JPH10288341A - Microwave heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a dew formation within a heating chamber to be reduced and further enable a uniform heating and cooking with microwave in case that heating and cooking are carried out by microwave and steam. SOLUTION: A heating chamber 3 is provided with a steam blowing port 30 and a supporting shelf 24 for mounting a heated item thereon. A steam direction guide 31 is arranged at a position opposing against the steam blowing port 30 of the supporting shelf 24 and further a water storing section for accumulating water of dew formation is arranged below the supporting shelf 24. With such an arrangement as above, it is possible to reduce dew formation and then to ensure a uniform heating and cooking performance with microwave.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave heating device provided with a steam generating means for heating and cooking quickly while maintaining the quality of food.

[0002]

2. Description of the Related Art A conventional microwave heating apparatus of this kind is
It is described in JP-A-9-173. That is,
A conventional microwave heating device is configured as shown in FIG.

[0003] A microwave heating apparatus main body 1 (hereinafter referred to as a main body) is provided with a heating chamber 3 for accommodating an object 2 to be heated, and a steam generator 4 provided outside the heating chamber 3. I have. The steam generating device 4 includes a steam generating chamber 6 having a sheath heater 5 attached to an outer peripheral surface thereof, and a water supply tank 7 communicating with the steam generating chamber 6.

[0004] The object to be heated 2 is heated and cooked by the microwave 9 generated from the magnetron 8 and the steam 10 heated by the sheath heater 5 and flowing from the steam generating chamber 6 into the heating chamber 3.

[0005]

By heating and cooking with the microwave 9 and the steam 10 in this manner, the food is moisturized by the steam and uniformly by the steam as compared with the case of cooking the microwave 9 alone. By being heated, the food can be satisfactorily cooked. However, in the conventional microwave heating apparatus, as shown in FIG. 4, a rise time of 2 minutes to 4 minutes is required from the time when the sheath heater 5 is energized to the time when steam is actually generated, and it takes time to cook.
The steam 10 is continuously supplied to the heating chamber 3 for 1 to 2 minutes even after the energization of the sheath heater 5 is terminated. In addition, steam 1
When 0 is supplied to the heating chamber 3, the steam 1
0 contacts and dew condensation occurs. When such condensation occurs, the microwaves 9 are absorbed by the condensation, and the distribution of radio waves in the storage of the heating chamber 3 becomes non-uniform, so that uniform heating by the microwaves 9 cannot be performed.

Further, there is a problem that the heating chamber 3 tends to be unsanitary if the dew condensation is generated as described above.

The present invention is directed to a microwave heating apparatus configured to reduce the dew condensation in the heating chamber 3 when cooking with microwaves 9 and steam 10 without deteriorating the uniform heating characteristics of the microwaves. The purpose is to provide.

Another object of the present invention is to provide a microwave heating apparatus which can be cooked quickly when cooking with microwaves 9 and steam 10 and which does not generate steam when food is taken out. I do.

It is another object of the present invention to provide a sanitary microwave heating apparatus in which dew water generated when cooking with microwaves 9 and steam 10 is discharged from a heating chamber.

[0010]

The microwave heating apparatus according to the present invention has a blow-out port for discharging steam on the side wall of the heating chamber, and the supporting shelf for covering the side wall of the heating chamber and supporting a plate on which a heated object is placed. Provided, at the position corresponding to the outlet on the support shelf, to form a steam guide inclined upward,
A water storage section for storing dew condensation water is provided between a side wall of the heating chamber and the support shelf at a lower portion of the support shelf.

[0011] According to the above invention, it is possible to reduce the dew condensation in the vicinity of the outlet of the steam discharged from the outlet, and to obtain a microwave heating device capable of realizing uniform heating cooking by microwaves.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A microwave heating apparatus according to a first aspect of the present invention includes a microwave generating means for irradiating a heating chamber containing a heating object with microwaves, and a steam generating means for supplying steam to the heating chamber. A microwave heater having a blowout port for discharging steam into the heating chamber on at least one of the left and right sides of the heating chamber or the inner wall of the heating chamber, and a dish for covering a side wall of the heating chamber and mounting a heated object. And a steam direction guide that inclines and discharges steam upward at a position corresponding to a steam outlet formed below the side wall of the heating chamber. In addition, the steam is smoothly introduced into the storage, and a water storage portion for storing dewed water between the side wall of the heating chamber and the support shelf is provided below the support shelf. Therefore, it is possible to prevent the dewed water from leaking to the bottom surface of the refrigerator and hinder uniform heating and cooking, thereby enabling uniform heating and cooking by microwave.

According to a second aspect of the present invention, there is provided a microwave heating apparatus, wherein a heating element which generates heat by microwave is applied to a supporting shelf or mixed with a base material constituting the shelf, and the supporting member is supported by the microwave. When the shelf generates heat, the dew condensation water is evaporated, and the dew condensation between the side wall of the oven and the support shelf can be further reduced.

According to a third aspect of the present invention, there is provided a microwave heating apparatus, wherein a means for discharging water from a water storage portion for storing dew condensation water is provided between a side wall of the heating chamber and the support shelf below the support shelf. . Thus, the accumulated dew can be discharged from the heating chamber.

According to a fourth aspect of the present invention, in the microwave heating apparatus, a convex projection is provided as a discharging means at a position of the door that opens and closes the entire opening of the heating chamber, at a position facing the space for storing water. The configuration was provided. With this configuration, accumulated dew can be discharged from the heating chamber.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment) FIG. 1 shows a microwave heating apparatus according to Embodiment 1 of the present invention. FIG. 2 is a detailed view of the present invention, and FIG.
It is a figure which shows Example of 4 and 4.

As shown in FIG. 1 to FIG.
In the main body 1 having a heating chamber 3 for accommodating the heating chamber 3, a heating chamber 3, microwave generating means 11 for radiating microwaves to the heating chamber 3, and steam generating means 12 for generating steam to be supplied to the heating chamber 3 And so on.

A first door 13 for opening and closing the front opening of the heating chamber 3 is attached to the main body 1 so as to be openable and closable, and is opened and closed when the object 2 to be heated is put in and out of the heating chamber 3. .

The second door 14 provided on the left side of the first door 13 is provided with a water supply tank 1 used by the steam generating means 12.
It is attached to the main body 1 by a shaft 16 so that it can be opened and closed when attaching and detaching 5. Reference numeral 17 denotes a window mounted on the second door 14 so that the water level of the water supply tank 15 can be visually checked.

First, the structure of the heating chamber 3 and components set therein will be described. As shown in FIG. 2, the heating chamber 3 has a box-shaped stainless steel plate on the top, bottom, left, and right sides and the depth side. The top plate 21 is a microwave generating means 1
1 is provided so that the antenna unit 22 of the magnetron is not exposed.

Similarly, a bottom plate 23 is provided. next,
Support shelves 24a and 24b are set inside the left and right wall surfaces of the heating chamber 3.

The mounting plate 25 having a large number of holes 26 is inserted into the heating chamber 3 along the supporting rails 24e and 24f of the supporting shelves 24a and 24b, and is vertically moved with respect to the position where the mounting plate 25 is set. Are set.
These heat storage plates 28a and 28b are formed by applying glaze to the entire surface of a plate-like mullite porcelain and firing the same. When irradiated with microwaves, the glaze generates heat, and the heat is stored in the mullite porcelain. .

By keeping the heat storage plates 28a and 28b at 60 to 90 ° C. by microwave heating, the heat storage plates 28a and 28b are heated.
Dew condensation on and around 28b can be almost completely eliminated.

The support shelves 24a and 24b are made of ceramic or plastic. In the case of ceramic, the support shelves 24a and 24b are baked with a glaze similarly to the heat storage plate to easily absorb microwaves. In the case of plastic, an additive such as titanium oxide which easily absorbs microwaves is mixed with the plastic so that the support shelf generates heat by microwave irradiation.

Thus, the left and right wall surfaces 3 are generated by the microwave.
Since the support shelves 24a and 24b mounted on the support shelves 24a and 24b generate heat, the support shelves 24a and 24b and the left and right
a and 3b are also warmed, and dew condensation hardly occurs. The steam generating means 12 includes the boiler 1 attached to the main body 1.
9, an exciting coil 18 wound and arranged outside the boiler 19, a foamed or fibrous metal body 20 arranged inside the boiler 19, and a water supply tank 15 detachable from the main body 1. And a pump 27 for drawing water from the water supply tank 15 and dripping the water into the boiler 19. The foamed or fibrous metal body 20 is heated by induction heating by exciting the exciting coil 18, and quickly rises to a high temperature state. The water flowing down the metal body 17 evaporates immediately on the way and is superheated from the steam discharge port 29. It blows out at 38. The superheated steam 38 blown out from the steam discharge port 29 is discharged upward from a position below the heating chamber 3 through a blowout port 30 configured as follows.

When the superheated steam 38 flows into the heating chamber 3 and there is a wall or the like near the outlet of the steam outlet 30 that obstructs the flow, the superheated steam 38 flows near the outlet and the support shelves 24a and 24b. It enters the gap between the left and right wall surfaces 3a, 3b of the heating chamber 3 and generates considerable dew condensation. Steam outlet 29
Is disposed below the right side surface 3 a of the heating chamber 3 and is attached to the steam outlet 30. The support shelf 24b has an upwardly directed steam direction guide 3 at an angle of 45 ° or more at a portion facing the steam outlet 30.
1 are integrally formed. Accordingly, the superheated steam 38 blown out from the steam discharge port 29 smoothly enters the heating chamber 3 and does not enter the gap between the right side surface 3a of the heating chamber 3 and the support shelf 24a. Released upward.

A control unit 32 constituted by a microcomputer controls heating of the microwave generating means 11 and the steam generating means 12 disposed above and below the heating chamber 3 in accordance with a heating command key 33 inputted from a keyboard 34 of the main body 1. Is controlling. The steam generating means 12 is supplied with power to the exciting coil 18 by an inverter power supply 37 to generate steam.

FIG. 3 is an enlarged view of the lower part of the support shelf 24a (24b). The left and right side surfaces 3a (3
The dew water generated in the gap between b) and the support shelf 24a (24b) spreads and accumulates on the bottom plate 23 of the heating chamber 3. When this water pool is present, microwaves concentrate on it and the object to be heated 2
Has a significant effect on the uniform heating characteristics. Support shelves 24a, 24
At the lower part of b, there are water storage parts 24c and 24d for storing water, and dew water is stored there. These water storage sections 24c and 24d
Is provided in the vicinity of the left and right side surfaces 3a and 3b of the metal heating chamber 3, so that it is hardly affected by radio waves and does not affect the uniform heating characteristics. Further, a projection 38 is provided at a location on the heating chamber 3 side of the first door body 13 opposite to the water storage portions 24c and 24d for storing water, and the accumulated water is provided at a lower portion of the heating chamber 3 through the projection 38. It is received by the gutter 39.
In particular, when the door 13 is opened and closed, the vibration at the time of opening and closing promotes drainage of water.

[0029]

As described above, the microwave heating apparatus according to the first aspect of the present invention is provided with a blowing section for discharging steam in a heating chamber, and covers a side wall of the heating chamber to place a dish on which a heated object is placed. Is provided, and a steam direction guide for discharging steam upwards is formed by inclining at a position corresponding to the steam outlet of the support shelf, so that the superheated steam smoothly flows upward in the refrigerator. In addition to greatly reducing the condensation near the inlet and outlet, there is a water storage section provided at the bottom of the support shelf, so that the water that has condensed can be retained, and as a result, microwaves generated by the condensation water coming out to the bottom of the heating chamber Has the effect of eliminating non-uniform heating. In addition, since the steam direction guide that releases the steam upward is formed by inclining, the superheated steam does not directly hit the object to be heated placed on the mounting plate, so that uniform steam heating can be provided. .

Further, according to the configuration of claim 2, claim 1 is
In the above, a heating element that generates heat by radio waves on the support shelf is applied to the shelf or mixed with a base material constituting the shelf, so that the heat generation suppresses condensation on the side wall of the metal heating chamber and condensation on the support shelf. In addition, there is an effect that total dew can be reduced.

According to a third aspect of the present invention, there is provided the first aspect.
There is a water storage section provided at the lower part of the support shelf, so that dew condensation water can be retained, so that non-uniform heating of microwaves due to condensation water coming out to the bottom of the heating chamber can be eliminated, and microwave uniformity There is an effect that the heating characteristics can be maintained.

Further, according to the configuration of claim 4, claim 1 is provided.
In the item (3), the protrusion provided on a part of the door body facing the water storage portion for storing water can be drained out of the heating chamber by transmitting the accumulated dew water, so that an unsanitary situation due to the water accumulation can be solved. This has the effect.

[Brief description of the drawings]

FIG. 1 is an external view of a microwave heating apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view showing one embodiment of the microwave heating apparatus.

FIG. 3 is an enlarged view of a lower part of a support shelf of the microwave heating apparatus.

FIG. 4 is a cross-sectional view of a conventional microwave heating device.

[Explanation of symbols]

 2 Object to be heated 3 Heating chamber 3a, 3b Side wall 11 Microwave generating means 12 Steam generating means 13 Door 24 Support shelf 25 Placement tray 30 Steam outlet 31 Steam direction guide 38 Projection 39 Gutter

Claims (4)

[Claims] 1. A microwave heating apparatus comprising: a microwave generating means for irradiating a microwave to a heating chamber for storing an object to be heated; and a steam generating means for supplying steam to the heating chamber. Or a blow-out port for discharging steam into a heating chamber provided on at least one inner wall surface, a support shelf for supporting a mounting plate for mounting a heating object on a side wall of the heating chamber, and a support shelf provided on the support shelf. A steam direction guide for discharging steam is provided at a position corresponding to a steam outlet formed below the side wall of the heating chamber, and water condensed between the heating chamber side wall and the support shelf is stored below the support shelf. A microwave heating device comprising a water storage unit. 2. The microwave heating apparatus according to claim 1, wherein the supporting shelf is formed by applying a heating element that generates heat by radio waves to the surface of the shelf or mixing the heating element with a base material constituting the shelf. 3. The microwave heating apparatus according to claim 1, wherein the water storage section has a drainage means for draining the accumulated water. 4. The microwave heating apparatus according to claim 3, wherein the drain means has a projection on a part of the door body facing the water storage section.