JPS6121330B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooking device that uses a high frequency heater for heating.

A conventional example of this type of heating cooker is shown in longitudinal section in FIG. This heating cooker is provided with a magnetron M on the ceiling of the heating chamber R, and irradiates high frequency electromagnetic waves oscillated and output from the magnetron M into the heating chamber R.
A separate heater H is provided on the ceiling of the heating chamber R, and the food mounting table T arranged at the bottom of the heating chamber R is heated by the radiant heat of the heater H.
I try to focus on food F above. As the heater H, a sheathed heater in which a heating element is housed in a metal pipe is generally used, but since the surface of the sheathed heater is covered with a metal pipe, the heat of the heating element is transferred and the surface temperature rises. It takes a considerable amount of time. That is, since the temperature of the surface is inevitably lower than the temperature of the heating element inside the sheathed heater, it is less likely to become red hot and the amount of infrared radiation is small. For this reason, not only does the heating time with the heater become longer, but also the food cannot be sufficiently browned. Some methods have used infrared heaters to solve this problem, but the configuration of the radio wave seal on the heater part is complicated, and so it has not been put into practical use very often.

On the other hand, from an actual cooking point of view, when baking fish etc., it is necessary to heat the surface for a short time to bring it to a focal point while keeping the surface moist. The atmospheric temperature of the heating chamber is controlled by convection heat, and a light browning is sufficient.Furthermore, when cooking prepared foods such as baked potatoes, meat, foil grilled white fish, and gratin, the roasting and atmospheric heating are used together. Heating conditions vary significantly depending on the purpose of cooking.

However, as in the conventional example, the heating chamber R
In a configuration in which only one type of heater H is provided for heating the fish, if the heat generation conditions of the heater H are set to emphasize the roasting function suitable for grilling fish, the finish of cooking due to atmospheric heating will be poor. On the other hand, if the heating conditions are set to be suitable for atmospheric heating, the roasting function will deteriorate; therefore, it is impossible to set heating conditions suitable for all types of cooking. In addition, it is difficult to install multiple types of heaters suitable for each condition in a single heating chamber in order to accommodate all the various heating conditions due to space constraints, and the arrangement between the magnetron M and the magnetron M is difficult. This has the disadvantage that it becomes more complicated and the manufacturing cost increases.

Incidentally, there is also known a heating cooker configured so that the radiant heat of the heater H is positioned vertically depending on the type of cooking, but adjusting the position is troublesome.
It had drawbacks such as insufficient heating adjustment.

Therefore, an object of the present invention is to provide a heating cooker that has a simple configuration and can extremely easily adjust the optimal heating conditions for each of a plurality of types of heating cooking.

An embodiment of this invention is shown in FIGS. 2 to 4. That is, this cooking device has a magnetron 2 provided on the ceiling of a heating chamber 1, a pair of infrared heaters 3, 3 arranged in parallel, and a food mounting table 4 arranged on the bottom of the heating chamber 1 and each of the above-mentioned components. Radiant heat shielding members 5, 5 are rotatably provided between the infrared heaters 3, 3 to adjust and shield the radiant heat of each of these infrared heaters 3, 3 to adjust the amount of radiant heat irradiated to the food F. It is.

Each radiant heat shielding member 5, 5 has a base end 5a, 5a extending outside the heating chamber 1, which is pivotally attached to a part of the vessel body, and a pinion 5b, 5 formed at each base end.
b is engaged with a rack 7, and an operating knob 7a formed at one end of the rack 7 is made to protrude from a slide hole 9 of an operating panel 8 shown in FIG.

The infrared heaters 3, 3 and the radiant heat shielding members 5, 5 are surrounded by wire-mesh-like partition walls 10, 10 that transmit the radiant heat of the infrared heaters 3, 3 into the heating chamber 1 and block high-frequency electromagnetic waves. It is separated from the heating chamber 1 by sub-heating chambers 11, 11.

Incidentally, an opening 11a is provided on the back side of the sub-heating chambers 11, 11, so that the infrared heater 3 can be easily attached through this opening 11a.

The infrared heaters 3, 3 have a heating wire 13 passed through a pipe 12 made of a heat-resistant insulating material such as crystallized glass or quartz that has good infrared transmittance and high heat resistance, and both ends made of a heat-resistant insulating material such as ceramic. It is fixed with heater supports 14, 14, and the heating wire 13 is connected to the power source side from the opening 11a of the sub-heating chamber 11 via a lead wire 15.

In the slide hole 9 of the operation panel 8, when the radiant heat shielding material 5 is located at the bottom of the infrared heater 3, the operation knob 7a is set to "oven high" and a portion of the radiant heat of the infrared heater 3 is set. ``Oven Low'' is displayed at the position corresponding to the position diagonally downward to be shielded, and ``Grill'' is displayed at the position corresponding to the position where irradiation of radiant heat from the infrared heater 3 to the food table 4 is completely allowed. There is.

The operation of this heating cooker will be described below.

When the operation knob 7a is set to "Grill",
The radiant heat shielding material 5 is located at a position where it does not block radiation from the infrared heater 3 to the food table 4, and it is possible to brown fish or the like using a high flame suitable for grilling.

When the operating knob 7a is set to the "oven high" display position, the radiant heat shielding member 5 rotates as shown by the arrow in FIG. The radiant heat is reflected by the radiant heat shielding member 5, and the radiant heat is further reflected by the upper surface of the heating chamber 1, increasing the atmospheric temperature within the heating chamber 1.
On the other hand, by using a temperature controller (its operation knob 16 is shown in FIG. 4), the temperature inside the heating chamber 1 can be maintained at an optimal level and cooking can be carried out by atmospheric heating.

When the operating knob 7a is set to the "Oven Low" display position, the radiant heat shielding member 5 is set to the "grill" position.
This is an intermediate position between "oven high" and "oven high", and can provide heating conditions suitable for cooking side dishes such as baked potatoes and meat using both the roasting function and atmospheric heating.

With this configuration, the food F placed on the food table 4 as described above is heated by the high frequency generated by the magnetron 2, and the heater heating by the infrared heaters 3 is controlled by the operation knob 7a of the operation panel 8. By adjusting the position of the radiation heat shielding member 5, it is possible to adjust the degree of cooking according to various types of cooking.

In addition, since the pipe 12 of the infrared heater 3 is made of a heat-resistant insulating material with good infrared transmittance, the infrared rays emitted from the heating wire 13 are directly irradiated onto the food F, and the food F is sufficiently heated by the radiant heat. is,
In the case of cooking in a microwave oven, it is possible to achieve sufficient focus in an extremely short time, and the heating process is easy, and at the same time, it is energy-saving, resulting in less power consumption and is more economical.

Furthermore, since the pipe 12 is made of an insulating material, it has an extremely low heat capacity compared to a metal body such as a sheathed heater, and is easily heated. Therefore, the heating wire 13 becomes red hot in a short time after electricity is applied to the heating wire 13, and can quickly radiate infrared rays, thereby shortening the heating rise time.

Furthermore, since the infrared heater 3 is housed in a sub-heating chamber 11 surrounded by a wire-mesh partition 10, high-frequency electromagnetic waves are not irradiated, causing sparks, burnout, disconnection, etc. in the heating wire 13. There is no risk of malfunction. Similarly, heater support 1
4. Since the heater components such as the pipe 12 are not irradiated with high frequency, there is no generation of heat or sparks due to high frequency heating, and there is no need to use expensive materials with particularly good high frequency characteristics, making it inexpensive. Can be configured safely. Further, one side of the partition wall 10 has an opening 11a toward the outside of the heating chamber 1;
Since the high frequency waves are shielded by the opening 11a, there is no risk of high frequency waves leaking from the opening 11a.
Due to the presence of the infrared heater 3, the infrared heater 3 can be easily attached and detached from the opening 11a, and the lead wire 15 for energizing the infrared heater 3 can also be easily passed through the opening 11a.

When an infrared heater is used as the heater as in this embodiment, the amount of infrared radiation increases, which not only shortens the heating time, but also brightens the inside of the heating chamber 1, making it easier to see the food F placed on the food table 4. You can also check at a glance whether it is being heated or not.

Furthermore, the partition wall 10 not only shields high frequencies, but also acts as a guard to prevent hands or food F from directly hitting the infrared heater 3, etc.
There is no danger of the device breaking, and the device can be made safe and robust.

As described above, the cooking device of the present invention includes a heating chamber for heating food, a high-frequency oscillator for high-frequency heating that outputs high-frequency waves into the heating chamber, and a heater disposed in the heating chamber for heating the food. and a radiant heat shielding member that is adjustable in position between the food placing table provided in the heating chamber and the heater, so that one type of calorie heater can be used to adjust the heater to suit various types of cooking. The heating conditions can be adjusted very easily, and the structure is simple, so the manufacturing cost does not increase.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing a conventional example, Fig. 2 is a side longitudinal sectional view showing an embodiment of the present invention, Fig. 3 is a longitudinal sectional view of its front part, and Fig. 4 is a front view thereof. . 1... Heating chamber, 2... Magnetron (high frequency oscillator), 3... Infrared heater, 4... Food mounting table, 5... Radiation heat shielding member, 5b... Pinion,
7... Rack, 7a... Operation knob, 8... Operation panel, 9... Slide hole, 10... Bulkhead, 11...
Sub-heating chamber, 12...Pipe, 13...Heating wire, 1
4... Heater support, 15... Lead wire, F...
food.

Claims (1)

[Claims] 1. A heating chamber for heating food, a high-frequency oscillation device for high-frequency heating that outputs high-frequency waves into the heating chamber,
A heating cooking device comprising: a heater for heating the heater disposed within the heating chamber; and a radiant heat shielding member provided so as to be adjustable in position between the food placing table disposed within the heating chamber and the heater. 2. The heating cooking device according to claim 1, wherein the radiant heat shielding member is rotatably supported and whose rotation is adjusted by an operating knob that protrudes outside the device. 3. The cooking device according to claim 1, wherein the heater and the radiant heat shielding member are isolated from the heating chamber by a sub-heating chamber surrounded by a partition wall that transmits radiant heat and blocks high-frequency electromagnetic waves.