JP2000060742A - Electric cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric cooking apparatus wherein a catalyst is utilized to effect a sufficient purification action even if a large amount of smoke is produced. SOLUTION: In the electric cooking apparatus an exhaust passage 18 is provided to send an air A containing smoke drawn from a number of suction holes 16 formed on the top side of an inner box 3, being a cooking cabinet, to an exhaust hole 17 formed at a proper position of an outer box located outside the box 3, and the passage 18 is comprised of a first passage 18a formed between an inner box top side 3a and a cover member 19 attached to the side 3a and a second passage 18b which leads from the passage 18a to the exhaust hole 18 and includes a suction fan 25. And, an auxiliary heater 20 located near the holes 16 and a catalyst 21 located on the downstream side from the heater 20 are disposed between the cover member 19 and the top side 3a of the box 3, thereby, the catalyst for purifying the air A drawn from the holes 16 is heated by the heater 20 and moreover the catalyst is heated further by the heat released from the side 3a heated by the heater 20 so that the catalyst can be activated rapidly and sufficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric cooker such as a fish roaster.

[0002]

2. Description of the Related Art For example, an electric cooker such as a fish roaster is provided with a cooking cabinet having a heating source such as a heater,
It is configured to heat and cook fish etc. in the cooking cabinet,
Since a large amount of smoke is generated during heating and cooking, how to purify the air containing this smoke is a major issue, and in recent years, electric cookers equipped with a catalyst for decomposing smoke have been developed.

For example, as disclosed in Japanese Unexamined Patent Publication No. 9-322861, it is provided in the rear of the upper surface of the outer box forming the outer surface of the cooker body from the intake hole formed in the back surface of the inner box forming the cooking cabinet. An exhaust passage extending to the exhaust hole is provided, and a catalyst, an auxiliary heater for heating the catalyst, and an intake fan are provided in the exhaust passage to purify air containing smoke sucked from the intake hole by the intake fan with the catalyst. Later, it is proposed to discharge the gas through an exhaust hole. In this case, the upstream side portion of the exhaust passage is configured by the catalyst cover attached to the back surface of the inner box, and the catalyst and the auxiliary heater are arranged between the catalyst cover and the back surface of the inner box.

[0004]

However, in the case of the above-mentioned known example, the upstream side portion of the exhaust passage must be formed by the catalyst cover attached to the back surface of the inner box, and the depth dimension of the product must be increased. In addition to the problem that it cannot be obtained, the upper heater is usually provided in the upper center of the inner box in the left-right direction, so that the catalyst arranged in the catalyst cover is not sufficiently heated by the upper heater. There is a risk that rapid and sufficient activation of the catalyst may not be obtained.

The present invention has been made in view of the above points, and sucks air containing smoke from an intake hole formed in the top surface of the inner box forming the cooking chamber and discharges it through the exhaust passage. By contacting the catalyst with smoke-containing air during the process, it is possible to obtain a quick and sufficient activation of the catalyst, and thus to obtain a sufficient purification action even when a large amount of smoke is generated. The purpose is to do.

[0006]

According to the first aspect of the invention, as means for solving the above-mentioned problems, an outer box forming the outer surface of the cooker body and a cooking cabinet inside the outer box are formed. An inner box, a grill that is freely placed in and out of the inner box, a saucer placed on the bottom of the inner box, an upper heater that is provided above the grill in the inner box, and the grill In an electric cooker equipped with a lower heater provided between a net and the saucer, air containing smoke sucked from a plurality of intake holes formed on the top surface of the inner box is applied to a proper place of the outer box. An exhaust passage leading to the formed exhaust hole is additionally provided, and the exhaust passage has a first passage formed between the inner box top surface and a cover member attached to the inner box top surface, and the first passage. A second passage having an intake fan extending from one passage to the exhaust hole, and Between the cover member and the inner box top Prefecture, it is arranged and a catalyst positioned in the vicinity of the downstream side of the auxiliary heater and the auxiliary heater located in the vicinity of the intake holes.

With the above-mentioned configuration, heating cooking (for example, grilling fish) in the inner box forming the cooking cabinet
When a large amount of smoke is generated in the inner box, the smoke-containing air is sucked into the exhaust passage from the intake hole formed on the top surface of the inner box and exhausted through the exhaust passage. In the process of being guided to the hole, it will be purified by contact with the catalyst activated by the auxiliary heater, but the catalyst is heated from the auxiliary heater and from the top surface of the inner box heated by the upper heater. Since it is also heated by heat radiation, rapid and sufficient activation of the catalyst can be obtained. Therefore, even if a large amount of smoke is generated,
It can be sufficiently purified when passing through the catalyst.

According to a second aspect of the present invention, the formation position of the intake hole is set to one side opposite to the formation position of the exhaust hole on the top surface of the inner box, and the catalyst is placed on the inner box top. When it is arranged at a position on the opposite side of the center of the surface in the left-right direction from the formation position of the intake hole, the distance from the intake hole to the catalyst can be made large, so that the flow velocity of smoke passing through the catalyst becomes slow. Therefore, the contact time between the catalyst and the air containing smoke becomes long, and the purification efficiency is improved.

When the portion of the cover member on the downstream side of the catalyst is narrowed so that the exhaust passage cross-sectional area becomes small as in the invention of claim 3, the flow velocity of the exhaust gas after passing through the catalyst (ie, (Exhaust power) can be increased, and the intake fan can be downsized. Therefore, the product can be made compact and the power consumption can be saved.

As in the invention of claim 4, when the formation position of the intake hole is directly above the upper heater, the air containing smoke sucked into the intake hole is heated by contacting the upper heater. As a result, the heating efficiency of the catalyst is further improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 5 show an electric cooker according to a first embodiment of the present invention.

This electric cooker is used, for example, as a fish roaster, and has an outer box 2 forming the outer surface of the cooker body 1 and an inner box 3 inside the outer box 2 forming a cooking cabinet. And a grill 4 placed in and out of the inner box 3 and a saucer 5 placed on the bottom of the inner box 3.
And an upper heater 6 provided above the grill 4 in the inner box 3, and a lower heater 7 provided between the grill 4 and the saucer 5. Reference numeral 8 is a door that covers the front opening of the cooker body 1, and the tray 5 is taken in and out of the cooker body 1 in conjunction with opening and closing of the door 8.

Between the outer box 2 and the inner box 3 in the cooker body 1, the top surface 3a of the inner box 3 and the top surface 2a of the outer box 2 are provided.
And an upper space 9 between them and a left space 10 between one side surface 3b of the inner box 3 (that is, the left side surface in FIG. 2) and one side surface of the outer box 2 (that is, the left side surface in FIG. 2) 2b. , Inner box 3
The other side surface 3c (that is, the right side surface in FIG. 2) and the outer box 2
The right side space 11 between the other side surface 2c (that is, the right side surface in FIG. 2), the back surface 3d of the inner box 3 and the back surface 2d of the outer box 2.
And a back space 12 between them and. The right space 11 has an operation panel portion 13 formed on the front surface of the outer box 2.
Since it is on the back side (see FIG. 4), it is a machine room with a large space.

The upper and lower heaters 6, 6 are provided on the tray 5.
A heat reflection plate 14 for reflecting the radiant heat of 7 upward is placed. The heat-reflecting plate 14 is composed of a metal plate whose heat-reflecting surface is press-molded into a corrugated shape having V-shaped concave grooves 14a, 14a, ... At the bottom of each concave groove 14a, Each oil drain hole 15 is formed. Further, the grill 4 is placed on the peripheral portion of the heat reflection plate 14 placed on the tray 5,
It is supposed to be put in and taken out from the cooker main body 1 together with the saucer 5. Then, the concave grooves 14a, 14a
····························· Both both tapered surfaces to effectively collect the oil component dripping from the fish or other food on the grill 4, and allow it to flow down quickly without stagnation,
It is designed to be dropped from 15 ... And received by the lower tray 5 to prevent the oil content from burning on the heat reflecting plate 14.

The heat reflection plate 14 is made of stainless steel such as AUA430 series having high heat reflection performance.
By reflecting the radiant heat from the upper and lower heaters 6 and 7 in the direction of the cooked food on the grill 4, the cooking efficiency of the cooked food is improved as much as possible, and the heat shielding function to the inside of the saucer 5 allows the heat to enter the saucer 5. It acts to prevent the collected oil from burning and becoming a smoke source.

On the top surface 3a of the inner box 3, a large number of intake holes 16, 16 for sucking the air A containing smoke generated in the inner box 3 are formed. 16
.. The air A containing smoke that has been sucked in from the outer box 2 at a suitable position (for example, the outer box top surface 2 that constitutes the upper surface of the machine room 11).
Exhaust passages 18 leading to the exhaust holes 17, 17 ... Formed in a) are provided. The intake holes 16, 16 ...
A position closer to the left side on the top surface 3a of the inner box (that is, a position on one side opposite to the position where the exhaust holes 17, 17 ...
Is formed in. The intake holes 16, 16 ... Are preferably formed within the range of 1/3 to 1/4 toward the left side on the top surface 3a of the inner box. In addition, the intake holes 16, 16
Is formed immediately above the upper heater 6 as shown in FIG.

The exhaust passage 18 is located in the upper space 9 and is formed between the inner box top surface 3a and a cover member 19 attached to the inner box top surface 3a.
a, and the exhaust holes 17, 17 ... From the first passage 18a
It is comprised by the 2nd passage 18b which leads to.

The cover member 19 is composed of a plate member having an inverted U-shaped cross section, and is arranged in the left-right direction on the inner box top surface 3a so as to cover the intake holes 16, 16 ,.
The right end thereof faces the upper part of the machine room 11.

Between the cover member 19 and the top surface 3a of the inner box, there is an auxiliary heater 20 located in the vicinity of the intake holes 16, 16 ... And in the vicinity of the downstream side of the auxiliary heater 20. The catalyst 21 is arranged. The auxiliary heater 20 heats and activates the catalyst 21.
The distance between the auxiliary heater 20 and the catalyst 21 is preferably 10 to 20 mm in order to efficiently heat the catalyst 21. Further, it is desirable that the auxiliary heater 20 is disposed on the top surface 3a of the inner box slightly to the right of the center in the left-right direction, and the distance from the intake holes 16, 16 ...
It is desirable to set it to 10 mm or more. The reason for doing this is that the distance between the intake holes 16, 16, ... And the catalyst 21 is set so that the air A containing smoke sucked from the intake holes 16, 16 ,. This is to secure Further, a portion of the cover member 19 on the downstream side of the catalyst 21 is formed as a contracted flow portion 19a whose width direction is narrowed so as to reduce the exhaust passage cross-sectional area. Outside air intake 22 having an area
Are formed. The outside air intake 22 suppresses the flow rate of the smoke-containing air A passing through the catalyst 21 by taking in the outside air from the outside air intake 22 so that the contact time between the catalyst 21 and the smoke-containing air A becomes long. is necessary.

The auxiliary heater 20 serves as the cover member 1.
It is held between terminals 23, 23 fixed on both sides in the width direction of 9. The catalyst 21 is a high-performance oxidation catalyst in which a noble metal (for example, platinum, palladium, etc.) is supported on a metal foam having a highly breathable three-dimensional network structure. The entire amount of the air A including smoke flowing through the passage 18a is sandwiched between the cover member 19 and the inner box top surface 3a so as to pass through the catalyst 21.

The second passage 18b is disposed in the machine chamber 11, is connected to the tip of the contracting portion 19a of the cover member 19, and extends downward.
The duct 24 and the tip of the first duct 24 have a suction port 26a.
Of the intake fan 25 with the discharge port 26b facing upward, a second duct 27 connected to the discharge port 26b of the scroll 26 and extending upward, and an upper end of the second duct 27. 29 formed in the top surface 2a of the outer box 2 (see FIG. 4)
And an exhaust grill 28 having the exhaust holes 17, 17 ...

As shown in FIG. 4, the intake fan 25 is a multi-blade centrifugal fan in which a multi-blade centrifugal impeller 30 is rotatably arranged in the scroll 26. Is connected to one rotation shaft 32a of a rotation speed variable type double shaft motor 32 disposed in the motor cover 31. The other rotating shaft 32 of the both-axis motor 32
An axial impeller 33 for cooling the biaxial motor 32 is connected to b. Reference numeral 34 is a duct for introducing cooling air, and a large number of cooling air introduction holes 3 are provided on the rear surface of the duct 34.
5, 35 ... Are formed. Reference numeral 36 is an opening formed in the motor cover 31 for introducing cooling.

In the electric cooker configured as described above, the following operational effects can be obtained.

In this electric cooker, when the upper and lower heaters 6 and 7 generate heat, the cooked food such as fish placed on the grill 4 is efficiently cooked from both upper and lower sides.

As the above-mentioned heating and cooking progresses, smoke is generated from the cooked food and the grill 4, and the air A containing this smoke is generated by the intake fan 25 provided in the second passage 18b of the exhaust passage 18. By driving, the suction holes 16, 16 formed in the top surface 3a of the inner box are sucked into the first passage 18a, and the catalyst 21 activated by the auxiliary heater 20 in the process of passing through the first passage 18a. The contact oxidizes and cleans the foul odor and oil fumes.

After that, the purified air A passes through the second passage 1
It is blown out into the room through the exhaust holes 17, 17 ...

That is, in this electric cooker, the air A containing smoke generated by heating is purified by contact with the catalyst 21 in the process of flowing through the exhaust passage 18 and blown out into the room. Therefore, it is safe even when cooking a lot of fumes.

Further, in the present embodiment, the catalyst 21
Is disposed in the first passage 18a in a state of being sandwiched between the inner box top surface 3a and the cover member 19, so that the inner box top surface whose temperature is raised by the upper heater 6 as well as being heated by the auxiliary heater 20. It is also heated by the heat radiation from 3a. Therefore, the catalyst 21 can be rapidly and sufficiently activated, and even if a large amount of smoke is generated, it can be sufficiently purified when passing through the catalyst 21.

Further, the formation positions of the intake holes 16, 16 ... Are set to one side in the left-right direction on the top surface 3a of the inner box (that is, the direction opposite to the formation positions of the exhaust holes 17, 17 ...). , The catalyst 21 is arranged at a position on the opposite side of the center of the inner box top surface 3a in the left-right direction from the position where the intake holes 16, 16 ... Are formed. The distance from the catalyst 21 to the catalyst 21 can be made large, and the flow velocity of the air A containing smoke passing through the catalyst 21 becomes slow. Therefore, the contact time between the catalyst 21 and the air A containing smoke becomes longer, and the purification efficiency is improved.

Further, since the formation positions of the intake holes 16, 16 ... Are right above the upper heater 6, the intake holes 1
The air A containing the smoke sucked into the upper heater 6
The heating efficiency of the catalyst 21 is further improved because it is brought into contact with and heated.

Further, since the portion of the cover member 19 constituting the first passage 18a on the downstream side of the catalyst 21 is formed as a contracted flow portion 19a which is narrowed so that the exhaust passage cross-sectional area becomes small, the catalyst 21 passes through. After that, the flow velocity of exhaust gas (that is, exhaust force) can be increased, and the intake fan 25 can be downsized. Therefore, the product can be made compact and the power consumption can be saved.

Further, the double-shaft motor 32 for driving the intake fan 25 is of a variable rotational speed type, so that both types of food can be handled depending on the type of cooked food (for example, whether smoke is generated or not). The rotation speed of the shaft motor 32 can be changed. In addition, when this electric cooker is used as an oven toaster, since the smoke is extremely small, the operation of the intake fan 25 may be stopped.

A plurality of partition plates which are orthogonal to the air flow direction are provided in the passage between the intake holes 16, 16 ... In the first passage 18a and the auxiliary heater 20 so that smoke-containing air A By forming the meandering passage through which the air flows, the flow velocity of the air A containing smoke can be further reduced, the contact time between the air A containing smoke and the catalyst 21 can be further lengthened, and the smoke removing effect can be further improved. improves.

Further, an adjusting member for adjusting the opening area of the intake holes 16, 16 ... Is provided so as to adjust the opening area of the intake holes 16, 16 ,. You can also

Second Embodiment FIG. 6 shows an electric cooker according to a second embodiment of the present invention.

In this case, the cover member 19 and the top surface 3a of the inner box.
In the first passage 18a formed between and, the catalyst 21 is also arranged near the upstream side of the auxiliary heater 20. By doing so, the air A containing smoke flowing through the first passage 18a comes into contact with the catalysts 21, 21 activated by the auxiliary heater 20, and a further smoke removing effect can be expected. Other configurations and effects are the same as those in the first embodiment, and the description thereof will be omitted.

Third Embodiment FIG. 7 shows an intake hole portion of an electric cooker according to a third embodiment of the present invention.

In this case, the primary smoke removing catalysts 37, 37 are located on the top surface 3a of the inner box 3 just above the upper heater 6.
Recesses 38, 38 for accommodating the
Intake holes 16, 16 ... Are formed at the bottom of each. By doing so, the air A containing smoke immediately after being sucked from the intake holes 16, 16 ...
Smoke removal is further improved by the primary smoke removal by contact with 7. Other configurations and effects
The description is omitted because it is the same as in the first embodiment.

Fourth Embodiment FIG. 8 shows an exhaust hole portion of an electric cooker according to a fourth embodiment of the present invention.

In this case, a variable shutter 39 for adjusting the opening area of the exhaust holes 17, 17 ... Formed on the top surface 2a of the outer box 2 is provided. The variable shutter 39 is
By changing the degree of storage in the shutter storage portion 40 formed on the top surface 2a of the outer box, the exhaust holes 17,
The opening area of 17 ... Can be adjusted. According to the experiment, as shown in FIG. 9, the exhaust holes 17, 17 ...
It is known that when the opening area of No. 2 increases, the exhaust speed becomes slower and the catalytic effect (in other words, the smoke removing effect of the catalyst 21) increases. Therefore, if the slide position of the variable shutter 39 is adjusted according to the type of cooked food (for example, whether smoke is generated more or less), the smoke removal effect corresponding to the type of cooked food is expected. it can. Other configurations and effects are the same as those in the first embodiment, and the description thereof will be omitted.

[0042]

According to the first aspect of the invention, the outer box forming the outer surface of the cooker body, the inner box forming the cooking cabinet inside the outer box, and being able to be put in and taken out from the inner box freely Arranged grill, a saucer placed on the bottom of the inner box, an upper heater provided above the grill in the inner box, and a lower heater provided between the grill and the saucer. And an exhaust passage for guiding air containing smoke sucked from a plurality of intake holes formed on the top surface of the inner box to an exhaust hole formed at a proper position on the outer box. With
A first passage formed between the top surface of the inner box and a cover member attached to the top surface of the inner box;
An auxiliary heater that is configured by a second passage having an intake fan that extends from the passage to the exhaust hole and that is located near the intake hole between the cover member and the top surface of the inner box, and a downstream side of the auxiliary heater. When heat is cooked (for example, grilled fish) in the inner box that forms the cooking cabinet by arranging the catalyst located in the vicinity, the air containing a large amount of smoke generated in the inner box becomes the inner box. In the process of being sucked into the exhaust passage from the intake hole formed in the top surface and being guided to the exhaust hole through the exhaust passage, purification is performed by contact with the catalyst activated by the auxiliary heater. The catalyst is heated not only by the auxiliary heater but also by the heat radiation from the top surface of the inner box whose temperature is raised by the upper heater, so that the catalyst can be activated quickly and sufficiently, and a large amount of smoke is generated. Also There is an effect that it is possible to sufficiently purify it passes through the catalyst.

Further, since the intake hole is formed on the top surface of the inner box and the exhaust passage extending from the intake hole to the exhaust hole formed at a proper position of the outer box is provided, the depth of the electric cooker can be reduced. There is also an effect that can be done.

According to a second aspect of the present invention, the formation position of the intake hole is set to one side in the opposite direction to the formation position of the exhaust hole on the top surface of the inner box, and the catalyst is
When arranged at a position on the opposite side of the formation position of the intake hole from the center in the left-right direction on the top surface of the inner box, the distance from the intake hole to the catalyst can be increased, so that the flow velocity of smoke passing through the catalyst is Become slow. Therefore, the contact time between the catalyst and the air containing smoke becomes long, and the purification efficiency is improved.

When the portion of the cover member on the downstream side of the catalyst is throttled so that the exhaust passage cross-sectional area becomes small as in the invention of claim 3, the flow velocity of the exhaust gas after passing through the catalyst (that is, (Exhaust power) can be increased, and the intake fan can be downsized. Therefore, the product can be made compact and the power consumption can be saved.

As in the invention of claim 4, when the formation position of the air intake hole is directly above the upper heater, the air containing smoke sucked into the air intake hole is heated in contact with the upper heater. As a result, the heating efficiency of the catalyst is further improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a state where an outer casing of an electric cooker according to a first embodiment of the present invention is removed.

FIG. 2 is a vertical cross-sectional view of the electric cooker according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional plan view of the electric cooker according to the first embodiment of the present invention.

FIG. 4 is a vertical cross-sectional side view of a machine room portion of the electric cooker according to the first embodiment of the present invention.

FIG. 5 is an enlarged cross-sectional view of an air intake hole portion in the electric cooker according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional plan view of an electric cooker according to a second embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view of an air intake hole portion in an electric cooker according to a third embodiment of the present invention.

FIG. 8 is an enlarged plan view of an exhaust hole portion of an electric cooker according to a fourth embodiment of the present invention.

FIG. 9 is a characteristic diagram showing a relationship between an opening area of an exhaust hole and a catalytic effect in an electric cooker.

[Explanation of symbols]

1 is a cooker main body, 2 is an outer box, 2a is a top surface, 3 is an inner box, 3
a is a top surface, 4 is a grill, 5 is a saucer, 6 is an upper heater, 7
Is a lower heater, 11 is a machine room (right side space), 16 is an intake hole, 17 is an exhaust hole, 18 is an exhaust passage, 18a is a first passage, 18b is a second passage, 19 is a cover member, and 19a is a contracting portion. , 20 is an auxiliary heater, 21 is a catalyst, and 25 is an intake fan.

Claims (4)

[Claims] 1. An outer box forming an outer surface of a cooker main body, an inner box forming a cooking cabinet in the outer box, a grill arranged so as to be freely put in and taken out from the inner box, and the inner box. An electric cooker comprising a saucer placed on the bottom of a box, an upper heater provided above the grill in the inner box, and a lower heater provided between the grill and the saucer. Then, an exhaust passage for guiding air containing smoke sucked from a plurality of intake holes formed on the top surface of the inner box to an exhaust hole formed at a proper position of the outer box is provided, and the exhaust passage is A first passage formed between the top surface of the inner box and a cover member attached to the top surface of the inner box; and a second passage having an intake fan from the first passage to the exhaust hole. In addition, an auxiliary heater located near the intake hole is provided between the cover member and the top surface of the inner box. An electric cooker in which a heater and a catalyst located near the downstream side of the auxiliary heater are arranged. 2. The formation position of the intake hole is set to one side in the opposite direction to the formation position of the exhaust hole on the top surface of the inner box, and the catalyst is located from the center in the left-right direction on the top surface of the inner box. The electric cooker according to claim 1, wherein the electric cooker is arranged at a position opposite to a position where the intake hole is formed. 3. The electricity according to claim 1, wherein a portion of the cover member on the downstream side of the catalyst is throttled so that an exhaust passage cross-sectional area becomes small. Cooking device. 4. The electric cooker according to claim 1, wherein the intake hole is formed at a position directly above the upper heater.