JP2013044468A - Temperature detector for cooking utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature detector for a cooking utensil, which has a simple structure and heat resistance, prevents heated soup from getting therein and accurately detects the temperature of the cooking utensil.SOLUTION: The temperature detector for the cooking utensil includes a heat collecting plate 26 to touch the bottom face 18a of the cooking utensil 18, a temperature sensor 30 fixed to the back face of the heat collecting plate 26, a cylindrical holder 34 that accommodates the temperature sensor 30 and a lead wire 32 of the sensor 30 and has the whole periphery of the upper end thereof fixed liquid-tightly to the heat collecting plate 26, a support shaft 22a that supports the heat collecting plate 26 and the holder 34 and is fixed to a cooker 12, a spring member 36 that is installed in the holder 34 and energizes the heat collecting plate 26 to a protruding direction to the upper end of the support shaft 22a, and a conical cylindrical member 24 that is fixed liquid-tightly without gaps to the whole periphery of the lower end 34c of the holder, which is located in a storage part 14a of the cooker 12, and spreads downward from the fixed point to cover the periphery near a boundary between the lower end 34c of the holder and the support shaft 22a.

Description

  The present invention relates to a temperature detection device for cooking utensils that detects the temperature of the bottom surface of a cooking utensil placed on a gas burner of a cooking appliance.

  Conventionally, there has been a cooking utensil temperature detection device that detects that a cooking utensil such as a pan is placed on a cooking device such as a gas table or a gas stove, and further detects the temperature in contact with the bottom of the cooking utensil. Is provided. This type of temperature detection device for cooking utensils has a temperature sensor, which is a temperature sensing element, attached to the inside of a heat collecting member such as metal and shields the heat collecting member so that the hot air of the gas burner does not directly hit the heat collecting member. Some are provided with a cover. The heat insulation cover reduces the temperature detection error on the bottom of the cooking utensil by suppressing the temperature sensor's detection temperature from rising due to heat from the gas burner, and the electronic components and spring members become hotter than necessary and deteriorate. It works to prevent it from becoming easy to do. In addition, there is also one that serves to guide the spilled broth flowing down through the heat collecting member and the like to a predetermined place.

  As a cooking utensil temperature detection device having a conventional heat insulation cover, for example, as disclosed in Patent Document 1, the temperature of the cooking utensil is detected by abutting against the bottom surface of the cooking utensil placed on the cooking utensil. In addition, cooking comprising: a sensor device portion provided so as to be retractable by placing a cooking tool; a support member to which the sensor device portion is movably attached; and a heat insulating cover that covers a side surface of the sensor device portion. There is a temperature detector for appliances. The sensor device unit is provided with a heat collecting plate provided at the upper end portion thereof and contacting the bottom surface of the cooking utensil, a temperature sensor fixed to the back surface of the heat collecting plate, and the temperature sensor and its lead wire. And a cylindrical holder whose entire circumference is liquid-tightly fixed, and the holder is urged in a protruding direction with respect to the support member by a predetermined spring member. Furthermore, the cover has a cylindrical outer shape that concentrically covers the holder from the upper end to the lower end with a predetermined space, and the upper end of the cylinder is folded inward in a U shape to It is fixed in a liquid-tight manner without any gaps, and its cylindrical lower end is open. Boiled simmered juice that flows from the heat collecting plate may flow down on the outer surface of the cover, but the lower end of the cover is wide open so that the broth does not adhere to the lower end of the holder. This prevents the sliding member from entering into the gap between the support member and the support member.

  Moreover, as disclosed in Patent Document 2, the sensor holder has a sensor holder disposed above the center of the gas burner, and a temperature sensor that detects the pan bottom temperature at the top of the sensor holder, and is provided on the outer periphery of the sensor holder. There is a pan bottom temperature detecting device in which a heat insulating cylinder (heat insulating cover) in which a conical cylindrical skirt portion is formed is arranged with a gap, and the sensor holder and the protective cylinder are connected by a connecting spring. This pan bottom temperature detecting device is attached above a hole in the center of the gas burner via a sensor vertical movement spring, and the entire device is exposed above the gas burner. In addition, the skirt part of the heat insulation cylinder is wider toward the bottom, and the size of the lower end is larger than the hole in the center of the gas burner, so that the spilled broth flowing down through the heat insulation cylinder and the skirt part enters the gas stove. It is the structure which prevents.

JP 2008-170038 A Japanese Patent Application Laid-Open No. 7-269871

  In the case of the temperature detection apparatus for cooking utensils of Patent Document 1, there is a problem that the cost of the apparatus increases because the shape of the cover is complicated and the installation is troublesome. In addition, since the upper end of the cover is fixed to the entire circumference of the upper end of the holder without any gaps, hot air that has entered inside from the lower end of the cover stays in the gap between the cover and the holder, and the temperature of the temperature sensor easily rises. There was also a risk that the temperature detection error would increase.

  In addition, the pot bottom temperature detection device of Patent Document 2 has a problem that the simmered broth is guided to the upper surface of the gas stove, making the upper surface of the gas stove and the surface of the gas burner unclean and easily clogging the flame holes of the gas burner. there were. Furthermore, the outer shape of the heat insulation cylinder including the skirt portion becomes very large, which not only increases the cost of the apparatus, but also when the cooking utensil such as a pan is moved, the pan bottom temperature detecting device and the cooking utensil that protrude greatly from the surface of the gas stove are provided. There is a risk of colliding and damaging the pan bottom temperature detecting device, which is not preferable in appearance.

  The present invention has been made in view of the above-described background art, has a simple structure, has heat resistance, can prevent intrusion of boiled juice, and can accurately detect the temperature of cooking utensils. An object of the present invention is to provide an industrial temperature detection device.

  The present invention includes a sensor device that detects the temperature of the cooking utensil when an upper end abuts on a bottom surface of the cooking utensil placed on the cooking utensil, and an inner side of a gas burner of the cooking utensil that is fixed to the cooking utensil. A support member to which the sensor device portion is detachably attached toward the housing portion, and the sensor device portion is provided on the upper end portion and contacts a bottom surface of the cooking utensil, and the heat collection plate. A temperature sensor fixed to the back surface of the plate, a cylindrical holder in which the temperature sensor and its lead wire are accommodated and the entire upper end of the heat collecting plate is fixed in a liquid-tight manner, and the holder provided in the holder A spring member that urges the heat collecting plate and the holder in the protruding direction with respect to the support member portion, and the entire circumference of the lower end portion of the holder located in the accommodating portion of the cooker is liquid-tightly fixed without a gap. In addition, it spreads downward from the fixed part Te is a cooker for temperature detection device and a conical tubular member covering at predetermined space around the vicinity of the boundary between the support member protruding therefrom and the holder lower portion.

  A lower end portion of the holder is formed to have a relatively small diameter, and an attachment portion of the conical cylindrical member is fixed to the lower end portion. Alternatively, the conical cylindrical member may be integrally formed and provided at the lower end of the holder.

  The upper end portion of the holder is formed with a cylindrical end portion opened laterally, and the peripheral edge portion of the heat collecting plate is folded over the entire circumference of the end portion of the holder so as to be in a liquid-tight state over the entire circumference. It is caulked. Alternatively, the sensor fitting portion is press-fitted into the heat collecting plate at the upper end portion of the holder, and the contact plate of the sensor fitting portion and the end portion of the holder are in a liquid-tight state by the peripheral edge portion of the heat collecting plate. It may also be crimped over the entire circumference.

  In addition, the holder has a cylindrical outer shape that concentrically covers the side surface of the holder, and a cylindrical upper end is opened so that boiled juice flowing from the heat collecting plate can flow in, and the cylindrical lower end. Is fixed to the lower end of the holder, and a cover in which a broth discharge hole for discharging the broth that has flowed inward may be provided.

  According to the temperature detection apparatus for a cooking appliance of the present invention, a conical cylindrical member having a simple structure is provided instead of the conventional structure using a heat-proof cover, and the heat supplied from the gas burner to the holder is conical cylindrical. Since heat is quickly radiated through the member, an error in detecting the temperature of the cooking utensil can be kept small. In addition, boiled broth that flows down along the side surfaces of the heat collecting plate and the holder is guided to the conical cylindrical member and does not enter the temperature detection device from the lower end portion of the holder. It is difficult for malfunctions to occur. In addition, since most of the portion including the conical cylindrical member is accommodated in the central accommodating portion of the gas burner and there are few portions exposed to the outside, the design of the entire cooker is not adversely affected.

  Furthermore, it is possible to further improve the temperature detection accuracy of the cooking utensil by adding a predetermined cover to prevent the heat of the gas burner from directly hitting the holder.

It is a schematic diagram which shows the use condition of the cooking appliance which attached the temperature detection apparatus for cooking appliances of 1st embodiment of this invention. It is an expansion longitudinal cross-sectional view of the temperature detection apparatus for cooking appliances of 1st embodiment. It is a schematic diagram which shows the use condition of the cooking appliance which attached the temperature detection apparatus for cooking utensils of 2nd embodiment of this invention. It is an expansion longitudinal cross-sectional view of the temperature detection apparatus for cooking appliances of 2nd embodiment. It is the top view (a) which shows the cover of the temperature detection apparatus for cooking appliances of 2nd embodiment, and the partial cutaway longitudinal view (b) seen from the front. In the expanded longitudinal cross-sectional view (a) which shows the attachment method of the heat collecting plate and sensor fitting part of the temperature detection apparatus for cookware of 3rd embodiment, and the expanded longitudinal cross-sectional view (b) which shows those fitting states is there. It is a partial expanded longitudinal cross-sectional view of the temperature detection apparatus for cooking appliances of 3rd embodiment. Enlarged longitudinal cross-sectional view (a) which shows the other example of the attachment method of the heat collecting plate of the temperature detection apparatus for cookware of 3rd embodiment, and a sensor fitting part, and an enlarged longitudinal cross-sectional view which shows those fitting states (B).

  Hereinafter, a first embodiment of a temperature detection apparatus for cooking utensils according to the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the cooking device temperature detection device 10 of this embodiment is disposed in a housing portion 14 a formed inside a gas burner 14 that is annularly provided in a cooking device 12 such as a gas table. It is attached above 14a so that the upper end part of the sensor apparatus part 16 mentioned later protrudes. When the cooking utensil 18 such as a pan is placed on the virtues 20, the bottom surface 18a of the cooking utensil 18 comes into contact with the upper end portion of the sensor device unit 16, and the sensor device unit 16 is pressed downward, and the housing unit 14a. It is provided inside so that it can be retracted.

  As shown in FIGS. 1 and 2, the cooking appliance temperature detection device 10 includes a sensor device portion 16, a support member 22, and a conical cylindrical member 24. The support shaft 22a, which is the main body of the support member 22, is vertically installed and fixed by the attachment portion 12a of the cooking device 12, and the sensor device portion 16 is slidably attached to the upper end portion of the support shaft 22a. . A conical cylindrical member 24 is attached to the lower end portion of the sensor device portion 16. Here, FIG. 2 shows a state where the sensor device unit 16 is not pressed by the cooking utensil 18.

  The sensor device portion 16 is provided with a heat collecting plate 26 made of a stainless steel plate in contact with and in surface contact with the bottom surface 18a of the cooking utensil 18 at its upper end, and a stainless steel cylinder or the like on the back surface of the heat collecting plate 26. The sensor fitting portion 28 is fixed. The sensor fitting portion 28 has an upper end opened in a flange shape, a flange-like portion welded to the back surface of the heat collecting plate 26, and a lower end opened. A temperature sensor 30 such as a thermistor is closely fitted to the sensor fitting portion 28, and an end portion of the temperature sensor 30 is in contact with the back surface of the heat collecting plate 26.

  The heat collecting plate 26 is fixed to an upper end portion 34 a of a cylindrical holder 34 that houses the temperature sensor 30 and its lead wires 32. The upper end portion 34a of the holder 34 is opened in a flange shape, and the peripheral edge portion 26a of the heat collecting plate 26 is folded over the entire circumference of the flange-like portion of the upper end portion 34a of the holder 34 so as to be in a liquid-tight state on the circumference. It is crimped over the entire circumference. A lower portion 34c having a slightly narrower diameter on the lower side of the step 34b is formed in a lower portion of the holder 34.

  A spring member 36 that is a coil spring that urges the heat collecting plate 26 and the holder 34 in the protruding direction with respect to the support shaft 22a is housed inside the holder 34. The spring member 36 has an upper end portion 36 a that urges the back surface side of the heat collecting plate 26, and a lower end portion 36 b that is in contact with the stopper 22 b of the support member 22 that can relatively slide in the holder 34. The stopper 22b is formed in an annular shape, and the tip of the support shaft 22a is fixed to the central through hole. Usually, the stopper 22b is locked to the step 34b in the lower portion of the holder 34 by the elastic force of the spring member 36. ing. When the sensor device portion 16 is pressed downward, the stopper 22b moves away from the step portion 34b and slides in the holder 34. The lead wire 32 of the temperature sensor 30 is slidably inserted inside the stopper 22b and the support shaft 22a.

  A conical tubular member 24 is attached to the lower end 34 c of the holder 34 on the outside. The conical cylindrical member 24 has a substantially cylindrical mounting portion 24 a and an expanded portion 24 b having one end widened in a trumpet shape, and the mounting portion 24 a is a liquid-tight gap around the entire lower end 34 c of the holder 34. The spread portion 24b gradually spreads downward, and the support shaft 22a covers the periphery of the boundary portion protruding from the holder 34 with a predetermined space therebetween. The size of the expanded portion 24b is set so that the expanded portion 24b does not contact the inner wall of the accommodating portion 14a when the conical cylindrical member 24 moves up and down in the accommodating portion 14a of the gas burner 14. The conical cylindrical member 24 is made of ferritic stainless steel having high thermal conductivity. In addition, the heat dissipation effect described later can be further enhanced by using a material having higher thermal conductivity such as aluminum or copper subjected to corrosion resistance.

  Next, operation | movement and an effect | action of this temperature detection apparatus 10 for cookware are demonstrated. As shown in FIG. 1, when the support shaft 22 a is fixed to the attachment portion 12 a of the cooking device 12 and the cooking tool 18 is brought close to the gas burner 18 from above, the cooking device temperature detection device 10 is placed on the bottom surface 18 a of the cooking tool 18. The heat collecting plate 26 contacts and the sensor device unit 16 slides downward. At this time, the holder 34 together with the heat collecting plate 26 is retracted downward against the spring member 36, and the cooking utensil 18 is stopped in a state where it is placed on the virtues 20.

  In this state, cooking by the cooking utensil 42 is performed, and the temperature sensor 30 detects the temperature of the bottom surface 18 a of the cooking utensil 18. At this time, heat from the gas burner 14 directly hits the side surface of the holder 34, but this heat is radiated from the front and back surfaces of the widened portion 24 b of the conical cylindrical member 24 through the holder 34 to the temperature sensor 30. The influence of is suppressed small.

  Further, when boiling occurs during cooking, the boiled juice that has traveled along the side surface of the cooking utensil 18 flows to the heat collecting plate 26 of the sensor device unit 16. In this case, the broth flows from the heat collecting plate 26 to the side surface of the holder 34, is guided to the outside by the conical cylindrical member 24, and does not enter the gap between the holder 34 and the support shaft 22 a. It flows down to a boiled juice collection unit (not shown). Further, since the broth does not adhere to the side surface of the support shaft 22a, the broth does not adhere to the lead wire 32 through the support shaft 22a.

  As described above, the cooking utensil temperature detection device 10 is provided with the conical cylindrical member 24 that has a simple structure and can be easily attached. Even if the heat from the gas burner 14 directly hits the side of the holder 34, Is quickly dissipated, so that the error in detecting the temperature of the cooking utensil 18 is reduced. Further, since the spilled broth flowing down along the side surfaces of the heat collecting plate 26 and the holder 34 does not enter the gap between the holder 34 and the support shaft 22a from the lower end 34c of the holder 34, etc., the sensor device portion for the support shaft 22a 16 sliding failure is unlikely to occur. Furthermore, since the broth does not adhere to the lead wire 32 through the support shaft 22a, the sliding between the support shaft 22a and the lead wire 32 is not hindered. Further, the lower end portion 34c of the holder 34 is formed with a diameter smaller than that of the holder 34, and the conical cylindrical member 24 is fixed to the lower end portion 34c in a liquid-tight manner without any gaps. The heat conduction to the conical tubular member 24 is good, and the boiled juice flowing down the holder 34 does not adhere to the end of the conical tubular member 24 and harden. In addition, since most of the portion including the conical cylindrical member 24 is hidden in the inside 14a of the gas burner 14 and only a small portion with the heat collecting plate 26 is exposed to the outside, the design of the cooker 12 as a whole is poor. There is no impact.

  Next, 2nd embodiment of the temperature detection apparatus for cooking appliances of this invention is described based on FIGS. Here, the same configurations as those of the cooking utensil temperature detection apparatus 10 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In addition to the configuration of the cooking utensil temperature detection device 10 described above, the cooking utensil temperature detection device 40 of the second embodiment is provided with a cover 42 that covers the side surface of the holder 34, and the other configurations are the same. It is.

  As shown in FIG. 3, the cooking device temperature detection device 40 is disposed in the housing portion 14 a in the center of the gas burner 14 of the cooking device 12, and when the cooking utensil 18 is placed on the virtues 20, the upper end of the sensor device portion 16. The bottom surface 18a of the cooking utensil 18 comes into contact with the portion, and the temperature sensor 30 detects the temperature of the bottom surface 18a.

  As shown in FIGS. 4 and 5, the cover 42 has a cylindrical outer shape and covers the entire side surface of the holder 34. The cover 42 has an upper end 42 a that is open and is positioned slightly below the surface of the heat collecting plate 26, and an annular space 42 b is formed between the cover 42 and the periphery of the heat collecting plate 26. This space 42b is wide enough to allow spilled boiled juice to flow. The lower end portion 42 c of the cover 42 is narrowed to be slightly narrowed inward, and is fixed to the upper side surface of the step portion 34 b of the holder 34. At the bottom of the narrowed portion of the lower end portion 42c, a broth discharge hole 44 is formed so that the broth flowing in from the space 42b flows out.

  The operation and action of the cooking utensil temperature detection device 40 are the same as those of the cooking utensil temperature detection device 10 described above, and further, by preventing the heat from the gas burner from directly hitting the side surface of the holder 34, The 18 temperature detection errors can be significantly reduced.

  Next, a third embodiment of the temperature detection apparatus for cooking utensils according to the present invention will be described with reference to FIGS. Here, the same configurations as those of the cooking utensil temperature detection apparatus 10 of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the temperature detection device 50 for cooking utensils of the third embodiment, a stainless steel sensor fitting portion 52 provided on the back surface of the heat collecting plate 26 that contacts the bottom surface of the cooking utensil is fitted and fixed to the heat collecting plate 26. It is what has been.

  As shown in FIG. 6, the sensor fitting portion 52 is fixed in a tapered shape in which the peripheral edge portion 26a of the heat collecting plate 26 is opened outward, and the sensor fitting portion 52 is fitted from the opening side of the peripheral edge portion 26a. It is something to be combined. The contact plate 52 a of the sensor fitting portion 52 is formed in a disk shape having an outer diameter slightly larger than the inner diameter of the inner bottom surface of the heat collecting plate 26, and the contact plate 52 a of the sensor fitting portion 52 is formed inside the heat collecting plate 26. Fit so that it press fits into the bottom. Thereafter, when the holder 34 is attached, as shown in FIG. 7, the peripheral edge portion 26 a of the heat collecting plate 26 is folded over the entire circumference of the flange-like portion of the upper end portion 34 a of the holder 34 to contact the sensor fitting portion 52. The plate 52a is finished with caulking over the entire circumference in a liquid-tight state together with the peripheral edge of the plate 52a.

  The cooking device temperature detection device 50 of this embodiment also has the same effect as that of the first embodiment, and the contact surface 52a of the sensor fitting portion 52 is fixed to the heat collecting plate 26 by press-fitting. There are no weld marks as in the case of welding. As a result, the heat collecting plate and the sensor fitting portion can be finished cleanly as if they were cut out from an integral metal, and the cost can be kept low.

  Further, as shown in FIG. 8, the sensor fitting portion 52 is fixed so that the sensor fitting portion 52 can be fitted from the opening side of the peripheral portion 26a of the heat collecting plate 26, and the base end portion of the peripheral portion 26a. Protrusions 26 b formed by opening the contact plate 52 a of the sensor fitting portion 52 from the bottom surface of the heat collecting plate 26 in the vicinity may be provided. The protrusion 26b is formed so as to protrude inwardly or entirely around the peripheral edge 26a, and is provided so as to hold the contact plate 52a. Then, the contact plate 52a of the sensor fitting portion 52 is fitted so as to be press-fitted into the inner bottom surface of the heat collecting plate 26, and then the peripheral portion 26a of the heat collecting plate 26 is attached to the holder 34 when the holder 34 is attached. It is folded over the entire circumference of the flange-like portion of the upper end portion 34a, and finished by caulking over the entire circumference on the circumference together with the peripheral edge of the contact plate 52a of the sensor fitting portion 52. Also in this example, the same effect as described above can be obtained. In addition, the temperature detection apparatus for cooking utensils of the present invention is not limited to the above embodiment, and the holder and the conical cylindrical member may be integrally formed, whereby heat from the holder to the conical cylindrical member is formed. Conduction is improved and heat dissipation performance is improved. In addition, the shape of the holder or cover can be set as appropriate as long as the same operation and action as in the above embodiment can be realized.

10, 40, 50 Cooking device temperature detection device 12 Cooker 12a Mounting portion 14 Gas burner 14a Housing portion 14b Flame hole 16 Sensor device portion 18 Cooking tool 18a Bottom surface 22 Support member 22a Support shaft 22b Stopper 24 Conical cylindrical member 24a Mounting portion 24b Spreading portion 26 Heat collecting plate 26a Peripheral portion 28, 52 Sensor fitting portion 30 Temperature sensor 32 Lead wire 34 Holder 34a Upper end portion 34b Step portion 34c Lower end portion 36 Spring member 42 Cover 42a Upper end portion 42b Space 42c Lower end portion 44 Boiled juice Discharge hole

Claims (6)

A sensor device that detects the temperature of the cooking utensil by contacting the upper end of the cooking utensil placed on the cooking utensil; and
A support member fixed to the cooker, and attached to the storage unit inside the gas burner of the cooker so that the sensor device unit can be retracted;
The sensor device unit accommodates the heat collecting plate provided at the upper end and abutting the bottom surface of the cooking utensil, a temperature sensor fixed to the back surface of the heat collecting plate, the temperature sensor and its lead wire, and the collecting device. A cylindrical holder in which the entire upper end portion of the heat plate is liquid-tightly fixed to the heat plate, and a spring member provided in the holder and biasing the heat collecting plate and the holder in a protruding direction against a portion of the support member The support member is fixed in a liquid-tight manner without gaps around the lower end of the holder located in the storage portion of the cooker, and extends downward from the fixed portion, and protrudes from the holder lower end. And a conical cylindrical member that covers the vicinity of the boundary with a predetermined space.   The temperature detecting device for a cooking appliance according to claim 1, wherein a lower end portion of the holder is formed to have a relatively small diameter, and an attachment portion of the conical cylindrical member is fixed to the lower end portion.   The temperature detection apparatus for cooking utensils according to claim 1, wherein the conical cylindrical member is integrally formed at a lower end portion of the holder.   The upper end portion of the holder is formed with a cylindrical end portion opened laterally, the peripheral edge portion of the heat collecting plate is folded over the entire upper end portion of the holder, and is in a liquid-tight state over the entire periphery. The temperature detecting device for cooking utensils according to claim 1, wherein the temperature detecting device is caulked.   The sensor fitting portion is press-fitted into the heat collecting plate at the upper end portion of the holder, and the contact plate of the sensor fitting portion and the end portion of the holder are all in a liquid-tight state by the peripheral edge portion of the heat collecting plate. The temperature detection apparatus for cooking utensils according to claim 1, wherein the temperature detection apparatus is crimped over a circumference.   The holder has a cylindrical outer shape that covers the side of the holder concentrically with a predetermined space, and the cylindrical upper end is opened to allow inflow of boiled juice flowing from the heat collecting plate, and the cylindrical lower end is The temperature detection apparatus for cooking utensils according to any one of claims 1 to 5, further comprising a cover that is fixed to the lower end of the holder and has a boiled discharge hole that discharges the boiled broth that has flowed inside.

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