JP2018013313A - Gas cooking stove with temperature detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely detect a temperature of a cooking container by properly keeping contact between a temperature detection element and the cooking container when boiling-over occurs from the cooking container.SOLUTION: When a cooking container is placed on a trivet and a moving side support 53 moves downward, a second core 70C approaches a magnetic gap G, a magnetic circuit closed by a first core 66C and the second core 70C is formed, a primary coil and a secondary coil are magnetically connected, and electric power is supplied to a temperature detection device side control part 70A via the primary coil and the secondary coil from a control part 50. When detection temperature data by a temperature detection element 57 is input into the secondary coil by the temperature detection device side control part 70A, the control part controls fire power of a cooking stove burner on the basis of temperature data output from a demodulation part 50a demodulating an AC voltage output to the first primary coil, and when detection temperature data is not output from the demodulation part 50a, burning by the cooking stove burner is not performed on determining that the cooking container is not placed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gas stove, and more particularly, to a gas stove including a temperature detection device configured to be able to detect the temperature of a cooking container such as a pan placed on the gas stove.

  Some cooking devices such as a gas stove include a temperature detection device that detects the temperature in contact with the bottom surface of a cooking container such as a pan.

  In Patent Document 1, as such a temperature detection device, a thermistor as a temperature detection element provided with a moving side support member and a fixed side support member and disposed on the upper end side of the moving side support member is provided as a contact body. The temperature detection apparatus comprised so that the temperature of the bottom part of a cooking container may be detected via is disclosed.

  Patent Document 1 discloses a gas table (gas stove) provided with the temperature detection device. And in the gas stove provided with the temperature detection apparatus shown by patent document 1, although there is no specific description, the lead wire connected to the thermistor goes through the middle wiring arrange | positioned in a gas stove main body. Then, it is connected to the control unit.

JP2012-233601A

  By the way, when cooking cooking is performed by heating a cooking container such as a pan with a stove burner, spilling from the cooking container may occur, and the spilled broth may adhere to the wiring (intermediate wiring) arranged in the gas stove body. . And in such a case, there is no possibility that moisture will evaporate from the broth adhering to the midway wiring and the midway wiring will adhere to the gas stove body.

  If the wiring is fixed to the gas stove body in the middle, the moving support member that constitutes the temperature detection device will not smoothly move up and down, and the abutting portion of the temperature detection device and the bottom surface of the cooking container will be sufficiently applied. There is a possibility that the temperature of the cooking container cannot be properly detected without being brought into contact. And when the temperature of a cooking container cannot be detected appropriately, there exists a problem that it will become difficult to perform the thermal power control of the stove burner performed based on the detected temperature of a temperature detection apparatus.

  The present invention solves the above-mentioned problem, and when a spill occurs from a cooking container, for example, a temperature detection unit including a temperature detection element such as the above-described contact part and thermistor, and a bottom surface of the cooking container An object of the present invention is to provide a gas stove equipped with a temperature detection device that can maintain the contact with the container properly and can detect the temperature of the cooking container accurately and reliably.

In order to solve the above problems, a gas stove equipped with the temperature detection device of the present invention,
An annular stove burner provided so that a flame hole portion formed on the outer periphery of the gas stove main body through the opening for the burner formed on the upper surface of the top plate protrudes above the top plate, and the point of the stove burner A control unit that controls fire extinguishing and heating power, a virtues on which a cooking container heated by the stove burner is placed, and a temperature detection device that detects a bottom surface temperature of the cooking container,
The temperature detecting device is fixed to an arbitrary fixing portion of the gas stove body and extends in the vertical direction. The temperature detecting device is inserted into the fixing side supporting member, and is biased upward and can be moved up and down. A cylindrical moving-side support supported on the top and a top end of the moving-side support, and is always in contact with the bottom surface of the cooking container by moving up and down following the vertical movement of the cooking container. A gas stove comprising: a contact body configured as described above; and a temperature detection element disposed on the lower surface side of the contact body in such a manner as to be thermally coupled to the contact body,
A first core mounting region made of a non-magnetic material provided in the stationary support member;
A first core comprising a magnetic gap disposed in the first core mounting region and made of a ferromagnetic material, wherein the ferromagnetic material is partially lost;
A second core mounting region provided in the moving side support, made of a non-magnetic material, and a second core mounting region that moves up and down in conjunction with the vertical movement of the moving side support;
A second core made of a ferromagnetic material disposed in the second core mounting region;
A primary winding connected to the control unit and having the first core as its magnetic core;
A secondary winding whose magnetic core is the second core;
A temperature detection device side control unit disposed in the second core mounting region, to which the secondary winding and the temperature detection element are connected;
A demodulator that demodulates the AC voltage output to the primary winding when temperature data detected by the temperature detection element is input to the secondary winding by the temperature detection device side control unit;
When the cooking container is placed on the five virtues and the movable support moves downward, the second core is close to the magnetic gap of the first core, and the first core and the A closed magnetic path is formed by the second core, and the primary winding and the secondary winding are electromagnetically coupled to each other from the control unit via the primary winding and the secondary winding. And configured to supply power to the temperature detection device side control unit,
Based on the temperature data output from the demodulator, the control unit controls the heating power of the stove burner,
When detection temperature data by the temperature detection element is not output from the demodulator, the control unit determines that the cooking container is not placed on the virtues, and does not burn the stove burner. It is characterized by being composed.

  In the gas stove provided with the temperature detection device of the present invention, the first core and the primary winding are disposed on the lower end side of the fixed-side support member, and the second core, the secondary winding, and It is preferable that the temperature detection device side control unit is disposed on a lower end side of the moving side support.

  Since the gas stove provided with the temperature detection device of the present invention is configured as described above, it is not necessary to connect the moving side support member and the control unit with a lead wire, and a spill from the cooking container occurs. In addition, it is possible to prevent the lead wire from adhering to the gas stove main body by the broth spilled from the cooking container and hindering the smooth vertical movement of the moving side support member.

  As a result, even when a spill occurs from the cooking container, the contact between the contact body of the temperature detection device and the bottom surface of the cooking container is properly maintained, and the temperature of the cooking container can be accurately detected. A gas stove with high reliability can be obtained.

  Moreover, since the stove burner is not burned when the cooking container is not placed on Gotoku, it is possible to realize an economical gas stove that does not waste energy.

  In addition, the first core and the primary winding are disposed on the lower end side of the fixed side support member, and the second core, the secondary winding and the temperature detection device side control unit are disposed on the lower end side of the moving side support body. In this case, the contact body that contacts the cooking container is provided at the upper end of the movable support, so the first core, the primary winding and the second core, the secondary winding, and the temperature detection device side It is possible to improve the reliability by suppressing the controller from being heated to a high temperature by heating the stove burner.

It is a principal part side view of the gas stove provided with the temperature detection apparatus concerning embodiment of this invention. It is a partially notched front view which shows the principal part structure of the temperature detection apparatus used for the gas stove concerning embodiment of this invention. It is a partial notch front sectional view which shows the principal part structure in the non-mounting state of the cooking container on Gotoku of the temperature detection apparatus used for the gas stove concerning embodiment of this invention. It is a plane sectional view showing the important section composition of the temperature detector used for the gas stove concerning the embodiment of the present invention. It is a partial notch front sectional view which shows the principal part structure in the mounting state of the cooking container on Gotoku of the temperature detection apparatus used for the gas stove concerning embodiment of this invention.

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

  As shown in FIG. 1, a temperature detection device 1 used in a gas stove according to an embodiment of the present invention is disposed in a burner portion of a gas stove (heating cooking appliance), and controls the temperature of a cooking container 2 such as a pan. This is a temperature detection device used for detection.

  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.

  In addition, 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, the temperature detection device 1 is provided. The structure of one burner part 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.

  Moreover, in the gas stove provided with the temperature detection device according to this embodiment, the control unit (main body side control unit) 50 (FIG. 1) performs heating by the stove burner 10 based on the operation of a point fire extinguishing operation unit (not shown). Control is configured to be performed.

  Next, the temperature detection device 1 disposed in the burner portion will be described. FIG. 2 is a partially cutaway front view of the temperature detection device 1.

  As shown in FIG. 2, the temperature detection device 1 of this embodiment includes a cylindrical fixed-side support member 56 that is fixed to a fixing portion 3 (FIG. 1) of a gas stove main body (cooker main body) 9, and this fixed side. A cylindrical moving-side support body (moving-side support cylinder) 53 is mounted on the support member 56 so as to be slidable up and down.

  When the cooking container 2 is placed on the virtues 12, the movable support 53 moves downward, and when the cooking containers 2 are removed from the virtues 12, the movable support 53 is biased by the spring 54. It is configured to move upward and return to the state of FIG.

  On the lower surface side of the contact body 51 provided at the upper end of the moving side support 53, a thermistor fixing member 62 having 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 detecting element is incorporated in the cylindrical housing portion 62b of the thermistor fixing member 62.

<Characteristic configuration>
In the gas stove provided with the temperature detection device according to this embodiment, as shown in FIGS. 1 to 3, the outer peripheral region on the lower end side of the cylindrical fixed-side support member 56 is a first core mounting region made of a nonmagnetic material. The first core mounting region 166 includes a first core 66 </ b> C that is made of a ferromagnetic material and includes a magnetic gap G partially lacking the ferromagnetic material. .

  Further, the inner space on the lower end side of the cylindrical moving support 53 functions as a second core mounting region 170 made of a non-magnetic material, and the second core mounting region 170 is configured to move up and down of the moving support 53. It is configured to move up and down in conjunction with each other. The second core mounting area 170 is provided with a second core 70C made of a ferromagnetic material.

  Further, a primary winding 66 (FIG. 4) is wound around the first core 66C in such a manner that the first core 66C serves as a magnetic core thereof. Main body side control unit) 50 (FIG. 1).

  Further, the secondary winding 70 is wound around the second core 70C disposed on the lower end side of the cylindrical moving support 53 in such a manner that the second core 70C serves as the magnetic core. The secondary winding 70 is connected to a temperature detection device side control unit 70A to which a thermistor (temperature detection element) 57 is connected.

  That is, in the gas stove provided with the temperature detection device according to this embodiment, as shown in FIG. 2, the temperature detection device side is provided in the internal space on the lower end side of the cylindrical moving side support 53 constituting the temperature detection device. The controller 70A is disposed, and the thermistor (temperature detection element) 57 is disposed on the temperature detection device side disposed in the inner space on the lower end side of the movable support 53 via the thermistor lead wires 15a and 15b. It is connected to the control unit 70A.

  Further, the gas stove equipped with the temperature detection device according to this embodiment is configured such that when temperature data detected by the thermistor (temperature detection element) 57 is input to the secondary winding 70 by the temperature detection device side control unit 70A, the primary winding. A demodulator 50a (see FIGS. 1 and 2) for demodulating the AC voltage output to the line 66 (FIG. 4) is provided.

  Further, when the cooking container 2 is placed on the five virtues 12 and the moving support 53 moves downward, the second core 70C comes close to the magnetic gap G, and the first core 66C and the second core 70C A closed magnetic path is formed.

  That is, when the cooking container 2 is placed on the virtues 12 and the movable support 53 moves downward (see FIG. 5), the primary winding 66 and the secondary winding 70 are electromagnetically coupled, and the control unit Electric power is supplied from the (main body side control unit) 50 to the temperature detection device side control unit 70A via the primary winding 66 and the secondary winding 70.

  That is, an AC voltage having a predetermined power supply frequency (for example, 400 Hz) is applied from the control unit (main body side control unit) 50 to the primary winding 66, and the AC voltage generated in the secondary winding 70 is controlled by the temperature detection device side control. The electric power for the temperature detection device side control unit 70A is obtained by being rectified by the unit 70A.

  Thus, temperature data detected by the thermistor (temperature detection element) 57 is input to the secondary winding 70 by the temperature detection device side control unit 70A. Specifically, a signal obtained by modulating alternating current of a predetermined data transmission frequency (for example, 5 kHz) with a carrier wave and modulating the carrier wave of 5 kHz with data relating to a temperature detected by the thermistor (temperature detection element) 57 is supplied to the secondary winding 70. Input in a superimposed manner.

  Moreover, in the gas stove provided with the temperature detection device according to this embodiment, the control unit (main body side control unit) 50 controls the heating power of the stove burner 10 based on the temperature data output from the demodulation unit 50a. When temperature data detected by the thermistor (temperature detection element) 57 is not output from the demodulator 50a, the control unit 50 determines that the cooking container 2 is not placed on the virtues 12, and burns the burner 10. Is configured to not.

  That is, when the cooking container 2 is not placed on the virtues 12, the second core 70C is positioned above the magnetic gap G, so that the primary winding 66 and the secondary winding 70 are electromagnetically coupled. Is not easily supplied from the control unit 50 to the temperature detection device side control unit 70A via the primary winding 66 and the secondary winding 77. Therefore, the temperature detection device side control unit 70A Even if temperature data detected by the thermistor (temperature detection element) 57 is input to the secondary winding 70, data about the detected temperature detected by the thermistor (temperature detection element) 57 is output to the primary winding 66. Therefore, the controller 50 determines that the cooking container 2 is not placed on the virtues 12, and the combustor 10 is not combusted.

  As described above, in the gas stove provided with the temperature detection device according to this embodiment, the moving side support 53 and the control unit (main body side control unit) 50 are not connected by the lead wire. As described above, the occurrence of an event of sticking to the gas stove main body 9 by the broth from which the lead wire connecting the moving side support 53 and the main body side control unit 50 is blown is avoided. As a result, even when spilling from the cooking container 2 occurs, the contact between the contact body 51 constituting the temperature detection device 1 and the bottom surface of the cooking container 2 is properly maintained, and the temperature of the cooking container 2 is accurately adjusted. Can be detected well.

  In addition, when the cooking container 2 is not placed on the virtues 12, since the burner is not burned, it is possible to realize an economical gas stove without consuming energy wastefully.

  Further, the first core 66C and the primary winding 66 are disposed on the lower end side of the fixed-side support member 56, and the second core 70C, the secondary winding 70, and the temperature detection device side control unit 70A are connected to the moving-side support body. 53, the contact body 51 located at the upper end of the movable support 53 is in contact with the bottom surface of the cooking vessel 2 and is heated by the flame of the stove burner (gas burner) 10. Even when the temperature is increased, the primary winding 66, the secondary winding 70, and the temperature detection device side control unit 70A are suppressed from being heated to high temperatures by the heating of the stove burner 10, and the reliability is improved.

  Therefore, according to the present invention, it is possible to provide a gas stove equipped with a highly reliable temperature detection device with high temperature detection reliability, low energy waste, and high reliability.

In the above embodiment, the case where the moving side support is cylindrical has been described as an example. However, the moving side support is not limited to a cylindrical shape, and may be a rectangular tube.
Moreover, although the cylindrical support was used as the fixed side support, it is not limited to the cylindrical shape but may be a rectangular tube.

  The present invention is not limited to the above-described embodiment, and the primary winding, the secondary winding, the primary core, the shape and structure of the secondary core, the fixed side support member, the movable side support, the contact body, Various modifications can be made within the scope of the present invention with respect to the specific configuration of each member such as the temperature detecting element.

DESCRIPTION OF SYMBOLS 1 Temperature detection apparatus 2 Cooking container 3 Fixing part of the gas stove main body 4 Insertion hole 5 Burner cap 9 Gas stove main body 10 Comb burner 11 Top plate 12 Gotoku 15a, 15b Thermistor lead wire 33 Mixing tube 41 Burner base 50 Control part (main body side control) Part)
50a Demodulator 51 Contact body 53 Moving support 53a Small diameter portion of cylindrical moving support 54 Spring (biasing means)
56 Fixed Support Member 57 Temperature Detection Element (Thermistor)
62 Temperature detection element fixing member 62a Flange portion 62b Tubular storage portion 66 Primary winding 66C First core 70 Secondary winding 70A Temperature detection device side control portion 70C Second core 70C
166 First core mounting area 170 Second core mounting area G Magnetic gap

Claims (2)

An annular stove burner provided so that a flame hole portion formed on the outer periphery of the gas stove main body through the opening for the burner formed on the upper surface of the top plate protrudes above the top plate, and the point of the stove burner A control unit that controls fire extinguishing and heating power, a virtues on which a cooking container heated by the stove burner is placed, and a temperature detection device that detects a bottom surface temperature of the cooking container,
The temperature detecting device is fixed to an arbitrary fixing portion of the gas stove body and extends in the vertical direction. The temperature detecting device is inserted into the fixing side supporting member, and is biased upward and can be moved up and down. A cylindrical moving-side support supported on the top and a top end of the moving-side support, and is always in contact with the bottom surface of the cooking container by moving up and down following the vertical movement of the cooking container. A gas stove comprising: a contact body configured as described above; and a temperature detection element disposed on the lower surface side of the contact body in such a manner as to be thermally coupled to the contact body,
A first core mounting region made of a non-magnetic material provided in the stationary support member;
A first core comprising a magnetic gap disposed in the first core mounting region and made of a ferromagnetic material, wherein the ferromagnetic material is partially lost;
A second core mounting region provided in the moving side support, made of a non-magnetic material, and a second core mounting region that moves up and down in conjunction with the vertical movement of the moving side support;
A second core made of a ferromagnetic material disposed in the second core mounting region;
A primary winding connected to the control unit and having the first core as its magnetic core;
A secondary winding whose magnetic core is the second core;
A temperature detection device side control unit disposed in the second core mounting region, to which the secondary winding and the temperature detection element are connected;
A demodulator that demodulates the AC voltage output to the primary winding when temperature data detected by the temperature detection element is input to the secondary winding by the temperature detection device side control unit;
When the cooking container is placed on the five virtues and the movable support moves downward, the second core is close to the magnetic gap of the first core, and the first core and the A closed magnetic path is formed by the second core, and the primary winding and the secondary winding are electromagnetically coupled to each other from the control unit via the primary winding and the secondary winding. And configured to supply power to the temperature detection device side control unit,
Based on the temperature data output from the demodulator, the control unit controls the heating power of the stove burner,
When detection temperature data by the temperature detection element is not output from the demodulator, the control unit determines that the cooking container is not placed on the virtues, and does not burn the stove burner. A gas stove equipped with a temperature detection device characterized by being configured. The first core and the primary winding are disposed on a lower end side of the fixed side support member, and the second core, the secondary winding, and the temperature detection device side control unit are arranged on the moving side support body. The gas stove provided with the temperature detection device according to claim 1, wherein the gas stove is disposed on a lower end side.

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