JPH0414002B2 - - 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 general households, and particularly to one in which the cooking device main body and temperature controller can be separated.

Conventional structure and its problems Conventionally, in this type of heat-sensitive device, an amber with a different coefficient of thermal expansion is fixed at the tip inside a stainless steel pipe as a heat-sensitive body, and the amount of expansion between the pipe and the amber is controlled. There was a physical method of controlling electrical circuits by detecting the temperature difference and magnifying this difference to open and close contacts. However, this physical method requires a certain length of heat-sensitive material, a space corresponding to the length of the heat-sensitive material, and the difference in expansion itself is small. However, there were drawbacks such as the fact that precise control could not be expected.

Furthermore, conventionally, in home cooking appliances such as electric deep fryers and electric pressure cookers, the cooking appliance body and the temperature regulator having a heat-sensitive part have been configured to be separable so that the cooking appliance can be washed completely. In this type of cooker, a sheathed heater is welded to the bottom of the cooker body,
Only the terminal pin provided at the end of the sheathed heater is exposed as an electrical component so that the cooker can be washed completely. However, when a safety device such as a temperature fuse is installed at the bottom of the main unit, it must be electrically connected to the sheathed heater via lead wires, which complicates the configuration and increases the number of exposed parts, making it difficult to wash the device. There was also a drawback that the original function was lost. Therefore, as shown in FIG. 1, a through hole is provided in the temperature controller case 6, and this through hole is covered with a cover 4 having good thermal conductivity such as aluminum through an insulating sheet 5 having relatively good thermal conductivity. temperature fuse 3
There is one in which the bottom temperature of the cooking device main body 1 can be sensed by attaching a temperature regulator facing the cooking device main body 1 to the cooking device main body 1. However, with this configuration, if a gap is generated between the bottom of the cooker main body 1 and the cover 4 due to the cover 4 being deformed by external force or external force being applied to the temperature regulator case 6, the main body 1 There were problems such as the inability to sensitively sense the temperature at the bottom of the tank.

Purpose of the Invention The present invention provides a heat-sensitive device for a cooker that solves these conventional problems and allows accurate temperature control, improved safety, and ease of assembly. It is.

Structure of the Invention In order to achieve this object, the heat-sensitive device for a cooker according to the present invention includes a sensor pipe in which a temperature fuse is located inside, and a sensor in a heat-sensitive piece provided on a cooker body equipped with a heater at the bottom. It is equipped with a removable heat-sensitive unit that is integrated with a sensor case located inside. Therefore, when the heat-sensitive unit is attached to the main body of the cooker, the sensor case and sensor pipe are inserted into the heat-sensitive piece whose temperature is almost the same as the temperature at the bottom of the main unit, so the temperature of the controlled part can be accurately sensed. It is something that can be controlled.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figures 2 and 3, 7 is the pressure cooker body, 8 is the main body handle, 9 is the lid handle, and 10 is a weight-type safety valve that is set to operate when the pressure inside the pot exceeds the normal control pressure. , 11 is a sheathed heater welded to the bottom of the pressure cooker body 7, 12 is a heat sensitive piece welded to the bottom of the pressure cooker body 7, and a hole 14 is provided so that a sensor case 13 and a sensor pipe 19 can be inserted. be. sensor case 1
3 is an aluminum cylinder with a bottom that houses a sensor 15 that detects the temperature inside the pot, and a sensor pipe 19 is attached to its opening, and the end of this pipe 19 is provided on the outer periphery of the sensor case 13. The sensor pipe 19 is tightened by caulking the groove.
Fixed. Reference numeral 21 denotes an insulating plate, which has a width that can be inserted into the sensor pipe 19, and has a narrow portion 24 at its tip so that it can be inserted into the sensor case 13, and a V in the center of the tip.
A letter-shaped notch 22 is provided. In addition, in the wide part 25 of the insulating plate 21, in order to accurately sense the temperature inside the pressure cooker body 7, a notch 23 is formed on the tip side diagonally downward from the outside to the middle of the insulating plate 21.
is provided. The sensor 15, which has a lead wire 26 bent into a U-shape, is attached to the insulating plate 21 by hooking the bent portion into a notch 22 at the tip of the insulating plate 21. Reference numeral 17 denotes a solid temperature fuse, which is attached to the insulating plate 21 by hooking the bent portion of the lead wire 26 into the notch 23.

The insulating plate 21 to which the sensor 15 and temperature fuse 17 are attached is inserted into the sensor pipe 19 after the wide portion 25 is covered with an insulating tube 20. The open side of the sensor pipe 19 is fixed to the control device case 16. A control device 18 controls the amount of heat generated by the sheathed heater 11 based on a signal from the sensor 15, and is fixed within the control device case 16.

Next, the operation in the above configuration will be explained. The heat sensitive part of the temperature regulator, which includes the sensor case 13, sensor 15, control device cover 16, temperature fuse 17, control device 18, sensor pipe 19, insulating tube 20, insulating plate 21, etc., is inserted into the hole 14 provided in the heat sensitive piece 12. When it is inserted, the terminal of the sheathed heater 11 and the blade holder of the temperature regulator are connected, and the sheathed heater is energized. When the temperature inside the pot approaches the set temperature, the sensor 15 senses the temperature, and the control device 18 controls the amount of heat generated by the sheathed heater 11 to maintain the temperature inside the pot at the set value, thereby controlling the cooking pressure. Here, if the control device 18 fails and the sheathed heater 11 continues to be energized and the temperature inside the pot continues to rise, the temperature fuse 17 senses the temperature through the heat sensitive piece 12 and blows it, turning off the energization of the sheathed heater 11. unlock. Sensor 15, temperature fuse 17
Since it is located in the heat-sensitive piece 12 that can easily sense the temperature inside the pot, the temperature inside the pot can be accurately controlled, and in the event of an abnormality, the energization can be quickly turned off. In addition, the sensor 15 is
In addition, since the temperature fuse 17 is positioned, there is no variation due to assembly, and it operates stably, improving safety. Also, since the heat-sensitive parts can be concentrated, the configuration is rational and testing is easy. By attaching the sensor and temperature fuse with an insulating plate, the heat-sensitive parts can be made into a unit, making assembly easier and improving serviceability.

That is, a cap-shaped sensor case 13 made of a metal material with excellent thermal conductivity and open on one side, a sensor pipe 19 fixed to the opening of the sensor case 13, and a sensor pipe 19 provided at the tip of an insulating plate 21. A sensor 15 made of a heat-sensitive resistance element covered with an insulating tube is hooked into the notch 22,
The lead wire of the temperature fuse 17 bent into a U-shape is hooked into the notch 23 provided in the insulating plate 21, and the insulation tube 2 is connected to the temperature fuse 17.
0, the heat sensitive unit covered with the insulating plate 21 is inserted into the sensor pipe 19, and the sensor 15 is
Inside the sensor case 13, a temperature fuse 17 is arranged to be located inside a sensor pipe 19.

With this configuration, when the temperature regulator is attached to the cooking device main body, the sensor case 13 and the sensor pipe 19 are inserted into the heat sensitive piece 12 which exhibits a temperature almost equal to the temperature at the bottom of the cooking device main body, so that the temperature can be controlled accurately. can sense and control the temperature of the
In the event of an abnormality, the power can be sensitively turned off using a temperature fuse. In addition, the sensor 1 is
5 and temperature fuse 17 are determined, stable operation is obtained without displacement of the sensor and temperature fuse due to assembly, and assembly is also easy.

Effects of the Invention As described above, in the present invention, the sensor and temperature fuse are installed in the sensor case and the sensor pipe so that they are located in the heat-sensitive piece that can easily sense the temperature in the pot. It can accurately sense temperature and has great practical effects.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional pressure cooker, Fig. 2 is a sectional view of a pressure cooker showing an embodiment of the present invention, Fig. 3A is a top sectional view of main parts of the same pressure cooker, Figure 3B is a front sectional view of the main parts of the pressure cooker, and Figure 3C is an enlarged view of the main parts of the pressure cooker. 12...Heat-sensitive piece, 13...Sensor case, 1
5...Sensor, 17...Temperature fuse, 19...
...sensor pipe.

Claims (1)

[Claims] 1 A heat-sensitive unit, which integrates a sensor pipe with a temperature fuse inside and a sensor case with a sensor inside, is removably attached to a heat-sensitive piece installed on the cooker body with a heater attached to the bottom. Cooker heat sensitive device.