JP2002085256A - Steam pot with operation controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically control heating by a steam pot by detecting the abnormality of a steam-feeding control valve or a temperature sensor. SOLUTION: In the steam pot, a jacket 2 is provided under an inner pot 1, a steam-feeding piping 5 provided with the steam-feeding control valve 6 in its middle part is connected to the jacket 2 to allow an operation controller 3 to control the valve 6 based on information from temperature sensors 8 detecting temperature in the jacket. The two sensors 8 are provided at the jacket 2 and the controller 3 compares measured values from the two sensors 8 with each other to output the inspection of the temperature sensor when the temperature difference between the measured values is larger than a prescribed temperature difference and to output the abnormality of the valve 6 when the temperature difference between the measured values is smaller than a prescribed temperature difference and the measured value of the temperature in the jacket 2 does not reach a target temperature although a controlling command is outputted to the valve 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam pot in which a jacket is provided at a lower portion of an inner pot and steam is introduced into the jacket to heat food stored in the inner pot.

[0002]

2. Description of the Related Art There is a steam pot provided with a jacket covering a lower wall surface of an inner pot and a steam supply pipe connected to the jacket. The steam pot holds the food to be heated in the inner pot, introduces steam into the jacket through a steam supply pipe provided with a steam supply control valve on the way, and heats the inner pot wall by the heat of the introduced steam. And heat the food in the inner pot.

[0003] In the case of heating food in a steam pot, it is common for a user of the steam pot to manually operate a steam supply control valve. In the case of steam supply control based on the user's intuition, erroneous operation is likely to occur, and long-time operation imposes a heavy burden on the user. Therefore, it is desired to automate the steam supply control. If a temperature sensor is provided on the jacket and the opening and closing of the steam supply control valve is controlled based on the temperature measured by the temperature sensor, the steam supply can be automatically controlled. However, in this case, if an abnormality occurs in the temperature sensor or the steam supply control valve, proper heating cannot be performed.

[0004] When an abnormality occurs in the temperature sensor, the temperature sensor 8 outputs a value different from the actual temperature to the operation control device 3 as the temperature in the jacket, so that the food is heated more than necessary and burnt or the food is heated. May be insufficient.
Further, when an abnormality occurs in the steam supply control valve, the steam supply control valve cannot be controlled as instructed by the operation control device, so that proper heating cannot be performed in this case as well. If an abnormality cannot be detected when an abnormality occurs, the process proceeds without proper heating. Therefore, in order to automate the heating control, it is necessary to provide a means for notifying the abnormality when an abnormality occurs in the steam supply control valve or the temperature sensor.

[0005]

The problem to be solved by the present invention is to automate the heating control by the steam cooker so that abnormalities of the steam supply control valve and the temperature sensor can be detected.

[0006]

A jacket is provided at the lower part of the inner pot, and a steam supply pipe provided with a steam supply control valve on the way is connected to the jacket, and a temperature sensor for detecting the temperature inside the jacket is provided. An operation control device controls the steam supply control valve based on the information, and introduces steam into the jacket to heat the food stored in the inner pot. The jacket has two temperature sensors. Is provided so that the measured values from the two temperature sensors are respectively transmitted to the operation control device. The operation control device compares the measured values from the two temperature sensors and determines that the temperature difference between the measured values is a predetermined temperature. If the difference is larger than the difference, a temperature sensor check is output, and if the temperature difference between the measured values is smaller than the predetermined temperature difference and a control command is output to the steam supply control valve, If the measured value of Tsu bets in temperature does not reach the target temperature, to output the steam supply control valve abnormalities.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a steam pot embodying the present invention. The inner pot 1 has a hemispherical bottom, an open top, and a lower portion of the inner pot covered with a jacket 2.
A steam supply pipe 5 is connected to the jacket 2, and a steam supply control valve 6 is provided in the middle of the steam supply pipe 5. Two temperature sensors 8 are provided on the jacket 2, and the two temperature sensors are connected to the operation control device 3 via a communication line. The operation control device 3 controls opening and closing of the steam supply control valve 6. The operation control device 3 is provided with a set temperature input device 4 for inputting a target temperature at predetermined time intervals, and starts operation of the steam cooker. , The target temperature is acquired at predetermined time intervals. In the operation control device 3, a reference value for detecting an abnormality of the temperature sensor 8 and the steam supply control valve 6 is set.

When heating the food, the food 7 to be heated is stored in the inner pot 1, and the operation control device 3 controls the heating. The operation control device 3 compares the target temperature taken every predetermined time with the measured temperature measured by the temperature sensor 8 and controls the steam supply control valve 6 so that the measured temperature becomes equal to the target temperature. When the measured temperature is lower than the target temperature, the operation control device 3 opens the steam supply control valve 6 and supplies steam into the jacket 2 through the steam supply pipe 5. When steam is supplied into the jacket 2, the temperature in the jacket rises, and when the temperature measured by the temperature sensor 8 reaches the target temperature, the operation control device 3 performs control to close the steam supply control valve 6. By adjusting the temperature in the jacket 2, the temperature at which the food 7 is heated is adjusted.

The operation control unit 3 detects an abnormality in the temperature sensor 8 and the steam supply control valve 6 when the abnormality occurs. The operation control device 3 detects a difference between the temperatures measured by the two temperature sensors 8 and, when the difference between the measured temperatures becomes larger than a predetermined temperature difference, notifies that the temperature sensors need to be checked. I do. The operation control device 3 is in a state where the difference between the temperatures measured by the two temperature sensors 8 is smaller than the predetermined temperature difference, and even if a predetermined time has elapsed since the opening or closing signal was output to the steam supply control valve 6, If the measured temperature does not reach the target temperature, it notifies that the steam supply control valve is abnormal.

When the difference between the temperatures measured by the two temperature sensors 8 becomes larger than the predetermined temperature difference, it can be determined that an abnormality has occurred in one of the temperature sensors. If the difference between the temperatures measured by the two temperature sensors 8 is smaller than the predetermined temperature difference, it can be determined that the temperature sensors are normal, and the temperature sensor 8 is normal and the measured temperature does not reach the target temperature. In this case, it can be determined that the steam supply control valve 6 is abnormal. If an abnormality occurs during food heating, it is possible to determine the location of the abnormality, and to report the abnormality, so that it is possible to respond to the abnormality. In addition, unnecessary heating or insufficient heating can be prevented.

[0011]

By implementing the present invention, heating can be performed more than necessary, and heating control using a steam pot can be performed without insufficient heating.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner pot 2 Jacket 3 Operation control device 4 Set temperature input device 5 Steam supply pipe 6 Steam supply control valve 7 Food 8 Temperature sensor

Claims (2)

[Claims] 1. A jacket is provided at a lower portion of an inner pot, and a steam supply pipe provided with a steam supply control valve on the way is connected to the jacket, and based on information from a temperature sensor for detecting a temperature in the jacket. An operation control device controls a steam supply control valve and introduces steam into the jacket, thereby heating food stored in the inner pot. The steam pot is provided with two temperature sensors in the jacket and operated. The measured values from the two temperature sensors are respectively transmitted to the control device, and the operation control device compares the measured values from the two temperature sensors, and the temperature difference between the measured values is larger than the predetermined temperature difference. In this case, even if the temperature sensor check is output and the temperature difference between the measured values is smaller than the predetermined temperature difference and a control command is output to the steam supply control valve,
A steam cooker having an operation control device characterized in that when the measured value of the jacket internal temperature does not reach the target temperature, a steam supply control valve abnormality is output. 2. A steam cooker having the operation control device according to claim 1, wherein the target temperature of the jacket temperature is set every predetermined time, and the operation control device sets the target temperature of the jacket temperature every predetermined time. Taking the temperature, so that the measured temperature measured by the temperature sensor is equal to the target temperature,
A steam cooker having an operation control device for controlling a steam supply control valve.