JPH11351581A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker in which it is prevented vapor to be exhausted from staying in a heating chamber and liquefied vapor from being deposited on an internal surface of a door of the heating chamber. SOLUTION: A heating cooker includes a heating chamber 1 in which an article to be heated is contained, a magnetron separated from the heating chamber 1 through a partition plate 2 for supplying microwaves into the heating chamber 1, a cooling fan 6 for cooling the magnetron by introducing fresh air A, and a heating chamber door for closing an opening of the heating chamber 1 freely to open and close. There is further disposed an air passage at a front position of a ceiling of the heating chamber 1 for dividing and introducing the fresh air A introduced by the cooling fan 6. There is moreover disposed an air intake port 23 in the air passage 22 for exhausting the introduced fresh air A as an air curtain extending along then internal surface of the heating chamber door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device,
In particular, it relates to a high-frequency heating cooker called a microwave oven.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7 showing a right-side cross-sectional configuration and FIG.
A magnetron 3 arranged on the side of the heating chamber 1 via the partition plate 2 and supplying microwaves into the heating chamber 1 to heat the object to be heated; and a cooker provided with these. A cooling fan 6 for introducing external air A from an air inlet 5 formed in the bottom surface of the main body 4 to cool the magnetron 3
And a heating chamber door 7 for opening and closing the opening of the heating chamber 1 through which an object to be heated enters and exits.
The external air A that has been cooled by the cooling fan 6 and has cooled the magnetron 3 is
Of the outside air A before cooling the magnetron 3, a part of the external air A passes through the air inlet 9 formed in the partition plate 2, while being discharged from the air outlet 8 formed on the back surface of the heating chamber 1. And contains steam generated from the heated object to be heated, and is then discharged to the outside through an air discharge port 10 formed on the back surface of the cooking device main body 4.

[0003] Furthermore, the cooking device at this time is shown in FIG.
And the energization of the magnetron 3, the cooling fan 6, the high-voltage condenser 11 and the like is started by the ON operation of the relay 13 provided in the control unit 12. Has become. Therefore, heating room 1
After the object to be heated is placed inside the heating chamber door 7 and the start key of the control panel 14 provided on the front surface of the cooking device main body 4 is pressed after closing the heating chamber door 7, the relay 13 is turned on and the high voltage condenser 11 is turned on. Is supplied, and the magnetron 3 oscillates to start heating and cooking the object to be heated. In addition,
In the figure, reference numeral 15 denotes a lamp as a lighting device for illuminating the inside of the heating chamber 1, and 16 denotes a temperature sensor.
When 6 detects an abnormal temperature in the heating chamber 1, the power supply to the magnetron 3 and the like is cut off. Reference numerals 17 to 19 in the figure denote interlock switches interlocked with the operation of the heating chamber door 7.
The safety function that does not start the heating cooking when the opening operation is performed is realized.

[0004]

However, the conventional cooking device has the following disadvantages. That is, in this heating cooker, only a part of the external air A introduced by the cooling fan 6 flows into the heating chamber 1 only through the air inlet 9 formed in the partition plate 2. In some cases, the amount of the external air A flowing through the inside of the heating chamber 1 is not sufficient.
Stagnation occurs, and even steam generated from the heated object stagnates and is difficult to discharge. Further, when a large amount of steam is generated from the object to be heated, the steam in contact with the inner surface of the glass window forming the heating chamber door 7 may be liquefied and adhered. As a result, it becomes difficult to visually observe the inside of the heating chamber 1 from outside as a result of the glass window being fogged.

[0005] The present invention has been made in view of these inconveniences, and stagnation of steam to be discharged occurs in a heating chamber, and liquefied steam adheres to the inner surface of a heating chamber door. It is an object of the present invention to provide a heating cooker having a configuration that does not cause any problem.

[0006]

According to a first aspect of the present invention, there is provided a heating cooker comprising: a heating chamber for accommodating an object to be heated; and a heating chamber provided with the heating chamber disposed through a partition plate. And a cooling fan that introduces external air to cool the magnetron, and a heating chamber door that opens and closes the opening of the heating chamber. An air passage for branching and introducing the external air introduced by the cooling fan is provided at the front position, and the introduced external air is used as an air curtain along the inner surface of the heating chamber door in this air passage. It is characterized in that an intake port for flowing out is formed. According to this configuration, since the external air flows out from the intake port formed in the air passage into the heating chamber as an air curtain, the external air flowing into the heating chamber does not stagnate. The external air that has finished flowing without stagnation contains steam generated from the object to be heated and is quickly discharged. In addition, since the external air at this time flows in along the inner surface of the heating chamber door, the liquefied vapor generated from the object to be heated does not adhere to the inner surface of the heating chamber door.

In the cooking device according to a second aspect of the present invention, an air passage for branching and introducing external air introduced by a cooling fan is provided at a position in front of the ceiling of the heating chamber. In the air passage, a dividing plate arranged along a direction orthogonal to the flowing direction of the introduced external air is installed, and external air is supplied to the air passage located closer to the cooling fan than this dividing plate. An intake port is formed to flow out as an air curtain along the inner surface of the heating chamber door, while an exhaust port is formed in an air passage located farther than the cooling fan, through which external air flowing out of the intake port flows. It is characterized by being. According to this configuration, the same operation as that of the first aspect is ensured. Furthermore, the heating cooker according to claim 3 of the present invention is as described in claim 1 or claim 2, and a lighting device for illuminating the inside of the heating chamber is arranged near the air inlet of the air passage. It is characterized by the following. According to this configuration, the luminaire is cooled by the external air flowing out of the air inlet formed in the air passage, so that the life of the luminaire can be extended. In addition, since the external air preheated by the lighting device flows along the inner surface of the heating chamber door, there is an advantage that the liquefied vapor is more difficult to adhere to the inner surface of the heating chamber door. can get.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIG. 1 is an external perspective view showing a simplified configuration of a heating cooker according to Embodiment 1, that is, a microwave oven.
FIG. 2 is a cross-sectional view illustrating a front cross-sectional configuration, a right cross-sectional configuration, and a flat cross-sectional configuration of the cooking device illustrated in FIG. 1. The electrical configuration and operation of the cooking device according to the first embodiment are basically the same as those of the conventional cooking device, and therefore the description thereof is omitted, and FIGS. 1 to 4 are the same as or similar to those of FIGS. Corresponding parts and portions are denoted by the same reference numerals.

In the heating cooker according to the first embodiment, a heating chamber 1 in which an object to be heated is stored and a partition plate 2
And a magnetron 3 that supplies microwaves into the heating chamber 1 after being disposed through the inside, and introduces external air A from an air inlet 5 formed on the bottom surface of the cooking device main body 4 provided with these components. The cooling fan 6 is configured to include a cooling fan 6 that cools the heating chamber 3 and a heating chamber door 7 that opens and closes the opening of the heating chamber 1 so that the magnetron 3 is cooled after being introduced by the cooling fan 6. Outside air A
Are discharged to the outside through an air discharge port 8 formed on the back surface of the cooking device main body 4. In the drawing, reference numeral 14 denotes an operation panel, 21 denotes a turntable, and the operation panel 14 is disposed at a position on the front side of the cooking device main body 4.
Is used for menu selection and setting of heating time, while a turntable 21 arranged in the heating chamber 1 rotates an object to be heated placed for heating and cooking.

An air passage 22 is provided at a position in front of the ceiling of the heating chamber 1 for branching and introducing the external air A introduced by the cooling fan 6 before cooling the magnetron 3. An intake port 23 for allowing the introduced external air A to flow out as an air curtain along the inner surface of the heating chamber door 7 into the air passage 22, that is, an intake port 23 in which a plurality of circular holes arranged in parallel to each other are gathered. Are open in the downward direction. In addition, although the inlet port 23 is not limited to the above-described configuration and is not shown, the inlet port 23 may be configured by a plurality of slits formed parallel to the direction in which the opening of the heating chamber 1 expands. Of course, it is good. A lamp 15, which is a lighting device for illuminating the inside of the heating chamber 1, is provided near the air inlet 23 of the air passage 22. The lamp 15 is connected to the external air flowing through the air passage 22. A is to be cooled by exposure to A. Note that the external air A is preheated to a small extent as the lamp 15 is cooled, and the preheated external air A flows out of the intake port 23.

Further, both side surfaces of the heating chamber 1 at this time are expanded outward in order to enlarge the outer shape of the turntable 21 and increase the amount of the object to be heated. An exhaust port 25 formed of a plurality of circular holes arranged in parallel is formed in the side plate 24 facing the above. Therefore, an air passage 2 provided at a position in front of the ceiling of the heating chamber 1 is provided.
The external air A flowing through the heating chamber 1 and flowing out of the suction chamber 23 into the heating chamber 1 flows into the heating chamber 1 and then flows into the exhaust port 25 formed in the side plate 24, and is cooked. The air is discharged to the outside from the air discharge port 26 formed on the bottom surface of the container body 4. Of course, the exhaust port 25 is not limited to a plurality of circular holes, but if the circular hole serving as the exhaust port 25 is formed entirely on the side plate 24, the heating chamber The resistance given to the external air A flowing out of the heating chamber 1 becomes small,
That is, there is an advantage that the flowability of the external air A can be improved. At this time, the total area of the exhaust port 25 may be set larger than the total area of the intake port 23,
By doing so, the advantage that the air permeability of the heating chamber 1 can be further improved is secured.

Therefore, when the above configuration is adopted, the external air A introduced by the cooling fan 6 and branched off by the air passage 22 is supplied to the intake air formed in the air passage 22. The air flows out from the port 23 toward the inside of the heating chamber 1, but since the air inlet port 23 is formed by a plurality of circular holes, the external air A flows out in a state like an air curtain. That is, the external air A flowing out of the air inlet 23 flows along the inner surface of the heating chamber door 7 and then flows into the heating chamber 1. That is, since the external air A at this time flows into the heating chamber 1 while forming an air curtain extending along the entire surface of the heating chamber door 7, the external air A flowing into the heating chamber 1 is partially The external air A which has flowed through the heating chamber 1 without stagnation, contains steam generated from an object to be heated, and then has an exhaust port 25 formed in the side plate 24 of the heating chamber 1. And then discharged. At this time, since the external air A flowing out of the air inlet 23 flows in along the inner surface of the heating chamber door 7, the vaporized and liquefied vapor generated from the object to be heated is discharged from the heating chamber door 7. It will not be possible to adhere to the inner surface, that is, the glass window 7a provided in the heating chamber door 7, and to fog.

In the cooking device according to the first embodiment, an air passage 22 is provided at a position in front of the ceiling of the heating chamber 1, and external air A introduced into the air passage 22 is supplied to the heating chamber door 7. The air inlet 23 is formed to flow out as an air curtain along the inner surface of the device. However, the present invention is not limited to such a configuration.
It is also possible to employ a configuration as described below.

(Embodiment 2) FIG. 5 is a front sectional configuration of a heating cooker according to Embodiment 2, and FIG. 6 is a sectional view showing its planar sectional configuration. Note that the overall configuration of the heating cooker according to the second embodiment is basically the same as that of the heating cooker according to the first embodiment, and therefore is the same as or equivalent to each of FIGS. 1 to 4 in FIGS. The same reference numerals are given to the parts and parts to be described, and the detailed description is omitted here.

That is, in the heating cooker according to the second embodiment, similarly to the first embodiment, a heating chamber 1 in which an object to be heated is stored, and the heating chamber 1 is arranged via a partition plate 2. A magnetron 3 for supplying microwaves into the heating chamber 1, a cooling fan 6 for introducing external air A to cool the magnetron 3, and a heating chamber door 7 for opening and closing the opening of the heating chamber 1. An air passage 22 for branching and introducing the external air A introduced by the cooling fan 6 is provided at a position in front of the ceiling of the heating chamber 1. Different from the first embodiment, a split plate 31 is installed in the air passage 22 at this time, which is arranged along a direction orthogonal to the flow direction of the external air A that has been branched and introduced. An air inlet 23 is formed in the air passage 22a closer to the cooling fan 6 than the dividing plate 31 to allow the external air A to flow out as an air curtain along the inner surface of the heating chamber door 7. On the other hand, the exhaust port 3 into which the external air A flowing out from the intake port 23 flows again into the air passage 22b located farther from the cooling fan 6.
2, that is, an exhaust port 32 formed by gathering a plurality of circular holes arranged in parallel with each other.

Therefore, when such a configuration is adopted, the external air A introduced by the cooling fan 6 and branched off by the air passage 22 is introduced into the air inlet 22 formed in the air passage 22a. The air flows out from 23 as an air curtain, flows along the inner surface of the heating chamber door 7, and is discharged from an exhaust port 25 formed in the side plate 24 of the heating chamber 1 and an exhaust port 32 formed in the air passage 22 b. Will be done. In this case, the external air A that has flowed into the heating chamber 1 does not stagnate partially, and the external air A that has flowed through the heating chamber 1 without stagnation is generated by the heating chamber door 7. Air passage 2 after flowing along the inner surface
Since the gas flows out through the exhaust port 32 of 2b, the vapor generated from the heated object and liquefied is provided on the inner surface of the heating chamber door 7, that is, on the heating chamber door 7. No fogging by adhering to the glass window 7a will occur.

[0017]

According to the heating cooker according to the first aspect of the present invention, since the external air flows out as an air curtain from the air inlet formed in the air passage into the heating chamber, The inflowing external air does not stagnate, and the external air that has flowed through the heating chamber without stagnation contains steam generated from the object to be heated and is quickly discharged. In this case, since the external air flows in along the inner surface of the heating chamber door, the effect that the vaporized liquid generated from the object to be heated does not adhere to the inner surface of the heating chamber door can be obtained. Can be

According to the heating cooker according to the second aspect of the present invention, the air curtain is formed over the entire inner surface of the heating chamber door, and the same operation and effect as in the first aspect are secured. You. According to the cooking device according to the third aspect of the present invention, the lighting fixture is cooled by the external air flowing out from the air inlet formed in the air passage, so that the life of the lighting fixture can be extended. It becomes possible. Further, since the external air preheated by the lighting device flows in along the inner surface of the heating chamber door, the effect that the liquefied vapor hardly adheres to the inner surface of the heating chamber door can be obtained.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing the entire configuration of a heating cooker according to Embodiment 1.

FIG. 2 is a cross-sectional view showing a front cross-sectional configuration of the heating cooker according to Embodiment 1.

FIG. 3 is a cross-sectional view showing a right-side cross-sectional configuration of the heating cooker according to Embodiment 1.

FIG. 4 is a cross-sectional view showing a flat cross-sectional configuration of the cooking device according to the first embodiment.

FIG. 5 is a cross-sectional view showing a front cross-sectional configuration of a heating cooker according to Embodiment 2.

FIG. 6 is a cross-sectional view showing a flat cross-sectional configuration of a heating cooker according to Embodiment 2.

FIG. 7 is a cross-sectional view showing a right-side cross-sectional configuration of a heating cooker according to a conventional mode.

FIG. 8 is a cross-sectional view showing a flat cross-sectional configuration of a heating cooker according to a conventional mode.

FIG. 9 is a circuit diagram showing an electrical configuration of the cooking device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating room 2 Partition plate 3 Magnetron 6 Cooling fan 7 Heating room door 22 Air passage 23 Inlet A External air

Claims (3)

[Claims] 1. A heating chamber for accommodating an object to be heated, a magnetron that is arranged through a partition plate and supplies microwaves to the heating chamber, and a magnetron that introduces external air to the heating chamber. A heating cooker comprising: a cooling fan for cooling; and a heating chamber door for opening and closing the opening of the heating chamber so as to be openable and closable. The external air introduced by the cooling fan is branched to a position in front of a ceiling of the heating chamber. The heating is characterized in that an air passage through which the introduced external air flows out as an air curtain along the inner surface of the heating chamber door is formed in the air passage. Cooking device. 2. A heating chamber for accommodating an object to be heated, a magnetron which is arranged via a partition plate and supplies microwaves into the heating chamber, and a magnetron which is supplied with external air to form a magnetron. A heating cooker comprising: a cooling fan for cooling; and a heating chamber door for opening and closing the opening of the heating chamber so as to be openable and closable. The external air introduced by the cooling fan is branched to a position in front of a ceiling of the heating chamber. An air passage for introducing air is provided, and a dividing plate is installed in the air passage along a direction orthogonal to the flowing direction of the introduced external air. The air passage located closer to the cooling fan is formed with an intake port for allowing external air to flow out as an air curtain along the inner surface of the heating chamber door, while the air passage located farther from the cooling fan is Cooking device wherein the exhaust port outside air flowing out from the intake port flows are formed. 3. The heating cooker according to claim 1, wherein a lighting device for illuminating the inside of the heating chamber is provided near the air inlet of the air passage.