JP2015124935A - Heating cooking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooking apparatus in which the temperature of a cooking container (a cooking utensil such as a pot) such as a gas stove can be detected and loading of the cooking container can be detected.SOLUTION: A heating cooking apparatus includes a temperature detector in which a fixed side supporting member 56 is provided with a moving side support cylinder 53 with an abutment body 51 bonded with a temperature sensor so as to move in the vertical motion, energizing means 54 energizes the moving side support cylinder in the upper direction, and an abutment body moves in the vertical motion following the cooking container to abut the bottom surface of the cooking container. One of the moving side support and the fixed side supporting member includes a magnetic material 65, and the other of them includes a coil 70. A control part is configured to detect an electric current flowing through the coil, when a predetermined AC voltage is applied to the coil and measures an impedance with respect to the AC voltage of the coil. If the measured impedance is greater than a predetermined impedance, the cooking container is determined to be in a loading state of the cooking container loaded on the abutting member.

Description

  The present invention relates to a cooking device such as a gas stove, and more specifically, can detect the temperature of a cooking container (cooking utensil) such as a pan placed on the cooking device such as a gas stove, and the cooking vessel. The present invention relates to a cooking device capable of detecting that the is placed.

  2. Description of the Related Art Conventionally, a cooking device such as a gas stove includes a temperature detection device that detects the temperature of a cooking container such as a pan in contact with the bottom surface.

  And as such a temperature detection apparatus for cooking appliances, for example, a temperature detection apparatus as disclosed in Patent Document 1 has been proposed.

As shown in FIG. 4, the temperature detection device 101 for the cooking device of Patent Document 1
(A) A cylinder 117 is provided on the outer periphery of the vertical portion (straight barrel portion) of the support pipe 103 so as to be movable up and down.
(B) A cap body 104 that is in contact with the bottom surface of the cooking container (not shown) is fixed to the upper portion of the cylinder 117, and the thermistor 105 is attached to the cap body 104.
(C) The thermistor lead wire 130 connected to the thermistor 105 is movably inserted into the support pipe 103;
(D) The support pipe 103 has a structure provided with a detection device L for detecting the movement of the thermistor lead wire 130 along with the top and bottom of the cap body 104. The detection device L is formed of a sensing switch 137, a contact portion 138, and the like.

  Further, in Patent Document 1, as shown in FIG. 5, the detection device L is provided with a reed switch 140 that senses magnetic force at a desired position of the thermistor lead wire 13 and turns on / off, and the support pipe 103. It is described that a magnet 142 for forming a magnetic field is provided on the outer periphery.

  When the detection device L is configured in this way, the temperature of the cooking container can be detected by the thermistor 105, and at the same time, the movement of the thermistor lead wire 130 is detected by the detection device L, and cooking such as a pan is performed. It is possible to detect that the container has been placed on the placing portion of the cooking device such as a gas stove.

  That is, as the cylinder 117 provided with the cap body 104 is moved up and down, the thermistor lead wire 130 moves in the axial direction in the support pipe 103, whereby the reed switch 140 constituting the detecting means L and the magnet 142. The relative positional relationship in the direction (vertical direction) along the axial center direction of the support pipe 103 changes between the separated state and the close state, and the reed switch 140 is switched between the first state and the second state. When the cooking container is placed on the placing portion of the cooking device, it is possible to detect that the cooking container has been placed.

  By the way, the end of the thermistor lead wire 130 opposite to the end connected to the thermistor 105 (hereinafter also referred to as “circuit side end”) is connected to an electric circuit (not shown). It is fixed.

  Therefore, when a downward pressing force is applied to the end of the thermistor lead wire 130 connected to the thermistor 105 as the cylinder 117 provided with the cap body 104 is lowered, the thermistor lead wire 130 is The support pipe 103 moves downward along the axial direction, but the circuit side end of the thermistor lead wire 130 is connected and fixed to the electric circuit. When the movement distance (descent distance) of the cylinder 117 provided with the cap body 104 is increased, the stress applied to the thermistor lead wire 130 is increased, and the cylinder 117 provided with the cap body 104 is moved. The thermistor 105 is attached because there is a difference between the moving distance (descent distance) and the moving distance of the reed switch 140 attached to the thermistor lead wire 130. Detecting the minute movement of the body 104 with high accuracy becomes difficult.

  That is, depending on the situation, the reed switch 140 attached to the thermistor lead wire 130 does not necessarily move up and down in proportion to the raising and lowering of the cylinder 117 provided with the cap body 104. There is a problem that it is impossible to accurately detect that the cooking container is placed.

JP 2006-34783 A

  The present invention solves the above-described problem, and can detect the temperature of a cooking container (such as a cooking stove such as a pan) such as a gas stove without requiring a complicated configuration. It aims at providing the cooking device which can detect having been mounted.

In order to solve the above problems, the cooking device of the present invention is:
A movable-side support cylinder comprising a fixed-side support member fixed to a fixed portion of the cooking appliance body and a contact body thermally coupled to the temperature sensor, and is movable up and down relative to the fixed-side support member A movable support cylinder provided; and an urging means for urging the movable support cylinder upward with respect to the fixed support member; and the contact body in contact with the bottom surface of the cooking container, A cooking device provided with a temperature detection device configured to move up and down following the vertical movement of the cooking container within the movable range of the moving side support and to contact the bottom surface of the cooking container. ,
A heating unit and a control unit for adjusting the heating energy supply amount to the heating unit;
A magnetic body is provided on one of the moving side support and the fixed side supporting member, and a coil is provided on the other side of the moving side support and the fixed side support member, respectively.
The control unit is configured to detect a current flowing through the coil when a predetermined AC voltage is applied to the coil, and to measure an impedance of the coil with respect to the AC voltage,
When the measured impedance is larger than a predetermined impedance, the cooking container is placed on the abutting body, whereby the moving support is moved downward, and the cooking container is placed. It is characterized by being configured to detect this.

  As described above, the cooking device according to the present invention includes a temperature output device that detects the temperature of a cooking device such as a pan, and controls the heating unit and the amount of heating energy supplied to the heating unit such as fuel gas. A magnetic body disposed on one of the moving side support or the fixed side support member, and a coil disposed on the other of the moving side support or the fixed side support member, and the control unit includes: A current flowing through the coil is detected when a predetermined AC voltage is applied to the coil, and the impedance of the coil with respect to the AC voltage can be measured. The measured impedance is a value greater than the predetermined impedance. In some cases, it is configured to detect that the cooking container is placed on the abutting body, so that the movable support is moved downward, and the cooking container is placed. Heating that can detect the temperature of a cooking vessel such as a gas stove (cooking tool such as a pan) without requiring a complicated configuration and can detect that the cooking vessel has been placed. It becomes possible to provide cooking equipment.

  That is, according to the cooking device of the present invention, the cooking container is used without detecting a complicated configuration or base material for detecting that the cooking container such as a pan is placed by using the temperature generating device. It is possible to reliably detect that is placed.

It is sectional drawing which shows the principal part of the heating cooking appliance (gas stove) concerning embodiment of this invention. (A) is a figure which shows the principal part structure of the temperature detection apparatus used for the heating cooker concerning embodiment of this invention, Comprising: The movement side support body shows the state located in the uppermost part of the movement range. It is a partially cutaway front view, (b) is a partially cutaway front view showing a state in which the moving side support body has moved downward in its moving range. It is a partially notched front view which shows the principal part structure of the other temperature detection apparatus used for the heating cooker concerning other embodiment of this invention. It is a figure which shows the structure of the temperature detection apparatus for the conventional heating cooking appliances. It is a figure which shows the modification of the temperature detection apparatus for the conventional heating cooking appliances.

Hereinafter, an embodiment of the present invention will be shown and features thereof will be described in detail.
Drawing 1 is a sectional view showing the important section of the cooking-by-heating machine (gas stove) concerning the embodiment of the present invention.
Moreover, Fig.2 (a) is a figure which shows the principal part structure of the temperature detection apparatus used for the heating cooker (gas stove) concerning embodiment of this invention, Comprising: A movement side support body is the movement range. FIG. 2B is a partially cutaway front view showing a state in which the moving side support body has moved downward in the moving range.

  As shown in FIG. 1, a temperature detection device 1 used in a heating cooker (gas stove) according to an embodiment of the present invention is disposed in a burner portion of a gas stove (heating cooker), and a cooking container ( It is a temperature detection device used to detect the temperature of 2).

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

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

  As shown in FIG. 1, an annular burner base 41 is connected to the tip of the mixing tube 33 in the burner portion. An annular burner cap 5 is detachably mounted on the upper portion of the burner base 41. An insertion hole 4 is provided at substantially the center of the burner base 41 and the burner cap 5 so as to penetrate vertically.

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

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

  Next, the temperature detection device 1 disposed in the stove part will be described. FIG. 2A and FIG. 2B are partially cutaway front views of the temperature detection device 1.

  As shown in FIGS. 2A and 2B, the temperature detection device 1 of this embodiment is a cylindrical fixed-side support member that is fixed to a fixing portion 3 (FIG. 1) of a stove body (cooker body). 56 and a cylindrical moving side support 53 that is externally fitted to the fixed side supporting member 56 so as to be slidable up and down.

  On the lower surface side of the contact body 51 provided at the upper end of the moving side support 53, a temperature sensor fixing member 62 provided with a flange portion 62a and a cylindrical storage portion 62b formed to hang downward from the lower surface of the flange portion. The thermistor 57 as a temperature sensor is incorporated in the cylindrical housing portion 62b of the temperature sensor fixing member 62.

  The thermistor 57 is connected to the control unit (valve control device) 50 (FIG. 1) in the stove body via the thermistor lead wire 15. For example, the temperature of the contact body 51 rises to a set value or more. When this is detected, the gas valve is automatically closed to prevent air blow.

  Further, as shown in FIGS. 2 (a) and 2 (b), the moving side support 53 is formed in a multi-cylindrical shape in which an outer cylinder (covering protection cylinder) 63 is integrated. In the embodiment, it is urged upward by an urging means constituted by a compression coil spring) 54, and a washer 65 is fitted into the upper end of the fixed side support member 56 and fixed by caulking.

  In the state shown in FIG. 2A where the moving side support 53 is located at the uppermost position in the moving range (that is, the moving side support 53 is at the uppermost position in the vertically movable range), The washer 65 is configured to come into contact with a small diameter portion 53 a provided on the lower end side of the moving support 53 so that the upward movement of the moving support 53 is restricted.

  And in the state which the movement side support body 53 shown in FIG.2 (b) moved below in the movement range, between the washer 65 and the small diameter part 53a provided in the lower end side of the movement side support body 53 A gap is formed in the gap.

Next, the characteristic structure of the temperature detection apparatus 1 used for the cooking device of this embodiment will be described.
In the temperature detection device 1 used in the cooking device according to this embodiment, a washer made of a known magnetic material (for example, ferrite, neodymium, etc.) is used as the washer 65. As the magnetic material, a magnetized ferromagnetic material, that is, a magnet can be used.

  Further, the cylindrical housing portion 62b in which the flange portion 62a and the thermistor 57 constituting the temperature sensor fixing member 62 are incorporated is made of a nonmagnetic material such as copper, and a coil is provided on the outer periphery of the lower end of the cylindrical housing portion 62b. 70 is disposed.

  The coil 70 is connected to a control unit (valve control device) 50 (FIG. 1) in the stove body via a wire (not shown) different from the thermistor lead wire 15. When a predetermined alternating voltage is applied to the coil 70, the current flowing through the coil 70 is detected, and the impedance of the coil 70 with respect to the alternating voltage can be measured.

<Detection of placing state of cooking container on gas stove>
In the temperature detection apparatus 1 used in the cooking device of this embodiment, as described above, the coil (magnetic detection unit) 70 has a wiring (not shown) different from the thermistor lead wire 15 as described above. And a current flowing through the coil 70 when a predetermined AC voltage is applied to the coil 70 from the control unit 50 is detected. The impedance of the coil with respect to the AC voltage can be measured.

  By the way, the cooking container 2 is not placed on the gas stove (heating cooking appliance), the moving side support 53 is positioned at the uppermost position in the moving range, and the coil 70 is the above-described washer (also referred to as “magnetic body”) 65. 2A, the cooking container 2 is placed, the moving support 53 moves downward, and the coil 70 approaches the magnetic body (washer) 65. In the state of FIG. 2 (b), which is positioned at the position, the impedance of the coil 70 with respect to the AC voltage is increased.

  That is, by applying a predetermined AC voltage to the coil 70 and detecting the current passed through the coil 70 at that time, the impedance of the coil 70 with respect to the AC voltage can be measured. By detecting that the impedance changes from a small value to a large value, it is possible to detect that the movable support 53 has moved downward.

  And in the cooking-by-heating apparatus concerning this embodiment, it is comprised so that the electric current which flows through the coil 70 can be detected when the predetermined alternating voltage is applied to the coil 70 from the control part 50 as mentioned above. Therefore, by detecting the current flowing through the coil 70, it is detected that the cooking container 2 is placed on the gas stove (heating cooking appliance) by measuring the impedance of the coil 70 with respect to the AC voltage. be able to. That is, when the measured impedance of the coil is larger than the predetermined impedance, the moving side support 53 is moved downward, that is, the cooking container 2 is placed on the gas stove (heating cooking appliance). It can be detected.

<Another embodiment>
FIG. 3 is a diagram illustrating another temperature detection apparatus 1A used in the cooking device according to the embodiment of the present invention.
As shown in FIG. 3, the temperature detecting device 1A includes a ring-shaped magnetic body 66 on the outer periphery of the lower portion of the fixed side support member 56 separately from the washer 65, and a coil 70 at the lower portion of the cylindrical storage portion 62b. It is provided on the outer periphery.

And when the movement side support body 53 is located in the uppermost part in the movement range, it comprises so that the coil 70 may be located away from the magnetic body 66, and although not shown in particular, the cooking container 2 is mounted, The coil 70 is configured to be positioned close to the magnetic body 66 when the moving side support 53 moves downward.
Other configurations are the same as those of the temperature detection device 1 shown in FIGS. 2 (a) and 2 (b). In FIG. 3, the portions denoted by the same reference numerals as those in FIGS. 2 (a) and 2 (b) are the same. Or a corresponding part is shown.

  By comprising in this way, the position of the magnetic body 66 can be kept away from a burner part (heating part), and the temperature rise of the magnetic body 66 can be suppressed. Therefore, even when a ferromagnetic material is used as the magnetic material, a decrease in the magnetic permeability due to the temperature of the magnetic material (ferromagnetic material) approaching the Curie temperature is suppressed, and the placement of the cooking container is reliably detected. It becomes possible to do.

  Although not particularly illustrated, it is possible to provide a coil on the stationary support member 56 and a magnetic body on the moving support 53.

  The present invention is not limited to the above embodiment in other points as well, such as the shape and structure of the coil and the magnetic body, the stationary support member, the movable support cylinder, the contact body, the temperature sensor (thermistor), and the like. Various modifications can be made within the scope of the present invention with respect to the specific configuration of each member, the configuration of a cooking device to which the temperature detection device of the present invention is applied, and the like.

1,1A Temperature detector 2 Cooking container (pot etc.)
DESCRIPTION OF SYMBOLS 3 Fixing part of cooker body 4 Insertion hole 5 Burner cap 11 Top plate 12 Gotoku 15 Lead wire for thermistor 33 Mixing tube 41 Burner base 50 Control part (valve control device)
51 Contact body 53 Moving support 53a Small diameter portion of moving support 54 Compression coil spring (biasing means)
56 Fixed-side support member 57 Temperature sensor (thermistor)
62 Temperature sensor fixing member 62a Flange part 62b Cylindrical storage part 63 Outer cylinder (covering protection cylinder)
65 Washer (magnetic material)
66 Magnetic body 70 Coil

Claims (1)

A movable-side support cylinder comprising a fixed-side support member fixed to a fixed portion of the cooking appliance body and a contact body thermally coupled to the temperature sensor, and is movable up and down relative to the fixed-side support member A movable support cylinder provided; and an urging means for urging the movable support cylinder upward with respect to the fixed support member; and the contact body in contact with the bottom surface of the cooking container, A cooking device provided with a temperature detection device configured to move up and down following the vertical movement of the cooking container within the movable range of the moving side support and to contact the bottom surface of the cooking container. ,
A heating unit and a control unit for adjusting the heating energy supply amount to the heating unit;
A magnetic body is provided on one of the moving side support and the fixed side supporting member, and a coil is provided on the other side of the moving side support and the fixed side support member, respectively.
The control unit is configured to detect a current flowing through the coil when a predetermined AC voltage is applied to the coil, and to measure an impedance of the coil with respect to the AC voltage,
When the measured impedance is larger than a predetermined impedance, the cooking container is placed on the abutting body, whereby the moving support is moved downward, and the cooking container is placed. It is comprised so that it may detect. It is the cooking apparatus characterized by the above-mentioned.

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