JP2015094521A - 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 whether a body to be heated is placed on a placement part even when a cylindrical support is formed in a substantially L shape.SOLUTION: A cylindrical support 10 is formed in a substantially L shape having a linear tip-side side part 11 and a linear base end-side side part 12, and a rope-like body 50 having flexibility is arranged in the cylindrical support 10 while having one end connected to a lifting body 20 and the other end extended into the base end-side side part 12 and made free in a direction along the axis of the base end-side side part 12, and the rope-like body 50 is configured to transmit pressing force applied when the lifting body 20 moves down and tensile force applied when the lifting body 20 moves up to a part of the rope-like body 50 positioned in the base end-side side part 12. One of a detection part 41 and an operation part 42 is provided at the base end-side side part 12 of the cylindrical support 10 and the other is provided at the part of the rope-like body 50 positioned in the base end-side side part 12.

Description

  According to the present invention, the cylindrical support that is fixedly installed on the cooking device and the bottom of the object to be heated placed on the placing unit of the cooking device are pressed down as they come into contact with each other. An elevating body supported by the upper end of the cylindrical support body in a state that it can be moved up and down and is urged to return upward, a detection unit that detects temperature, and a lead wire that transmits detection information of the detection unit A temperature detection means, a detection unit that can be switched between the first state and the second state, and the detection unit moved into the first state and the second state by moving closer to and away from the detection unit. A heated object detecting means having an operation part for switching, wherein the lead wire extends outside the end of the cylindrical support opposite to the side on which the lifting body is supported. In the state where the detector is disposed in front of the elevator The temperature of the abutting portion with which the bottom of the object to be heated abuts can be detected, and the detection unit and the operation unit can detect a positional displacement due to the raising and lowering of the elevating body. The present invention relates to a temperature detecting device for a heating cooker provided separately from the lifting body side.

  Such a temperature detection device for a heating cooker (hereinafter sometimes simply referred to as a temperature detection device) is placed on a mounting portion such as a gas cooker and heated by a heating means such as a gas burner in a heating cooker such as a gas stove. It is used to detect the temperature of the bottom of the object to be heated (such as a pan) and has a function of detecting whether or not the object to be heated is placed on the placement part.

That is, when the object to be heated is placed on the placement part, the bottom of the object to be heated placed on the placement part comes into contact with the abutting part of the top part of the lifting body, and the lifting body is pushed down.
And the temperature of the contact part of a raising / lowering body is detected as a temperature of a to-be-heated object by the detection part of a temperature detection means.
In addition, as the lifting body is pushed down by the object to be heated placed on the placement unit, the relative positional relationship in the direction along the axial direction of the cylindrical support body between the detection unit and the operation unit becomes closer. When the detection unit is switched from the first state to the second state or from the second state to the first state by changing from the separated state to the separated state, or from the separated state to the close state, The lowering of the body is detected, and the presence of the object to be heated is detected.
On the other hand, when the object to be heated placed on the placement portion is lifted, the lifting body is raised by the biasing force, and the relative position of the detection portion and the operation portion in the direction along the axial direction of the cylindrical support body The relationship is changed from the separated state to the close state, or from the close state to the separated state, and the detection unit is switched from the second state to the first state, or from the first state to the second state. As a result, the rise of the elevating body is detected, and the presence or absence of the object to be heated is detected.

In such a temperature detection device, conventionally, the cylindrical support is configured in a substantially straight line, and the lead wire of the temperature detection means arranged in the cylindrical support is provided with a reed switch as a detection unit. A magnet was provided as an operation portion on the outer peripheral portion of the support.
Then, the lead wire moves in the axial direction in the cylindrical support body as the lifting body moves up and down, so that the lead switch and the magnet in the direction (vertical direction) along the axial direction of the cylindrical support body. The relative positional relationship changes between the separated state and the close state, and the reed switch is switched between the first state and the second state, so that the presence / absence of the object to be heated on the placement part is detected. (For example, refer patent document 1).

JP 2006-34783 A

  By the way, in a heating cooker, the space in the up-down direction for installing a temperature detection apparatus may be narrow. For example, in the case of a so-called three-neck gas stove provided with three gas burners as heating means, a grill is provided at the approximate center in the left-right direction in the casing of the gas stove, and the exhaust pipe of the grill extends to the rear end in the casing. Since it is provided in an extended state, the installation space in the vertical direction is reduced for the temperature detection device installed corresponding to the gas burner provided above the exhaust pipe of the grill.

When the temperature detection device is provided in a narrow space in the up and down direction, the cylindrical support is arranged on the side that is substantially linear at the side where the lifting body is supported and the side opposite to the side where the lifting body is supported. It is comprised in the substantially L shape provided with the substantially linear base end side part.
In such a case, the lead wire of the temperature detection means is disposed in the cylindrical support body in a state of passing the bent portion from the distal side portion of the cylindrical support body and extending outside the proximal side portion. Become.

By the way, the end of the lead wire of the temperature detection means opposite to the detection part side (hereinafter sometimes referred to as a circuit side end) is connected to the electric circuit, so that the circuit side end thereof The movement of the cylindrical support in the direction along the axial direction is restricted.
Therefore, when a pressing force is applied to the end portion of the lead wire connected to the detection portion as the elevating body descends, the lead wire has an end portion in the cylindrical support body along the axial direction. Although the movement in the direction along the axial direction of the cylindrical support is restricted at the circuit side end of the lead wire, the lead wire may buckle. In particular, when the lead wire is disposed in a substantially L-shaped cylindrical support body, the lead wire is also connected to the inner surface of the cylindrical support body even in the portion of the lead wire that bends following the bent portion of the cylindrical support body. Since the resistance acts on the movement of the cylindrical support in the direction along the axial center direction due to contact with the lead wire, the phenomenon that the lead wire buckles is particularly likely to occur.

  Then, when the lifting body is pushed down as the object to be heated is placed on the placement portion, if the lead wire buckles, the distance that the lifting body descends and the reed switch moves through the cylindrical support in its axis. Since the difference from the distance moved in the center direction becomes large, the positional displacement of the elevating body cannot be accurately detected, and therefore the presence or absence of the object to be heated on the placement part may not be accurately detected. Due to such a buckling of the lead wire, the problem that the presence / absence of the object to be heated cannot be accurately detected on the mounting portion is particularly configured such that the cylindrical support is substantially L-shaped. The case becomes noticeable.

  The present invention has been made in view of such a situation, and an object of the present invention is to accurately determine whether or not the object to be heated is placed on the placement portion even when the cylindrical support is configured in a substantially L shape. An object of the present invention is to provide a temperature detection device for a heating cooker that can be detected.

A temperature detection apparatus for a heating cooker according to the present invention includes a cylindrical support that is fixedly installed on the heating cooker, and
The cylindrical support body can be moved up and down and urged to return upward so that the bottom of the object to be heated placed on the placement portion of the heating cooker can be pushed down. A lifting body supported by the upper end,
A temperature detection means having a detection unit for detecting temperature and a lead wire for transmitting detection information of the detection unit;
A detection unit that can be switched between a first state and a second state, and an operation unit that switches the detection unit between the first state and the second state by approaching and moving away from the detection unit. An object to be heated detection means,
In the state where the lead wire is arranged in the cylindrical support body in a form extending outside the end portion of the cylindrical support body opposite to the side on which the lift body is supported, the detection section is Provided in such a manner that the temperature of the abutting portion where the bottom of the heated object in the body abuts can be detected,
The detection unit and the operation unit are provided separately on the cylindrical support body side and the lift body side so as to be able to detect positional displacement due to the lifting and lowering of the lifting body,
In the first characteristic configuration, the cylindrical support body includes a substantially linear distal end side portion on a side where the lift body is supported and a substantially linear base on a side opposite to the side where the lift body is supported. It is comprised in the general L shape provided with the end side part,
As a free end in the direction in which the cable-shaped body having flexibility has one end connected to the lifting body and the other end extends into the base side part and along the axial direction of the base side part, Disposed in the cylindrical support,
The cord-like body can transmit a pressing force applied when the lifting body is lowered and a tensile force applied when the lifting body is raised to a portion of the cord-like body located in the base side portion. Configured,
One of the detection unit and the operation unit is provided on the proximal end side portion of the cylindrical support, and the other is provided on a portion of the cord-like body located in the proximal end side portion. There is in point.

According to the above characteristic configuration, the cable-like body bends following the shape of the bent portion of the cylindrical support body as the elevating body moves up and down, so that the axis of the roughly L-shaped cylindrical support body is its axis. Move in the direction along the core direction.
The other end of the cord-like body that extends into the base end side portion is a free end, and movement in the direction along the axial direction of the base end side portion is not restricted. Is configured to be able to transmit the pressing force applied when the elevating body descends and the tensile force applied when the elevating body elevates to the portion located in the base side portion of the cable-like body. As the shaft moves up and down, the end in the proximal side portion of the cord-like body has an axis of the proximal side portion equivalent to the amount of displacement in the direction along the axial direction of the distal end side portion in the lifting body. The cord-like body moves in the axial direction in the cylindrical support body in a state of being displaced in the direction along the core direction.

That is, when the elevating body descends, even if the lead wire is bent without maintaining the shape, the cord-like body is buckled while maintaining the shape along the axis of the substantially L-shaped cylindrical support body. Without moving the cylindrical support body along the axial direction to the end side of the base side, so it is attached to the part of the cable body in the base side The one that has been moved moves in the direction along the axial direction within the proximal side portion of the cylindrical support body by a distance equivalent to the distance by which the elevating body descends.
In short, as the object to be heated is placed on or removed from the placement part, the axis of the base side part of the detection part and the operation part as the elevating body moves up and down. It is possible to accurately switch the detection unit between the first state and the second state by accurately changing the relative positional relationship in the direction along the direction between the proximity state and the separation state.
Therefore, it is possible to provide a temperature detection device for a heating cooker that can accurately detect whether or not the object to be heated is placed on the placement portion even when the cylindrical support is configured in an approximately L shape. .

In addition to the first feature configuration, the second feature configuration is
A reed switch as the detection part is provided on the outer peripheral part of the base side part in the cylindrical support,
The base end in a state facing the reed switch so that a magnet can apply a magnetic field to the reed switch to switch the reed switch to either the first state or the second state. Provided on the outer periphery of the side part,
A magnetic shield that is positioned between the reed switch and the magnet and shields the magnetic field of the magnet from being applied to the reed switch is used as the operation unit, the proximal end side of the cord-like body. It exists in the point provided in the part in a side part.

According to the above characteristic configuration, as the elevating body moves up and down, the relative positional relationship of the reed switch and the magnetic shielding body in the direction along the axial direction of the base end side portion is such that the magnetic shielding body is the reed switch. Between the magnet and the magnet, close to the reed switch, and from the position between the reed switch and the magnet in the direction along the axial direction of the proximal side and away from the reed switch. Switch.
When the magnetic shield is separated from the reed switch, the magnetic field of the magnet is applied to the reed switch, so that the reed switch is switched to one of the first state and the second state, and the magnetic shield is close to the reed switch. In this state, since the magnetic field of the magnet is shielded from being applied to the reed switch, the reed switch is switched to the other of the first state and the second state.
Since the magnetic shield can be reduced in weight as compared with a reed switch or a magnet by, for example, making the wall thickness relatively thin, the base of the magnetic shield accompanying the raising and lowering of the lifting body can be reduced. It is possible to smoothly move the end side portion in the direction along the axial direction. As a result, when the object to be heated is placed on or removed from the placement unit, the reed switch is more accurately set in the first state and the second state as the elevating body moves up and down. Can be switched to.
Therefore, the reliability in detecting whether or not the object to be heated is placed on the placement unit can be further improved.

The third feature configuration is in addition to the second feature configuration,
The cylindrical magnetic shield is provided at a portion in the base side portion of the cord in a state in which the lead wire is housed.

According to the above characteristic configuration, when the magnetic shield attached to the cord-like body moves in the direction along the axial direction in the proximal side portion as the elevator body moves up and down, the cord-like body Even if the magnetic shield moves in the radial direction of the base side, the magnetic shield is cylindrical and is arranged with the lead wires inside, so that the magnetic shield is between the reed switch and the magnet. When it is located in the position, it is possible to accurately shield the magnetic field of the magnet from being applied to the reed switch.
In short, the reed switch is more accurately set to the first state and the second state as the elevating body moves up and down as the object to be heated is placed on or removed from the placement unit. Can be switched.
Therefore, the reliability in detecting whether or not the object to be heated is placed on the placement unit can be further improved.

The fourth feature configuration is in addition to any one of the first to third feature configurations,
The cord is in the point of a piano wire.

According to the above characteristic configuration, the piano wire has a thin wire diameter, but bends following the shape of the bent portion of the cylindrical support body, while the pressing force applied when the elevating body descends and the elevating body rises. The tensile force applied to the piano wire can be accurately transmitted to the portion located in the base side portion of the piano wire.
That is, by using a thin piano wire as the cord-like body, a thinner cylindrical support can be used.
Therefore, even if the temperature of the temperature detection device for the heating cooker is reduced in size and weight, even when the cylindrical support is substantially L-shaped, the presence or absence of the object to be heated on the mounting portion is accurately detected. Can be possible.

In addition to any one of the first to third feature configurations described above, the fifth feature configuration is
The cord-like body is a cable release.

According to the above characteristic configuration, the cable release can accurately transmit the pressing force and the pulling force applied to the one end portion to the other end while being easily bent. , While following the shape of the bent portion of the cylindrical support body, the pressing force applied when the elevating body descends and the tensile force applied when the elevating body ascends are located within the base side part of the cable release. It can be accurately transmitted to the part to be. As a result, the reed switch is moved more accurately between the first state and the second state as the elevating body moves up and down by the object to be heated being placed on or removed from the placement unit. Can be switched to.
Therefore, the reliability in detecting whether or not the object to be heated is placed on the placement unit can be further improved.

Longitudinal sectional view in a state where the lifting body in the temperature detection device for the cooking device is located at the upper limit position Longitudinal sectional view of the temperature detecting device for a heating cooker with the lifting body lowered The perspective view which shows the installation state of to-be-heated object detection means A perspective view of a gas stove equipped with a temperature detection device for a cooking device Longitudinal sectional view of the vicinity of the gas burner in a gas stove equipped with a temperature detection device for cooking appliances

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, a gas stove equipped with a temperature detection device S for a cooking device according to the present invention will be briefly described.
As shown in FIG. 4, the gas stove is constructed in a built-in type, and has three openings 3 (see FIG. 5) arranged in the left-right direction on a top plate 2 provided at the top of a rectangular box-shaped casing 1 that opens upward. ) And an annular gas burner 4 is arranged in each opening 3, and the five virtues 5 (an example of a placement portion) for placing an object to be heated (not shown) such as a pan corresponding to each gas burner 4. 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. In addition, the gas burner 4 on the back side at the center in the left-right direction with the smallest amount of combustion may be referred to as a small thermal power burner 4 below.
Then, as shown in FIG. 5, the small thermal power burner 4 is disposed above the grill exhaust pipe 8.

  Since the gas burner 4 is well-known, it will be briefly described by omitting the detailed description and illustration. As shown in FIG. 5, an annular burner body 4a having a large number of flame holes (not shown) on the outer periphery, The burner body 4a is provided with a mixing tube 4b for supplying a mixture of gas fuel and air, a gas nozzle 4c for supplying gas fuel to the mixing tube 4b, and the like, and is configured in an annular shape.

For each of the three gas burners 4, a temperature detection device (hereinafter simply referred to as a temperature detection device) S for a cooking device is provided. Similarly, the three temperature detecting devices S provided in each gas burner 4 respectively have a heated object temperature detecting function for detecting the temperature of the heated object placed on the virtues 5, and on the virtues 5. A heated object detection function for detecting whether or not the heated object is placed is provided.
And about the temperature detection apparatus S with respect to the small thermal power burner 4, since the installation space in an up-down direction is narrow on the relationship arrange | positioned above the grill exhaust pipe 8, the temperature detection apparatus S which concerns on this application is provided.

Hereinafter, based on FIG.1 and FIG.2, the temperature detection apparatus S which concerns on this application is demonstrated.
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 is moved up and down so that it is pushed down as the cylindrical support 10 fixedly erected on the gas stove and the bottom of the heated object placed on the virtues 5 of the gas stove 4 come into contact with each other. The lifting / lowering body 20 supported at the upper end of the cylindrical support body 10 in a state of being freely returned and biased upward, a detection unit 31 (for example, a thermistor) for detecting temperature, and detection information of the detection unit 31 The temperature detection means 30 having a lead wire 32 to transmit, the detection unit 41 that can be switched between the first state and the second state, and the detection unit 41 by moving closer to and away from the detection unit 41 An object to be heated detection means 40 having an operation unit 42 for switching between a state and a second state is provided.

And the detection part 31 is the state in which the lead wire 32 is arrange | positioned in the cylindrical support body 10 in the form extended outside the edge part on the opposite side to the side in which the raising / lowering body 20 in the cylindrical support body 10 was supported. The temperature of the abutting portion 21 with which the bottom of the object to be heated abuts in the elevating body 20 abuts is provided.
Further, the detection unit 41 and the operation unit 42 are provided separately on the cylindrical support body 10 side and the lift body 20 side so as to be able to detect the positional displacement due to the lift of the lift body 20.

When the temperature detection device S is provided for the small thermal power burner 4, since the installation space in the vertical direction is narrow, the cylindrical support body 10 has a substantially straight tip side portion on the side where the lifting body 20 is supported. 11 and a substantially linear base end side portion 12 opposite to the side on which the lifting body 20 is supported.
In this embodiment, the cylindrical support 10 is formed by bending a single straight pipe member 14 (an example of a pipe member) into an arc shape at a substantially central portion thereof, thereby forming the base side portion 11 and the base side portion 11 together. The end-side side portion 12 is configured in a substantially L-shape that is connected substantially at right angles via an arcuate curved portion 13. Incidentally, the material of the pipe member 14 constituting the cylindrical support 10 is stainless steel (for example, SUS304).

  Specifically, the outer diameter and inner diameter of the cylindrical support 10 are 6.0 mmφ and 5.0 mmφ, respectively. Further, the curved portion 13 of the cylindrical support 10 is generally arc-shaped with a central angle of 90 ° and an inner peripheral radius of 20 mm.

As shown in FIGS. 1 and 2, in the present invention, a flexible cord-like body 50 has one end connected to the lifting body 20 and the other end extending into the proximal side portion 12 and the proximal end side. As a free end in the direction along the axial direction of the side portion 12, it is disposed in the cylindrical support 10, and the cord 50 has a pressing force applied when the elevating body 20 is lowered and the elevating body 20 is The pulling force applied when ascending is configured to be able to be transmitted to a portion of the cord-like body 50 located in the proximal side portion 12 while maintaining the form along the axial center of the cylindrical support 10. .
And one of the detection part 41 and the operation part 42 is provided in the cylindrical support body 10 side by providing in the base end side part 12 of the cylindrical support body 10, and the other is a cord-shaped body. By being provided at a portion located in the proximal end side part 12 at 50, it is provided on the lifting body 20 side.

Hereinafter, based on FIG.1 and FIG.2, each part of the temperature measuring device S is demonstrated in detail.
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.

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

The end (upper end) of the cylindrical support 10 on the distal end side portion 11 side has 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. The ring-shaped spring receiving portion 24 is locked.
The elevating body 20 is prevented from coming off by the spring receiving portion 24 at the step portion of the main body portion 22 between the small diameter portion and the large diameter portion, and between the back surface of the contact portion 21 and the spring receiving portion 24. In the state where the coil spring 25 is interposed in a compressed state, the coil spring 25 is supported by the end portion on the distal end side portion 11 side of the cylindrical support 10. As a result, the elevating body 20 is supported on the upper end portion of the distal end side portion 11 of the cylindrical support body 10 in a state where it can be raised and lowered and returned to the upper side by the coil spring 25.

In this embodiment, the cord-like body 50 is constituted by a piano wire 51. Incidentally, the piano wire 51 is, for example, a type A (SWP-A) having a linearity of 1 mmφ.
The piano wire 51 is connected to the sensor support portion 23 of the lifting body 20 by welding or the like, for example, in a state where the other end is not restrained (free state).
Thus, the piano wire 51 having one end connected to the sensor support portion 23 of the elevating body 20 is arranged in the substantially L-shaped cylindrical support body 10 with the other end extending into the base end side portion 12. Established.

And the piano wire 51 has flexibility, and the other end extended in the base end side part 12 is not restrained. Therefore, as the lifting body 20 moves up and down, the piano wire 51 follows the shape of the bending portion 13 and bends while maintaining the shape along the axis of the substantially L-shaped cylindrical support body 10. Thus, the end portion in the base end side portion 12 extends along the axial direction of the base end side portion 12 in the same manner as the amount of displacement in the direction along the axial direction of the distal end side portion 11 in the lifting body 20. In the state displaced in the direction, the inside of the cylindrical support 10 is moved in the axial direction.
That is, the piano wire 51 accurately applies the pressing force applied when the elevating body 20 descends and the tensile force applied when the elevating body 20 ascends to the portion of the piano wire 51 located in the base side part 12. Can communicate.

As shown in FIG. 3, in this embodiment, the reed switch 43 as the detection unit 41 is provided on the outer peripheral portion of the proximal side portion 12 in the cylindrical support 10, and the magnet 44 is connected to the reed switch 43. On the other hand, in a state facing the reed switch 43 so that a magnetic field is applied to the reed switch 43 so that the reed switch 43 can be switched between an on state (an example of the first state) and an off state (an example of the second state). It is provided on the outer peripheral portion of the base end side portion 12. That is, in addition to the reed switch 43, the detection unit 41 is configured by including the magnet 44.
In addition, a magnetic shield 45 that is positioned between the reed switch 43 and the magnet 44 and shields the magnetic field of the magnet 44 from being applied to the reed switch 43 serves as a base end of the piano wire 51 as the operation unit 42. It is provided in a part in the side part 12.

For example, a normally open type reed switch 43 is used.
The magnet 44 is, for example, a prismatic shape having a 6 mm square and a length of about 10 mm, and a ferrite magnet, a neodymium magnet, or the like is used.
The magnetic shield 45 has a shape and a size that cannot pass through the inside of the curved portion 13 of the cylindrical support 10 in a state of being attached to the piano wire 51. In this embodiment, the outer diameter is 4.5 mmφ. Thus, the length is 15 mm. Further, the inner diameter of the cylindrical magnetic shield 45 is set to be larger than the outer diameter of the heat-resistant tube 33 of the temperature detecting means 30. Incidentally, the magnetic shield 45 is made of, for example, a soft magnetic material (eg, soft ferrite, iron, etc.) having a small coercive force and a high magnetic permeability.

And this cylindrical magnetic shielding body 45 is provided in the part in the base end side part 12 in the piano wire 51 in the state which comprises the lead wire 32 coat | covered with the heat-resistant tube 33 of the temperature detection means 30. Yes.
As described above, since the inner diameter of the cylindrical magnetic shield 45 is larger than the outer diameter of the heat-resistant tube 33 of the temperature detecting means 30, the magnetic shield 45 and the heat-resistant body in the direction along the length direction of the lead wire 32 are used. The relative position with respect to the lead wire 32 covered with the tube 33 is configured to be variable.

The reed switch 43 is fixed to a predetermined location on the outer peripheral portion of the proximal end side portion 12 of the cylindrical support 10 by, for example, a heat-resistant adhesive (not shown), and the magnet 44 is fixed to the cylindrical support 10. For example, a heat-resistant adhesive (not shown) is fixed to a position facing the reed switch 43 (a position separated from the reed switch 43 by a central angle of about 180 °) on the outer peripheral portion of the base end side portion 12. The
A lead wire 46 for determining the on / off state of the reed switch 43 is connected to the connector 34 described above, and the on / off state of the reed switch 43 is input to the control unit.

  As shown in FIGS. 1 and 3A, the cylindrical magnetic shield 45 is a magnet 44 in a state in which the elevating body 20 is raised to the upper limit position (a state in which an object to be heated is not placed on the virtues 5). In order to shield the magnetic field from being applied to the reed switch 43, it is in a state (proximity state) located between the reed switch 43 and the magnet 44, and as shown in FIG. 2 and FIG. The cylindrical support is placed between the reed switch 43 and the magnet 44 so that the magnetic field of the magnet 44 is applied to the reed switch 43 as the object to be heated is placed on the virtues 5 and the elevating body 20 is lowered. The position is fixed and attached to the piano wire 51 so as to be in a state of being protruded (separated state) from the end portion side of the base end side portion 12 side of 10.

  That is, in the state in which the elevating body 20 is raised to the upper limit position and the reed switch 43 and the magnetic shield 45 are close to each other (FIGS. 1 and 3A), the reed switch 43 is turned off and the elevating body 20 is lowered. When the reed switch 43 and the magnetic shield 45 are separated from each other (FIGS. 2 and 3B), the reed switch 43 is turned on, and the magnetic shield 45 as the operation unit 42 is the detection unit. The reed switch 43 is configured to be switched between an on state and an off state by approaching and separating from the reed switch 43 as 41.

Next, although not shown, a method for manufacturing the temperature detection device S configured as described above will be briefly described.
First, the spring receiving portion 24 is locked to one end of the linear pipe member 14 constituting the cylindrical support body 10, and the main body portion 22 of the elevating body 20 is prevented from being detached by the spring receiving portion 24. In this state, it is arranged at one end of the pipe material 14.
In addition, the piano wire 51 is connected to the sensor support portion 23 provided on the back surface of the contact portion 21, and the magnetic shield 45 is fixed to a predetermined portion of the piano wire 51.
Further, the detection unit 31 connected with the lead wire 32 covered with the heat-resistant tube 33 is fixed in the sensor support unit 23 provided on the back surface of the contact portion 21 of the elevating body 20.
Then, in the state where the lead wire 32 covered with the heat-resistant tube 33 and the piano wire 51 provided with the magnetic shield 45 are arranged in the pipe member 14, the contact portion 21 of the elevating body 20 is arranged, and the coil spring 25 is arranged inside. The lifting body 20 is supported on one end portion of the pipe member 14 by being fixed to the opening end portion of the large-diameter portion of the main body portion 22. Then, the coil spring 25 is provided in a compressed state between the back surface of the contact portion 21 and the spring receiving portion 24.

Next, the pipe material 14 is bent into a generally L shape by a known bender (bending machine, not shown), and the cylindrical support 10 is configured in a generally L shape.
Next, the reed switch 43 and the magnet 44 are respectively provided at predetermined positions on the proximal end side portion 12 of the cylindrical support 10, and the lead wire 32 of the temperature detecting means 30 and the lead wire 46 of the reed switch 43 are connected to the connector. 34 is connected.

  In the temperature detection device S configured as described above, as shown in FIG. 5, the distal end side portion 11 of the cylindrical support 10 is in a standing posture at the substantially central portion of the annular burner body 4 a, and In the state where the object to be heated is not placed, the base end side portion 12 of the cylindrical support body 10 is connected to the sensor fixture (with the contact portion 21 of the elevating body 20 protruding from the upper surface of the virtues 5. It is provided in the casing 1 of the gas stove by being fixed above the grill exhaust pipe 8 by a not-shown illustration.

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 reed switch 43 is turned off. A non-heated object mounting state in which the object to be heated is not mounted 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 reed switch 43 is turned on, and the heated object placement state in which the heated object is placed on the virtues 5 is detected.
If the object to be heated is lifted and removed from the virtues 5 from the state where the object to be heated is placed on the virtues 5, the lifting body 20 returns to the upper limit position by the urging force of the coil spring 25, and the reed switch 43 Is turned off and the object-to-be-heated object placement state is detected.

In the temperature detection device S of the present application, as described above, the end portion of the piano wire 51 that extends into the proximal end side portion 12 is a free end, and therefore, is along the axial direction of the proximal end side portion 12. Movement in the direction is not restricted. In addition, the inner diameter of the cylindrical magnetic shield 45 is larger than the outer diameter of the heat-resistant tube 33, and the lead wire 32 covered with the magnetic shield 45 and the heat-resistant tube 33 in the direction along the length direction of the lead wire 32. The relative position between and can be changed.
Thereby, even if the lead wire 32 covered with the heat-resistant tube 33 is bent without maintaining the shape when the object to be heated is placed on the virtues 5 and the lifting body 20 is lowered, the piano wire 51 is not bent. The end portion of the base side portion 12 along the axial direction of the cylindrical support body 10 without buckling while maintaining the configuration along the axis of the substantially L-shaped cylindrical support body 10. Since the magnetic shield 45 serving as the operation portion 42 is a distance equivalent to the distance by which the elevating body 20 is lowered, the inside of the proximal end side portion 12 of the cylindrical support 10 is a direction along the axial direction. Move to.
Therefore, the heated object detection means 4 can accurately detect the positional displacement due to the raising and lowering of the elevating body 20, and thus can accurately detect whether or not the heated object is placed on the virtues 5.

[Another embodiment]
Next, another embodiment will be described.
(A) Specific examples of the cord-like body 50 are not limited to the piano wires exemplified in the above embodiment. For example, although not illustrated, a cable release for camera shutter operation or a resin The wire can be used.

(B) The specific configuration of the heated object detection means 40 is not limited to the configuration illustrated in the above embodiment, that is, the configuration including the reed switch 43, the magnet 44, and the magnetic shield 45.
For example, a configuration in which a reed switch is provided as the detection unit 41 and a magnet is provided as the operation unit 42 can be used.
In this case, a reed switch is provided on the proximal end side portion 12 of the cylindrical support body 10 and a magnet is provided on a portion of the cable-like body 50 in the proximal end side portion 12. The magnet can be provided on the proximal end side portion 12 of the cylindrical support 10.

  The detection unit 41 includes a reflective optical sensor, and the operation unit 42 includes a reflector that reflects light from the reflective optical sensor. The detection unit 41 includes a transmissive optical sensor, and the operation unit 42 includes: In addition, a configuration including a light shield that blocks light between the light emitting unit and the light receiving unit of the transmissive optical sensor can be used.

(C) Although the normally open switch is used as the reed switch 43 in the above embodiment, a normally closed switch may be used.

(D) As a relative positional relationship between the detection unit 41 and the operation unit 42 in the direction along the axial center direction of the proximal side part 12, in the above embodiment, in the state where the lifting body 20 is raised to the upper limit position, The detection unit 41 and the operation unit 42 are in a proximity state, and the detection unit 41 and the operation unit 42 are separated from each other as the elevating body 20 is lowered. Conversely, in a state where the lifting body 20 is raised to the upper limit position, the detection unit 41 and the operation unit 42 are separated from each other, and the detection unit 41 and the operation unit 42 are in a proximity state as the lifting body 20 is lowered. The relative positional relationship may be as follows.

(E) In the substantially L-shaped shape of the cylindrical support 10, the angle at which the distal end side portion 11 and the proximal end side portion 12 are connected via the curved portion 13 may be an angle slightly smaller than a right angle. Also, an angle slightly larger than a right angle may be used.

(F) To form the cylindrical support 10 in an approximately L shape, a straight distal end side portion forming tube 11p that forms the distal end side portion 11 and an arcuate curved portion for forming the curved portion 13 You may comprise by connecting the three pipe members of the formation pipe 13p and the base end side part forming pipe 12p for forming the base end side part 12.

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

  As described above, there is provided a temperature detection device for a heating cooker that can accurately detect whether or not the object to be heated is placed on the placement portion even when the cylindrical support is configured in an approximately L shape. can do.

5 Gotoku (mounting part)
DESCRIPTION OF SYMBOLS 10 Cylindrical support body 11 Front end side part 12 Base end side part 20 Lifting body 21 Contact part 30 Temperature detection means 31 Detection part 32 Lead wire 40 Heated object detection means 41 Detection part 42 Operation part 43 Reed switch 44 Magnet 45 Magnetic shield 50 Cord 51 Piano wire

Claims (5)

A cylindrical support that is fixedly installed on the cooking device;
The cylindrical support body can be moved up and down and urged to return upward so that the bottom of the object to be heated placed on the placement portion of the heating cooker can be pushed down. A lifting body supported by the upper end,
A temperature detection means having a detection unit for detecting temperature and a lead wire for transmitting detection information of the detection unit;
A detection unit that can be switched between a first state and a second state, and an operation unit that switches the detection unit between the first state and the second state by approaching and moving away from the detection unit. An object to be heated detection means,
In the state where the lead wire is arranged in the cylindrical support body in a form extending outside the end portion of the cylindrical support body opposite to the side on which the lift body is supported, the detection section is Provided in such a manner that the temperature of the abutting portion where the bottom of the heated object in the body abuts can be detected,
A temperature detection device for a cooking device, wherein the detection unit and the operation unit are provided separately on the cylindrical support body side and the lift body side so that position displacement due to the lifting and lowering of the lift body can be detected. There,
The cylindrical support has a substantially straight distal side on the side on which the lifting body is supported and a generally straight base side on the side opposite to the side on which the lifting body is supported. It is configured in a general L shape with
As a free end in the direction in which the cable-shaped body having flexibility has one end connected to the lifting body and the other end extends into the base side part and along the axial direction of the base side part, Disposed in the cylindrical support,
The cord-like body can transmit a pressing force applied when the lifting body is lowered and a tensile force applied when the lifting body is raised to a portion of the cord-like body located in the base side portion. Configured,
One of the detection unit and the operation unit is provided on the proximal end side portion of the cylindrical support, and the other is provided on a portion of the cord-like body located in the proximal end side portion. A temperature detection device for cooking appliances. A reed switch as the detection part is provided on the outer peripheral part of the base side part in the cylindrical support,
The base end in a state facing the reed switch so that a magnet can apply a magnetic field to the reed switch to switch the reed switch to either the first state or the second state. Provided on the outer periphery of the side part,
A magnetic shield that is positioned between the reed switch and the magnet and shields the magnetic field of the magnet from being applied to the reed switch is used as the operation unit, the proximal end side of the cord-like body. The temperature detection apparatus for cooking-by-heating machines of Claim 1 provided in the part in a side part.   The temperature detection device for a heating cooker according to claim 2, wherein the cylindrical magnetic shield is provided in a portion in the base end side portion of the cord in a state in which the lead wire is housed.   The temperature detecting device for a heating cooker according to any one of claims 1 to 3, wherein the cord is a piano wire.   The temperature detection device for a heating cooker according to any one of claims 1 to 3, wherein the cord is a cable release.

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