JP2010145031A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To press a planar heater to a curved shape part of a sidewall of an inner box with good adhesiveness. <P>SOLUTION: A body 2 includes the inner box 4 as a heating chamber 5 receiving foods inside. The curved shape part 6 recessed on its inner side is formed on a ceiling plate 42 of the inner box 4, and the planar heater 12 is disposed on the outer face of the curved shape part 6. The planar heater 12 is pressed to the outer face of the curved shape part 6 by a heater presser 13. The heater presser 13 is composed of a curvable plate member, has a plurality of projecting parts 13a projecting to the heating chamber 5 direction, and the planar heater 12 is pressed to the outer face of the curved shape part 6 by the projecting parts 13a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heating cooker in which at least one side wall of an inner box whose inside is a heating chamber is a curved portion.

Conventionally, in a heating cooker, each side surface of a substantially rectangular inner box whose inside is a heating chamber is configured by a flat wall surface, but in the heating cooker described in Patent Document 1, means for improving heating efficiency As described above, a part of the ceiling wall of the inner box projects into a conical convex shape in the heating chamber. By the way, recently, the present applicant has considered a cooking device that can expect a so-called stone pot-like heating effect by making one side wall of the inner box into a curved surface having a concave inner surface. In the case of this configuration, unlike the peculiar shape ceiling wall configuration of Patent Document 1, there is an advantage that a planar heater can be laid on the back surface side of the curved shape portion.
JP 2001-41466 A

  By the way, the conventional planar heater laying structure is a configuration in which the planar heater is screwed to the back surface of the flat wall of the inner box in a state where the planar heater is pressed using a flat plate-shaped heater presser having high rigidity. However, as described above, if the side wall of the inner box has a curved shape, the adhesion of the planar heater to the side wall of the inner box may be impaired. If the sheet heater has poor adhesion to the heat transfer object (inner box side wall), heat radiation may be deteriorated, leading to failure or poor heating efficiency.

  In order to ensure this adhesion, it is necessary to form the heater presser in a curved shape, but it is difficult to form the curved shape so that the side wall of the inner box matches the curved shape, and maintaining the curved surface is also troublesome. It is. In addition, a configuration in which the heater holder is simply formed by a plate member that can be bent and the sheet heater is pressed on the entire surface of the plate member is also conceivable. There is a problem that the adhesion to the curved surface portion is weakened.

  The present invention has been made in view of the above circumstances, and the purpose thereof is not to form the heater presser in a curved shape that is a rigid body and matches the curved shape portion, and in addition to the curved shape portion on the side wall of the inner box. In addition, an object of the present invention is to provide a cooking device that can press the planar heater against the curved surface portion with good adhesion, and can reduce the manufacturing cost and improve the heating efficiency.

  The invention according to claim 1 is provided with an inner box having a heating chamber for containing food in the main body, and a curved surface-shaped portion having a concave inside is formed on at least one side wall of the inner box. A planar heater is disposed on the outer surface of the shape portion, and is composed of a plate-shaped member that can be bent, and has a plurality of convex portions that are convex toward the heating chamber, and the convex heater causes the planar heater to be curved. It is characterized in that a heater presser that presses the outer surface of the part is provided.

  According to the first aspect of the present invention, since the curved portion having a concave inside is formed on at least one side wall of the inner box, the heating by the planar heater is carried out in a convection heating mode so-called stone pot style. The heater press for pressing the planar heater against the outer surface of the curved surface portion is composed of a plate member that can be bent, and has a plurality of convex portions that are convex toward the heating chamber. Since the convex heater is configured to press the planar heater against the outer surface of the curved shape portion, the convex portion of the heater press can be pressed to the planar heater in accordance with the curved surface of the curved shape portion, Moreover, the planar heater can be brought into close contact with the outer surface of the curved shape portion by the convex portion. As a result, the sheet heater can be pressed with good adhesion in accordance with the curved surface shape portion of the side wall of the inner box without the heater press having a curved surface shape along the curved surface shape portion in advance. Heating efficiency can be improved. And the space part of the recessed part which becomes concave relatively with respect to a convex part acts as a heat insulating material, can prevent the heat transfer to other than a heating chamber, and also improves heating efficiency.

  According to the present invention, it is not necessary to form the heater presser in a curved shape that is rigid and matched to the curved shape portion, and the sheet heater is adhered to the curved shape portion according to the curved shape portion of the side wall of the inner box. It can press well, and can reduce manufacturing costs and improve heating efficiency.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. In FIG. 2, the cooking-by-heating machine 1 which abbreviate | omitted the door is shown in the perspective state from the front, and the vertical side structure of the cooking-by-heating machine 1 is shown in FIG. 2 and 3, the main body 2 of the heating cooker 1 is configured by disposing an inner box 4 inside a casing 3 constituting an outer shell, and the inner box 4 includes a heating chamber 5 and the inside. Has been. A door 3a shown in FIG. 3 is provided on the front surface of the housing 3 so as to be openable and closable, and the heating chamber 5 is opened and closed by the door 3a.

  The inner box 4 includes an inner box main body 41 that forms left and right side walls, a back wall, and a bottom wall, and a ceiling plate 42 that forms a ceiling wall. The upper and lower side walls of the inner box main body 41 are formed with flanges 41a and 41b, and the ceiling plate 42 is also formed with flanges 42a and 42b. The flanges 41a and 41b , 42a, 42b are joined by screws 14 and nuts 15 to form the inner box 4.

  The ceiling plate 42 which is, for example, a ceiling wall of the inner box 4 is formed in a curved shape having a concave inside, and a reference numeral 6 is attached to the curved shape portion. In this case, the curved surface shape portion 6 has a shape that curves from the center of the ceiling surface to the left and right side plates 41 c and 41 d that are both side walls of the inner box 4.

Screw insertion holes (not shown) are formed at two locations in the depth direction in the center portion and both end portions of the curved surface-shaped portion 6 and in the middle portion between these center portions and both end portions.
A hot air blowing port 7 and a hot air return port 8 each having a large number of small holes are formed in the inner plate 4 of the inner box 4e. A hot air circulation unit 9 is provided on the back of the back plate 41e. The hot air circulation unit 9 includes a hot air fan 10 and a hot air heater 11. The hot air circulation unit 9 sucks air in the heating chamber 5 from the hot air return port 8 by the centrifugal air blowing action of the hot air fan 10 and blows it into the heating chamber 5 from the hot air blowing port 7. Hot weathering. This hot air circulation unit 9 is suitable for oven cooking.

  A planar heater 12 is laid on the outer surface of the curved surface shape portion 6 in a state of being pressed by a heater presser 13. As shown in FIG. 4, the sheet heater 12 is a single sheet and has a size indicating almost the entire outer surface of the curved surface portion 6. Screw insertion holes 12a are formed at two locations in the center of the planar heater 12, both ends, and an intermediate portion between the center and both ends and in the depth direction.

  As shown in FIGS. 1 and 5, the heater presser 13 is composed of a metal plate-like member that can be bent, and a convex portion 13 a that is convex toward the heating chamber 5 has a central portion and both end portions. These are formed at four locations in the middle and between the two ends. This convex part 13a is formed in the form extended in the depth direction. A screw insertion hole 13b is formed on the front side and the back side of the convex portion 13a.

  The mounting configuration of the planar heater 12 will be described. The planar heater 12 is arranged on the outer surface of the curved surface shape portion 6 as shown in FIG. 4, and the heater holder 13 is arranged on the outer surface of the planar heater 12 so that the convex portion 13a is directed in the depth direction. Then, the heater presser 13 is curved, and the convex portion 13 a is applied to the outer surface of the curved surface portion 6 with the planar heater 12. In this case, since the convex portion 13a extends in the depth direction, which is different from the bending direction, the bending deformation is not hindered.

  Thereafter, the screw 16 that is passed through the inner box 4 through the screw insertion hole of the curved surface portion 6, the screw insertion hole 12a of the planar heater 12, and the screw insertion hole 13b of the heater retainer 13 is tightened with a nut 17. Thus, the planar heater 12 is pressed against the outer surface of the curved surface portion 6 by the convex portion 13a of the heater retainer 13 and attached in the laying state. As a result, the planar heater 12 is in close contact with the outer surface of the curved surface portion 6.

  In the above configuration, at the time of grill cooking in which the planar heater 12 is energized, the planar heater 12 is pressed in close contact with the outer surface of the curved surface portion 6 by the heater presser 13, so that the heat of the planar heater 12 is heated. Good supply into the chamber 5. In this case, since the space 13d of the concave portion 13c that is relatively concave with respect to the convex portion 13a of the heater presser 13 exhibits a heat insulating action, the heat of the planar heater 12 can be applied in the direction of the heating chamber 5. . And since the said curved-surface-shaped part 6 exists in the inner box 4, internal air comes to convect favorably and what is called a stone pot-like heating form is obtained.

Further, when the food in the heating chamber 5 is heated by the hot air circulation action of the hot air circulation unit 9, a hot air circulation form different from the case of the rectangular inner box is obtained, and the heating efficiency is good.
According to the present embodiment, since the curved surface portion 6 having a concave inside is formed on the side wall of the inner box 4, for example, the ceiling plate 4 that is a ceiling wall, heating by the planar heater 12 is performed in the heating chamber 5. The heater press 13 for pressing the planar heater 12 against the outer surface of the curved surface portion 6 is composed of a plate-like member that can be bent. The plurality of convex portions 13a that are convex in the direction of the heating chamber 5 are provided, and the planar heater 12 is pressed against the outer surface of the curved shape portion 6 by the convex portions 13a. Can be pressed by the planar heater 12 in accordance with the curved surface of the curved surface portion 6, and the planar heater 12 can be brought into close contact with the outer surface of the curved surface portion 6 by the convex portion 13 a. As a result, the planar heater 12 can be pressed with good adhesion according to the curved surface shape portion 6 of the inner box 4 without the heater press 13 having a curved shape along the curved surface shape portion 6 in advance. Can be reduced and the heating efficiency can be improved. In addition, the space 13d of the recess 13c that is relatively concave with respect to the protrusion 13a acts as a heat insulating material, and heat transfer to other than the heating chamber 5 can be prevented, which also improves the heating efficiency.

  In this case, according to the present embodiment, the convex portion 13a of the heater retainer 13 is formed in a form extending in the depth direction, which is a direction different from the curved surface direction of the curved surface shape portion 6, so that the heater retainer 13 is curved. The convex portion 13a can be formed in a shape extending long without being obstructed, and the planar heater 12 can be pressed in a long range.

  Further, according to the present embodiment, the planar heater 12 has the screw insertion hole 12a, and the heater presser 13 is screwed to the curved surface portion 6 by the screw 16 passing through the screw insertion hole 12a. Therefore, the movement of the planar heater 12 can be prevented by the screw 16 that screws the heater presser 13.

  6 to 8 show a second embodiment of the present invention, which differs from the first embodiment in the following points. The planar heater is divided into a plurality of, for example, three planar heaters 21A, 21B, and 21C. In this case, the curved surface shape portion 6 is divided in the curved surface direction. For example, two screw insertion holes 22 are formed on the near side and the back side of the center portion in the curved surface direction of these planar heaters 21A, 21B, and 21C (the screw insertion holes of the planar heater 21A are not shown). ) These planar heaters 21A, 21B, and 21C are substantially evenly arranged on the outer surface of the curved surface portion 6 as shown in FIG. Although not shown, screw insertion holes are formed in portions corresponding to the screw insertion holes 22 in the curved surface shape portion 6.

  The heater presser 23 has a convex portion 23a corresponding to the central portion of each of the planar heaters 21A, 21B, and 21C in the curved surface direction, and the convex portion 23a has a screw insertion hole corresponding to each of the screw insertion holes 22. 23b is formed. However, flange portions 23c and 23d are formed at both ends of the heater presser 23, and screw insertion holes 23e and 23e are formed in the flange portions 23c and 23d for passing the screws 14 for joining the inner box. Has been.

  Furthermore, the heat insulating materials 24A to 24D are arranged in the recesses 23f to 23i of the heater presser 23. In this case, each heat insulating material with respect to the height dimension H (see FIG. 8) of the respective recesses 23f to 23i. The thickness dimension in the free state of 24A-24D is large.

  When laying the planar heaters 21A, 21B, 21C on the outer surface of the curved surface portion 6, the planar heaters 21A, 21B, 21C are arranged side by side in the curved surface direction on the outer surface of the curved surface portion 6 as shown in FIG. Then, the heat insulating materials 24A to 24D are arranged on the planar heaters 21A, 21B, and 21C as shown in FIG. 6 (or the heat insulating materials 24A to 24D are accommodated in the respective recesses 23f to 23i of the heater retainer 23). Screws 25 and 14 that pass through screw insertion holes (not shown) of the curved surface shape portion 6, screw insertion holes 22 of the planar heaters 21A, 21B, and 21C, and screw insertion holes 23b and 23e of the heater retainer 23, Tighten with 15. Accordingly, the planar heaters 21A, 21B, and 21C are laid in a state of being pressed by the heater holder 23 onto the outer surface of the curved surface portion 6 through the heat insulating materials 24A to 24D.

  According to the second embodiment, the heat insulating materials 24A to 24D are accommodated in the concave portions 23f to 23i that are concave relative to the convex portion 23a of the heater retainer 23, and the convex portions and 23a and the heat insulating material are arranged. Since the planar heaters 21A, 21B, and 21C are pressed by 24A to 24D, heat transfer to other than the heating chamber 5 can be prevented, and the heating efficiency is further improved.

  Moreover, according to this embodiment, the planar heaters 21A, 21B, and 21C are divided into a plurality in the curved surface direction, and the end portions of the planar heaters 21A, 21B, and 21C in the curved surface direction are pressed by the heat insulating materials 24A to 24D. Therefore, it is possible to prevent the end portions of the planar heaters 21 </ b> A, 21 </ b> B, and 21 </ b> C from being lifted using the heat insulating materials 24 </ b> A to 24 </ b> D.

  In this case, according to this embodiment, since the thickness dimension in the free state of the heat insulating materials 24A to 24D is increased with respect to the height dimension H of the recesses 23f to 23i of the heater retainer 23, the heat insulating materials 24A to 24D are Compressed between the heater presser 23 and the planar heaters 21A, 21B, and 21C. As a result, the planar heaters 21A, 21B, and 21C can be more closely attached to the outer surface of the curved surface portion 6, and the planar heater 21A. , 21B, 21C can be further prevented from lifting.

  Furthermore, according to this embodiment, the heater retainer 23 has a convex portion 23a at the center in the curved surface direction of the planar heaters 21A, 21B, and 21C. The heater retainer 23 is the convex portion 23a, and the screw insertion hole 22 is provided. And the screw 25 passing through 23b is screwed to the curved surface portion 6, so that the sheet heaters 21A, 21B, 21C can be prevented from slipping and the central portion can be prevented from being lifted at the convex portion 23a. .

  In the second embodiment, the heater presser 23 is formed with a convex portion 23a located at the center in the curved surface direction of the planar heaters 21A, 21B, 21C, and screwed at the convex portion 23a. Although the sheet heaters 21A, 21B, and 21C are prevented from being displaced, the screwed portion may be a central portion and the convex portion may be formed at a different portion. In other words, the planar heater may be configured to have a screw insertion hole at least in the center of the curved surface direction, and may be configured to be screwed to the curved surface shape portion with a screw passing through the screw insertion hole. It is possible to prevent the central portion of the surface heater from being lifted.

  FIG. 9 shows a third embodiment of the present invention. This embodiment is different from the second embodiment in the following points. That is, the curved surface portion 6 of the inner box 4 is located at the right end portion of the planar heater 21A, both end portions of the planar heater 21B, and the left end portion of the planar heater 21C, and the outer surface of the curved shape portion 6 is concave. Concave portions 6b and 6b (projecting toward the heating chamber 5) are formed, and the right end of the planar heater 21A, both ends of the planar heater 21B, and the left end of the planar heater 21C are heat insulating materials 24A to 24D. Thus, the concave portions 6b and 6b are pressed against the outer surface. According to the third embodiment, the right end portion of the planar heater 21A, both end portions of the planar heater 21B, and the left end portion of the planar heater 21C are further brought into close contact with the curved surface portion 6 so as not to float. It is possible to further prevent the right end portion of the planar heater 21A, both end portions of the planar heater 21B, and the left end portion of the planar heater 21C from being lifted.

  FIG. 10 shows a fourth embodiment of the present invention, which differs from the second embodiment in the following points. That is, in the concave portions 23g and 23h of the heater retainer 23, convex portions in the direction of the heating chamber 5 are formed at corresponding portions of the right end portion of the planar heater 21A, both end portions of the planar heater 21B, and the left end portion of the planar heater 21C. Since the convex portion 23j is formed, the pressing force of the heat insulating materials 24A to 24D can be increased with respect to the right end portion of the planar heater 21A, both end portions of the planar heater 21B, and the left end portion of the planar heater 21C. The lifting of the end can be further prevented.

  The present invention is not limited to each of the above-described embodiments. For example, the curved surface shape portion is not limited to the ceiling wall of the inner box, and may be formed on other side walls, or curved on a plurality of side walls. A shape portion may be formed. When there are a plurality of curved surface shape portions, the planar heater and the heater presser may be provided on all or one of the plurality of curved surface shape portions.

1 is a longitudinal front view of a planar heater and a heater pressing portion showing a first embodiment of the present invention. Schematic longitudinal front view of the entire cooking device Same vertical profile side view Perspective view of the inner box with a planar heater arranged Perspective view of heater presser FIG. 1 equivalent view showing a second embodiment of the present invention. 4 equivalent figure Figure equivalent to FIG. FIG. 1 equivalent view showing a third embodiment of the present invention. FIG. 1 equivalent view showing a fourth embodiment of the present invention.

Explanation of symbols

  In the drawings, 1 is a heating cooker, 2 is a main body, 4 is an inner box, 5 is a heating chamber, 6 is a curved surface shape part, 9 is a hot air circulation unit, 12 is a planar heater, 13 is a heater presser, and 13a is a convex part. , 13c are recesses, 21A, 21B, and 21C are planar heaters, 23 is a heater presser, 23a is a protrusion, 23f to 23i are recesses, and 24A to 24D are heat insulating materials.

Claims (10)

The main body is equipped with an inner box that is a heating chamber that contains food.
On at least one side wall of the inner box, a curved surface shape part having a concave inside is formed,
A planar heater is arranged on the outer surface of the curved shape part,
It is composed of a plate-like member that can be bent, has a plurality of convex portions that are convex toward the heating chamber, and provided with a heater presser that presses the planar heater against the outer surface of the curved shape portion by the convex portions. A cooking device characterized by.   The heating cooker according to claim 1, wherein the convex portion of the heater presser is formed in a form extending in a direction different from a curved surface direction of the curved surface shape portion.   The heat insulating material is accommodated and disposed in a concave portion that is relatively concave with respect to the convex portion of the heater presser, and the planar heater is pressed by the convex portion and the thermal insulating material. The cooking device described.   4. The sheet heater according to claim 1, wherein the planar heater has a screw insertion hole, and the heater retainer is screwed to the curved surface shape portion by a screw passing through the screw insertion hole. The cooking device described.   The said planar heater has a screw insertion hole in at least a central portion in the curved surface direction, and the heater presser is screwed to the curved surface shape portion with a screw passing through the screw insertion hole. The cooking device according to any one of 1 to 4.   The heater presser has the convex portion at least in the central portion in the curved surface direction of the planar heater, and the convex portion is screwed to the curved surface shape portion with a screw passing through the screw insertion hole. The heating cooker according to claim 4 or 5, characterized in that.   The cooker according to any one of claims 3 to 6, wherein the planar heater is divided into a plurality in the curved surface direction, and ends of the planar heater in the curved surface direction are pressed by the heat insulating material. vessel.   The cooking device according to any one of claims 3 to 7, wherein a thickness dimension in a free state of the heat insulating material is larger than a height dimension of the concave portion of the heater presser.   The curved portion of the inner box is formed with a concave portion that is located at the end of the planar heater and the outer surface of the curved portion is concave, and the end of the planar heater is formed by the heat insulating material. The cooking device according to any one of claims 3 to 8, wherein the cooking device is pressed against the outer surface of the concave portion.   The heating cooker according to any one of claims 3 to 8, wherein a convex portion that protrudes toward the heating chamber is formed at a portion corresponding to the planar heater end in the concave portion of the heater presser.

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