JPH11241826A - High frequency heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the shortening due to shock of life of rod type halogen lamp, arranged on the ceiling surface of a heating chamber. SOLUTION: A high frequency heater is provided with a high frequency wave generating device 2, generating high frequency wave, a heating chamber, heating a matter to be cooked by the high frequency wave, a door, arranged at the opening 17 of the heating chamber to intercept the high frequency wave, a door glass, provided on the door to transmit light into the cooking chamber, and a fan 1 for cooling the high frequency wave generating device 2. Further, the high frequency heater is provided with an air guide 11, guiding air ventilated by a fan 1 from the ceiling unit 3 of the heating chamber into the cooking chamber, a halogen lamp, arranged in the air guide 11, light transmitting punching holes, formed on the ceiling surface 3 of the heating chamber to guide the light of the halogen lamp into the heating chamber to illuminate the same, a light transmitting plate, arranged between the halogen lamp and the light transmitting punching holes, a reflecting plate, covering the circumference of the halogen lamp to reflect the light the cooking chamber, and punching holes 12 for the suction air of the heating chamber. which are formed on the door side of ceiling surface 3 of the heating chamber to ventilate air, guided by the air guide 11, toward the door glass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating apparatus provided with a halogen lamp for illuminating an object to be cooked.

[0002]

2. Description of the Related Art In order to check the finish of an object to be cooked in a heating chamber, the heating chamber is usually illuminated by using an incandescent lamp disposed on a side wall of the heating chamber.

[0003] As Conventional Example 1, Japanese Utility Model Application Laid-Open No. 58-85108
In this publication, an air guide 103 is attached to a blower 102 inside a main body 101 shown in FIG. 3 to cool a high-frequency generator 104, and the cooled air is further provided with an illuminating lamp 105 inside the air guide to cool the side wall of the open main body. A punching hole 106 is provided in the heating chamber 107 to guide air.

[0004] The reason why air is introduced into the heating chamber 107 is to prevent fogging of the glass portion and the like disposed on the inner surface of the door due to the generation of steam from the object to be cooked by heating.

A second conventional example is disclosed in Japanese Patent Laid-Open No. 63-189.
In Japanese Patent Publication No. 714, a halogen lamp 206 is provided and used as an illuminating lamp on the side wall of the heating chamber shown in FIG. The air cooled by the high-frequency heating device 203 is guided by an air guide 205 to a punching hole 207 formed in the side wall of the open main body, and the air is guided from the punching hole 207 to the heating chamber 201. In addition, a shield plate 204 is provided in the air guide 205 so that wind does not directly hit the halogen lamp 206 to maintain the lamp life.

Further, as a third conventional example, Japanese Patent Laid-Open No.
No. 454, the heating chamber top surface 301 shown in FIG.
In the front-back direction, a bar-shaped halogen lamp 302 is provided near the center in the front direction, a lamp reflector is provided, a light-transmitting plate such as glass is provided on the cooking chamber side, and light from the bar-shaped halogen lamp 302 is emitted from a punching hole 303. By doing so, even when the cooking shelf is moved up and down, the illumination is always illuminated from above the object to be cooked, so that it is easier to see than the heating chamber side wall attachment.

[0007] The rod-shaped halogen lamp 303 is arranged parallel to the left and right direction of the heating chamber (when viewed from the door side). In this case, the method of taking in air into the heating chamber is performed by providing a punching hole 304 from the side wall as in the related art.

[0008]

However, as described above, the purpose of arranging the halogen lamp on the top surface in the conventional example 3 is only to uniformly illuminate the object to be cooked by changing the height of the shelf in the heating chamber. When such a halogen lamp is arranged, the top surface of the cabinet becomes hot due to the heat generated from the halogen lamp, and the fogging due to the water vapor of the door glass is sucked in from the side wall as in the past, so that the object to be cooked is placed on the inner surface of the door glass. Water vapor generated by the heating adhered to the door glass, and the inside of the cooking chamber remained unsightly.

Further, the rod-shaped halogen lamp is arranged in parallel to the left and right direction of the heating chamber so that the impact force of the door is hardly transmitted to the filament in the halogen lamp, but it is not possible to sufficiently absorb the impact by itself. However, there is a problem that the life of the halogen lamp is shortened.

Further, when the halogen lamp is disposed on the top of the heating chamber, there is a problem that the temperature of the top of the cabinet abnormally rises due to the exhaust heat and the temperature of the cooking chamber.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The temperature of the top surface of the cabinet is reduced, and the temperature of the intake air is increased by using the exhaust heat of a halogen lamp as a measure against fogging of the door glass. This is a high-frequency heating device that can be sent to the inner surface and hardly receive an impact force caused by opening and closing the door of the halogen lamp terminal.

According to a first aspect of the present invention, there is provided a high-frequency generator for generating a high frequency, a heating chamber for heating an object to be cooked by the high frequency, a door disposed at an opening of the heating chamber for shutting off the high frequency, In a high-frequency heating device provided with a door and provided with a door glass for transmitting light into the cooking chamber and a blower for cooling the high-frequency generator, air blown by the blower is blown from the top of the heating chamber to the cooking chamber. An air guide leading to the air guide, a halogen lamp provided in the air guide, a light-transmitting punching hole formed on the top surface of the heating chamber and guiding the light of the halogen lamp into the heating chamber, and illuminating the halogen lamp. A light transmitting plate disposed between the light transmitting punching holes,
A reflecting plate that covers the periphery of the halogen lamp and reflects light to the cooking chamber; and a heating chamber intake formed on the door side of the top of the heating chamber to send air guided by the air guide to the door glass. And a punching hole.

According to a second aspect of the present invention, in addition to the first aspect, the door is a side-opening type, and the top of the heating chamber is parallel to the lateral direction of the door and holds the door. The halogen lamp is provided on the door hinge side. According to claim 2,
When the door is side-opening, the impact force when opening and closing the door in the left and right direction is smaller on the door hinge side and stronger on the door latch side. By arranging the halogen lamp on the door hinge side from the center of the surface, the impact force on the halogen lamp is reduced.

According to a third aspect of the present invention, in addition to the first aspect, there is provided an angle having a light-transmitting plate retainer for fixing the light-transmitting plate, and a terminal supporting portion for supporting a terminal of the halogen lamp. The end face of the reflection plate and the end face of the terminal support portion are disposed so as to overlap with each other. According to the third aspect, the ingress of steam from the inside of the main body is prevented by a transparent plate such as glass on the inside of the cooking chamber of the halogen lamp, and a punching hole is provided in the ceiling of the cooking chamber to illuminate the cooking object. In addition, a reflector is provided around the halogen lamp to improve lighting efficiency, and the end surface of the lamp overlaps with the halogen lamp terminal support to maintain the lamp surface at a high temperature to prevent blackening of the lamp surface. Prevents filament consumption.

According to a fourth aspect of the present invention, in addition to the first aspect, a heat dissipation gap formed between the reflector and the air guide is provided for heat dissipation from the reflector. According to the fourth aspect, a gap is provided between the top surface of the reflector, which maintains the halogen lamp at a high temperature, and the inner wall of the duct, and the air fed into the air guide is efficiently cooled to the high-temperature reflector, and the temperature of the reflector is reduced to the high temperature. The resulting air is blown out from the heating chamber intake punching hole, thereby preventing water vapor adhering to the inner surface of the door glass. In addition, it is possible to prevent a rise in the outer temperature due to the arrangement of the halogen lamp on the top surface, and to lower the temperature of the air guide.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the high-frequency heating apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a state in which an air guide (11) is attached. A blower (1) is provided for cooling the cooking chamber, and a high-frequency generator (2) and a control unit provided on the back of the panel operation unit are also cooled through a punching hole (15) for introducing outside air to a rear plate (14). Cooling the inside of the body.

When viewed from the heating chamber opening (17) side, a reflection plate (16) for covering a pipe heater as an upper heater is disposed on the back side of the heating chamber top surface (3), and an air guide (11) is provided. It is arranged on the top surface of the heating chamber on the heating chamber opening (17) side with respect to the reflection plate (16). In addition, the air intake (12) into the air guide (11) is taken from an air intake (11a) formed on the right side of the top surface of the air guide (11), and through the air chamber (11) through a heating chamber intake punching hole. The air is exhausted (13) to hit the inner surface of the door glass. The air guide (1
In 1), a rectifying plate (11b) is formed to regulate the flow of air to the intake port (11a).

Next, an exploded view of FIG. 2 shows a configuration of parts inside the air guide. A rod-shaped halogen lamp (4) for cooking room illumination is positioned parallel to the left and right direction of the top surface of the heating room (3), and a glass plate (5), which is a light-transmitting plate, is provided inside the cooking room. A punching hole (6) for illumination is provided on the surface (3). A reflector (7) is provided around the halogen lamp (4) to reflect the light of the halogen lamp (4) and guide the light into the cooking chamber.

The angle (8) has a structure in which the end face (8a) of the lamp terminal indicating portion and the end face (8a) of the reflection plate are overlapped with the angle (8) in which the transmission plate holder and the lamp terminal support are formed. By suppressing heat conduction from the halogen lamp (4) via the angle (8), the halogen lamp (4) can be maintained at a high temperature. By providing the glass plate (5) on the light-transmitting punching hole (6), it is possible to protect the quartz tube of the halogen lamp from devitrification due to water vapor generated from the cooking object in the heating chamber (9). ing.

In order to improve the lighting efficiency in the cooking chamber, a reflecting plate (7) is provided, and a glass plate holder of a light transmitting plate and an angle (8) for holding a halogen lamp terminal are attached to the halogen lamp (4). Maintain high temperature to maintain filament life and reflector (7) in air guide (11)
The temperature is high to prevent fogging of the door glass by using the exhaust heat.

Here, a comparative experiment of halogen lamp illumination is performed to confirm the effect of the present embodiment. As shown in Table 1 below, the conditions of the embodiment are more suitable for the bottom of the cooking chamber than the incandescent lamps installed on the top. The illumination level of the food on the placed tray is high. In Table 1, the right, left, back, etc. of the tray are the states viewed from the heating chamber opening (17) side.

[0023]

[Table 1]

Further, in order to protect the rod-shaped halogen lamp (4) from the impact force when opening and closing the heating chamber door, the mounting is made perpendicular to the horizontal direction of the top of the heating chamber as shown in FIG. The door opening / closing test was performed as shown in Table 2 below for the impact force, and a comparison was made. It can be seen that the life can be considerably improved by simply changing the mounting direction of the halogen lamp (4). Furthermore, in the present embodiment, the halogen lamp (4) is arranged on the hinge (10) side from the center of the top surface of the heating chamber, thereby further reducing the impact force when the door is opened and closed on the halogen lamp (4).

[0025]

[Table 2]

Next, as shown in FIG. 2, a punching hole (12) is provided in the front left and right direction of the heating chamber top surface (3).
The inclined surface (1) of the air guide (11) is placed on the top surface (3) of the heating chamber.
By positioning 1c), the air flow (12) has directionality, air is taken in from the blower side at the back right of the top of the heating chamber, and the hot air that has cooled the halogen-lane reflector is sent to the door. As shown in FIG. 1, the direction of the wind blown to the inner surface of the door is imparted from the punching hole (12) formed obliquely upward, so that the steam generated by heating the object to be cooked makes the door glass. The cloudiness disappears and the inside of the cooking chamber becomes very easy to see.

For example, an incandescent lamp is attached to the right side of the top of the heating chamber (3) [the high-frequency generator (2) side] to determine how the door glass becomes fogged with the air guide and the configuration of the present embodiment. Table 3 shows the results of the comparative experiment. The effect was so great that almost no problem was seen in the cooking room.

[0028]

[Table 3]

Next, when the reflecting plate (7) and the halogen lamp (4) are positioned on the top surface of the heating chamber (3), the air guide is applied to the top surface of the reflecting plate by the air guide as in the present embodiment. By providing a gap and returning the exhaust heat to the door of the heating chamber, the temperature of the cooking chamber top surface was greatly reduced as shown in Table 4.

[0030]

[Table 4]

[0031]

According to the high frequency heating apparatus of the present invention, the following effects can be obtained by the above configuration. According to the first aspect, the illumination of the cooking chamber from the top of the heating room is improved, and the exhaust heat of the halogen lamp is heated to the inner surface of the door glass by the exhaust heat of the halogen lamp from the top of the heating chamber by using an air guide. By blowing the heated hot air, the fogging of the door glass is prevented by steam generated from the object to be cooked, thereby making it difficult to see inside the room to be cooked.

According to the second aspect, the conventional halogen lamp has a disadvantage that the illuminance is higher than the incandescent lamp but the impact resistance life is shorter, but the impact force at the time of opening and closing the door is maintained while maintaining a sufficient illuminance. Can be used, and the product life can be set without any trouble.

According to the third aspect, since heat conduction from the halogen lamp is suppressed, the halogen lamp can be maintained at a high temperature, the consumption of the filament of the halogen lamp can be delayed, and the life of the halogen lamp can be maintained long. .

According to the fourth aspect, the reflecting plate, which has been heated to a high temperature by the heat radiation of the halogen lamp, can be efficiently discharged by the gap between the reflecting plate and the air guide, and can be used to prevent fogging of the door glass. At the same time, the effect of lowering the temperature of the cooking room top surface can ease the installation conditions of the high-frequency heating device.

[Brief description of the drawings]

FIG. 1 is a completed perspective view of a high-frequency heating device according to the present invention.

FIG. 2 is an exploded view of a main part of the high-frequency heating device of FIG.

FIG. 3A is a cross-sectional view of the high-frequency heating device of Conventional Example 1, and FIG.

FIG. 4 is a cross-sectional view of a high-frequency heating device of Conventional Example 2.

FIG. 5 is a vertical cross-sectional view of a high-frequency heating device of Conventional Example 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blower 2 High frequency generator 3 Top surface of heating chamber 4 Halogen lamp 5 Translucent plate (glass plate) 11 Air guide 12 Intake direction of air guide 13 Exhaust direction from air guide 14 Rear plate 15 Punching hole for intake of outside air 16 Above Heater reflector

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H05B 6/64 H05B 6/64 B

Claims (4)

[Claims] 1. A high-frequency generator for generating a high-frequency wave, a heating chamber for heating an object to be cooked by the high-frequency wave, a door disposed at an opening of the heating chamber to shut off the high-frequency wave, and a cooking device provided on the door. A door glass that transmits light into the room, and a high-frequency heating device including a blower that cools the high-frequency generator, an air guide that guides air blown by the blower from the top of the heating room into the cooking chamber, A halogen lamp provided in the air guide; a light-transmitting punching hole formed on the top of the heating chamber for guiding light of the halogen lamp into the heating chamber for illumination; and a halogen lamp and the light-transmitting punching hole. A reflecting plate that covers the periphery of the halogen lamp and reflects light to the cooking chamber; and the heating chamber for blowing air guided by the air guide to the door glass. Top door High-frequency heating apparatus, comprising a punching hole heating chamber inlet to be formed. 2. The method according to claim 1, wherein the door is of a horizontal opening type, and the halogen lamp is arranged on a top surface of the heating chamber in a direction parallel to a lateral direction of the door and on a door hinge side for holding the door. The high-frequency heating device according to claim 1, wherein: 3. A translucent plate retainer for fixing the translucent plate,
2. The high-frequency heating apparatus according to claim 1, further comprising an angle having a terminal support portion for supporting a terminal of the halogen lamp, wherein the reflector end face and the terminal support end face are arranged to overlap. 4. The high-frequency heating apparatus according to claim 1, further comprising a heat-dissipating gap formed between the reflector and the air guide to dissipate heat from the reflector.