JP2003139336A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispose a light source for lighting the inside of an oven in a heating chamber in an arbitrary position. SOLUTION: A light emitting element 1 faces to the inside 4 of the oven of a heater so as to be used as the lighting for the inside 4 of the oven as the long-life light source without any need of replacement. This constitution can provide a free disposition and an appropriate flashing control.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an interior lamp for illuminating the inside of an oven (heating chamber) of a cooking device and a lighting method.

[0002]

2. Description of the Related Art Conventionally, a heater such as a microwave oven has an internal lamp for making it easier to see the heating state of an object to be heated placed in an oven, and an incandescent light bulb that is turned on by a commercial power supply voltage is used as an oven lamp. Was used. For example, as shown in FIG. 9, an oven provided between the punching hole 6 and the air guide 13 which is a path for intake and exhaust provided in the wall surface of the oven of the microwave oven and the air guide 13 which constitutes the path for intake and exhaust, are arranged facing the punching hole. The lamp 12 was arranged to illuminate the object to be heated 11 in the oven chamber. In the microwave oven, the inside of the oven can be viewed through a plurality of small holes such as punching holes to prevent microwave leakage from the oven. Therefore, the oven lamp is arranged as the interior lamp through the punching hole.

[0003]

However, in the conventional method, as shown in FIG. 10, the position where the oven lamp is arranged is such that the oven upper plate 10 has a shape protruding upward to widen the internal volume of the oven. If the space a between the body and the body 14 is narrow, the oven lamp cannot be arranged.
Since it has a life of about 000 hours, there is a restriction that the oven lamp is arranged at a place where it can be replaced. Therefore, for example, effective production such as illuminating the object to be heated 11 from directly above or illuminating it from the front has not been possible with the above-described conventional configuration.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide a method of illuminating from a position that cannot be realized by the conventional method.

[0005]

In order to solve the above-mentioned conventional problems, in the heater of the present invention, a light-emitting element which has a long life and does not need to be replaced is used for lighting the interior of the oven, and the heater is arranged at a position facing the interior of the oven. It has a structure.

[0006]

The invention according to claim 1 is such that a heating chamber for heating an object to be heated, a light emitting element, and the light emitting element are arranged on the wall surface of the heating chamber, and the light emitting element is used in the heating chamber storage. By illuminating, the quantity, shape, and position of the light-emitting elements are set according to the volume inside the cabinet.

According to a second aspect of the present invention, an oven is provided with a light emitting unit which faces the oven (heating chamber) of a heater and is mounted with a light emitting element on a printed circuit board or the like so that it can be turned on to obtain a predetermined brightness. The number of light-emitting elements depends on the volume of the interior, etc.
Set the shape and position.

According to a third aspect of the present invention, the optical axis of the light emitting element is made to face a punching hole provided in the wall surface of the oven or the like, and the light emission directivity of the light emitting element is appropriately selected to enhance the light emission transmittance. It maximizes the brightness of.

According to the fourth aspect of the present invention, the progress of heating is visually expressed by blinking or dimming in association with the progress of heating in the heating chamber.

According to a fifth aspect of the present invention, a plurality of units each having a light emitting element as a light source are provided, and a lighting condition can be changed under preset conditions or arbitrarily.

According to a sixth aspect of the present invention, the light emitting element is incorporated in the door and the interior of the oven is illuminated so that the object to be heated is illuminated from a position near the front of the oven.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

1 (a) and 1 (b) show the first embodiment of the present invention.
FIG. 3 is a perspective view and a detailed view showing a configuration in which an LED (light emitting diode) is arranged as a light emitting element in an oven interior lighting of a microwave oven as a heater in the embodiment of FIG. Figure 1
In (a), the light emitting unit 3 is provided on an oven wall surface 5 facing the inside 4 of the microwave oven. The light emitting unit 3 is 7000 mc as shown in FIG.
The white LED 1 of d is used as a light emitting element. Four of these are arranged on the printed circuit board 2 as the light emitting unit 3 and are arranged on the opening surface formed by the punching holes 6 provided in the oven wall surface 5. Punching holes are provided with a plurality of holes having a diameter of 3 mm so that microwaves do not leak during heating in a microwave oven, and the interior of the oven can be illuminated with an aperture ratio of about 20%. With this configuration, it is possible to place it if there is a gap of about 10 mm from the oven surface, so it is possible to illuminate from a slight gap sandwiched between the oven and the body.

The LED has the same brightness as that of an incandescent light bulb.
It can be arranged with a power consumption of about 9 and an occupied space of 1/100 or less. Further, since each LED can be turned on at a voltage of about 4 V, it can be easily driven by the control circuit of the microwave oven. It has a life of 100,000 hours and practically does not require replacement.

FIG. 2 is a side view showing a structure in which an LED is arranged in the oven interior lighting of the microwave oven according to the second embodiment of the present invention. In FIG. 2, the LED 1 has its light emission optical axis facing the punching hole 6 and the opening ratio into the oven chamber as seen from the LED is close to 100%. It is possible to illuminate the inside of the oven that is not affected by.

FIG. 3 is a time chart showing the change of the brightness of the LED when the LED is used for the interior lighting of the oven of the microwave oven according to the third embodiment of the present invention, and shows the progress of the heating program of the microwave oven. Correspondingly, at the beginning, it lights up at normal brightness, blinks slowly before the end of heating, and blinks quickly just before the end. This allows the progress of heating to be visually recognized. The start timing and interval of this blinking can be set arbitrarily.

FIGS. 4 (a) and 4 (b) are perspective views showing a structure in which light emitting units are arranged at a plurality of positions in the oven interior lighting of the microwave oven according to the fourth embodiment of the present invention. In this embodiment, a light emitting unit A7 and a light emitting unit B6 are arranged on the upper surface of the oven cabinet and on the front side of the bottom surface of the oven, and the objects to be heated in the oven cabinet are illuminated from above and in the front, respectively, as in the second embodiment. Each LED is arranged so as to face the punching hole 6. When the door of the microwave oven is opened, the interior of the refrigerator is illuminated from above, and after the door is closed and the heating program is started, the interior of the refrigerator is illuminated to provide a visual effect.

FIGS. 5 (a) and 5 (b) show a structure in which a light emitting unit using an LED as a light source is arranged inside a door as an oven interior lighting of a microwave oven according to a fifth embodiment of the present invention. It is a perspective view. In this embodiment, the light emitting unit C 9 is arranged above and below the in-house peep screen portion in the center of the door, and the object to be heated 11 in the oven compartment is illuminated almost from the front, as in the second embodiment. The LEDs of the light emitting unit C are arranged so as to face the punching holes 6 of the door constituent members.

FIG. 6 is a side view of a structure in which a light emitting unit is arranged above an oven as a feature of the present invention in relation to the first embodiment. In FIG. 6, a light emitting unit 3 having an LED as a light source is an oven upper plate 1 having a shape protruding upward.
It is placed in a narrow gap of about 10 mm sandwiched between 0 and the body 14, and can be illuminated from just above the object to be heated 11.

FIG. 7 is a circuit configuration diagram when four LEDs are arranged in series. Forward voltage VF of white LED is 4V
Since it is about the same level, a constant current diode CRD is further connected in series to obtain illumination of uniform brightness with a power supply of about 20V. Since it can be turned on or off by the control transistor Q, any blinking is possible.

FIG. 8 is a diagram relating to the second embodiment and showing the light emitting directivity of the LED. Punching is performed by using an LED having a narrow directivity of about 30 degrees from the optical axis of the LED for the light emitting unit. The inside of the oven chamber can be illuminated without the illumination being blocked by the hole 4.

[0022]

As described above, according to the invention described in claims 1 to 6, by using a light emitting element such as an LED as a light source for illuminating the inside of the oven of the heater, the heater is arranged facing the oven. In addition, it is possible to illuminate the oven from an appropriate position without restrictions on physical shape or replacement life, and it is possible to realize interior lighting with low power consumption and excellent performance.

[Brief description of drawings]

FIG. 1 is a perspective view showing an arrangement and a configuration of a light emitting unit according to a first embodiment of the present invention.

FIG. 2 is a side view showing a relationship between a light emitting element and punching holes in Embodiment 2 of the present invention.

FIG. 3 is a time chart showing the brightness of an LED in Example 3 of the present invention.

FIG. 4 is a perspective view showing a configuration in which LEDs are arranged at a plurality of points in a fourth embodiment of the present invention.

FIG. 5 is a perspective view showing a configuration in which LEDs are arranged on a door according to a fifth embodiment of the present invention.

FIG. 6 shows L on the upper surface of the oven in connection with Example 1 of the present invention.
Side view showing a configuration in which EDs are arranged

FIG. 7 is a configuration diagram showing wiring of a plurality of LEDs in relation to an embodiment of the present invention.

FIG. 8 is a diagram showing the emission directivity of an LED in relation to Example 2 of the present invention.

FIG. 9 is a perspective view showing a configuration in which conventional microwave oven interior lighting is arranged.

FIG. 10 is a side view showing a void on the upper surface of the oven in a configuration in which an oven lamp is arranged from the side of a conventional microwave oven interior lighting.

[Explanation of symbols]

1 LED (light emitting element) 2 printed circuit boards 3 light emitting unit 4 Inside the oven (heating room) 13 doors

Claims (6)

[Claims] 1. A cooking device comprising: a heating chamber for heating an object to be heated; a light emitting element; and the light emitting element disposed on a wall surface of the heating chamber, and the light emitting element illuminates the interior of the heating chamber. 2. A cooking device, characterized in that a light emitting unit using a light emitting element as a light source is arranged facing the inside of the heating chamber, and the inside of the heating chamber is illuminated by the light emitting unit. 3. The cooking device according to claim 1, wherein the light emitting element is arranged so as to face a punching hole provided facing the inside of the heating chamber. 4. The cooker according to claim 1, wherein the light emitting element lights up or blinks in association with progress of heating. 5. The cooker according to claim 1, wherein a plurality of light emitting units each having a light emitting element as a light source are provided. 6. A light emitting unit using a light emitting element as a light source,
The cooker according to claim 1 or 2, which is incorporated in a door that opens and closes the heating chamber.