JPH08136359A - Temperature sensor - Google Patents

Abstract

PURPOSE: To make a temperature sensor difficult to touch cooking juice on the outer surface and to make it contact correctly to a cooking vessel in a temperature sensor detecting the temperature of a cooking vessel. CONSTITUTION: A temperature sensor 15 having a thermistor as a temperature- sensing element is set at the inner surface of a top plate 21 of an outer cylinder 16. The outer cylinder 16 is supported by a spring on a washer of an inner cylinder 17 so that the outer cylinder 16 can freely move up and down and oscillate. A top face-coating layer 35, outer face-coating layers 36, 37 and an inner face-coating layer formed of fluororesin the provided at the outer surface of the outer cylinder 16. The inner cylinder 17 is equipped with outer face- coating layers 41, 42 and 43. The coating layers 35, 36, 37 of the outer cylinder 16 and coating layers 42, 43 of the inner cylinder 17 make it hard for broth to stick to the temperature sensor. Moreover, the outer cylinder 16 can move up and down and oscillate with little friction and resistance because of the favorable slipperiness of the top face-coating layer 35 and coating layers 38, 40, 39, 41 of a sliding part. A top face 21, is accordingly properly brought in touch with a cooking vessel.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a temperature sensor used to detect the temperature of a cooking vessel.

[0002]

2. Description of the Related Art A temperature sensor for detecting the temperature of a cooking container is often solidified or burned by simmered syrup overflowing from the cooking container, which causes poor heat conduction and inaccurate temperature detection. In addition, the movement of the movable part of the temperature sensor may be hindered. As a means for avoiding such inconvenience, a cylindrical cover surrounding the temperature sensor is provided, which is movable up and down and abuts against the bottom surface of the cooking container by being elastically blasted upward and contacting the bottom surface of the cooking container. It is conventionally known that the temperature sensor is prevented from reaching the temperature sensor by flowing down the cover (for example, Jitsuko Sho 5).
8-36344, Jikken 3-7718).

According to the above-mentioned known technique, the adherence of the broth to the temperature sensor is prevented, but the broth adheres to the cover to cause solidification and seizure, which is unsightly, and the structure is complicated and expensive. .

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent the temperature sensor from being damaged by boiling water even if the cover is omitted.

[0005]

The first means for solving the above-mentioned problems is, as described in claim 1, that an outer cylinder having a heat-sensitive element attached to the inner surface of the top plate is slidably fitted to the inner cylinder. In the temperature sensor in which the top surface of the top plate is brought into contact with the cooking container by applying an elastic force by a spring in the direction of pushing out the outer cylinder, the top surface of the top plate of the outer cylinder is made of fluorine resin. A coating layer is provided.

According to a second aspect of the present invention, the second means slidably fits the outer cylinder having the heat-sensitive element attached to the inner surface of the top plate to the inner cylinder, and the spring for pushing the outer cylinder. In the temperature sensor in which the top surface of the top plate is brought into contact with the cooking container by applying the elastic force of the above, a coating layer of fluororesin is provided on the outer peripheral surface of the outer cylinder.

As a third means, as described in claim 3, an outer cylinder having a heat-sensitive element attached to the inner surface of the top plate is slidably fitted to the inner cylinder, and a spring for pushing the outer cylinder is used. In a temperature sensor in which the top surface of the top plate is brought into contact with the cooking container by applying elastic force, a coating layer of fluororesin is provided on the outer peripheral surface of the inner cylinder exposed from the outer cylinder. .

As a fourth means, as described in claim 4, an outer cylinder having a heat-sensitive element attached to the inner surface of the top plate is slidably fitted to the inner cylinder, and a spring for pushing the outer cylinder is used. A temperature sensor in which an elastic force is applied to bring the top surface of the top plate into contact with the cooking container, wherein a coating layer of a fluororesin is provided on at least one of the sliding surfaces of the outer cylinder and the inner cylinder. And

[0009]

[Function] The coating layer of the fluororesin has water repellency, so that the broth is unlikely to adhere to it, and even if it adheres, the adhered matter can be easily peeled off, and the frictional resistance when sliding against another matter Few. The invention of each claim makes appropriate use of these properties.

According to the first aspect of the present invention, the broth that is about to flow between the bottom of the cooking container and the top surface of the outer cylinder is prevented from entering due to the water repellency of the coating layer, and temporarily enters and adheres. However, it can be easily removed. In addition, the coating layer has less friction with the bottom of the cooking container, so even if the cooking container is not slid down directly above the temperature sensor or is slanted laterally, the temperature sensor is hard to tilt and does not touch the bottom of the cooking container. Make proper contact.

According to the second aspect of the invention, the broth flowing down the outer peripheral surface of the outer cylinder flows with a small amount of adhesion due to the water repellency of the coating layer and drops from the lower end of the outer cylinder.

According to the third aspect of the invention, the broth flowing down the outer peripheral surface of the inner cylinder flows with a small amount of adhesion due to the water repellency of the coating layer and drops from the lower end of the inner cylinder.

According to the means of claim 4, since the frictional resistance between the sliding surfaces of the outer cylinder and the inner cylinder is small, the outer cylinder slides smoothly with respect to the inner cylinder, and the top surface is on the bottom of the cooking container. Abut correctly. Even if the broth may flow into the sliding surface of the outer cylinder and the inner cylinder, the water repellency prevents the adhesion.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a gas stove using the temperature sensor of the present invention, 2 is a frame of the gas stove 1, 3 is a top plate provided on the top surface of the frame 2, and 4 is the top plate 3. The soup saucer 5 held by the above, 5 is a virtue, and 6 is a gas burner, which are installed in the openings of the top plate 1 and the soup saucer 4.

The burner body 7 of the gas burner 6 is provided with a ring-shaped gas distribution chamber 8 having an open upper surface, a burner head 9 is placed so as to cover the gas distribution chamber 8, and an outer peripheral wall of the distribution chamber 8 is placed. By the side tapered surface and the groove on the outer peripheral side of the burner head 9, large and small flame ports 10 and 11 are formed. Further, on the upper surface of the burner head 9, a heat shield tube 13 is provided with a gap 13 ₁
Are connected to each other by the pillars 14 and the flame sensor 1 is connected to the temperature sensor 15.
It prevents the heat of flame from 0 and 11 from being directly transmitted.

The temperature sensor 15 includes an outer cylinder 16 and an inner cylinder 17, the inner cylinder 17 is fixed to the frame body 2 via a bracket 18, and the outer cylinder 16 has an inner cylinder 17 and a spring 32 shown in FIG. Although it is supported through and normally protrudes to the position of the line L ₁ , when a cooking container 19 such as a pot or a pot is placed on the Gotoku 5, the weight of the cooking container 19 presses the spring 32 to compress the Gotoku. 5 down to line L _{2 at} the top. In the figure, reference numerals 35 to 43 are fluororesin coating layers described later.

The temperature sensor 15 is shown in detail in FIGS. 2 to 4, and the outer cylinder 16 is composed of a stepped cylinder 20 having a step portion 20 ₁ and a small diameter portion 20 ₂ and a top plate 21, and an inner surface of the top plate 21. , A thermistor 22 as a heat-sensitive element is attached via a fixing plate 23, and the top surface 21 ₁ of the top plate 21 is attached to the thermistor 2
Acts as a heat collecting plate for 2. And the top plate 21 is
The upper ends of the small holes 24 and the recesses 25 provided in the stepped cylinder 20,
It is engaged with the stepped cylinder 20 by the engagement between the inwardly directed projections 26, 27 provided on the peripheral edge 21 ₂ of the top plate 21.

The lead wire 28 for transmitting the signal of the thermistor 22 is taken out through the protective tube 29 and the inner cylinder 17 and connected to the gas control device.

The inner cylinder 17 is composed of a dish-shaped washer 30 and a support cylinder 31 joined to the washer 30 by a caulking portion 31 _1.
The lower end of 1 is connected to the bracket 18. Then, a spring 32 is interposed between the washer 30 and the top plate 21 of the outer cylinder 16 in a compressed state, and the stepped portion 20 ₁ is repelled to a position where it contacts the lower surface of the washer 30. In this state, the top surface 21 ₁ projects to the position of L ₁ .

Further, the recess 25 is formed on the cylinder portion of the washer 30.
A recessed line 33 that engages with is provided to prevent the outer cylinder 16 from rotating. However, there is a slight gap between the outer cylinder 16 and the inner cylinder 17, which allows the outer cylinder 16 to swing as well as move vertically.

Then, on the surface of the temperature sensor 15,
In order to prevent the inconvenience caused by the boiling liquid flowing down from the cooking container 19, a thin coating layer of fluororesin (tetrafluoroethylene resin) is provided. As shown in FIG. 4, the place where the coating layer is provided is a place where the broth easily flows and a sliding part,
The top surface coating layer 3 is formed on the top surface 21 ₁ of the top plate 21 through which the broth flows easily.
5. A step coating layer 36 and a lower end coating layer 37 are provided on the outer peripheral surface of the stepped cylinder 20. The top coating layer 35 is the top plate 2
It is preferable to extend to the first peripheral edge 21 _2, the peripheral edge 21 ₂
A top plate peripheral edge covering layer 35 ₁ is continuously provided on the above. Further, on the outer peripheral surface of the support cylinder 31 of the inner cylinder 17, the support cylinder upper coating layer 42
And a support cylinder lower covering layer 43.

As the sliding portion, inner surface coating layers 38 and 39 are provided on the outer cylinder 16 side in a portion sliding on the washer 30 and on the lower end surrounding the support cylinder 31, and on the inner cylinder 17 side. The outer surface coating layer 4 is provided on the portion facing the outer periphery of the washer 30 and the lower end of the outer cylinder.
0, 41 are provided.

However, one of the inner surface coating layer 38 and the outer surface coating layer 40 and one of the inner surface coating layer 39 and the outer surface coating layer 41 provided on the same sliding portion can be omitted, and even if they are omitted, the slidability is ensured. You can

Since the coating layer is provided as described above, even if the boiling water flowing down from the cooking container 19 tries to enter between the bottom 19 ₁ of the cooking container 19 and the top surface 21 ₁ of the outer cylinder 16, the top of the fluororesin is The water repellency of the surface coating layer 35 makes it difficult to penetrate,
It flows along the outer peripheral surface of the outer cylinder and the outer peripheral surface step coating layer 36 and drops from the corner. Further, even if a part of the broth reaches the small-diameter portion 20 ₂ from the surface of the outer peripheral surface step coating layer 36, it drops from the lower end of the outer peripheral surface lower end coating layer 37.
5 is less likely to get dirty, and it is possible to prevent simmered juice from being transferred to the sliding portions of the outer cylinder 16 and the inner cylinder 17 to be fixed, and a sliding failure due to this. It should be noted that the invasion preventing action that occurs between the top surface coating layer 35 and the bottom 19 ₁ differs depending on the material of the cooking container 19 and
_{When 1} is a metal, it occurs remarkably, but when it is enamel or glass, it hardly occurs.

Then, each coating layer 35-37, 42, 43
Boiled water hardly adheres to the surface of the product due to its water repellency, and even if it adheres, it can be easily wiped off, and even if it becomes solidified or burned, it can be easily removed and kept clean. You can Especially top plate 21 on the top surface 21 ₁ is solidified and baked inherent in broth to adhesion of the heat conduction is inhibited thermometry of the thermistor 22 becomes inaccurate, since its adhesion is prevented, always accurate thermometry is Can be expected.

Further, as shown in FIG. 5, when the cooking container 19 is placed on the Gotoku 5 while being displaced in the direction of the arrow A ₁ , the outer cylinder 16 is moved by the friction between the bottom 19 ₁ and the top surface 21 ₁ of the container 19. When the gap S is inclined and the gap between the bottom 19 ₁ and the bottom 19 ₁ is one-sided, the gap S is easily formed, and when the gap S is formed, the thermistor 22
As a result, the heat transfer property to is lowered and accurate temperature detection cannot be performed. However, since the top surface 21 ₁ is provided with the fluororesin layer 35, it slides well with the bottom 19 ₁ of the cooking container 19, and even if the cooking container 19 is displaced, the outer cylinder 20 is unlikely to tilt and the gap S is unlikely to occur.

The bottom 19 ₁ of the cooking container 19 is a top plate 21.
If the cooking container 19 is pressed against the temperature sensor 15 from diagonally above in the state of hitting the corner portion of the
The top plate peripheral edge covering layer 35 ₁ causes slippage, and the inclination of the outer cylinder is immediately recovered or prevented.

Next, the support cylinder upper coating layer 42 and the support cylinder lower end coating layer 43 formed on the outer peripheral surface of the support cylinder 31 exposed from the outer cylinder 16 will be described. When the broth flows down to the upper coating layer 42 of the support cylinder 31 or the vicinity thereof, the surface area of the support cylinder 21 is smaller than the outer cylinder 16 and is likely to be accumulated thickly, and the height is also increased to reach the lower end of the outer cylinder 16. Although the movement is likely to be hindered, the coating layer 42 can reduce the attachment of broth.

Further, the lower end coating layer 43 is easy to drip even if the broth flows down to this point, and it wraps around from the lower end of the support cylinder 31 to the inside thereof to accumulate and solidify around the lead wire 28. It is possible to prevent a phenomenon that hinders the vertical movement of the outer cylinder 16 from occurring through the line 28.

If the lower end coating layer 43 is provided on a flange 31 ₁ as shown in the figure, the dropping action is improved. If it is provided over the inner surface of the support cylinder 31, the lead wire is attached to the lower end of the support cylinder 31. It is possible to prevent 28 from contacting and damaging the insulating coating.

Next, the inner surface coating 38 of the outer cylinder 16 and the inner cylinder 17
Since it has good slipperiness even with the outer surface coating 40 of the outer cylinder 16
The upper and lower parts of the outer cylinder 1 are easily moved up and down, and the inner jacket 39 and the outer jacket 41 at the lower part are slid well, so that even if the outer cylinder 16 is inclined and the two jackets 39, 41 come into contact with each other, the outer cylinder 1
The vertical movement of 6 can be performed without any problems. As described above, one of the coatings 38 and 40 and one of the coatings 39 and 40 can be omitted.

Further, the coating layer of each portion of the outer cylinder 16 or the inner cylinder 17 can be a continuous coating layer.

By adding color, pattern, etc. to the fluororesin layer, attention can be paid to the temperature sensor,
If the lead wire 28 is coiled under the protective tube 29 or the like, even if the lead wire 28 is fixed to the support cylinder 31, it is possible to prevent tension from occurring when the outer cylinder 16 is moved up and down.

[0034]

As is apparent from the above description, the present invention has the following effects.

According to the first aspect of the invention, the coating layer of the fluororesin on the top surface of the temperature sensor top plate prevents the boiling water from adhering to the top surface and can be easily peeled off even if it is attached. Therefore, accurate temperature measurement is possible. Further, even if the cooking container is laterally displaced and the outer cylinder of the temperature sensor is inclined due to friction with the bottom surface of the cooking container, the inclination is prevented by the low friction property of the fluororesin layer, and contact between the cooking container and the top surface is prevented. It has an advantage that it can be kept well and accurate temperature measurement can be performed.

According to the second aspect of the present invention, the outer coating layer of the fluororesin improves the prevention of the attachment of broth to the outer peripheral surface of the outer casing of the temperature sensor and the detachability of the deposited material, thus facilitating cleaning. Have advantages.

Further, according to the means of claim 3, even when the boiling water flows down to the outer peripheral surface of the inner cylinder exposed from the outer cylinder, the water repellency and peeling property of the fluororesin coating layer prevent the accumulation of deposits. Therefore, it is possible to obtain an effect that does not hinder the lifting and lowering of the outer cylinder.

According to the means of claim 4, the outer cylinder and the inner cylinder of the temperature sensor can be smoothly slid by the coating layer of the fluororesin, so that the outer cylinder can be properly held.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a gas stove using a temperature sensor of the present invention.

FIG. 2 is a vertical sectional view of the temperature sensor.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is an exploded perspective view of an outer cylinder and an inner cylinder.

FIG. 5 is an explanatory diagram of the operation.

[Explanation of symbols]

1 gas stove 6
Burner 15 Temperature sensor 1
6 Outer cylinder 17 Inner cylinder 2
1 Top plate 21 ₁ Top surface 2
1 ₂ Edge 22 Thermistor (heat sensitive element) 3
2 spring 35 top surface coating layer 36, 37, 40, 41, 42, 43 outer surface coating layer 38, 39 inner surface coating layer

Claims (4)

[Claims] 1. An outer cylinder having a heat-sensitive element mounted on the inner surface of the top plate is slidably fitted to the inner cylinder, and an elastic force of a spring in the direction of pushing the outer cylinder is applied to the top surface of the top plate. A temperature sensor adapted to be brought into contact with a cooking container, wherein a coating layer of fluororesin is provided on the top surface of the top plate. 2. An outer cylinder having a heat-sensitive element attached to the inner surface of the top plate is slidably fitted to the inner cylinder, and an elastic force is exerted by a spring in a direction of pushing out the outer cylinder so that the top surface of the top plate. A temperature sensor adapted to be brought into contact with a cooking container, wherein a coating layer of fluororesin is provided on the outer peripheral surface of the outer cylinder. 3. An outer cylinder having a heat-sensitive element attached to the inner surface of the top plate is slidably fitted to the inner cylinder, and an elastic force of a spring in the direction of pushing out the outer cylinder is applied to the top surface of the top plate. A temperature sensor adapted to be brought into contact with a cooking container, wherein a coating layer of fluororesin is provided on the outer peripheral surface of the inner cylinder exposed from the outer cylinder. 4. An outer cylinder having a heat-sensitive element attached to the inner surface of the top plate is slidably fitted to the inner cylinder, and an elastic force of a spring in the direction of pushing the outer cylinder is applied to act on the top surface of the top plate. A temperature sensor adapted to be brought into contact with a cooking container, wherein a coating layer of fluororesin is provided on at least one of the sliding surfaces of the outer cylinder and the inner cylinder.