JP6152525B2 - Temperature detection device - Google Patents

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 that is formed in a substantially cylindrical shape and is fitted into the support pipe in a manner in which the lower end side is movable in the vertical direction;
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;
A boiled soup cover that prevents the boiled soup from the cooking container from being applied to the lower end of the holder, and
The boiled soup cover has an umbrella part having a shape that expands downward, and the lower end of the umbrella part is attached to a position above the lower end of the holder ,
The umbrella part of the boiled soup cover is formed in a cylindrical shape and is expanded from the shaft part for attaching the boiled soup cover to the holder in an angle range of 15 degrees from the horizontal direction to the horizontal direction downward. It is characterized by being formed into a shape that expands downward at a larger angle .

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. This boiled soup cover has an umbrella part having a shape that expands downward, and is attached to a position where the lower end of the umbrella part is above the lower end of the holder. Furthermore, the shape of the umbrella part of the boiled soup cover is expanded from the cylindrical shaft portion for attaching the boiled soup cover to the holder in the horizontal direction or downward from the horizontal direction in an angle range of 15 degrees, and more It is formed in a shape that expands downward at a large angle.

In this way, even if boiled soup flows down under the stove burner and the smoke generated from the boiled boiled soup rises, the lower end of the umbrella is above the lower end of the holder, so the bottom end of the holder Oil smoke does not stay in the vicinity. For this reason, even when the stove burner is used for a long period of time, dirt due to oil smoke does not advance near the lower end of the holder, and it is possible to avoid the holder and the support pipe from sticking to each other. In addition, since the shape of the base portion connected to the shaft portion is such that the shape of the base portion connected to the shaft portion expands in the angle range of 15 degrees downward from the horizontal direction or the horizontal direction, The back part of the back side of the back is substantially narrowed and does not become a shape. For this reason, even if the oil smoke rises from below, the oil smoke is less likely to stay on the back side of the umbrella portion, so that the back side of the umbrella portion can be avoided from being contaminated with the oil smoke. Furthermore, since the base portion of the umbrella portion has a shape that expands downward at a larger angle after the base portion has been enlarged in the substantially horizontal direction, an increase in the outer diameter of the umbrella portion can be suppressed. For this reason, during the combustion of the stove burner, the flow of the secondary air rising along the support pipe is not obstructed.

  Moreover, in the temperature detection apparatus of this invention mentioned above, it is good also considering the shape of the umbrella part of a boiled juice cover as follows. That is, the lower end of the umbrella portion may be formed in a shape that falls in an angle range of 50 degrees to 70 degrees downward from the horizontal direction.

  If it carries out like this, since the lower end of an umbrella part becomes a slope with a steep downward slope, it can prevent that boiled juice adhering to a lower end spreads along the back side of an umbrella part. For this reason, even when used over a long period of time, it is possible to avoid a situation in which dirt due to boiled juice spreads behind the umbrella and reaches the lower end of the holder, causing the holder and the support pipe to be fixed. Become.

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 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 shows the reason for which the lower end of the umbrella part 115b of the boiled soup cover 115 is formed in the steep downward slope. 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, and a temperature detecting device 100 for detecting the presence or absence of the cooking container placed on Gotoku 3 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, during the combustion of the stove burner 10, the upward flow by secondary air is formed in the opening part 10a.

  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 sensor attached to the lower surface of the heat collecting plate 112. 113 and a coil spring 114 that urges the holder 111 upward together with the heat collecting plate 112. 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 biased 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 boiled juice cover 115 is attached to the heat-sensitive head 110 of the present embodiment at the reduced diameter portion at the bottom of the holder 111. The boiled soup cover 115 has a shape in which an umbrella portion 115b having a shape of increasing in diameter downward is attached to the upper end of a cylindrical shaft portion 115a. For this reason, even when boiling occurs during cooking, the boiling juice is blocked by the umbrella 115b, so that the lower end of the holder 111 is not covered with the boiling juice. In this embodiment, the umbrella portion 115b is attached to the upper end of the shaft portion 115a. However, the umbrella portion 115b may be attached to the lower end of the shaft portion 115a. In this case, since the boiled soup cover 115 becomes longer, the boiled soup cover 115 may be attached above the reduced diameter portion of the lower part of the holder 111.

  Further, the shape of the umbrella portion 115b is such that the angle θa with respect to the horizontal direction is formed in the range of 0 degrees to 15 degrees downward at the base portion intersecting with the shaft portion 115a, and at the lower end of the umbrella portion 115b, the horizontal portion The angle θb with respect to the direction is formed in the range of 50 to 70 degrees downward. The boiled soup cover 115 is attached at a position where the lower end of the umbrella portion 115 b is above the lower end of the holder 111. In the temperature detection apparatus 100 of the present embodiment, the thermal head 110 does not adhere to the support pipe 120 even when used for a long period of time. In the following, as a preparation for explaining the reason, in the conventional thermal head 210, the reason why the sticking occurs due to long-term use (although the boiled juice is not applied to the lower end of the holder 111) will be described.

  FIG. 3 is an explanatory diagram showing the reason why sticking occurs in the conventional thermal head 210 due to long-term use. As shown in FIG. 3A, in the conventional thermal head 210, the boiled juice cover umbrella portion 215b covers the lower end of the holder 111 (therefore, the lower end of the umbrella portion 215b is lower than the lower end of the holder 111). Is attached) When boiling occurs during cooking, the boiling juice flows down over the umbrella portion 215b of the boiling juice cover as shown by the white arrow in FIG. Boiled juice is not applied to the lower end. In FIG. 3, in order to show the state of the back side of the umbrella part 215b, a part of the umbrella part 215b and a part of the lower end of the holder 111 are broken.

  The boiled juice that has flowed down the umbrella portion 215b is stored in the lower part of the stove burner 10 (see FIG. 1), and then burned by the radiant heat from the flame of the stove burner 10 every time the cooking container is heated. Oil smoke is generated from the boiled juice. The generated oil smoke ascends along the support pipe 120 and enters the back side of the umbrella portion 215b, as indicated by the dashed arrows in FIG. Here, since the back side of the umbrella part 215b has a dead end shape that narrows toward the top, the oil smoke that has entered the back side of the umbrella part 215b stays there. In addition, as described above with reference to FIG. 1, secondary air flows upward through the opening 10 a during the combustion of the stove burner 10, but the back side of the umbrella 215 b is narrowed to the back, so Secondary air does not flow. As a result, the oil smoke that has entered the back side of the umbrella 215b continues to stay there for a long period of time. In FIG. 3B, the oil smoke that enters and stays behind the umbrella portion 215b is indicated by hatching. The rising secondary air flow is indicated by a white arrow.

  In this way, when the oil smoke generated by boiling enters the back side of the umbrella part 215b and stays for a long time, the back side of the umbrella part 215b in contact with the oil smoke or the holder 111 to which the umbrella part 215b is attached. The lower end and the portion of the support pipe 120 covered with the umbrella 215b are gradually soiled by the oil smoke. And if it is used for a long time, as shown in FIG.3 (c), the back side of the umbrella part 215b, the lower end of the holder 111, and the support pipe 120 will be in the state contaminated black with oil smoke. In particular, since the lower end of the holder 111 is in a deep part on the back side of the umbrella portion 215b, dirt easily proceeds, and the holder 111 is fixed to the support pipe 120.

  On the other hand, in the thermal head 110 of this embodiment, as shown in FIG. 2, the lower end of the umbrella portion 115 b of the boiled juice cover 115 exists above the lower end of the holder 111. For this reason, even if the stove burner 10 is used over a long period of time, the thermal head 110 does not adhere to the support pipe 120. Hereinafter, this point will be described.

  FIG. 4 is an explanatory diagram showing the reason why sticking does not occur even when the stove burner 10 is used over a long period of time in the thermal head 110 of this embodiment. Also in the thermal head 110 of this embodiment, when boiling occurs during cooking, the boiling juice becomes boiled juice cover 115 (FIG. 2) as indicated by the white arrow in FIG. B) and the lower part of the holder 111 does not get boiled juice. Moreover, the boiled simmered juice that has flowed down accumulates in the lower part of the stove burner 10 (see FIG. 1) and is heated by the flame of the stove burner 10 to generate oily smoke. The oil smoke rises along the support pipe 120 and enters the back side of the umbrella portion 115b, as indicated by the dashed arrows in FIG. However, in the thermal head 110 of the present embodiment, since the lower end of the umbrella portion 115 b is above the lower end of the holder 111, oil smoke does not stay around the lower end of the holder 111. For this reason, even if the stove burner 10 is used over a long period of time, the lower end of the holder 111 and the supporting pipe 120 around the holder 111 are not contaminated with oil smoke.

  Of course, the oil smoke rising along the support pipe 120 enters the back side of the umbrella portion 115b and stays there. However, in the thermal head 110 according to the present embodiment, the umbrella portion 115b expands in a substantially horizontal direction at the base portion where the umbrella portion 115b intersects with the shaft portion 115a (see FIG. 2). Shape). For this reason, the secondary air rising along the support pipe 120 easily flows into the back side of the umbrella portion 115b and pushes away the remaining oil smoke, so that the oil smoke does not stay on the back side of the umbrella portion 215b indefinitely. . In FIG.4 (b), the oil smoke which entered the back side of the umbrella part 115b is displayed with the oblique line, and the flow of secondary air is displayed by the white arrow.

  For this reason, in the thermal head 110 of the present embodiment, even if the stove burner 10 is used for a long period of time, the back side of the umbrella portion 115b is not smudged with oil smoke, and therefore, as shown in FIG. As described above, the lower end of the holder 111 and the supporting pipe 120 around the holder 111 can be kept in a state of being hardly contaminated. As a result, even when the stove burner 10 is used for a long time, it is possible to avoid the thermal head 110 from being fixed to the support pipe 120.

  In addition, as described above with reference to FIG. 2, the lower end of the umbrella portion 115b is formed at an angle of 50 degrees to 70 degrees downward with respect to the horizontal direction, so that the slope is steep. For this reason, as shown in FIG. 5, even when the drops of boiled juice adhering to the lower end of the umbrella part 115b are covered with the flow of secondary air and adhere to the back side of the umbrella part 115b, the back side of the umbrella part 115b. Will not spread upward. In FIG. 5, the drops of boiled juice are displayed with diagonal lines, and the flow of secondary air is indicated by white arrows. Thus, since the boiled juice is less likely to get dirty with the boiled juice on the back side of the umbrella portion 115b, the thermal head 110 is more difficult to adhere to the support pipe 120.

  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 umbrella portion 115b has been described as being formed in a shape in which the diameter is increased in the horizontal direction from the shaft portion 115a and then gradually expanded in the downward direction. However, as shown in FIG. 6 (a), a conical cylindrical umbrella portion 115b whose diameter is increased downward from the shaft portion 115a at the same angle may be used. Even if it does in this way, if the lower end of the umbrella part 115b is set above the lower end of the holder 111, oil smoke does not stay around the lower end of the holder 111. The surrounding support pipe 120 is not soiled with oil smoke. For this reason, it is possible to avoid the thermal head 110 from sticking to the support pipe 120 even after long-term use.

  Further, in the present embodiment described above, the umbrella portion 115b has been described as being formed in a shape whose diameter is expanded from the shaft portion 115a substantially in the horizontal direction or slightly downward in the horizontal direction. However, as shown in FIG. 6B, the shape of the umbrella portion 115b may be a shape in which the diameter is increased upward from the shaft portion 115a in the horizontal direction and then gradually changed in the downward direction. good. By doing so, as indicated by the white arrow in FIG. 6B, the secondary air easily flows through the back side of the umbrella part 115b, so that the oil smoke is less likely to stay on the back side of the umbrella part 115b. . As a result, the back side of the umbrella portion 115b becomes more difficult to get dirty, and it is possible to more reliably avoid the thermal head 110 from being fixed to the support pipe 120 even after long-term use.

  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, 3 ... virtues, 10 ... stove burner,
10a ... opening, 11 ... burner body, 12 ... mixing tube,
13 ... burner head, 14 ... burner cap, 15 ... spark plug,
DESCRIPTION OF SYMBOLS 100 ... Temperature detection apparatus, 110 ... Thermal head, 110a ... Fitting part,
111 ... Holder, 112 ... Heat collecting plate, 113 ... Temperature sensor,
114 ... Coil spring, 115 ... Boiled soup cover, 115a ... Shaft part,
115b ... umbrella part, 120 ... support pipe.

Claims (2)

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 that is formed in a substantially cylindrical shape and is fitted into the support pipe in a manner in which the lower end side is movable in the vertical direction;
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;
A boiled soup cover that prevents the boiled soup from the cooking container from being applied to the lower end of the holder, and
The boiled soup cover has an umbrella part having a shape that expands downward, and the lower end of the umbrella part is attached to a position above the lower end of the holder ,
The umbrella part of the boiled soup cover is formed in a cylindrical shape and is expanded from the shaft part for attaching the boiled soup cover to the holder in an angle range of 15 degrees from the horizontal direction to the horizontal direction downward. The temperature detecting device is formed in a shape that expands downward at a larger angle . The temperature detection device according to claim 1,
The boiled soup cover is a temperature detecting device in which the lower end of the umbrella part is formed in a shape having an angle range of 50 degrees to 70 degrees downward from the horizontal direction .

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