JPH065524Y2 - Refractory molding for heat radiation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a refractory molded article for heat radiation used in a heater, a dryer, a heater, and the like.

[Conventional technology]

Many attempts have been made to use radiant heat from a radiation plate in addition to radiant heat from a heat source for heaters, dryers, heaters, etc. that use gas, oil, electricity, etc. as heat sources. The structure of this radiation plate is an important technical issue, and development of a radiation plate with good radiation efficiency has been awaited.

However, the development of radiation plates made of refractory materials has not progressed so much, and studies have been made exclusively on metals (particularly stainless steel).

[Problems to be solved by the device]

For example, a petroleum hot-air heater uses a high-performance gasification burner that gasifies and burns white kerosene, and the combustion gas energy heats the indoor air by a heat exchanger and blows it indoors. It is for heating. However, the conventional oil hot air heater does not use infrared energy such as an oil stove, and an improved type using a heat radiation plate is desired.

The present invention is a heater, a dryer, and a heater that uniformly generate infrared radiation by applying the flame of a gasification burner, the flame of city gas, propane gas, and the radiant heat of an electric heater to the heat radiating plate once to make it red heat. An object of the present invention is to provide a refractory material for heat radiation used in machines and the like.

[Means for Solving the Problems]

The heat radiation refractory molded body according to the present invention is made of ceramics, ceramic fiber material, or ceramic fiber and refractory powder composite as a molding material, and a mushroom consisting of a core portion and an umbrella body portion on the upper surface of a flat base. The mold protrusions are arranged in a staggered arrangement, and the surface of the heat radiation plate on which the protrusions are formed is erected parallel to or inclined to the burner flame.

The mushroom-shaped projections on the heat radiation plate are arranged in a staggered arrangement on the substrate, but their pitch, size of the umbrella, thickness and length of the core play an important role in making the heat radiation plate red heat. To fulfill. In order to efficiently turn the heat radiation plate into red heat, the area of the umbrella portion is 35 to 60%, preferably 38 to 55% of the area of the base. Although the thickness of the core portion needs to take strength into consideration, it is preferably cylindrical or prismatic, and its cross-sectional area is preferably 25 to 40% of the area of the umbrella portion. A core length of 5 to 10 mm and an umbrella thickness of 1 to 3 mm are suitable. 1 mm
If it is less than 3 mm, the strength is weak.

The shape of the umbrella portion of the heat radiation plate may be circular, polygonal, star-shaped, snowflake-shaped, flower-shaped such as cherry blossoms, cosmos, or the like.

The protrusions on the heat radiation plate are formed in a staggered arrangement on the substrate, but when the heat radiation plate is arranged on the burner, the protrusions are arranged alternately in the rising direction of the flame gas, and the flame gas is turbulent. It is recommended to stand upright.

[Action]

In the heat radiation plate according to the present invention, the flame gas generated from the burner rises along the surface on which the protrusion is provided, so that the mushroom-shaped protrusion on the side surface first becomes red heat, and then the base portion becomes red heat state. Is.

In addition, by forming a window on the side of the heater so that the heat radiation plate can be observed, the combustion state of the burner can be observed well, and infrared radiation through the window can also be obtained.
It can heat efficiently.

〔Example〕

FIG. 1 is a front view of the mushroom type heat radiation plate of the present invention, and FIG.
Fig. 3 is a sectional view taken along the line A-A in Fig. 3, Fig. 3 is a side view showing the arrangement of the heat radiation plate and the burner of the present invention, and Fig. 4 is a front view showing the arrangement of the heat radiation plate and the burner of the present invention. Is.

Reference numeral 1 is a base, 2 is a core portion, 3 is an umbrella body portion, 4 is a burner, and 5 is a flame.

The method for molding the ceramic heat radiation plate of the present invention is to knead cordierite, chamotte, etc. into the ceramic fiber and harden it with alumina cement (hereinafter referred to as cement bonding method), or to the ceramic fiber bulk with inorganic bonding. Agent, for example, aluminum phosphate, and curing by vacuum pressing (hereinafter referred to as vacuum forming method). Furthermore, an inorganic sintering agent and an organic thickening binder are added to ceramic fiber bulk and cordierite or chamotte powder. There is a method (hereinafter, referred to as a papermaking method) for curing by curing.

To mold the heat radiation plate shown in FIGS. 1 and 2,
In the case of the cement bonding method, a mold of a mushroom-shaped heat radiation plate is made of plastic or the like, the material is cast and molded, and then fired to eliminate and remove the mold. Also, by making a mold for a mushroom-shaped heat radiation plate using gypsum, etc., and then casting and molding the above molding material, firing, and making it by cleaning and removing the mold that contracted and became brittle. Good. When using a ceramic fiber bulk for the vacuum method and the papermaking method, first, the base 1 and the core 2 are integrally molded, and the separately molded umbrella body 3 is dried and then bonded with a heat resistant adhesive. Then, they may be integrated and fired at the end.

The heat radiation plate molded in this way is shown in FIG.
As shown in the figure, along the direction of the flame 5 of the burner surface (for example, 250 × 40 mm) in the oil warm air heater, it is erected on the burner combustion surface, as shown in FIG. Since the mushroom-shaped projection forming surface of the heat radiation plate faces the flame 5 and is arranged so as to be inclined on the flame 5 by the width of the burner 4, the flame gas efficiently rises along the heat radiation plate surface, In addition, the mushroom-shaped projections are brought into a turbulent state, and the mushroom-shaped projections can be red-heated.

The bottom of the heat radiation plate is easy to heat because it is close to the flame,
The flow of flame gas from the lower part of the heat radiating plate also flows along the heat radiating plate to the upper part of the middle and upper parts of the heat radiating plate, and the entire heat radiating plate is efficiently reddened.

[Effect of device]

By arranging the heat radiation plate on the burner in the oil warm air heater, in addition to heating by warm air, it is possible to obtain the heating effect by the infrared radiation generated from the heat radiation plate and the red heat state of the heat radiation plate. The combustion state of the burner can be confirmed by observing from the outside, and the burner can be made safe. The heat radiation refractory molding of the present invention has a structure in which a large number of mushroom-shaped projections are provided on a base, and the burner flames are arranged so that the surfaces provided with the projections face each other and are parallel or inclined to the flame direction. By erected on the top, it is possible to efficiently turn the protrusion and then the base into red heat.

The present invention has been described above by taking a burner as an example. However, the present invention is not applicable only to a burner, and a dryer in which a nichrome wire is arranged in front of the radiation plate or a ceramic heater such as a silicon carbide heating element is installed for heating. It should be understood that it can be naturally applied to machines and the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a mushroom type heat radiation plate of the present invention, and FIG. 2 is a first view.
Fig. 3 is a sectional view taken along the line A-A in Fig. 3, Fig. 3 is a side view showing the arrangement of the heat radiation plate and the burner of the present invention, and Fig. 4 is a front view showing the arrangement of the heat radiation plate and the burner of the present invention. Is. Reference numeral 1 is a base, 2 is a core portion, 3 is an umbrella body portion, 4 is a burner, and 5 is a flame.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Takenaka 477-23 Hattori, Nagafune-cho, Oku-gun, Okayama Prefecture (72) Inventor Shunsuke Shirahige 1490 Tsuruumi, Bizen City, Okayama Reference (56) Reference JP-A-58-62437 (JP) , A) Jitsuko Sho 43-16366 (JP, Y1)

Claims (2)

[Scope of utility model registration request] Claims: 1. A mushroom-shaped projection comprising a core and an umbrella body is projected on a flat plate-like base in a zigzag arrangement, and the projection forming surface is parallel or inclined to the burner flame. Refractory molding for heat radiation standing on the surface. 2. A heat radiation refractory molded body is made of ceramics,
2. A refractory molded article for heat radiation according to claim 1, which is a ceramic fiber material or a ceramic fiber and refractory powder composite.