JP4866445B2 - Temperature sensor unit - Google Patents

Description

  The present invention relates to a temperature sensor unit for detecting the temperature of the bottom surface of a cooking utensil while a cooking utensil such as a pan is mounted on an IH (Induction Heating) cooking heater or the like.

In an induction heating type cooking appliance such as an IH cooking heater, cooking is performed by heating the cooking utensil while a pan or the like being a cooking utensil is placed on the top plate of the cooking utensil. At this time, by detecting the temperature of the bottom of the pan with a temperature sensor provided in the cooker and monitoring the temperature with a controller, whether the inside of the pan is in a temperature state suitable for cooking during cooking, or Whether the bottom of the pan is at an abnormally high temperature is monitored, and the adjustment of the degree of heating, the stop of heating, and the like are controlled.
As the temperature sensor used for such a purpose, a thermistor type is mainly used, and various types of temperature sensors have been proposed.

By the way, in the IH cooking heater without the virtues where a pan is placed like a gas stove, a circular line is drawn at a position corresponding to the heating coil of the top plate as a guide for the position of the pan, but the pan deviates from the line. Even if it does not become unstable because the pan is about to fall from the five virtues like a gas stove. For this reason, the pan may remain largely displaced from the circular line of the top plate. Then, the temperature sensor may not be able to detect the temperature of the pan bottom. As a result, no matter how much the pan is heated, the temperature detected by the temperature sensor does not rise, so the heating continues and the pan may be heated too much.
Therefore, in recent years, in the IH cooking heater, temperature sensors are provided at a plurality of locations to reliably detect the temperature of the pan (for example, see Patent Document 1).

JP 2009-4212 A

However, when a plurality of temperature sensors are provided, it takes time to attach the temperature sensors, leading to an increase in manufacturing cost of the IH cooking heater.
Also, if any temperature sensor breaks, not only remove the temperature sensor itself attached to the frame or bracket of the IH cooking heater, but also connect the lead wire connected to the temperature sensor from the connector on the controller side of the IH cooking heater. Must be removed. For this reason, even in the event of a failure, it takes time and money to deal with it.
The present invention has been made based on such a technical problem, and an object of the present invention is to provide a temperature sensor unit that can be easily attached and detached.

The present invention made for this purpose is a temperature sensor unit used in an induction heating cooker provided with an annular coil that generates a magnetic field by being energized to heat a cooking vessel. , A one or more sensor adapters mounted so as to extend radially with respect to the outer periphery of the holder, and a temperature at which the temperature of the cooking container provided on the surface of the sensor adapter and heated by a coil is detected And a buffer layer that has a cushioning property and presses the temperature detection element against the top plate of the cooking appliance. A sensor mounting portion to which the sensor adapter is mounted is formed on the outer periphery of the holder. characterized in that is a plan view a rectangular plate shape, its one end is a temperature detection unit, the other end, there is a holder mounting portion which is a detachably mounted to the sensor mounting portion To.
Thus, the sensor adapter provided with the temperature detection element is attached to the holder to be unitized, whereby the unit can be easily assembled to the induction heating cooker.
Further, by attaching the sensor adapter to the holder, the temperature detecting element can be provided without variation in position.
In addition, by preparing a plurality of types of sensor adapters having different lengths, a plurality of types of temperature sensor units in which the positions of the temperature detection elements are varied in the radial direction of the coil can be configured.

  Such a temperature sensor unit can be provided with a second temperature detection element located at the center of the inner space of the coil on the surface of the holder.

  Here, it is preferable to form an attachment portion for fixing the holder to the induction heating cooker on the back surface of the holder.

  It is preferable that the length of the sensor adapter is set so that the temperature detection element of the sensor adapter is disposed above the inner peripheral side of the coil.

  When a plurality of sensor adapters are provided, the lead wires connected to the temperature detection elements of these sensor adapters are preferably connected to one connector. As a result, it is possible to reduce the labor for connecting the lead wires and prevent erroneous wiring.

According to the present invention, the sensor adapter provided with the temperature detection element is attached to the holder and unitized, whereby the assembly to the induction heating cooker can be easily performed for each unit, and the assembly of the induction heating cooker can be performed. Efficiency can be improved.
Moreover, since it is only necessary to replace the entire temperature sensor unit at the time of replacement, this can be easily performed.
Furthermore, by preparing a plurality of types of sensor adapters having different lengths, a plurality of types of temperature sensor units in which the positions of the temperature detection elements are varied in the radial direction of the coil can be configured.

It is sectional drawing which shows the structure of the cooking device in this Embodiment. It is a perspective view of a temperature sensor unit. (A) is a top view of a holder, (b) is AA sectional drawing of (a), (c) is a side view of a holder, (d) is a bottom view of a holder. It is a perspective view which shows the principal part of a holder. It is a perspective view which shows a sensor adapter. (A) is a top view of a sensor adapter, (b) is a BB sectional view of (a), (c) is a side view of the sensor adapter, and (d) is a bottom view of the sensor adapter.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a diagram for explaining a configuration of a temperature sensor unit 10 in the present embodiment.
As shown in FIG. 1, the IH cooking heater induction heating cooker 100 includes a coil that is formed in an annular shape and is located in a plane parallel to the top plate 101, close to the lower surface side of the top plate 101 that forms the upper surface thereof. 110 is provided.
The temperature sensor unit 10 is disposed in the central opening 110 a of the annular coil 110.

  As shown in FIG. 1 and FIG. 2, the temperature sensor unit 10 is provided in the center portion of the holder 20, the sensor adapter 30 that is detachably mounted on the outer peripheral portion of the holder 20, and the holder 20. And a center sensor 50. In the present embodiment, three sensor adapters 30 are provided on the outer peripheral portion of the holder 20 at equal intervals in the circumferential direction. Of course, the number is not limited to this.

  As shown in FIGS. 3 and 4, the holder 20 is made of a resin or the like and has a substantially disk shape. A holding portion (attachment portion) 21 held by a bracket (not shown) of the IH cooking heater 100 is formed on the lower surface 20 a of the holder 20. Is formed.

  A sensor mounting portion 22 to which the sensor adapter 30 is mounted is formed on the outer periphery of the holder 20. The sensor mounting portion 22 is formed with a pair of guide grooves 23 and 23 that are parallel to each other and have a predetermined length. Between these guide grooves 23, 23, a holding groove 24 that opens to the lower surface 20 a side of the holder 20 is formed. That is, between the guide grooves 23, 23, a holding portion 25 having a substantially inverted U-shaped cross section that forms the side surface and the bottom surface of the holding groove 24 is formed.

  Further, on the outside of the guide grooves 23, 23, planar step portions 26, 26 are formed that are lower than the upper surface 20 b of the holder 20 and higher than the bottom surfaces of the guide grooves 23, 23. Engaging grooves 27 and 27 are formed at predetermined positions of the step portions 26 and 26 to engage with engaging claws 45 described later. In the step portions 26, 26, slide grooves 28, 28 extending toward the outer peripheral side of the holder 20 are formed continuously with the engagement grooves 27, 27. The slide grooves 28, 28 are formed shallower than the engagement grooves 27, 27, and in a portion facing the outer peripheral portion of the holder 20, an inclined surface 28 a whose depth gradually expands toward the outer peripheral side of the holder 20. Has been.

  As shown in FIGS. 5 and 6, the sensor adapter 30 has a rectangular plate shape in plan view, and one end side thereof is a temperature detection unit 31. The temperature detection unit 31 is formed on the surface of the IH cooking heater 100 facing the top plate 101 in a state where the sensor adapter 30 is mounted on the holder 20, and is pressed against the lower surface of the top plate 101. The temperature detection unit 31 includes a buffer layer 33 made of ceramic paper having a cushioning property (a material made of a ceramic-based material) and a thermistor element (temperature detection element) 34 on an upper surface of a resin unit main body 32. The heat sensitive layer 35 made of, for example, a rubber-based material and the protective layer 36 covering the buffer layer 33, the thermistor element 34, and the heat sensitive layer 35 are stacked. ing. The buffer layer 33 presses the thermistor element 34 against the lower surface of the top plate 101 due to its cushioning property. The heat sensitive layer 35 is for improving the temperature sensitive performance of the thermistor element 34 by absorbing heat on the lower surface side of the top plate 101. The protective layer 36 can be formed by an adhesive tape, and can be formed by winding and sticking the adhesive tape around the unit body 32.

  One end of dumet wires 37, 37 is connected to both poles of the thermistor element 34. The other ends of the dumet wires 37 and 37 are welded to metal plates 38 and 38 provided on the lower surface of the sensor adapter 30 on the other end side, respectively.

  Then, one end of the lead wires 39, 39 is welded to the metal plates 38, 38, whereby the dumet wires 37, 37 and the lead wires 39, 39 are electrically connected.

  The other end side of the sensor adapter 30 is a holder mounting portion 41 that can be detachably mounted on the sensor mounting portion 22 of the holder 20. The holder mounting portion 41 has a cross-sectional shape that can be inserted into the guide grooves 23, 23 and extends in parallel to each other, and is formed between the first guide portions 42, 42 and is formed in the holding groove 24. It has the 2nd guide part 43 made into the cross-sectional shape which can be inserted.

  In order to avoid interference with the holding portion 25 when the first guide portions 42 and 42 are inserted into the guide grooves 23 and 23, the corner portions 42a and 42a of the tip portions thereof are chamfered.

  The second guide portion 43 has a cross-sectional shape corresponding to the holding groove 24 with a certain length of the distal end portion 43 a. A stepped portion 44 is formed on the side of the base end portion 43b of the second guide portion 43 because the cross-sectional area is larger than that of the tip end portion 43a.

  The metal plates 38 and 38 protrude from the first guide portions 42 and 42 outward in the short-side direction of the sensor adapter 30, and the distal end portions thereof are bent downward, so that the L-shaped cross section is formed. Engaging claws 45 are formed. The engaging claw 45 has a downward projecting height that gradually increases from the other end side to the one end side of the sensor adapter 30, and when inserted into the sensor mounting portion 22, the inclined surface 28 a of the slide grooves 28, 28. , 28a can be easily carried on and slid.

  In addition, lead wires 39 and 39 are passed through slits 46 and 46 formed between the first guide portions 42 and 42 and the second guide portion 43, and are led downward of the sensor adapter 30. Yes.

In such a sensor adapter 30, the holder mounting portion 41 is inserted into the sensor mounting portion 22 of the holder 20 along the longitudinal direction of the sensor adapter 30. Then, the first guide portions 42 and 42 slide on the slide grooves 23 and 23, and the second guide portion 43 is inserted below the holding groove 24. In this state, the lower surfaces of the first guide portions 42 and 42 are supported by the slide grooves 23 and 23, and the upper surface of the second guide portion 43 is supported by the holding groove 24, so that the sensor adapter 30 rotates in the vertical direction. It is restrained not to move. Further, the side surfaces of the first guide portions 42 and 42 and the second guide portion 43 abut against the slide grooves 23 and 23 and the holding groove 24, so that the sensor adapter 30 is restrained from rotating in a plane along the surface of the holder 20. Is done.
Further, the amount of insertion of the sensor adapter 30 into the sensor mounting portion 22 is regulated by the stepped portion 44 abutting against the holding portion 25.

  Further, when the holder mounting portion 41 of the sensor adapter 30 is inserted into the sensor mounting portion 22 of the holder 20 as described above, the engaging claws 45, 45 are formed in the slide grooves 28, 28 formed in the step portion 26. It rides on the inclined surfaces 28a, 28a and elastically deforms upward. When the sensor adapter 30 is further pushed in, the engaging claws 45, 45 slide into the slide grooves 28, 28. When the stepped portion 44 hits the holding portion 25, the engaging claws 45, 45 are fitted into the engaging grooves 27, 27, so that the sensor adapter 30 is not easily detached from the holder 20. .

  Further, the lead wires 39 and 39 are led out downward from the gap between the holding portion 25 and the end portions of the slits 46 and 46 in a state where the stepped portion 44 is in contact with the holding portion 25.

  The sensor adapter 30 thus mounted on the holder 20 can be disengaged between the engagement claws 45 and 45 and the engagement grooves 27 and 27 by twisting the tip end upward, and the sensor adapter 30 is left as it is. Can be removed from the holder 20.

  As shown in FIGS. 2 and 4, the center sensor 50 can have the same configuration as the temperature detection unit 31 of the sensor adapter 30. That is, on the upper surface of the sensor body 52 made of resin, a buffer layer 53 made of a ceramic paper having a cushioning property (ceramic material made into a fiber) or the like, a thermistor element (second temperature detecting element) 54, The thermistor element 54 is provided so as to cover it, and is formed by laminating a heat-sensitive layer 55 made of, for example, a rubber material, and a buffer layer 53, the thermistor element 54, and a protective layer 56 covering the heat-sensitive layer 55. .

  The buffer layer 53 presses the thermistor element 54 against the lower surface of the top plate 101 due to its cushioning property. The heat sensitive layer 55 is for improving the temperature sensitive performance of the thermistor element 54 by absorbing heat on the lower surface side of the top plate 101. The protective layer 56 can be formed of an adhesive tape, and can be formed by attaching the adhesive tape to the sensor body 52.

  The center sensor 50 is fixed by a sensor main body 52 being fitted into and bonded to a recess 29 formed at the center of the upper surface of the holder 20.

One end of dumet wires 57 and 57 is connected to both poles of the thermistor element 54. The other ends of the dumet wires 57 and 57 are welded to metal plates 58 and 58 provided on the outer peripheral portion of the upper surface of the holder 20, respectively.
One end of the lead wires 59, 59 is welded to the metal plates 58, 58, whereby the dumet wires 57, 57 and the lead wires 59, 59 are electrically connected.

  The lead wires 59 are guided to the lower surface side of the holder 20 through a through hole 60 formed in the holder 20.

  On the lower surface side of the holder 20, the lead wires 39 and 39 of each sensor adapter 30 and the lead wires 59 and 59 of the center sensor 50 are connected to one connector (not shown).

As shown in FIG. 1, such a temperature sensor unit 10 is configured such that the holding portion 21 is fitted into a bracket (not shown) of the IH cooking heater 100 in a state where the sensor adapter 30 is mounted on the outer peripheral portion of the holder 20. It is attached to the cooking heater 100. A connector (not shown) is connected to a controller-side connector (not shown) of the IH cooking heater 100.
In this state, the center sensor 50 is located at the center of the space inside the coil 110 of the IH cooking heater 100, and each sensor adapter 30 protruding from the holder 20 to the outer periphery protrudes above the coil 110, thereby detecting the temperature. 31 is located above the inner peripheral side of the coil 110.

  The controller of the IH cooking heater 100 detects the temperature by pressing the thermistor elements 34 and 54 of the sensor adapters 30 and the center sensor 50 against the lower surface of the top plate 101, so that the bottom of the cooking container on the top plate 101 of the IH cooking heater 100 is detected. The temperature is detected and the heating temperature is controlled.

The temperature sensor unit 10 described above is a unit in which the sensor adapter 30 and the center sensor 50 that detect the temperature at the inner peripheral portion and the center portion of the coil 110 that generates heat are integrally provided. Assembling can be performed easily and efficiently.
Also, when replacing parts due to a failure or the like, the temperature sensor unit 10 can be replaced as a unit, which can be easily performed.

  In addition, since the lead wires 39 and 39 of the plurality of sensor adapters 30 and the lead wires 59 and 59 of the center sensor 50 are connected to one connector (not shown), an error may occur when the temperature sensor unit 10 is assembled. Wiring can be prevented.

  Furthermore, since the sensor adapter 30 can be attached to the holder 20 with a single touch, the temperature sensor unit 10 can be easily assembled, and the thermistor elements 34 of the sensor adapters 30 can be provided without variation in position.

In addition, by preparing a plurality of types of sensor adapters 30 having different lengths, a plurality of types of temperature sensor units in which the position (diameter) of the thermistor element 34 is different simply by changing the type of the sensor adapter 30. 10 can be configured. Thereby, the temperature sensor unit 10 of the optimal size can be provided according to the diameter of the coil 110 provided in the IH cooking heater 100.
Even if the types of the diameters of the coils 110 increase, it is only necessary to prepare sensor adapters 30 having different lengths, so that it is possible to cope with this at a low cost.

In the above embodiment, the configuration of each part of the temperature sensor unit 10 has been described in detail. However, the number and shape of the sensor adapter 30, the structure for mounting the sensor adapter 30 and the holder 20, and the like are appropriately changed. It can be configured.
Moreover, the temperature detection method in the temperature detection part 31 of the sensor adapter 30 and the center sensor 50 can also be made into another system suitably.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

  DESCRIPTION OF SYMBOLS 10 ... Temperature sensor unit, 20 ... Holder, 21 ... Holding part (attachment part), 22 ... Sensor mounting part, 30 ... Sensor adapter, 31 ... Temperature detection part, 34 ... Thermistor element (temperature detection element), 39, 59 ... Lead wire, 50 ... center sensor, 54 ... thermistor element (second temperature detection element), 100 ... IH cooking heater (induction heating cooker), 101 ... top plate, 110 ... coil

Claims (5)

A temperature sensor unit used in an induction heating cooker provided with an annular coil for generating a magnetic field by being energized to heat a cooking vessel,
A holder disposed inside the coil;
One or more sensor adapters mounted to extend radially to the outer periphery of the holder;
A temperature detection element that is provided on the surface of the sensor adapter and detects the temperature of the cooking vessel heated by the coil;
A cushioning layer, and a buffer layer that presses the temperature detecting element against a top plate of the cooking appliance.
A sensor mounting portion to which the sensor adapter is mounted is formed on the outer peripheral portion of the holder,
The sensor adapter has a rectangular plate shape in plan view, one end of which is a temperature detection unit, and the other end is a holder mounting unit that can be detachably mounted on the sensor mounting unit. A temperature sensor unit.   2. The temperature sensor unit according to claim 1, wherein a second temperature detection element is provided on a surface of the holder, the second temperature detection element being located in a central portion of an inner space of the coil.   The temperature sensor unit according to claim 1 or 2, wherein a mounting portion for fixing the holder to the induction heating cooker is formed on the back surface of the holder.   4. The length of the sensor adapter is set so that the temperature detection element of the sensor adapter is disposed above the inner peripheral side of the coil. 5. The temperature sensor unit described in 1.   The said sensor adapter is provided with two or more, The lead wire connected to the said temperature detection element of these said sensor adapters is connected to one connector, The Claim 1 characterized by the above-mentioned. Temperature sensor unit.

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