JPS63197822A - Cooking apparatus - Google Patents

Abstract

PURPOSE:To improve the convenience for use of the apparatus by supplying power to a heating chamber illuminating lamp in accordance with the detection result of door opening and closing detection means and the output of a weight sensor, in an microwave over. CONSTITUTION:The operating and closing of a door are detected by ON or OFF of door opening or closing detecting means and the output of a weight sensor, are inputting to a control part 20. Further, the weight of a food is detected by a weight sensor 4 and is inputted to the control part 20. If the door is opened, a lamp 9 is lit regardless of existence or nonexistence of the weight detection by a weight sensor 4. Furthermore, even if the door is closed, when the weight sensor 4 is detecting the weight of a food, the lamp 9 is lit. That is, in these states, the control part 20 actuates a relay 22 to form a circuit for power supply to the lamp 9. By this constitution, the convenience for use of the apparatus can be improved.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a cooking appliance such as a microwave oven.

(Prior Art) A cooking appliance, such as a microwave oven, is provided with a door that can be opened and closed on the front surface of the main body, and a heating chamber is disposed within the main body corresponding to the door. A lamp for illuminating the heating room, a so-called interior light, is provided, and the lighting of the interior light is controlled according to the opening/closing of the door, the execution state of cooking, and the like.

By the way, there are various types of lighting control for the interior lights. For example, as shown in Figure 5 (a), there is one that turns on only when cooking is being performed, and one that turns on only when cooking is started, as shown in Figure 5 (1)). There are devices that turn on the lights when storing food, when cooking, and when taking out food after cooking.

(Problems to be Solved by the Invention) However, in the former case, when the kitchen is turned on only when cooking is being performed, it becomes inconvenient when storing and taking out food when the kitchen is dark. On the other hand, in the latter case, there is an inconvenience that the state of the food in the heating chamber cannot be checked from the time the food is stored until the start of cooking, or roughly from the end of cooking until the food is taken out.

This invention was made in view of the above circumstances,
The purpose is to provide a highly reliable and easy-to-use cooker that allows food to be stored and taken out easily even in darkness, and allows the user to constantly check the condition of the food. There is a particular thing.

[Configuration of the Invention (Means for Solving Problems) A heating chamber, a lamp for illuminating the inside of the heating chamber, an opening/closing detection means for detecting opening/closing of the heating door, and a heating chamber housed in the heating chamber. A 1ffi sensor for detecting the weight of the food being served, and a control means for controlling energization of the lamp according to the output of the weight sensor and the detection result of the opening/closing detection means are provided.

(Function) When storing food before starting cooking, from storing food until starting cooking, from finishing cooking until taking food out, and when taking food out after cooking, the lamp lights up and the inside of the heating chamber is lit. illuminated.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a heating chamber, which is equipped with a door 1a at its opening so as to be openable and closable, and a rotary plate 2 at its bottom. The rotary plate 2 has a shaft 2a extending from a central portion of the lower surface thereof, and the shaft 2a passes through the bottom surface of the heating chamber so as to be vertically movable and is connected to the motor 3 and the weight sensor 4. The motor 3 provides rotational force to the shaft 2a. The weight sensor 4 receives the main shock applied to the shaft 2a and outputs an electric signal corresponding to the weight.

Thus, a rotating plate 5 for mounting food images is removably placed on the rotating plate 2. 6 is food.

Further, a magnetron 7 is provided on the back side of the ceiling surface of the heating chamber 1, and an antenna 7a of the magnetron 7 is introduced into the heating chamber 1. Further, a light irradiation port 8 is formed in the upper part of the side wall of the heating chamber 1, and a lamp 9 for illuminating the heating room is disposed outside the light irradiation port 8.

FIG. 1 shows the control circuit.

10 is a commercial text 81 power supply, and fuse 11 is connected to this power supply 10.
The lamp 9 is connected via the relay contact 22a in series. Furthermore, a door interlock switch 12 . Door monitor switch 14. A series circuit of door interlock switch 13 is connected. Here, the door interlock switch 12.
Reference numeral 13 turns on when the door 1a is closed and turns off when the door 1a is opened. The door monitor switch 14 is connected to the door 1a.
It turns off when the door is closed and turns on when it opens.

In addition, for the power supply 10, a fuse 11, a door interlock switch 12, a relay contact 24a1, a relay contact 23a
, and the primary coil 15a of the high voltage transformer 15 are connected through the door interlock switch 13 in series. The anode and cathode of the magnetron 7 are connected to the secondary coil 15b of the high voltage transformer 15 via a half-wave voltage doubler rectifier circuit comprising a high voltage capacitor 16 and a high voltage diode 17. The anode of the magnetron 1 is grounded, and the heater (cathode) is connected to the high voltage transformer 15.
is connected to the secondary coil 15c.

Further, a magnetron cooling fan motor 18 and the motor 3 are connected to 1t) In2O through a fuse 11, a door interlock switch 12, a relay contact 23a, and a door interlock switch 13 in series.

Thus, the control section 20 is connected to the power source 10 via the fuse 2. This control section 20 performs overall control of the microwave oven, and is composed of a microcomputer and its peripheral circuits, and further includes an opening/closing detection circuit 21. The open/close detection circuit 21 connects to the power supply 10 via the fuse 11 and door interlock switches 12 and 13.
is connected to the door interlock switch 12.1
The opening/closing of the door 1a is detected depending on whether the door 1a is turned on or off.

The relays 22, 23, 24, the operating section 25, and the weight sensor 4 are connected to the control section 20.

Next, the operation of the above configuration will be explained with reference to FIG.

The control unit 10 performs control as shown in the table below based on the opening/closing of the door 1a and the output of the weight sensor 4.

Here, "present" indicates that the weight of the food or container has been detected, and "absent" indicates that the weight of the food or container has not been detected.

That is, when the power source 10 is turned on and the door 1a is opened to place the food 6 in the heating chamber 1, the opening/closing detection circuit 2
1 is detected. The control unit 10 energizes the relay 22 by detecting the opening of the door 1a, thereby forming an energizing path to the lamp 9. That is, the lamp 9 is turned on and the inside of the heating chamber 1 is illuminated.

When the food 6 is placed on the rotating plate 5 in the heating chamber 1a, the l
ff1 is detected by the weight sensor 4. In this case, door 1
a is open and the weight sensor 4 is detecting the weight of the food 6 (or container), so the control unit 10 connects the relay 22
In other words, the lamp 9 continues to be energized.

When the storage of the food 6 is completed in this way, the door 1a is closed, and the operation section 25 is used to start cooking. Then, the control unit 20 uses the opening/closing detection circuit 21 to detect the door 1a.
22 and 23 are energized. In other words, the magnetron 7 operates to oscillate, and cooking begins.

At this time, the door 1a is closed, but since the weight sensor 4 has detected the weight of the food 6, the control unit 10
2 (lighting of lamp 9) continues.

On the other hand, the control unit 10 sets the cooking time according to the weight detected by the weight sensor 4, and deenergizes the relays 23 and 24 when the set cooking time has elapsed. In other words, the oscillation operation of the magnetron 7 stops, and cooking ends. At this time, since the weight sensor 4 is still detecting the weight of the food 6, the control unit 10 continues to energize the relay 22 (turn on the lamp 9).

When the user knows that cooking is finished, he opens the door 1a and takes out the food 6 from the heating chamber 1. At this time, the weight sensor 4 no longer detects the weight of the food 6, but since the door 1a is open, the control unit 10 continues energizing the relay 22 (lighting the lamp 9).

When the removal of the food 6 is completed, the user closes the door 1a. At this time, since the weight sensor 4 does not detect the weight of the food 6 and the door 1a is closed, the control unit 10
deenergizes the relay 22 and cuts off the power to the lamp 9.

In other words, the lamp 9 is turned off.

As a result, the lamp 9 is lit continuously from the time the food is stored before the start of cooking until the time the food is taken out after the end of cooking.

In this way, the lamp 9 is lit and the inside of the heating chamber 1 is illuminated when storing the food before starting cooking and when taking out the food after the cooking is finished, so the food 6 can be easily stored even in a dark kitchen. and can be taken out, making it easy to use.

Furthermore, the lamp 9 is lit and the inside of the heating chamber 1 is illuminated not only during cooking, but also from the time the food 6 is stored until the start of cooking, and from the end of cooking until the time the food 6 is taken out. , the user can always check the condition of the food 6, resulting in excellent reliability. Moreover, since a microwave oven having an automatic cooking function is often equipped with a weight sensor 4, there is no cost problem associated with this.

In the above embodiment, the lamp 9 is lit continuously, but as shown in FIG. 4, even if the weight sensor 4 detects the weight of the food 6, the door 1a is If the cooking start operation is not performed within a certain time tI from
The lamp 9 may be turned off. Furthermore, lff
Even if the 1 sensor 4 detects the weight of the food 6, the lamp 9 may be turned off if the door 1a is not opened within a certain time t2 from the end of cooking. This is to prevent wasteful consumption of power, and optimally both tl and t2 are about 30 seconds.

In addition, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without changing the gist.

[Effects of the Invention] As described above, according to the present invention, a heating chamber, a lamp for illuminating the inside of the heating chamber, an opening/closing detection means for detecting opening/closing of the door of the heating chamber, and a lamp installed in the heating chamber. A weight sensor for detecting the weight of stored food and a control means for controlling energization of the lamp according to the output of the weight sensor and the detection result of the opening/closing detection means are provided.
To provide a cooker with excellent usability and reliability, which allows food to be easily stored and taken out even when the surroundings are dark, and further allows a user to always check the condition of the food.

[Brief explanation of the drawing]

Fig. 1 shows the configuration of a control circuit in one embodiment of the present invention, Fig. 2 shows the structure of the heating chamber and its surroundings in the same embodiment, and Fig. 3 explains the operation of the embodiment. FIG. 4 is a time chart for explaining a modification of the same embodiment, and FIG. 5 is a time chart for explaining the operation of a conventional microwave oven. DESCRIPTION OF SYMBOLS 1... Heating chamber, 1a... Door, 4... Weight sensor, 6... Food, 7... Magnetron, 9... Lamp, 20... Control part, 21... Opening/closing Detection circuit. Applicant's agent Patent attorney Takehiko Suzue No. 2 Diagram No. 4

Claims (4)

[Claims] (1) a heating chamber, a lamp for illuminating the inside of the heating chamber, an opening/closing detection means for detecting opening/closing of a door of the heating chamber, and a weight sensor for detecting the weight of food stored in the heating chamber; A cooking appliance characterized by comprising: a control means for controlling energization of the lamp according to the output of the weight sensor and the detection result of the opening/closing detection means. (2) The control means forms an energizing path to the lamp when the weight sensor detects the weight of the food or the opening/closing detection means detects the opening of the door. The cooker according to scope 1. (3) A patent characterized in that the control means cuts off electricity to the lamp even if the weight sensor detects the weight of the food, if no cooking start operation is performed within a predetermined time after the door is closed. A cooking device according to claim 2. (4) The control means cuts off electricity to the lamp if the door is not opened within a predetermined time from the end of cooking even if the weight sensor detects the weight of the food. Cooking device according to scope 3.