JP5725964B2 - Temperature detection device - Google Patents

Description

  The present invention relates to a temperature detection device, and more particularly to a temperature detection device for detecting the temperature of a cooking utensil (cooking utensil) such as a pan placed on a cooking appliance such as a gas stove or gas table.

  Conventionally, cooking appliances such as gas stoves and gas tables are equipped with a temperature detection device that detects that cooking utensils (cooking utensils) such as pans are placed, and further detects the temperature in contact with the bottom of the cooking utensils. ing.

  Such a temperature detection device for a cooking utensil is provided on the upper surface of a cooking device such as a gas table as shown in FIG. 3, for example, and touches the bottom surface of a cooking utensil 142 such as a pan placed on the cooking device. In contact therewith, the sensor device unit 144 is provided so as to be retractable by placing the cooking utensil 142, and the sensor device unit 144 is attached to the upper end of the sensor device unit 144. A heat collecting plate 148 that comes into contact with the bottom surface of the cooking utensil 142 is provided, the temperature sensor 152 fixed to the back surface of the heat collecting plate 148 and the temperature sensor 152 are accommodated, and the entire upper end of the heat collecting plate 148 is liquid-tight. A fixed cylindrical holder 156 is provided, and a heat collecting plate 148 and a spring member 158 that urges the holder 156 in the protruding direction with respect to the support shaft 146 are provided. There has been proposed a temperature detection device that includes a cover 162 that is concentrically covered from the upper end portion to the vicinity of the lower end portion with a predetermined space and fixed in a liquid-tight manner around the entire upper end portion of the holder 156 and the lower end portion is opened. (See Patent Document 1).

  As another temperature detection device, for example, as shown in FIG. 4, an inner cylinder 182 whose upper end is closed by a heat collecting plate 181 that is in contact with the bottom surface of the cooking utensil P, and an outer cylinder 183 that surrounds the inner cylinder 182. And a temperature detecting device (pan temperature sensor) 108 for a stove, in which a temperature detecting element 180 is attached to the lower surface of the heat collecting plate 181, and a lid portion 185 projecting radially inward is provided at the upper end of the outer cylinder 183. The lid portion 185 is configured to be in non-contact with the inner cylinder 182 so that a gap 186 remains between the lid portion 185 and the inner cylinder 182, and the lid portion 185 is provided on the outer periphery of the heat collecting plate 181. It is possible to simmer from the gap 186 by integrally forming a non-contact umbrella part 187 on the lid part 185 so as to cover the gap 186 from above and covering the gap 186 from above. Enters the outer cylinder 183 Temperature sensing device has been proposed which is adapted to (see Patent Document 2).

  However, in the case of the temperature detection device of Patent Document 1, the cover 162 is liquid-tightly fixed around the entire upper end of the holder with respect to the holder 156 that is liquid-tightly fixed to the heat collecting plate that detects the bottom temperature of the cooking utensil. In order to do so, it is necessary to increase the contact area between the holder 156 and the cover 162. As a result, the heat transfer area between the holder 156 and the cover 162 is increased, and the temperature of the cooking utensil 142 such as the pan bottom where the heat collecting plate 148 contacts is accurately detected. There is a problem that it becomes difficult to do.

  In the case of Patent Document 2, a lid portion 185 is provided on the upper end of the outer cylinder 183 so as to project radially inward, so that a gap remains between the lid portion 185 and the inner cylinder 182. Although it will be possible to accurately detect the temperature of a pan or the like that contacts the heat collecting plate 181, if a spill from the pan or the like enters the gap and adheres, it is difficult to clean and the original performance There is a problem that it becomes impossible to maintain. In addition, since the upper end portion (lid portion) 185 of the outer cylinder 183 is not restrained by other members or the like, the acoustic vibration is not suppressed in a situation where acoustic vibration at an audible frequency occurs. When the position of the cooking utensil is shifted with the heat collecting plate 181 in contact with the cooking utensil (pan bottom, etc.) (when rubbing with the cooking utensil), a high-frequency metal sound is likely to be generated. There is a problem that a feeling of use cannot be secured.

JP 2008-170038 A JP 2004-061002 A

  The present invention solves the above-described problems, can accurately detect the temperature of cooking utensils such as a pan, and is easy to clean even when a spill from a utensil falls and adheres. In addition, there is provided a temperature detection device capable of realizing a high-quality use feeling that is less likely to generate an unpleasant high-frequency metal sound even when the position of the cooking utensil is shifted while in contact with the cooking utensil. The purpose is to do.

In order to achieve the above object, a temperature detection apparatus for a cooking utensil according to the present invention (Claim 1) includes:
(a) a fixed-side support member that is fixed to an arbitrary fixing part of the cooking appliance and extends in the vertical direction;
(b) a movable-side support cylinder that is fitted to the outside of the fixed-side support member and supported so as to be movable up and down;
(c) an abutting body that is disposed at the upper end of the moving side support cylinder and is configured to always abut against the bottom surface of the cooking utensil by moving up and down following the vertical movement of the cooking utensil;
(d) a thermistor disposed on the lower surface side of the contact body in such a manner as to be thermally coupled to the contact body;
(e) a covering protective cylinder that concentrically covers the moving side support cylinder from the upper end to the vicinity of the lower end through a predetermined space;
The abutting body is configured such that, when seen in a plan view, its peripheral edge protrudes outside the outer periphery of the covering protective cylinder,
The covering protective cylinder is fixed to the outer periphery of the moving support cylinder at a position near the lower end of the moving support cylinder, and the upper end surface of the covering protective cylinder is on the lower surface of the contact body Just abutting, not fixed, and
The upper end surface of the covering protective cylinder is in contact with the lower surface of the contact body in the circumferential direction.

Moreover, the temperature detection apparatus of the cooking utensil of claim 2 comprises:
At the upper end of the moving side support tube, a collar portion protruding outward is formed, and
A peripheral edge portion of the contact body is in contact with the upper surface of the flange portion of the movable side support cylinder and is folded back so as to extend to the lower surface side beyond the outer peripheral portion of the flange portion. It is said.

Moreover, the temperature detection apparatus of the cooking tool of Claim 3 is
The covering protection cylinder includes an extension portion extending further downward than a fixed portion fixed to the outer periphery of the moving side support cylinder; and
The extension portion is configured to cover a part of the fixed side support member concentrically via a predetermined space.

The temperature detection device for a cooking utensil according to the present invention (Claim 1) is configured to always contact the bottom surface of the cooking utensil by moving up and down following the vertical movement of the cooking utensil at the upper end of the movable support cylinder. A contact body (heat collecting plate) for collecting heat is provided, and a thermistor is provided on the lower surface side of the contact body so as to be thermally coupled to the contact body, and A cover protection cylinder is provided for concentrically covering the upper end portion and the vicinity of the lower end via a predetermined space. Further, the peripheral edge portion of the contact body protrudes outside the outer periphery of the cover protection cylinder, Since the end surface is in contact with the lower surface of the abutment body in the circumferential direction, the influence of heat from the outside is blocked by the covering protection cylinder, and the temperature of the cooking utensil such as a pan bottom where the abutment body abuts is accurately detected. It becomes possible to do.
In the temperature detection device of the present invention (Claim 1), “the upper end surface of the covering protective cylinder is in contact with the lower surface of the contact body in the circumferential direction” is simply a case of contact or spot welding. It is a concept that includes the case where a part is fixed.

  Further, as described above, since the peripheral edge portion of the contact body protrudes outward from the outer periphery of the covering protection cylinder, even when spilled from the cooking utensil, the contact body and the covering protection cylinder Inhibition and prevention of simmering in or staying in the soup is easy and easy to maintain, ensuring good maintainability.

  In addition, since the upper end surface of the covering protective cylinder is in contact with the lower surface of the contact body in the circumferential direction, even when the position of the cooking tool is shifted while the bottom surface of the cooking tool is in contact with the contact body. In addition, it is possible to suppress the generation of high-frequency metallic sound due to the vibration of the covering protection cylinder, and the usability can be improved.

  Furthermore, since the upper end portion of the covering protection cylinder is covered with the contact body, even when the tip end portion of the covering protection cylinder has a burr, the tip end portion of the covering protection cylinder is mistaken when the user cleans it. There is no risk of injury from touching, improving safety.

In addition, the covering protective cylinder is fixed to the outer periphery of the moving support cylinder at a position near the lower end of the moving support cylinder, and the upper end surface of the covering protective cylinder is in contact with the lower surface of the contact body. only have, since the structure is not fixed, if you are heat conduction minimized from the covering tube into abutment body, more accurate temperature of the cooking utensil (such as a pot) in which the abutting member abuts Can be detected.
Note that “the upper end surface of the covering protection cylinder is only in contact with the lower surface of the flange portion and is not fixed” is in contact, but both are welded, brazed, or joined by a joining material. Is a state where is not fixed or fixed.

Further, as in the temperature detecting device for cooking utensils according to claim 2 , the upper end of the moving side support cylinder is formed with a flange that protrudes outward, and the peripheral part of the abutment body is formed on the moving side support cylinder. When it is configured to be in contact with the upper surface of the collar part and folded back so as to extend beyond the outer peripheral part of the collar part to the lower surface side, the structure in the vicinity of the collar part of the upper end part of the movable support cylinder is A three-layer structure consisting of a contact portion on the upper surface side of the flange portion and a contact body that is folded back to the lower surface side of the flange portion, resulting in a structure portion having high rigidity and mechanical strength. Even when the position of the cooking utensil is shifted while the bottom surface of the cooking utensil is in contact with the abutting body, it is possible to more effectively suppress the generation of high-frequency metallic sound due to the vibration of the covering protective cylinder. Thus, the feeling of use can be improved.

Moreover, like the temperature detection apparatus of the cooking utensil of Claim 3 , the covering protection cylinder is provided with the extension part further extended below from the fixed part fixed to the outer periphery of the moving side support cylinder, and the extension part is When the fixed side support member is configured to cover a part of the fixed side support member concentrically with a predetermined space, the extension portion suppresses the thermal effect on the fixed side support member, and the temperature of the cooking utensil is reduced. Furthermore, it becomes possible to detect accurately.

It is front sectional drawing which shows the temperature detection apparatus of the cooking utensil concerning the Example of this invention. It is sectional drawing which shows the principal part of the gas stove provided with the temperature detection apparatus of the cooking utensil concerning the Example of this invention. It is a figure which shows the structure of the conventional temperature detection apparatus. It is a figure which shows the structure of the other conventional temperature detection apparatus.

  Hereinafter, examples of the present invention will be shown and features thereof will be described in detail.

  FIG. 1 is a front sectional view showing a temperature detection device for a cooking utensil according to an embodiment of the present invention, and FIG. 2 is a cross section showing a main part of a gas stove provided with the temperature detection device for a cooking utensil according to an embodiment of the present invention. FIG.

  As shown in FIG. 2, the cooking device temperature detection device of this embodiment is a temperature detection device that is disposed in a burner portion of a gas stove and is used to detect the temperature of a cooking tool (such as a pan) 2. .

  In addition, since the structure of a gas stove and its burner part is already known, detailed structure is abbreviate | omitting illustration and the principal part structure is shown in FIG.

  The gas stove includes one burner part or two burner parts arranged in the horizontal direction, or one having more burner parts (not shown). Here, one gas stove equipped with the temperature detection device 1 is provided. The structure of the burner portion will be described with reference to FIG. 1 and FIG.

  As shown in FIG. 2, an annular burner base 41 is connected to the tip of the mixing tube 33 in the burner portion. An annular burner cap 5 is detachably mounted on the upper portion of the burner base 41. An insertion hole 4 is provided at substantially the center of the burner base 41 and the burner cap 5 so as to penetrate vertically.

  Grooves are formed in the periphery of the burner cap 5, and when the burner cap 5 is placed on the burner base 41, a plurality of flame outlets that form flames outwardly between the burner base 41 and the burner cap 5. (Not shown) are formed at intervals along the circumferential direction.

  The burner cap 5 is provided so as to be positioned substantially at the center of the burner opening formed on the top plate 11 of the stove. The cooking utensil 2 is placed on the top plate 11 at the periphery of the burner opening. Five virtues 12 are provided for placement.

And the temperature detection apparatus 1 of the cooking utensil arrange | positioned at this stove part, as shown in FIG.1 and FIG.2,
(a) a fixed-side support member (shaft) 56 that is fixed to an arbitrary fixing portion of the cooking appliance and extends in the vertical direction;
(b) a movable-side support cylinder (holder) 53 that is fitted on the outside of the fixed-side support member (shaft) 56 and is held so as to be vertically movable;
(c) A bottom surface of the cooking utensil 2 placed on the virtues 12 (FIG. 2) by being arranged at the upper end of the moving side support cylinder (holder) 53 and moving up and down following the vertical movement of the cooking utensil 2. A contact body (heat collecting plate) 51 configured to always contact the bottom surface of the cooking utensil 2 even when the position fluctuates in the vertical direction;
(d) It is arranged on the lower surface side of the contact body 51 in such a manner as to be thermally coupled to the contact body 51 and follows the vertical movement of the movable support cylinder 53 integrally with the contact body 51. A thermistor (temperature detection element) 57 for detecting the temperature of the cooking utensil 2 arranged so as to move up and down,
(e) Covering from the upper end of the moving side support cylinder 53 to the vicinity of the lower end (at least to a position below the center of the vertical dimension of the moving side support cylinder 53) concentrically through a predetermined space. A covering protection cylinder 63 is provided.

  The contact body 51 is made of a material having high thermal conductivity such as copper, and the outer diameter thereof is larger than the outer diameter of the covering protective cylinder 63. The portion is configured to protrude outward from the outer periphery of the covering protective cylinder 63.

Specifically, a flange portion 53 x protruding outward is formed at the upper end of the moving side support tube (holder) 53, and the peripheral portion of the contact body (heat collecting plate) 51 is formed on the moving side support tube 53. In addition to being in contact with the upper surface of the flange portion 53x, it is folded back over the outer peripheral portion of the flange portion 53x to the lower surface side thereof.
That is, the structure in the vicinity of the flange portion 53x of the movable side support cylinder 53 is folded back so as to wrap around the flange portion 53x, the contact body 51 on the upper surface side of the flange portion 53x, and the lower surface side of the flange portion 53x. It is configured to have a three-layer structure in which the contact bodies 51 overlap.

  Then, the upper end surface of the covering protection cylinder 63 is in contact with the lower surface of the contact body 51 (specifically, the lower surface of the contact body 51 folded back to the lower surface side of the flange portion 53x) in the circumferential direction. Yes. Moreover, in the temperature detection apparatus for cooking utensils of this embodiment, the moving side support cylinder 53 also has the flange 53x in contact with the contact body 51.

  However, although the upper end portion of the covering protection cylinder 63 is in contact with the contact body 51 in the circumferential direction, it is not fixed, and the covering protection cylinder 63 and the contact body 51 are kept in contact with each other. ing.

  The thermistor (temperature detection element) 57 is housed in the movable support cylinder 53 and is attached to the lower surface of the contact body 51 via the thermistor fixing plate 62 and is thermally coupled to the contact body 51. It is in a state. The thermistor 57 is housed in a cylindrical portion 64 that is formed in the vicinity of the center of the thermistor fixing plate 62, and a filler 58 is filled between the thermistor 57 and the cylindrical portion 64.

  A lead wire extending downward from the moving side support cylinder 53 is connected to the lower side of the thermistor 57. The lead wire is housed in the insulating tubes 59 and 60 and protected.

  The moving side support cylinder 53 is fitted on the outside of the fixed side support member (shaft) 56 and is attached to the fixed side support member (shaft) 56 so as to be movable up and down. It is attached in a fixed state to any fixed part of the stove.

  Further, a washer 55 is fitted into the upper end of the fixed-side support member 56 and is fixed by caulking. The washer 55 is configured such that its outer peripheral surface is in sliding contact with the inner peripheral surface of the movable support cylinder 53 so as to be movable in the vertical direction.

  A spring 54 is disposed between the lower surface of the contact body 51 and the upper surface of the washer 55 in the moving side support cylinder 53, and the moving side support cylinder 53 is attached to the fixed side support member 56 by the urging force of the spring 54. On the other hand, it is biased upward.

  In addition, the lower end side of the moving side support cylinder 53 has a region having a length L from the lower end as a small diameter portion 53 a having an inner diameter smaller than the outer diameter of the washer 55 and is inserted into the moving side support cylinder 53. The downward movement of the washer 55 fixed to the stationary support member 56 in the movable support cylinder 53 is restricted. That is, when the moving support cylinder 53 is urged upward with respect to the stationary support member 56 by the urging force of the spring 54, the moving support cylinder 53 has an inner diameter larger than the outer diameter of the washer 55. The boundary between the large-diameter portion 53b and the small-diameter portion 53a constitutes the restricting portion S. The restricting portion S prevents the washer 55 from moving downward, and the fixed-side support member 56 is connected to the moving side. The support cylinder 53 is configured to be prevented from being pulled out from the lower end side.

  The lower end of the moving side support cylinder 53 is drawn so that the diameter decreases inward, and the lower end of the drawn moving side support cylinder 53 is set against the outer peripheral surface of the fixed side support member 56. It is configured so as to be slidably movable in the vertical direction.

  In this manner, the movable support cylinder 53 and the fixed support member 56 are configured to be relatively movable in the vertical direction, while the outer peripheral surface of the washer 55 and the inner peripheral surface of the movable support cylinder 53. So that the displacement of the axis of the movable support cylinder 53 and the fixed support member 56 does not occur due to the sliding contact with each other and the sliding contact between the lower end surface of the movable support cylinder 53 and the outer peripheral surface of the fixed support member 56. It is configured.

  In addition, the lower part of the covering protection cylinder 63 is a small diameter part 63 a having a smaller diameter than the upper part, and the inner diameter of the small diameter part 63 a is substantially the same as the large diameter part 53 b of the moving side support cylinder 53. The dimensions are the same. Then, the upper portion of the small diameter portion 63 a of the covering protective cylinder 63 is joined and fixed to the lower end portion of the large diameter portion 53 b of the moving side support tube 53, so that the covering protective tube 63 is fixed to the moving side support tube 53. Has been.

  Further, the lower end side of the covering protective cylinder 63 (the lower end side of the small diameter part 63 a) extends downward from the lower end of the moving side support cylinder 53 to form an extension, and the small diameter part 63 a of the covering protective cylinder 63 is formed. The extension part concentrically covers the fixed-side support cylinder 56 via a predetermined space.

  The cooking utensil temperature detection apparatus of this embodiment is configured as described above, and the outer diameter of the upper end of the covering protective cylinder 63 is smaller than the outer diameter of the flange 53x, and the peripheral portion of the contact body 51 is covered. Since it is configured to protrude outward from the outer periphery of the protective cylinder 63, even when the cooking utensil 2 is spilled, the soup may enter between the contact body 51 and the covering protective cylinder 63. Since it is suppressed and prevented from staying between the contact body 51 and the covering protection cylinder 63 or in the vicinity thereof, maintenance is simplified.

  Further, the upper end portion of the covering protective cylinder 63 is not fixed to the abutting body 51 (specifically, the part of the abutting body 51 that is turned around the collar portion 53x of the moving support cylinder 53), Since the covering protective cylinder 63 and the contact body 51 are kept in contact with each other, heat conduction from the covering protective cylinder 63 to the contact body 51 is suppressed, and the cooking utensil with which the contact body 51 comes into contact. The temperature of 2 (such as the pan bottom) can be accurately detected.

  Further, since the upper end portion of the covering protective cylinder 63 is covered with the contact body 51, even when the tip of the covering protective cylinder 63 has a burr, the covering protective cylinder 63 is mistakenly removed when the user cleans it. There is no risk of injury by touching the upper end portion having 63 burrs, and safety is improved.

  In addition, the peripheral portion of the contact body 51 is in contact with the upper surface of the flange portion 53x of the moving side support cylinder 53, and is folded back so as to extend to the lower surface side beyond the outer peripheral portion of the flange portion 53x. The structure in the vicinity of the flange portion 53x of the movable side support cylinder 53 is folded back so as to wrap around the flange portion 53x, the contact body 51 on the upper surface side of the flange portion 53x, and the lower surface side of the flange portion 53x. Since it has a three-layer structure including the contact body 51 and has a structure with high rigidity and mechanical strength, the position of the cooking tool 2 is shifted in a state where the bottom surface of the cooking tool 2 and the contact body 51 are in contact with each other. Also in this case, it is possible to more effectively suppress the generation of high-frequency metallic sound due to the vibration of the covering protective cylinder 63, and the usability can be improved.

  Further, the lower end side of the covering protection cylinder 63 (the lower end side of the small diameter part 63a) extends downward from the lower end of the moving side support cylinder 53 to form an extension part, and the extension part is concentrically formed in a predetermined space. Since the fixed side support cylinder 56 is covered via the heat effect on the fixed side support member 56, the temperature of the cooking utensil 2 can be detected more accurately.

[Another embodiment]
In the first embodiment, the covering protective cylinder 63 is fixed to the moving side supporting cylinder 53 at the large diameter portion 53b of the moving side supporting cylinder 53, but the lower end portion of the covering protecting cylinder 63 is supported on the moving side support. It is also possible to fix to the small diameter part 53a of the cylinder.

  In such a case, although the structure becomes complicated, the covering protection cylinder 63 and the moving side support cylinder 53 are fixed at a position further away from the contact body 51. And the temperature increase of the heat collecting plate due to heat conduction from the fixed portion between the moving side support cylinder 53 and the temperature of the cooking utensil 2 can be detected more accurately.

  The present invention is not limited to the above embodiment in other respects, and the specific configuration of each member such as a fixed-side support member, a moving-side support tube, an abutment body, a thermistor, and a covering protection tube, Various modifications can be made within the scope of the present invention with respect to the configuration of the cooking appliance to which the temperature detection apparatus for cooking utensils of the invention is applied.

1 Temperature detection device for cooking utensils 2 Cooking utensils (pots, etc.)
4 Insertion hole 5 Burner cap 11 Top plate 12 Gotoku 33 Mixing tube 41 Burner base 51 Contact body (heat collecting plate)
53 Moving side support tube (holder)
53a Small-diameter portion of the moving-side support tube 53b Large-diameter portion of the moving-side support tube 53x Hook of the moving-side support tube 54 Spring 55 Washer 56 Fixed-side support member (shaft)
57 Thermistor (Temperature detection element)
58 Filler 59, 60 Insulating tube 62 Thermistor fixing plate 63 Covering protection tube 63a Small diameter portion of the covering protection tube 64 Tube portion L Length of the small diameter portion of the moving side support tube S Restriction portion

Claims (3)

(a) a fixed-side support member that is fixed to an arbitrary fixing part of the cooking appliance and extends in the vertical direction;
(b) a movable-side support cylinder that is fitted to the outside of the fixed-side support member and supported so as to be movable up and down;
(c) an abutting body that is arranged at the upper end of the movable support cylinder and is configured to always abut against the bottom surface of the cooking utensil by moving up and down following the vertical movement of the cooking utensil;
(d) a thermistor disposed on the lower surface side of the contact body in such a manner as to be thermally coupled to the contact body;
(e) a covering protective cylinder that concentrically covers the moving side support cylinder from the upper end to the vicinity of the lower end through a predetermined space;
The abutting body is configured such that, when seen in a plan view, its peripheral edge protrudes outside the outer periphery of the covering protective cylinder,
The covering protective cylinder is fixed to the outer periphery of the moving support cylinder at a position near the lower end of the moving support cylinder, and the upper end surface of the covering protective cylinder is on the lower surface of the contact body Just abutting, not fixed, and
The temperature detection apparatus for cooking utensils, wherein an upper end surface of the covering protection cylinder is in contact with a lower surface of the contact body in a circumferential direction. At the upper end of the moving side support tube, a collar portion protruding outward is formed, and
A peripheral edge portion of the contact body is in contact with the upper surface of the flange portion of the movable side support cylinder and is folded back so as to extend to the lower surface side beyond the outer peripheral portion of the flange portion. The temperature detection apparatus for cooking utensils according to claim 1 . The covering protection cylinder includes an extension portion extending further downward than a fixed portion fixed to the outer periphery of the moving side support cylinder; and
The temperature detection device for a cooking utensil according to claim 1 or 2 , wherein the extension portion is configured to cover a part of the fixed-side support member concentrically via a predetermined space.

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