JP2016008727A - Temperature detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature detection device in which a thermal head does not adhere to a support pipe even by long-term use.SOLUTION: At a support pipe erected at a center of a cooking stove burner, a thermal head is fitted in, and at the thermal head, a boil-over liquid cover for preventing a boil-over liquid from dropping on a lower end of the thermal head is provided, and furthermore, at a location lower than the boil-over liquid cover, a lamp black cover for blocking a flow of the lamp black rising along the support pipe is provided. When fine particles by the lamp black adhere to a rear surface side of the boil-over liquid cover, the boil-over liquid spreads along that portion, and a portion in which the boil-over liquid is solidified spreads. However, when the lamp black cover is provided, the fine particles can be prevented from adhering to the rear surface side of the boil-over liquid cover, and the boil-over liquid going along and solidifying can be eliminated. Thus, it becomes possible to avoid the thermal head adhering to the support pipe.

Description

  The present invention relates to a temperature detection device that comes into contact with the bottom of a cooking vessel placed on the virtues of a gas stove and detects the temperature of the cooking vessel.

  2. Description of the Related Art A temperature detection device that projects from the center of a stove burner and detects the temperature of a cooking container that is cooked by the stove burner is widely known. This temperature detection device includes a support pipe standing at the center opening of the stove burner, and a substantially cylindrical thermal head provided so as to be movable in the vertical direction with respect to the support pipe. The thermal head is biased upward by a coil spring, and a temperature sensor is incorporated in the thermal head. And when a cooking container is mounted on the five virtue of a stove burner, a thermal head will be pushed down by the bottom part of a cooking container, and the upper end surface of a thermal head will be in the state contact | abutted to the bottom part of the cooking container. As a result, the temperature of the cooking container can be detected by the temperature sensor built in the thermal head.

  Here, simmering may occur from the cooking container during cooking. If boiled juice enters the gap between the lower end of the thermal head and the support pipe, the thermal head is fixed to the support pipe, and the thermal head cannot be biased upward. Then, even if the cooking container is placed on Gotoku, the upper end surface of the thermal head cannot be brought into contact with the bottom of the cooking container, and the temperature of the cooking container cannot be detected.

  Therefore, by attaching a conical cylindrical member (boiled juice cover) that extends downward to the thermal head so as to cover the lower end portion of the thermal head, even if simmering occurs, the thermal head and the support pipe A temperature detection device has been proposed in which boiled juice does not enter the gap (Patent Document 1).

JP2013-044468A

  However, in the proposed temperature detecting device, the bottom portion of the thermal head is covered with the boiled juice cover so that the boiled juice does not enter the gap between the thermal head and the support pipe. However, there is a problem that the thermal head sticks to the support pipe after a long period of use, making it difficult to detect the temperature of the cooking container.

  The present invention has been made in response to the above-mentioned problems of the prior art, and the thermal head does not stick to the support pipe even after long-term use, and the temperature of the cooking container can be detected. An object is to provide a simple temperature detection device.

In order to solve the above-described problems, the temperature detection device of the present invention employs the following configuration. That is,
In the temperature detection device that is provided in the center of the stove burner and detects the temperature of the cooking container placed on Gotoku,
A support pipe erected in the center of the stove burner;
A holder fitted in the support pipe in a vertically movable manner;
A heat collecting plate attached to the upper end of the holder;
A temperature sensor attached to the lower surface of the heat collecting plate;
A coil spring for urging the holder upward,
The holder is provided with a boiled juice cover that prevents the boiled juice from the cooking container from being applied to the lower end of the holder,
An oil smoke cover for blocking the flow of oil smoke rising along the support pipe is provided at a position below the boiled juice cover.

  In such a temperature detection device of the present invention, the holder is fitted into the support pipe in such a manner that the holder can move in the vertical direction, and the holder has a boiled juice cover that prevents the boiled juice from being applied to the lower end of the holder. It is attached. Further, an oil smoke cover for blocking the flow of oil smoke rising along the support pipe is provided at a position below the boiled soup cover.

  As will be described in detail later, it is considered that the reason why the holder and the support pipe cannot be prevented from sticking simply by preventing the boiled juice from being covered with the boiled juice cover is as follows. First, when simmering occurs, the simmering juice that flows down below the stove burner is heated to generate oily smoke. The generated oil smoke rises along the support pipe, but when the oil smoke reaches the boiled juice cover, the fine particles forming the oil smoke adhere to the back side of the boiled juice cover. In this way, the boiled juice tends to spread in the part where the fine particles of oil smoke are adhered. For this reason, every time the simmered juice is applied to the boiled soup cover, the boiled soup spreads little by little along the part where the fine particles have adhered, and along with this, a part of the boiled simmered solidified also slightly It spreads one by one. As a result, it eventually reaches the gap between the lower end of the holder and the support pipe, and the holder and the support pipe are fixed.

  On the other hand, in the temperature detection apparatus of this invention, the oil smoke cover which interrupts | blocks the flow of oil smoke is provided in the position below the boiling juice cover. For this reason, in the portion where the oil smoke is blocked by the oil smoke cover, the fine particles of the oil smoke do not adhere to the boiled juice cover, and the boiled juice does not spread. As a result, even when used for a long time, the temperature of the cooking container can be detected without the holder sticking to the support pipe.

  Moreover, in the temperature detection apparatus of this invention mentioned above, it is good also as providing the oil smoke cover formed in the diameter smaller than the boiling juice cover in the position above the lower end of a holder.

  In this case, the oil smoke cover can be provided at a position close to the boiled juice cover, so that it is possible to more reliably prevent oil smoke particles from adhering to the boiled juice cover. Further, since the oil smoke cover is formed to have a smaller diameter than the boiled soup cover, the boiled soup that has flowed down the top surface of the boiled soup cover does not adhere to the oil smoke cover. For this reason, there is no possibility that the boiled juice is applied to the oil smoke cover, and the boiled juice adhering to the oil smoke cover spreads and solidifies on the lower surface side of the oil smoke cover, thereby fixing the holder to the support pipe.

  Moreover, in the temperature detection apparatus of this invention mentioned above, you may integrally form a boiling juice cover and an oil smoke cover through a cylindrical member. And it is good also as attaching a simmered juice cover and an oil smoke cover to a holder for every cylindrical member.

  If it carries out like this, a boiled soup cover and an oil smoke cover can be attached only by attaching a cylindrical member to a holder. For this reason, the number of parts does not increase with respect to a conventional temperature detection device having a boiled soup cover but no oil smoke cover, and can be manufactured with the same degree of simplicity.

It is sectional drawing which shows the structure of the gas stove 1 carrying the temperature detection apparatus 100 of a present Example. It is sectional drawing which shows the internal structure of the thermal head 110 of a present Example. It is explanatory drawing which illustrated the conventional thermal head 210 which is not provided with the oil smoke cover 115b. It is explanatory drawing which showed the reason for the conventional thermal head 210 adhering to the support pipe 120 by long-term use. It is explanatory drawing which showed the reason the thermal head 110 does not adhere to the support pipe 120 in the temperature detection apparatus 100 of a present Example. It is explanatory drawing which illustrated the thermal head 110 of the temperature detection apparatus 100 of various modifications.

  FIG. 1 is a cross-sectional view showing the structure of a gas stove 1 equipped with a temperature detection device 100 of the present embodiment. The gas stove 1 is provided by covering the top surface of the stove body (not shown) and having the burner opening 4 formed thereon, and facing the burner opening 4 to burn the fuel gas and cooking. A stove burner 10 for heating the container, Gotoku 3 in which a cooking container such as a pan is placed, a temperature detection device 100 for detecting the temperature of the cooking container placed on Gotoku 3 and the like are provided.

  The stove burner 10 includes a burner body 11 formed in an annular shape, a mixing tube 12 extending from the burner body 11, and an annular burner head 13 placed on the upper surface of the burner body 11. ing. The burner head 13 is made of die-cast aluminum or the like, and a plurality of grooves (flame grooves) are formed on the lower surface side of the outer peripheral portion. When the burner head 13 is placed on the burner body 11, a plurality of flame openings 13 a are formed between the plurality of flame opening grooves formed in the burner head 13 and the upper surface of the burner body 11. A burner cap 14 made of sheet metal is attached to the upper part of the burner body 11.

  When fuel gas is injected into the mixing tube 12 from the open end 12a of the mixing tube 12 extended from the burner body 11, a mixed gas of fuel gas and air is generated inside the mixing tube 12, and the burner The gas is supplied to the body 11 and the mixed gas flows out from the flame port 13a. The combustion of the stove burner 10 can be started by igniting the mixed gas with the spark plug 15. Secondary air is required for the combustion of the mixed gas, but about half of the secondary air passes through the opening 10a formed in the center of the stove burner 10 and from the gap between the burner head 13 and the burner cap 14. Supplied. For this reason, the upward strong flow by secondary air is formed in the opening part 10a in which the stove burner 10 is burning.

  Further, a support pipe 120 is erected on the inner side of the opening 10 a, and a substantially cylindrical thermal head 110 is slidably attached to the upper end of the support pipe 120 with respect to the support pipe 120. The temperature detecting device 100 of this embodiment is formed by the thermal head 110 and the support pipe 120. As will be described in detail later, the thermal head 110 has a built-in temperature sensor and a coil spring. As a result of the coil spring urging the thermal head 110 upward, when a cooking container is not placed on the Gotoku 3, The upper end of the thermal head 110 protrudes from the upper surface of Gotoku 3 (the surface on which the cooking container is placed). When the cooking container is placed on Gotoku 3, the thermal head 110 is pushed down at the bottom of the cooking container, and the upper end surface of the thermal head 110 comes into contact with the bottom of the cooking container by the force of the coil spring. For this reason, it becomes possible to detect the temperature of the bottom part of a cooking container with the temperature sensor incorporated in the thermal head 110. FIG.

  FIG. 2 is a cross-sectional view showing the internal structure of the thermal head 110 of this embodiment. The thermal head 110 includes a substantially cylindrical holder 111 made of sheet metal, a metal heat collecting plate 112 attached so as to close the upper end of the holder 111, and a temperature attached to the lower surface of the heat collecting plate 112. A sensor 113 and a coil spring 114 that urges the holder 111 upward together with the heat collecting plate 112 are provided. In this embodiment, the upper end of the holder 111 is processed into a flange shape to form a flange portion 111a. The heat collecting plate 112 is crimped to the flange portion 111a, but brazing (or welding). For example, the heat collecting plate 112 may be attached to the holder 111.

  The support pipe 120 to which the thermal head 110 is attached has an upper end formed in a flange shape, and a portion formed in the flange shape is inserted inside the holder 111. For this reason, the holder 111 is movable in the axial direction with respect to the support pipe 120. In addition, the lower end side of the holder 111 is reduced in diameter over a predetermined length, and a fitting portion 110 a is provided between the inner peripheral surface of the reduced diameter portion of the holder 111 and the outer peripheral surface of the support pipe 120. Is formed. For this reason, even if the holder 111 moves in a state in which the enlarged diameter portion of the support pipe 120 is inserted into the holder 111, the support pipe 120 does not come off the support pipe 120. Further, the coil spring 114 is accommodated in the holder 111 in a slightly compressed state, and therefore, the thermal head 110 is always urged upward. In addition, two lead wires 116 are drawn out from the temperature sensor 113 and are connected to the outside through the inside of the support pipe 120 while being protected by a rigid heat-resistant tube 117 braided with glass fiber. .

  Furthermore, a cover member 115 is attached to the heat-sensitive head 110 of the present embodiment at a reduced diameter portion below the holder 111. The cover member 115 includes a cylindrical member 115c formed in a cylindrical shape, a boiled juice cover 115a formed by pressing the upper end portion of the cylindrical member 115c into a conical cylindrical shape that extends downward, and a cylindrical member 115c. And an oil smoke cover 115b formed by pressing the lower end portion into a flange shape. The outer diameter of the oil smoke cover 115b is formed smaller than the outer diameter of the boiled soup cover 115a. Further, the cover member 115 is attached to the holder 111 at a position where the oil smoke cover 115 b is above the lower end of the holder 111.

  Thus, since the temperature detection apparatus 100 of the present embodiment is provided with the oil smoke cover 115b at a position below the boiled soup cover 115a in addition to the boiled soup cover 115a, it is used over a long period of time. However, the thermal head 110 does not adhere to the support pipe 120. In the following, as a preparation for explaining the reason, the case of the conventional thermal head 210 not provided with the oil smoke cover 115b will be described.

  FIG. 3 is an explanatory view showing a rough shape of a conventional thermal head 210 having no oil smoke cover 115b. As shown in the figure, the conventional thermal head 210 has a boiled juice cover 215a attached to the lower part of the holder 111, but does not have the oil smoke cover 115b provided in the thermal head 110 of this embodiment.

  In such a conventional thermal head 210 as well, the boiled juice flows down over the boiled juice cover 215a as shown by the thick dashed arrow in FIG. It was considered that the boiled juice does not enter the gap between the heat-sensitive head 210 and the heat-sensitive head 210 does not stick. However, when used over a long period of time, as shown by the thick dashed arrow in FIG. 3 (b), the oil stain spreads so that the back side of the boiled juice cover 215a goes back from the lower end. Finally, the bottom of the holder 111 is reached and the thermal head 210 is fixed. The mechanism by which such a phenomenon occurs is considered as follows.

  FIG. 4 is an explanatory diagram showing the reason why oil dirt spreads on the back side of the boiled juice cover 215a in the conventional thermal head 210. FIG. In FIG. 4, the lower part of the holder 111 is shown enlarged. When boiling occurs, as shown in FIG. 4A, the boiling juice flows down the upper surface of the boiling juice cover 215a. The hatched portion in FIG. 4 (a) represents the boiled juice that flows down the top surface of the boiled juice cover 215a.

  The boiled simmered juice that has flowed down is stored in the lower part of the stove burner 10 (see FIG. 1), and then heated by the radiant heat from the flame of the stove burner 10 each time it is cooked. For this reason, in the long run, oily smoke is generated from the boiled soup and ascended along the support pipe 120 as shown by the dashed arrows in FIG. 4B, on the back side of the boiled soup cover 215a. Reach. As a result, oily fine particles forming oil smoke adhere to the back side of the boiled juice cover 215a. A small black circle displayed on the back side of the boiled juice cover 215a in FIG. 4 (b) represents a state in which fine particles due to oil smoke have adhered. From the relationship shown in FIG. 4, in FIG. 4, the size of the fine particles (black circles) is displayed larger than the actual size, and the density of the adhered particles is also lower than the actual density (as if they are loosely attached). It is.

  In this way, when simmering occurs with the oily fine particles attached to the back side of the boiled soup cover 215a, the boiled soup flows down the top surface of the boiled soup cover 215a and then boiled at the lower end of the boiled soup cover 215a. Drops of spilled juice adhere. In FIG. 4 (c), the drops of boiled soup adhering to the lower end of the boiled soup cover 215a are displayed with diagonal lines. Here, since the boiled juice contains an oil component, it has a high affinity with the oily fine particles adhering to the back side of the boiled juice cover 215a, and the back side of the boiled juice cover 215a is easily wetted by the boiled juice. It is in a state. In addition, the “state easily wetted by boiled soup” means that the boiled soup is on the surface of the object (here, the back side of the boiled soup cover 215a) rather than the boiled soup being spherical and having a small surface area. The thinner it is, the smaller the interface energy is. For this reason, the drops of boiled broth adhering to the lower end of the boiled broth cover 215a spread upwardly so as to go back to the back side of the boiled broth cover 215a.

  Further, as described above with reference to FIG. 1, a strong flow of secondary air is generated in the opening 10 a during combustion of the stove burner 10 from the lower side to the upper side. The white arrow shown in FIG.4 (c) represents such a flow of secondary air. For this reason, the boiled juice drops are pushed back by the flow of the secondary air, and then go back upward on the back side of the boiled juice cover 215a. Then, the boiled soup that has spread the back side of the boiled soup cover 215a is dried while receiving the influence of heat from the stove burner 10 and gradually solidifies.

  As a result of this being repeated every time boiled simmering occurs, the portion where boiled simmered solids spreads so that the back side of boiled simmered cover 215a is traced upward. The area indicated with fine diagonal lines in FIG. 4D represents a portion where the boiled juice is solidified. For this reason, if the stove burner 10 is used for a long period of time, the solidified portion reaches the lower end of the holder 111 and the thermal head 210 is fixed to the support pipe 120. On the other hand, since the thermal head 110 of the present embodiment includes the oil smoke cover 115b below the boiled juice cover 115a, the thermal head 110 is fixed to the support pipe 120 even when used for a long period of time. There is no.

  FIG. 5 is an explanatory diagram showing the reason why sticking does not occur in the thermal head 110 of the present embodiment including the oil smoke cover 115b. Also in FIG. 5, the lower part of the holder 111 is shown enlarged. In the thermal head 110 of the present embodiment, as in the conventional thermal head 210 described above with reference to FIG. 4, when boiling occurs, the boiling juice flows down on the upper surface of the boiling juice cover 115a (FIG. 5 ( a)). And the boiled simmered juice that has flowed down accumulates in the lower part of the stove burner 10 (see FIG. 1) and generates oil smoke.

  The generated oil smoke rises along the support pipe 120 as shown by the dashed arrow in FIG. 5B, but an oil smoke cover 115b is provided below the boiled juice cover 115a. For this reason, oily fine particles do not adhere to the front surface on the back side of the boiled juice cover 115a, and fine particles do not adhere to the portion blocked by the oil smoke cover 115b. Further, as described above, the boiled soup cover 115a is formed to have a larger diameter than the oil smoke cover 115b. Therefore, the back surface of the boiled soup cover 115a is formed on the radially outer portion not blocked by the oil smoke cover 115b. Fine particles adhere to the side. Of course, fine particles adhere to the entire bottom surface of the oil smoke cover 115b. In FIG. 5 as well, oily fine particles are represented by small black circles as in FIG. 4 described above.

  Subsequently, when boiling occurs, as shown by hatching in FIG. 5C, drops of boiling juice adhere to the lower end of the boiling juice cover 115a. And since the oily fine particles are attached to the radially outer portion of the back side of the boiled soup cover 115a, the drops of boiled soup spread back to the back side of the boiled soup cover 115a. . However, in the thermal head 110 of the present embodiment, the oily fine particles are attached to the back side of the boiled juice cover 115a only in the radially outer portion, and the oil smoke is blocked by the oil smoke cover 115b. No fine particles are attached to the radially inner part. For this reason, after boiled soup spreads to the part to which fine particles adhered, it does not spread further. The oil smoke cover 115b also blocks the flow of secondary air indicated by the white arrow in FIG. 5C, so that the boiled juice is pushed by the flow of secondary air and the boiled juice covers the boiled juice cover 115a. It never goes back on the back side. For this reason, in the thermal head 110 of the present embodiment, the boiled juice is solidified in the radially outer portion on the back surface side of the boiled juice cover 115a, but the solidified portion does not spread further. . In addition, the part which attached | subjected the fine oblique line to FIG.5 (d) represents the area | region where the boiled juice was solidified.

  Further, as shown in FIG. 5 (b), fine particles due to oil smoke adhere to the lower surface of the oil smoke cover 115b, but the boil formed above the oil smoke cover 115b has a larger diameter than the oil smoke cover 115b. A zero soup cover 115a is provided. Therefore, the boiled soup is not blocked by the boiled soup cover 115a and applied to the oil smoke cover 115b (see FIG. 5 (a)). Therefore, the boiled soup drops may adhere to the oil smoke cover 115b. Absent. For this reason, although fine particles due to oil smoke adhere to the lower surface side of the oil smoke cover 115b, the boiled juice does not spread and solidify there. As a result, the solidified portion of the boiled juice spreads from the oil smoke cover 115b, and the thermal head 110 does not adhere to the support pipe 120.

  Furthermore, in the thermal head 110 of this embodiment, the boiled juice cover 115a and the oil smoke cover 115b are integrally formed as the cover member 115, so that the boiled juice can be obtained simply by attaching the cover member 115 to the lower part of the holder 111. The cover 115a and the oil smoke cover 115b can be attached. Therefore, the manufacturing process is not complicated even for the conventional thermal head 210. Further, if the boiled soup cover 115a and the oil smoke cover 115b are integrally formed in this way, the positional relationship (distance and coaxiality) between the boiled soup cover 115a and the oil smoke cover 115b can be easily managed. In addition, manufacturing variations in the temperature detection device 100 can be suppressed.

  There are several modifications of the temperature detection apparatus 100 of the present embodiment described above. Hereinafter, these modified examples will be briefly described focusing on differences from the temperature detection device 100 of the present embodiment. FIG. 6 is an explanatory view collectively showing the thermal head 110 of the temperature detecting device 100 according to the modification. In the present embodiment described above, the oil smoke cover 115b has been described as being formed in a horizontal disk shape. However, as shown in FIG. 6 (a), the oil smoke cover 115b may also be formed in a conical cylinder shape extending downward, similar to the boiled juice cover 115a.

  In the above-described embodiment, the boiled juice cover 115a has been described as being formed in a conical cylinder shape that extends downward. However, as shown in FIG. 6B, the boiled juice cover 115a may also be formed in a horizontal disk shape, similar to the oil smoke cover 115b.

  Alternatively, in the present embodiment described above, it has been described that both the boiled juice cover 115 a and the oil smoke cover 115 b are attached to the holder 111. However, the oil smoke cover 115b only needs to be attached below the boiled juice cover 115a. Therefore, as shown by a thin broken line in FIG. 6 (c), the oil smoke cover 115b should be below the position where the holder 111 is pushed down. For example, the oil smoke cover 115 b may be attached to the support pipe 120.

  Alternatively, in the above-described embodiment, the oil smoke cover 115b has been described as having a smaller diameter than the boiled soup cover 115a. However, if the oil smoke cover 115b is attached to the support pipe 120, the oil smoke cover 115b may be formed with a larger diameter than the boiled juice cover 115a as shown in FIG. Of course, when the oil smoke cover 115b is formed to have a larger diameter than the boiled juice cover 115a, the boiled juice that has flowed down the top surface of the boiled juice cover 115a is applied to the oil smoke cover 115b and drops of the boiled juice are attached. As a result, the boiled juice spread through the oily fine particles adhering to the back side of the oil smoke cover 115b is solidified. However, since the lower end of the holder 111 is above the oil smoke cover 115b, the thermal head 110 does not adhere to the support pipe 120 even if the solidified portion expands on the lower surface side of the oil smoke cover 115b.

  The temperature detection device 100 according to the present embodiment and various modifications has been described above, but the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof. is there.

1 ... gas stove, 2 ... top plate, 3 ... virtues,
10 ... Stove burner, 10a ... Opening, 13 ... Burner head,
DESCRIPTION OF SYMBOLS 100 ... Temperature detection apparatus, 110 ... Thermal head, 111 ... Holder,
112 ... Heat collecting plate, 113 ... Temperature sensor, 114 ... Coil spring,
115 ... cover member, 115a ... boiled juice cover, 115b ... oil smoke cover,
116: Lead wire, 120: Support pipe.

Claims (3)

In the temperature detection device that is provided in the center of the stove burner and detects the temperature of the cooking container placed on Gotoku,
A support pipe erected in the center of the stove burner;
A holder fitted in the support pipe in a vertically movable manner;
A heat collecting plate attached to the upper end of the holder;
A temperature sensor attached to the lower surface of the heat collecting plate;
A coil spring for urging the holder upward,
The holder is provided with a boiled juice cover that prevents the boiled juice from the cooking container from being applied to the lower end of the holder,
An oil smoke cover for blocking the flow of oil smoke rising along the support pipe is provided at a position below the boiled soup cover. The temperature detection device according to claim 1,
The temperature detection device, wherein the oil smoke cover is smaller in diameter than the boiled juice cover and is provided at a position above the lower end of the holder. The temperature detection device according to claim 2,
The boiled juice cover is formed integrally with the cylindrical member at the upper end of the cylindrical member attached to the outside of the holder,
The oil smoke cover is formed integrally with the cylindrical member at a lower end of the cylindrical member.

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