KR19980022696U - Microwave Tray Driver - Google Patents

Abstract

The present invention discloses an improved tray drive of a microwave oven.

In the related art, since the tray on which food is placed is simply rotated on the bottom plate of the cooking chamber, high frequency radiation emitted from one side wall of the cooking chamber is concentrated only on a specific portion of the food chamber, making it difficult to uniformly cook.

In the present invention, the actuator is installed in the cabinet to raise and lower the tray, the actuator is rotatably coupled to the piston rod end of the actuator, and one end of the support rod connected to the lower surface of the tray extends coaxially and the outer gear is formed with a coupler And a tray motor fixed to the piston rod of the actuator through a support plate to rotate the tray in accordance with a cooking signal, and a drive gear fixed to the rotary shaft of the tray motor to be engaged with the driven gear of the coupler. By doing so, the food can be cooked uniformly.

Description

Microwave Tray Driver

The present invention relates to a microwave oven, and more particularly, to an apparatus for driving a tray on which food is placed.

Microwave oven is a device that cooks by molecular resonance of food by irradiating food to be cooked with high frequency oscillated from magnetron, unlike heating cooking method that cooks food directly by heating. It can be cooked without burning, as well as the advantages that can be cooked evenly.

1 schematically illustrates an example of such a microwave oven. This is done by placing food W to be cooked on a tray 6 provided in a cavity 2 of a cabinet 1 and closing and operating a door (not shown). A high frequency oscillates in the magnetron 4 of (). The oscillated high frequency wave is irradiated into the cooking chamber 2 by a waveguide 5 of one side of the cooking chamber 2. At the same time, the tray 6 is rotated along the support roller 8 by the tray motor 7, so that the food W is uniformly cooked. The remaining code 9 is a cooling fan.

However, the high frequency is irradiated into the cooking chamber 2 from one side wall of the cooking chamber 2, the tray (6) on which the food (W) is placed on the bottom surface of the cooking chamber (2) simply rotates because most of the high frequency food It is absorbed by the side part of (W). Thereby, there was much concern that the upper part of the food W may be overcooked or the lower part would be uncooked. Therefore, the conventional microwave oven has a problem in that the food W cannot be uniformly cooked despite the rotation of the tray 6.

It is an object of the present invention to provide a tray driving apparatus of a microwave oven which can cook food as uniformly as possible by rotating and raising and lowering the tray in view of the above-described conventional problems.

In order to achieve the above object, a tray driving apparatus of a microwave oven according to the present invention includes a magnetron for oscillating high frequency and irradiating into a cooking chamber, a tray for placing foods to be cooked in the cooking chamber, and using the tray in a cooking chamber. In a microwave oven having a support roller or the like supporting rotatably on a plate, an actuator installed in a cabinet and lifting and lowering the tray, and rotatably coupled to a piston rod end of the actuator, the tray being one end of the tray. The support rod is connected to the lower surface of the coaxial extension and the outer circumference coupler (coupling gear) is formed on the outer periphery, the tray motor is fixed to the piston rod of the actuator through the support plate to rotate the tray according to the cooking signal and The driven gear fixed to the rotary shaft of the tray motor is coupled with the driven gear of the coupler. Characterized in that the configuration in comparison.

According to one preferred feature of the present invention, the hub that is engaged with the engaging projections on the lower surface of the tray through the bottom plate of the cooking chamber is fixed to the tip of the coupler.

Accordingly, the present invention, as the tray is rotated at the same time ascend the inside of the cooking chamber, food is uniformly cooked compared to the prior art, thereby exhibiting a great effect on improving cooking performance and reliability of the microwave oven.

1 is a cross-sectional view schematically showing an example of a general microwave oven,

2 is a cross-sectional view showing a tray driving apparatus according to the present invention,

3 is a cross-sectional view illustrating the coupler of FIG. 2.

* Description of the symbols for the main parts of the drawings *

1: Cabinet 2: Cooking room

4: magnetron 6: tray

8: Support roller 11: Actuator

13: coupler 14: support rod (of coupler)

15: (coupler) driven gear 16: hub

17: tray motor 19: drive gear

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the microwave oven according to the present invention is provided with a cooking chamber (2) in which food (W) is cooked on one side of the cabinet (1), and is opened and closed from the outside by a door (not shown), and the electrical equipment room on the other side. (3) is provided. On the bottom plate 2a of the cooking chamber 2, a disc-shaped tray 6 on which the food W to be cooked is placed is rotatably supported on the guide roller 8. In the electric compartment 3, a wave guide 5 for inducing high frequency to the cooking chamber 2 is fixed to the outer wall surface of the cooking chamber 2, and the wave guide 5 is driven by a cooking signal to generate a magnetron for oscillating high frequency. (4) is installed.

Meanwhile, according to a feature of the present invention, a bracket (bracket: 10) is installed on the bottom plate of the cabinet (1) under the cooking chamber (2), and the tray (10) is raised and lowered by an appropriate stroke. The actuator 11 is fixed in the vertical direction. The actuator 11 may be constituted by a hydraulic or pneumatic cylinder or a solenoid. In the present embodiment, the actuator 11 is configured by, for example, a hydraulic cylinder. The coupler 13 is rotatably coupled to the tip of the piston rod 12 of the actuator 11. At one end of the coupler 13, a support rod 14 having a predetermined length, which is connected to the lower surface of the tray 6, is formed to extend coaxially. The hub 16 engaged with the engaging protrusions 6a on the lower surface of the tray 6 through 2a) is fixed. Preferably, a stopper 20 is provided on the piston rod 12 of the actuator 11 to limit the position of the coupler 13.

In addition, one end of the support plate 18 is fixed to the piston rod 12 of the actuator 11, and the tray motor 17 for rotating the tray 6 at an appropriate speed according to the cooking signal on the other end side of the support plate 18. Is installed. To this end, the drive gear 19 is fixed to the rotating shaft of the tray motor 17, and the driven gear 15 to be engaged with the drive gear 19 of the tray motor 17 is formed on the outer circumference of the coupler (13).

Referring to the operation of the tray driving apparatus of the microwave oven according to the present invention configured as described above are as follows.

First, the food W to be cooked is placed on the tray 6 by opening the door. Then, when the door is closed and the microwave oven is operated, a high frequency is oscillated in the magnetron 6 and irradiated into the cooking chamber 2. At the same time, the actuator 11 is driven to raise and lower the piston rod 12 so that the tray 6 moves up and down the inside of the cooking chamber 2 by the support rod 14 of the coupler 13. At this time, since the tray motor 17 is also fixed to the piston rod 12 by the support plate 18, the tray motor 17 is moved up and down simultaneously with the driving of the actuator 11.

In this way, when the actuator 11 is driven, the tray motor 17 is also driven simultaneously so that the drive gear 19 fixed to the rotating shaft is driven together. Accordingly, the coupler 13 is rotated with respect to the piston rod 12 of the actuator 11 by the driving gear 19 and the driven gear 15 engaged with the drive gear 19 so that the tray 6 rotates in a predetermined direction.

Therefore, since the tray 6 rotates in the cooking chamber 2 and rotates, the entire portion of the food W is evenly exposed to the high frequency, so that the concentration of the high frequency on a specific portion is suppressed to the maximum as in the prior art, thereby making it very uniform. Cooking becomes possible.

As described above, according to the present invention, since the tray moves up and down at the same time as the cooking chamber, the concentration of the high frequency to a specific portion of the food as in the prior art is suppressed as much as possible, so that the whole food is evenly exposed to the high frequency. Therefore, the food can be cooked more uniformly than in the prior art. Therefore, the present invention has an excellent effect of greatly improving the cooking performance and reliability of the microwave oven.

Claims (2)

In a microwave oven comprising a magnetron for oscillating a high frequency into the cooking chamber, a tray for placing food to be cooked in the cooking chamber, a support roller for rotatably supporting the tray on the bottom plate of the cooking chamber. , An actuator 11 installed in the cabinet 1 to lift the tray 6; Rotatingly coupled to the distal end of the piston rod 12 of the actuator 11, one end of the support rod 14 connected to the lower surface of the tray 6 extends coaxially and the driven gear 15 is formed on the outer circumference With a coupler (13), A tray motor 17 fixed to the piston rod 13 of the actuator 11 through a support plate 18 to rotate the tray 6 according to a cooking signal; And a drive gear (19) fixed to the rotating shaft of the tray motor (17) to be engaged with the end gear (15) of the coupler (13). The hub 16 of claim 1, wherein the hub 16, which engages with the engaging protrusions 6a on the bottom surface of the tray 6, is fixed to the tip of the coupler 13 by passing through the bottom plate 2a of the cooking chamber 2. Microwave tray drive device.