JPS6217532A - Heating cooker provided with weight detecting function - Google Patents

Abstract

PURPOSE:To weight the weight of food in a heating chamber automatically and prevent the failure of cooking by providing a cooking table or rails with steps. CONSTITUTION:The rails 4a, 4b at both left and right sides of the heating chamber 2 extend into front-and-rear direction of the same chamber 2 along the side walls of the chamber while the cooking table 3 can be stored into or taken out of the heating chamber 2 by sliding on the rails. The left and right side rails 4a, 4b are supported by connecting bodies 5 at two places at the front side and rear side of the rails and held by rovable mechanisms provided at two places of fore and rear. The cooking table 3 or left and right rails 4a, 4b are provided with steps 4c to limit the position of the cooking table in the heating chamber. According to this method, the cooking table 3 will never contact the door of the heating chamber and correct detection of the weight of foodstuff to be cooked may be effected.

Description

Detailed Description of the Invention: Industrial Application Field The present invention detects the weight of food in a heating chamber and automatically controls the heating time, heating output, heating style, etc. according to the weight, thereby achieving optimal heating. This invention relates to a cooking device that enables cooking.

BACKGROUND ART In a conventional heating cooker shown in FIG. 11, for example, the user weighs the food, inputs the measured weight using the key operation input section 36, and then determines the optimal heating time, heating output, and heating style. etc., were automatically controlled. FIG. 12 shows an enlarged perspective view of the display and operation section of a conventional heating cooker. Key operation consists of a display section 35 that displays heating time, heating output, weight of inputted food, etc., selection key 36a for selecting food type and cooking menu, and numerical input key 36b for inputting time and weight. It is composed of an input section 36.

Problems to be Solved by the Invention However, in such a heating cooker, the user weighs the food before storing it in the heating chamber, then stores the food in the heating chamber, and then presses the key. Input section 3
6, it was necessary to input the weight 1 of the food weighed previously. In this way, the tedious work of weighing was required, making it inconvenient to use. Furthermore, if the measured value or the input value becomes a different value due to a user's erroneous operation, the result of the cooking will be poor. Furthermore, if you accidentally enter a large value for a light food,
There was a problem in that the food would be overheated and there was a risk that the food would burn.

The present invention solves these conventional problems by automatically weighing the food in the heating chamber and automatically setting the optimal heating output, heating time, heating method, etc. according to the weight. By determining and controlling heating, we aim to eliminate cooking failures due to erroneous operation, eliminate measuring work, and realize a heating cooker that is easy to use.

Means for Solving the Problems In order to achieve the above object, the heat cooker with weight detection function of the present invention is provided with a mounting table for placing food, and this mounting table is connected to rails extending back and forth on both sides of the heating chamber. The configuration is as follows. And it will be possible to take this one machine in and out of the heating chamber by sliding it on the rail.

Furthermore, a step is provided on the ia stand or rail to restrict the position of the mounting table in the heating chamber. For example, a step is provided at both the front and rear ends of the rail, and the mounting table fits between the steps to restrict the position. Also, make sure that the mounting table does not come into contact with the rear wall or front door of the heating chamber. Another method is to limit the position by providing a step on the mounting table.

Function: The heat cooker with a weight detection function according to the present invention can automatically detect the weight of the food in the heating chamber, eliminating the need for the user to weigh and input the weight of the food. Further, rails are provided on both sides of the heating chamber, and the mounting table is placed on the rails so that the mounting table can be slid in and out of the heating chamber, making it easy to attach and take out the mounting table. Furthermore, the weight of the mounting platform can be accurately detected without colliding with or touching the rear wall of the heating chamber. In addition, accurate weight detection is possible without the mounting table hitting or touching the front door. This has the above-mentioned effects.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 2 is a partial cross-sectional view of a heat cooker with a weight detection function as an embodiment of the present invention, viewed from the front.

As shown in FIG. 2, the food 1 is placed on the mounting table 3 and stored in the heating chamber 2. This mounting table 3 is placed on a right rail 4a and a left rail 4b provided on both sides of the heating chamber 2. The right rail 4a and the left rail 4b extend in the front-rear direction along the side wall of the heating chamber 2. The mounting table 3 is placed on the rails 4a and 4b on both the left and right sides, and can be slid in the front and back directions to be taken in and out. A connecting body 5 is provided to transmit the loads of the food 1 and the mounting table 3 applied to the left and right rails to the outside through the side wall of the heating chamber 2. In a high-frequency heating cooker, the connecting body 5 must be made of a material that is not affected by high frequencies, thereby preventing leakage of radio waves to the outside of the heating chamber. The load transmitted by the connecting body 5 is held by a support mechanism called a donkey pal mechanism. This donkey pal mechanism forms a parallelogram, the lower side of which is fixed, and the opposite side of this fixed side moves in a row.

That is, the parallel movement fitting 6, the fixed holding fitting 9, and the two parallel holding fittings 7 constitute a parallelogram, and each component is attached at four corners by connecting pins 8 so as to be able to move in parallel. The fixed holding fitting 9 is fixed to the wall of the heating chamber 2, and the parallel movement fitting 6 corresponding to the opposite side thereof is configured to move in parallel. The connecting body 5 is fixedly attached to this parallel movement fitting 6. A load is applied to this parallel motion fitting 6 in the vertical direction. The load of the left and right parallel motion fittings 6 is lifted upward by a hanging fitting 10, and further, the left and right loads are combined and converted in the same direction by a direction conversion fitting 11. This direction conversion fitting 1
1 is attached to the direction changing holding fitting 13 by a connecting pin 8, and the hanging fitting 10 and the load coupling fitting 12 are attached at a 90° position using the connecting pin 8 as a fulcrum. Then, the load on both the left and right sides is concentrated on the load coupling fitting 12, and the load direction is applied from left to right in FIG. The load on this load coupling fitting 12 is detected by a weight detection unit 14.

The heater 18 as a heat source can be attached to the lower side of the heating chamber 2, allowing efficient cooking with good heat distribution. In addition, when heating with high frequency, a high frequency supply port 16 can be provided at the bottom of the heating chamber, and the waveguide 3
It is connected to the magnetron 17 by 8.

FIG. 1 shows a perspective view of the main parts of the heat cooker with a weight detection function according to the present invention. As shown in Figure 1, the food 1 is placed on the mounting table 3.
It is shown that the load is received by the rails 4a and 4b on both the left and right sides. The left and right rails 4a and 4b extend back and forth on the side walls of the heating chamber 2, and the tray table 3 can be moved in and out of the heating chamber 2 by sliding thereon. Each of the left and right rails 4a, 4b is supported by a connecting body 5 at two locations, front and rear, and held by donkey pal mechanisms provided at two locations, front and rear.

The parallel movement fittings 6° of the two front and rear donkey pal mechanisms are integrally constructed and are suspended by a hanging fitting 10.

Now, when mounting the mounting table 3 in the above configuration in a sliding manner into the heating chamber, if the mounting table 3 is installed to a deep position, the mounting table 3 may collide with the rear wall of the heating chamber. Walls may be damaged.

Moreover, if the apparatus is insufficient, when the door 37 provided at the front of the heating chamber 2 is closed, the inside of the door a7 will collide with the mounting table 3, and the door 37 and the mounting table 3 will be damaged.

Moreover, if the mounting table 3 comes into contact with the rear wall of the heating chamber 2, or if the mounting table 3 contacts the door a7, accurate weight detection becomes impossible.

In order to eliminate the above-mentioned problems, steps are provided on the mounting table 3 and the left and right rails 4a and 4b to limit the position of the processing table 3 in the heating chamber. FIG. 3 shows an embodiment in which 68 tables 3 are provided with a step 3a of a processing table. It shows a state in which the position is restricted by the steps 3a of the mounting tables on both the front and rear sides. FIG. 4 shows a case where a rail step 4c is provided on the left and right rails 4b, 4a.

FIG. 6 shows a state in which the load of the mounting table 3 is received by the left rail 4b and transmitted to the outside of the heating chamber 2 by the connecting body 5, and the load is supported by the donkey pal mechanism. The reason why the donkey pal mechanism is used for this supporting part will be explained based on the drawings.

Figure 5 (,) shows the case where the donkey pal mechanism is used,
FIG. 5(b) shows a case where a lever-shaped half metal fitting 39 is used instead of the donkey pal mechanism. First of all, the first reason for using the donkey pal mechanism is that when vertically displacing, parallel movement is performed in Figure 5 (,), and the left rail 4
The upper surface of b is displaced without tilting. However, Fig. 5(b)
Since the left rail 4b rotates around the fulcrum C, the upper surface of the left rail 4b is tilted and becomes unstable. The second reason is that the location where the load is applied, that is, the position of point A, does not affect the weight measurement in FIG. 5(,), but does affect the weight measurement in FIG. 5(b).

That is, in FIG. 5(,), even if the position of point A changes from side to side, the load applied to the hanging fitting 10 at point B does not change. This is one of the characteristics of the donkey pal mechanism and is generally well known. (Reference: Corona Shadai Hekari's Basic Theory and Its Applications (J:), page 122, written by Yoshinobu Okada). However, in Fig. 5(b), a lever is formed with the 0 point as the fulcrum and determined by the ratio of the length between C and A and the length between C and 8, so that the hanging bracket 10 at point B is This load changes greatly as the position of point A changes from side to side. We use donkey pals for these two major reasons.

FIG. 6 is a perspective view of a main part showing the structure of the weight detection unit 14. As already explained with reference to FIG. 1, the explanation has been made until the load of the food 1 placed in the heating chamber 2 is collected on the load coupling fitting 12. In FIG. 6, a configuration for detecting the load collected on the load coupling fitting 12 will be explained.

A force is applied to the load coupling fitting 12 in the direction shown by the arrow, and this force can be received by the lever fitting 19. This lever fitting 19 uses a fulcrum fitting 20 as a fulcrum, and a pressure sensor 21 is placed on the opposite side of the fulcrum.
I am receiving it. Therefore, the force applied to the pressure sensor 21 is a value divided by the lever fitting 19. Further, the fulcrum fitting 20 and the pressure sensor 21 are fixed to the sensor base and positioned accurately. Furthermore, the connecting portion between the load coupling fitting 12 and the lever fitting 19, the connecting point between the lever fitting 19 and the fulcrum fitting 20, the point where the lever fitting 19 presses the pressure sensor 21, etc. are shaped like blades, so that positional deviation and length changes are avoided. It has a shape that does not cause

FIG. 7 shows a sectional view showing the structure of the pressure sensor 21. It has a structure in which a pressure sensitive plate 23 and a substrate 24 are pasted together in parallel at regular intervals via a spacer 25, electrodes 26 are provided on each opposing surface of the pressure sensitive plate 2a and the substrate 24, and lead wires are drawn out from each electrode 26. . Then, the pressure sensitive plate 23 is deformed by applying a force in the direction shown by the arrow in FIG.
3 and the substrate 24 changes. Therefore, pressure plate 2
3 and the electrode 26 provided on the substrate 24 changes, and the capacitance between the electrodes changes. Further, since the pressure sensitive plate 23 deforms in response to the force applied thereto, the capacitance also changes in response to the force. By detecting this change in capacitance, the weight of the food 1 in the heating chamber is detected.

FIG. 8 shows an oscillation circuit 31 that converts changes in capacitance of the pressure sensor 21 into changes in oscillation frequency. Two operational amplifiers OP1 and OF2 are used to convert changes in charging/discharging time to the capacitance of the pressure sensor 21 into an oscillation frequency. FIG. 9 shows the output waveforms of the operational amplifiers OP1.0P2. FIG. 9(,) shows the voltage waveform at the output point B of the operational amplifier OP2, and FIG. 9(b) shows the voltage waveform at the output point A of the operational amplifier OPI. OF2 constitutes an integrating circuit, and its input is the output of OP1. Also, OF1 constitutes a comparator circuit with hysteresis characteristics, and the input is O
The output of F2 is used as input. In this way, a loop is constructed to constitute an oscillation circuit. FIG. 10 is a circuit diagram showing a specific configuration of a control circuit for a heat cooker with a weight detection function as an embodiment of the present invention. The center of control is composed of a microcomputer 27, and commands input from the key operation input section to input terminals 11 to I4 of the microcomputer 27 are decoded within the microcomputer 27, and
A predetermined display is displayed on the display section 35.

On the other hand, the food 1 or f1100 load is applied to the pressure sensor 21, and the capacitance changes accordingly.

This capacitance is converted into a frequency by the oscillation circuit 31, and the frequency is counted by the microcomputer 27.

The microcomputer 27 calculates (■
The relationship is memorized, and the weight is calculated from the counted frequencies. And further microcomputer 27
The optimal heating output, heating time, and heating style corresponding to the weight are stored in the memory, and based on this, the magnetron 17
A signal for controlling the output of the heater 18 and the output of the heater 18 is output to the driver 32 . The driver a2 is connected to a heater control relay 34 that controls the heater 18 and a magnetron control relay 33 that controls the magnetron 17. Further, the magnetron 17 is oscillated by a high voltage generating circuit composed of a high voltage transformer 28, a high voltage capacitor 29, and a high voltage diode 3o.

As described above, according to this embodiment, the heating output, heating time, heating pattern, etc. of the food are automatically controlled by simply placing the food in the heating chamber, and an easy-to-use heating cooker can be realized. In addition, the mounting table can be slid on the left and right rails to be taken in and out, making it easy to take food in and out.

Moreover, the mounting table 3 will not be damaged by colliding with the rear wall of the heating chamber 2, or the mounting table 3 will not be damaged by colliding with the door 37.

Furthermore, the 3g stand 3 does not come into contact with the rear wall or door 37 of the heating chamber 2, so that accurate weight detection is possible. This improves the quality of cooking.

Effects of the Invention As described above, the heat cooker with a weight detection function according to the present invention provides the following effects.

(1) Since food can be taken in and out of the heating chamber in a sliding manner, an easy-to-use cooking device can be created.

(2) The mounting table does not collide with the rear wall of the heating chamber, so damage to both can be avoided.

(31) When the door is closed, the mounting table does not collide with the door, thus preventing damage to both.

(→ Since the weight can be detected without the mounting table touching the rear wall of the heating chamber, accurate weight detection is possible.

(5) Weight can be detected without the mounting table touching the door.
Accurate weight detection is possible.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a main part of a heat cooker with a weight detection function according to an embodiment of the present invention, Fig. 2 is a front sectional view of the same, Figs. The figure is a partial sectional view of the support mechanism that supports the food load, Figure 6 is a perspective view of the main parts of the weight detection unit, Figure 7 is a sectional view showing the structure of the pressure sensor, and Figure 8 is the same. Circuit diagram of oscillation circuit,
FIG. 9 is an output waveform diagram of the oscillation circuit, FIG. 10 is a control circuit diagram, FIG. 11 is a perspective view of a conventional heating cooker, and FIG. 12 is a perspective view of the main parts. 1... Food, 2... Heating chamber, 3...
・・・Placement table, 3a... Level difference in the placing table, 4a・
...Right rail, 4b...Left rail,
4c...Rail step, 5...Connection body, 6...Parallel holding bracket, 7...Parallel holding bracket, 8... Connecting pin, 9... Fixed holding fitting, 1o... Hanging fitting, 11...
・Direction conversion fittings, 12... Load coupling fittings, 13
...Direction conversion holding bracket, 14... Weight detection unit, 15... Screw, 16...
・High frequency supply port, 17... Magnetron, 1
8... Heater, 19... Lever fitting, 2
0... Fulcrum metal fitting, 21... Pressure sensor, 22... Sensor base, 23... Pressure sensitive plate, 24... Substrate, 25 ......Spacer, 26...1EL27...Microcomputer, 28...High voltage transformer, 29.
...High voltage capacitor, 30...High voltage diode, 31...Oscillation circuit, 32...
Driver, 33... Relay for magnetron control, 34... Relay for heater control, 35...
...Display section, 36...Key operation input section, 37.
...Door, 38...Waveguide, 39...
... Rod-shaped metal fittings. Name of agent: Patent attorney Toshio Nakao and 1 other person
5 Figure (0+) 7r

Claims (4)

[Claims] (1) a heating chamber for storing food; a door located in the front of the heating chamber that can be opened and closed for taking the food in and out of the heating chamber; and a heating device for heating the food;
A mounting table on which the food is placed; a rail that receives the load of the food and the placing table and is located on both sides of the heating chamber and extends in the front-rear direction; and a rail for transmitting the load of the rail to the outside of the heating chamber. a weight detecting means for detecting the transmitted load; and a control means for controlling the output of the heating device based on the detected weight; A heat cooker with a weight detection function configured to regulate the position of the inside of the heating chamber. (2) The mounting table is provided with a step, and when the step hits the rail, the position of the mounting table is restricted so that it does not come into contact with the rear wall and door of the heating chamber. Heat cooker with weight detection function. (3) A step is provided on the rail, and when the step hits the mounting table, the position of the mounting table is restricted so that it does not come into contact with the rear wall of the heating chamber and the door. heating cooker. (4) The mounting table and the rail are each provided with a step, and when the steps come into contact with each other, the position of the mounting table is restricted so that it does not come into contact with the rear wall and door of the heating chamber. Heating cooker as described in section.