JP2012021693A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of maintaining an effect of a catalyst for desmoking and deodorizing for a long time after lowering the temperature of exhaust heat to be exhausted from an exhaust opening and completing heating.SOLUTION: In the heating cooker including a cooking chamber 8, a cooking grid 14 for placing a cooking object 15, an upper heating element 9 located above the cooking grid 14, a lower heating element 10 located below the cooking grid 14, an exhaust path 17 for communicating between an exhaust outlet opening 8a provided on the cooking chamber 8 and outside air, air cleaning catalyst 16 provided on the exhaust outlet opening 8a, a catalyst heater 20 which is usually energized during heating the cooking object 15 and heats the air cleaning catalyst 16, and an exhaust fan 18 provided on the exhaust path 17, a base material used for the air cleaning catalyst 16 employs a formed member in which wire mesh is folded, the wire mesh being heavier than a foam metal plate per unit volume.

Description

  The present invention relates to a heating cooker provided with an air purification catalyst in the vicinity of an exhaust outlet of an oven cooking chamber.

  As a conventional cooking device equipped with an oven (roaster part), when heating an object to be cooked such as fish or meat in the oven, the smoke and odor generated in the oven cooking chamber is suppressed from being discharged to the outside. In the vicinity of the exhaust outlet of the cooking chamber, there is a heating cooker equipped with an air purification catalyst and a catalyst heater that heats and activates the catalyst (Patent Document 1).

  Also, a catalyst in which a platinum-based metal is baked on a nickel-chromium-based foam metal plate is known as a catalyst carrier (base material) that has many contact surfaces with malodorous gas and has a high non-bromide performance even when the thickness is reduced. (Patent Document 2). This nickel-chromium-based foam metal plate is often used as a base material for a catalyst for an oven of a heating cooker.

JP 2007-61515 A Japanese Patent Laid-Open No. 6-261841

  In recent years, the development of open kitchens has progressed, and it is strongly desired to reduce the smoke and odor emitted from the exhaust port of the heating cooker when using an oven of a heating cooker such as an IH cooking heater and to lower the temperature of the exhaust heat. ing.

  In recent years, in order to cope with cooking such as bread and pizza that require a relatively large space for cooking, there is a tendency to make the oven cooking chamber larger than before. On the other hand, since there is no change in the size of the main body of the cooking device, by newly installing equipment that lowers the temperature of the exhaust between the oven and the outer shell of the cooking device, or by making the existing equipment larger It is very difficult to further reduce the smoke and odor discharged from the exhaust port of the cooking device and further reduce the temperature of the exhaust heat.

  An object of this invention is to provide the heating cooker which improved the temperature reduction performance of exhaust_gas | exhaustion, without changing the external shape of the catalyst for air purification.

  The present invention has been made to solve the above problems, and includes a cooking cabinet, a grill net on which the food is placed, a heating element used for cooking, an exhaust outlet provided in the cooking cabinet, and outside air. An exhaust passage to be connected; an air purification catalyst using a base material formed by folding a wire mesh; and a catalyst for heating the air purification catalyst that is always energized during heating of the cooked food. It is a heating cooker provided with a heater and an exhaust fan provided in the exhaust passage.

  According to the present invention, the temperature of exhaust heat exhausted from the exhaust port can be reduced. Moreover, the effect of the catalyst which performs a smoke removal and a deodorizing after completion | finish of a heating can be maintained for a long time.

It is an external appearance perspective view of the heating cooker of one Example. Sectional drawing of the oven of one Example.

  Embodiments of the present invention will be described below with reference to FIGS.

  In FIG. 1, reference numeral 1 denotes a main body of a heating cooker, which has an opening 1 a serving as an intake / exhaust passage on the upper surface of the rear part, and is dropped into the system kitchen 7 from the upper surface. 2 is a container such as a pan, which is to be cooked with an object to be heated. Reference numeral 3 denotes a plate made of heat-resistant glass or the like, which is provided on the upper surface of the main body 1 for placing the container 2 thereon. An oven 4 is provided on the left or right side (left side in this embodiment) of the main body 1 below the heating coil 6 described later. An operation unit 5 is arranged on the right front surface of the main body 1 so as to be positioned beside the oven 4 and performs power on / off, setting of heating conditions, and the like. Reference numeral 6 denotes a heating coil, which is arranged two horizontally horizontally below the plate 3 in the upper part of the main body 1 to heat the container 2 by induction.

  The structure of the oven 4 will be described in detail using the cross-sectional view of FIG. Reference numeral 8 denotes a box-shaped cooking chamber having an open front surface, in which an upper heating element 9 and a lower heating element 10 made of a heating element such as a sheathed heater are installed, and an exhaust outlet 8a is provided in the upper rear part. Note that only one of the heating elements may be provided. Reference numeral 11 denotes a tray, which is housed in the cooking chamber 8 so as to be freely inserted and removed from the front opening thereof. An oven door 12 and a handle 13 for closing the opening are attached to the front, and a grill 14 is placed therein. Yes. Reference numeral 15 denotes a cooked product such as fish placed on the grill 14.

Reference numeral 16 denotes an air purification catalyst that purifies smoke and odor generated in the cooking cabinet 8, and is attached in the vicinity of the exhaust outlet 8a. The base material of the air purification catalyst 16 is a wire mesh (for example, a density of 1.3 g / cm ³ , wire) of stainless steel (for example, SUS316) having better corrosion resistance, instead of the conventional foamed metal plate of nickel-chromium alloy. (Diameter 0.2 mm) is folded and formed into an outer shape (same volume) substantially the same as a conventional air purification catalyst. And the palladium used as a catalyst is adhered and fixed to the whole on this base material, and the catalyst 16 for air purification is comprised.

  By configuring the air purification catalyst 16 in this way, the contact area with the exhaust can be increased to the same extent as in the past, and the pressure loss when the exhaust passes can be set to the same extent as in the past. That is, the conventional cooking device itself can be replaced with the air purification catalyst 16 of this embodiment without any design change.

  Further, by folding the wire mesh whose weight per unit volume is heavier than that of the metal foam plate and molding the air purification catalyst 16, even if it has the same outer shape (same volume) as the conventional air purification catalyst, Can be heavy. For example, when the outer shape of the air purification catalyst is 88 × 58.5 × 6 mm, the conventional air purification catalyst is about 16 grams, whereas the air purification catalyst 16 of this embodiment is about 40 grams. It becomes. That is, the weight can be increased by about 2.5 times without changing the external shape and pressure loss. The effect of making the weight of the air purification catalyst 16 heavier than before will be described later.

  An exhaust passage 17 is connected to an exhaust outlet 8a on the inlet side. An exhaust port 19 is formed at the outlet, and is connected to the rear upper surface opening 1a of the main body 1. An exhaust fan 18 is provided in the exhaust passage 17 after the air purification catalyst 16 and is rotated by a motor 23 to forcibly discharge odors and smoke generated in the cooking chamber 8 through the air purification catalyst 16. 19 is exhausted. A catalyst heater 20 for heating the air purification catalyst 16 is installed in the vicinity of the air purification catalyst 16 in the cooking cabinet 8 and heats the air purification catalyst 16. Reference numeral 21 denotes a temperature detection means such as a thermistor for detecting the temperature in the cooking chamber 8 and is provided at the upper part of the cooking chamber 8 on the front opening side and the lower part of the side surface of the tray 11. Reference numeral 22 denotes a cooling passage, which is provided at the lower portion of the tray 11 and cools the tray 11 by flowing air by the rotation of the suction fan 24. An air inlet 25 to the cooling passage 22 is provided in the vicinity of the lower part of the front surface of the cooking chamber 8. 26 is a heat insulating plate provided on the lower surface of the catalyst heater 20 (on the opposite side to which the air purification catalyst 16 is provided across the catalyst heater 20) to efficiently reflect the heat of the catalyst heater 20 to the air purification catalyst 16 side; The air purifying catalyst 16 is provided in order to quickly reach the temperature at which the catalyst is activated.

  The present invention is constituted as described above, and its operation will be described by taking as an example a case where five saury are burned.

  When the user places the cooked fish 15 on the grill 14 of the oven 4 and operates the operation unit 5, the lower heating elements 9 and 10 and the catalyst heater 20 are energized by control means (not shown). Start. At this time, the tray 11 on which the grill 14 is placed need not be filled with water.

  When the cooking 15 starts to be heated, the motor 23 is driven, the coaxial exhaust fan 18 rotates, and the smoke generated from the cooking 15 is discharged from the exhaust outlet 8a provided at the upper rear portion of the cooking chamber 8 to purify the air. The smoke is deodorized and deodorized while passing through the catalyst 16 and is discharged from the opening 1 a on the upper surface of the rear portion of the main body 1 through the exhaust passage 17. The suction fan 24 is also rotated by driving the motor 23, and the indoor cold air is sucked into the cooling passage 22 from the air intake 25 at the lower front of the cooking chamber 8, and the saucer 24 is circulated in the cooling passage 22. Since 11 is cooled, it is not necessary to fill water in the saucer 11 at the time of cooking. And after cooling the saucer 11, it reaches the exhaust port 19 through the air discharge port 22a, and is discharged from the opening 1a of the main body 1.

  The catalyst heater 20 that heats the air purification catalyst 16 is energized continuously from the start of heating the cooked food 15 to the end of heating in order to keep the air purification catalyst 16 always in a good activated state. Yes. Therefore, the temperature of the air purification catalyst 16 continues to rise from the start of heating while heating general cooking, reaches the maximum temperature when the heating ends, and decreases after the heating ends. The air purification catalyst 16 formed by folding a wire mesh on the base material is 2.5 times heavier than the foam metal plate of the base material used in the conventional catalyst even with the same shape (volume). Therefore, it is difficult to warm up and cool down.

  The temperature of the air purification catalyst 16 depends on the heat generated by the catalyst heater 20 that is energized continuously and the food 15 while the food 15 is heated from the start of heating to the end of heating. A temperature of 300 ° C. at which the catalyst is activated is reached in about 6 minutes from the start of heating. Compared to the conventional metal foam metal plate catalyst of the same shape, the increase in weight results in a delay of about 1 minute to increase the temperature to be activated. However, since there is little smoke and odor generated from the cooked product 15 in the initial stage of heating, there is no increase in smoke and odor exhausted from the outlet 19 due to the delay of 1 minute.

  The rate of temperature increase of the air purification catalyst 16 during heating of the food 15 is slower than when the metal foam catalyst is used, so that the maximum temperature of the air purification catalyst 16 at the end of heating of the food 15 is reached. Is about 20 to 30 ° C. lower than when a metal plate catalyst is used, and the temperature of exhaust heat exhausted from the rear upper surface opening 1a of the main body 1 communicating from the exhaust port 19 is similarly lowered.

  Further, since the air purification catalyst 16 is harder to cool than a conventional metal foam metal plate catalyst, the temperature at which the catalyst is activated can be maintained longer by about 1 minute than after the heating of the food 15 is finished. Therefore, it is possible to prevent the oil or the like scattered in the cooking chamber 8 from being exhausted as smoke until the temperature of the cooking chamber 8 is cooled.

  According to the heating cooker of the present embodiment described above, it is possible to improve the temperature reduction performance of the exhaust without changing the size of the air purification catalyst, and to reduce the temperature of exhaust heat exhausted from the exhaust port, The effect of the catalyst that performs deodorization and deodorization after heating can be maintained for a long time.

DESCRIPTION OF SYMBOLS 1 Main body 3 Plate 4 Oven 8 Cooking chamber 8a Exhaust outlet 9 Upper heating element 10 Lower heating element 16 Air purification catalyst 19 Exhaust outlet 20 Catalyst heater

Claims (1)

A cooking chamber,
A grill to place the food,
A heating element used for cooking;
An exhaust passage connecting an exhaust outlet provided in the cooking chamber and outside air;
An air purification catalyst using a base material provided at the exhaust outlet and formed by folding a wire mesh;
A catalyst heater that is energized at all times during the heating of the food and heats the air purification catalyst;
An exhaust fan provided in the exhaust passage;
A heating cooker comprising:

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