JP2013057465A - Stove heat shield device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stove heat shield device extremely effective for, in particular, the improvement of a use environment of a commercial kitchen.SOLUTION: Accompanied by the combustion of a burner 6d, combustion exhaust gas is lifted and discharged to an outdoor side via a range hood etc. by its light specific gravity. At the same time, by the draft effect, indoor air is guided to the burner direction, and is partially taken in via an air inflow passage 4 formed in a clearance between a first heat shield plate 2 and a stove 6. This action suppresses the outflow of the combustion exhaust gas to a front face side of the stove 6. A back face cover 2c of the first heat shield plate 2 and an air heat insulating layer 5 block radiation and heat transfer from flames. By these effects, a temperature rise on the stove front face side is suppressed and an indoor environment is drastically improved.

Description

  The present invention relates to a stove heat shield device, and more particularly to a stove heat shield device that is extremely effective in improving the use environment of a commercial kitchen.

Conventionally, with regard to gas stoves that are open-type combustion equipment, part of the flue gas from burner combustion comes to the front of the equipment, so temperature rise and heat radiation, especially in commercial kitchens, the working environment of the user (cooker) The indoor environment deteriorated and the air conditioning efficiency decreased.
In order to solve such problems, there has been proposed a stove heat shield device provided with a heat shield plate that can be raised and lowered on the front surface of the top plate portion (Patent Document 1). Referring to FIG. 7, the stove heat shield device 100 of the same document includes a heat shield plate 101 in which a heat insulating board is covered with a stainless steel plate on the front side of the stove top plate portion 107. When the device is used, the foot pedal 102 is stepped on and the lever 104 is rotated via the rod 103 to lift the heat shield device 101 to the upper side of the top plate portion 107 and locked in the raised position by the ratchet lock mechanism 105. In this state, radiation from the flame of the burner 106 is blocked on the front side. Further, after use, the pedal 102 is depressed to remove the lock mechanism 105, and the heat shield device 101 is lowered to be stored below the top plate portion 107.
Furthermore, a technique has been proposed in which high-temperature exhaust is not discharged around the stove (Patent Document 2). The stove heat shield device of Patent Document 2 is provided with a heat ring at the upper end of the side wall of the combustion chamber, and by closing the upper end opening of the combustion chamber, the exhaust gas is prevented from flowing out to the front side.

JP 9-296936 A JP 2008-145076 A

However, the heat shield device of Patent Document 1 has a problem in that the structure is complicated, resulting in an increase in cost and a high probability of malfunction due to aging.
Further, according to the technique of Patent Document 2, exhaust outflow can be prevented, but heat radiation from the metal heat ring is large, and the problem of deterioration of the working environment of the user (cooker) standing in front is not completely solved. . Furthermore, since the heat ring is arranged in the combustion chamber, it is inevitable to increase the size of the stove.

  In general, there is often no room in the commercial kitchen room, and it is required to make the size of the device as small as possible. The stove according to Patent Document 2 limits the cases that can be installed. In particular, it is difficult to replace the existing stove.

This invention is for solving such a subject, and makes the following content a summary.
That is, the stove heat shield according to the present invention is
(1) A stove heat shield device that suppresses temperature rise on the front side during gas stove combustion,
Comprising a first heat shield disposed on the upper front side of the gas stove,
The first heat shield plate includes a top plate cover portion and a back cover portion,
The top plate cover part is disposed on the upper side of the top surface of the gas stove with a predetermined gap from the top plate surface, and allows external air to be introduced through the gap.
The back cover portion is disposed on the burner front surface of the rear end portion of the top plate cover portion, and can shield radiation from the flame.
It is configured as described above.

(2) In the above invention, the first heat shield plate further includes a front cover portion attached to the front end portion of the top plate cover portion and arranged with a predetermined gap from the upper end portion of the front surface of the gas stove. It is characterized by that.

(3) In each of the above inventions, a second heat shield plate is further provided, and the second heat shield plate is arranged on the upper side of the first heat shield plate with the first heat shield plate. It is characterized by being arranged so as to be able to function as an air heat insulating layer. Moreover, this air heat insulation layer has an effect of preventing the second heat shield plate from becoming high temperature and reducing radiation from the heat shield plate.

(4) In each of the above-mentioned inventions, a gotok portion on which the cooking container can be placed is attached to the rear end portion of the first heat shield plate.

  According to the stove heat insulating device of the present invention, the indoor air is guided in the burner direction via the air inflow path formed in the gap between the first heat shield plate and the gas stove top plate due to the draft effect. The outflow of combustion exhaust gas to the side is suppressed. As a result, the temperature rise on the front side of the stove is suppressed, and the indoor environment is greatly improved.

  Further, in the invention provided with the second heat shield plate outside the first heat shield plate, radiation and heat transfer from the flame are shielded by the presence of the back cover portion and the air heat insulation layer of the first heat shield plate. Therefore, there is an effect that the temperature rise suppressing effect on the stove front side is further improved.

  In addition, since the structure is extremely simple, it is possible to reduce the size of equipment compared to gas stoves using heat shields that can be heated and moved up and down, and can be easily installed in commercial kitchen rooms where there is not enough space. . In particular, it is easy to replace the existing stove. Furthermore, there is an effect that the cost can be greatly reduced upon installation.

It is a figure which shows the structure of the stove heat-insulating apparatus 1 which concerns on 1st embodiment. It is a (cross-section) figure which shows the state which installed the stove heat-insulating apparatus 1 in the gas stove 6. FIG. It is a figure which shows the detailed structure of an installation part same as the above. It is a figure which shows the structure of the stove heat-insulating apparatus 20 which concerns on 2nd embodiment. It is a figure which shows the detailed structure of an installation part same as the above. It is a figure which shows the structure of the stove heat-insulating apparatus 30 which concerns on 3rd embodiment. It is a figure which shows the detailed structure of an installation part same as the above. It is a figure which shows the structure of the stove heat-insulating apparatus 40 which concerns on 4th embodiment. It is a (cross-section) figure which shows the state which installed the stove heat-insulating apparatus 40 in the gas stove 6. FIG. It is a figure which shows the planar structure of the stove heat-shielding apparatus. It is a figure which shows the structure of the stove heat-insulating apparatus 50 which concerns on 5th embodiment. It is a figure which shows the temperature measuring apparatus of an Example. It is a graph which shows the temperature rise inhibitory effect at the time of attaching the heat insulation apparatus (one heat insulation board) of this invention to the conventional stove. It is a graph which shows the temperature rise inhibitory effect at the time of attaching the heat shield apparatus (two heat shield plates) of this invention to the conventional stove. It is a graph which shows the temperature rise progress (wood wall temperature, globe temperature, and heat ring temperature) of a low radiation low range (comparative example). It is a figure which shows the conventional stove heat-insulating apparatus.

  Hereinafter, an embodiment of a stove heat shield device according to the present invention will be described in more detail with reference to FIGS. Needless to say, the scope of the present invention is described in the claims and is not limited to the following embodiments.

<First embodiment>
Referring to FIGS. 1 (a) to 1 (c), a gas stove heat shield device (hereinafter abbreviated as a heat shield device) 1 according to this embodiment is a gas low range stove (hereinafter abbreviated as a stove as appropriate). ) 6 is a device fixed to the upper front end of the front face 6 and having functions of preventing outflow to the front face of the exhaust during burner combustion and shielding flame radiation.
The stove 6 to which the heat shield device 1 is attached includes a main body casing 6a, a leg portion 6f that supports the main body casing 6a, a burner 6d disposed at the center of the top plate portion 6b, a cooking pan 8 disposed around the burner, and the like. Is mounted on the front surface 6g, and a burner ignition knob 6h is provided on the front surface 6g.

The heat shield device 1 is configured in a two-layer structure including an inner first heat shield plate 2 and a second heat shield plate 3 disposed on the outer side. Both the first heat shield plate 2 and the second heat shield plate 3 are preferably made of stainless steel thin plates.
The first heat shield plate 2 is formed in a crank shape in cross section, and the front cover portion 2a, the top plate cover portion 2b arranged in parallel with the top plate portion 6b, and the rear surface arranged vertically on the front upper portion of the burner 6d. And a cover portion 2c. The second heat shield plate 3 is formed in an L-shaped cross section, and is disposed on the front surface of the horizontal plate portion 3a disposed on the top plate cover portion 2b of the first heat shield plate 2 and the back cover portion 2c. And a vertical plate portion 3b.

  A plurality of spacer pins 2f are spot-welded on the back side surface of the first heat shield plate 2, and can be fixed with a certain distance (d1) between the front surface portion 6g and the top plate portion 6b of the stove 6 when the apparatus is fixed. It is configured. Similarly, a plurality of spacer pins 3f are attached to the back side surface of the second heat shield plate 3, and are configured to be fixed with a certain distance (d2) from the first heat shield plate 2 in the installed state. ing. As will be described later, the space formed in the gap between the first heat shield plate 2 and the stove 6 is formed as an air inflow path 4 and in the gap between the first heat shield plate 2 and the second heat shield plate 3. Both of these spaces function as the air insulation layer 5. Note that d1 and d2 may be the same value.

The stove heat shield device 1 is configured as described above. Next, the heat shield mode of the stove heat shield device 1 during burner combustion will be described.
Referring to FIG. 1 (b), as the burner 6d burns, the flue gas rises because of its low specific gravity, and is exhausted outside through a range hood and a duct (both not shown). At the same time, room air is guided in the burner direction by the draft effect. A part of them is taken in via the air inflow path 4 formed in the gap between the first heat shield 2 and the stove 6. By such an action, the outflow of the combustion exhaust gas to the front side of the stove 6 is suppressed. Furthermore, the presence of the back cover portion 2c of the first heat shield plate 2 and the air heat insulating layer 5 shields radiation and heat transfer from the flame. By such an effect, the temperature rise on the stove front side is suppressed, and the indoor environment is greatly improved.

  1 (a) and 1 (c), the horizontal width W and depth D of the first heat shield plate 2, the front cover portion 2a height H1, the back cover portion 2c height H2, the first heat shield plate 2 and Regarding the gap d1 between the front surface portion 6g, the gap d2 between the first heat shield plate 2 and the top plate portion 6b, the gap d3 between the first heat shield plate 2 and the second heat shield plate 3, etc., the dimensions of each part of the gas stove, The optimum dimension can be selected in accordance with the burner capability and the like. The same applies to the following embodiments.

Moreover, although the example of the stove heat-shielding device fixed to a low-range stove was shown in this embodiment, not only this but the apparatus which has a combustion part in the top-plate part surface, for example, a gas stove (a stove with a stand, a table stove), a gas range It can also be applied to the Chinese range.
In the present embodiment, the heat shield plate has a two-layer structure, but a heat shield plate may be further stacked on the upper side of the second heat shield plate.

<Second Embodiment>
Next, with reference to FIG. 2 (a), 2 (b), the gas stove heat-insulating apparatus 20 which concerns on other embodiment of this embodiment is demonstrated. The difference of the configuration of the heat shield device 20 from the configuration of the gas stove heat shield device 1 according to the above-described embodiment is the number of heat shield plates. That is, the gas stove heat shield device 1 has a two-layer structure of the first heat shield plate 2 and the second heat shield plate 3, whereas the heat shield device 20 is configured by a single heat shield plate 21. The heat shield plate 21 is formed in a cross-sectional crank shape like the first heat shield plate 2 of the heat shield device 1, and includes a front cover portion 21a, a top plate cover portion 21b arranged in parallel with the top plate portion 6b, and a burner. 6d, and a rear cover portion 21c arranged in the vertical direction on the upper front surface.
Regarding the point of spot welding of the spacer-pin 22 on the back side of the heat shield plate 21, the front surface portion 6g of the stove 6 and the top plate portion 6b having a certain distance (d21, d22) to secure the air inflow path 23, respectively. It is the same.

  The heat shield mode during burner combustion of the stove heat shield device 20 is the same as that of the stove heat shield device 1 except for the difference due to the absence of the air heat insulation layer. That is, part of the indoor air attracted in the burner direction by the draft effect is taken in via the air inflow path 23 formed in the gap between the first heat shield 21 and the stove 6, and the front side of the stove 6 The amount of combustion exhaust gas flowing out to the exhaust gas is suppressed. Thereby, the temperature rise on the stove front side is suppressed,

<Third embodiment>
Furthermore, a gas stove heat shield device 30 according to another embodiment of the present embodiment will be described. 3 (a) and 3 (b), the configuration of the heat shield plate 31 is different from the heat shield device 20 according to the above-described embodiment in that the configuration corresponding to the front cover portion 21a is not provided. It is. That is, the heat shield device 30 is composed of a single heat shield plate 31 provided with a back cover portion 31b arranged in parallel with the cooking pan 8 and a top plate cover portion 31a arranged in parallel with the top plate portion 6b. It is configured.
The difference from the heat shield device 20 is that the depth D3 of the top cover portion 31a is formed longer than the depth D2 of the top cover portion 21b of the heat shield device 20. The other configuration is the same as the configuration of the heat shield device 1, and thus a duplicate description is omitted.

About the heat shield mode at the time of burner combustion of the stove heat shield device 30, the indoor air is attracted in the burner direction by the draft effect, and passes through the air inflow path 4 formed in the gap between the heat shield plate 31 and the stove 6. The amount of combustion exhaust gas that is taken in and flows out to the front side of the stove 6 is suppressed. The temperature rise on the stove front side is suppressed, and the indoor environment is greatly improved.
In particular, the heat shield device 30 can be suitably used for a stove having a large distance to the burner of the top plate portion.

<Fourth embodiment>
Furthermore, another embodiment of the present embodiment will be described. The configuration of the gas stove heat shield device 40 according to the present embodiment is different from the heat shield devices according to the above-described embodiments in that a gok portion is integrally attached to the rear portion of the heat shield plate.
That is, with reference to FIG. 4 (a)-FIG.4 (c), the heat shield 40 is the heat shield 41 mounted on the stove top plate part 6b, and the iron plate mounted around the burner 6d. Part 42.

  The heat shield plate 41 is arranged so as to surround the front surface of the burner in a semicircular shape, the top plate cover portion 41b arranged in parallel with the top plate portion 6b, the front cover portion 41a arranged in parallel with the front surface portion 6g. And a back cover portion 41c. The gotok portion 42 includes a cylindrical pedestal support portion 42a disposed on the lower side of the top cover portion 41b and a pedestal 42b fixed around the periphery of the upper end thereof. The gotok portion 42 is integrally formed on the upper side of the pedestal support portion 42a by cutting out the rear end side of the top cover portion 41b in a semicircular shape. An external air inlet 42c is provided on the front side of the pedestal support 42a. A plurality of spacer pins 44a and 44b are attached to the back side of the top plate cover portion 41b and the front cover portion 41a, respectively, and at a fixed distance (d1) from the front surface portion 6g and the top plate portion 6b of the stove 6 in the installed state. It is configured to be secured and mountable. This gap is configured to function as an air inflow passage 4.

Next, the heat insulation mode at the time of burner combustion of the stove heat insulation device 40 will be described. As the burner 6d burns, external air is attracted to the burner 6d by the draft effect. A part of the air is supplied to the burner 6d through the air inflow path 43, through the external air inlet 42c. By the inflow, the outflow to the front side is prevented as in the above-described embodiments, and the temperature rise on the stove front side is suppressed.

  In the present embodiment, an example in which the shape of the gotok portion is cylindrical is shown, but the present invention is not limited to this, and a square shape may be used.

<Fifth embodiment>
Furthermore, another embodiment of the present embodiment will be described. With reference to Fig.5 (a), the points of the structure of the gas stove heat shield 50 which concerns on this embodiment differ from the above-mentioned heat shield 40 are that the front cover part 41a is not provided. Instead, support leg portions 51a are provided at both front side ends of the top plate cover portion 51b, so that the top plate cover portion 51b can be placed on the stove top plate portion.
The heat shield mode during burner combustion of the stove heat shield device 50 is the same as that of the stove heat shield device 40 except that external air is attracted from the front surface, and therefore redundant description is omitted.
Similarly to the heat shield device 30, the heat shield device 50 can be suitably used for a large stove where the distance between the front side of the top plate portion is long.

<Example>
The heat shield of the present invention was attached to the conventional type, and the temperature was measured for confirming the effect of the present invention. For comparison, measurements were also made for a case without a heat shield and a low radiation type low range stove.
(A) Equipment specifications

(B) Test condition (b-1) Measurement of wood wall temperature A wood wall board is installed in parallel at a position 200 mm away from the front of the equipment, and the thermocouple position C4− of the wood wall board at the top plate height (GL + 445 mm) of the equipment. Together with C6, the wood wall temperature was measured from the burner ignition until 2 hours passed (see FIG. 6A).
(B-2) Measurement of globe temperature Install the globe thermometer in parallel at a position 200 mm away from the front of the equipment, and install it 150 mm above the top height (GL + 445 mm) of the equipment (position equivalent to the wooden wall C2). The glove temperature was measured from the burner ignition until 2 hours passed.

(C) Heat shield device specifications FIG. 2 (a) (one heat shield plate, equivalent to the second embodiment) and FIG. 1 (a) (two heat shield plates, equivalent to the first embodiment) The same type of heat shield was used. 1 (a) and 1 (c), W = 590 mm, H1 = 50 mm, D = 90 mm, H2 = 190 mm
It was. The gap d1 between the front surface of the device was set to 10 mm, and the gap d2 between the first heat shield 2 and the second heat shield 3 was set to 10 mm, and the device was placed on the top of the device.

(D) Result of conventional stove measurement Fig. 6 (b) shows the rise in globe temperature and wood wall temperature (maximum temperature position (C2)) over time with and without heat shield device (one heat shield plate). The temperature measurement result is shown.
The maximum value of the globe temperature due to thermal radiation is 3.2 deg, which is a decrease of 9.0 deg as compared with the conventional type. Further, the maximum value of the wooden wall temperature is 5.9 deg, which is 29.2 deg lower than that of the conventional type.
In addition, FIG. 6C shows the same temperature measurement results as above with and without the heat shield device (two heat shield plates). The result was almost the same as that of one heat shield plate (FIG. 6B). However, as for the globe temperature, the rising temperature suppression effect is further improved.

(E) Low radiation type stove measurement results (comparative example)
FIG. 6D shows the measurement results of the rising temperature with the passage of time of the globe temperature, the wooden wall temperature, and the heat ring temperature. In particular, even when compared with the value of the conventional stove without the heat shield device, it is considered that the glove temperature is high and the influence of radiation from the high temperature heat ring part is large.

  The present invention can be applied not only to a stove heat shield device but also to kitchen facilities having a burner on the top plate such as a gas table and a gas range. Moreover, it is applicable not only to gas equipment but also to equipment using other heat sources such as an electric stove. Furthermore, the present invention can be applied not only to business use but also to other use facilities.

1, 20, 30, 40, 50 ... Stove heat shield devices 2, 21, 31, 41, 51 ... First heat shield plates 2a, 21a, 41a ... Front cover portions 2b, 21b, 31a, 41b, 51b ... top plate cover 2c, 21c, 31b, 41c, 51c ... back cover 2f, 2f, 22, 44a, 44b ... spacer pin 3 ... second heat shield 4, 23, 43... Air inflow path 5... Air insulation layer 6... Gas stove 6 b. Part

Claims (4)

A stove heat shield device that suppresses temperature rise on the front side during gas stove combustion,
Comprising a first heat shield disposed on the upper front side of the gas stove,
The first heat shield plate includes a top plate cover portion and a back cover portion,
The top plate cover part is disposed on the upper side of the top surface of the gas stove with a predetermined gap from the top plate surface, and allows external air to be introduced through the gap.
The back cover portion is disposed on the burner front surface of the rear end portion of the top plate cover portion, and can shield radiation from the flame.
A stove heat shield device characterized by being configured as described above.   The first heat shield plate is further provided with a front cover portion attached to a front end portion of the top plate cover portion and arranged with a predetermined gap from a front upper end portion of the gas stove. Item 10. A stove heat shield device according to item 1. Further comprising a second heat shield,
The second heat shield plate is disposed on the upper side of the first heat shield plate with a predetermined gap from the first heat shield plate, and the gap can function as an air heat insulating layer. The stove heat insulating device according to claim 1 or 2, wherein   The stove heat shield device according to any one of claims 1 to 3, wherein a cooking portion capable of placing a cooking container is attached to a rear end portion of the first heat shield plate.

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