JP2015094562A - Temperature detection device for heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature detection device for heating cooker that can accurately detect that a body to be heated is placed in a heating cooker.SOLUTION: A temperature detection device for heating cooker includes: a support 10 stood in a fixed state in a heating cooker; a lifting body 20 which is freely lifted to be pressed down as a bottom part of a body to be heated which is placed on a placement part of the heating cooker abuts, and supported by an upper end part of the support while energized to return to the upper side; and heated body detecting means of detecting the body to be heated is placed on the placement part. The lifting body 20 includes temperature detecting means 30 of detecting the temperature of the body to be heated, and is provided with a magnet 35, and the support 10 is formed of a ferromagnetic body. The support 10 is provided with a magnet approach part 15 that the magnet approaches as the lifting body moves and a detection part 16 in a region apart from the magnet approach part 15, and the heated body detecting means is a magnetism detecting sensor 50 capable of detecting magnetism, and provided at the detection part 16.

Description

  As for this invention, it is raised and lowered so that it may be pushed down, when the support body standingly fixed to a cooking-by-heating machine and the bottom part of the to-be-heated material mounted in the mounting part of the above-mentioned cooking-by-heating machine contact | abut. An elevating body supported at the upper end of the support body in a state of being freely urged and returned upward, and a heated object detection means for detecting the loading of the heated object on the mounting portion. Further, the present invention relates to a temperature detection device for a heating cooker, in which a temperature detecting means for detecting the temperature of the object to be heated is provided at a contact portion where the lifting body contacts the object to be heated.

  As a conventional temperature detection device for a heating cooker, the following Patent Document 1 describes as an elevating body that moves downward in contact with an object to be heated by mounting the object to be heated on the mounting portion of the heating cooker. And a thermistor as a temperature detecting means for detecting the temperature of the object to be heated is provided at a contact portion where the cylinder contacts the object to be heated. A temperature detection device for a cooker is disclosed.

  In addition, in this temperature detection device for a heating cooker, a thermistor lead wire connected to the thermistor is movably inserted into the support pipe, and the thermistor lead wire is magnetically detected as an object to be heated. A switch is provided. On the other hand, a magnet is provided at a predetermined position on the outer periphery of the support pipe. Along with the downward movement of the cylinder provided with the thermistor, the magnetic switch provided on the thermistor lead wire moves in the support pipe and is provided at a predetermined position on the outer periphery of the support pipe. By detecting the magnetism of the magnet close to the magnet, the mounting of the object to be heated on the mounting portion of the cooking device is detected.

JP 2006-034783 A

  However, the thermistor lead wire used in the above-mentioned Patent Document 1 is usually configured such that a metal wire is covered with a synthetic resin or the like, and has flexibility. Therefore, when the thermistor lead wire moves in the support pipe due to the downward movement of the cylinder accompanying the mounting of the object to be heated in the cooking device, the thermistor lead wire is buckled in the support pipe. The magnetic switch provided at the position does not move to the position where the magnetism of the magnet provided at a predetermined position on the outer periphery of the support pipe is detected, and there is a problem that the loading of the object to be heated on the heating cooker cannot be detected. There is a fear. Such a defect is particularly likely to occur when the support pipe is bent in an L shape because the thermistor lead wire buckles at the bent portion.

  The present invention has been made paying attention to such a point, and its purpose is to provide a temperature detection device for a heating cooker that can accurately detect the mounting of an object to be heated on the mounting portion of the heating cooker. It is to provide.

In order to achieve this object, a temperature detection device for a heating cooker according to the present invention,
A support that is fixedly installed on the cooking device;
The upper end portion of the support body can be moved up and down and returned to the upper side so as to be pushed down as the bottom portion of the object to be heated placed on the placement portion of the heating cooker comes into contact. A lifting body supported by
A heated object detecting means for detecting the loading of the heated object on the placement unit,
A temperature detecting device for a cooking device, wherein a temperature detecting means for detecting a temperature of the heated object is provided at a contact portion where the lifting body contacts the heated object, the first characteristic configuration is
A magnet is provided on the lifting body,
The support is formed of a ferromagnetic material, and a magnet proximity portion where the magnet is brought close to the support due to the movement of the elevating body by mounting the object to be heated, and a detection portion which is separated from the magnet proximity portion. Provided,
The heated object detection means is a magnetic detection sensor capable of detecting magnetism, and the magnetic detection sensor is provided in the detection unit.

  According to the 1st characteristic structure of the temperature detection apparatus for heating cookers which concerns on this invention, by raising a to-be-heated object in the mounting part of a heating cooker, a raising / lowering body is pushed down by a to-be-heated object, and a raising / lowering body Since the magnet provided on the magnet is close to the magnet proximity portion of the support body, the support body formed of a ferromagnetic body can be strongly magnetized by the magnet. As a result, the detection part that is separated from the magnet proximity part is also magnetized, so that the magnetic detection sensor detects the magnetic field of the detection part to detect that the object to be heated is placed on the placement part. Can do.

  In other words, the support fixed to the heating cooker is magnetized by a magnet and the magnetic detection sensor detects the magnetic field of the support to detect the placement of the object to be heated on the placement part. It is not necessary to provide means for transmitting body motion between the lifting body and the magnetic detection sensor, and the support body can be magnetized by the magnetic force of a stable magnet. The mounting of the object to be heated on the placing portion of the cooking device can be accurately detected.

In addition to the first feature configuration, the second feature configuration of the temperature detection device for a heating cooker according to the present invention is as follows.
In the elevating body, the magnet is provided at a position below the contact portion.

  According to the 2nd characteristic structure of the temperature detection apparatus for the said cooking-by-heating machine, since the magnet is provided in the position below the raising / lowering body, it makes a magnet approach the support body provided below the raising / lowering body easily. Can do. It is possible to suppress the magnet from being heated and the magnetic force of the magnet from being lowered by heat transfer from the object to be heated that is in contact with the contact body.

The third characteristic configuration of the temperature detection device for a heating cooker according to the present invention is in addition to the first to second characteristic configurations described above,
A flat surface portion that extends in a direction orthogonal to the ascending / descending direction of the elevating body is provided at one end that is an end portion on the elevating body side of the support body,
The magnet proximity portion is provided in the plane portion, and a biasing member that biases the lift body upward is provided between the plane portion and the lift body.

  According to the 3rd characteristic structure of the temperature detection apparatus for the said heating cooker, since the plane part which spreads in the direction orthogonal to the raising / lowering direction of a raising / lowering body is provided, a raising / lowering body can be stably urged | biased upwards. it can. In addition, since the magnet proximity portion is provided in the flat portion, the support can be strongly magnetized.

In addition to the first to third feature configurations described above, the fourth feature configuration of the temperature detecting device for a cooking device according to the present invention is as follows.
The support is formed of a cylinder;
A lead wire connected to the temperature detecting means is provided in the cylindrical body,
The detector is provided at the outer peripheral surface of the cylindrical body.

  According to the fourth characteristic configuration of the temperature detecting device for the cooking device, the support body is formed of a cylindrical body, and thus the lead wire connected to the temperature detecting means is disposed in the cylindrical body to protect the lead wire. be able to. Moreover, the space which attaches a magnetic detection sensor is securable by providing a detection part in the outer peripheral surface of a cylinder.

In addition to the first to fourth feature configurations described above, the fifth feature configuration of the temperature detection device for a heating cooker according to the present invention includes:
The material forming the support is SUS420.

  According to the 5th characteristic structure of the temperature detection apparatus for the said heating cooker, a support body can be strongly magnetized by the magnet provided in the raising / lowering body by using SUS420 which is a ferromagnetic material.

Sectional drawing which shows the temperature detection apparatus for heating cookers in the state where the to-be-heated material is not mounted Sectional drawing which shows the temperature detection apparatus for heating cookers in the state by which the to-be-heated object was mounted Cross-sectional perspective view showing the inside of the lifting body in the state (a) where the object to be heated is not mounted and the state (b) where it is mounted Schematic configuration diagram of a gas stove equipped with a temperature detection device for a cooking device Schematic configuration diagram of a gas burner equipped with a temperature detection device for a cooking device

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the gas stove C equipped with the temperature detection device S for a heating cooker according to the present invention will be briefly described.
As shown in FIG. 4, the gas stove C serving as a heating cooker is configured as a built-in type, and has three openings arranged in the left-right direction on the top plate 2 provided on the upper portion of the rectangular box-shaped casing 1 opened upward. 5 (see FIG. 5), annular gas burners 4 are arranged in the respective openings 3, and the five virtues 5 (places such as pans, not shown) are placed corresponding to the respective gas burners 4. An example of a mounting portion is detachably provided. Further, a grill 6 is provided at a substantially center in the left-right direction in the casing 1 and a gas burner (not shown) for heating the inside of the grill 6 (not shown) of the grill 6 is provided. A grill exhaust port 7 is provided at the rear side of the top plate 2.
A grill exhaust cylinder 8 (see FIG. 5) that guides the exhaust gas in the grill to the grill exhaust port 7 is provided at a substantially center in the left-right direction in the casing 1.

  Each of the three gas burners 4 has a different combustion amount. For example, in the front view, the left side (left side in the drawing of FIG. 4), the right side (right side in the drawing of FIG. 4), the center in the left-right direction and the back side. The combustion amount is large in order. Therefore, the left gas burner 4 is referred to as a large thermal burner 41, the central gas burner 4 is referred to as a small thermal burner 42, and the right gas burner 4 is referred to as a standard burner 43. As shown in FIG. 5, the small thermal power burner 42 is disposed above the grill exhaust pipe 8.

  Since the three gas burners 4 are well-known, they will be described briefly without detailed description and illustration. As shown in FIG. 5, an annular burner having a large number of flame holes (not shown) on the outer periphery. A main body 4a, a mixing pipe 4b for supplying a mixture of gas fuel and air to the burner main body 4a, a gas nozzle 4c for supplying gas fuel to the mixing pipe 4b, and the like are provided.

For each of the three gas burners 41 to 43, a temperature detection device (hereinafter, simply referred to as a temperature detection device) S for a cooking device is provided. Similarly, the three temperature detection devices S provided in each of the gas burners 41 to 43 respectively have a heated object temperature detecting function for detecting the temperature of the heated object placed on the five virtues 5 and five virtues 5. An object to be heated detection function is provided for detecting whether or not an object to be heated is placed thereon.
As for the temperature detection device S for the small thermal power burner 42, since the installation space in the vertical direction is narrow due to the arrangement above the grill exhaust pipe 8, the support 10 of the temperature detection device S for the small thermal power burner 42 is In order to avoid interference with the grill exhaust cylinder 8, it is bent above the grill exhaust cylinder 8, is generally L-shaped, and is fixed above the grill exhaust cylinder 8. On the other hand, the support 10 of the temperature detection device S provided in the large thermal power burner 41 and the standard burner 43 has no grill exhaust tube 8 below, and has a large installation space in the vertical direction. It is fixed to the bottom of the gas stove C.

Hereinafter, based on FIG.1 and FIG.2, the temperature detection apparatus S provided in the small thermal power burner 42 is mentioned as an example and demonstrated as the temperature detection apparatus S which concerns on this application.
FIG. 1 is a longitudinal sectional view of the temperature detection device S in a state where the object to be heated is not placed on the virtues 5 and the lifting body 20 is located at the upper limit position, and FIG. Is a vertical cross-sectional view of the temperature detection device S in a state in which is mounted on the virtues 5 and the elevating body 20 is lowered.

  The temperature detection device S can freely move up and down so that it is pushed down as the support 10 standing in a fixed manner on the gas stove C and the bottom of the object to be heated placed on the virtues 5 of the gas stove C abut. In addition, the elevating body 20 supported on the upper end of the support 10 in a state of being returned and biased upward, and the magnetic detection sensor 50 as a heated object detecting means for detecting the loading of the heated object on the virtues 5 And.

  The lifting body 20 is provided with a temperature detecting means 30 for detecting the temperature of the object to be heated, and a magnet 35 for magnetizing the supporting body 10 in the vicinity of the supporting body 10 when the lifting body 20 is lowered. On the other hand, the support body 10 is formed of a ferromagnetic body, and the support body 10 includes a magnet proximity portion 15 to which the magnet 35 is close due to the movement of the elevating body 20 due to mounting of an object to be heated, and a portion that is separated from the magnet proximity portion 15. And a detection unit 16. And the magnetic detection sensor 50 which detects that the support body 10 is magnetized is provided in the detection part 16. FIG.

Next, the lifting body 20 will be described in detail with reference to FIGS.
The elevating body 20 includes a two-stage cylindrical main body 22 composed of a small-diameter portion and a large-diameter portion, an abutting portion 21 that closes an end opening on the large-diameter portion side of the main-body portion 22, and an abutting portion thereof. 21 is provided with a cylindrical sensor support portion 23 with a flange that is fixed in a state of being applied to the back surface of 21.
The lead wire 32 of the temperature detecting means 30 is covered with a heat-resistant tube 33 having heat resistance. Incidentally, as the heat-resistant tube 33, for example, a glass braided tube is used.
Then, the heat detecting resin (not shown) is filled in a state in which the detection unit 31 of the temperature detection unit 30 is applied to the back surface of the contact unit 21 of the elevating body 20 and stored in the sensor support unit 23. The detection unit 31 is provided so as to be able to detect the temperature of the contact portion 21 of the elevating body 20.

  And the detection part 31 is in the state which has arrange | positioned in the support body 10 in the state which the lead wire 32 extended outside the edge part on the opposite side to the side in which the lift body 20 was supported in the support body 10, and the raising / lowering body 20 is. The temperature of the abutting portion 21 with which the bottom of the object to be heated abuts can be detected.

  A connector 34 for connecting to a control unit (not shown) for controlling the operation of the gas stove C is connected to the end of the lead wire 32. By connecting this connector 34 to the control unit, the detection unit 31 is connected. The detection information is input to the control unit.

As the magnet 35 for magnetizing the support 10, a ferrite magnet, a neodymium magnet, or the like is used. The magnet 35 is formed in a hollow cylindrical shape and is held by a magnet holder 36. The magnet holder 36 is formed in a cylindrical shape, and an upper end portion thereof is a lower surface on the outer peripheral side of the flange portion of the sensor support portion 23 and is connected to the inside of the coil spring 25. A protrusion 36a that protrudes radially outward is provided on the lower side of the magnet holder 36 in an annular shape along the circumferential direction, and a flange 36b is provided at the lower end. The annular protrusion 36a and the flange 36b The magnet 35 is attached to the inner peripheral portion of the magnet holder 36 with a hollow cylindrical magnet 35 fitted therebetween. Thus, the magnet 35 is provided at a lower position away from the contact portion 21.
Further, the lead wire 32 covered with the heat-resistant tube 33 connected to the temperature detecting means 30 is provided in a state of movably penetrating the hollow portion of the magnet 35.

The support 10 is formed of a cylindrical body 14, and a lead wire 32 connected to the temperature detection means 30 is provided in the cylindrical body 14 in a state where the heat-resistant tube 33 is covered. Further, a flat surface having an outer diameter that is larger than the inner diameter of the small-diameter portion of the main body portion 22 of the elevating body 20 and slightly smaller than the inner diameter of the large-diameter portion at the end portion (upper end portion) on the distal end side portion 11 side of the support body 10. A ring-shaped spring receiving portion 17 (an example of a flat surface portion) is formed at the end portion of the cylindrical body 14 in a state where the ring-shaped spring receiving portion 17 spreads in a direction orthogonal to the lifting direction of the lifting body 20. The upper surface of the spring receiving portion 17 is a planar magnet proximity portion 15 that extends in a direction perpendicular to the vertical direction in which the elevating body 20 moves up and down.
And the raising / lowering body 20 is prevented by the magnet proximity | contact part 15 in the step part of the small diameter part and large diameter part in the main-body part 22, and between the back surface of the contact part 21 and the spring receiving part 17 between. In the state where the coil spring 25 is interposed in a compressed state, it is supported by the end portion of the support body 10 on the tip side portion 11 side. As a result, the elevating body 20 is supported on the upper end portion of the front end side portion 11 of the support body 10 in a state where it can be raised and lowered and returned to the upper side by the coil spring 25.

Further, the proximal side portion 12 of the support 10 is configured as a detection unit 16. The detection unit 16 is a part of the outer peripheral surface of the cylindrical body 14. And the material of the cylinder 14 which comprises the support body 10 is made into a ferromagnetic material, for example, is set to SUS420. Thereby, the support body 10 is strongly magnetized by the proximity of the magnet 35 to the magnet proximity section 15 as the elevating body 20 descends, and the magnetism of the support body 10 can be detected by the detection section 16.
Conventionally, SUS304 is used as the material of the support, but since SUS304 is a non-magnetic material and does not magnetize, it cannot be used as the material of the support 10 of the temperature detection device S according to the present application. .

  The magnetic detection sensor 50 is provided close to the detection unit 16 in a state of facing the detection unit 16 of the cylindrical body 14. The magnetic detection sensor 50 detects the magnetic field of the support body 10 magnetized by the proximity of the magnet 35 as the elevating body 20 descends in the detection unit 16. That is, when the magnetic detection sensor 50 detects the magnetic field of the detection unit 16, for example, the magnetic detection sensor 50 includes a switch unit (not shown) that switches from an off state to an on state. A lead wire 51 that outputs a signal indicating an on / off state of the switch unit is connected to the connector 34, and the on / off state of the switch unit of the magnetic detection sensor 50 is input to the control unit.

  And in the state (FIG.1 and FIG.3 (a)) in which the raising / lowering body 20 rose to the upper limit position and the magnet 35 and the magnet proximity | contact part 15 were spaced apart, the support body 10 is not magnetized by the magnet 35, but a magnetic detection sensor. In a state where 50 is in an off state in which no magnetic field is detected and the elevating body 20 is lowered and the magnet 35 and the magnet proximity portion 15 are close to each other (FIGS. 2 and 3B), the support 10 is magnetized by the magnet 35. Thus, the magnetic detection sensor 50 is configured to be switched between an on state and an off state in accordance with the position of the lifting body 20 in the vertical direction in an on state where the magnetic detection sensor 50 detects a magnetic field.

  As shown in FIG. 5, the temperature detection device S configured as described above is such that the distal end side portion 11 of the support body 10 is in a standing posture at the substantially central portion of the annular burner body 4 a and is heated by the five virtues 5. In a state where no object is placed, the abutting portion 21 of the lifting body 20 protrudes from the upper surface of the virtues 5 and the proximal side portion 12 of the support 10 is moved by a sensor fixture (not shown). By being fixed above the grill exhaust cylinder 8, it is provided in the casing 1 of the gas stove C.

When the object to be heated is not placed on the virtues 5, the elevating body 20 is raised to the upper limit position by the urging force of the coil spring 25, and the magnet 35 and the support body 10 are separated from each other. Therefore, the support body 10 is not magnetized by the magnet 35, the magnetic detection sensor 50 is turned off, and the object to be heated is not placed on the virtues 5 by the control unit to which the connector 34 is connected. The position is detected.
When the object to be heated is placed on Gotoku 5, the bottom of the object to be heated comes into contact with the contact part 21 of the lifting body 20, and the lifting body 20 descends against the urging force of the coil spring 25. Thus, the magnet 35 is in a state of being close to the support 10. Therefore, the support body 10 is magnetized by the magnet 35, the magnetic detection sensor 50 is turned on, and the heated object placement state in which the heated object is placed on the virtues 5 is detected by the control unit.
When the object to be heated is placed on Gotoku 5 in such a manner, when the object to be heated is lifted and removed from Gotoku 5, the lifting body 20 returns to the upper limit position by the urging force of the coil spring 25, and the magnet again Since 35 and the support 10 are separated from each other, the magnetic detection sensor 50 is turned off to detect the non-heated object placement state.
Therefore, the magnetic detection sensor 50 can accurately detect the positional displacement due to the lifting and lowering of the lifting body 20, and thus can accurately detect whether or not the object to be heated is placed on the virtues 5.

[Another embodiment]
Finally, another embodiment of the present invention will be described. Note that the configuration of each embodiment described below is not limited to being applied independently, and can be applied in combination with the configuration of other embodiments as long as no contradiction occurs.
(B) In the above embodiment, the temperature detection device S having the L-shaped support body 10 is used in the small thermal power burner 42. However, the temperature detection device S having the linear support body 10 is not limited thereto. Can also be used.

(B) In the above embodiment, the support body 10 is formed of the cylindrical body 14, but the support body 10 may be formed of a solid columnar body.

(C) In the above embodiment, the magnetic detection sensor 50 includes a normally open switch that switches from an off state to an on state when a magnetic field is detected. However, the present invention is not limited to this, and an on state is detected when a magnetic field is detected. A normally closed switch for switching from the off state to the off state may be provided.

(D) In the above-described embodiment, the magnetic detection sensor 50 is provided in the vicinity of the detection unit 16 of the cylindrical body 14, but not limited thereto, the magnetic detection sensor 50 is fixed to the detection unit 16 of the cylindrical body 14. May be provided.

(E) The temperature detection device S for a heating cooker of the present invention can be used in various heating cookers such as an electric stove other than the gas stove C exemplified in the above embodiment.

  As described above, it is possible to provide a temperature detection device for a heating cooker that can accurately detect the mounting of an object to be heated on the heating cooker.

5 Placement part 10 Support body 14 Cylinder 15 Magnet proximity part 16 Detection part 17 Spring receiving part (plane part)
21 Contact part 20 Lifting body 25 Biasing member 30 Temperature detection means 32 Lead wire 35 Magnet 50 Magnetic detection sensor (object to be heated detection means)
C Heating cooker S Temperature detector

Claims (5)

A support that is fixedly installed on the cooking device;
The upper end portion of the support body can be moved up and down and returned to the upper side so as to be pushed down as the bottom portion of the object to be heated placed on the placement portion of the heating cooker comes into contact. A lifting body supported by
A heated object detecting means for detecting the loading of the heated object on the placement unit,
A temperature detection device for a heating cooker provided with a temperature detection means for detecting the temperature of the heated object at a contact portion where the lifting body contacts the heated object,
A magnet is provided on the lifting body,
The support is formed of a ferromagnetic material, and a magnet proximity portion where the magnet is close to the support due to the movement of the elevating body by mounting the object to be heated, and a detection portion at a position away from the magnet proximity portion And
The temperature detection device for a heating cooker, wherein the object to be heated detection means is a magnetic detection sensor capable of detecting magnetism, and the magnetic detection sensor is provided in the detection unit.   The temperature detection apparatus for a heating cooker according to claim 1, wherein the magnet is provided at a lower position apart from the contact portion in the elevating body. A flat surface portion that extends in a direction orthogonal to the ascending / descending direction of the elevating body is provided at one end that is an end portion on the elevating body side of the support body,
3. The heating cooker according to claim 1, wherein the magnet proximity portion is provided in the flat portion, and a biasing member that biases the lifting body upward is provided between the flat portion and the lifting body. Temperature detection device. The support is formed of a cylinder;
A lead wire connected to the temperature detecting means is provided in the cylindrical body,
The temperature detection device for a heating cooker according to any one of claims 1 to 3, wherein the detection unit is provided on an outer peripheral surface of the cylindrical body.   The temperature detection device for a heating cooker according to any one of claims 1 to 4, wherein a material forming the support is SUS420.

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