JP3326738B2 - Temperature sensor for cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature sensor for a cooking appliance, and more particularly, to a temperature sensor for a cooking appliance used in a cooking appliance in which an object to be heated can be freely attached to and detached from a heating object.

[0002]

2. Description of the Related Art This type of cooker temperature sensor is used, for example, to detect the temperature of an inner pot of a rice cooker. As shown in FIG. 3, the rice cooker is configured such that an inner pot 303 that is a body to be heated can be attached to and detached from an outer pan 302 that is a body that is fixed to a rice cooker main body 301. In order to measure the temperature of the inner pot 303, a cooker temperature sensor 304 is attached to the outer pot 302 (or the rice cooker main body). Furthermore, in order to detect the abnormally high temperature of the inner pot 303,
A thermal fuse 305 is attached to the outer surface of the outer pan 302.

A conventional cooker temperature sensor 304 is shown in FIG.
As shown in FIG. 7, the apparatus has a holder 401 fixed to an outer pot or a rice cooker main body, and a movable body 402 held by the holder 401 so as to be movable in the vertical direction in the figure. This movable body 402 becomes a heat-sensitive body of the temperature sensor.

The movable body 402 is a cylindrical movable body case 40.
3, an aluminum lid 404 attached to the tip of the movable body case 403, a thermistor element 405 housed in the aluminum lid 404, a lead wire 406 connecting the thermistor element 405 to an external circuit (not shown), and a thermistor element 405. A connection member 407 for connecting the lead and the lead wire 406 to each other, and a resin 408 for covering the connection member 407 and a part of the lead and the lead wire 406 of the thermistor element 405 and fixing the thermistor element 405 to the movable body case 403. The spring 40 is housed in the movable body case 403 and biases the movable body case 403 upward in the drawing.
9.

[0005] When the inner pot is set in the outer pot of the rice cooker, the outer peripheral surface of the inner pot contacts the aluminum lid 404 and pushes the movable body 402 toward the holder. As a result, the spring 409 contracts, and the reaction force presses the aluminum lid 404 into contact with the outer surface of the inner pot.
As a result, the temperature of the inner pot can be detected by the thermistor element via the aluminum lid 404.

[0006]

The conventional temperature sensor for a cooking appliance is used only for measuring the temperature of the object to be heated of the cooking appliance, and is different from a temperature fuse for detecting an abnormally high temperature of the object to be heated. Body. For this reason, the cooking device using the cooking device temperature sensor has a problem that the number of components is large, the component cost is high, and the number of assembly steps is also large.

[0007] Further, the thermal fuse is mounted on the outer surface of the heating body of the cooker, and there is a problem that it takes time from the occurrence of an abnormally high temperature of the heated body to the detection thereof.

It is an object of the present invention to provide a temperature sensor for a cooking appliance capable of detecting not only a normal temperature of an object to be heated but also an abnormally high temperature.

Another object of the present invention is to provide a cooker temperature sensor that can reduce costs by reducing the number of components of the cooker and the number of assembly steps.

It is a further object of the present invention to provide a cooker temperature sensor capable of quickly detecting an abnormally high temperature of a heated object.

[0011]

According to the present invention, there is provided a cooker for detecting the temperature of a heated body by contacting the heated body when the removable heated body is mounted on the heated body. In a temperature sensor, a thermistor element and
It has a thermal fuse and contacts the object to be heated.
Aluminum lid and the thermo-sensitive element.
The case in which the Lumi-Fitter is fitted, and the case is moved in one direction.
A holder for movably holding the thermal fuse,
One of the two leads is close to the aluminum lid
Bend the lead so that it is
A temperature sensor for a cooking appliance characterized in that a high heat conductor is disposed between a lead and the aluminum lid .

[0012]

[0013]

Further , according to the present invention, a removable heated object is provided.
When the body is attached to the heating body,
To a temperature sensor for a cooker that detects the temperature of the object to be heated.
Thermistor element and temperature hue
Aluminum foil that comes into contact with the body to be heated.
And the aluminum lid for accommodating the temperature sensing element.
The case to be fitted and the case are kept movably in one direction.
And a holder for lifting, in the case, an insulating wall for partitioning between the temperature fuse and the thermistor element
Provided with the two leads and between two insulating walls separating each between the leads of the temperature fuse of the thermistor element is provided, furthermore, of the case, the server
Install a window at a position corresponding to the vicinity of the tip of the lead of the
Inject the adhesive from the window and pull out the lead
The connection point with the output lead can be fixed to the case.
A temperature sensor for a cooking appliance characterized by
You .

[0015]

[0016] In any of the above cooker temperature sensors.
Also, a slit is formed in the case, a rib corresponding to the slit is formed in the holder, and rotation of the case with respect to the holder is prevented.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1A and 1B show an embodiment of the present invention. Cooker temperature sensor 1 shown in FIG.
00 denotes a movable body 104 having an aluminum lid 101, a movable body case 102, and a spring 103;
5 is provided. This cooker temperature sensor is
The movable body 102 has a thermistor element 106 as a normal temperature detecting temperature sensing element and a temperature fuse 107 as an abnormally high temperature detecting temperature sensing element. The connecting wires 108 and 109 are used for the thermistor element 106 and the thermal fuse 107, respectively.
11 are connected.

The movable case 102 and the holder 105 are
For example, it is made of heat-resistant resin. As shown in FIG. 1B, a wall 112 for insulating between the thermistor element 106 and the thermal fuse 107 is formed inside the movable body case 102. Walls 113 and 114 are formed inside the movable body case 102 to insulate between the leads of the thermistor element 106 and between the leads of the thermal fuse 107, respectively. The movable body case 102 has a slit 115
However, ribs 116 corresponding to the slits 115 are formed in the holder 105, respectively. As described above, in the present embodiment, the rotation of the movable body case 102 with respect to the holder 105 is prevented by the slit 115 and the rib 116, and the walls 112, 113, and 1 for the purpose of insulation are provided.
Since 14 is formed, the positions of the thermistor element 106 and the thermal fuse 107 with respect to the object to be heated are specified.

The cooker temperature sensor 100 is assembled as follows.

First, the leads of the thermistor element 106 are
A connecting member 108 is used to connect to a lead wire 110 passing through the movable body case 102. Then, a bend 117 is formed in the lead of the thermistor element 106 and housed in the movable case 102. Next, an adhesive is injected from a window 118 formed in the movable body case 102 to fix the connection member 108 to the movable body case 102.

Similarly, for the thermal fuse 107,
The lead is connected to a lead wire 111 passing through the movable body case 102 by using a connection member 109, and is housed in the movable body case 102.

As described above, the walls 112, 113, and 114 are formed in the movable body case 102, so that the thermistor element 106 and the thermal fuse 107 are insulated from each other. The leads of the thermal fuse 107 are also insulated from each other.

Next, above the thermistor element 106 and the thermal fuse 107 housed in the movable body case 102,
A high thermal conductor (not shown) such as silicone grease is applied. With this high thermal conductor, heat conduction between the aluminum lid 101 and the thermistor element 106 and the thermal fuse 107 can be improved. Further, regarding the thermal fuse 107, since the lead is located at the upper part,
In order to secure the insulation, an insulating sheet 119 is mounted between the lead (high heat conductor) and the aluminum lid 101.

After completing the above steps, the aluminum lid 101
Is mounted on the movable body case 102. Furthermore, lead wire 1
10 and 111 are passed through the spring 103 and the holder 105, and the movable body case 102 is held by the holder 105 via the spring 103. At this time, the rib 116 of the holder 105 is located in the slit 115 of the movable case 102. Slit 115 and rib 1
16, the holder 10 of the movable case 102
Rotation with respect to 5 is prevented.

The cooker temperature sensor 100 manufactured as described above is, as shown in FIG.
Attached to the side wall of the outer pan 201. When the inner pan 202 is set in the rice cooker 200, the outer surface thereof contacts the aluminum lid 101 of the cooker temperature sensor 100.
Then, the movable body 104 of the cooking temperature sensor 100 is pushed by the inner pan 202 and moves to the holder 105 side. As a result, the movable body 104 is urged toward the inner pot 202 by the action of the spring 103.

The temperature of the inner pan 202 is detected by the thermistor element 106 via the aluminum lid 101 and the high thermal conductor. The detection result is used for rice cooking control by the control circuit of the rice cooking jar. The abnormally high temperature of the inner pan 202 is detected by the thermal fuse 107 via the aluminum lid 101, the insulating sheet 119, and the high thermal conductor. The blowing of the thermal fuse 107 serves to stop the heating of the inner pot, thereby preventing an accident.

[0028]

According to the present invention, the provision of a plurality of types of temperature sensors for the cooker temperature sensor can reduce the number of components and the number of assembling steps of the cooker, thereby realizing cost reduction.

Further, according to the present invention, the temperature fuse for the cooker is provided with a built-in temperature fuse, so that the abnormal temperature of the object to be heated can be detected more quickly than before.

Further, according to the present invention, an insulating wall is formed in the moving body case of the temperature sensor for a cooking appliance, a slit is formed, and a rib is formed in the holder, so that the moving case rotates with respect to the slit. Can be prevented,
The positions of the plurality of types of temperature sensors with respect to the object to be heated can be specified. As a result, it is possible to reduce variations in characteristics of each product, and thus variations in rice cooking performance, and variations in blowing of the thermal fuse.

[Brief description of the drawings]

FIG. 1 is an assembly structure diagram showing one embodiment of the present invention.

FIG. 2 is a perspective view showing a rice cooker provided with the temperature sensor for the cooker of FIG. 1;

FIG. 3 is a perspective view showing a rice cooker provided with a conventional cooker temperature sensor.

4 is an assembly structural view showing details of the cooker temperature sensor of FIG. 3;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Temperature sensor for cooker 101 Aluminum lid 102 Movable body case 103 Spring 104 Movable body 105 Holder 106 Thermistor element 107 Thermal fuse 108, 109 Connecting member 110, 111 Lead wire 112 Wall 113, 114 Wall 115 Slit 116 Rib 117 Bend 118 Window 119 Insulation Sheet 200 rice cooker 201 outer pan 202 inner pan 301 rice cooker main body 302 outer pan 303 inner pan 304 cooker temperature sensor 305 temperature fuse 401 holder 402 movable body 403 movable body case 404 aluminum lid 405 thermistor element 406 lead wire 407 connecting member 408 resin 409 Spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-275123 (JP, A) JP-A-6-241909 (JP, A) JP-A-7-43218 (JP, A) 62925 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/00 103 A47J 27/00 109 F24C 3/12

Claims (3)

(57) [Claims] 1. A temperature sensor for a cooker which detects a temperature of a heated body by contacting the heated body when the removable heated body is mounted on the heated body, wherein the thermistor element is used as a temperature-sensitive element. And thermal fuse
Rutotomoni, wherein comprising a Arumifuta in contact with the heated body, a case where the Arumifuta is fitted with housing the temperature sensing element, and a holder for movably holding the casing in one direction, the temperature fuse Wherein the lead is bent so that one of the two leads is disposed close to the aluminum lid, and a high thermal conductor is disposed between the lead and the aluminum lid. 2. A thermistor element as a temperature-sensitive element in a cooker temperature sensor for detecting the temperature of a heated body when the removable heated body is attached to the heated body. And thermal fuse
Rutotomoni, wherein comprising a Arumifuta in contact with the heated body, a case where the Arumifuta is fitted with housing the temperature sensing element, and a holder for movably holding the casing in one direction, said casing An insulating wall for partitioning between the thermistor element and the thermal fuse, and between the two leads of the thermistor element and the thermal fuse.
Provide an insulating wall that separates the book leads ,
In the case, a window is provided at a position corresponding to the vicinity of the tip of the lead of the thermistor element, and an adhesive is injected from the window to fix a connection point between the lead and a lead for external drawing to the case. A temperature sensor for a cooking appliance characterized by being made possible. Wherein slits are formed in said case, said holder rib corresponding to the slit is formed, the cooker of claim 1 or 2, characterized in that rotation of the casing relative to the holder is prevented Temperature sensor.