JP2010071503A - High-frequency heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-frequency heating device with a heater, mounting a lighting system with a small number of parts and in a simple structure, and reducing a temperature rise of an oven lamp. <P>SOLUTION: This high-frequency heating device includes: a heating chamber 20 storing a material 22 to be heated; a high-frequency heating means 18 for heating the material 22 to be heated stored in the heating chamber 20; a blower 17 for cooling the high frequency generating means 18; an air guide 10 for guiding the wind from the blower 17 to the interior of the heating chamber; a heater 27 for heating the heating chamber 20; and the lighting system 11 for illuminating the material 22 to be heated in the heating chamber. The lighting system 11 is disposed on the under surface 14 of the air guide, so that even when hot air from the heating chamber 20 reversely flows into the air guide 10 in the oven heating state, the under surface of the air guide 10 reaches a comparatively lower temperature because the hot air has a habit of going upward so as to restrain a temperature rise of the lighting system 11. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a mounting structure for a lighting device of a high-frequency heating device with a heater.

  Conventionally, as this type of high-frequency heating device, for the purpose of preventing condensation in the heating chamber and clouding of the inner surface of the door, a metal plate-like material or resin material is formed in a substantially U shape, and the wind is guided into the heating chamber. Some have an air guide for fixing the lighting device inside. 3 and 4 show the configuration of a conventional high-frequency heating device (see, for example, Patent Document 1).

  FIG. 3 shows a configuration of a conventional high-frequency heating device, and FIG. 4 shows a configuration of attaching a conventional lighting device to an air guide.

3 and 4, the object to be heated is stored in the heating chamber 1 provided with the door 2. The magnetron 3 supplies a high frequency to the heating chamber. The high voltage transformer 4 supplies a power supply voltage to the magnetron 3. The cooling fan 5 supplies cooling air to the electrical parts such as the magnetron 3 through the air guide 6. The waveguide 7 guides the high frequency generated by the magnetron 3 to the heating chamber 1. The lighting device 8 illuminates the object to be heated in the heating chamber 1.
JP 2003-151756 A

  In the conventional configuration, the cooling air is sent to the magnetron 3 during the high frequency heating operation, and the cooling air hits the lighting device 8 provided in the air guide 6 to suppress the temperature rise.

  However, since the magnetron 3 does not operate during cooking in the oven, there is no need for cooling. Conversely, if the cooling air is blown into the heating chamber 1, the temperature in the heating chamber 1 is prevented from rising. The cooling air was prevented from entering inside. However, there is also a problem that the hot air from the heating chamber 1 flows back to the air guide 6 and causes the temperature of the lighting device 8 to rise.

  For the above reason, in the high-frequency heating device with a heater, the lighting device 8 is not installed in the air guide 6, but the lighting device 8 is installed in another place by blocking hot air with glass or the like, and the number of parts increases. However, there is also a problem that the structure becomes complicated.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a high-frequency heating device in which a lighting device can be attached with a simple structure with a small number of parts.

  In order to solve the above-described conventional problems, a high-frequency heating device according to the present invention includes a heating chamber for storing an object to be heated, high-frequency heating means for heating the object to be heated stored in the heating chamber, and the high-frequency generation means. An air guide for guiding the air from the blower into a heating chamber, a heater for heating the heating chamber, and a lighting device for illuminating an object to be heated in the heating chamber, The socket part is arranged outside the lower surface of the air guide, and only the lamp part is held in the air guide.

According to the present invention, the lighting device can be attached to the air guide with a simple structure having a small number of parts in the high-frequency heating device with a heater.

  The first invention is a heating chamber for storing an object to be heated, high-frequency heating means for heating the object to be heated stored in the heating chamber, a blower for cooling the high-frequency generation means, and wind from the blower. An air guide led into the heating chamber, a heater for heating the heating chamber, and an illumination device for illuminating an object to be heated in the heating chamber are provided, and the illumination device is disposed on the lower surface of the air guide.

  As a result, even if hot air from the heating chamber flows back into the air guide during oven heating, the temperature of the lower surface of the air guide is relatively low because the hot air has a habit of going up, and the temperature rise of the lighting device is suppressed. Can do.

  Further, by fixing the lighting device in the air guide, it is not necessary to separately arrange the lighting device by blocking hot air with glass or the like, so that the number of parts can be reduced and the cost can be reduced.

  In a second aspect of the invention, in particular, in the first aspect of the invention, the lighting device for illuminating an object to be heated includes a lamp unit that generates light and a socket unit that holds the lamp unit, and the socket unit is the air unit. It is arranged outside the lower surface of the guide, and only the lamp part is held in the air guide.

  Thereby, the influence of the hot air from a heating chamber can be suppressed and the rise in temperature can be made low by arrange | positioning the socket part of the illuminating device which is often molded with resin outside the lower surface of the air guide.

  In a third aspect of the invention, in particular, in the first or second aspect of the invention, the air guide is formed in a substantially U shape, one end is in contact with a heating chamber side wall having a plurality of holes, and the lower surface of the air guide is the heating surface. It coincides with the lower end of the hole provided in the chamber side wall.

  Thereby, the lamp | ramp part which generate | occur | produces light is arrange | positioned at the same height as a heating chamber side wall, and can irradiate the to-be-heated material in a heating chamber effectively.

  In a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the lower surface of the air guide includes an inclined surface inclined downward from a surface on which the lighting device is disposed, and a plurality of the inclined surfaces are provided on the inclined surface. A hole is provided.

  Thereby, a part of the cooling air of the magnetron is blown from the hole provided in the inclined part to the socket part exposed to the outside of the air guide, and the temperature rise of the socket part can be prevented.

  In a fifth aspect of the present invention, in particular, in any one of the first to fourth aspects, the lighting device is fixed to the lower surface of the air guide by a substantially U-shaped mounting plate, and at least two of the side surfaces of the mounting plate are It has been released.

  As a result, even if hot air from the heating chamber flows back into the air guide during oven heating, and hot air leaks out from the periphery of the lamp part to the socket part, the hot air stays in the socket part because the side of the mounting plate is open. Therefore, the temperature rise of the socket part can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment)
FIG. 1 is a side view of the vicinity of an air guide of a high-frequency heating device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view from the front of the high-frequency heating device.

  In FIG. 1, the illuminating device 11 is comprised from the lamp | ramp part 11a which irradiates light, and the socket part 11b which hold | maintains the lamp | ramp part 11a. A mounting plate 13 is fixed to the lower surface 14 of the air guide 10 on the lower outer side, and a socket portion 11b is fixed to the mounting plate 13 with screws or the like.

  Since the side surface of the mounting plate 13 is open and the height is substantially the same as the socket portion 11b, the socket portion 11b is fixed in a state of being exposed to the outside of the air guide 10.

  The lower surface 14 of the air guide 10 has an inclined surface 15 inclined downward on the magnetron 18 side, and a plurality of holes 16 are provided. Of the cooling air 19 from the cooling fan 17, the air 19a that cools the socket portion 11b. Goes through.

  Wind is guided into the heating chamber 20 from the hole 12 provided in the side wall of the heating chamber, preventing condensation in the heating chamber 20 and clouding of the inner surface of the door, and irradiating the heating chamber 20 with light from the lighting device 11. Yes.

  In FIG. 2, a rotary mounting table 25 on which the object to be heated 22 is placed is provided on the bottom surface of the heating chamber 20 and is rotated by a motor 26, thereby preventing the concentration of heating by rotating the object to be heated. It is out.

  A convection heater 27 is fixed in the circulation fan case 21 on the upper surface of the heating chamber 20, and the circulation fan motor 29 is rotationally driven by a circulation fan motor 29 from an intake hole 23 provided on the upper surface of the heating chamber 20. The air is sucked in, heated by the convection heater 27, and then supplied from the exhaust hole 24 into the heating chamber 20.

  Since the intake hole 23 is disposed on the right side of the heating chamber 20 and the exhaust hole 24 is disposed on the left side, the hot air 30 ejected from the exhaust hole 24 passes above and below the heated object 22 and is sucked into the intake hole 23. An orderly circulation path is constructed.

  Since the hole 12 provided in the side wall of the heating chamber 20 is provided at a height substantially coincident with the lower surface of the air guide 10, even if the lighting device 11 is fixed to the lower surface 14 of the air guide, Since the irradiated light 31 also travels in the downward direction, it becomes possible to illuminate the object to be heated 22 as a whole, and the object to be heated 22 during cooking is easily visible.

  As described above, according to the present embodiment, the lighting device can be attached to the air guide with a simple structure with a small number of parts in the high-frequency heating device with a heater.

  In addition, since only the lamp part is held in the air guide, the socket part of the lighting device, which is often molded with resin, is arranged outside the lower surface of the air guide, suppressing the influence of hot air from the heating chamber, Since the temperature rise can be reduced, not only the cost can be reduced, but also the reliability of the parts can be improved.

  The present invention can be applied to a high-frequency heating device such as a microwave oven.

The side view of the air guide vicinity of the high frequency heating apparatus in embodiment of this invention Sectional drawing from the front of the high frequency heating device in an embodiment of the present invention External perspective view of a conventional high-frequency heating device External perspective view of air guide of conventional high-frequency heating device

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air guide 11 Illuminating device 11a Lamp part 11b Socket part 13 Mounting plate
14 Underside of air guide

Claims (5)

A heating chamber for storing an object to be heated, high-frequency heating means for heating the object to be heated stored in the heating chamber, a blower for cooling the high-frequency generation means, and an air guide for guiding the wind from the blower into the heating chamber And a heater for heating the heating chamber and a lighting device for illuminating an object to be heated in the heating chamber, and the lighting device is disposed on the lower surface of the air guide. An illumination device that illuminates an object to be heated in a heating chamber includes a lamp unit that generates light and a socket unit that holds the lamp unit. The socket unit is disposed outside the lower surface of the air guide, and only the lamp unit is an air guide. The high frequency heating device according to claim 1, which is held in the inside. The air guide is formed in a substantially U shape, one end is in contact with a heating chamber side wall having a plurality of holes, and the lower surface of the air guide coincides with a lower end of a hole provided in the heating chamber side wall. 2. The high frequency heating apparatus according to 2. The high-frequency heating device according to any one of claims 1 to 3, wherein a lower surface of the air guide includes an inclined surface inclined downward from a surface on which the lighting device is disposed, and a plurality of holes are provided in the inclined surface. . The high-frequency heating device according to any one of claims 1 to 4, wherein the lighting device is fixed to a lower surface of an air guide by a substantially U-shaped mounting plate, and at least two sides of the mounting plate are open. .

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