JPS58153025A - Weight sensing type food cooking utensil - Google Patents

Abstract

PURPOSE:To provide a food cooking utensil adapted to automatically set a cooking time, by constructing such that a food mounting plate is raised upward by a hydraulic unit utilizing a cooking chamber door displacement caused on its closing, a weight of food is sensed from its affect upon a working oil filled inside the hydraulic unit, and data pertaining to a food type are inputted. CONSTITUTION:When a door 19 of cooking chamber is closed, an oil tank 17 is pressed for causing a working oil filled therein to flow from an inlet port 16a into a cylinder 16 to raise upwardly a piston section 12b provided at an extreme end of rotational shaft 12a of a food mounting plate 12. Upon the door 19 being completely closed, a lever 20 is released from its engagement and the oil tank 17 is made free, but the food mounting plate 12 lowers only gradually for the reason that the working fluid would not overflow from a cylinder 16 merely through a small diameter aperture under an action of valve 18. In consequence, the food mounting plate 12 attempts to lower downwardly by its own weight together with a food mounted thereon, but needs a preset timed duration until it presses a lower limit switch 21. A control device 23 counts such a preset time duration for conversion into a weight W and controls a heating source responsive to an instructing signal sent from a start key.

Description

[Detailed description of the invention] The invention detects the total weight of the food placed within the cooking thickness, and when all types of food are input, the processing time for the food is automatically determined, and the food is processed using the processing time. related to cooking equipment.

Conventionally, cooking equipment that detects the amount of food placed in the cooking cabinet and automatically determines the total processing time for that food has supported the food table with a spring, and has been designed to detect the amount of food placed in the cooking cabinet and automatically determine the total processing time for that food. The heating time was all set by transmitting the amount of change in pressure to a timer or VIt via gears, etc.

According to this conventional device, the spring that displaces depending on the weight of the food is easily affected by heat in the cooking chamber, and its spring constant etc. may change, and if used for a long time, the heating time may be inconsistent. There is a risk that you will not be able to achieve the optimum tone. In addition, this conventional device has the disadvantage that it can only be applied to cooking devices with a non-rotating food table, and cannot be applied to cooking devices with a rotating food table such as a turntable such as today's microwave ovens. have.

The present invention has been made in view of the above, and is a rotating food table that is not easily affected by the heat inside the cooking cabinet.
To provide a cooking device that can automatically set cooking time by detecting the total weight of food and inputting all types of food.

A feature of the present invention is that the food table is lifted by a hydraulic device using the displacement of the cooking cabinet door when it is closed, and the weight of the food is detected from the effect that the weight of the food has on the hydraulic oil in the hydraulic device. The feature is that once you input information about the type of food, the cooking time is automatically set.

Embodiments of the present invention will be fully explained below based on the drawings.

FIG. 1 is a front external view of an embodiment of the present invention.

On the operation spring /L/1, a display device 2 for displaying the entire automatically set cooking time, a key input device 6 for inputting the type of food, etc., and a start key 4 are arranged.

FIG. 2 is an explanatory diagram showing the configuration of an embodiment of the present invention.

1. The food table 12 in the cooking cabinet is a rotary so-called △ turntable, and has a rotating shaft 12a'e, and a pulley 16 is disposed on the rotating shaft 12a, and the rotating shaft 12a is rotated by a motor 14. The rotation axis f2a of this food table 12 is supported by a nullide bearing 15 provided in the cooking chamber 11 so as to be able to slide in the vertical direction VC, and its terminal end is connected to the cylinder 1.
A flexible rubber oil tank 17 filled with hydraulic oil is connected to the hydraulic oil supply port 16a of the cylinder 16. A valve 18 that only allows oil to flow from the oil tank 17 to the cylinder 16 is provided in the hydraulic oil supply port 16B.A minute hole is bored in this valve 18 to allow the oil to flow as described above. from the cylinder 16 in the opposite direction to the oil tank 1.
Oil is allowed to flow into 7 only through this minute hole.

One end of a lever 20 is disposed on the door 19 of the cooking cabinet 11,
The other end engages with the oil tank 17 via, for example, a slider crank mechanism, and is configured to press the oil tank 17 in the direction of the arrow in the figure in response to the fully closing operation of the door 19, and when the door 19 is completely closed. For example, a ratchet-pawl mechanism is provided to release the locking relationship. Therefore, when the door 19 is closed, the oil tank 17 is completely suppressed as described above, and the hydraulic oil in the oil tank 17 flows into the cylinder 16 from the supply port 16a, and the piston part 12b' at the end of the rotating shaft 12a of the food table 12 When the door 19 is completely closed, the lever 20 is released and the oil tank 17 is free, but due to the action of the valve 18, the hydraulic oil flows out from the cylinder 16 only through the small hole. Therefore, the food mounting table 12 is configured to descend gently.

The rotating shaft 12a of the food table 12 also has a contact member 12.
A lower limit switch 21 is provided at a position corresponding to the lowest end of the vertical movement, and an upper limit switch 22 is provided at a position corresponding to the lowest end of the casing. When the food placing table 12 is at the lowest end, the food placing table 12 rides on rollers 25 provided in the cooking chamber 11, and serves as a support guide for rotation by the motor 14. Further, the engagement relationship between the rotating shaft 12a of the food mounting table 12 and the pulley 13 is configured such that, for example, a spline groove is formed so as to correspond to the vertical movement of the rotating shaft 12a, and the pulley 13 engages only in rotation.

The lower limit switch 21 and the upper limit switch 22 are connected to a control device 26, and a door switch 24 that detects all open and closed states of the door is also connected to the control device 26. The control device 26 is composed of a microprocessor,
In addition to the CPU, there are ROM and RAM that store programs, etc., and a clock generator CLO that generates predetermined clock pulses.
It has a CK-2 and is also connected to a key manual device 6 and a display device 2.

Next, I will explain how it works. When the door 19 of the cooking cabinet 11 is fully opened, the processed food is placed on the food table 12, and the door 19 is closed.
Due to the displacement of the door 19, the lever 20 presses the oil tank 17 via a slider crank mechanism, etc., and the hydraulic oil in the oil tank 17 flows into the cylinder 16 from the hydraulic oil supply port 16&, causing the food table 12 to rotate. The piston portion 12b formed at the shaft 12 & end is pushed up completely. door 19
When the door is completely closed, the contact member 12e formed on the rotating shaft 12a of the food table 12 fully suppresses the upper limit switch 22 and supplies a signal to the control device 26, and the door switch 24 also outputs a signal to the control device. Fully supply the closing signal to fEt23. In addition, the oil tank 17 is released from the lever 20 by a ratchet-claw mechanism provided on the lever 20, and the food platform 12 is lowered by its own weight along with the processed food placed thereon. However, since the hydraulic oil can only be returned to the oil tank 17 through the small hole made in the valve 18, it takes a predetermined time to completely lower the lower limit switch 21f. The time required is a +11 relationship that is uniquely related to the force exerted by the hydraulic oil in the cylinder 16, that is, the sum of the weight WO of the food table 12, the weight Wl of the container containing the processed food, and the weight W2 of the processed food. have. A means for detecting the above-mentioned weight sum using the time required for getting off the F will be explained according to the explanatory diagram in FIG. Built-in clock generator CL
A clock pulse of a predetermined period is generated from OCK, and the food table 12 is lowered to a certain extent and the upper limit switch 22 is activated.
Counting of clock pulses is started from the time when the switch 21 is pressed away from the part 12C of this part A, and counting of clock pulses is stopped when the lower limit switch 1-switch 21 is pressed. This count value is converted into weight W using the above-mentioned unique correlation. This converted weight W is the weight Wo of the food mounting table 12 and the weight W1 of the food container.
and the weight W2 of the processed food, and a method for extracting only the weight W2 of the processed food from this weight sum W will be described below.

Processed food placed on the food placement table 12 may be placed directly, placed in a standard container prepared in advance depending on the food content, or placed in an arbitrary cooking container other than the standard container. There are three possible ways in which it may be placed. Therefore, predetermined human power is supplied to these three forms using the key human power device 6 before the weight measurement operation. That is, in cases other than the case where the device is placed in the reference container, the corresponding inputs are supplied by the key operator device B. If there is no above-mentioned input from the key human power device, the control device 26 determines that the food to be processed is placed in the reference container, and from the sum of the weights, the known food mounting table 12 weight WO and the known reference volume i weight W1 The processed food weight W2 is determined by subtracting the amount. When the processed food is directly placed, when a signal to that effect is input, the control device 26 subtracts only the known food mounting table weight WO from the weight sum W to obtain the processed food weight W2. If the processed food is to be placed in an arbitrary container other than the standard, input a signal to that effect, and first place only the container without the processed food in it, and record its weight Wl.
' is calculated from the weight sum W and the food table weight WO, and is stored.
Next, put the food to be processed into the container, calculate the weight sum W, and from the weight sum W, the food mounting table weight WO and the tube weight Wl
' is subtracted to find the processed food type MW2.

The control device 23 calculates the cooking time of the food using the processed food weight W2 determined in this way and a preset coefficient sound corresponding to the food content that is input separately from the key human power device 6. , all heating sources are controlled based on the signal from the start key 4.

The overlapping detection means used in the two series of embodiments of the present invention adopted a method of converting the pressure received by the hydraulic oil in the cylinder and the flow rate from the orifice into weight. As shown in a cross-sectional view of a main part of another embodiment, a piezoelectric or pressure-sensitive rubber pressure-sensitive element 62 may be provided in a cylinder 61, and the change in voltage or resistance thereof may be converted into k weight.

As explained above, according to the present invention, since the weight of the food is detected by 1° outside the cooking chamber, the cooking time can always be accurately calculated without being affected by thermal effects, and the device is highly reliable. By obtaining this, it is now possible to use a food table that rotates by one rotation or a food table that does not rotate.

[Brief explanation of drawings]

FIG. 1 is a front external view of an embodiment of the present invention, FIG. 2 is a configuration diagram of an embodiment of the present invention, FIG. 3 is an explanatory diagram of the operation related to clock pulse counting, and 4th Ii, + 1tI of the present invention = This is a cross section 1'AI of the main part of the embodiment. 6...--Key human power device 12... Food mounting table 16... Cylinder 17... Oil tank 18... Valve 26... ...Control device patent applicant Sharp Co., Ltd. agent Patent attorney Nishi 1) Arata (11) -~

Claims (1)

[Claims] A food table that can freely slide vertically in the cooking chamber, a hydraulic device that uses the displacement of the food table when the door of the kitchen is closed to push the food table upward, and a receiver for the hydraulic oil of the hydraulic device. A food weight detecting means for detecting the total weight of the food on the food table based on a difference in pressure, an input device for selecting the type of food, and all information from the food detecting means and the input device are introduced to detect the food. It is equipped with a control device that calculates the cooking time and controls the heating source, and when the food to be processed is placed on the food table, the door of the cooking chamber is closed, and the type of food to be processed is entered, the process is automatically performed. A food weight sensing type cooking device configured to automatically set the heating time.