JP2007271107A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating cooker capable of purifying exhaust air and discharging the same to the external while preventing disadvantage of cost-up. <P>SOLUTION: In this heating cooker provided with a heating chamber comprising a heating means for heating a cooked object, an exhaust air passage 13 for discharging the exhaust air from the heating chamber 7 to the external, and an oxidation catalyst-type exhaust air purifier 16 for oxidizing the exhaust air discharged to the external through the exhaust air passage 13, the exhaust air purifier 16 is constituted by arranging a plurality of metallic plate bodies 17 retaining oxidation catalyst, in a stacked state over the full width or approximately full width of the exhaust air passage 13 in a state of forming exhaust air flow passages A along the longitudinal direction of the exhaust air passage 13 respectively between the adjacent metallic plate bodies. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating chamber provided with a heating means for heating an object to be cooked, an exhaust passage for exhausting the exhaust from the heating chamber to the outside, and an exhaust exhausted to the outside through the exhaust passage. The present invention relates to a cooking device provided with an oxidation catalyst type exhaust gas purification device for oxidizing the gas.

  In the heating cooker, the exhaust gas generated when cooking the food to be cooked in the heating chamber is purified by the exhaust gas purification device. As the exhaust purification device, an oxidation catalyst (platinum) is supported on a three-dimensional porous body made on the basis of a foamed material such as urethane and processed and molded (for example, see Patent Document 1) In some cases, a molded product processed and formed into a honeycomb shape has a catalytic function (see, for example, Patent Document 2). Although not described in Patent Document 2, for example, an oxidation catalyst made of a noble metal such as platinum or palladium is supported on a formed body made of a honeycomb-shaped ceramic body or the like.

JP-A-4-169716 JP-A-6-50555

  In the configuration of Patent Document 1, the exhaust purification device is manufactured by supporting an oxidation catalyst on a three-dimensional porous body. However, in such a configuration, exhaust gas to be purified passes through a fine mesh. The passage of was narrow. As a result, there is a disadvantage that when the exhaust gas flowing from the heating chamber through the exhaust passage passes through the exhaust gas purification device, the flow resistance is too large and the exhaust gas cannot be discharged well. In particular, in a cooking device or the like that exhausts the exhaust from the heating chamber to the outside by natural convection without the forced exhaust means for forcibly exhausting the exhaust from the heating chamber, the exhaust is exhausted to the outside through the exhaust purification device. Things are difficult to do.

  Moreover, in the structure of patent document 2, since the support body in the said exhaust purification apparatus is comprised by the molded object which is integrally processed and molded, when producing a cooking-by-heating machine, it can put in the cooking-by-heating machine. There is a disadvantage in that the cost is high because a dedicated molded body must be manufactured in accordance with the shape of the exhaust path, and a mold for producing the molded body needs to be newly manufactured. Further, even when the specification of the heating cooker is changed and the shape of the exhaust passage is changed, it is necessary to recreate a molded body having a different shape each time, which increases the cost.

  An object of the present invention is to provide a heating cooker that can purify exhaust gas and discharge it to the outside satisfactorily while avoiding the disadvantage of increasing costs.

  A heating cooker according to the present invention includes a heating chamber provided with heating means for heating an object to be cooked, an exhaust passage for exhausting exhaust from the heating chamber to the outside, and an external through the exhaust passage. And an exhaust gas purification device of an oxidation catalyst type that oxidizes the exhaust gas discharged to the exhaust gas. The first feature of the exhaust gas purification device is that the exhaust gas purification device is made of a plurality of metals carrying an oxidation catalyst. The plate body is configured in such a manner that the exhaust flow passage along the longitudinal direction of the exhaust passage is formed between adjacent ones, and is arranged in a stacked state over the full width or substantially the full width of the exhaust passage. is there.

  According to the first characteristic configuration, the exhaust gas purification apparatus includes a plurality of metal plates carrying an oxidation catalyst, and the exhaust gas passage is formed in a state in which an exhaust flow passage is formed between adjacent metal plates. It is arranged in a stacked state over the entire width or substantially the entire width. In other words, a plurality of exhaust flow passages are formed in a state where the exhaust purification device is disposed in a state where the internal space of the exhaust passage is partitioned by a plurality of metal plates. Incidentally, platinum, palladium or the like is used as the oxidation catalyst.

  And the exhaust gas generated by heating the cooking object by the heating means for heating the cooking object in the heating chamber is good through a plurality of exhaust flow passages when passing through the place where the exhaust gas purification device is provided. Will flow and be discharged. Further, since the metal plate located on both sides of each exhaust flow passage carries an oxidation catalyst, the exhaust gas was purified by being oxidized while flowing through each exhaust flow passage. It will be discharged outside in the state.

  Moreover, the exhaust emission control device is a simple configuration in which a plurality of metal plates are arranged in a stacked state over the entire passage width or substantially the entire width of the exhaust passage in a state in which an exhaust flow passage is formed between adjacent ones. Since it is possible to cope with the configuration, for example, a mold for processing and molding a member for an exhaust purification device in accordance with the shape of the exhaust passage, such as when an oxidation catalyst is supported on a molded body, is greatly increased. There is no disadvantage that causes a significant increase in cost, and it is easy to avoid the disadvantage of increasing the cost.

  Therefore, it has become possible to provide a cooking device that can purify the exhaust gas and discharge it to the outside satisfactorily while avoiding the disadvantage of increasing the cost.

  According to a second characteristic configuration of the present invention, in addition to the first characteristic configuration, the exhaust purification device includes a plurality of the plurality of the plurality of exhaust purification devices disposed inside a substantially cylindrical frame body configured to fit into an inner surface of the exhaust path. It is in the point comprised so that the metal plate body of this may be hold | maintained.

According to the second characteristic configuration, since the plurality of metal plate bodies are held inside the frame body, troublesome work such as providing a plurality of metal plate bodies separately in the exhaust passage, etc. Without being hung, it can be easily mounted by mounting it on the exhaust passage in a state where a plurality of metal plates are held inside the frame in advance. In addition, since the frame body is substantially cylindrical and is configured to fit into the inner surface of the exhaust passage, it does not hinder the flow of exhaust gas, and the outer periphery of the frame body and the inner surface of the exhaust passage Since no gap is formed so that the exhaust gas passes without being oxidized, the exhaust gas flows through each of the exhaust flow passages, so that the oxidation treatment can be properly performed.
In addition, such a frame body should just be a substantially cylindrical structure which hold | maintains a several board body, it is not necessary to use the metal mold | die etc. for a process shaping | molding, and responds at low cost. Is possible.

  In the third feature configuration of the present invention, in addition to the first feature configuration or the second feature configuration, the plurality of metal plates are formed in a shape in which convex and concave portions are alternately repeated, In addition, the convex curved portion and the concave curved portion are provided in a state of being aligned along the exhaust flow direction.

  According to the third characteristic configuration, the plurality of metal plates are formed in a shape in which the convex and concave portions are alternately repeated, so that they are formed in a flat plate shape if the overall width is the same. The surface area can be made sufficiently large compared to the above, and the convex curved portion and the concave curved portion are arranged in a line along the exhaust flow direction. Since the fluid flows while alternately passing through the concave and curved portions, the contact area with the plate can be increased as much as possible.

  Therefore, when arranging a plurality of plate bodies side by side in a limited space in the exhaust passage, the surface area of the plate body, in other words, the area where the exhaust gas contacts the oxidation catalyst is widened by effectively using the space for the arrangement. Thus, when the exhaust gas passes through each exhaust flow passage, it is possible to make it as easy as possible to contact the oxidation catalyst.

  In addition to any of the first to third feature configurations, the fourth feature configuration of the present invention is a state in which the plurality of metal plate bodies are inclined with respect to the longitudinal direction of the exhaust passage and It exists in the state provided in the state which arranges with a setting space | interval.

  According to the fourth characteristic configuration, the plurality of metal plate bodies are provided in a state in which they are inclined with respect to the longitudinal direction of the exhaust passage and are arranged at a set interval. Since the plate made of steel is provided in a state inclined with respect to the longitudinal direction of the exhaust passage, the exhaust flowing along the longitudinal direction of the exhaust passage from the upper side of the exhaust purification device is As a result, the exhaust gas is reliably oxidized even if the distance between the metal plates is set to be wide. It comes into a state where the oxidation treatment is performed in contact with the catalyst.

  Therefore, even if a wider interval is set as the set interval so that the ventilation resistance when the exhaust gas flows is reduced, the exhaust gas is reliably oxidized, so that the exhaust gas reliably contacts the oxidation catalyst. As a result, it is possible to reduce the ventilation resistance when exhaust flows through the exhaust passage and exhaust the exhaust to the outside as smoothly as possible while performing the oxidation treatment and performing the purification process satisfactorily.

  According to a fifth characteristic configuration of the present invention, in addition to any one of the first characteristic configuration to the fourth characteristic configuration, the exhaust from the heating chamber is arranged at a location closer to the exhaust flow direction in the exhaust path than the exhaust purification device. A heating means for heating the exhaust gas is provided.

  According to the fifth characteristic configuration, the heating means for heating the exhaust is provided, so that the exhaust from the heating chamber is heated by the heating means for exhaust heating and the temperature is raised to the exhaust purification device. Can be made to flow.

  In other words, the exhaust purification device is configured as an oxidation catalyst, and the oxidation catalyst is not subjected to a favorable oxidation treatment at a low temperature state, and is activated and a good oxidation treatment is performed at a high temperature state. For example, when platinum is used as the oxidation catalyst, a high temperature of about 300 ° C. is good, and when palladium is used as the oxidation catalyst, a high temperature of about 400 ° C. is good. The exhaust from the heating chamber is heated by the heating means for heating the object to be cooked, and is heated to a high temperature. In the heating by the heating means for heating the object to be cooked, the temperature of the exhaust is changed by the oxidation catalyst. It may not rise to a temperature that activates and performs a good oxidation treatment.

  Accordingly, the exhaust gas from the heating chamber is heated by the heating means for exhaust gas heating to flow toward the exhaust gas purification device in a state in which the temperature is raised, so that the oxidation catalyst is activated and the oxidation treatment is performed. It becomes possible.

  In addition to the fifth feature configuration, the sixth feature configuration of the present invention is a temperature detection means for detecting the temperature of the exhaust gas introduced into the exhaust purification device, and the detected value of the temperature detection means activates the exhaust purification device. There is a heating amount adjusting means for adjusting the heating amount of the heating means for exhaust gas heating so that the temperature is suitable for the heating.

  According to the sixth feature, the temperature detection means detects the temperature of the exhaust gas introduced into the exhaust purification device, and the heating amount adjustment means is suitable for the detection value of the temperature detection means to activate the exhaust purification device. By adjusting the heating amount of the heating means for heating the exhaust gas so that the temperature becomes the same, the temperature of the exhaust gas introduced into the exhaust gas purification device can be set to a temperature suitable for activating the exhaust gas purification device. Become.

  Therefore, the exhaust gas purification apparatus has a temperature suitable for activating the exhaust gas purification apparatus, so that the oxidation catalyst is activated and good oxidation treatment is performed, and the exhaust gas is discharged. It can be cleaned well.

Hereinafter, an embodiment in which a heating cooker according to the present invention is applied to a gas stove will be described with reference to the drawings.
FIG. 1 shows a gas stove provided with a grill G as a heating cooker according to the present invention. In this gas stove, three stove burners 2 are arranged on the top of the stove body 1, and the grill G is placed inside the stove body 1. Arranged and configured in a built-in type gas stove.

  The upper part of the stove body 1 is covered with a top plate 3, and on the upper part of the top plate 3, the virtues 4 for placing heating containers (eg, pans) corresponding to the three stove burners 2 are placed. It is configured to be supported. Further, on the front surface of the stove body 1, three stove operation sections 5 for performing various operations of the stove burner 2 and a grill operation section 6 for performing various operations of the grill G are distributed to the left and right sides of the grill G. Is provided.

Hereinafter, the grill G will be described.
As shown in FIG. 2, a grill box 8 that forms a heating chamber 7 is provided in order to heat an object to be cooked N such as fish, and heating means for heating an object to be cooked that heats the inside of the grill box 8. A grill burner 9 is provided. The grill burner 9 is composed of an upper burner 9a for heating the food to be cooked from the upper side and a lower burner 9b for heating the food to be cooked from the lower side, and the grill 10 for placing the food N to be cooked is It is provided in the state which arrange | positions the juice receiving tray 11 below.

  The grill box 8 is formed in a substantially box shape with a front face portion opened and an exhaust pipe 12 connected to the rear face portion side. The exhaust passage 13 formed in the exhaust cylinder 12 is exhausted including smoke generated when the cooking object N is heated by combustion of the grill burner 9, combustion exhaust gas generated from the grill burner 9, etc. in the grill warehouse 8. It is configured to guide and discharge to the outside from an exhaust portion 14 formed on the rear surface side of the top plate 3. At that time, the exhaust is discharged to the outside through the exhaust passage 13 by natural convection due to temperature rise.

  In addition, the soup pan 11 is provided so that it can be stored and taken out by sliding insertion / removal with respect to the grill box 8 with the grill 10 placed thereon, and the soup pan 11 is grilled on the front surface of the soup pan 11. A door portion 15 is provided that closes the opening of the front surface of the grill cabinet 8 when stored in the cabinet 8.

  The exhaust passage 13 is provided with an oxidation catalyst type exhaust purification device 16 that oxidizes the exhaust gas in the middle of the exhaust passage 13. The exhaust purification device 16 is configured to exhaust a plurality of metal plates 17 carrying an oxidation catalyst in a state in which an exhaust flow passage A along the longitudinal direction of the exhaust passage 13 is formed between adjacent plates 17. The passages 13 are arranged side by side in a stacked state over the entire width or substantially the entire width of the passage 13. Further, the exhaust purification device 16 is configured to hold a plurality of metal plate bodies 17 inside a substantially cylindrical frame 18 configured to fit into the inner surface of the exhaust passage 13. Yes.

Hereinafter, a specific configuration of the exhaust purification device 16 will be described.
As shown in FIGS. 3 and 4, a plurality of metal plates 17 carrying the oxidation catalyst are arranged in a state where they are inclined with respect to the longitudinal direction B of the exhaust passage 13 and at a set interval. It is prepared for. The metal plate 17 is formed in a corrugated plate shape in which convex curved portions t1 and concave curved portions t2 are alternately repeated. In other words, it is constructed by bending a long and slender flat strip into a corrugated plate, and it is constructed to increase the surface area while making the outer dimension in the longitudinal direction smaller than that of a flat plate. ing.
In addition, as a material of the metal plate 17, various metal materials such as nickel, chromium, or aluminum can be used.
Moreover, platinum or palladium can be used as the oxidation catalyst.

  The metal plate 17 is provided in a state in which the convex curved portion t1 and the concave curved portion t2 are arranged along the exhaust flow direction. That is, as shown in FIGS. 3 and 4, each of the metal plate members 17 is provided in a vertically oriented posture and an inclined posture with respect to the longitudinal direction B of the exhaust passage 13 in a plan view. In addition, the exhaust flow passages A are provided between adjacent ones.

  That is, the metal plate 17 is held by the substantially U-shaped guide rails 25 attached to the upper inner surface and the lower inner surface of the frame 18 in an inclined posture in a plan view and attached in a plurality of rows. It has a configuration. The width of the guide rail 25 is slightly narrower than the thickness of the metal plate 17 formed in a corrugated plate shape in the concave-convex direction, and the position is held by frictional force when mounted on the guide rail 25. In addition, in order to form the exhaust flow passage A between the metal plate bodies 17, the plate bodies 17 are mounted with a predetermined space therebetween. Although not shown, the frame body 18 is fixed to the exhaust cylinder 12 with screws.

  The exhaust flowing into the exhaust flow passage A from the flow path inlet C formed between the adjacent upper ends of the plurality of metal plate bodies 17 is the inclined plate body 17. It will flow toward the lower side in the flow direction while being guided by. Therefore, the convex curved portion t1 and the concave curved portion t2 of the plate body 17 are positioned in a state aligned along the exhaust flow direction, and the exhaust gas flows while contacting the surface of the plate body 17. The exhaust gas is well purified by the oxidation catalyst carried on the body 17.

  With such a configuration, the interval between the plurality of metal plate bodies 17 is wide and the ventilation resistance when the exhaust flows is small, so that the exhaust is discharged outside through the exhaust path 13 by natural convection. Even so, the exhaust can be discharged well to the outside.

  If a plurality of guide rails 25 are arranged at a narrow interval, for example, when improving the exhaust purification function, it is easy to improve by simply increasing the number of metal plates 17. In order to further reduce the airflow resistance, it is possible to easily cope with the improvement by reducing the number of the metal plate members 17 and widening the interval.

  As shown in FIG. 2, an electric heater 19 as a heating means K for heating the exhaust that heats the exhaust from the heating chamber 7 is provided at a location closer to the exhaust flow direction in the exhaust passage 13 than the exhaust purification device 16. Further, a temperature sensor 26 as temperature detecting means for detecting the temperature of the exhaust gas introduced into the exhaust purification device 16, and a detected value of the temperature sensor 26 become a temperature suitable for activating the exhaust purification device 16. And a control unit 21 as heating amount adjusting means for adjusting the heating amount of the electric heater 19.

  When platinum is used as the oxidation catalyst, the temperature suitable for activation is about 300 ° C., so that the control unit 21 is electrically controlled so that the detected value detected by the temperature sensor 26 is 300 ° C. The amount of heating by the heater 19 is changed and adjusted.

  When palladium is used as the oxidation catalyst, the temperature suitable for activation is about 400 ° C., so that the control unit 21 sets the detected value detected by the temperature sensor 26 to 400 ° C. The amount of heating by the electric heater 19 is changed and adjusted.

  In this way, the temperature of the exhaust gas introduced into the exhaust gas purification device 16 is detected, and the heating amount of the electric heater 19 is adjusted so that the detected temperature becomes a temperature suitable for activating the oxidation catalyst. Thus, it is possible to appropriately perform the exhaust gas purification process while suppressing wasteful consumption of electric power.

[Another embodiment]
Hereinafter, other embodiments are listed.

(1) In the above-described embodiment, the exhaust purification device 16 is configured to include a plurality of metal plate bodies 17 that are inclined with respect to the longitudinal direction of the exhaust passage 13 and arranged at a set interval. Although what was illustrated was shown, it may replace with such a structure and may be comprised as follows.

  As shown in FIG. 5, a corrugated metal plate 17 having a narrow and long shape is placed inside a frame 18 formed in a rectangular tube shape, and the plate surface of the exhaust passage 13. In a posture along the longitudinal direction, a configuration may be adopted in which a plurality of sheets are stacked and held in a direction perpendicular to the longitudinal direction of the exhaust passage 13, specifically in the vertical width direction of the exhaust passage 13. At this time, the convex curved portions t1 and the concave curved portions t2 are slightly changed so that the plurality of metal plate bodies 17 form an exhaust flow passage A along the longitudinal direction of the exhaust passage 13 therebetween. Overlapping is performed while the positions are shifted.

  Moreover, in such a structure, about the metal plate body 17 adjacent up and down, the space | interval (pitch) of adjacent convex curved parts when a corrugated convex part and a concave curved part repeat is a little different. It can be carried out in various forms, such as using a shape, or superposing the corrugated metal plates 17 with the flat metal plates 17 interposed between them. it can.

  Further, as shown in FIG. 6, each of the plurality of metal plate bodies 17 may be bent and formed in a spiral state, and they may be arranged in the horizontal direction and held inside the frame body 18.

(2) In the above embodiment, the shape in which the convex and concave portions of the metal plate 17 are alternately repeated is not limited to the corrugated plate shape, but is formed in a sawtooth shape as shown in FIG. Or a rectangular wave.

(3) In the said embodiment, it comprised so that the said metal purification | cleaning apparatus might hold | maintain several metal plate bodies inside the substantially cylindrical frame body comprised in the shape which fits the inner surface of an exhaust path. However, without providing such a frame, for example, an exhaust pipe that forms an exhaust passage is effectively used, and a plurality of metal plates are arranged and held directly on the exhaust pipe. Good.

(4) In the above embodiment, an electric heater is provided as the heating means K for heating the exhaust. Instead of such a configuration, as shown in FIG. 8, a gas combustion type exhaust heating burner is provided. 22 may be used. In this configuration, when operating the exhaust purification device 16, the control unit 21 operates the ignition device 23 to ignite the exhaust heating burner 22 and detects the exhaust purification device 16 detected by the temperature sensor 26. The gas amount adjusting valve 24 is controlled so as to change the gas supply amount so that the temperature of the exhaust gas introduced into the exhaust gas becomes a temperature suitable for activating the exhaust gas purification device 16.

  According to this configuration, by adjusting the heating amount of the exhaust heating burner 22 so that the temperature of the exhaust gas introduced into the exhaust gas purification device 16 becomes a temperature suitable for activating the oxidation catalyst, The exhaust gas purification process can be appropriately performed while suppressing wasteful consumption of gas.

(5) In the above embodiment, the cooking object is heated by a gas combustion type burner as the heating means for heating the cooking object. Instead, a magnetic field generating coil that performs electromagnetic induction heating is used. It may be configured by an electric heating unit, such as those using the above.

Gas stove perspective view Diagram showing the configuration of the grill Perspective view showing the configuration of the exhaust emission control device Notched plan view showing the configuration of the exhaust emission control device Front view showing a configuration of an exhaust emission control device of another embodiment Front view showing a configuration of an exhaust emission control device of another embodiment Sectional drawing of the metal plate body of another embodiment The figure which shows the structure of the grill of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 7 Heating chamber 9 Heating means for heating to-be-cooked object 13 Exhaust path 16 Exhaust purification device 17 Plate body 18 Frame body 26 Temperature detection means 21 Heating amount adjustment means A Exhaust flow passage K Heating means for exhaust heating

Claims (6)

A heating chamber provided with a heating means for heating an object to be cooked, an exhaust passage for exhausting the exhaust from the heating chamber to the outside, and an exhaust treatment for oxidizing the exhaust discharged to the outside through the exhaust passage A heating cooker provided with an oxidation catalyst type exhaust purification device,
In the state where the exhaust purification device forms a passage for exhaust flow along the longitudinal direction of the exhaust passage between adjacent ones of the plurality of metal plates carrying the oxidation catalyst, the exhaust passage A cooking device configured to be arranged in a laminated state over the entire width or substantially the entire width of the passage.   The exhaust purification device is configured to hold the plurality of metal plates inside a substantially cylindrical frame configured to fit into an inner surface of the exhaust passage. 1 is a heating cooker.   The plurality of metal plates are formed in a shape in which convex and concave portions are alternately repeated, and the convex and concave portions are arranged along the exhaust flow direction. The heating cooker of Claim 1 or 2 provided.   4. The structure according to claim 1, wherein the plurality of metal plates are provided in a state where they are inclined with respect to the longitudinal direction of the exhaust passage and are arranged with a set interval. The cooking device described.   The heating means for exhaust heating which heats the exhaust_gas | exhaustion from the said heating chamber is provided in the location in the exhaust flow direction upper side in the said exhaust path rather than the said exhaust gas purification apparatus. Cooking device.   Temperature detecting means for detecting the temperature of the exhaust gas introduced into the exhaust purification device, and heating means for heating the exhaust gas so that the detected value of the temperature detecting means becomes a temperature suitable for activating the oxidation catalyst The heating cooker according to claim 5, further comprising a heating amount adjusting means for adjusting the heating amount.

Images