JP7340850B2 - heating cooker - Google Patents

Description

The present technology relates to a cooking device that cooks food using heat from a heater.

BACKGROUND ART Conventionally, a heating cooking device has been proposed in which an oil tray is provided on the bottom of a casing having an open upper side, and heaters are provided on two opposing inner surfaces of the casing. A grill is provided inside the opening. A portion of the grill located approximately directly above the heater is provided with an inclined plate that slopes downward toward the oil pan. The inclined plate extends further toward the center of the housing than the heater. Oil adhering to the screen near directly above the heater is guided to an oil receiving tray by an inclined plate without coming into contact with the heater (see Patent Document 1).

US Patent Application Publication No. 2012/0024166

Oil may splash, and there is a risk that the splashed oil may come into contact with the heater. Further, in recent years, there has been a demand for further miniaturization of heating cookers.

The present disclosure has been made in view of such circumstances, and it is an object of the present disclosure to provide a heating cooker that can suppress adhesion of foreign matter to the heater and promote downsizing.

A heating cooker according to an embodiment of the present disclosure includes a box-shaped casing with an open top surface, a heater disposed along an inner surface of the casing, and a heater disposed between the heater and the casing. a reflective part that reflects the radiant heat of the heater toward the opening; and a protection that faces the heater on the opposite side of the reflective part and allows the radiant heat to pass through to prevent foreign matter from adhering to the heater. The heater includes a heating element in the form of a film having a thickness of 300 micrometers or less, and the protective plate is inclined at an angle of 65 to 75 degrees with respect to the bottom surface of the casing.

In one embodiment of the present disclosure, the guard plate prevents foreign material from migrating to the heater. Furthermore, by using a film-like heating element, the heater can be made small, and by setting the angle of inclination of the protective plate to the bottom of the casing at 65 to 75 degrees, the exclusive area of the protective plate can be limited.

In the cooking device according to an embodiment of the present disclosure, a ventilation path is formed between the protection plate and the reflection section.

In one embodiment of the present disclosure, a ventilation path is formed between the protective plate and the reflective section to promote cooling of the reflective section.

In the heating cooker according to an embodiment of the present disclosure, the reflecting section has a semi-cylindrical shape protruding to the opposite side of the protection plate, and the heater extends along the axial direction inside the reflecting section. , support portions that support the protection plate are provided at both edge portions of the reflection portion along the axial direction, and the ventilation path is formed in a portion of each support portion closer to the heater than the protection plate. and has a ventilation hole penetrating in the radial direction of the reflective part.

In an embodiment of the present disclosure, by forming a ventilation hole in each support part, air entering the inside of the reflection part from one of the ventilation holes moves along the inner circumferential surface of the reflection part, and the air enters the inside of the reflection part from one of the ventilation holes. Exit through the vent. Therefore, the inner circumferential surface of the reflective section heated by the heater can be effectively cooled.

In the cooking device according to an embodiment of the present disclosure, by providing the protective plate, it is possible to prevent foreign matter from moving to the heater and prevent foreign matter from adhering to the heater. In addition, by using a film-shaped heating element, the heater can be made smaller, and by setting the angle of inclination of the protective plate to the bottom of the casing at 65 to 75 degrees, the area occupied by the protective plate can be limited. The entire cooking device can be made smaller.

It is a schematic exploded perspective view of a heating cooker. It is a schematic plan view of the heating cooker excluding the lid and plate. 3 is a schematic longitudinal sectional view taken along the line III-III shown in FIG. 2 as a cutting line. FIG. FIG. 3 is a partially enlarged vertical cross-sectional perspective view schematically showing the configuration of the vicinity of the heater as viewed from below. FIG. 3 is a partially enlarged perspective view schematically showing the configuration of the vicinity of the heater as viewed from above. FIG. 3 is a partially enlarged vertical cross-sectional view schematically showing the configuration near the heater.

The present invention will be described below based on drawings showing a heating cooker 1 according to an embodiment. FIG. 1 is a schematic exploded perspective view of the cooking device 1, and FIG. 2 is a schematic plan view of the cooking device 1 with the lid 7 and plate 6 removed.

The heating cooker 1 includes a casing 2 that is rectangular in plan view and has an opening 2a formed in the upper surface. Two operating units 3, 3 are provided on the outer surface of one side of the housing 2. The user can operate the operation unit 3 to start/stop the heating cooker 1, adjust the temperature, etc. An oil pan 5 is removably provided on the inner bottom surface of the housing 2. A support portion 4 that protrudes toward the inside of the housing 2 is formed over the entire circumference of the inner surface of the housing 2 . The support part 4 is arranged on the upper part of the inner surface.

A dish-shaped plate 6 is arranged inside the casing 2. The plate 6 has a rectangular shape in plan view, and a flange is formed around the entire circumference of the plate 6. The support part 4 supports the collar and supports the plate 6. Note that a net may be provided in place of the plate 6, and the support portion 4 may support the outer peripheral portion of the net. A lid 7 is provided above the plate 6. The user can cook food by placing food on the plate 6 and placing the lid 7 on the plate 6.

3 is a schematic vertical sectional view taken along the line III-III shown in FIG. 6 is a partially enlarged perspective view schematically showing the structure around the heater 9 viewed from above, and FIG. 6 is a partially enlarged longitudinal cross-sectional view schematically showing the structure near the heater 9.

The housing 2 includes two other side surfaces substantially perpendicular to the one side surface on which the operating section 3 is provided. The other side surface extends in a direction substantially perpendicular to the one side surface. Inside the housing 2, reflective sections 10 are provided on the two other side surfaces, respectively. The reflective section 10 is arranged below the support section 4. The reflecting portion 10 has a semi-cylindrical shape, which is obtained by cutting a cylinder along a cutting surface along the axial direction. The reflecting section 10 is arranged such that its outer circumferential surface faces the other side surface and the axis of the reflecting section 10 extends in the longitudinal direction of the other side surface. That is, the reflecting portion 10 protrudes toward the other side surface.

A heater 9 is provided inside the reflection section 10. The heater 9 includes a cylindrical portion 9b extending along the axis of the reflecting portion 10, and a heating element 9a housed in the cylindrical portion 9b. The cylindrical portion 9b is a heat-resistant tube, and is made of, for example, a crystallized glass material with excellent light transmittance or a ceramic material with a high amount of far-infrared radiation.

The heating element 9a has a film shape, and the thickness of the heating element 9a is, for example, 100 micrometers. Although the thickness of the heating element 9a is not limited to 100 micrometers, it is preferably 300 micrometers or less for miniaturization. More preferably, the thickness of the heating element 9a is 80 to 100 micrometers. The heating element 9a includes, for example, a graphite film.

Both ends of the cylindrical portion 9b are sealed, and the inside of the cylindrical portion 9b is filled with an inert gas such as nitrogen gas or argon gas. One end of a lead wire is connected to both ends of the graphite film, and the other end of the lead wire exits from the cylindrical portion 9b and is connected to a drive circuit. A voltage is applied from the drive circuit, and the graphite film generates heat.

By forming the heating element 9a in the form of a film, the dimensions of the heating element 9a itself become smaller than in the case of using a plate-shaped heating element 9a that is thicker than the film, and therefore the dimensions of the cylindrical portion 9b also decrease. becomes smaller. As a result, the overall size of the heater 9 can be reduced.

The protective plate 8 has a rectangular plate shape extending along the axis of the semi-cylindrical reflecting section 10, and closes the opening of the reflecting section 10, in other words, the space between the upper and lower edges of the reflecting section 10. It is arranged like this. The protection plate 8 extends in the axial direction of the reflection section 10 and faces the entire heater 9 . The protection plate 8 is made of a heat-resistant member having light-transmitting properties, and can allow the radiant heat of the heater 9 to pass therethrough. The radiant heat of the heater 9 and the radiant heat emitted from the heater 9 and reflected by the reflecting section 10 reach the plate 6, and the food placed on the plate 6 is heated.

As shown in FIGS. 5 and 6, a first support portion 11 that supports the protection plate 8 is provided at the lower edge portion of the reflection portion 10. As shown in FIGS. The first support portion 11 includes a first plate portion 11a and a second plate portion 11b. The second plate portion 11b has a rectangular shape extending in the axial direction of the reflecting portion 10, and projects downward from the lower edge of the reflecting portion 10. The first plate portion 11a has a rectangular shape extending in the axial direction of the reflecting portion 10, and protrudes toward the inside of the housing 2 from the lower edge of the second plate portion 11b. A plurality of first ventilation holes 11c vertically penetrating are arranged in parallel in the axial direction of the reflecting section 10 at a connection point between the first plate section 11a and the second plate section 11b. The first ventilation hole 11c is formed across the first plate portion 11a and the second plate portion 11b. That is, the first ventilation hole 11c penetrates the reflecting part 10 in the radial direction and is formed in a portion of the first supporting part 11 closer to the heater 9 than the protective plate 8.

A second support portion 12 for supporting the protection plate 8 is provided at the upper edge portion of the reflection portion 10. The second support portion 12 includes a third plate portion 12a and a fourth plate portion 12b. The third plate portion 12a has a rectangular shape extending in the axial direction of the reflecting portion 10, and projects upward from the upper edge of the reflecting portion 10. The fourth plate part 12b has a rectangular shape extending in the axial direction of the reflecting part 10, and protrudes toward the inside of the housing 2 from the upper end of the third plate part 12a. A plurality of second ventilation holes 12c vertically penetrating are arranged in parallel in the axial direction of the reflecting section 10 at the connection point between the third plate section 12a and the fourth plate section 12b. The second ventilation hole 12c is formed across the third plate portion 12a and the fourth plate portion 12b. That is, the second ventilation hole 12c penetrates the reflection section 10 in the radial direction and is formed in a portion of the second support section 12 closer to the heater 9 than the protection plate 8.

As shown in FIG. 5, an L-shaped groove 20 in a plan view having a first surface 21 and a second surface 22 is formed on the inner surface of the housing 2 adjacent to the axial end of the reflecting section 10. . The first surface 21 is a surface substantially parallel to the axial center of the reflecting section 10 , and the second surface 22 is a surface substantially perpendicular to the axial center of the reflecting section 10 . The second surface 22 is located on the opposite side of the reflecting section 10 with the first surface 21 in between. The first surface 21 extends in the vertical direction and is inclined downward toward the inside of the housing 2 at an angle of about 70 degrees with respect to the bottom surface of the housing 2 .

The first surface 21 is adjacent to the first plate portion 11a and the fourth plate portion 12b. In plan view, the first surface 21 and the distal end surface 12d (the surface facing inward of the housing 2) of the fourth plate portion 12b are substantially flush with each other. The distal end surface 11d of the first plate portion 11a is arranged on the inner side of the housing 2 than the first surface 21. In other words, the first plate portion 11a protrudes further inside the housing 2 than the first surface 21.

A lower end portion of the first surface 21 is arranged inside the housing 2 than the second plate portion 11b. In the radial direction of the reflecting part 10, the lower end of the first surface 21 and the second plate part 11b are separated from each other, and the first ventilation hole 11c is arranged between the lower end of the first surface 21 and the second plate part 11b. has been done. In other words, in a plan view, a step is formed between the lower end of the first surface 21 and the second plate portion 11b, and a space 29 is provided. The first ventilation hole 11c communicates this space 29 with a space below the first plate portion 11a.

The second surface 22 projects toward the inside of the housing 2 at a substantially right angle to the first surface 21 . As described above, the distal end surface 11d of the first plate portion 11a protrudes further inside the housing 2 than the first surface 21. In plan view, the lower tip edge 22a of the second surface 22 and the tip surface 11d of the first plate portion 11a protrude toward the inside of the housing 2 to approximately the same position.

The protection plate 8 is supported by the first support part 11 and the second support part 12, and more specifically, the upper surface of the first plate part 11a, the tip surface 12d of the fourth plate part 12b, the first surface 21, and the second surface. 22. Since the protective plate 8 is supported along the first surface 21, it is tilted downward toward the inside of the housing 2 at an angle of approximately 70 degrees with respect to the bottom surface of the housing 2, similar to the first surface 21. do. Since the protection plate 8 is supported by the first surface 21 located inside the housing 2 than the second plate part 11b, when the protection plate 8 is supported by the first support part 11 and the second support part 12, However, the space 29 is ensured between the protection plate 8 and the second plate portion 11b.

The protection plate 8 covers the entire opening of the reflection section 10. A chamber is formed inside the reflecting section 10 by the reflecting section 10 and the protection plate 8 . Hereinafter, this chamber will be referred to as the heater chamber 15. The first ventilation hole 11c connects the heater chamber 15 with a space below the heater chamber 15, and the second ventilation hole 12c connects the heater chamber 15 with a space above the heater chamber 15. Therefore, as shown by the arrow in FIG. 6, air flows from the lower space into the heater chamber 15 through the first ventilation hole 11c and moves upward along the inner circumferential surface of the reflection section 10. Then, it flows out of the heater chamber 15 through the second ventilation hole 12c. The air cools the inner surface of the reflective section 10 that has been heated by the heater 9 .

As shown in FIGS. 4 and 6, a semi-cylindrical lower cover 30 that extends along the axis of the reflecting section 10 covers the lower side of the outer peripheral surface of the reflecting section 10. As shown in FIGS. A space is provided between the lower cover 30 and the reflecting section 10. The lower cover 30 covers the lower side of the first ventilation hole 11c and prevents light from the heater 9 from leaking to the outside from the first ventilation hole 11c. This prevents light leakage and improves the quality of the cooking device 1. The lower cover 30 and the reflecting section 10 are separated from each other, and air between the lower cover 30 and the reflecting section 10 can flow into the heater chamber 15 through the first ventilation hole 11c.

A semi-cylindrical upper cover 31 that extends along the axis of the reflector 10 covers the upper side of the outer peripheral surface of the reflector 10 . The lower part of the upper cover 31 overlaps the upper part of the lower cover 30. At the upper end of the upper cover 31, a projecting portion 31b is formed above the protective plate 8 and projecting further inside the housing 2 than the protective plate 8. The projecting portion 31b extends along the upper edge of the protection plate 8. A plurality of exhaust holes 31a penetrating the protection plate 8 in a direction substantially perpendicular to the protection plate 8 are arranged in parallel along the upper edge of the protection plate 8 in the overhanging portion 31b. The exhaust hole 31a is arranged inside the housing 2 rather than the second ventilation hole 12c.

A cover portion 31c that covers the upper surface of the protection plate 8 and the upper portion of the back surface (the surface facing the heater 9) of the protection plate 8 is provided at the lower end of the overhang portion 31b. A plurality of second exhaust holes 31d are arranged in parallel along the upper edge of the protection plate 8 in the cover portion 31c. The plurality of exhaust holes 31a and the plurality of second exhaust holes 31d are arranged alternately in the direction along the upper edge of the protection plate 8, that is, in the axial direction of the reflection section 10. In other words, a labyrinth structure is formed. Since the exhaust holes 31a and the second exhaust holes 31d are arranged alternately, even if foreign matter, such as oil, enters the exhaust hole 31a, the cover portion 31c prevents the oil from entering the heater chamber 15. This can prevent oil from adhering to the heater 9.

The position of the second exhaust hole 31d in the axial direction of the reflecting section 10 corresponds to the position of the second ventilation hole 12c. The second exhaust hole 31d is arranged substantially directly above the second ventilation hole 12c. Air flowing out of the heater chamber 15 through the second ventilation hole 12c is discharged into the housing 2 through the second exhaust hole 31d and the exhaust hole 31a. The ventilation path includes a space below the heater chamber 15, a first vent hole 11c, an inner space of the heater chamber 15, a second vent hole 12c, a space above the heater chamber 15, and an exhaust hole 31a.

The angle of inclination of the protection plate 8 with respect to the bottom surface of the housing 2 is approximately 70 degrees, but is not limited thereto. However, when considering the minimization of oil splash onto the protection plate 8, the maximization of the dimensions of the oil pan 5, and the minimization of the overall dimensions of the cooking device 1, it is necessary to reduce the exclusive area of the protection plate 8 in plan view. The inclination angle is preferably set in the range of 65 to 75 degrees, more preferably in the range of 68 to 72 degrees.

In the cooking device 1 according to the embodiment, by providing the protection plate 8, it is possible to prevent foreign matter from moving to the heater 9 and prevent foreign matter from adhering to the heater 9. Furthermore, by using the film-like heating element 9a, the heater 9 can be made small, and by setting the inclination angle of the protection plate 8 to the bottom surface of the housing 2 to 65 to 75 degrees, the protection plate 8 can be made smaller in plan view. By limiting the exclusive area, the entire cooking device 1 can be downsized. That is, the synergistic effect of downsizing the heater 9 and limiting the inclination angle of the protection plate 8 promotes downsizing of the cooking device 1 as a whole.

A ventilation path is formed between the protection plate 8 and the reflection section 10, that is, in the inner space of the heater chamber 15, to promote cooling of the reflection section 10. Since the ventilation path passes inside the heater chamber 15, it is possible to cool the inner circumferential surface of the reflecting section 10 that is directly heated by the heater 9, that is, the surface directly facing the heater 9. Since the heater 9 can cool the most heated portion, the safety of the cooking device 1 can be improved.

Further, by forming the first ventilation hole 11c in the first support part 11 and the second ventilation hole 12c in the second support part 12, the inside of the reflection part 10 (heater chamber 15) is provided from the first ventilation hole 11c. The air that has flowed in moves along the inner circumferential surface of the reflecting section 10 and flows out from the second ventilation hole 12c. Therefore, it is possible to effectively cool the inner circumferential surface of the reflecting section 10 heated by the heater 9.

The embodiments disclosed herein are illustrative in all respects and should be considered not to be restrictive. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all changes within the scope of the claims and the range of equivalents to the scope of the claims. be done.

1 Cooking device 2 Housing 8 Protective plate 9 Heater 9a Heating element 10 Reflection part 11 First support part 11c First ventilation hole 12 Second support part 12c Second ventilation hole

Claims (1)

A box-shaped case with an open top,
a heater arranged along the inner surface of the housing;
a reflecting portion that is disposed between the heater and the housing and reflects radiant heat from the heater toward the opening;
a protection plate that faces the heater on the opposite side of the reflection section and allows the radiant heat to pass through to prevent foreign matter from adhering to the heater;
The heater includes a heating element in the form of a film with a thickness of 300 micrometers or less,
The protection plate is inclined at an angle of 65 to 75 degrees with respect to the bottom surface of the casing ,
A ventilation path is formed between the protection plate and the reflection part,
The reflecting portion has a semi-cylindrical shape protruding to the opposite side of the protective plate,
The heater extends along the axial direction inside the reflecting section,
A support portion that supports the protection plate is provided at each of both edge portions along the axial direction of the reflection portion ,
The ventilation path is formed in a part of each support part closer to the heater than the protection plate , and has a ventilation hole that penetrates in the radial direction of the reflection part,
The reflective portion has an upper edge portion and a lower edge portion along the axial direction of the reflective portion,
The support portion has a first support portion formed at a lower edge portion of the reflection portion, and a second support portion formed at an upper edge portion of the reflection portion,
The first support portion has a second plate portion that protrudes downward from the lower edge of the reflective portion, and a first plate portion that protrudes from the second plate portion toward the inside of the casing,
The upper surface of the first plate supports the lower edge of the protection plate,
The second support portion has a third plate portion that protrudes upward from the upper edge of the reflective portion, and a fourth plate portion that protrudes from the third plate portion toward the inside of the casing,
The distal end surface of the fourth plate portion supports one surface of the protection plate,
A support surface that supports one surface of the protection plate is formed on the outside of the axial end of the reflection part so as to be flush with the tip surface of the fourth plate part,
The distal end surface and the support surface of the fourth plate portion are located inside the housing than the second plate portion and the third plate portion,
A first space is formed between the protection plate and the second plate part,
A second space is formed between the protection plate and the third plate part,
The ventilation hole is formed in the first support part and connects the first space with a space below the first space; a second ventilation hole that communicates the second space with a space above the second space;
Heating cooker.

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