JPH08150069A - Jar rice cooker - Google Patents

Abstract

PURPOSE: To provide a jar rice cooker equipped with a room temperature sensor capable of measuring a room temperature more accurately. CONSTITUTION: This cooker is equipped with an inner pot 6 in which rice and water are put, a heating means 7 which heats the inner pot 6, a pan temperature sensor 8 which detects the temperature of the inner pot 6, and a control board 9 on which a microcomputer to control the heating means 7 setting the output of the pan temperature sensor 8 as input is loaded. An accurate room temperature hard to receive the influence of the heat of the heating means 7 can be detected by loading a temperature sensor 10 such as a thermistor, etc., and providing a temperature sensor board 11 connected to the control board 9 with a lead wire 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jar rice cooker mainly used at home.

[0002]

2. Description of the Related Art In recent years, a jar rice cooker has been developed which is equipped with a microcomputer, measures the room temperature with a temperature sensor, and changes the heating control depending on the room temperature to improve the heat retention performance or the rice cooking performance.

The structure of a conventional jar rice cooker will be described below. As shown in Figure 3, an inner pot 1 containing rice and water
Are placed on the heater 2 and heated. The pot temperature sensor 3 detects the temperature of the inner pot 1 and sends a signal to the control board 4. The control board 4 is equipped with a microcomputer and can control the heating of the heater 2 based on the signal from the pan temperature sensor 3. A room temperature sensor 5 which is a thermistor is mounted on the control board 4 so that the room temperature can be measured.

The operation of the jar rice cooker configured as described above will be described below. When rice and water are put in the inner pot 1 to cook rice, the pot temperature sensor 3 detects the temperature of the inner pot 1 and sends a signal to the control board 4, and the control board 4 controls heating by the heater 2. At this time, the room temperature sensor 5 measures the room temperature, and the heating control can be adjusted depending on the room temperature. Optimum rice cooking can be performed by controlling the heating of the heater 2. Even when the rice is kept warm after the completion of rice cooking, the optimal heating control can be similarly performed.

[0005]

However, in the above-described conventional configuration, the control board 4 has a large number of electronic components mounted thereon, which limits the miniaturization of the electronic device, and thus the limited space inside the rice cooker body. However, the room temperature sensor 5 is affected by the heat of the heater 2 and it is difficult to measure the accurate room temperature.

[0006] The present invention is to solve the above problems, and a first object thereof is to provide a jar rice cooker capable of measuring the room temperature more accurately.

A second object of the present invention is to provide a jar rice cooker for performing more accurate room temperature measurement without increasing the number of parts.

[0008]

In order to achieve the first object, a jar rice cooker of the present invention comprises an inner pot for containing rice and water, heating means for heating the inner pot, and the inner pot. It is equipped with a pan temperature sensor that detects the temperature of the pan and a control board that mounts a microcomputer that controls the heating means by using the output of the pan temperature sensor as an input. A temperature sensor substrate connected by wires is provided.

Further, in order to achieve the second object, the jar rice cooker of the present invention comprises a battery for driving a microcomputer provided on a control board and a battery board on which the battery is mounted. The temperature sensor is provided on the substrate.

[0010]

With this structure, by providing the temperature sensor substrate on which the temperature sensor is mounted, it is possible to measure the room temperature accurately without being easily affected by the heat of the heating means.

Further, by providing the temperature sensor on the battery substrate, it is possible to accurately measure the room temperature and to increase the number of parts.

[0012]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIG. In the figure, an inner pot 6 for putting rice and water is a heating means 7 including a heating plate or a heating coil.
It is placed on and heated. Pan temperature sensor 8 is inner pan 6
The temperature is detected and a signal is sent to the control board 9. The control board 9 is equipped with a microcomputer and controls heating of the heating means 7. A room temperature sensor substrate 11 having a room temperature sensor 10 which is a temperature sensor such as a thermistor is attached to an outer lower portion of the rice cooker body 20 and covered with a room temperature sensor cover 12. The room temperature sensor board 11 and the control board 9 are connected by the lead wire 13, and the control board 9 can receive the signal of the room temperature sensor 10 and determine the temperature. The top of the rice cooker body 20 is covered with a lid 21.

The operation of the above configuration will be described. When rice and water are put into the inner pot 6 to cook rice, the pot temperature sensor 8
Detects the temperature of the inner pot 6 and sends a signal to the control board 9, and the control board 9 controls the heating by the heating means 7. Further, the room temperature sensor 10 detects the room temperature and sends a signal to the control board 9 to adjust the heating control of the heating means 7 according to the room temperature. Optimal rice cooking can be performed by controlling the heating of the heating means 7. When the rice is kept warm after the rice is cooked, the same heating control as above is performed. Since the room temperature sensor substrate 11 has only a temperature sensor and is small in size, it can be easily attached to the outer lower portion of the rice cooker main body 20 and can detect the room temperature without being affected by the heat of the heating means 7.

As described above, according to the jar rice cooker of the embodiment of the present invention, since the room temperature sensor 10 is provided on the small room temperature sensor substrate 11, the room temperature sensor 10 is placed in a place where the heating means 7 is less likely to be affected. It can be provided and the accurate room temperature can be detected.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings. In the figure, the basic configuration is the same as that of the first embodiment, the battery board 14 is an existing one, and is connected to the control board 15 by the lead wires 16,
A battery 17, which is a backup power source for the microcomputer mounted on the control board 15, is mounted. The battery 17 has a life of about 5 years, and is attached to the lower outside of the rice cooker body 20 because it needs to be replaced, and is covered by the battery cover 18. A room temperature sensor 19 is mounted on the battery board 14.

The operation of the above configuration will be described. The operation is similar to that of the first embodiment, and the room temperature sensor 19 detects the room temperature and sends a signal to the control board 15 to adjust the heating control according to the room temperature. The battery board 14 is small in size because it needs to be replaced, and is attached to the lower outer portion of the rice cooker body 20, and can detect the room temperature without being affected by the heat of the heating means 7.

As described above, according to the jar rice cooker of the embodiment of the present invention, the battery substrate 1 in which the room temperature sensor 19 needs to be replaced.
4 is installed in the lower part of the outer side of the rice cooker body 20 which is not easily affected by the heating means 7, and can detect the accurate room temperature, and the existing battery board 14 is provided with the room temperature sensor 19. Therefore, it is not necessary to newly provide a substrate for the room temperature sensor.

[0018]

As described above, according to the present invention, since the room temperature sensor is provided on the small-sized room temperature sensor substrate, the room temperature sensor can be provided in a place that is not easily affected by the heating means, and the accurate room temperature can be detected. be able to. In other words, this accurate room temperature detection enables finer heating control, and more delicious rice can be provided.

Further, according to the present invention, since the room temperature sensor is mounted on the battery substrate which needs to be replaced, the room temperature sensor is provided on the lower outside of the rice cooker body, which is less likely to be affected by the heating means, and can accurately detect the room temperature. Since the room temperature sensor is provided on the existing battery board, there is no need to newly provide a room temperature sensor board, and the jar rice cooker having a simple structure that does not increase the number of parts is provided.

[Brief description of drawings]

FIG. 1 is a sectional view of a jar rice cooker showing an embodiment of the present invention.

FIG. 2 is a sectional view of a jar rice cooker showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view of a conventional jar rice cooker.

[Explanation of symbols]

 6 Inner pan 7 Heating means 8 Pan temperature sensor 9, 15 Control board 10, 19 Room temperature sensor 11 Room temperature sensor board 13, 16 Lead wire 14 Battery board 17 Battery

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Atsushi Tanaka 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Toshio Arai, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Atsushi Koma 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Toshiyuki Nakamura Osaka 1006 Kadoma, Kadoma Matsushita Electric Industrial Co., Ltd. (72) Inventor Norio Ikeda Osaka 1006 Kadoma, Kadoma-shi, Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. An inner pot for containing rice and water, a heating means for heating the inner pot, a pot temperature sensor for detecting the temperature of the inner pot, and the heating means using the output of the pot temperature sensor as an input. A jar rice cooker comprising a control board equipped with a microcomputer for controlling a temperature sensor, a temperature sensor such as a thermistor, and a temperature sensor board connected to the control board by a lead wire. 2. An inner pot for containing rice and water, a heating means for heating the inner pot, a pot temperature sensor for detecting the temperature of the inner pot, and the heating means with the output of the pot temperature sensor as an input. A jar rice cooker comprising a control board having a microcomputer for controlling the battery, a battery for the microcomputer of the control board, and a battery board on which the battery is mounted, and a temperature sensor provided on the battery board.