KR20150146456A

KR20150146456A - Temperature detection apparatus

Info

Publication number: KR20150146456A
Application number: KR1020150088517A
Authority: KR
Inventors: 유키 미노우라
Original assignee: 린나이코리아 주식회사; 가부시키가이샤 다테야마카가쿠센서테크놀로지; 린나이가부시기가이샤
Priority date: 2014-06-23
Filing date: 2015-06-22
Publication date: 2015-12-31
Also published as: KR101729208B1; JP2016008727A; JP6152524B2

Abstract

[PROBLEMS] To provide a temperature detecting device in which a thermo-sensitive head is not fixed to a support pipe even by prolonged use.
[MEANS FOR SOLVING PROBLEMS] A heat pipe head is provided in a support pipe installed at the center of a stove burner. A boiling broth cover for preventing the boiling soup from hanging at the lower end of the thermal head is installed in the thermo head, A flexible cover for blocking the flow of oil smoke rising along the support pipe is provided at a position lower than the boiling broth cover. When fine particles are adhered to the back side of the boiled broth cover by the oil mist, the broth that has been boiled over is spread and expanded, so that the solidified portion of the boiled broth expands, but when the flexible cover is installed, It is possible to prevent the fine particles from adhering to the back side of the cover, so that the boiled broth is not transmitted and solidified, and it is possible to prevent the thermal head from sticking to the support pipe.

Description

[0001] TEMPERATURE DETECTION APPARATUS [0002]

The present invention relates to a temperature detecting device for detecting a temperature of a cooking container by abutting against a bottom portion of a cooking container placed on a pedestal of a gas stove.

A temperature detecting device is widely known which detects the temperature of a cooking container which is provided at the center of a stove burner and is heated and cooked by a stove burner. This temperature detecting device is provided with a support pipe installed at the center opening of the stove burner and a substantially cylindrical heat-sensitive head provided so as to be movable up and down with respect to the support pipe. The thermal head is elastically supported upward by a coil spring. In addition, a temperature sensor is incorporated in the thermal head. Then, when the cooking vessel is placed on the base of the cooking stove, the bottom of the cooking vessel is pressed downward to bring the top surface of the thermal head into contact with the bottom of the cooking vessel. As a result, it becomes possible to detect the temperature of the cooking container with the temperature sensor built in the thermal head.

Here, boiling may occur in the cooking container during the heating cooking. When boiling broth penetrates between the lower end of the thermal head and the support pipe, the thermal head sticks to the support pipe, making it impossible to support the thermal head elastically upward. Then, even if the cooking container is placed on the pedestal, it is impossible to bring the upper surface of the thermal head into contact with the bottom of the cooking vessel, and it becomes impossible to detect the temperature of the cooking vessel.

Here, the conical tubular member (boiling broth cover) formed to extend downward is provided on the thermal head to cover the lower end portion of the thermal head, for example, even if boiling occurs, the thermal head and the support pipe (See Japanese Patent Application Laid-Open No. 2001-325899).

JP 2013-044468 A

However, in the above-described temperature detecting device, although the lower end portion of the thermosensitive head is covered with the boiled broth cover so that the broth that has boiled over the gap between the thermosensitive head and the support pipe is prevented from intruding, So that it is difficult to detect the temperature of the cooking container.

SUMMARY OF THE INVENTION The present invention has been devised in response to the above-described problems of the prior art, and provides a temperature detection device capable of detecting the temperature of a cooking vessel without being fixed to a support pipe even by prolonged use. There is a purpose.

Means for Solving the Problems A temperature detecting apparatus according to the present invention for solving the above-mentioned problems employs the following configuration. That is, a temperature detecting device for detecting the temperature of the cooking container placed on the pedestal, the temperature detecting device being installed at the center of the stove burner, comprising: a support pipe installed at the center of the stove burner; A temperature sensor provided on a lower surface of the heat collecting plate; and a coil spring for elastically supporting the holder upward, wherein the holder is provided with a coil spring at a lower end of the holder, And a flexible cover for blocking the flow of oil smoke rising along the support pipe is installed at a position lower than the boiling broth cover so as to prevent the boiling broth from hanging from the cooking vessel .

In the temperature detecting device according to the present invention, the holder is provided on the support pipe in a state in which the holder can move in the up and down direction, and the holder is provided with a boiling broth cover for preventing the broth hanging at the bottom of the holder from hanging. A flexible cover for blocking the flow of oil smoke rising along the support pipe is provided at a position lower than the boiling broth cover.

As will be described later in detail, the reason why it is impossible to prevent sticking of the holder and the support pipe by simply preventing boiling broth with the boiled broth cover is as follows. First, when boiling occurs, boiling broth flowing down to the bottom of the stove burner is heated to generate oil smoke. The generated oil smoke rises along the support pipe, and when the oil smoke reaches the boiled broth cover, the fine particles forming the oil smoke are attached to one surface of the back side of the boiled broth cover. In this way, the boiled broth is likely to expand at the portion where the fine particles of the oil mist are adhered. Therefore, whenever boiled broth is caught in a boiling broth cover, the broth which has been boiled over with the particulate attaching portion gradually expands, and the portion where the boiled broth becomes solidified gradually expands gradually. As a result, it soon reaches the gap portion with the support pipe at the lower end of the holder, and fixes the holder and the support pipe.

On the other hand, in the temperature detecting device of the present invention, a flexible cover for blocking the flow of oil smoke is provided below the boiled broth cover. Therefore, in the portion where the oil smoke is blocked by the flexible cover, the fine particles of the oil smoke do not adhere to the boiled broth cover, and the boiled broth does not expand. As a result, the temperature of the cooking container can be detected without being fixed to the support pipe even by long-time use.

In the temperature detecting apparatus of the present invention described above, the flexible cover having a smaller diameter than the boiled broth cover may be provided at a position above the lower end of the holder.

In this case, since the flexible cover can be installed at a position close to the boiled broth cover, it is possible to more reliably prevent the fine particles of the oil smoke from adhering to the boiled broth cover. Further, since the flexible cover is formed to have a smaller diameter than the boiled broth cover, boiled broth flowing down along the upper surface of the boiled broth cover is not attached to the flexible cover. Therefore, the boiled broth hangs on the flexible cover, so that the boiled broth attached to the flexible cover expands to the lower side of the flexible cover and solidifies, so that there is no fear that the holder is fixed to the support pipe.

Further, in the temperature detecting device of the present invention described above, the boiled broth cover and the flexible cover may be integrally formed through the cylindrical member. Then, the boiled broth cover and the flexible cover may be provided on the holder together with the cylindrical member.

By doing so, it is possible to provide a boiled broth cover and a flexible cover by simply placing the cylindrical member on the holder. Therefore, it is possible to perform the same simple manufacturing without increasing the number of parts as compared with the conventional temperature detecting device in which a boiled broth cover is provided but a flexible cover is not provided.

As described above, according to the present invention, a flexible cover for blocking the flow of oil smoke is provided at a position lower than the boiling broth cover so that fine particles of oil mist are adhered to the boiled broth cover at the portion where the oil smoke is blocked As a result, it is possible to detect the temperature of the cooking container without fixing the holder to the supporting pipe even by using for a long period of time.

1 is a sectional view showing the structure of a gas furnace equipped with the temperature detecting device of the present embodiment.
2 is a cross-sectional view showing the internal structure of the thermal head of this embodiment.
3 is an explanatory view showing a conventional thermal head without a flexible cover.
4 is an explanatory view showing the reason why a conventional thermal head is fixed to a support pipe by long-time use.
5 is an explanatory view showing the reason why the thermal head is not fixed to the support pipe in the temperature detecting device of this embodiment
6 is an explanatory view showing a thermal head of the temperature detecting device of various modified examples.

1 is a sectional view showing the structure of a gas furnace 1 equipped with the temperature detecting device 100 of the present embodiment. The gas furnace 1 is provided with an upper plate 2 covering an upper surface of a furnace body (not shown) and having a burner opening 4 formed thereon, A cooking stove 10 for heating a container, a pedestal 3 on which a cooking pot such as a pot is placed, and a temperature detecting device 100 for detecting the temperature of the cooking pot placed on the pedestal 3 have.

The stove burner 10 includes a burner body 11 formed in a circular ring shape, a mixing tube 12 extending from the burner body 11, and a circular ring burner head 12 placed on the top surface of the burner body 11, (13). The burner head 13 is made of a die cast material such as aluminum, and a plurality of grooves (groove 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 flutes 13a are formed between the plurality of flutes formed in the burner head 13 and the upper surface of the burner body 11. [ Further, a burner cap 14 made of sheet metal is attached to the upper portion of the burner body 11.

When the fuel gas is injected toward the mixing tube 12 at the opening end of the mixing tube 12 extending from the burner body 11, a mixed gas of fuel gas and air is generated inside the mixing tube 12, Is supplied to the burner body (11), and the mixed gas is blown out from the flute (13a). Then, by igniting the mixed gas with the spark plug 15, it is possible to start combustion of the stove burner 10. About half of the secondary air is supplied from the gap between the burner head 13 and the burner cap 14 through the opening 10a formed at the center of the burner burner 10, do. Therefore, a strong flow upward is generated by the secondary air in the opening 10a during burning of the stove burner 10. [

A support pipe 120 is installed inside the opening 10a and a substantially cylindrical thermal head 110 is installed on the upper end of the support pipe 120 so as to be slidable with respect to the support pipe 120 . The temperature detecting device 100 of the present embodiment is formed by the thermal head 110 and the support pipe 120. As will be described in detail later, in the case where the cooking vessel is not placed on the pedestal 3 as a result of the coil spring springing up the thermal head 110 upwardly, the temperature sensor 110 and the coil spring are incorporated , The upper end of the thermal head 110 protrudes from the upper surface of the pedestal 3 (the surface on which the cooking container is placed). When the cooking vessel is placed on the pedestal 3, the thermal head 110 is pressed downward by the bottom of the cooking vessel, and the upper surface of the thermal head 110 is pressed by the force of the coil spring It touches the bottom. Therefore, the temperature of the bottom of the cooking container can be detected by the temperature sensor built in the thermal head 110.

2 is an explanatory view showing the internal structure of the thermal head 110 of the present embodiment. The thermal head 110 includes a substantially cylindrical holder 111 formed of sheet metal, a metal heat collecting plate 112 provided to close the upper end of the holder 111 and a temperature sensor 113 and a coil spring 114 for elastically supporting the holder 111 together with the heat collecting plate 112 upward. In this embodiment, a flange portion 111a formed by machining the upper end of the holder 111 into a flange shape is formed, and the heat collecting plate 112 is caulked and fixed to the flange portion 111a. However, The heat collecting plate 112 may be attached to the holder 111 by welding or the like.

The support pipe 120 on which the thermal head 110 is installed has an upper end expanded in the shape of a flange and a portion formed in the flange shape is inserted into the holder 111. Therefore, the holder 111 can be moved in the axial direction with respect to the support pipe 120. The lower end of the holder 111 is reduced in diameter over a predetermined length so that an engaging portion 110a is formed between the inner peripheral surface of the reduced diameter portion of the holder 111 and the outer peripheral surface of the support pipe 120 . Therefore, even if the holder 111 moves while the enlarged portion of the support pipe 120 is inserted into the holder 111, the support pipe 120 is not separated from the support pipe 120. The coil spring 114 is housed in the holder 111 in a slightly compressed state, and therefore always supports the thermal head 110 elastically upward. Two lead wires 116 are drawn out from the temperature sensor 113 and connected to the outside through the inside of the support pipe 120 in a state of being protected by a rigid heat-resistant tube 117 braided with glass fiber have.

In the thermal head 110 of the present embodiment, a cover member 115 is attached to a portion of the lower portion of the holder 111 which is reduced in diameter. The cover member 115 includes a normally formed cylindrical member 115c and a boiling broth cover 115a formed by press working in the shape of a conical cylinder extending downward from the upper end portion of the cylindrical member 115c, And a flexible cover 115b formed by pressing the lower end portion of the cylindrical member 115c in a flange shape. The outer diameter of the flexible cover 115b is smaller than the outer diameter of the broth cover 115a. The cover member 115 is attached to the holder 111 at a position where the flexible cover 115b is positioned above the lower end of the holder 111. [

Thus, in the temperature detecting device 100 of the present embodiment, since the flexible cover 115b is provided at the position below the boiled broth cover 115a in addition to the boiled broth cover 115a, The thermal head 110 is not adhered to the support pipe 120. [ Hereinafter, as a preparation for explaining these reasons, the case of the conventional thermal head 210 without the flexible cover 115b will be described.

3 is an explanatory view showing a rough shape of a conventional thermal head 210 without the flexible cover 115b. As shown in the figure, the conventional thermosensitive head 210 is provided with a soup cover 215a beneath the holder 111. However, the flexible cover 115b provided in the thermosensitive head 110 of the present embodiment I do not have.

Even in such a conventional thermal head 210, the boiling broth flows down onto the boiled broth cover 215a as indicated by a thick broken-line arrow in Fig. 3 (a) It is conceivable that the boiled broth does not enter into the gap of the support pipe 120 and thus the thermal head 210 is not fixed. However, if it is used over a long period of time, the back side of the boiled broth cover 215a is refluxed at the lower end to expand the oil hour as indicated by a thick broken line arrow in Fig. 3 (b) 111) to fix the thermal head 210. The mechanism by which this phenomenon occurs is thought to be as follows.

Fig. 4 is an explanatory view showing the reason why the oil field is extended to the back side of the boiled broth cover 215a in the conventional thermal head 210. [0156] Fig. In Fig. 4, the lower portion of the holder 111 is shown enlarged. When boiling over occurs, boiling broth flows down along the upper surface of the boiled broth cover 215a as shown in Fig. 4 (a). The hatched portion in Fig. 4 (a) shows boiling broth flowing down along the upper surface of the boiled broth cover 215a.

The boiling broth flowing and falling down is stored in the lower portion of the stove burner 10 (see Fig. 1), and then heated by radiant heat from the flame of the stove burner 10 every time the stove is cooked. Therefore, the oil smoke is generated from the boiled broth soon enough to rise along the support pipe 120 as shown by the broken arrow in Fig. 4 (b), and the back side of the boiled broth cover 215a Lt; / RTI > As a result, oily fine particles forming oil smoke adhere to the back side of the boiled broth cover 215a. In Fig. 4 (b), the small black spot displayed on the back side of the boiled broth cover 215a shows a state in which fine particles due to oil smoke are attached. 4, the size of the fine particles (black spots) is displayed larger than the actual size, and the density of the attached particles is displayed lower than the actual size (sparsely attached).

In this state, when oozing occurs, in the state where oily fine particles adhere to the back side of the boiled broth cover 215a, the broth cover 215a flows down over the top surface of the broth cover 215a, At the bottom, a boiling broth is attached. In Fig. 4 (c), boiling broth drops attached to the lower end of the boiled broth cover 215a are indicated by hatching. Here, since the boiled broth contains the oil component, it has high affinity with the oily fine particles attached to the back side of the broth cover 215a, which has been boiled, and the back side of the broth cover 215a, And becomes wet. The "state in which it is easily wetted with boiling broth" means that the boiled broth becomes spherical and the surface area is small, and the boiled broth is thinned on the surface of the object (here, the back side of the boiled broth cover 215a) And the state in which the interfacial energy becomes smaller is the expansion side. Therefore, the boiling water droplets adhering to the lower end of the boiled broth cover 215a flow backward on the back side of the boiled broth cover 215a and expand upward.

1, a strong flow of the secondary air is generated in the opening 10a during burning of the stove burner 10 from the lower side toward the upper side. The white arrow shown in Fig. 4 (c) shows the flow of such secondary air. Therefore, the boiling water droplets are pushed by the flow of the secondary air, and flow back upward from the backside of the boiled broth cover 215a. Then, the boiled broth expanded to the back side of the broth cover 215a which has been boiled up in this way is dried under the influence of the heat in the stove burner 10, and gradually becomes solidified.

As a result of repeating this process every time when boiling over occurs, the back side of the boiled broth cover 215a is flowed upward upward, and the portion where the boiled broth becomes solidified expands. In Fig. 4 (d), the area denoted by a thin line indicates a portion where boiling broth has solidified. Therefore, if the stove burner 10 is continuously used for a long time, it can be considered that the solidified portion is transmitted to the lower end of the holder 111, and the thermal head 210 is fixed to the support pipe 120 . On the other hand, the thermal head 110 of the present embodiment is provided with the flexible cover 115b below the boiled broth cover 115a, so that even if the thermal head 110 is used over a long period of time, 120).

Fig. 5 is an explanatory view showing the reason why sticking does not occur in the thermal head 110 of the present embodiment having the flexible cover 115b. 5, the lower portion of the holder 111 is shown enlarged. 4, in the same manner as the conventional thermal head 210 described above with reference to FIG. 4, when boiling occurs, boiling broth flows along the upper surface of the boiled broth cover 115a (See Fig. 5 (a)). Then, the boiling broth flowing and falling down is stored in the lower portion of the stove burner 10 (see Fig. 1) to generate oil smoke.

The generated oil smoke rises along the support pipe 120 as indicated by a broken line arrow in FIG. 5 (b), but a flexible cover 115b is provided below the boiled broth cover 115a. Therefore, oily fine particles do not adhere to the entire backside of the boiled broth cover 115a, and fine particles do not adhere to the portion blocked by the flexible cover 115b. As described above, since the boiled broth cover 115a is formed to have a larger diameter than the flexible cover 115b, in the radially outer portion that is not blocked by the flexible cover 115b, Fine particles are adhered to the back side of the substrate 115a. Of course, fine particles are attached to one surface of the lower surface of the flexible cover 115b. 5, oil-based fine particles are indicated by small black spots in the same manner as in Fig. 4 described above.

Subsequently, when the boiling over occurs, the boiling soup bubble is attached to the lower end of the boiled broth cover 115a, as shown by a shaded area in Fig. 5 (c). Since oily fine particles are adhered to the radially outer portion of the back side of the boiled broth cover 115a, the boiling water droplets flow backward from the back side of the broth cover 115a that has been overflowing . However, in the thermal head 110 of this embodiment, oil-based fine particles are attached to the back side of the boiled broth cover 115a only at the radially outer portion, and the oil cover No particulates adhere to the radially inner portion. Therefore, after the boiled broth is expanded in the portion where the fine particles are adhered, there is no further expansion. 5 (c), the flow of the secondary air is also blocked, so that the backside of the broth cover 115a, which has been boiled and boiled, is pushed back by the flow of the secondary air, There is nothing to do. Therefore, in the thermal head 110 of the present embodiment, boiling broth is solidified in the radially outer portion of the back side of the boiled broth cover 115a, but the solidified portion is enlarged further There is no work. 5 (d) shows a region where boiling broth has solidified.

As shown in Fig. 5 (b), fine particles of oil smoke are attached to the lower surface of the flexible cover 115b. In the upper part of the flexible cover 115b, A broth cover 115a is provided. Therefore, the boiled broth is prevented from hanging from the boiled broth cover 115a and hanging from the flexible cover 115b (see Fig. 5 (a)). Therefore, There is no job. Therefore, although fine particles due to oil mist are attached to the lower surface of the flexible cover 115b, the boiled broth is not expanded and fixed there. As a result, the solidified portion of the broth which has boiled over in the flexible cover 115b is expanded so that the thermal head 110 is not fixed to the support pipe 120. [

In the thermal head 110 of this embodiment, the boiled broth cover 115a and the flexible cover 115b are integrally formed as the cover member 115. However, the cover member 115 It is possible to attach the boiled broth cover 115a and the flexible cover 115b. Therefore, even in the case of the conventional thermal head 210, the manufacturing process is not complicated in any case. If the broth cover 115a and the flexible cover 115b are integrally formed as described above, management of the positional relationship (distance and coaxiality) of the boiled broth cover 115a and the flexible cover 115b can be easily performed The manufacturing tolerance of the temperature detecting device 100 can be suppressed.

There are various modified examples of the temperature detecting device 100 of the present embodiment described above. Hereinafter, these modified examples will be briefly described with a focus on the difference from the temperature detecting device 100 of the present embodiment. Fig. 6 is an explanatory diagram showing the integrated thermal head 110 of the temperature detecting device 100 according to the modification. In the above-described embodiment, the flexible cover 115b is formed as a horizontal disk. However, as shown in Fig. 6 (a), the flexible cover 115b may also be formed into a conical tube shape extending downward like the boiled broth cover 115a.

Further, in the above-described embodiment, the broth cover 115a that has been boiled is formed in a conical shape extending downward. However, as shown in Fig. 6 (b), the boiled broth cover 115a may be formed into a horizontal disc shape like the flexible cover 115b.

Alternatively, in the above-described embodiment, both the broth cover 115a and the flexible cover 115b, which have been boiled, are attached to the holder 111. [ However, as long as the flexible cover 115b is lower than the position where the holder 111 is pressed, as indicated by a thin dotted line in Fig. 6 (c), it is sufficient if the flexible cover 115b is mounted below the boiled broth cover 115a. The flexible cover 115b may be attached to the support pipe 120. [

Alternatively, in the above-described embodiment, the flexible cover 115b is formed to have a smaller diameter than the boiled broth cover 115a. However, when the flexible cover 115b is attached to the support pipe 120, as shown in Fig. 6 (d), the flexible cover 115b may be formed to have a diameter larger than that of the broth cover 115a that has overflowed. Of course, when the flexible cover 115b is formed to have a larger diameter than the boiled broth cover 115a, the boiled broth flowing down along the upper surface of the boiled broth cover 115a is suspended on the flexible cover 115b Overflowing droplets are attached. As a result, the oily fine particles attached to the back side of the flexible cover 115b are transmitted to solidify the expanded boiled broth. However, since the lower end of the holder 111 is located above the flexible cover 115b, even if the solidified portion on the lower surface of the flexible cover 115b is extended, the thermal head 110 is fixed to the support pipe 120 There is nothing to be done.

As described above, the temperature detecting apparatus 100 of the present embodiment and various modified examples has been described. However, the present invention is not limited to the above-described embodiments, and can be implemented in various ways without departing from the gist of the present invention.

1: gas stove 2: top plate 3: pedestal
10: stove burner 10a: opening 13: burner head
100: temperature detecting device 110: thermal head 111: holder
112: heat collecting plate 113: temperature sensor 114: coil spring
115: cover member 115a: boiled broth cover
115b: flexible cover 116: lead wire 120: support pipe

Claims

A temperature detecting device for detecting the temperature of a cooking container placed on a pedestal, the temperature detecting device being installed at the center of a stove burner,
A support pipe installed at the center of the stove burner,
A holder coupled to the support pipe in a state in which the support pipe can move in a vertical direction,
A heat collecting plate mounted on an upper end of the holder,
A temperature sensor provided on a lower surface of the heat collecting plate,
And a coil spring for elastically supporting the holder upward,
Wherein the holder is provided with a boiling broth cover which prevents the broth from boiling from the cooking vessel from hanging at the lower end of the holder,
Wherein a flexible cover is provided at a position lower than the boiling broth cover to block the flow of oil smoke rising along the support pipe.

The method according to claim 1,
Wherein the flexible cover is smaller in diameter than the boiled broth cover and is provided at a position above the lower end of the holder.

3. The method of claim 2,
The boiled broth cover is integrally formed with the cylindrical member on the upper end of the cylindrical member attached to the outside of the holder,
Wherein the flexible cover is formed integrally with the cylindrical member at a lower end of the cylindrical member.