JPS61119921A - Cooker equipped with weight sensor - Google Patents

Abstract

PURPOSE:To enable to also use as a common balance independently of the execution of cooking by a structure wherein a means for informing the result of the detection of the weight of an object housed in a heating chamber by means of the output of a weight sensor, a means to detect the opening and closing of the opening door of the heating chamber and a means to execute cooking in response to the detected result of the weight only under the condition that he closing of the door is detected are provided. CONSTITUTION:When foodstuff is placed on a tray plate 6 under the condition that the door of a heating chamber 1 is open, pressure is applied on the top surface of a weight sensor 9 through a connecting rod 8 with the lowering of a tray plate stand 5. Further, when a cooking key 24 is turned ON, a microcomputer 20 responds to the turning-ON of the key so as to put a relay 10 into actuation in order to close a contact 10a, resulting in putting the weight sensor 9 into actuation so as to output a signal with the level corresponding to the weight of the foodstuff. The output signal is processed at a sensor controlling circuit 11 so as to be supplied in order to obtain the weight of the foodstuff and to displayed in a displaying part 25. Because a door switch 23 is in OFF state, the computer does not perform the setting of a cooking program based upon the obtained weight.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a cooking appliance with a weight sensor that is equipped with a weight sensor that detects the weight of food.

(Technical background of the invention and its problems) In general, in this type of cooking device, such as a microwave oven, when food is placed in a heating chamber, the weight of the food is detected by a weight sensor, and the weight of the food is detected by a weight sensor. A cooking program is set according to the set cooking program, and cooking is executed based on the set cooking program.

By the way, in such microwave ovens, the weight sensor is used to detect the weight only of the food that is about to be cooked, making it impossible to frequently measure the amounts of various ingredients listed in the cookbook, for example. Therefore, it was sometimes inconvenient that a scale had to be prepared separately. In other words, the actual situation was that the weight detection means was not utilized to its full potential.

[Purpose of the invention]

This invention was made in view of the above circumstances,
The purpose is to provide a cooking appliance with a weight sensor that can be used as a general scale regardless of the cooking process.

[Summary of the invention]

The present invention relates to a heating chamber, a high-frequency generator that supplies high-frequency waves into the heating chamber, a weight sensor to which the weight of an object stored in the heating chamber is applied, a means for operating the weight sensor in response to a cooking start operation, and a means for operating the weight sensor in response to a cooking start operation. A weight detection means for detecting the weight of an object stored in the heating chamber based on the output of a sensor, and a notification means for notifying the detection result of the weight detection means, and detecting opening and closing of a door at an opening in the heating chamber. and a means for executing cooking according to the detection result of the weight detection means in response to a cooking start operation only when the means detects the closing of the door, and the scale functions as a scale when the door is opened. It is possible to use it.

[Embodiments of the invention]

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

In FIG. 2, reference numeral 1 denotes a heating chamber, and a magnetron 2, which is a high frequency generator, is provided on the outer periphery of the side wall of the heating chamber 1. And antenna 2 of magnetron 2
a is introduced into the heating chamber 1. Further, a light transmission hole 3 is formed in the side wall of the heating chamber 1, and an interior lamp 4 for heating blank illumination is provided outside the light transmission hole 3. Further, a shelf board 5 is provided at the bottom of the heating chamber 1, and a shelf board 6 for placing food is removably set on the shelf board 5. The shelf board 5 has a shaft 5a in its lower part, and this shaft 5a passes through the bottom surface of the heating chamber 1 and is connected to the rotating shaft of the rotary shelf drive motor 7. Note that the shaft 5a is movable up and down with respect to the rotating shaft of the rotary shelf drive motor 7 by an internal spring.

Thus, the middle part of the shaft 5a of the shelf board 5 is formed into a step, and one end of the connecting rod 8 is in contact with this step. The other end of the connecting rod 8 is bent downward and comes into contact with the upper surface of a weight sensor (for example, a load cell) 9. In other words, the shelf base 5
The weight applied to the weight sensor 9 is applied to the upper surface of the weight sensor 9 via the connecting rod 8. The weight sensor 9 operates when an operating voltage Vd is applied through the relay contact 10a, and outputs a signal at a level corresponding to the pressure applied to the upper surface. The output of the weight sensor 9 is subjected to signal processing (amplification, etc.) by a sensor control circuit 11, and is supplied to a microcomputer 20, which is a main control section.

The microcomputer 20 is connected to a commercial AC power source 22 via a power transformer 21, and the door switch 2
State 3, operation of cooking key 24.

Based on the output signal of the sensor control circuit 11, etc.
Drive control of relay 10, display section 2
5, and on/off control of the triac 26.

Here, the door switch 23 is turned on when a door (not shown) at the opening of the heating chamber 1 is closed, and turned off when it is opened. However, the above triac 26
and a high voltage transformer 27.

Now, the door of the heating v1 is opened and food is placed on the shelf board 6. When food is placed, the shelf board 5 is lowered by the weight of the food, and pressure is applied to the upper surface of the weight sensor 9 by the connecting rod 8. Then, close the door and turn on the cooking key 24 (
When the cooking start operation is performed, the microcomputer 20 first operates the relay 10 in response to the cooking start operation. relay 1
0 operates, the weight sensor 9 operates by closing the contact 10a, and the weight sensor 9 outputs a signal at a level corresponding to the weight of the food. This output signal is processed by the sensor control circuit 11, and the microcomputer 2
0. The microcomputer 20 calculates the weight of the food by calculating the output signal of the sensor control circuit 11, and adjusts the cooking time, food temperature, and food temperature according to the calculated weight.
Set cooking programs such as heating output. Then, the obtained weight and the content of the set cooking program (for example, cooking time) are displayed on the display unit 25. When the weight detection, cooking program setting, and display are completed, the microcomputer 20 displays the set cooking program. On/off control of the triac 26 is started based on the program, and cooking is executed.

On the other hand, food is placed on the shelf board 6 with the door of the heating chamber 1 open. When food is placed, the shelf board 5 descends due to the weight of the food, and pressure is applied to the upper surface of the weight sensor 9 by the connecting rod 8. When the cooking key 24 is turned on (iJ cooking start operation), the microcomputer 20 first operates the relay 10 in response. When the relay 10 operates, the contact 10a closes to operate the weight sensor 9, and the weight sensor 9 outputs a signal at a level corresponding to the weight of the food. This output signal is the sensor control circuit 1
1, the signal is processed and supplied to the microcomputer 20. The microcomputer 20 calculates the weight of the food by calculating the output signal of the sensor control circuit 11, and displays the calculated weight on the display section 25. in this case,
Since the door switch 23 is in the OFF state, that is, the door remains open, the microcomputer 20 does not set a cooking program based on the determined weight and does not execute cooking. That is, only the detected Ili is displayed when the door of the heating chamber 1 is open.

Therefore, by leaving the door of the heating chamber 1 open, it can be used as a general scale to measure not only the weight of the food you are about to cook, but also the quantities of various ingredients listed in a cooking book. etc. can be easily and quickly measured without preparing a separate scale. Moreover, it is possible to detect the weight of any object, not just food, as long as it can fit inside the heating chamber 1. In other words, the weight detection function can be fully utilized. Also, when cooking when the door is closed,
Since weight detection and cooking program settings have already been completed, proper cooking can be performed without being affected by noise.

In the above embodiment, the detected weight is displayed on the display unit, but the detected weight may be announced by voice using, for example, a sound generating device. In addition, the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without changing the gist.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a cooking appliance with a weight sensor that can also be used as a general scale regardless of the execution of cooking.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, and FIG. 1 is a flowchart for explaining the operation, and FIG. 2 is a schematic diagram of the internal mechanism and control circuit. DESCRIPTION OF SYMBOLS 1... Heating chamber, 2... Magnetron (high frequency generator), 9... Weight sensor, 11... Control circuit for sensor, 20... Microcomputer (main control part), 2
3...Door switch, 25...Display section (notification means)
.

Claims (2)

[Claims] (1) A heating chamber, a high-frequency generator that supplies high-frequency waves into the heating chamber, a weight sensor to which the weight of an object placed in the heating chamber is applied, and means for activating the weight sensor in response to a cooking start operation. , weight detection means for detecting the weight of an object housed in the heating chamber based on the output of the weight sensor; notification means for notifying the detection result of the weight detection means; and control means for opening and closing a door at an opening in the heating chamber. and means for executing cooking in response to a cooking start operation in accordance with the detection result of the weight detecting means only when the means detects the closing of the door, and when the door is opened. , a cooking device with a weight sensor that is characterized by its use as a scale. (2) The cooking appliance with a weight sensor according to claim 1, wherein the notification means displays the detection result of the weight detection means.