JPH105129A - Thin rice gruel boiling-up detector for cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the boiling-up of thin rice gruel despite of a simple method and use it as a control signal by constituting a detector in such a manner as emitting a boiling-up signal in detecting the lowering of a detection temperature after continuing a fixed temperature for fixed hours in a state heated to the boiling temperature. SOLUTION: When a rice cooker is operated to cook rice, a gas burner B is ignited and the rice cooling operation is executed while controlled the heating power. The temperature in the cooking pot 10 is raised so as to reach the boiling temperature (100 deg.C) and a temperature sensor S detects the boiling point. When the rice cooking is proceeded, the thin rice gruel is started to be produced in the cooking pot 10. The thin rice gruel is boiled up as bubbles, fills the bottom of the inner lid 21, and then reaches steam escape holes 211, 211 provided in the center of the inner lid 21. After that, when the bubbles of the thin rice gruel touch the temperature sensor S, the detection temperature is reduced temporarily. The thin rice gruel boiling signal is thus emitted from an output means by lowering of the detection temperature and so it is detected that the inside of the cooking pot 10 is in the boiling state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for detecting the rising of a tongue of a cooking device, that is, a device for detecting a point at which a tongue generated during cooking reaches a lid as bubbles. .

[0002]

2. Description of the Related Art There have been proposed various types of gas cookers in which rice is cooked by gas-fired power and kept warm by an electric heating device. In the case of gas-fired rice cooking, the time required for rice cooking can be set short because the heating power during rice cooking can be set large. On the other hand, in this type of rice cooker, in order to improve the efficiency at the time of keeping the temperature, it is important to reduce the amount of steam vents provided in the inner lid and the upper lid that close the upper opening of the rice cooker. However, when the steaming power is increased by reducing the opening area of the steam vent, spills occur during cooking.

[0003] Under such circumstances, it is possible to capture the precursory phenomenon of the spill, and if the precursory phenomenon is captured (detected), perform the special control thereafter to prevent the spill. Occurs.

[0004]

DISCLOSURE OF THE INVENTION The invention of claim 1 has been made from the above-mentioned viewpoints, and is a cooking device similar to a rice cooker or the like, which has not been focused on in the past. It is an object of the present invention to detect a blow-up by a simple device and make the detection result usable as various control signals.

It is an object of the present invention to improve the detection device according to the first aspect of the present invention so as to have the respective effects described in the column of effects.

[0006]

Means for Solving the Problems According to the first aspect of the present invention, there is provided a temperature sensor (S) for detecting the temperature of the upper part of a ladle in a cooking pot, and the temperature sensor (S). And output means for issuing a blow-up signal indicating that the air is in a blow-up state in response to a change in the detected output from the temperature sensor (b) in a state in which the cooking pot is heated to the boiling point. S) after the detection temperature (SA) has continued for a certain time for a certain period of time, and configured to output a blow-up signal when detecting that the detection temperature (SA) has dropped below the certain temperature. is there.

The above solution works as follows. The temperature sensor (S) is located at the upper part of the rising area of the tongue in the cooking pot.
The detected temperature (SA) of (S) matches the temperature of the steam in the cooking pot. After that, the air bubbles in the bed increased and the temperature sensor
When the bubble reaches the position (S), the bubble is
Touch (S). As a result, the detected temperature (SA) drops temporarily. Because the bubble film is made of the rice cake,
This is because the temperature of the rice is lower than the temperature of steam when the cooking pot is at the boiling point.

When the detected temperature (SA) drops, the output means outputs a signal indicating that the cooking oil is being blown up, which means that it is detected that the inside of the cooking pot is in a blowing state. According to a second aspect of the present invention, in the first aspect,
It is intended to improve the accuracy of the detection of the sound of the cattle,
The solution adopted for this purpose is "output the output signal indicating that the air is in a blow-up state when the set temperature is detected that the detected temperature (SA) has dropped below the predetermined temperature".
That is.

According to this solution, the output signal indicating that the air bubbles are in a blow-up state is output when the air bubbles come from contact with the urethane a plurality of times, so that the detected temperature (SA) is lower than the fixed temperature. By detecting the operation once, malfunction can be prevented as compared with the case of outputting the output signal. According to a third aspect of the present invention, in the first or second aspect of the present invention, the location of the temperature sensor (S) is limited. A detection tube (23) having a closed inner lid, and an upper lid covering the upper region of the inner lid, and a temperature sensor (S) attached to the upper lid;
The temperature sensor (S) at the tip faces the upper end of the cooking pot through the detection tube (23) penetrating the inner lid. (S)
Is securely fixed to the upper lid by the detection tube (23), and it is possible to detect a blow-up at a stage before the air bubbles of the cattle reach the upper surface of the inner lid.

A fourth aspect of the present invention provides a temperature sensor (S)
The limited means is that the cooker is provided with an inner lid which directly closes a cooking pot and has a steam vent hole, and a certain space between the inner lid and the inner lid. A temperature sensor (S) is provided at the tip of a detection tube (23) attached to the upper lid, and the temperature sensor (S) is located between the inner lid and the upper lid. In this case, it is possible to detect a blow-up immediately after the air bubbles of the squid reach the upper surface of the inner lid.

[0011]

According to the first aspect of the present invention, since the rising of the squirt can be detected by the change in the detection output of the temperature sensor (S), the detection device is simple. Further, the blow-up signal as an output signal can be used as a signal for subsequent cooking control.

According to the second aspect of the present invention, malfunction can be prevented as compared with the case where a blow-up signal is issued only by detecting the blow-up once. The third aspect of the present invention has the advantage that the temperature sensor (S) can be securely mounted, and that the air bubbles can be detected at a stage before the air bubbles reach the upper surface of the inner lid. The invention according to claim 4 has an advantage that the temperature sensor (S) is securely mounted, and that the rising of the air bubbles can be detected immediately after reaching the upper surface of the inner lid.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment shown in FIG. 1 is an embodiment in which the present invention is applied to a rice cooker, in which a rice cooker (10) is housed in an inner shell (11) which is opened upward. The flame hole (B ₁ ) of the gas burner (B) is projected from an opening (12) provided at the bottom of the inner body (11) to provide a rice cooker of a type that cooks rice by gas-fired power.

The upper end opening of the rice cooker (10) is closed by an inner lid (21), and an upper lid (22) having a steam vent (221) is covered from above the inner lid (21). ing. The gap between the inner body (11) and the rice cooker (10) is the flame hole (B
Becomes a passage for the flue gas from _1), the upper end is in communication with a plurality of apertures (13) (13) provided on the body portion top end of the main body case (1), wherein an opening (12).

As a heater for keeping heat, an annular main heater (H ₁ ) is disposed below the bottom of the rice cooker (10) so as to have a certain distance from the periphery of the flame hole (B ₁ ), The upper lid (22)
An upper heater (H ₂ ) is built in the upper lid (22) so as to be in contact with the lower plate of the upper lid (22). The rice cooked above the bottom of the rice cooker (10) is heated and kept warm by the heat from the main heater (H ₁ ),
The inner lid (21) is heated by the upper heater (H ₂ ) incorporated in (22), thereby preventing dew condensation on the inner lid (21).

In order to enhance the heat insulation efficiency at the time of heat insulation, in this embodiment, a heat insulating material layer is provided on the outer peripheral surface of the body of the inner body (11).
(31) is formed, and the upper lid (22) has a heat insulating material (32).
Is filled. This rice cooker is provided with a valve device (V) that is controlled by an output from the control device (C) in a gas supply circuit to the gas burner (B) because the rice cooker is heated by gas-fired power. The device (V) is connected to a gas amount adjusting device (V ₁ ).

The gas amount adjusting device (V ₁ ) is provided with the control device
(C) The opening degree is controlled in response to a signal input from the apparatus, and the rice cooking operation is controlled. In addition, a temperature sensor (S) for detecting the temperature near the inner lid (21) in the rice cooker (10) to control the cooking power and to detect the time of extinguishing of the gas burner (B). ) Is provided, and the temperature sensor (S)
A detection tube (23) provided at the lower end protrudes downward from the center of the upper lid (22), and a knob (24) at the center of the middle lid (21) fits into the detection tube (23) in a press-fit state. Have been.

According to this, the inner lid (21) is detachably attached to the lower surface of the upper lid (22), and in the attached state, when the upper lid (22) is closed, the temperature sensor is closed.
(S) detects the temperature at the upper end in the rice cooker (10). Then, the detected temperature signal of the temperature sensor (S) is transmitted to the control device.
(C) is entered. In this example, a microcomputer is employed as the control device (C), and the control device (C) is configured to execute the flowchart shown in FIG.

Hereinafter, the actual operation of the above example will be described with reference to the flowchart. When the rice cooking operation is performed, the valve device (V) is opened and the gas amount adjusting device (V ₁ ) is opened, and then the gas burner (B) is ignited. Thereafter, the rice cooking operation is performed while controlling the thermal power. By this, rice cooker (10)
Temperature rises and the boiling point (100 ° C) in the course shown in Fig. 3
Reach When the state where the boiling point is reached is continued and the rice cooks further, the rice begins to be generated in the rice cooker (10).

When the detected temperature (SA) reaches the boiling point, the heating power of the gas burner (B) is maintained constant (step 01 (S
T01)), the timer (T ₁ ) is turned on, and when it is detected that the timer (T ₁ ) has expired (step 02 (ST02)), a counter for counting the number of times the detected temperature (SA) has dropped is counted. Is reset (step 03 (ST03)).

After that, the rice cake blows up as bubbles.
After filling below the inner lid (21), it reaches the steam vent holes (211) (211) provided in the center of the inner lid (21). When the bed comes into contact with the temperature sensor (S), the detected temperature (SA) decreases due to the above-described action. However, the detected temperature (SA) is monitored in step 04 (ST04), and the detected temperature (SA) is monitored. Falls below the boiling point, the coefficient value (CN) is added by "1" in step 05 (ST05). The monitoring state of the detected temperature (SA) is continued until the coefficient value (CN) becomes "3" (step 06 (ST06)). When the coefficient value (CN) becomes "3", a blow-up signal is issued. Output. In this case, the signal is displayed in step 07 (ST07), and the process shifts to the next rice cooking heating control state.

Thereafter, in step 08 (ST08), the detected temperature (SA) of the temperature sensor (S) is increased to the fire extinguishing temperature (gas burner).
(B) is monitored to see if it has reached the temperature at which cooking should be extinguished. The temperature in the rice cooker (10) changes with the progress of rice cooking as shown in FIG. 3, and when the rice cooking is completed, the detected temperature (SA) of the temperature sensor (S) rapidly rises. When the extinguishing temperature is reached, the gas burner (B) is extinguished (step 09 (ST09)). This fire extinguishing operation is performed by the valve
(V) by shutting off the gas circuit to the gas burner (B).

Thereafter, the warming device is turned on to start warming, and the main heater (H ₁ ) and the upper heater (H ₂ ) are controlled based on the detected temperature (SA) of the temperature sensor (S), and The temperature of the pot (10) is maintained at the set temperature. In the embodiment described above, the inner lid (21) is provided with a plurality of steam vent holes (211) (211),
The upper lid (22) is provided with a vapor vent hole (221), and these vapor vent holes (211) and (221) are set to have a smaller total area than conventional vapor vent holes. Therefore, at the time of keeping the temperature after the completion of the cooking of rice, the escape of heat from the cooked rice is suppressed, so that the heat retaining efficiency is good.

In the above embodiment, the upper lid (22)
A temperature sensor (S) is provided at the lower end of the detection tube (23) provided in
Although both the rice cooking and the heat retention are controlled only by the detection output of the temperature sensor (S), as shown in FIG.
The bottom of the rice cooker (10) may be detected by a heat responsive device (4) for automatic fire extinguishing. In this case, the rice cooker (1
Temperature sensor for detecting that the litter blows up in (0)
(S) is provided on the detection tube (23) connected to the upper lid (22).

In this embodiment, the thermal responsive device (4)
A thermosensitive cylinder (41) that contacts the bottom of the rice cooker (10) from below, a thermosensitive element (42) attached to the inner surface of the top of the thermosensitive cylinder (41), and a gas circuit to the gas burner (B). It is provided as a combination with a permanent magnet (43) interlocked with the valve device. The permanent magnet (43) is lifted up by the rice cooking operation by the operation lever (44) and is attracted to the thermosensitive element (42), and rice cooking is started by the operation of an igniter (not shown) that operates at the same time, and the rice cooking is heated. Be advanced.

During cooking rice, the heating power of the gas burner (B) is controlled by a control operation based on the detected temperature (SA) of the temperature sensor (S) provided in the detection tube (23), and the same as in the first embodiment described above. Is controlled. Thereafter, when the temperature reaches the fire extinguishing temperature, the permanent magnet (43) is transformed by the transformation of the thermosensitive element (42) so that the thermosensitive element (4
The operation lever (44) moves downward away from 2), the valve device closes, and the gas burner (B) is automatically extinguished.

After the automatic fire extinguishing, the main heater (H ₁ ) provided below the bottom of the rice cooker (10) and the upper heater provided above the inner shell (11).
(H ₂ ). In the above embodiment,
The temperature sensor (S) detects the temperature of the upper part of the rice cooker (10) as the temperature of the upper part of the rice blowing area, but as shown in FIG. 5, the inner lid (21) and the upper lid (22) The temperature near the vapor vent hole (211) is detected at the temperature of the space between the vent holes (211), and the temperature reaches the area that is discharged from the vapor vent hole (211) and reaches the vapor vent (221) of the upper lid (22). A configuration may be adopted in which a blow-up signal is output in the same manner as in the first embodiment according to a change in the detected temperature (SA) due to contact of the nebula with bubbles.

Also, in any of the above embodiments, the number of times the detected temperature (SA) has dropped from the boiling point or a constant temperature corresponding thereto is counted, and a blow-up signal is output in response to the counted value. Alternatively, a configuration may be employed in which a blow-up signal is output when the temperature has dropped from the constant temperature. In this case, if it is determined in step 04 (ST04) that the detected temperature (SA) has fallen, the blow-up signal is output as it is.

Further, in each of the above embodiments, the present invention is applied to a rice cooker provided with an inner lid, but the upper lid (22) is directly covered with the rice cooker (10) without the inner lid. Needless to say, the present invention can be applied to a rice cooker having such a configuration. Further, the squirt detection device of the present invention may be applied to the same kind of cookware other than the rice cooker.

[Brief description of the drawings]

FIG. 1 is a sectional view of a rice cooker according to an embodiment of the present invention.

FIG. 2 is a control device employed in the rice cooker according to the embodiment.
(C) Flow chart

FIG. 3 is a graph showing a change in detected temperature of the detection device (S) during the rice cooking process.

FIG. 4 is a sectional view of a gas rice cooker according to another embodiment.

FIG. 5 is a cross-sectional view of an example of mounting a temperature sensor (S) according to another embodiment.

[Explanation of symbols]

(10) ・ ・ ・ Rice cooker (11) ・ ・ ・ Inner body (B) ・ ・ ・ Gas burner (S) ・ ・ ・ Temperature sensor (21) ・ ・ ・ Middle lid (22) ・ ・ ・ Top lid (C) ・··· Control device (V ₁ ) ··· Gas amount adjusting device Note that the same reference numerals in each drawing denote the same or corresponding parts.

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[Procedure amendment]

[Submission date] June 26, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Isao Matsushita, Inventor 4-1-2, Hiranocho, Chuo-ku, Osaka City Inside Osaka Gas Co., Ltd. (72) Tomohiro Kitamoto 4-1-2, Hiranocho, Chuo-ku, Osaka City Osaka Gas Co., Ltd.

Claims (4)

[Claims] 1. A temperature sensor (S) for detecting a temperature of an upper part of a ladle in a cooking pot, and the temperature sensor (S).
And output means for outputting a blow-up signal indicating that the towel is in a blow-up state in response to the detected output change from the above, wherein the output means is in a state where the inside of the cooking pot is heated to the boiling point temperature. An apparatus for detecting the rising of a tongue of a cooking appliance, which outputs the above-mentioned rising signal when detecting that the temperature (SA) detected by the temperature sensor (S) has decreased after continuing at a certain temperature for a certain period of time. 2. The cooking machine according to claim 1, wherein the output means is configured to indicate that the air conditioner is in a blow-up state when a predetermined number of times that the detected temperature (SA) has dropped below the predetermined temperature is detected. Lift detection device. 3. A cooker includes an inner lid for directly closing a cooking pot, and an upper lid covering an upper area of the inner lid, and a temperature sensor (S) for detecting the temperature of the detection tube (23) attached to the upper lid. 3) wherein the temperature sensor (S) at the end faces the upper end of the cooking pot, with the detection tube (23) passing through the inner lid. A device for detecting the rising of a tongue. 4. A cooker includes an inner lid directly closing a cooking pot and having a steam vent hole, and an upper lid which is provided with a certain space between the inner lid and covers a region above the inner lid. , Temperature sensor
(S) is provided at a tip of a detection tube (23) attached to the upper lid, and the temperature sensor (S) is configured to face the steam vent hole at an intermediate portion between the inner lid and the upper lid. Claim 2
The device for detecting the rising of the tongue of a cooking device according to claim 1.