adjust the nozzle. Also, the nozzle 8 is the base 1
A pedestal 13 on which a heat-resistant ceramic substrate a2 is placed is mounted with a nut 14, and the relative position of the nozzle 8 with respect to the fuel introduction hole 6 is fixed.

Further, the pressure fuel container 1O is of a fuel supply type, with its fuel supply port 15 projecting to the outside, and is configured to receive supply from other pressure fuel cylinders as necessary. The supply o
No. 15 can be applied with the same injection valve structure as for refueling a lighter. Furthermore, since the water heater can use the same butane as the lighter, a commercially available lighter fuel cylinder can be used.

Further, a cooking utensil mounting seat 16 is installed close to the heat-resistant ceramic base B2 serving as the hearth stand. The cooking utensil a and the seat 16 are fitted onto the heat-resistant ceramic base 2 through their cylindrical mounting portions 17, and an annular pedestal 1 having an outwardly flange shape is attached to the upper end of the cylindrical mounting portion 17.
8, and a trivet 19 is provided on the pedestal 18 so that it can be rotated inward and outward with a shaft 20, and the trivet 19 is arranged to surround the heat-resistant ceramic base @2 with the oxidation catalyst supporting ceramic l as the center. The boiling pots are arranged at intervals, and when in use, are expanded toward the outer diameter side to support the boiling pot on top of the oxidation catalyst-supporting ceramic l. The trivet 19 can also be implemented as a fixed type.

By operating the operating rod 12, the fuel in the pressure fuel container 10 is ejected from the nozzle 8 into the fuel introduction hole 6 of the heat-resistant ceramic base 2, and becomes a mixed gas while attracting air from the surroundings. The air is discharged at a predetermined flow rate from 1 to the oxidation catalyst-supporting ceramic l at a predetermined flow rate.In order to take in the air, an outside air introduction hole 21 communicating with the installation space of the nozzle 8 is provided in the leg 11 and the pedestal 13. , allowing free ventilation from the envelope to the fuel introduction hole 6.

If the fuel introduction hole 6 is a nozzle-shaped hole, the flow rate of the mixed gas can be increased, and the mixed gas can be ejected to the lower surface of the oxidation catalyst-supporting ceramic l and flowed into the vent hole 3. Also, due to the existence of the gap 7, pressurized gas (mixed gas) fills the gap 7 and flows into each vent hole 3 at an accelerated rate. The accelerated inflow of the gas, that is, the pressurized jetting of the fuel gas, quickly pushes the burned gas in the vent hole 3 upward from the upper opening, creating a state in which the opportunity for contact with the fuel gas is constantly activated. do. Furthermore, a sufficient amount of fuel necessary for the oxidation reaction is injected without causing stagnation or fuel shortage. As a result, the oxidation catalyst-supported ceramic reacts extremely efficiently and violently, becoming red-hot at a high temperature that reaches the limit of its heat-generating capacity, and the unreacted gas that comes into contact with the red heat combusts on its own, forming a small flame, which catalyzes the oxidation catalyst. Flames appear on the supported ceramic.

Therefore, no unreacted gas is released as raw gas. As a result, even a small ceramic can provide a high temperature and a large amount of heat, allowing cooking utensils to be heated in a short time.

As described in detail, the present invention comprises a heater made of a composite of an oxidation catalyst-supported ceramic having a large number of vents and a heat-resistant ceramic base having a porous structure. The oxidation catalyst-supported ceramic 7 was embedded and held in the heat-resistant ceramic base having a porous structure so that the ventilation holes were facing downwards, exposing the base to the ab-ab surface, and writing on the heat-resistant ceramic base. A fuel introduction hole leading to the oxidation catalyst-supporting ceramic is opened to the vent opening area on the lower surface of the heat-resistant ceramic substrate, and fuel gas for the oxidation reaction is supplied from the lower opening of the fuel introduction hole to the oxidation catalyst-supporting ceramic. Therefore, it is possible to provide a heater that is appropriately equipped with the function of holding the oxidation catalyst-supporting ceramic serving as the heating element and the function of supplying fuel gas to the ceramic.

That is, the fuel gas is well captured in the fuel inlet hole, and the fuel and air are reliably and sufficiently supplied to the oxidation catalyst-supporting ceramic embedded and held in the upper end of the inlet hole, and the liquid is passed into the vent hole.
It is possible to make the contact more active and bring about an efficient exothermic reaction. Therefore, it is possible to obtain a large amount of heat and high temperature heat with a small size. Properly use ceramics supporting oxidation catalysts, which can be thermally insulated effectively from the structure, effectively utilize the generated heat to the object to be heated, and are convenient and safe to assemble and handle as heating parts. It is possible to provide a heater with a composite structure for holding.

In addition, by installing the fuel gas injection nozzle in the lower opening of the fuel introduction hole of the heat-resistant ceramic base so as to face the hole wall without contacting it, air is drawn from the gap around the nozzle and the oxidation catalyst is supported along with the fuel gas. It is possible to actively accelerate the flow into the ceramic at a predetermined flow rate, and in combination with this and the upward airflow accompanying the oxidation exothermic reaction inside the vent,
While quickly exhausting the air inside the vent hole, new fuel gas can always be introduced into the vent hole, and the activation and efficiency of the oxidation reaction can be further promoted.

In addition, by making the fuel introduction hole into a nozzle shape, it is possible to further accelerate the inflow of fuel gas and air into the vent hole of the oxidation catalyst-supported ceramic, and furthermore, it is possible to further promote the accelerated inflow of fuel gas and air into the vent hole of the oxidation catalyst-supported ceramic. By forming a gap that connects and communicates with the fuel gas introduction hole, the fuel gas and air that fill the gap can be uniformly introduced into each vent hole without escaping to other places, and can be used in conjunction with a fuel injection nozzle. This allows accelerated flow of pressurized gas to occur equally in each vent hole, thereby promoting the oxidative exothermic reaction.

Furthermore, a heater for boiling and cooking can be provided with a simple structure in which a heat-resistant ceramic base holding the oxidation catalyst-supported ceramic shown in L is used as a furnace stand, and a cooking-tool mounting seat is provided on this, and the oxidation catalyst-supported ceramic and the heat-resistant ceramic can be provided. Even when using a small oxidation catalyst-supported ceramic composite with a base, high
It is possible to obtain clear heat and perform quick heating.

The uninvented invention can be suitably used as a heater for simple cooking stoves in hotels that conventionally relied on hydrocarbon fuels, or water heaters for camping, and is safe and does not require a igniter. It is possible to provide a heater that is easy to handle, and it is highly anticipated that it will be put into practical use as a convenient and simple heater for boiling.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a heater showing an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a bottom view of the same, and Fig. 4 is a boiling heater in which the heater is installed. FIG. 5 is a plan view of the same. l...Oxidation catalyst supporting ceramic, 2...Heat-resistant ceramic base, 3...Vent hole, 6...Fuel gas introduction hole,
7... Gap, 8... Fuel injection nozzle, 10... Pressure fuel container, 16... Cooking utensil mounting seat. '((4, :, ^ Figure 1 Figure 2

Claims (5)

[Claims] (1) An oxidation catalyst-supporting ceramic having a large number of ventilation holes serving as a heat source is buried and held in a heat-resistant ceramic substrate having a porous structure so that the ventilation holes are vertically oriented and exposed on the top surface of the ceramic substrate, and the heat-resistant ceramic A fuel introduction hole that communicates with the vent opening area on the lower surface of the oxidation catalyst-supporting ceramic is opened in the base, and is opened on the lower surface of the heat-resistant ceramic base, and a fuel for oxidation reaction is directed from the lower opening of the fuel introduction hole to the oxidation catalyst-supported ceramic. A heater characterized in that it is configured to supply fuel gas. (2) The invention as set forth in claim 1, wherein the fuel introduction hole is shaped like a nozzle. (3) The upper opening of the fuel introduction hole is opened toward the center of the lower surface of the oxidation catalyst-supported ceramic, and a gap is formed in the lower surface of the oxidation catalyst-supported ceramic to communicate with the upper opening of the fuel introduction hole. The invention according to claim 1, which is (4) The invention as set forth in claim 1, wherein the nozzle tip of the pressure fuel container is disposed within the lower opening of the fuel gas introduction hole without contacting the inner wall of the fuel gas introduction hole. (5) The invention according to claim 1, wherein the heat-resistant ceramic base is used as a hearth stand, and the hearth stand is provided with a cooking utensil mounting seat for supporting a cooking utensil above the oxidation catalyst-supporting ceramic.