JPS6033427A - Inside illuminating device for electronic oven - Google Patents

Abstract

PURPOSE:To permit to illuminate simply and obtain sterilizing effect by a method wherein a fluorescent substance is coated on one part of a non-electrode low pressure mercury lamp, made of a material such as silica glass or the like which permeates ultraviolet, and the substance is emitted by magnetron. CONSTITUTION:The non-electrode low pressure mercury lamp 10 is made by a silica glass bulb 11, permeating serilizing rays, and one part thereof is coated by the fluorescent substance 12 while illuminating light is emitted from the surface coated with the fluorescent substance 12 and the sterilizing rays are projected from the surface without coating. The illuminating light illuminates a food under cooking and the sterilizing rays project the upper and side surfaces of the inside 8 of the oven. The fluorescent substance 12 is coated on the parts of the silica glass bulb 11 of the non-electrode low pressure mercury lamp 10 annularly and discontinuously and, whereby, the inside of the range may be illuminated uniformly.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides a lighting device for the interior of a microwave oven, which uses an electrodeless 2' low-pressure mercury lamp for illuminating the interior of the microwave oven. It is related to.

Conventional Structure and Problems Conventionally, a light bulb or an electric low-pressure mercury lamp has been used for lighting inside a microwave oven. FIG. 1 shows a circuit block diagram of an embodiment in which the inside of a microwave oven is illuminated by a light bulb. This lighting device has power supply 1 and switch 5.
A series circuit of a high-voltage transformer 4 and a magnetron 2 is connected through the circuit, and a general light bulb 3 is connected in parallel to this series circuit. When the switch 5 is turned on, a power supply voltage is applied to the magnetron 2 through the high voltage transformer 4, the microwave 6 is generated from the magnetron 2, and the microwave oven enters the cooking state. At the same time, the interior lighting bulb 3 is turned on, and the food being heated is illuminated. FIG. 2 is a circuit block diagram of an embodiment in which an electrodeless low-pressure mercury lamp 5 is used in place of the above-mentioned light bulb 3 for interior lighting. In the case of this device, when a power supply voltage is applied to the magnetron 2, the electrodeless low-pressure mercury lamp 7, which is not connected to the power supply, is turned on by receiving the microwave 6 generated from the magnetron 2, and the above-mentioned light bulb 3 is used. Produces the same lighting effect as the original.

In this way, the light bulb 3 or the electrodeless low-pressure mercury lamp 7 has been used to make it easier to see the cooking status of the microwave oven, but in the case of the former, the disadvantage is that it requires wiring to connect the bulb 3 to the source. There is.

However, in the latter case, there is a huge advantage that no wiring for lighting is required.

Purpose of the Invention The present invention uses an electrodeless low-pressure mercury lamp for lighting the inside of a microwave oven, and lights it up by the generation of microwaves from a magnetron inside the microwave oven, thereby simplifying the lighting inside the microwave oven. The purpose is to make it easier to use and to have a bactericidal effect.

Structure of the Invention The present invention involves coating a part of the inner wall of an electrodeless low-pressure mercury lamp using a material that transmits ultraviolet rays, such as quartz glass pulp, with a phosphor, and installing this electrodeless low-pressure mercury lamp inside a microwave oven. This is a microwave oven interior lighting device that uses a magnetron to emit light.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 3 and 4, mounting fittings 9a and 9b are provided in the microwave oven interior 8, and an electrodeless low-pressure mercury lamp 10 is attached to these fittings sa and 9b. The electrodeless low-pressure mercury lamp 10 is made by coating a part of the inner wall of a quartz glass pulp 11 with a phosphor 12. When the power is turned on, microwaves 14 are emitted from the magnetron 13, thereby lighting the electrodeless low-pressure mercury lamp 10. At this time,
The electrodeless low-pressure mercury lamp 1o is made of quartz glass pulp 11 that transmits germicidal radiation, and a part of it is coated with a phosphor 12, and illumination light is emitted from the surface coated with the phosphor 12. The germicidal radiation is irradiated from the uncoated surface, each illumination light illuminates the food being cooked, and the germicidal radiation illuminates the top and side surfaces of the chamber interior 8. At this time, the area where the phosphor 12 is applied to the quartz glass pulp 11 of the electrodeless low-pressure mercury lamp 5 is as shown in FIGS. 5a and 5b. By applying it discontinuously, the inside of the refrigerator can be illuminated uniformly. In addition, by applying the phosphor 12 only near the center of the pulp, as shown in FIGS. 6a and 6b, only the food being cooked is illuminated, and all areas that are not coated are irradiated with germicidal rays. It is also possible to increase the bactericidal effect even further.

Effects of the Invention As described above, according to the present invention, the food being cooked is illuminated, making it easier to see, and the sterilizing radiation can be irradiated to the upper part of the refrigerator, which is difficult to reach the microwaves. It has a sterilizing effect as well as illumination, and still has the advantage of eliminating the need for lighting wiring and lighting power.

[Brief explanation of the drawing]

1 and 2 are block diagrams of a conventional microwave oven interior lighting device, respectively. FIG. 3 is a front view showing the principle of a microwave oven interior lighting device according to an embodiment of the present invention. Figure 4 is the same side view, Figure 5a. FIGS. 6a and 6b are a front view and a side view, respectively, of an electrodeless low-pressure mercury lamp that can be used in the same device. 8...Inside microwave oven, 1o...Electrodeless low pressure mercury lamp, 12...Fluorescent material, 13...
...Magnetron 0 Name of agent Patent attorney Toshio Nakao and 1 other person 1st
Figure JP-A-Sho GO-33427 (3) Figure 3 Figure 4 Figure 6 (a) (1) No. 22 Life-1, 710

Claims (3)

[Claims] (1) Electrodeless low-pressure mercury lamp using a material that transmits ultraviolet rays, such as quartz glass pulp. A part of the interior wall of the chamber is coated with phosphor, and this electrodeless low-pressure mercury lamp is installed inside the microwave oven. A microwave oven interior lighting system that uses a magnetron to emit light. (2) The microwave oven interior illumination device according to claim 1, wherein the portion of the electrodeless low-pressure mercury lamp that is not coated with a phosphor is mounted upward in the microwave oven. (3) A microwave oven interior lighting device according to claim 1, in which a phosphor is applied discontinuously in a ring shape to the inner wall of an electrodeless low-pressure mercury lamp to make the illuminance distribution on the irradiated surface uniform. .