JPS6136621A - Heating device - Google Patents

Abstract

PURPOSE:To enable the automatic heating by a method wherein the weight of an object to be heated is measured, then a heating time, heating temperature, heating output and heating mode are controlled according to the measured weight. CONSTITUTION:At the loading of an object to be heated 28 on a rotary pan 26, the weight is applied to the free end of the Roberval's mechanism via a rotary securing table 27 and a rotary axis 20, the free end is deviated downward according to the weight. The Roberval's mechanism is vibrated by the shock at the loading of the object to be heated 28 or by the shock for the Roberval's mechanism applied later from outside, the vibration is generated by the peculiar vibration frequency according to the measured weight. By the generated vibration, an induced voltage is generated between a magnet 18 fixed on the free end and a coil 19 fixed on the fixed end. By detecting the voltage, the whole weight can be measured. By controlling the oscillation of a magnetron according to the weight of the object to be heated 28, the heating cooking can be performed by the optimum heating output and heating time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention measures the weight of an object to be heated, and adjusts f according to the weight.
The present invention relates to a weight detection device for a heating device that enables automatic heating by controlling heating time, heating temperature, heating output, heating method, etc.

Conventional structure and its problems In conventional manual type high frequency heating equipment, for example,
When reheating cold rice, miso soup, etc., cooking vegetables, or thawing frozen foods, the user should measure the weight of the food,
Depending on the weight, it is necessary to set the heating time and heating output using the time switch and output selection button. Therefore, cumbersome operations such as measuring the weight of the food, setting the heating time, and heating output are required before starting cooking, and there is a desire for improved usability.

High-frequency heating devices with automatic control functions are equipped with sensors that have been developed in recent years to detect the surface temperature of food, water vapor, alcohol, etc. generated from food, and determine the heating time and temperature of the food. Output is automatically controlled.

Among these automatic heating devices, those equipped with infrared sensors that detect the surface temperature of food mainly only detect the surface temperature of a part of the food, but cannot detect the internal temperature or heating state. However, the results were uneven depending on the shape and weight. On the other hand, water vapor generated from food
Products equipped with a gas sensor that detects p-alcohol, etc. can detect water vapor and produce good results when reheating or cooking raw vegetables such as vegetables, but they cannot detect food that does not generate water vapor, such as when defrosting. You, who can't do it,
Like the manual type, it takes time and effort to measure the weight of the food to be thawed, select the timer volume and output selection key, and then start cooking.

Therefore, in order to eliminate these drawbacks and to ensure good heating without failure, it is desirable to have a device that can automatically measure the weight of food and cook with the optimal heating time, heating output, and heating method. Marete f co.

Purpose of the Invention The present invention solves the above-mentioned conventional problems, and allows accurate weight measurement with a simple configuration, and allows good heating to be performed automatically without setting the heating time, heating output, or heating method. The purpose is to provide a heating device that is easy to use and convenient.

Structure of the Invention To achieve the above object, the heating device of the present invention incorporates a rotary mounting table, a motor, gears, etc. into a Roberval mechanism composed of a plurality of leaf springs and an aluminum block, and the movement of the Roberval mechanism is controlled by a magnet. By adopting a configuration in which the weight is detected using a coil, the weight detection device can be made lighter and thinner, and the detection portion can be integrated, making accurate weight measurement possible.

By doing so, the trouble of setting the heating time, heating output, and heating method is saved, and the optimum heating time and heating output are always automatically set, which has the effect of providing stable heating. It is something.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross-sectional view of a high-frequency heating device that is an embodiment of the present invention. In the figure, reference numeral 1 denotes a heating chamber for storing and heating food, and a door 2 is provided in front of the heating chamber so that it can be opened and closed. 3
is a magnetron that supplies high frequency waves to the heating chamber 1. The high frequency waves are oscillated from the magnetron 3, pass through the waveguide 4, and are irradiated onto the object to be heated 61 placed on the rotating plate 5 in the heating chamber 1, thereby heating it. do. The rotating plate 5 is placed on the rotating mounting table 7.

The rotary mounting table 7 is installed on the bottom of the heating chamber 1 (passes through an opening and is fitted onto a shaft 8, and the drive of the motor 9 is transmitted to the shaft 8I by two gears 10 and 11. Rotation mounting 7 is being rotated.

FIG. 2 is a detailed view of the Roberval mechanism, which is a weight detection device, and FIG. 3 shows the mechanical parts thereof. Next, details of the weight detection device will be explained with reference to FIGS. 2 and 3.

As for the structure of the Roberval mechanism, two aluminum blocks AI2 and a block 813 are connected by a plurality of leaf springs 14. The overlapping surfaces of the aluminum block A13 and the plate spring 14 are fixed by a holding plate 15, and the overlapping surfaces of the aluminum block A12 and the plate spring 14 are fixed by a magnet mounting plate 16 and a motor mounting plate 17.

A magnet 18 is fixed to the tip I of the magnet mounting plate 16, and a coil 19 is fixed to the aluminum block B13, and the weight is detected from the magnet 18 and the coil 19i.

Rotating the motor mounting plate 17i rotating shaft 20
The shaft drive motor 21 is fixed by a screw 221, and a gear A24 is fitted onto the shaft 23 of the motor 21. The rotating shaft 2 (H) is fitted with a gear B25, and is housed in the notch in the center of the aluminum block AI2.
The holes provided in and the bearings 31 prevent back and forth rattling.

The rotation of the drive motor 21 is controlled by gear A24 and gear B2.
5 to the rotating shaft 20. Furthermore, a rotating mounting table 27 on which a rotating plate 26 is mounted is fitted to the rotating shaft 20, and during high frequency heating, the object to be heated 28 is rotated.
It is heated evenly.

FIG. 4 is a sectional view showing the mounting structure of the Roberval mechanism. In the figure, 13 is the fixed end side aluminum pro 7B of the Roberval mechanism, and 30 is its mounting plate.

The aluminum block B13 is attached to a strong metal mounting plate 30 fixed to the bottom surface of the heating chamber 29 with screws 31 to fix one end of the Roberval mechanism, and vibrate the other end to which the rotating shaft 20 is attached.

Further, the aluminum block B13 has a convex shape, and the mounting plate 30 has a planar shape, so that it can be mounted even in a narrow space such as the T-coat fixed at both ends of the convex surface or the bottom surface of the heating chamber 29.

The operation of the above configuration will be explained below.

When the object to be heated 28 is placed on the rotating plate 26, its weight is applied to the free end of the Roberval mechanism via the rotating mounting table 27 and the rotating shaft 20, and is displaced downward in accordance with the weight. This movement is always a vertical shift in the poetics of the Roberval mechanism. Then, the object to be heated 28 is placed and the impact at 15 o'clock or
After that, when the Roberval mechanism is vibrated by an impact applied to the Roberval mechanism from the outside, it vibrates at a natural frequency of f corresponding to its weight number. This vibration generates an induced voltage in the f-coil 18 fixed at the free end and in the f-coil 19 fixed at the fixed end, and by detecting this, the overall weight can be measured. However, if the weight of the rotating plate 26, rotating mounting table 27, motor 21, gears 24, 25, and aluminum block A is measured in advance, it is possible to measure only the weight of the heated object 28 from the total weight. become.

If the oscillation of the magnetron is controlled according to the weight of the object to be heated 28, cooking can be performed with optimum heating output and heating time.

As described above, according to this embodiment, by constructing the Roberval mechanism using an aluminum block, it can be made lightweight, and the load applied to the free end of the Roberval can be reduced as much as possible. First, the measurement range of the heated object is expanded, and the stress on the regular leaf spring can be reduced, resulting in stable vibration.
The durability of the entire Roberval mechanism is also improved.

In addition, by devising the mounting structure of the aluminum block on the fixed end side of the Roberval mechanism and housing the gears and rotating shaft inside the aluminum block on the free end side, the entire weight detection device can be made thinner, and the bottom surface of the heating chamber It has the advantage that it can be installed even in places with little space, such as.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) By constructing Roberval from aluminum, which has the lowest specific gravity among metals, the weight of the entire weight detection device can be reduced, and the weight ratio of the heated object to the total weight 1 can be increased.
Not only can accurate weight measurement be performed, but the measurement range of heated objects can also be expanded.

? ) Even when the object to be heated is placed on the plate spring, the load of the motor, gears, rotary mounting table, and aluminum block is always applied to the plate spring, so this stress can be reduced.
It has been stable for many years and can obtain one vibration, allowing accurate weight measurement. The durability of the robot mechanism is also improved.

(3) If you control the output of the heating function via the control unit by measuring the weight of the object to be heated, you can optimize the heating time and heating output without having to set the heating time, heating output, and heating method each time. Since it can be cooked using a heating method, it is convenient and easy to use without any troublesome effort.

However, if the circuit is configured to prevent so-called dry firing operation, in which the product is heated incorrectly when the object to be heated is not inserted, the device will be safer.

4. The fixed end side of the Roberval mechanism can be made thinner by making the aluminum block on the fixed end side into a convex shape and by rubbing the mounting plate to which it is attached into the same shape. Alternatively, the free end side can also be made thinner by providing a notch in the center of the aluminum block on the free end side and storing the gear and rotating shaft therein. In this way, the weight detection device as a whole can be made compact and has a shape that can easily fit into the bottom of the heating chamber. Therefore, it is also possible to house the weight detection device within the same external dimensions as the conventional heating device.

(5) In heating devices for cooking at high temperatures such as oven cooking, the heat in the heating chamber is conducted through the rotating mounting table and rotating shaft.
The heat is transmitted to the Roberval mechanism, but the heat is radiated through the aluminum block that makes up the Roberval, and the heat is not transmitted to the magnet, coil, or drive motor that is the weight detector, eliminating deformation and malfunction due to heat, and making it stable. It is possible to measure the weight.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing the structure of a heating device according to an embodiment of the present invention, Fig. 2 is a sectional view showing the structure of a weight detection section of the heating device, and Fig. 3 is an exploded view of the heating device. , FIG. 4 is a partial cross-sectional view showing the mounting structure of the weight detection section of the heating device. 12 ・Aluminum block A513...Aluminum Pro 7
B114 ・Plate spring, 16, 17. 18... Magnet,
19...Detection coil, 20 Rotating shaft, 21-...Drive motor, 24 Gear A125 ・Gear B, 26 ・
Rotating plate, 27 Rotating mounting table, 28 - Heated object.・Name of agent: Patent attorney Toshi Nakao (1 idiot) Figure 3 Figure 4

Claims (4)

[Claims] (1) A heating chamber for storing an object to be heated, a means for heating the object to be heated, a rotating table for placing the object to be heated in the heating chamber, a motor for driving the rotating device, and a rotating table for placing the object to be heated in the heating chamber. The elastic body is equipped with an elastic body that supports a transfer table and a motor, a detector that detects vibrations of the elastic body, and a control device that controls a heating means. The Roberval mechanism integrally supports a rotating mounting table and a motor, detects the weight of the object to be heated on the rotating mounting table with a detector, and controls the heating method and heating time based on the output of the detector. heating device. (2) The heating device according to claim 1, wherein a gear is used as a means for transmitting the rotation of the drive motor to the rotary mounting table. (3) The heating device according to claim 1, wherein a gear for transmitting the rotation of the drive motor to the rotary mounting table is provided in an aluminum block constituting the Roberval mechanism. (4) A mounting plate having a ■ shape for fixing the Roberval mechanism to the bottom surface of the heating chamber is provided, an aluminum block on the fixed end side is made into a convex shape, and the vicinity of both ends of the aluminum block are fixed to the mounting plate. Heating device as described in section.