JPS6319171B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat-sensitive device for a cooking device used in a general household, and particularly to a cooking device in which the cooking device main body and the temperature controller are separated.

Conventional structure and its problems Conventionally, this type of heat-sensitive device has a stainless steel pipe as a heat-sensitive body, with an amber with a different coefficient of thermal expansion fixed at its tip, and the temperature is determined by the difference in the amount of expansion between the pipe and the amber. It detected this, magnified it, opened and closed the contacts, and controlled the electrical circuit. However, this physical method requires a certain length of heat-sensitive material, a space corresponding to the length of the heat-sensitive part, and the difference in expansion itself is small, so accurate control is difficult. There were some unexpected flaws.

OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides a heat-sensitive device that enables accurate temperature control.

Structure of the Invention The heat-sensitive device of the present invention comprises a cap-shaped sensor case made of a metal material with excellent thermal conductivity and open on one side, a sensor made of a heat-sensitive resistance element inserted into the sensor case, and an electrical connection between the sensor and the sensor case. a control circuit configured to control the heating of the cooker by contacting with the target; a control case housing the control circuit;
It is equipped with a sensor pipe that connects the opening of the sensor case and the control case, and can accurately detect and control the temperature of the controlled part.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figures 1 and 2, 1 is a pressure cooker equipped with a sheathed heater 5 at the bottom, 2 is a pot handle, 3 is a lid handle, and 4 is a safety device that operates when the pressure inside the pot reaches a certain pressure. The weight valve as
7 is an aluminum sensor case with good heat conduction, 8
9 is a thermistor as a temperature sensor which is inserted into a hollow part provided in the sensor case 7 together with an adhesive having good thermal conductivity and whose lead wire is caulked at the opening of the sensor case 7, 9 is a solid type temperature fuse, and 10 is the sensor. a control circuit for controlling the heat generation of the sheathed heater 5 by the signal of 8; 11;
12 is a control case in which the control circuit 10 is placed, and 12 is a temperature (fuse) with the sensor case 7 caulked to one end.
9 and is a sensor pipe fixed to the control case 11. A heat-sensitive piece 6 is welded to the bottom of the pressure cooker 1 and has a heat-sensitive hole into which a sensor case 7 and a sensor pipe 12 are inserted.

The operation in the above configuration will be explained. When the sensor case 7 is inserted into the heat sensitive piece 6, the sheathed heater 5
The terminal of the control circuit 10 is connected to the terminal of the control circuit 10, and the sheathed heater 5 is energized. The temperature inside the pressure cooker 1 rises, and the temperature of the heat-sensitive piece 6, sensor case 7, and sensor 8 also rises in proportion to it. When the temperature approaches the set temperature, the sensor 8 detects the temperature, transmits a signal to the control circuit 10, starts controlling the heat generation of the sheathed heater 5, and controls the cooking pressure by controlling the temperature inside the pot to the set temperature. Since the sensor case 7 is inserted into the hole of the heat-sensitive piece 6, which accurately indicates the temperature inside the pan, the sensor 8 can accurately detect the temperature inside the pan.

Effects of the Invention As is clear from the above description, the heat-sensitive device of the present invention has a sensor inserted into a cap-shaped case made of aluminum with particularly good heat conductivity and opened on only one side, and which is capable of controlling the temperature of the object to be controlled. In order to accurately detect the temperature of the heat-sensitive piece, the sensor case is made cylindrical so that it can be inserted into the hole provided in the heat-sensitive piece, and the sensor case and control case are connected using separate sensor pipes. The temperature of the controlled object can be detected accurately, and the temperature of the controlled object can be reliably controlled.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a pressure cooker showing an embodiment of the present invention, Fig. 2 A is an enlarged sectional view of a main part of the same pressure cooker, and Fig. 2 B is an enlarged view of another main part of the same pressure cooker. FIG. 7...Sensor case, 10...Control circuit, 1
1...Control case, 12...Sensor pipe.

Claims (1)

[Claims] 1. A cap-shaped sensor case made of a metal material with excellent thermal conductivity and open on one side, a sensor consisting of a heat-sensitive resistance element inserted into the sensor case, and electrically connected to the sensor to heat the cooking device. A heat-sensitive device for a cooker, comprising: a control circuit configured to control a control circuit; a control case housing the control circuit; and a sensor pipe connecting an opening of the sensor case and the control case.