JP2017190898A - Heating cooker - Google Patents

Abstract

The present invention provides a cooking device capable of changing the output of an electric heater without using an expensive noise filter and suppressing the generated noise within a predetermined range.
A cooking device comprising a mesh 4 and a plurality of electric heaters disposed above the mesh and using an AC power source, wherein the plurality of electric heaters includes a first heater whose output cannot be changed; A cooking device comprising a second heater capable of changing an output by controlling a phase related to an output waveform of an AC power supply.
[Selection] Figure 1

Description

  The present invention relates to a cooking device that heats and cooks an object.

  Conventionally, a heating cooker has been proposed that includes a tray into which water is placed, a mesh disposed on the top of the tray, and a plurality of glass tube heaters disposed on the mesh (see, for example, Patent Document 1). The glass tube heater can heat the food placed on the net with a constant output.

JP 2010-112578 A

  In recent years, there has been a demand for a cooking device that can adjust the output of an electric heater such as a glass tube heater in accordance with the characteristics of the food. When a plurality of electric heaters using an AC power source are configured so that the output can be changed steplessly, it is necessary to perform phase control on the plurality of electric heaters.

  When phase control is performed on a plurality of electric heaters, a large noise is generated, but the noise must be suppressed within a range determined by laws such as the Electrical Appliance and Material Safety Law. However, an expensive noise filter is required to suppress the generation of noise within the above range.

  The present invention has been made in view of such circumstances, and heating that can change the output of the electric heater and suppress the generated noise within a predetermined range without using an expensive noise filter. The purpose is to provide a cooker.

  The cooking device according to the present invention includes a net and a plurality of electric heaters arranged above the net and using an AC power supply, wherein the plurality of electric heaters cannot change the output. And a second heater whose output can be changed by controlling the phase of the output waveform of the AC power supply.

  In the present invention, the output of the first heater is not changeable, and the output of the second heater is variable. Since the output of only the second heater is changed, noise generation itself is suppressed.

  The heating cooker according to the present invention has a first opening on the lower side, a concave first reflecting portion that covers the first heater from above, and a second opening on the lower side, and the second heater A concave second reflecting portion covering from above, wherein the first reflecting portion forms at least a part of the first opening, has a plurality of first facing surfaces facing each other, and the plurality of first reflecting portions. The facing distance between the facing surfaces is such that the lower facing distance is equal to or greater than the upper facing distance, and the second reflecting portion forms at least a part of the second opening and is opposed to each other. It has an opposing surface, and the distance between the opposing surfaces of the plurality of second opposing surfaces is such that the lower opposing distance is less than the upper opposing distance.

  In this invention, the 1st opening of a 1st reflection part is opened at a wide angle, and the whole cooking surface of a foodstuff is heated by the output of the predetermined value defined beforehand. On the other hand, the second opening of the second reflecting portion is narrowed to concentrate the heat of the second heater whose output is variable at a specific portion of the food, thereby raising the cooking temperature and finely adjusting the cooking temperature.

  The cooking device according to the present invention is characterized in that an opening area of the first opening is larger than an opening area of the second opening.

  In the present invention, the opening area of the first opening is made larger than the opening area of the second opening so that the heat from the first heater is easily dissipated, and the heat from the second heater is easily concentrated on the food.

  In the cooking device according to the present invention, the cross-sectional shape of the first reflecting portion is a parabolic shape, and the first heater is disposed at a position biased toward the center of the net with respect to the apex of the first reflecting portion. The cross-sectional shape of the second reflecting part is a polygonal shape.

  In the present invention, the cross-sectional shape of the first reflecting portion is made parabolic, and the first heater is arranged closer to the center of the net than the apex of the first reflecting portion, so that the heat from the first heater is not directly below. , Diffused and radiated to the center of the net, and supplied to food on average. Moreover, by making the cross-sectional shape of the second reflecting portion a polygonal shape, the heat from the second heater tends to concentrate on the food.

  In the heating cooker according to the present invention, the output of the first heater cannot be changed, and the output of the second heater is variable. Since the output of only the second heater is changed, noise generation itself is suppressed. Therefore, even an inexpensive noise filter can suppress noise within a predetermined range.

It is an external appearance perspective view which shows a heating cooker. It is a longitudinal cross-sectional view which shows a heating cooker.

  Hereinafter, the present invention will be described based on the drawings showing a cooking device according to an embodiment. FIG. 1 is an external perspective view showing a heating cooker, and FIG. 2 is a longitudinal sectional view showing the heating cooker. In the following description, the top, bottom, front, back, left and right shown in the figure are used.

  The heating cooker includes a flat rectangular housing 1 that is long in the front-rear direction. An opening 2 is formed on the upper surface of the housing 1 between the front end portion and the middle portion of the rear portion. The left-right width of the opening 2 is slightly smaller than the left-right width of the housing 1.

  Inside the opening 2 is formed a rectangular water tray 3 which is long in the front and rear directions for water. The front-rear width and the left-right width of the water tray 3 are substantially the same as the front-rear width and the left-right width of the opening 2. A rectangular net 4 is placed on the upper side of the opening 2. The net 4 is supported at the edge portion of the opening 2.

  Two support columns 5 and 5 protrude upward from the rear end of the housing 1. The two support columns 5 and 5 are arranged in the left-right direction. A heating unit 7 is supported on the protruding end portions of the two support columns 5 and 5. A switch 6 for driving and stopping the heating unit 7 and changing the output of the second heater 12 to be described later is provided at the rear end of the upper surface of the housing 1. The switch 6 has a cylindrical shape that can rotate around the axis, and can rotate the axis around the axis to change the output of the second heater 12 steplessly.

  The heating unit 7 includes a rectangular casing 8 that is long in the front and rear positions above the mesh 4. The front-rear width of the casing 8 is substantially equal to the front-rear width of the net 4, and the left-right width of the casing 8 is shorter than the left-right width of the net 4. The casing 8 is disposed so as to face the central portion in the left-right direction of the net 4. The upper surface of the casing 8 extends substantially horizontally.

  The lower surface of the casing 8 is open, and the first heater 11 and the second heater 12 are housed inside the casing 8. The first heater 11 has a cylindrical shape extending in the front-rear direction and is disposed on the left side of the casing 8. The second heater 12 has a cylindrical shape extending in the front-rear direction and is disposed on the right side of the casing 8.

  The first heater 11 and the second heater 12 are carbon heaters that emit infrared rays and the like to emit heat, and are supplied with electric power by an AC power source. The first heater 11 is turned on or off by driving or stopping the heating unit 7. The output of the first heater 11 is set to a predetermined value in advance, and cannot be changed after the heating unit 7 is driven, that is, after the first heater 11 is turned on. The predetermined value is not limited to a constant value, and includes a predetermined fluctuation range based on the constant value.

  The second heater 12 can change its output. By operating the switch 6, the phase related to the output waveform of the AC power supplied to the second heater 12 is controlled, and the output of the second heater 12 is changed. The casing 8 is provided with a control circuit (not shown) that performs phase control. A noise filter is mounted on the control circuit, and noise generated by execution of phase control is removed by the noise filter. By removing the noise, the noise is suppressed within a range determined by laws such as the Electrical Appliance and Material Safety Law.

  The casing 8 is provided with a reflecting plate 20 that reflects heat. The reflection plate 20 covers the first heater 11 and the second heater 12 from above. The reflecting plate 20 includes a concave first reflecting portion 21 that covers the first heater 11 from above, and a concave second reflecting portion 22 that covers the second heater 12 from above.

  The first reflecting portion 21 has a first opening 21d on the lower side, and has a semicylindrical shape extending in the front-rear direction. As shown in FIG. 2, the 1st reflection part 21 is provided with the curved surface 21c which protruded upwards, and the front cross-sectional shape of this curved surface 21c makes | forms a parabolic shape. First opposing surfaces 21a and 21b that are substantially perpendicular to the upper surface of the casing 8 are formed on the left and right edges of the curved surface 21c. The two first facing surfaces 21a and 21b are opposed to each other in the left-right direction, and form left and right edge portions of the first opening 21d.

  The distance between the left and right opposing surfaces of the two first opposing surfaces 21a and 21b is substantially the same in the entire vertical direction, and the two first opposing surfaces 21a and 21b are parallel to each other. The two first facing surfaces 21a and 21b may be formed so that the front cross-sectional shape is a “C” shape. In this case, the distance between the left and right facings of the two first facing surfaces 21a and 21b is such that the lower facing distance is larger than the upper facing distance.

  The second reflecting portion 22 has a second opening 22f on the lower side, and has a half-square cylindrical shape extending in the front-rear direction. As shown in FIG. 2, the front cross-sectional shape of the second reflecting portion 22 is a deformed hexagonal shape. Two second facing surfaces 22 a and 22 b that face each other are formed on the left and right edges of the second reflecting portion 22, respectively. The second reflecting portion 22 includes a left surface 22c, a right upper surface 22d, and a right surface 22e between the two second opposing surfaces 22a and 22b. The left and right second facing surfaces 22a and 22b form a left edge and a right edge of the second opening 22f, respectively.

  The left surface 22c extends in the upper right direction from the upper end of the left second facing surface 22a and is inclined with respect to the left second facing surface 22a. The left surface 22c is inclined so that infrared rays and the like from the second heater 12 are reflected almost directly below. The right upper surface 22d extends in the lower right direction from the right end of the left surface 22c, and is inclined so that infrared rays and the like from the second heater 12 are reflected toward the center in the left-right direction of the net 4.

  The right surface 22e is provided between the right end of the right upper surface 22d and the upper end of the second opposing surface 22b on the right side. The right surface 22e extends from the right end of the right upper surface 22d to the lower right direction, and infrared rays and the like from the second heater 12 are meshed. 4 is inclined so as to be reflected toward the center in the left-right direction. The inner angle formed by the left surface 22c and the right upper surface 22d and the inner angle formed by the right upper surface 22d and the right surface 22e are both obtuse angles, and the inner angles formed by the right upper surface 22d and the right surface 22e are the left surface 22c and the right surface. It is larger than the inner angle formed by the upper surface 22d. The left surface 22 c faces the right end side of the net 4. On the other hand, both the right upper surface 22d and the right surface 22e face the vicinity of the center of the net 4 in the left-right direction.

  The left second facing surface 22 a is substantially perpendicular to the upper surface of the casing 8. On the other hand, the second opposing surface 22 b on the right side is inclined with respect to the upper surface of the casing 8. The distance between the left and right opposing surfaces of the two second opposing surfaces 22a and 22b is such that the lower opposing distance is less than the upper opposing distance. The distance d2 between the left second opposing surface 22a and the lower end of the right second opposing surface 22b is the distance d3 between the left second opposing surface 22a and the upper end of the right second opposing surface 22b. Shorter than. That is, the lower end portion of the second opposing surface 22 b on the right side is located on the left side of the upper end portion, and the second opening 22 f is formed so as to narrow toward the left and right center of the net 4.

  As shown in FIG. 2, two extension lines L1 and L2 extending downward from the left and right first opposing surfaces 21a and 21b reach the net 4 without crossing each other. On the other hand, the two extension lines L3 and L4 extending downward from the left and right second facing surfaces 22a and 22b intersect slightly above the center of the net 4 in the left-right direction.

  The left and right width d1 of the first reflecting portion 21 is larger than the left and right widths d2 and d3 of the second reflecting portion 22. The lengths in the front-rear direction of the first reflecting portion 21 and the second reflecting portion 22 are substantially the same, and the opening area of the first opening 21d is larger than the opening area of the second opening 22f.

  As described above, the second opening 22f is formed so as to narrow toward the center of the net 4 and toward the center of the left and right. In addition, the left surface 22c of the second reflecting portion 22 is inclined so that infrared rays and the like from the second heater 12 are reflected almost directly below, and the right upper surface 22d has the infrared rays and the like from the second heater 12 of the net 4. The right surface 22e is inclined so that infrared rays and the like from the second heater 12 are reflected toward the vicinity of the center of the net 4 in the left-right direction. Therefore, the heat irradiation range of the second heater 12 is concentrated near the center of the net 4.

  As shown in FIG. 2, the axis of the first heater 11 is arranged at a position slightly deviated to the right side from the perpendicular H perpendicular to the tangent (quasiline) L5 of the apex of the curved surface 21c having a parabolic cross section. Yes. In other words, the axial center of the first heater 11 is arranged at a position biased toward the center side in the left-right direction of the net 4. Since the focal point is located on the vertical line H, the first heater 11 is disposed at a position that is biased toward the center of the net 4 relative to the focal point. Therefore, the radiant heat from the first reflecting portion 21 (curved surface 21c) by infrared rays or the like is irradiated obliquely so as to diffuse from the vicinity of the center of the mesh 4 to the right side, not directly below. The first heater 11 is positioned above the second heater 12, and the heat irradiation range for the net 4 is larger than that of the second heater 12, and the heat is irradiated at a wider angle.

  The user places food on the net 4 and operates the switch 6 to turn on the first heater 11 and the second heater 12. As described above, the heat irradiation range of the first heater 11 is wider than that of the second heater 12, and the first heater 11 irradiates heat at a wide angle and supplies heat to food on average. The second heater 12 supplies heat to food in a concentrated manner, and particularly supplies heat to a portion located near the center of the net 4. Therefore, for example, food that is thick in the center, such as fish, is supplied with heat concentrated in the thick part, and it is possible to suppress the difference in baking conditions between the thick part and the part away from the thick part. Can do.

  Further, by operating the switch 6 in a stepless manner, the output of the second heater 12 is changed and finely adjusted according to the characteristics of the food, for example, the ease of passing fire, the temperature at which the best taste is obtained, etc. Can do.

  In the heating cooker according to the embodiment, the output of the first heater 11 cannot be changed, and the output of the second heater 12 is variable. Since the output of only the second heater 12 is changed, the generation of noise itself is suppressed. Therefore, even an inexpensive noise filter can suppress noise within a range determined by laws such as the Electrical Appliance and Material Safety Law.

  Further, the first opening 21d of the first reflecting portion 21 is opened at a wide angle, and the entire cooking surface of the food is heated by an output having a predetermined value. On the other hand, by narrowing the second opening 22f of the second reflecting portion 22 and concentrating the heat of the variable output second heater 12 on a specific portion of the food, the cooking temperature can be raised and the cooking temperature can be finely adjusted. .

  Further, the opening area of the first opening 21d is made larger than the opening area of the second opening 22f, so that the heat from the first heater 11 is easily dissipated, and the heat from the second heater 12 is easily concentrated on the food.

  Moreover, the cross-sectional shape of the 1st reflection part 21 is made parabolic, and the heat | fever from the 1st heater 11 is directly under by arrange | positioning the 1st heater 11 in the center side of the net | network 4 rather than the vertex of the 1st reflection part 21. Instead, it diffuses and radiates to the center side of the net 4 and is supplied to food on average. Moreover, the heat from the 2nd heater 12 becomes easy to concentrate on a foodstuff by making the cross-sectional shape of the 2nd reflection part 22 into a polygonal shape.

  In addition, you may provide the opposing surface similar to the 1st opposing surfaces 21a and 21b in each front-and-back edge part of the 1st opening 21d. Moreover, you may provide the opposing surface similar to 2nd opposing surface 22a, 22b in each front-and-back edge part of 21 d of 2nd opening.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. 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 modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

4 Net 11 First heater 12 Second heater 20 Reflector 21 First reflector 22 Second reflector

Claims (4)

In a cooking device comprising a net and a plurality of electric heaters disposed above the net and using an AC power source,
The plurality of electric heaters are:
A first heater whose output cannot be changed;
A heating cooker comprising: a second heater capable of changing an output by controlling a phase related to an output waveform of an AC power supply. A concave first reflecting portion having a first opening on the lower side and covering the first heater from above;
A concave second reflecting portion having a second opening on the lower side and covering the second heater from the upper side,
The first reflecting portion has at least a part of the first opening and has a plurality of first facing surfaces facing each other.
The facing distance between the plurality of first facing surfaces is such that the lower facing distance is greater than or equal to the upper facing distance.
The second reflecting portion forms at least a part of the second opening and has a plurality of second facing surfaces facing each other,
2. The cooking device according to claim 1, wherein the distance between the facing surfaces of the plurality of second facing surfaces is such that the lower facing distance is less than the upper facing distance. The cooking device according to claim 2, wherein an opening area of the first opening is larger than an opening area of the second opening. The cross-sectional shape of the first reflecting portion is a parabolic shape,
The first heater is arranged at a position biased toward the center side of the net from the apex of the first reflecting portion,
The cooking device according to claim 2 or 3, wherein a cross-sectional shape of the second reflecting portion is a polygonal shape.

Images