JPH0221703Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for improving thermal efficiency in a household gas or electric stove.

[Conventional technology]

Conventionally, in a gas stove, high-temperature combustion gas is applied directly to the bottom of a pot, etc., and the heat not absorbed by the pot is dissipated into the air.

Also, in electric stoves, the heater is brought into contact with the bottom of the pot to heat the pot in a thermal conductive manner, and the surrounding air is heated, and the heated air is applied to the bottom of the pot to heat the pot. , in this case too, most of the heated air is dissipated into the air.

[Problem that the invention attempts to solve]

When heating a pot using combustion gas and heated air, only the high-temperature airflow that comes into contact with the circumferential wall of the pot is used to heat the pot; the high-temperature airflow that flows on the outside away from the circumferential wall of the pot is wasted. is dispersed into the air.

In addition, many heating cooking utensils such as pots have flat bottoms, and in order to shorten cooking time, when the amount of heating heat is increased, the speed of the heated airflow increases, causing the airflow to flow outward horizontally across the bottom of the pot. speed increases. Therefore, the high-temperature airflow that flows horizontally outward at the bottom of the pot flows in a portion away from the vertical peripheral wall that stands approximately perpendicular to the bottom, and as a result, as the amount of heating heat increases, the thermal efficiency deteriorates.

[Means for solving problems]

This invention can be placed on the stove and is installed upright along the circumference of cooking utensils that require heating. This is to solve the problem of.

〔Example〕

FIG. 1 is a plan view of an embodiment of a heat efficiency increasing device for a stove according to the present invention, and this device is used by being placed on a stove as shown in FIG. This will be explained below based on the drawings.

Reference numeral 1 denotes an airflow deflection plate in which a plurality of plate materials 2 are arranged in a cylindrical shape.
Rotatably connected.

Both side edges 2a, 2b of the plate material 2 are alternately overlapped with the adjacent plate materials 2, 2.

As shown in FIG. 3, each plate material 2 and the ring shaft 3 are connected to each other by inserting outwardly wound retaining rings 4, 4, which are connected to both sides of the lower edge 2c of each plate material 2, through the ring shaft 3. They are connected together.

The lower edge 2c of each plate material 2 is a horizontal arc surface with a curvature approximately equal to the curvature of the ring shaft 3, and the upper edge 2d is a horizontal arc surface with a curvature smaller than that of the lower edge 2c. It's getting old.

When each plate material 2 is slightly inclined inward, the outer shape of the airflow deflection plate 1 becomes a cylindrical body with a truncated conical shape,
At that time, the diameter of the upper opening is D1, and the diameter of the lower ring shaft 3 is D2.

A coating film 5 made of a far-infrared emitting material is provided on the inner surface of each plate material 2.

The far-infrared emitting material is an ink-based paint made by mixing one or more types of fine ceramic powder such as titanium oxide, silicon dioxide, and iron oxide with an appropriate binder, or a glaze for ceramics. The coating film 5 is solidified at room temperature or at high temperature.

[Effect]

The thermal efficiency increasing device for a stove according to the present invention has a second
As shown in the figure, for example, the upper surface 11 of the gas stove 10
, the airflow deflection plate 1 is placed around the gas burner 12.
The ring shaft 3 is placed on the lower part of the pan, and the airflow deflecting plate 1 is erected along the circumferential surface 15 of a cooking utensil that requires heating, such as a pot 14, placed on a pot stand 13.

At this time, the upper end of the airflow deflection plate 1, that is, the upper edge 2b of each plate member 2, is brought as close as possible to the circumferential surface 15 of the pot 14.

Since both side edges 2a and 2b of each plate material 2 are stacked alternately, when one plate is rotated, all the plates 2 move together, and the opening shape of the upper edge 2d is always approximately circular. .

When the gas burner 12 is ignited in this state, the high temperature gas A flows in the direction of the solid arrow. Note that the airflow B indicated by the dotted arrow is the conventional flow of high-temperature gas when the airflow deflection plate 1 is not provided.

Conventionally, the higher the amount of gas combusted, the faster the high-temperature gas A' flowing outward along the pot bottom 16 flows away from the circumferential surface 15 of the pot 14 like air stream B'. The velocity air flow A' tended to block contact with the hot gas at the circumferential surface 15.

The airflow deflection plate 1 of the present invention deflects the horizontal high-temperature gas airflow in the vertical direction, and causes the high-temperature gas A to flow along the circumferential surface 15 of the pot 14.

At this time, the airflow flowing on the outside away from the circumferential surface 15, that is, the high-temperature gas A that contacts the airflow deflection plate 1 and flows along it, is absorbed by the far-infrared emissive coating applied to the inner surface of the airflow deflection plate 1. The membrane 5 is heated. Therefore, far infrared rays C are emitted from the coating film 5 toward the circumferential surface 15, and the pan 15 absorbs the far infrared rays C from the circumferential surface 15 and is heated.

The far infrared rays can cross the airflow and heat the pan 15 regardless of the flow of the airflow of the high-temperature gas A, and if the airflow deflector plate 1 alone is used, the pan 15 can be dissipated into the air as in the conventional case. The heat source is obtained from the heat of high-temperature gas passing through the outside, away from the

In addition, when performing extremely weak combustion called "toro-bi", if the gap between the upper edge of the airflow deflection plate 1 and the pot 14 is made small, the airflow velocity of the high-temperature gas A is slow, so the airflow deflection plate 1 Heat is accumulated between the pots 14 and heats the surrounding surface 15 and the coating film 5, and the coating film 5 can emit far infrared rays C to effectively heat the surrounding surface 15.

[Other Examples]

FIG. 4 shows another embodiment of a plurality of plate materials 2 forming the airflow deflection plate 1, in which the plate materials 2' shown on the periphery have an upper end portion of the inner side edge 2a when overlapped. Bend it slightly inward and insert the inward protruding piece 16.
is provided.

This projecting piece 16 connects the upper edge 2d of the plate 2' to the pot 14.
This is to keep the interval at which the hot gas A flows out to a minimum predetermined value by coming into contact with the circumferential surface of the pot 14 when the hot gas A approaches the circumferential surface 15 of the pot 14 .

In addition, since each plate material 2 is interlocked with each other, the protruding piece 16
may be provided on any one of the plurality of plate materials 2.

FIG. 5 shows still another embodiment of the plate material 2, in which the plate material 2'' shown on the circumferential surface is replaced with any two of the plate materials 2 shown in FIG. 1 that face each other in the radial direction.

A handle 1 protruding outward is provided on the outer surface of the plate 2″.
7 is fixedly attached, and a projecting piece 16' is provided at the upper end of the handle 17 and projects inwardly through the upper edge 2d of the plate material 2''.

The protrusion 16' acts in the same manner as the protrusion 16, and the handle 17 rotates each plate 2,
It is also used to put the device on and take it off the stove.

FIG. 6 is a diagram showing another example of the airflow deflection plate.

The airflow deflection plate 21 shown in FIG. 6 has a side wall 21a bent in a bellows shape in the circumferential direction to form a cylindrical body with an open top and bottom.

It is preferable that the air flow deflection plate 21 has a truncated conical shape in which the opening area of the lower edge 21c is larger than the opening area of the upper edge 21b.

A coating film 5 made of a far-infrared emitting material is provided on the inner surface of the bellows-shaped airflow deflection plate 21.

The airflow deflection plate 21 is made of a thin metal plate such as aluminum that can maintain its shape with appropriate strength when bent into a bellows shape, and its upper and lower openings can be easily expanded or pinched. ing.

This airflow deflection plate 21 is also used by being placed on the upper surface 11 of the stove 10 and erected at an appropriate distance from the circumferential surface 15 of the pot 14, similarly to the one shown in the second figure.

This embodiment has high flexibility in dimensions, is easy to process, is manufactured at low cost, and has a serrated upper edge opening, so that the trough 21d of the bellows is formed in the pot 14. Even if it comes into contact with the circumferential surface 15, the minimum number of ventilation holes can be secured at the peak portion 21e.

The embodiments shown in Figs. 1 and 6 can be used with various cooking utensils and pots with different diameters, but when used with pots with a specific diameter,
The airflow deflection plate may be a truncated conical cylinder whose upper and lower opening diameters are constant, or a cylindrical body whose upper and lower opening diameters are equal.

[Effect of idea]

According to the present invention, heated gas or air is deflected so as to come into contact with the outer peripheral surface of a cooking utensil that requires heating, and the heat of the heated gas or heated air flows outside the outer peripheral surface without contacting the cooking utensil. can be converted into far-infrared rays and absorbed by cooking utensils, greatly increasing thermal efficiency.

Furthermore, since the amount of heat wastefully dissipated into the air is reduced, the room temperature does not rise excessively, and energy loss during cooling can be reduced.

Furthermore, the cooking utensil heats up evenly throughout the pot, improving the quality of the food.

[Brief explanation of drawings]

FIG. 1 shows the first part of the thermal efficiency increasing device according to the present invention.
The plan view of the embodiment and FIG. 2 show the usage state of the device, and the - line vertical sectional view in FIG.
FIG. 3 is a perspective view of one plate in the apparatus shown in FIG. 1, FIG. 4 is a perspective view of another embodiment of the plate, and FIG. 5 is a perspective view of yet another embodiment of the plate. FIG. 6 is a perspective view showing another embodiment of the thermal efficiency increasing device of the present invention. 1...Airflow deflection plate, 2, 2', 2''...Plate material, 2
a, 2b... side edge, 2c... lower edge, 2d... upper edge, 3... ring shaft, 4... retaining ring, 5... coating film, 10... stove, 11... upper surface, 12... ...Gas burner, 13...Pot stand, 14...Pot, 15...
Peripheral surface, 16, 16'... Protruding piece, 17... Handle, 2
1...Airflow deflection plate, 21a...Side wall, 21b...
Upper edge, 21c...lower edge, 21d...trough, 21e
...Mountain part, A, A'...High temperature gas, B, B'...Air flow, C...Far infrared rays, D1, D2...Opening diameter.

Claims (1)

[Claims for Utility Model Registration] (1) A far-infrared emitting material is applied to the inner surface of an airflow deflection plate that can be placed on a stove and is installed upright along the circumference of cooking utensils that require heating. A thermal efficiency increasing device for stoves that is coated. (2) The airflow deflection plate is divided into a plurality of plates, and the lower end of each plate is rotatably supported around a horizontal axis, and both sides of each plate are stacked alternately to form an annular arrangement. A thermal efficiency increasing device for a stove as set forth in claim (1) of the utility model registration claim. (3) The thermal efficiency increasing device for a stove according to claim (2), wherein at least one of the plurality of plates in the airflow deflection plate is provided with an inward protruding piece at its upper end. (4) The thermal efficiency increasing device for a stove as set forth in claim (1), wherein the plurality of plates in the airflow deflection plate are arranged in opposite directions in the radial direction and have a handle on the outer surface. (5) The thermal efficiency increasing device for a stove according to claim 1, wherein the airflow deflection plate is a cylinder bent in a bellows shape in the circumferential direction and opened at the top and bottom. (6) Thermal efficiency for a stove as set forth in claim (5) of the utility model registration claim, wherein the bellows-shaped cylinder has a truncated conical shape with a lower opening area larger than an upper opening area. Increase device.