CN101303138A - High-frequency electromagnetic wave cooker with steam generating function - Google Patents

Abstract

The present invention aims to provide a high-frequency electromagnetic wave cooker with steam generating function, which is expected to improve heating efficiency and shorten cooking time, which includes: a door for opening/closing the outlet of the object to be heated on the heating chamber; A steam generating device (41) that generates steam by heating an evaporating dish with a water storage groove on the inner bottom surface of the heating chamber opposite to the machine door; generates high-frequency electromagnetic waves supplied to the heating chamber and a rotating antenna (32, 33) for radiating high-frequency electromagnetic waves from the magnetron into the heating chamber. High-frequency electromagnetic wave reflection components (34a, 34b) are also provided on the side close to the machine door in the installation space of the rotating antenna. In this way, part of the high-frequency electromagnetic waves emitted from the rotating antenna to the side of the machine door will be reflected by the high-frequency electromagnetic wave reflector to the inside of the heating chamber, and the high-frequency electromagnetic waves emitted to the side of the machine door will be reduced, which can easily eliminate the occurrence of red spots. Danger.

Description

High-frequency electromagnetic wave cooker with steam generating function

technical field

The invention relates to a high-frequency electromagnetic wave cooker with steam generating function.

Background technique

Fig. 8 shows a conventional high-frequency electromagnetic wave cooker with a steam generating function. This high-frequency electromagnetic wave cooker heats the heated object by supplying at least one of high-frequency electromagnetic waves and steam to the heating chamber 100 where the heated object is placed, including: high-frequency electromagnetic wave radiation that generates high-frequency electromagnetic waves Device 102 (with magnetron 103 in it); Be located in heating chamber 101, be used to produce the steam generator 104 of steam; Be located at the upper heater 105 of the top of heating chamber 101; The air in heating chamber 101 is stirred a circulation fan 106 for circulating it; and a convection heater 107 for heating the circulating air in the heating chamber 101 . The magnetron 103 is provided, for example, in a space below the heating chamber 101, and a rotating antenna 108 as radio wave radiating means is provided at a position for receiving microwaves emitted from the magnetron 103. In this way, when microwaves from the magnetron 103 are emitted to the rotating antenna 108, high-frequency electromagnetic waves can be emitted into the heating chamber 101. In addition, at the position of the middle height of the heating chamber 101, there is a bracket 109 which can be freely disassembled. The bracket 109 plays the role of a partition and divides the heating chamber 101 into upper and lower parts (for an example, see Japanese Patent Publication Bulletin 2006-66137).

However, in the existing high-frequency electromagnetic wave cooker with steam generating function described in the above-mentioned references, since the steam generating device 104 is arranged on the inner side of the heating chamber 101, the position of the rotating antenna 108 is biased toward The front half side of the heating chamber, that is, the side close to the outlet for the object to be heated that is opened and closed by the door. As a result, under the action of high-frequency electromagnetic waves emitted from the rotating antenna, red spots tend to be easily formed on the inner surface of the door near the side where the object to be heated is taken out. Especially in the case where the rotating antenna 108 has a highly directional portion of radio waves and can be locally heated, when the highly directional portion points toward the door side, red dots are likely to be generated.

Contents of the invention

The present invention aims to solve the problems existing in the existing problems, and provides a high-frequency electromagnetic wave cooker with steam generating function that can reduce the red spots generated on one side of the machine door and is safe to use.

The high-frequency electromagnetic cooker with steam generating function of the present invention comprises: a heating chamber for loading objects to be heated; a machine door for opening/closing the outlet of the object to be heated on the heating chamber; a steam generating device supplying steam; a magnetron generating high-frequency electromagnetic waves supplied into the heating chamber; and a rotating antenna radiating the high-frequency electromagnetic waves from the magnetron into the heating chamber. The evaporating dish in the steam generating device is arranged on the inner bottom surface of the heating chamber on the opposite side to the machine door, the rotating antenna is arranged on the front side of the evaporating dish, and on the The side of the rotating antenna close to the door is provided with a high-frequency electromagnetic wave reflecting part.

With such a structure, part of the high-frequency electromagnetic waves emitted from the rotating antenna to the door side will be reflected to the inside of the heating chamber by the high-frequency electromagnetic wave reflector, and the high-frequency electromagnetic waves emitted to the door side will be reduced and easily eliminated. Risk of red dots.

The technical effects produced by the present invention are as follows. After adopting the present invention, even if the rotating antenna is arranged on the side close to the door because a steam generating device is provided on the inner side of the heating chamber on the opposite side to the door in the heating chamber, red dots appear on the inside of the door. It is easy to avoid, so that a safe high-frequency electromagnetic wave cooker with steam generating function can be provided.

The high-frequency electromagnetic wave cooker with steam generating function of the first aspect of the present invention includes: a heating chamber for loading objects to be heated; a door for opening/closing the outlet of the object to be heated on the heating chamber; a steam generator for supplying steam in the heating chamber; a magnetron for generating high-frequency electromagnetic waves supplied to the heating chamber; and a rotating antenna for radiating the high-frequency electromagnetic waves from the magnetron into the heating chamber. The evaporating dish in the steam generating device is arranged on the inner bottom surface of the heating chamber on the opposite side to the machine door, the rotating antenna is arranged on the front side of the evaporating dish, and on the The side of the rotating antenna close to the door is provided with a high-frequency electromagnetic wave reflecting part. In this way, part of the high-frequency electromagnetic waves emitted from the rotating antenna to the side of the machine door will be reflected by the high-frequency electromagnetic wave reflecting part to the inside of the heating chamber, and the high-frequency electromagnetic waves emitted to the side of the machine door will be reduced, which can easily eliminate the occurrence of red spots. Danger.

In a second aspect, the rotating antenna described in the first aspect is provided with a portion with strong directivity of radio waves, and the portion with strong directivity of radio waves can be locally heated toward a predetermined portion. In this way, the object to be heated in the heating chamber can be heated uniformly or locally.

In a third aspect, the heating chamber described in the first or second aspect has a horizontally long shape, and two rotating antennas are provided along the horizontally long direction. In this way, even if the heating chamber has a laterally long shape, the object to be heated can be uniformly heated.

Description of drawings

FIG. 1 is a perspective view of a high-frequency electromagnetic cooker with a steam generating function in Embodiment 1 of the present invention.

Fig. 2 is a perspective view showing the internal structure of the cooking appliance.

Fig. 3 is a sectional view showing the internal structure of the cooking appliance.

Fig. 4 is a sectional view of an infrared sensor mounting portion.

Fig. 5 is a front view of the infrared sensor seen from the V direction in Fig. 4 .

Fig. 6 is a perspective view showing one form of a high-frequency electromagnetic wave emitting member.

Fig. 7 is an exploded perspective view of the machine door seen from the rear.

Fig. 8 is a perspective view of a conventional high-frequency electromagnetic wave cooker with a steam generating function.

Among the above-mentioned drawings, 10 is a high-frequency electromagnetic wave cooker with steam generating function, 11 is a heating chamber, 11a is a base plate (bottom surface), 31 is a magnetron, 32 is a first rotating antenna, and 33 is a second rotating antenna. 32b and 33b are parts with strong directivity of radio waves, 34a and 34b are high-frequency electromagnetic wave reflecting parts (reflector plates), 40 is a steam generating device, 41 is an evaporating dish, and M is a heated object.

Detailed ways

An embodiment of the heating cooker of the present invention will be described in detail below with reference to the accompanying drawings.

(implementation mode)

The heating cooker in this embodiment is shown in Figures 1 to 3. This high-frequency electromagnetic wave cooker 10 with steam generation function is provided with: a rectangular box-shaped body 12 with an open front surface, and a body for opening/closing. The door 20 of the opening portion on the body 12 is closed. The machine body 12 is provided with a horizontally long heating chamber 11 into which the object to be heated M is installed. As shown in Figure 2 and 3, be provided with in the heating chamber 11: Stir the air in the heating chamber 11 and make it circulate fan 13; The convection heater 14 that the circulating air in the heating chamber 11 is heated; An infrared sensor 15 for detecting the temperature in the heating chamber 11 is provided on the side wall 11c of the heating chamber 11 . The bottom plate 11a of the heating chamber 11 is provided with a concave portion 11b, and a high-frequency electromagnetic wave emitting member 30 for generating high-frequency electromagnetic waves (microwaves) is provided in the concave portion 11b. Since the upper part of the recess 11b is usually covered with a plate, the high-frequency electromagnetic wave emitting part 30 is hidden. In addition, a steam generating member 40 is provided on the back side of the concave portion 11b on the bottom plate 11a.

The heating chamber 11 is separated by a partition board 16 arranged inside the heating chamber 11 , and a space 17 is formed between the partition board 16 and the rear wall 12 a of the machine body 12 . As shown in FIG. 3 , a circulation fan 13 and a convection heater 14 are provided in the space 17 . A plurality of suction holes 16a are arranged in the center of the isolation plate 16, and a plurality of exhaust holes 16b are arranged in the periphery. Therefore, the air in the heating chamber 11 is first sucked in by the circulating fan 13 from the suction hole 16a, heated by the convection heater 14, and then sent into the heating chamber 11 through the exhaust hole 16b, thereby heating the heating chamber 11.

As shown in FIGS. 2 and 4 , a triangular prism-shaped protrusion 11 d protrudes toward the heating chamber 11 on the upper portion of the right side wall 11 c of the heating chamber 11 , and an infrared sensor 15 is disposed inside the protrusion 11 d. A window 11e is cut out on the lower surface of the protrusion 11d so that the test light emitted by the infrared sensor 15 can shine into the heating chamber 11 . The infrared sensor 15 can swing the head by means of the swing mechanism part 15a. As shown in Figure 5, the infrared sensor 15 faces the inside of the heating chamber through the window 11e (as shown by the solid line in Figure 5) during the cooking process, but after the cooking is finished, the infrared sensor 15 just shakes the head so that its lens deviates from the window 11e (as shown by the dotted line in Figure 5). In addition, as shown in Figure 2, the left and right side walls 11c and 11d of the heating chamber 11 are respectively provided with a plurality of sections (3 sections in Figure 2) of support protrusions 11f that are horizontal in the front and rear directions of the body, and the upper surfaces of these support protrusions 11f are in the shape of Horizontally, it is used to support the tray 50 with grills used in high-frequency electromagnetic wave cooking.

In addition, as shown in FIG. 5, the infrared sensor 15 is arranged at a position deviated from the center of the window 11e, and by moving the infrared sensor 15, the lens can be completely moved out of the window 11e. Like this, can be in the position that moves out of window 11e when measuring the temperature, thereby when using steam S to cook, can prevent the steam S in the heating chamber 11 from condensing on the lens surface of the infrared sensor 15, causing subsequent Temperature detection during cooking operation is abnormal.

As shown in Fig. 2, Fig. 3 and Fig. 6, the high-frequency electromagnetic wave emitting part 30 includes: a magnetron 31 for generating high-frequency electromagnetic waves in the machine room below the bottom plate 11a of the heating chamber 11; High-frequency electromagnetic waves generated by the tube 31 are guided to the waveguides 31 a on the first rotating antenna 32 and the second rotating antenna 33 . In addition, a first rotating antenna 32 and a second rotating antenna 33 for reflecting high-frequency electromagnetic waves from the magnetron 31 are provided in the concave portion 11b on the bottom plate 11a. The first rotatable antenna 32 and the second rotatable antenna 33 are respectively provided with highly directional parts 32b and 33b for radiating high-frequency electromagnetic waves from the magnetron 31 toward specific parts. The part faces a specific direction, which can realize localized concentrated heating. In addition, an evaporating dish 41 of the steam generating device 40 is provided on the inner side of the recess 11b on the bottom plate 11a, and an evaporating dish heater 42 is provided below the evaporating dish 41 (see FIG. 3 ). As shown in FIG. 6, the rotating antennas 32 and 33 are arranged to be arranged left and right on a side close to the door 20 from the center of the heating chamber.

In addition, reflectors 34a and 34b made of high-frequency electromagnetic wave reflectors are respectively provided near the front (downward as shown in FIG. 6 ) of the first rotatable antenna 32 and the second rotatable antenna 33 in the recess 11b. These reflection plates 34a and 34b can be fixed by, for example, screws or the like. After such reflectors 34a and 34b are arranged in front of the rotating antennas 32 and 33, the high-frequency electromagnetic waves emitted toward the front of the heating chamber 11 after hitting the rotating antennas 32 and 33 will be reflected by the reflectors 34a and 34b to become Emitted to the inside of the heating chamber 11.

The configuration of the inside of the door 20 is shown in FIG. 7 . As shown in FIG. 7, the rear side (the right side in FIG. 7) of the operating part 22b at the lower part of the door frame 22 is provided in sequence: an operating circuit board 27a, a circuit board cover 27b made of resin, and a heat dissipation plate made of aluminum. 27c. In addition, an electromagnetic wave sealing plate 28 and an inner decorative cover 29 for decorating the rear surface of the door 20 are provided on the entire rear side of the door frame 22 . In the electromagnetic wave sealing plate 28, a heat-resistant glass 28b is fitted in an opening portion of a rectangular metal frame 28a, and is fixed to the back of the door frame 22 with screws. Furthermore, a space for cooling is formed between the radiator plate 27c and the inner decorative cover 29, and air is supplied along the width direction of the door 20 for cooling.

In the high-frequency electromagnetic wave heating cooker having the above-mentioned structure, since the two rotating antennas of the first rotating antenna 32 and the second rotating antenna 33 are arranged in the left-right direction of the heating chamber 11, and the rotating antennas 32 and 33 can rotate, therefore Even if the heating chamber is in the shape of a cuboid, electromagnetic waves can be evenly radiated into the heating chamber to improve heating efficiency. In addition, since the rotating antennas 32, 33 are provided with parts 32b, 33b with strong directivity of radio waves, by making these parts 32b, 33b with strong directivity face the part that needs to be heated according to the cooking requirements, or face the part heated by the infrared sensor 15 areas with lower temperature detected, local/concentrated heating can be performed on these areas, and high-efficiency heating can be achieved for fast food lunch boxes and other foods. In addition, since the evaporating dish 41 is also provided, steam can be supplied from the evaporating dish 41 into the heating chamber 11, so that steam heating and cooking can be performed alone or combined with high-frequency electromagnetic waves for simultaneous heating.

In addition, in the above-mentioned high-frequency electromagnetic wave cooker, since the reflectors 34a, 34b that play the role of high-frequency electromagnetic wave reflectors are also provided on the side close to the door 20 from the rotating antennas 32, 33, the rotating antennas 32 and 33 part of the high-frequency electromagnetic wave that shoots to one side of the machine door is reflected to the inside of the heating chamber. In this way, even if the rotating antennas 32, 33 are disposed toward the door side because the evaporating dish is provided on the inner side of the heating chamber 11, red spots can be prevented from being generated on the inner surface portion of the door. In particular, since the rotating antennas 32, 33 with the positions 32a and 33a with strong directivity of radio waves are adopted, even when the positions 32a and 33a with strong directivity of radio waves face the direction of the door, the red dot can be prevented reliably. It can provide a cooking utensil with uniform heating, localized centralized heating, and good safety performance.

In addition, the heating cooker of the present invention is not limited to the above-mentioned respective forms, and appropriate deformation and improvement are possible.

To sum up, in the high-frequency electromagnetic wave cooker with steam generating function of the present invention, part of the high-frequency electromagnetic waves emitted from the rotating antenna to the side of the door can be reflected to the inside of the heating chamber by the high-frequency electromagnetic wave reflecting member, thereby enabling The high-frequency electromagnetic wave directed to the machine door is reduced to avoid the danger of red spots, so a high-frequency electromagnetic wave cooker with a steam generating function that can perform steam cooking and heating and can be operated safely can be provided.

Claims (3)

1. A high-frequency electromagnetic cooker with steam generating function, characterized in that it comprises: A heating chamber for loading objects to be heated; A door for opening/closing the heated object taking-out port on the heating chamber; a steam generating device for supplying steam into the heating chamber; a magnetron generating high-frequency electromagnetic waves supplied to the heating chamber; and radiating the high-frequency electromagnetic waves from the magnetron to a rotating antenna inside the heating chamber, The evaporating dish in the steam generating device is arranged on the inner bottom surface of the heating chamber on the opposite side to the machine door, the rotating antenna is arranged on the front side of the evaporating dish, and on the The side of the rotating antenna close to the door is provided with a high-frequency electromagnetic wave reflecting part. 2. The high-frequency electromagnetic wave cooker as claimed in claim 1, characterized in that: said rotating antenna is provided with a part with strong directivity of radio waves, and said part with strong directivity of radio waves can be locally heated toward a predetermined part. 3. The high-frequency electromagnetic cooker according to claim 1 or 2, characterized in that: the heating chamber has a long horizontal shape, and two rotating antennas are arranged along the long horizontal direction.

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