JPH0590204U - microwave - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The activation of the deodorizing catalyst of the microwave oven is realized by using the heater heat for heating the grill or the oven. [Constitution] Heater 46 for heating oven or grill
In the microwave oven including the exhaust duct 52 for discharging the internal air, the exhaust duct 52 is connected to the heater 4.
The catalyst 55 for deodorization is arranged near the heater 46 of the exhaust duct 52 so that the catalyst 55 can be heated and activated by the heater 46.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a deodorizing device for a microwave oven.

[0002]

[Prior Art]

 In recent microwave ovens, for example, a microwave oven having a grill or an oven function has become popular. In such a microwave oven, a heating heater (sheath heater, ceramics) generally used for grill heating or oven heating on the ceiling of a refrigerator. A heater, an argon heater, etc.) are provided (see, for example, Japanese Utility Model Laid-Open No. 2-6480).

[0003]

[Problems to be solved by the device]

 However, since the grill heating is generally used for grilling fish and meat, there is a problem that an odor is apt to occur. It is considered that the odor is usually deodorized by providing a catalyst for deodorization, but in general, the catalyst has an activation temperature, and there is a problem that it does not function unless it is under the activation temperature or higher.

[0004]

[Means for Solving the Problems]

 The present invention has been made for the purpose of solving the above-mentioned problems, and in an microwave oven provided with a heater for heating an oven or a grill and an exhaust duct for discharging the air in the refrigerator, the exhaust duct is The catalyst is characterized in that it is arranged through the vicinity of the heater and a catalyst for deodorization is provided near the heater of the exhaust duct so that the catalyst can be heated and activated by the heater.

[0005]

[Action]

 In the configuration of the deodorizing device for a microwave oven according to the present invention, first, since the exhaust duct for discharging the air in the refrigerator is provided near the heater, the air in the refrigerator including the odor of the object to be heated when the grill is heated is Through the exhaust passage in the exhaust duct, it is discharged to the outside through the vicinity of the heater.

Since a catalyst for deodorization is arranged near the heating heater of the exhaust duct, the catalyst is heated by the heat from the heating heater to be sufficiently heated and activated, and The odor in the indoor air discharged to the room can be effectively deodorized through the catalyst.

[0007]

[Effect of the device]

 Therefore, according to the deodorizing device for a microwave oven of the present invention, it is possible to completely eliminate the problem of the conventional deodorizing catalyst being inactivated and the bad odor being released due to insufficient deodorizing.

[0008]

【Example】

 (1) First Embodiment FIGS. 1 to 9 show the configuration of a deodorizing device for a microwave oven according to a first embodiment of the present invention.

First, FIG. 1 shows the overall structure of a microwave oven with a grill / oven function equipped with the deodorizing device. First, in the figure, reference numeral 1 forms a microwave oven main body. Reference numeral 2 denotes a housing portion, and reference numeral 2 denotes a heating chamber (internal space) having a predetermined volume, which is formed inside the housing 1 and has an upper heater 46, which will be described later, on the ceiling portion. Then, on both side wall surfaces 2a, 2b of the heating chamber 2, for example, as shown in FIG. 2, upper and lower three stages of convex shelf receiving portions 3a to 3c, 3a to 3c are arranged in parallel, respectively. Using the left and right shelf receiving portions 3a to 3c and 3a to 3c, as shown in FIG. 1, the first to third cooking plates 4a to 4c are inserted from the front side to the rear side, respectively. It is designed to be supported vertically in parallel.

As shown in FIG. 3 and FIG. 4 in detail, the cooking dishes 4a to 4c each have a recess 18 for accommodating the food to be cooked, and a bottom 6 thereof has As shown in FIG. 5, the sheath heater 5 is arranged and fixed in such a manner that a sufficient and uniform heating area is secured. Further, a heat shield plate 8 is attached to the bottom of the cooking dishes 4a to 4c with screws 9 so as to cover the sheath heater 5 with a heat insulating material 33 interposed. Further, in addition to the screws 9 for mounting the heat shield plate, protrusions 10, 10 ... Protruding at a predetermined height further below the bottom surface position of the heat shield plate 8 are provided at appropriate places. The plurality of convex portions 10, 10 ... Serve as the legs when the cooking dishes 4a to 4c are taken out of the heating chamber 2 and placed on a table or the like.

On the other hand, reference numerals 11a and 11b are pin-shaped power plugs formed at both ends of the sheath heater 5, and the power plugs 11a and 11b are the rear end side edge portions 12b of the cooking dishes 4a to 4c. Are juxtaposed by a predetermined length L and are juxtaposed at a predetermined interval.

Further, as shown in FIGS. 3 and 4, the front end side edge portion of the cooking dishes 4a to 4c indicated by the reference numeral 12a is covered with the protection plate 13 from the front surface side to the rear surface side. Now, it is fixed with screws 14 and 14. The front end side edge portion 12a of the cooking dish covered with the protection plate 13 is engaged with the tip end side engaging portion 15a of the handle 15 for taking out the cooking dish as shown in FIG. 7, for example. The handle 15 is used to take it out of the refrigerator. The engaging portion 15a is located below the hook portion 16 and the hook portion 16 provided with an inverted U-shaped fitting groove that fits into the front end side edge portion 12a of the cooking dishes 4a to 4c from above. And the supporting portion 17 for supporting the bottom wall portion 6a of the cooking dishes 4a to 4c, the cooking dishes 4a to 4c are effectively gripped. In this case, generally, the cooking dishes 4a to 4c are often made of aluminum die cast in order to reduce the weight. Therefore, the handle engaging portion is apt to be damaged as it is, but in the present embodiment, as described above. Since the protective plate 13 covers the engaging portion, such a fear does not occur.

On the other hand, as shown in FIG. 1, the power source plugs 11a and 11b on the cooking plates 4a to 4c side are provided between the back side cavity wall 1a on the range body 20 side and the external panel 19. A pair of left and right power supply sockets 21a, 21b are provided. By inserting the power supply plugs 11a, 11b on the cooking plates 4a-4c side into the power supply sockets 21a, 21b, the sheath heater 5 Power is supplied.

The power sockets 21a, 21b are, for example, as shown in FIG. 6, a metal cylindrical body portion 22 fitted and fixed in the fitting hole of the cavity wall 1a and a rear portion of the cylindrical body portion 22. A holder 23 made of synthetic resin integrally locked to the above, a V-shaped spring-shaped ground terminal 24 fitted in the cylindrical body 22, and protruding rearward from the inside of the holder 23. And a bag-shaped power jack 25 having a slit formed so that it can be opened.

Then, by securely inserting each of the power terminal portion B and the ground terminal portion A of the power plugs 11a and 11b on the cooking dishes 4a to 4c side to the end as shown by phantom lines in the drawing, The grounding terminals on the plug side and the socket side, and the power supply terminals are electrically connected to each other with good contact resistance, and the sheath heater 5 is supplied with power. The sheathed heater 5 of each cooking dish 4a-4c, that is, the lower heater, generates heat.

On the other hand, the upper heater 46 is provided, for example, as shown in FIGS. 1, 8 and 9 above the heating chamber 2 and above the ceiling panel 2d having high thermal conductivity. , A plurality of plate-shaped heating elements 46a, 46a ... Are integrally attached to the lower surface side set recess of the heat transfer plate 47 and are arranged so as to be energizable via the power supply terminals 48a, 48b. There is. A heat shield plate 50 is provided on the upper part of the upper heater 46 via a heat insulating member 49, and a top plate 57, which is an external casing, is attached to the upper part of the heat shield plate 50.

Further, on one side (left side in the drawing) 2a of the side walls 2a and 2b of the heating chamber 2 described above, a punching hole portion 51 is formed, as shown in detail in FIGS. 1 and 9, for example. It communicates with the inside of the exhaust duct 52 on the side via the punching hole 51. As shown in FIG. 9, for example, the exhaust duct 52 is formed by a rectangular cylindrical body provided in the space between the side wall 2a on the heating chamber 2 side and the outer side wall panel 53. The punching hole portion 51 formed on the side wall 2a of the heating chamber 2 and the punching hole portion 54 formed on the outer side wall panel 53 side are made to communicate with each other. A deodorizing catalyst 55 is provided in the exhaust duct 52 as shown in the figure.

The catalyst 55 is formed, for example, by molding an oxidation catalyst in which a precious metal catalyst such as Pt is carried on the surface of a basic carrier such as CaO.Al ₂ O ₃ into a honeycomb structure, and It is designed to deodorize the odor in the discharged exhaust gas very efficiently in a low pressure loss state.

The catalyst 55 configured as described above is configured by forming a large number of punching holes 58, 58, ... On a metal plate having high thermal conductivity such as a copper plate so as to have good air permeability. The holding plate 56 is held in the state as shown in the drawing, and the upper end 56a side of the holding plate 56 penetrates the upper wall portion of the exhaust duct 52 to the end portion 47a of the heat transfer plate 47 of the upper heater 46 described above. On the other hand, the catalyst 55 is integrally polymerized and fastened so that the heat transfer performance of the catalyst 55 is good. Therefore, the heat from the upper heater 46 can be efficiently transmitted to the catalyst 55 through the holding plate 56, and the catalyst 55 is effectively heated to the activation temperature in synchronization with the heat generation of the heater 46, and is sufficiently heated. Deodorizing effect due to sufficient oxidative combustion comes to be exhibited. As a result, the air discharged to the outside from the exhaust duct 52 is sufficiently deodorized and has no strange odor.

(2) Second Embodiment Next, FIG. 10 shows a structure of a main part of a deodorizing apparatus for a microwave oven according to a second embodiment of the present invention.

That is, in the structure of the deodorizing device for the microwave oven of the second embodiment, the holding plate 56 itself in the structure of the catalyst of the first embodiment is also a flat heater similar to the heating element 46 a of the upper heater 46. 60, and the upper end portion 60a of the flat heater 60 is attached to the end portion 47a of the heat transfer plate 47 of the upper heater 46 to increase the heating efficiency of the catalyst 55 and the entire catalyst 55 as in the first embodiment. The impact resistance performance is enhanced by surrounding the flat heater 60 with the flat heater 60, and even if the catalyst 55 is cracked for some reason such as long-term use, its shape and function can be maintained as it is. . In this case, the catalyst 55 is held by the flat heater 60 via the insulating plate 61 having a large number of punching holes 62, 62.

For example, in the configuration of the first embodiment, the heating elements 46 a, 46 a, ... Of the upper heater 46 generate heat, and the heat is transmitted to the holding plate 56 side via the heat transfer plate 47, and the holding plate 56 Since the heat of the plate 56 heats the catalyst 55 and the heat transfer structure is indirect, it takes a long time to activate the catalyst 55. Therefore, depending on the type of food, it is possible that a certain amount of off-flavor is released due to insufficient deodorizing function for a certain period after the start of cooking.

However, in the case of the configuration of the present embodiment, since the heating of the food to be cooked and the activation of the catalyst 55 by heating proceed substantially at the same time, such a problem does not occur. Further, since the planar heater 60 and the upper heater 46 are adjacent to each other, the power supply wiring can be shared, and the wiring structure is simple, so that the realization is easy.

(3) Third Embodiment Next, FIG. 11 shows a structure of a main part of a deodorizing apparatus for a microwave oven according to a third embodiment of the present invention.

In the third embodiment, there is a drawback that the temperature rise up to the activation temperature of the first embodiment is slow, and that the second embodiment requires the dedicated flat heater 60 for the catalyst. It is characterized by solving together.

That is, in the configuration of the deodorizing device for the microwave oven according to the third embodiment, the upper heater 46 described above is provided inside the mountain-shaped heat shielding casing 77 provided above the ceiling plate 2d, as shown in the figure. And a punched hole portion of the heating chamber 2 side ceiling plate 2d through the space 70 in the heat shield casing 77. A continuous exhaust duct 73 is provided from the 75 side to the downstream punching hole portion 79 communicating with the external panel side exhaust port of the housing 1, and is located near the exhaust duct 73 side outlet portion 80 of the space portion 70. The catalyst 55 having the same structure as that of the first embodiment is arranged.

When mounting the catalyst 55, a metal band member 79 having high heat conductivity and having a large number of punched holes 78, 78 ... It is fixed. The tip portion 83 of the band member 79 is inserted to the upper portion of the sheath heater 71 in the heat shield casing 77, and receives the radiant heat of the sheath heater 71 to efficiently heat the catalyst 55. .

Therefore, in this configuration, the inside air discharged through the punching holes 75 of the ceiling plate 2d is heated to a high temperature by the sheath heater 71 in the space 70 inside the heat shield casing 77. After passing through the exhaust passage in the exhaust duct 73, it is exhausted to the outside of the housing through the external duct from the punching hole 79 formed in the downstream side wall portion 85.

In the vicinity of the sheathed heater 71 (position of the space outlet 80 in the heat shield casing 77) on the way of the discharge passage, the catalyst 55 is provided over substantially the entire passage as described above, and The catalyst 55 is efficiently heated by the heat of the sheath heater 71 via the band member 79 having high thermal conductivity.

Therefore, the catalyst 55 is effectively heated in synchronization with the heat generating action of the sheathed heater 71, and is quickly heated to the activation temperature, and exhibits a sufficient deodorizing action by oxidative combustion. As a result, the air discharged from the exhaust duct 73 to the outside is sufficiently deodorized and has no strange odor.

(4) Fourth Embodiment Next, FIG. 12 shows a structure of a main part of a deodorizing apparatus for a microwave oven according to a fourth embodiment of the present invention.

The structure of the fourth embodiment is characterized in that, in the structure of the third embodiment, the mounting structure of the catalyst 55 is improved to reduce exhaust resistance as much as possible. As shown in the figure, in this embodiment, the band member 79 as in the third embodiment is eliminated and both sides of the catalyst 55 are locked only by the narrow claw members 81, 81. With such a configuration, the ventilation resistance of the catalyst portion is reduced by the amount of the wide band member 79 eliminated, and the pressure loss is greatly reduced to improve the deodorizing efficiency.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the overall structure of a housing part of a microwave oven equipped with a deodorizing device according to a first embodiment of the present invention.

FIG. 2 is an external perspective view of the microwave oven housing with the door removed.

FIG. 3 is a cross-sectional view showing a configuration of a cooking dish of the microwave oven.

FIG. 4 is a front view (front view) of the cooking dish.

FIG. 5 is a bottom view showing the heater installation structure at the bottom of the cooking dish.

FIG. 6 is a sectional view showing a structure of a power socket portion corresponding to a power plug of the cooking dish side heater.

FIG. 7 is a partial cross-sectional view showing the structure of the front end portion of the cooking dish.

FIG. 8 is an exploded perspective view showing a configuration of the microwave oven main body.

FIG. 9 is a cross-sectional view showing a configuration of a deodorizing device portion of the microwave oven main body.

FIG. 10 is a sectional view showing the structure of a microwave oven deodorizing device according to a second embodiment of the present invention.

FIG. 11 is a partially cutaway sectional view of a microwave oven deodorizing device according to a third embodiment of the present invention.

FIG. 12 is a partially cutaway sectional view of a microwave oven deodorizing device according to a fourth embodiment of the present invention.

[Explanation of symbols]

1 is a housing part, 2 is a heating chamber, 2a is a heating chamber side wall, 2d is a ceiling plate, 46 is an upper heater, 46a is a heating element, 47 is a heat transfer plate, 51 and 54 are punching holes, 52 is an exhaust duct, 55 is a catalyst, 56 is a holding plate, 60 is a flat heater, 70 is a space part, 71 is a sheath heater, 73 is an exhaust duct, and 77 is a heat shield casing.

Claims (1)

[Scope of utility model registration request] 1. A microwave oven comprising a heater for heating an oven or a grill and an exhaust duct for exhausting air in a refrigerator, wherein the exhaust duct is disposed near the heater and the exhaust duct is heated. A microwave oven characterized in that a deodorizing catalyst is provided in the vicinity of the heater, and the catalyst can be heated and activated by the heating heater.