JPH08159478A - Temperature sensor - Google Patents

Abstract

PURPOSE: To provide a mechanism for preventing the adhesion of cooking dew in a heating and cooking device in which a bottom surface temperature of a pan is sensed to perform a combustion control in an easy and less-expensive assembly. CONSTITUTION: A length size A of a dew adhesion preventing part 13 of a holder 16 is set to be longer than an upward or downward sliding stroke B of the holder 16 under a mounting of a cooking pan and then a range of a supporting column where a stopper 12 for the holder is slid is covered by a dew adhesion preventing cover 13 so as to prevent adhesion of dew.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature cooker for a gas stove or the like, which is in contact with the bottom of a pot and detects the temperature of the pot bottom.

[0002]

2. Description of the Related Art Conventionally, in order to prevent fire and burning of tempura oil, the temperature of the bottom of a cooking pot is detected by a temperature sensing element, and heating is performed to stop combustion when the detected temperature is above a predetermined temperature. Cookers are known. For example, in FIG.
The gas stove shown in (1) is provided with a temperature sensor 30 having a thermistor 35 for detecting the temperature, the temperature of the bottom of the cooking pot 7 is detected by the thermistor 35, and the controller 17 determines whether or not the detected temperature is equal to or higher than a predetermined temperature. Then, the opening / closing of the solenoid valve 18 provided in the gas passage is controlled based on the determination result.

As shown in FIG. 4, the temperature sensor 30 is a holder 36 which contacts the bottom of the pan and transfers heat to the thermistor 35.
And a spring 31 for urging the holder 36 so as to press the holder 36 in the abutting direction of the pot bottom in order to increase the degree of adhesion to the pot bottom,
A support column 34 for supporting it and a stopper portion 32 for restricting the uppermost position of the holder 36 above the Gotoku 5 are provided. From the stopper portion 32 of the holder 36, the soup draining portion 3
3, the broth 39 is the stopper portion 3 of the holder 36.
It is known to prevent wraparound.

[0004]

[Problems to be Solved by the Invention] However, broth 3
Although the wraparound of 9 is prevented, in such a conventional device, the broth 39 may adhere to the sliding portion of the support column 34 and interfere with the sliding of the holder 36. Boiled soup 39
However, as shown in FIG. 4 (A), the boiled liquid 39 attached to the holder 36 when the spilled spilled the sap 39
4 gradually drips on the sliding portion of No. 4, and if this is repeated over a long period of time, the amount of the broth 39 that adheres to the column 34 also increases. Therefore, as shown in FIG. 4 (B), the holder 36 does not slide smoothly in the sliding range of the stopper portion 32. An object of the temperature sensor of the present invention is to solve the above problems and to maintain smooth sliding of the holder.

[0005]

A temperature sensor of the present invention for solving the above-mentioned problems is mounted on a cylindrical holder upper part,
A temperature sensing element that senses the bottom temperature of the cooking pot through the upper surface of the holder, a support column that is inserted in the cylinder of the holder with play, and supports the holder by urging the holder upward by a spring, and in the cylinder of the holder. In a temperature sensor provided with a stopper that is provided on the abdomen and is urged upward, the uppermost position of the holder is regulated at a position higher than Gotoku, in the holder, the dimension from the stopper to the lower end of the cylinder is
The gist is to make it larger than the vertical sliding stroke of the holder by placing the cooking pot.

[0006]

In the temperature sensor of the present invention having the above structure, the dimension from the stopper of the holder to the lower end of the cylinder is larger than the vertical sliding stroke of the holder when the cooking pot is placed, so that the stopper of the holder slides. The area of the supporting column is always kept covered with a cylinder, and the juice does not adhere to the sliding range of the stopper of the supporting column. For this reason, the attached broth does not hit the stopper and the holder always slides smoothly.

[0007]

EXAMPLES In order to further clarify the constitution and operation of the present invention described above, preferred examples of the temperature sensor of the present invention will be described below. FIG. 1 is a schematic configuration diagram of a stove equipped with a temperature sensor as an example. The stove of the present embodiment is provided with a burner body 3 for burning a fuel gas, and an annular burner head 4 is detachably mounted coaxially with the head of the burner body 3. A temperature sensor 10 is provided at the center of the burner head 4 to contact the bottom of the cooking pot 7 and detect the temperature of the bottom of the pot. The temperature sensor 10 is provided with a thermistor 15 that increases or decreases the electric resistance value according to the detected temperature.

The thermistor 15 is electrically connected to a controller 17 for controlling combustion, and the controller 17 monitors whether the temperature detected by the thermistor 15 is equal to or higher than a predetermined temperature. Further, the controller 17 is electrically connected to an electromagnetic valve 18 that opens and closes the gas flow path, and when it determines that the detected temperature is equal to or higher than a predetermined temperature, it issues a valve closing command to the electromagnetic valve 18 to stop combustion. To do.

As shown in FIG. 2, the temperature sensor 10 is provided with a cylindrical holder 16 provided with a heat receiving portion 2 at a portion which abuts on the bottom surface of the cooking pot 7, and the center of the back surface of the heat receiving portion 2 is from the bottom surface of the pot. The thermistor 15 for detecting the heat transfer of The holder 16 is provided so that the cylindrical column 14 fixed to the body is covered with the cylindrical portion. Further, the upper end portion of the support column 14 is formed by expanding the pipe, and a spring 11 for urging the holder 16 in the pot bottom contact direction is coaxially provided inside the expanding pipe portion 8.

The column 1 is provided at the middle portion of the cylinder of the holder 16.
4 is provided with a stopper portion 12 having an inner diameter smaller than the outer diameter of the pipe expanding portion 8 and the stopper portion 12 and the pipe expanding portion 8 of the column 14 contact each other, whereby the uppermost position of the holder 16 is regulated above Gotoku 5. At the same time, the holder 16 urged by the spring 11 is prevented from coming off. The holder 16 slides up and down by sliding on the outer peripheral surfaces of the stopper portion 12 and the column 14. Further, the holder 16 is extended downwardly from the stopper portion 12, and the extension portion serves as a broth adhesion preventing portion 13 having a sufficiently large inner diameter with respect to the column 14.

When the cooking pot 7 is placed, as shown in FIG. 2B, the spring 11 is compressed by the weight of the cooking pot 7,
The holder 16 slides on the support 14 while the heat receiving portion 2 is in contact with the cooking pot 7. Further, the holder 16 is provided with a play on the fixed support 14 so that the heat receiving portion 2 comes into surface contact with the bottom surface of the cooking pot 7. That is, even if the cooking pot 7 is tilted and placed, the inner diameter of the holder 16 and the struts 14 are set so that the heat receiving portion 2 closely contacts the bottom face of the pot.
A gap is provided between the outer diameter of the expanded tube portion 8 and the inner diameter of the stopper portion 12 of the holder 16 and the outer diameter of the support column 14.

As described above, the heat receiving portion 2 of the holder 16 is surely brought into surface contact with the bottom of the pan.
If the broth 9 adheres to the sliding surface, a problem may occur in which the smooth sliding of the holder 16 is hindered. Normally, the stopper portion 12 of the holder 16 is at the lowest position even if it is spilled while the pot is placed, and the squeeze 9 is not applied to the sliding surface of the column 14 covered by the holder 16, but after the pot is taken out, the holder is removed. Boiled broth 9 hanging on 16 hangs up on pillar 14
Will adhere to the sliding parts of.

Therefore, the stopper portion 12 of the holder 16
The length dimension A of the broth adhesion preventing portion 13 is made larger than the vertical sliding stroke B of the holder 16 when the cooking pot 7 is placed so that the broth 9 does not adhere to the sliding surface of the holder 16 and the stopper 14. The sliding surface between the portion 12 and the support 14 is always covered with the broth adhesion preventing portion 13. Further, even if the broth 9 adheres below the sliding portion of the stopper portion 12, a large dripping drips down as it is, and the remaining liquor only enters between the cylinders without any problem.

According to the embodiment described above, the stopper portion of the holder 16 is constructed by a simple mechanism such that the broth adhesion preventing portion 13 having a length longer than the vertical sliding stroke of the holder 16 when the cooking pot 7 is placed is extended. It is possible to prevent the juice from adhering to the sliding portion between the column 12 and the support 14, and it is possible to prevent the contact of the temperature sensor due to the sticking of the holder 16 due to the adhering of the juice and the partial contact with the bottom of the cooking pot. Therefore, the reliability of the safety device that senses the temperature of the bottom of the pot and prevents fire due to overheating of the tempura oil or the like is improved. Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, a rice cooker,
It may be applied to a gas appliance provided with a temperature sensor such as an oven, and it goes without saying that the invention can be implemented in various modes without departing from the scope of the present invention.
Further, although the thermistor is used as the temperature sensitive element in the embodiment, it is not limited to such an embodiment and may be, for example, a bimetal, a shape memory alloy, a magnetic sensor, an expansion sensor or the like.

[0015]

As described above in detail, according to the temperature sensor of the present invention, the size from the stopper to the lower end of the cylinder is made larger than the vertical sliding stroke of the holder when the cooking pot is placed. Therefore, the excellent effect that the boiled liquid fixed to the column does not hit the stopper and the smooth sliding of the holder can be surely maintained.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a gas stove as an example.

FIG. 2 is an enlarged comparison diagram of a temperature sensor of the embodiment in a state without a pot and a state of placing a pot.

FIG. 3 is a schematic configuration diagram of a conventional gas stove.

FIG. 4 is an enlarged comparison view of a conventional temperature sensor with and without a pan.

[Explanation of symbols]

 2, 37 ... Heat receiving part 3 ... Burner 5 ... Gotoku 7 ... Cooking pan 8,38 ... Tube expansion part 10, 30 ... Temperature sensor 11, 31 ... Spring 12, 32 ... Stopper 13 ... Boiled water adhesion prevention part 14, 34 ... Strut 15 , 35… Thermistor 16, 36… Holder A… Length dimension of boiled water adhesion prevention part B… Vertical slide stroke of holder

Claims (1)

[Claims] 1. A temperature-sensitive element which is mounted on an upper portion of a cylindrical holder and senses a pot bottom temperature of a cooking pot through an upper surface of the holder, and is inserted in a barrel of the holder with play, and the holder is lifted by a spring. In a temperature sensor provided with a column for urging and supporting in a direction, and a stopper which is provided in a cylinder abdomen of the holder and which regulates the uppermost position of the holder urged upward in a position above Gotoku, the holder is The temperature sensor is characterized in that the dimension from the stopper to the lower end of the cylinder is larger than the vertical sliding stroke of the holder when the cooking pot is placed.