JPS5944527A - High frequency heating device - Google Patents

Abstract

PURPOSE:To remove the influence of the weight of material to be heated with simple and sure operations by a constitution wherein a weight sensor is provided within a compartment and the shielding wire of the sensor is connected through a terminal arranged onto the wall of the compartment to a control circuit in the high frequency heating device of foodstuff or the like. CONSTITUTION:The weight sensor 9 is placed on a top board 8 and the plug 11 of the shielding wire 10 is inserted in the terminal 12. Material to be heated 2 is placed on the weight sensor 9 and the kind of the material to be heated is set by the selector key on the operating panel (not shown) before cooking is started. Consequently, the heating time is determined based upon the weight detection signal of the weight sensor 9 and a high frequency oscillator 4 is controlled by the control circuit 3. Due to the constitution as mentioned above, the operation becomes simple and sure and yet the influence of the weight can be eliminated.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a high-frequency heating device that heats an object to be heated such as food using high frequency waves, and in particular, to perform appropriate heating without being affected by the weight of the object to be heated. Concerning what can be done.

[Technical background of the invention and its problems]

In high-frequency heating equipment, heating conditions (
For example, it is common to set the heating time), but in addition to this, it is necessary to set the heating conditions according to the weight of the object to be heated. There is a problem in that the operations of measuring the weight and setting the heating conditions based on the measured value are time-consuming and troublesome.

To solve this problem, as shown in FIGS. 1 and 2, the weight of the heated object 2 is measured using a weight sensor 1, and the measured value is inputted to the control circuit 3. It is thought that this will lead to automation, such as controlling the oscillation output of the high frequency oscillator (magnetron) 4.

That is, in the high frequency heating apparatus shown in FIG. 1, the weight sensor 1 is placed outside, and in the high frequency heating apparatus shown in FIG. 2, it is installed near the bottom of the oven chamber 5.

However, these high frequency heating devices had the following problems. Since the weight sensor 1 is located outside, the apparatus shown in FIG. It requires a two-step operation, which is inconvenient. In the device shown in FIG. 2, if the plate 6 on which the heated object 2 is placed does not rotate, the installation of the heavy-duty hinge 1 is simple; In such a case, the motor with a speed reducer is located at the position of the weight sensor 1, making it extremely difficult to retrieve the weight sensor 1.

[Purpose of the invention]

The present invention was devised in order to effectively solve the above-mentioned problems and modifications of high-frequency heating devices.

An object of the present invention is to provide a high-frequency heating device that can perform high-frequency heating easily and reliably by simply placing an object to be heated in an oven, selecting the type of object to be heated, and pressing a cooking start button. It is in.

[Summary of the invention-]

The present invention provides a weight sensor for detecting the weight of an object to be heated inside the oven, and a weight sensor mounted on the inner wall of the oven.
- By providing a connecting terminal for connecting the lead wire, and connecting to this connecting terminal a control circuit that outputs a control signal for controlling the excavation output to the high-frequency oscillator according to the weight of the object to be heated. By simply placing the food in the oven, the weight of the food is measured and the heating conditions are set accordingly, promoting automation of high-frequency heating.

[Embodiments of the invention]

Next, a preferred embodiment of the present invention will be described in detail with reference to accompanying drawings.

As shown in FIG. 3, reference numeral 5 denotes an oven, on the top of which a waveguide 7 is installed, and a high frequency oscillator (magnetron) 4 is attached to the end of the waveguide 7.
The high frequency waves oscillated by the oven 5 are passed through the waveguide 7
It is designed to be placed inside. A top plate 8 is provided at the bottom of the oven chamber 5, and a weight sensor 9 for placing the object 2 to be heated on the top plate 8 and detecting its weight is removably provided. Further, on the inner wall surface of the oven chamber 5, a jack 12 is provided which is a connection terminal for connecting the shield wire 10 of the weight sensor 9 by inserting a plug 11 attached to the tip of the shield wire 10. A control circuit 3 that outputs a compensation signal 11 for controlling the oscillation output of the high-frequency oscillator 4 is connected to this jack 12, and controls the oscillation output according to the weight detected by the weight sensor 9 of the object to be heated 2. Then, the object to be heated 2 is subjected to appropriate high frequency heating. That is, in the control circuit 3, the detected weight value of the heated object 2 is converted into a heating time, and the high frequency oscillator 4 is controlled so as to continue outputting an oscillation output for the converted heating time. The relationship between the weight of the object to be heated 2 and the heating time is as follows:
, B, C, etc.) can be determined in advance through experiments as shown in FIG.
By storing it in the memory, the weight inspection of the object to be heated 2
K can be converted into heating time. In addition,
To set the type of object to be heated 2 before starting high frequency heating,
As shown in FIG. 5, the operation panel 13 is provided with a selection key 14 and a display section 15 indicating the selection of the selection key 14, and after the setting, the cooking start button 16 is pressed.

As the weight sensor 9, as shown in FIG. 6, a load electrical converter 18 (for example, a load cell) that converts a load into electricity is installed in a casing 17 with an open top surface, and the opening 1 m of the casing 17 is made of a flexible material. The heated object mounting table 20 is placed on the load electrical converter 18 via this metal 19, and the heated object mounting table 20 is
It can be configured such that the object to be heated 2 is placed on.

Next, the operation of the present invention will be described.

To use the weight sensor 9, place the weight sensor 9 on the top plate 8'' without removing it, and then connect the plug 11 of the 7-wire 10.
into jack 12. In this state, the weight/weight sensor 9
The object to be heated 2 is placed on the object to be heated table 20, 20 types of objects to be heated are set using the selection keys 14 of the operation panel 13, and the cooking start button 16 is pressed. This button 16 causes the control circuit 3 to output a control signal to the high-frequency oscillator 4 to output an excavation output, and the high-frequency oscillator 4 generates a high frequency, which is transmitted into the open storage 5 via the waveguide γ. The heating time is automatically set based on the weight detected by the weight sensor 9. When the object 2 is placed on the U, the load jl'i of the heated object 2 is applied to the charged electric converter 18 via the flexible metal 19, and the load electric converter 18 Therefore, an electrical output corresponding to the weight is output.This electrical output passes through the shielded wire 10 and is sent to the control circuit 3 via the plug 11 and jack 12.The control circuit 3 outputs the electrical output according to the weight. The detected weight (6) is converted into a heating time according to the specification of the selection key 14 based on the pre-stored relationship between the weight of each type of heated object and the heating time, and the high frequency oscillator 4 is activated for the heating time. A control signal is sent to the high frequency oscillator 4 so as to continue outputting an oscillation output of Therefore, by simply placing the object 2 to be heated in the oven chamber 5, selecting 20 types of objects to be heated, and pressing the cooking start button 16, the heating time will be automatically set. In this case, the load electrical transducer 18 of the weight sensor 9 is radio-norded by the casing 17 and the metal 19, and the transducer 1
Since the electrical output of 8 passes through the shielded wire 10, it is possible to prevent the electrical output sent from the weight sensor 9 to the control circuit 3 from being disturbed by high frequencies within the oven chamber 5. Further, since the metal 19 is flexible, it can transmit radio waves without interfering with the operation of the load electrical converter 18. Further, since the weight sensor 9 only needs to be placed on the top plate 8 and its shield wire 10 is removed from the jack 12 when the plug 11 is removed, it is extremely easy to remove the weight sensor 9. (not shown)
If the weight sensor 9 is removed when heating the object 2 using the weight sensor 9, deterioration of the weight sensor 9 can be prevented.

In addition, the present invention utilizes the fact that the weight of the object to be heated 2 decreases as the high-frequency heating progresses, and detects the change in weight during the high-frequency heating using the quantity sensor 9.
The point at which heating is completed may be determined.

Furthermore, the present invention is not limited to the above-mentioned embodiment, but can also be applied to a high-frequency heating device provided with a plate 6 rotated by a speed reducer (plow motor 21) as shown in FIG. 7. In this case, Placing the heavy wall sensor 9 on the second side of the dish 6 is the same as in the above embodiment, but 1. Rotatably mounted on the wall, shielded wire 1o
and the plug 11, so that the slider 22 is brought into contact with the outer periphery of the jack 12, and the jack 12 and the control circuit 3 are connected via the slider 1'22. There is. The high frequency oscillator 4 is still in the oven 5.
It is installed on the side wall and allows high frequency waves to enter the surface oven 5 without using a waveguide. According to this, even if the plate 6 rotates and the weight sensor 9 rotates, the jack 12 is rotated together with the plug 11, so that 7-
This can prevent the lead wire 10 from being twisted and broken.

Furthermore, since the slider 22 is always in contact with the rotating jack 12, the electrical output of the rotating heavy-air sensor 9 can be reliably transmitted to the control circuit 3. Other configurations, operations, and effects are the same as those of the above embodiment.

〔Effect of the invention〕

As described above, since the present invention is configured, it exhibits the following excellent effects.

(1) A weight sensor is installed inside the oven, a connection terminal is provided on the inner wall of the oven to connect the shielded wire of the weight sensor, and a control circuit for controlling the high-frequency excavator is connected to this connection terminal. By connecting, the weight of the object to be heated will be detected, and high-frequency heating will be performed according to the weight.Therefore, there will be no need to manually set the heating time using a cooking timer, etc., and the weight of the object to be heated will be detected. Just by placing the object to be heated and specifying the type of object to be heated, appropriate heating can be performed automatically. Therefore, the usability of the high-frequency heating device is greatly improved.

(2) Since the weight sensor is provided in the oven, the weight of the object to be heated can be measured while it is in the oven, and the determination of Ll', +111I becomes simple.

(3) Since the connection terminal for connecting the 7-wire of the weight sensor is provided on the inner wall surface of the oven, the weight sensor can be easily removed, improving the maintainability of the 111-meter oven.

(4) By covering the weight processor with a flexible metal, radio wave shielding can be performed without impairing the processor function.

(5) By rotatably installing the connecting terminal on the Otsuki wall inside the oven and connecting the control circuit to the terminal via a slider, even when the 111F on which the heated object is placed rotates, The weight processor can be operated reliably.

(6) It is only necessary to place the weight sensor on a top plate or a plate and connect the 7-wire to the connection terminal, so installation is extremely simple.

(7) It has a simple structure, can be manufactured easily and inexpensively, and is highly versatile.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a conventional high-frequency heating device, FIG. 2 is a schematic longitudinal cross-sectional view showing another example of the conventional high-frequency heating device, and FIG. 3 is a diagram of a high-frequency heating device according to the present invention. 4 is a graph showing the relationship between the weight of various objects to be heated and heating time, and FIG. 5 is a front view showing an example of the operation panel of the apparatus shown in FIG. 3. 6 is a vertical sectional view showing one embodiment of the multi-leafed cenosa used in the device shown in FIG. 3, and FIG. 7 is a schematic longitudinal sectional view showing another embodiment of the high-frequency heating device according to the present invention. be. In the figure, 2 is an object to be heated, 3 is a control circuit, 4 is a high frequency oscillator, 5 is an oven, 9 is a weight processor, 10 is a shielded wire, 12 is a connection terminal (jack), and 19 is a metal. Agent Patent Attorney Makoto Kinutani J41゜No. 1181 Figure 2 Figure 3'; is 4 diagrams ff1s 5 figures

Claims (1)

[Claims] 1. In an apparatus for heating an object placed in an oven with high frequency waves oscillated by a high frequency oscillator, a weight sensor for detecting the weight of the object to be heated is provided in the oven. ,−
1- A connection terminal for connecting the shielded wire of the weight sensor is provided on the inner wall surface of the oven chamber, and the oscillation output is sent to the high-frequency oscillator to the high-frequency oscillator according to the weight of the object to be heated. A high-frequency heating device that is connected to a control circuit that outputs a 1iIIIfI111 signal to be controlled. 2. The high frequency heating device according to claim 1, wherein the weight sensor is covered with a flexible metal and is radio soldered.