JP4889372B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to a built-in induction heating cooker.

  As a conventional built-in induction heating cooker, there is one in which the bottom surface located on the fan motor unit suction side is located below the bottom surface of the fan motor unit support (see, for example, Patent Document 1).

JP-A-10-199668 (first page, FIG. 1)

  In a kitchen built-in induction heating cooker, a thin induction heating cooker has been demanded in order to increase a space such as an oven and a drawer disposed in a lower space of the induction heating cooker. Since the casing contains heavy components such as a heating coil for generating a high-frequency current to the load and a heat sink for cooling the heating element, if the casing is made thin, the strength becomes insufficient. Since the body is likely to be distorted and glass generally used as a top plate (top plate) may be broken, there is a problem that the product is difficult to hold and difficult to carry during installation. In the invention described in Patent Document 1, the casing is not thin, but the rear lower part of the casing protrudes downward. However, it does not compensate for the lack of strength on the front side, and is different from those for improving portability and installation workability.

  The present invention has been made to solve the above-described problems of the prior art, and even if the casing is thinned and reduced in weight, the top plate is difficult to break, and is easy to carry and has improved installation workability. It aims to provide an induction heating cooker with built-in kitchen.

An induction heating cooker according to a first aspect of the present invention includes a casing in which devices for induction heating of a cooking utensil are accommodated, and a top plate on which the cooking utensil provided on the upper surface of the casing is placed. In the built-in induction heating cooker, the casing is formed in a thin portion on the front side from the center, and the depth direction dimension is larger than the center on the rear lower part of the casing. A reinforcing structure portion having a step portion capable of handling the dimension in the depth direction is provided at the bottom portion between and the front side surface of the step portion is formed in an uneven shape protruding in the front direction. .
An induction heating cooker according to a second aspect of the present invention includes a casing in which devices for induction heating of a cooking utensil are accommodated, and a top plate on which the cooking utensil provided on the upper surface of the casing is placed. In the built-in induction heating cooker, the casing is formed in a thin portion on the front side from the center, and the depth direction dimension is larger than the center on the rear lower part of the casing. A reinforcing structure portion having a step portion that can handle a dimension in the depth direction is provided at the bottom between the two and the reinforcing structure portion is detachably provided.
An induction heating cooker according to a third aspect of the present invention includes a casing in which devices for induction heating of a cooking utensil are accommodated, and a top plate on which the cooking utensil provided on the upper surface of the casing is placed. In the built-in induction heating cooker, the casing is formed in a thin portion on the front side from the center, and the depth direction dimension is larger than the center on the rear lower part of the casing. A reinforcing structure portion having a step portion capable of handling a dimension in the depth direction is provided at a bottom portion between the heating coil housed in the thin portion and a power input portion disposed at the lower back of the reinforcing structure portion. A casing made of a metal material is arranged on the connecting straight line.

In the first aspect of the invention, the depth dimension in the rear lower part of the housing is larger than the center part side, and the depth dimension can be handled in the bottom part between the center part side and the front side. side by providing the reinforcement structure that a stepped portion formed in concavo-convex protruded in the forward direction is formed, is insufficient strength and is resolved to prevent distortion of the housing, moreover, grippable stage Easy to carry by some parts, improving installation workability.
In the second aspect of the invention, the depth dimension in the rear lower part of the housing is larger than that in the central part side, and the depth dimension can be handled in the bottom part between the central part side and is removable. By providing the reinforcement structure provided in the case, the distortion of the case is prevented and the lack of strength is eliminated, and the reinforcement structure is provided in a detachable manner so that the thin part of the case and the reinforcement structure Are manufactured separately, and the reinforcing structure is assembled to the housing at the final stage of the assembly process, thereby facilitating the manufacture of the product and improving the productivity.
In the third aspect of the invention, there is a step portion at the rear lower portion of the housing that has a depth dimension larger than that of the central portion side, and a depth portion that can handle the depth direction dimension between the bottom portion and the central portion side. By providing the formed reinforcing structure part, the casing is prevented from being distorted and insufficient strength is eliminated, and the heating coil housed in the thin part and the power source disposed at the lower back of the reinforcing structure part By arranging the casing made of metal material on the straight line connecting the input section, the casing made of metal material plays the role of a shield plate, greatly reducing the leakage magnetic flux noise leaking to the commercial power line The shield plate, which has been necessary in the past, can be eliminated, and a small noise filter having a low noise removal capability can be used.

Embodiment 1 FIG.
1 to 7 are diagrams for explaining an embedded induction heating cooker according to Embodiment 1 of the present invention. FIG. 1 is a perspective view showing an external appearance, and FIG. 2 (a) is an induction heating cooker of FIG. 2 (b) is a side view showing a modification of FIG. 2 (a), FIG. 3 is a front view showing a state where the side portion is grasped with both hands, and FIG. 4 (a) is FIG. 2 (a). 4) is a side view showing the state of gripping the rear part of the induction heating cooker, FIG. 4 (b) is a side view showing the state of gripping the rear part of the induction heating cooker of FIG. 2 (b), and FIG. FIG. 6 is a diagram for conceptually explaining a kitchen frame assembling method, and FIG. 7 is a diagram for explaining a lower space of the built-in induction heating cooker. Note that the same reference numerals denote the same or corresponding parts throughout the drawings.

  In the figure, a built-in induction heating cooker 1 cools a heating coil for induction heating a cooking utensil as a load, an inverter device for driving the heating coil, and a heating member such as the heating coil and the inverter device. It comprises a casing 2 in which devices (not shown) including a cooling fan are accommodated, and a top plate 3 on which a cooking utensil provided on the upper surface of the casing 2 is placed. The main part of the housing 2 including the central part and the front side is formed as a thin part 21, and the reinforcement formed in the rear lower part has a dimension in the depth direction larger or thicker than the thin part 21 on the central part side. A structure portion (thick portion) 22 is provided, and a stepped portion 4 that can be gripped is formed at the bottom between the center portion side. The reinforcing structure portion 22 contributes to securing the strength of the thin portion 21, particularly the bending strength in the width direction, and is configured to be able to hold the step portion 4 formed between the thin portion 21 and the clue.

  The shape of the stepped portion 4 is a vertical surface 22a formed at the boundary between the thin portion 21 and the reinforcing structure portion 22 in FIGS. 1 and 2A, but is not particularly limited thereto. It may be formed by the inclined surface 22b or the like as in the modification shown in 2 (b). In these examples, the lateral width of the reinforcing structure portion 22 is configured to be the same as that of the thin portion 21, but may be narrower than the thin portion 21. Note that the strength, size, and shape of the reinforcing structure 22 are determined according to the arrangement, weight balance, and the like of the heavy components housed in the housing 2. Moreover, although the height of the thin part 21 is not specifically limited, For example, it can be set to about 4-6 cm. In that case, for example, components having a height that cannot be accommodated by the dimension of the thin portion 21 can be accommodated inside the reinforcing structure portion 22. It does not matter.

  Next, the operation of the first embodiment configured as described above will be described. FIG. 3 is a view of the state in which both sides of the thin portion 21 of the induction heating cooker 1 shown in FIG. The strength of the thin portion 21 of the housing 2 is increased by the reinforcing structure portion 22, and the bending that occurs in the housing 2 can be reduced even when the side portion of the thin portion 21 is grasped by hand and carried. Moreover, the induction heating cooking appliance 1 can also be hold | gripped and carried using the step part 4 of the reinforcement structure part 22 like Fig.4 (a) or FIG.4 (b). By grasping the reinforced structure portion 22 that can be held in this way, the housing 2 can be carried more safely without bending or unnecessary stress. Also, as shown in FIG. 3, when the two sides of the housing 2 are held and carried with both hands, it is very difficult to carry when passing through a narrow place, but in this embodiment 1, the induction heating cooker 1 is as shown in FIG. Since the reinforcing structure 22 can be held and held, it can be easily passed through a narrow place. In addition, since the product can be held with one hand, other work can be performed simultaneously with transportation such as opening the door while holding the product.

  FIG. 5 is a side view when the induction heating cooker 1 shown in FIG. 1 is placed on the floor surface 5. Since the rear side of the housing 2 is raised by the reinforcing structure portion 22, a gap S is formed between the floor surface 5 and the induction heating cooker 1. Thereby, even when a product is placed on the floor surface 5, it is possible to put a hand in the gap S, so that the induction heating cooker 1 can be easily lifted from the floor surface 5. FIG. 6 is a diagram for explaining a method of incorporating the built-in induction heating cooker 1 shown in FIG. 1 into the kitchen frame 6. The induction heating cooker 1 is installed so as to drop into the kitchen frame 6. When installing, the housing 2 of the induction heating cooker 1 is put in the opening of the kitchen frame 6, the front end 3 a of the top plate 3 is hooked on the front edge 6 a of the kitchen frame 6, and the induction heating cooker 1 is The side is dropped into the rear edge 6b. At this time, the step 4 at the boundary between the thin portion 21 and the reinforcing structure portion 22 is caught in the hand, serves as a slip stopper, and the installation operator's hand does not slip. .

  FIG. 7 is a view for explaining a lower space formed when the induction heating cooker 1 shown in FIG. 1 is incorporated into a kitchen frame. As what is arrange | positioned under the induction heating cooking appliance 1, there exist an oven, a roaster, etc. Currently, the oven or roaster is required to have a high height H in the cooking chamber 7. In the induction heating cooker 1 according to the first embodiment, the front side of the central portion is formed in the thin portion 21, so that the height H is set on the front side in the cooking chamber 7 that is frequently used when cooking in an oven or roaster. You can have enough. Further, the reinforcing structure 22 is arranged in a dead space where the use frequency of the rear side in the cooking cabinet 7 is low and is hardly used. Therefore, the induction heating cooker 1 according to Embodiment 1 can effectively use the space below.

  As described above, according to the first embodiment, the front side of the center portion of the housing 2 is the thin portion 21 having a thin structure, and the step portion 4 is formed at the rear end portion of the housing 2. By providing the gripping reinforcing structure 22, the strength of the housing 2 including the thin portion 21 is improved, the bending of the housing 2 is reduced, and insufficient strength is eliminated. Therefore, there is no possibility that the top plate 3 will break even if the side end of the housing 2 is held and transported with both hands. Furthermore, since the reinforcing structure 22 that can be gripped can be lifted by hand, the induction heating cooker 1 can be easily carried and the installation workability can be improved.

Embodiment 2. FIG.
8 and 9 are diagrams for explaining an induction heating cooker according to Embodiment 2 of the present invention. FIG. 8A is a first example in which the shape of the step portion is changed, and FIG. FIG. 9 is a side view showing a state where the top plate of the induction heating cooker of FIG. 8A is placed on the floor surface. In the second embodiment, the front side (left side in the figure) side surface of the step portion 4 formed on the lower surface between the reinforcing structure portion 22 and the thin portion 21 has a lower end portion protruding forward in the first example. In the second example, it is formed into a convex-shaped unevenness 22d. Other configurations are the same as those of the first embodiment.

  In the second embodiment configured as described above, the front side (left side in the figure) side surface of the stepped portion 4 is formed in the unevenness 22c or 22d, so that, for example, the unevenness 22c or 22d portion It is possible to hang a finger. Further, even when the top plate 3 is placed downward as shown in FIG. 9, the casing 2 can be grasped by using the unevenness 22c as a clue. For this reason, in addition to the effect of the first embodiment, it is easier to lift the product. This makes it easier to carry and further improves installation workability.

Embodiment 3 FIG.
FIG. 10 is a side view for explaining an induction heating cooker according to Embodiment 3 of the present invention. In the figure, a reinforcing structure part (thick part) 23 is detachably attached to the rear end part of the thin part 21 by a fastener (not shown) such as a screw at the rear end part of the casing 2 formed of the thin part 21. Is provided. If a step is provided on the bottom surface of the housing 2 from the beginning in the manufacture of the product, an additional jig may be required to keep the top plate 3 horizontal, resulting in poor productivity. In the third embodiment, since the reinforcing structure 23 forming the stepped portion 4 is detachable, the thin-thick portion 21 having a flat bottom surface and the reinforcing structure 23 without the reinforcing structure 23 are separately manufactured and assembled. By assembling the reinforcing structure 23 at the final stage of the process, the product can be manufactured easily, and the productivity can be improved. The reinforcing structure 23 may be a simple reinforcing material or may serve as a cover for a built-in component.

Embodiment 4 FIG.
FIG. 11 is a side view conceptually illustrating an induction heating cooker according to Embodiment 4 of the present invention. In the figure, the commercial power line 9 that is input to the induction heating cooker 1 with respect to the heating coil 81 disposed in the front upper portion of the thin portion 21 is a power source disposed at the lower back of the reinforcing structure portion 22. The casing 2 is drawn out from the input unit 91, and the casing 2 is made of a general metal material such as an iron plate or a stainless plate. It is necessary to remove the noise generated in the induction heating cooker 1 so that the noise generated in the induction heating cooker 1 is transmitted through the commercial power line 9 and does not affect other devices. Therefore, a noise filter and a shield plate are necessary. Examples of noise generated in the induction heating cooker 1 include leakage magnetic flux noise generated from the heating coil 81 and switching noise generated by an inverter device (not shown) that converts a commercial power supply frequency to a high frequency.

  In the fourth embodiment, the power input unit 91 of the commercial power supply line 9 is arranged at the lower back of the reinforcing structure unit 22 constituting the housing 2 as shown in FIG. In the middle of a line N that connects the heating coil 81 and the power supply input portion 91 of the commercial power supply line 9 in a straight line, shielding surfaces formed of a metal material constituting the housing 2 are provided at three locations A, B, and C. Will exist. For this reason, since the housing | casing 2 formed with the metal material plays the role of a shield plate, the leakage magnetic flux noise leaking to the commercial power line 9 can be greatly reduced, and the conventionally required shield plate becomes unnecessary. In addition, an effect is also obtained that a small noise filter having a small noise removal capability can be used.

Embodiment 5 FIG.
FIG. 12 is a side view conceptually illustrating an induction heating cooker according to Embodiment 5 of the present invention. In the fifth embodiment, a heating coil 81 and an inverter device 82 for driving the heating coil 81 are provided in the thin portion 21 of the housing 2, and a noise filter is provided at the bottom of the reinforcing structure portion 22 at the rear end of the housing 2. 83 is housed. Other configurations are the same as those in the fourth embodiment. As described above, the induction heating cooker requires a noise filter in order to remove noise transmitted to the commercial power line. A large amount of heat is generated in the heating coil 81 and the inverter device 82. If the induction heating cooker 1 as a whole has a uniform thin structure, the heating coil 81, the inverter device 82, and the noise filter 83 have a planar configuration, and the noise filter 83 receives noise from the heat generated by the heat generating components and generates noise. The removal ability is reduced.

  Therefore, the noise filter 83 requires a large filter with high noise removal capability. In addition, the noise filter 83 is required to have a larger noise removal capability because the noise removal capability is lowered due to the influence of the leakage magnetic flux from the heating coil 81. On the other hand, in the fifth embodiment, the noise filter 83 is disposed at the bottom of the reinforcing structure 22 as shown in FIG. The noise filter 83 is disposed on a different surface from the heat-generating component, and is less likely to receive heat from the heat-generating component. In addition, since the leakage magnetic flux from the heating coil 81 is shielded by the housing surface formed of a metal material, the noise filter 83 is hardly affected by the leakage magnetic flux. Therefore, according to the fifth embodiment configured as described above, since the noise filter 83 is shielded from heat and leakage magnetic flux, a small filter having a small noise removal capability can be used. It can be obtained inexpensively.

Embodiment 6 FIG.
FIG. 13 is a side view conceptually illustrating an induction heating cooker according to Embodiment 6 of the present invention. In the sixth embodiment, an inverter device 82 for driving the heating coil 81 is accommodated in the internal space of the reinforcing structure portion 22. Other configurations are the same as those in the fourth embodiment. Although a large amount of heat is generated in the heating coil 81 and the inverter device 82, in the sixth embodiment, since the two heat generating members are arranged apart from each other, the heat generating portions are dispersed, so that local heat generation inside the housing is performed. Can be improved, and cooling and heat dissipation can be improved. Moreover, since the interference between the magnetic flux generated by the heating coil 81 and the switching noise generated by the inverter device 82 can be suppressed, it is also possible to suppress the generation of a beat sound that is uncomfortable for the user.

  In the description of each of the above embodiments, the case where the thin portion 21 is formed with a uniform depth (height) is illustrated, but the present invention is not limited to this. It may be formed with a convex portion or the like. Of course, both the inverter device 82 and the noise filter 83 may be accommodated in the reinforcing structure 22, for example.

The perspective view which shows the external appearance of the induction heating cooking appliance by Embodiment 1 of this invention. (A) is a side view of the induction heating cooker of FIG. 1, (b) is a side view which shows the modification of FIG. 2 (a). The front view which shows the state which grasped both sides of the thin part of the induction heating cooking appliance shown in FIG. 1 with both hands. (A) is a side view showing a state where the rear part of the induction heating cooker of FIG. 2 (a) is gripped, (b) is a side view showing a state where the rear part of the induction heating cooker of FIG. 2 (b) is gripped. The side view at the time of placing the induction heating cooking appliance of FIG. 1 on a floor surface. The figure which illustrates notionally the kitchen frame incorporation method of the induction heating cooking appliance of FIG. The figure explaining the lower space of the induction heating cooking appliance of FIG. It is a figure explaining the induction heating cooking appliance by Embodiment 2 of this invention, (a) is the 1st example which changed the shape of the step part, (b) is a side view which shows a 2nd example, respectively. The side view which shows the state which put the top plate of the induction heating cooking appliance of Fig.8 (a) on the floor surface. The side view explaining the induction heating cooking appliance by Embodiment 3 of this invention. The side view which illustrates notionally the induction heating cooking appliance by Embodiment 4 of this invention. The side view which illustrates notionally the induction heating cooking appliance by Embodiment 5 of this invention. The side view which illustrates notionally the induction heating cooking appliance by Embodiment 6 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Induction cooking device, 2 Case, 21 Thin part, 22, 23 Reinforcement structure part (thick part), 22a Vertical surface, 22b Inclined surface, 22c Concavity and convexity (L shape), 22d Concavity and convexity (convex shape), 3 Top plate, 3a front end, 4 steps, 5 floor, 6 kitchen frame, 6a front edge, 6b rear edge, 7 cooking cabinet, 81 heating coil, 82 inverter device, 83 noise filter, 9 commercial power line, 91 Power input section, S clearance.

Claims (5)

In a built-in induction heating cooker provided with a casing in which appliances for induction heating of cooking utensils are housed and a top plate on which the cooking utensils provided on the upper surface of the casing are placed, the casing body are formed in the thin portion by the front end of the center portion, the rear lower portion of the housing, larger than the dimension in the depth direction central portion, and a depth dimension on the bottom between the central portion An induction heating cooker characterized in that a reinforcing structure portion having a stepped portion is provided, and a front side surface of the stepped portion is formed in a concavo-convex shape protruding forward . In a built-in induction heating cooker provided with a casing in which appliances for induction heating of cooking utensils are housed and a top plate on which the cooking utensils provided on the upper surface of the casing are placed, the casing The body is formed in a thin part on the front side from the center part, and the depth direction dimension is larger than the center part side at the rear lower part of the housing, and the depth direction dimension is at the bottom part between the center part side. the reinforcement structure with the potential and the step portion worked provided, induction cooker you wherein said reinforcement structure is provided detachably. In a built-in induction heating cooker provided with a casing in which appliances for induction heating of cooking utensils are housed and a top plate on which the cooking utensils provided on the upper surface of the casing are placed, the casing The body is formed in a thin part on the front side from the center part, and the depth direction dimension is larger than the center part side at the rear lower part of the housing, and the depth direction dimension is at the bottom part between the center part side. A case made of a metal material on a straight line connecting a heating coil housed in the thin portion and a power input portion disposed at the lower back of the reinforcing structure portion, provided with a reinforcing structure portion having a stepped portion that can be handled. An induction heating cooker characterized in that is arranged . The induction heating cooking according to any one of claims 1 to 3 , wherein a heating coil and an inverter device that accommodates the heating coil are accommodated in the thin portion, and a noise filter is accommodated in the reinforcing structure portion. vessel. The induction heating cooker according to any one of claims 1 to 3 , wherein a heating coil is accommodated in the thin portion, and an inverter device for driving the heating coil is accommodated in the reinforcing structure portion.

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