JPH04203811A - Heating and cooking device - Google Patents

Abstract

PURPOSE:To provide a heating and cooking device to cause a deodoring catalyst or a sensor disposed in a discharging duct to be operated well for a long period of time by a method wherein a metallic plate having a plurality of holes and a duct disposed at a discharging duct from the metallic plate are removably installed at an inlet port of the discharging duct from within a cooking chamber. CONSTITUTION:A catalyst heating heater 10, a platinum catalyst 9 and a controlling sensor 11 are disposed within a discharging duct 6. A metallic plate 14 having a plurality of holes and a metallic foam filter 15 overlapped and fixed to have a close contact with a discharging duct of the metallic plate are mounted in an oven wall surface 13 of an opening 12 in such a way as it may be freely fitted therein and it may be removably installed by displacing it in a direction indicated by an arrow (a). As a heating is repeated to a certain degree and oil or salt or the like is adhered to a filter 15, this metallic plate and the filter 15 are removed and cleaned, thereafter they are mounted again and they are used repeatedly. Accordingly, odor is efficiently removed for a long period of time and a superior cooked state can be kept by maintaining an accuracy of a high degree of sensor.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heating cooking device, and particularly to a device for heating food such as a household oven grill range.

(Prior Art) Generally, when cooking is carried out using a microwave oven or the like, an odor is generated due to the heating of the food being cooked and the oil adhering to the inner wall of the cooking chamber.

One way to eliminate this odor is to use a fan to force the odor out of the exhaust duct while drawing fresh air into the cooking chamber. In this method, the odor is oxidized and decomposed by a deodorizing catalyst installed in the exhaust duct, deodorized, and released to the outside. By introducing fresh air into the cooking chamber in this manner, the odor concentration is exponentially reduced.

Further, in this exhaust duct, a gas sensor, a humidity sensor, and the like are installed as sensors for controlling cooking. Usually, a punching medal is attached to the entrance of this exhaust duct from the inside of the refrigerator, in which a large number of holes with a diameter of 2 to 3a+a+φ are formed to prevent microwaves from leaking when the microwave oven is used. In this case, the pores are larger than the particles of oil, salt, etc. that are scattered from the food during cooking,
Since these particles easily pass through, there is a possibility that they may adhere to the surface of the deodorizing catalyst or sensor in the exhaust duct.

If inorganic substances such as oil or salt adhere to the surface of the deodorizing catalyst, the surface of the catalyst will be covered and the number of active sites will decrease.
There was a possibility that catalyst performance would deteriorate and the life of the catalyst would be shortened due to combination of chloride and chloride with catalyst, solidification of oil, and coking.

Furthermore, if inorganic matter adheres to the surface of the cooking control sensor, the accurate response of the sensor may be hindered, potentially leading to malfunction of the cooking control.

Therefore, methods have been proposed to install filters with smaller mesh sizes than inorganic particles such as oil or salt, and considering heat resistance, these filters must be made of metal or wool.

However, if such a filter is attached to the inner side of the cooking chamber than the punching surface, it is necessary to attach it closer to the duct than the punching surface because spark discharge is caused by microwave irradiation.

However, even if this method does damage the filter, it is difficult to clean, and if the filter becomes clogged,
There were problems such as poor ventilation and easy dew formation.

(Problem to be solved by the invention) As described above, in conventional heating devices in which a deodorizing catalyst and sensor are installed in the conventional exhaust duct, the performance of the deodorizing catalyst may deteriorate due to inorganic substances such as oil and salt scattered during cooking. There are disadvantages in that the service life is shortened and malfunctions occur because the surface of the cooking control sensor is covered.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a heating cooking device that allows a deodorizing catalyst and a sensor installed in an exhaust duct to operate satisfactorily over a long period of time.

[Structure of the Invention] (Means for Solving the Problem) Therefore, in the present invention, in a heating device in which a deodorizing catalyst and a sensor are installed in the exhaust duct, a metal plate having a plurality of holes is provided from the cooking chamber to the inlet of the exhaust duct. A filter is provided on the exhaust duct side of the metal plate and is detachably disposed.

(Function) According to the above configuration, according to the present invention, oil, salt, and other inorganic substances scattered during cooking are removed from the filter surface by a metal plate having a plurality of holes installed at the opening of the exhaust duct in the cooking chamber. This allows the deodorizing catalyst and sensor in the exhaust duct to maintain good functionality without deteriorating.

Additionally, since the filter is removable, it can be removed periodically to remove inorganic substances such as oil and salt that have adhered to it.

Therefore, by periodically removing and cleaning the filter, ventilation of the filter can always be ensured and dirt can be removed.

Preferably, by integrally forming the filter and the metal plate, it becomes easier to attach and detach the filter.

In addition, since a filter made of metal such as a metal foam filter is formed on the exhaust duct side rather than the metal plate,
Local discharge due to the filter can be prevented.

(Example) Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 are diagrams showing an electronic oven grill range according to an embodiment of the present invention (FIG.
(This is a cross-sectional view.) This electronic oven krill range has a grill function that heats foods to be cooked (hereinafter referred to as food) such as fish and meat by radiation heating using a flat plate heater installed on the oven ceiling, and a sirocco fan and a cold heater (not shown). It has a conventional oven function that bakes bread, cakes, etc. by circulating hot air in the cooking chamber, and a microwave oven function that performs electromagnetic heating using a magnetron (not shown) attached to the side.

This microwave oven has 1. ．． It consists of a main cabinet 1 to which a 2KW cooking heater (not shown) is attached and a magnetron (not shown) attached to the side, and a vertically opening door 2 attached to this. A glass barrier 3 is attached to the cooking chamber 5, and the cooking chamber 5 is configured to be openable and closable by means of a handle 4.

An exhaust duct 6 is provided at the back of the main cabinet 1, and a sirocco fan 7 is driven by a motor 8 on the ceiling to agitate the air in the cooking chamber and exhaust odors through the exhaust duct 6. It has become.

Inside this exhaust duct 6, there are 1. An OKW catalyst heating heater 10, a platinum-based catalyst 9, and control sensors 11 such as a gas sensor, a temperature sensor, and a weight sensor are provided in the opening 12 as shown in FIGS. 3 and 4. As shown in the enlarged view, a metal plate 14 having a plurality of holes and a metal foam filter 15 that is stacked and fixed to the exhaust duct side of the metal plate are installed on the inner wall surface 13 of the refrigerator so that they can be fitted freely. It can be attached and detached by shifting it in the direction of arrow a.

For example, when grilling fish using this electronic oven grill range, place the fish on a grill, place it in the oven, set the selection button on the key panel S on the front of the main cabinet 1 to grill, and press the cooking start button. Press. When the cooking start button is pressed, the grill heater is continuously energized.

Then, when the temperature in the cooking chamber rises and an odor begins to appear, power supply to the catalyst heater 10 is started. A household microwave oven uses a 1°2Kw cooking heater and 1. Since it is impossible to simultaneously energize the catalyst heaters of , OKw, the cooking heaters are energized for 2 seconds and the catalyst heaters are energized for 28 seconds in a time-divided cycle. Therefore, the power of the catalyst heating heater is approximately 66W. When electricity is started to be applied to the catalyst heater 10 in this manner, the catalyst 9 is rapidly heated and is sufficiently activated by the time the odor stops.

Furthermore, heating is continued while controlling the temperature according to the output of the sensor 11, and the fish is grilled to a sufficient degree. When the completion of heating is detected from the output of the gas sensor, the door is opened and the fish is taken out. Generally speaking, fish need to be turned over halfway through cooking.

Then, heating is repeated to some extent and when oil, salt, etc. adhere to the filter 15, the metal plate and filter 15 are removed, washed, and then installed again and used repeatedly.

In particular, most of the use of electronic oven grill ranges is to heat food in microwave mode, and dirt accumulates on the filter surface, so by periodically removing and cleaning it, you can easily remove the accumulated dirt. This is extremely effective in maintaining catalyst activation and sensor accuracy.

Therefore, odor can be efficiently removed over a long period of time, and a good degree of baking can be maintained by maintaining a high degree of sensor accuracy.

In addition, although a metal foam filter is used here as a filter, even a sharp one like this is installed integrally with the metal plate 14 having multiple holes on the exhaust duct side, so it may cause some damage to local areas. There is no risk of electrical discharge.

FIG. 5 shows a comparison between the deodorizing efficiency of this electronic oven grill range and the change in the deodorizing efficiency for odors emitted from acetaldehyde in a conventional electronic oven grill range without a filter. In the figure, the solid line a shows the change in deodorizing efficiency of the electronic oven grill range according to the embodiment of the present invention, and the broken line a shows the change in the deodorizing efficiency of the conventional electronic oven grill range.

As is clear from this figure, by using the filter, it is possible to significantly suppress the decrease in deodorizing efficiency, and it is possible to maintain good deodorizing efficiency for more than 5 years.

In addition, although a metal foam filter was used in the above example,
A fiber filter may be used without being limited to this. When installing a fiber filter, if metal is used for the jig etc., it is preferable to install it closer to the exhaust duct than the metal plate to prevent the risk of local discharge, but if metal is not used, then may be installed closer to the cooking chamber than the metal plate. Furthermore, the mounting method can be changed as appropriate.

〔Effect of the invention〕

As explained above, in the present invention, since the metal plate having a plurality of holes and the filter provided on the exhaust duct side from this metal plate are removably provided at the entrance of the exhaust duct from the cooking chamber, It is possible to make the deodorizing catalyst and sensor installed in the exhaust duct function well over a long period of time, and to obtain a cooking device that is easy to clean and highly reliable.

[Brief explanation of the drawing]

1 and 2 are diagrams showing a microwave oven according to an embodiment of the present invention, FIGS. 3 and 4 are partially enlarged views of the exhaust duct opening of the microwave oven, and FIG. 5 is an embodiment of the present invention. It is a comparative diagram showing the relationship between the deodorizing efficiency and time of the microwave oven and the conventional microwave oven. 1. Main cabinet, 2. Door, 3. Glass barrier, 4. Handle, 5. Cooking chamber, 6. Exhaust duct, 7. Exhaust fan, 8. Motor, 9 ...Platinum-based catalyst, 10...Heater, 11...Sensor, 12.
...Opening, 13, ...Wall surface, 14...Metal plate, 15.
··filter. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a heating cooking apparatus comprising a heating means for heating food in a cooking chamber, an exhaust duct for discharging air from the cooking chamber, and a deodorizing catalyst provided in the exhaust duct, the exhaust duct is discharged from the cooking chamber. A heating cooking device characterized in that a metal plate having a plurality of holes and a filter provided on the exhaust duct side of the metal plate are detachably provided at an inlet.