JP7829217B2 - Water evaporation suppression plate for roasters - Google Patents

Description

This invention relates to a water evaporation suppression plate for a roaster, which has water stored in the lower part of a box containing a burner, and which can suppress the external discharge of evaporated stored water.

Traditionally, grills used for yakiniku (Japanese barbecue) and similar dishes have been designed to prevent overheating of the burner chamber by storing water at the bottom of the chamber, and to prevent meat juices and residue from burning onto the inside of the chamber.

For example, there is a roaster in which an opening is formed in the center of the bottom of the box, a rising wall is formed along the opening, a drain pan is formed between the rising wall at the bottom of the box and the periphery wall of the box, water is stored in the drain pan, a burner is housed inside the rising wall, a step for placing cooking means such as a grill or grate is formed at the upper end of the box, and a radiant plate is positioned directly above the burner. This roaster prevents grease and burnt residue from meat juices from adhering to the inner periphery of the box, making it less likely for dirt to bake on, thus reducing the labor required for cleaning (see, for example, Patent Document 1).

Japanese Patent Publication No. 2000-254008

However, in the conventional technology described above, the water in the drain pan at the bottom of the box is heated and evaporated by the radiant heat of the burner. However, all of this steam passes through the cooking device and is discharged externally, resulting in the need for frequent water replenishment, among other problems that needed to be addressed.

In view of the problem of water evaporating from the bottom of the box and being discharged to the outside, as described above in the prior art, the present invention provides a roaster in which an opening is formed in the center of the bottom of the box, a rising wall is formed along the opening, a drain pan is formed between the rising wall at the bottom of the box and the peripheral wall of the box, water is stored in the drain pan, a burner is housed inside the rising wall, and a radiant plate is placed directly above the burner, and the roaster has an inclined plate portion that covers the top of the drain pan, and a retaining plate portion that protrudes outward from the upper end of the inclined plate portion and attaches to the upper end of the box, and the inclined plate portion is fitted into the upper opening of the box, thereby trapping water vapor in a space formed above the water surface, bringing it into contact with the inner surface of the low-temperature peripheral wall of the box, causing condensation and the formation of water droplets, which flow down the inner surface and return to the original state, thereby reducing the frequency of water replenishment or reducing the amount of water replenished even if the frequency of replenishment is the same, and thus solving the above problem.

In short, the invention described in claim 1 is a roaster in which an opening is formed in the center of the bottom of a box-shaped body, a rising wall is formed along the opening, a drain pan is formed between the rising wall at the bottom of the box-shaped body and the peripheral wall of the box-shaped body, water is stored in the drain pan, a burner is housed inside the rising wall, and a radiant plate is placed directly above the burner. The roaster has an inclined plate portion that covers the top of the drain pan, and a retaining plate portion that protrudes outward from the upper end of the inclined plate portion and attaches to the upper end of the box-shaped body. Because the inclined plate portion is inclined inward and downward, even if water evaporates from the drain pan, most of it returns to the drain pan, meaning that most of the water vapor can be recovered and reused. This reduces the frequency of water replenishment, or even if the frequency of replenishment remains the same, the amount of water replenished can be reduced, thus reducing the burden on the operator.

The invention described in claim 2 allows the box to be housed in a container with air in contact with its outer surface. This ensures that the outer wall of the box is kept at a low temperature, allowing water vapor in the space below the inclined plate to condense into droplets upon contact with the low-temperature inner wall, flow down, and be reliably returned to the drain pan.

The invention described in claim 3 is such that, because the inclination of the inclined plate gradually increases downwards, a wide space can be secured below the inclined plate. This increases the residence time of water vapor in this lower space, making it easier for water vapor to condense into water droplets.

The invention described in claim 4 allows the radiant plate to be positioned above the inclined plate portion. Therefore, the lower opening of the water evaporation suppression plate becomes narrower than that of the radiant plate, allowing most of the generated water vapor to fill the space between the box and the inclined plate portion.

The invention described in claim 5 allows the radiant plate to be placed on the inclined plate portion. Therefore, the water evaporation suppression plate according to the present invention can also be used as a means for installing the radiant plate, eliminating the need for a separate component for mounting the radiant plate.

The invention described in claim 6 is such that, since the lower end of the inclined plate portion is set below the flame port of the burner, in the case of a burner with multiple flame ports arranged around the outer circumference of the tip, if there were no inclined plate portion, the water in the drain pan would be directly heated by the flame from the flame ports. However, because there is an inclined plate portion that covers the top of the drain pan, the flame from the flame ports does not reach the water in the drain pan, and the rise in water temperature can be suppressed.

This is a schematic cross-sectional view of a smokeless roaster equipped with a water evaporation suppression plate for roasters according to the present invention. This is a perspective view of the circular type of water evaporation suppression plate for a roaster according to the present invention. This is a perspective view of the square-type water evaporation suppression plate for a roaster according to the present invention. This is a perspective view of the rectangular type of water evaporation suppression plate for a roaster according to the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Figure 1 is a schematic cross-sectional view of a roaster equipped with a water evaporation suppression plate according to the present invention. Similar to the prior art, this roaster 1 has an opening 3 formed in the center of the bottom of the box body 2, and a rising wall 4 formed along the opening 3. A drain pan 5 is formed between the rising wall 4 at the bottom of the box body 2 and the peripheral wall of the box body 2, and water W is stored in the drain pan 5. A burner 6 is housed inside the rising wall 4, a mounting step 8 for a mounted cooking means 7 is formed at the upper end of the box body 2, and a radiant plate 9 is positioned directly above the burner 6.
Furthermore, the burner 6 has multiple flame ports 14 around its outer edge, and these flame ports 14 are positioned above the upper end of the rising wall 4 so that the flame is radiated towards the drain pan 5.

The water evaporation suppression plate 10 according to the present invention is fitted into the upper opening of the box body 2 to cover the top of the drain pan 5. It basically has an inclined plate portion 11 that is formed along the opening 3 at the bottom of the box body 2 and slopes inward and downward, and a hooking plate portion 12 that protrudes outward from the upper end of the inclined plate portion 11 to the mounting step portion 8 of the box body 2. Furthermore, in a plan view, the portion of the rising wall 4 that protrudes from the water surface of the water W is positioned within the lower opening of the water evaporation suppression plate 10, and it is preferable to narrow the gap between the lower end of the inclined plate portion 11 and the rising wall 4.

Specifically, in the case of a cylindrical burner, the drain pan 5 is formed in a ring shape by forming an opening 3 in the center of the bottom of the box body 2. In the case of a bottomed cylindrical box body 2, a water evaporation suppression plate is used, as shown in Figure 2, in which the upper and lower openings are circular and gradually decrease in diameter downwards, and the slope in the upper part gradually increases downwards while the lower part remains constant, for example, a trumpet-shaped inclined plate portion 11 with a latching plate portion 12 around its upper end. In the case of a bottomed rectangular tubular box body 2, as shown in Figure 3, the upper and lower openings are square and the slope in the upper part gradually increases downwards while the lower part remains constant, for example, an inverted truncated square pyramidal inclined plate portion 11 When a water evaporation suppression plate with a retaining plate portion 12 is used around its end, and the burner 6 is a rod-shaped burner, a slit-shaped opening 3 is formed in the center of the bottom of the box body 2, extending along its entire length. Since the drain pan 5 is formed by dividing it on both sides of the opening 3, a water evaporation suppression plate is used, as shown in Figure 4, with a rectangular shape for the upper and lower openings and a pair of opposing inclined plate portions 11, 11, and retaining plate portions 12, 12 projecting outward from the upper ends of the inclined plate portions 11, 11. The slope of the inclined plate portions 11, 11 gradually increases downwards, while the slope remains constant in the lower portion. The pair of inclined plate portions 11, 11 are integrated by connecting plates 13, 13.

Furthermore, although the material of the water evaporation suppression plate 10 is not specifically mentioned in the above embodiment, any non-combustible material with fire resistance and heat resistance that prevents thermal deformation may be used. For example, metal or aluminum foil, which is convenient for disposability, may be used.

Furthermore, although the inclined plate section 11 is shown as a flat plate in the drawing, it may also be a corrugated plate with continuous valleys and peaks in the lateral direction, although this is not shown in the drawing.

Furthermore, in the drawing, it is preferable that the slope of the inclined plate section 11 gradually increases downwards from the upper section, and remains constant in the lower section; however, it may also be constant throughout.

As shown in Figure 1, since the drain pan 5 is covered by the inclined plate section 11, the air in the space below the inclined plate section 11 within the box body 2 rises within that space and then convects in a downward airflow along the inner surface of the box body 2. In the process, it comes into contact with the inner surface of the low-temperature sidewall of the box body 2, causing condensation and forming water droplets. These water droplets then flow down the inner surface and return to the drain pan 5.

1. Roaster 2. Box 3. Opening 4. Rising wall 5. Drain pan 6. Burner 7. Cooking device 9. Radiant plate
10 Water evaporation suppression plate
11 Inclined plate part
12 Latch plate part
14 Flame mouth W water

Claims (6)

A water evaporation suppression plate for use in a roaster, wherein an opening is formed in the center of the bottom of the box-shaped body, and a rising wall is formed along the opening, a drain pan is formed between the rising wall at the bottom of the box-shaped body and the peripheral wall of the box-shaped body, water is stored in the drain pan, a burner is housed inside the rising wall, and a radiant plate is placed directly above the burner,
A water evaporation suppression plate for a roaster, characterized by having an inclined plate portion that covers the top of the drain pan, and a hooking plate portion that protrudes outward from the upper end of the inclined plate portion and attaches to the upper end of the box body, wherein the inclined plate portion is inclined inward and downward. A water evaporation suppression plate for a roaster according to claim 1,
A water evaporation suppression plate for a roaster, characterized in that it is housed in the aforementioned box-shaped structure with air in contact with its outer surface. The water evaporation suppression plate for a roaster according to claim 1 or 2, characterized in that the inclination of the inclined plate portion gradually increases downwards. The water evaporation suppression plate for a roaster according to claim 1, 2, or 3, characterized in that the radiant plate can be positioned above the inclined plate portion. The water evaporation suppression plate for a roaster according to claim 4, characterized in that the radiant plate can be placed on the inclined plate portion. The water evaporation suppression plate for a roaster according to claim 1, 2, 3, 4, or 5, characterized in that the lower end of the inclined plate portion is set below the flame port of the burner.