JP2011054475A - Electromagnetic induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic induction heating cooker capable of alleviating effects to an infrared sensor due to heat generation of a heating coil. <P>SOLUTION: The electromagnetic induction heating cooker is provided with a body case of a box shape of which the upper part is open, a top plate which covers the upper opening of the body case and on which a heated object can be mounted, a heating coil unit which is arranged below the top plate in the body case and has a heating coil holding member for holding the heating coil made of a multiplex coil of a concentric circle shape, and a plurality of temperature detecting means for detecting a temperature of the heated object. Out of the plurality of the temperature detecting means, at least one is an infrared sensor of a noncontact system for detecting infrared rays radiated from the heated object, and the top plate has a light shielding coating or printing applied and has a non-shielded portion through which the infrared rays can transmit, and the infrared sensor is installed below the non-shielded portion of the top plate so as to cover a part of the heating coil near the non-shielded portion and on an outer side than the infrared sensor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cooking device for cooking with an electromagnetic induction heating source. The induction heating type cooking device targeted by the present invention is a so-called stationary type installed on kitchen furniture (not shown) such as a kitchen sink and kitchen furniture. The present invention relates to both types of built-in type or built-in type used by being installed in an installation space.

  In a conventional electromagnetic induction heating cooker, “the heating coil 5 is placed on a coil support plate 6 formed of a heat-resistant resin,..., Below the coil support plate 6, the center of the heating coil 5. The sensor unit 7 for detecting the temperature of the bottom of the cooking container P located on the near side (same as viewed from the cook side) is provided.

JP2009-59592A (5th page, FIG. 4)

  As described in Patent Document 1, the sensor unit that detects infrared rays for detecting the temperature of the bottom of the cooking container is disposed in the vicinity of the heating coil unit or directly in the heating coil unit.

  However, in an electromagnetic induction heating cooker, the heating coil itself becomes hot during heating, and the infrared sensor unit is disposed in the vicinity of the heating coil unit or directly on the heating coil unit. The sensor unit might become hot due to the influence. For this reason, operation | movement of the infrared sensor became unstable and there existed a possibility that temperature detection performance might fall.

  Then, when the temperature of the bottom of the cooking container is detected by the infrared sensor, the infrared light must be transmitted through the top plate on which the cooking container is placed. Therefore, the top plate where the infrared sensor is arranged is painted or printed. It is necessary to provide a window-like non-hiding part. Then, a non-hiding part will be provided in the vicinity of the heating coil unit, and there may be a case where the assembly line constituting the heating coil can be visually recognized from the non-hiding part, which may give anxiety and discomfort to the user. There was sex.

  The present invention has been made to solve the above-described problems, and a first object thereof is to obtain an electromagnetic induction heating cooker that can reduce the influence on the infrared sensor due to heat generated by the heating coil.

  Moreover, the 2nd objective is to obtain the electromagnetic induction heating cooking appliance which can ensure the detection performance of an infrared sensor, without making a user visually recognize a heating coil from the non-hidden part of a top plate.

  An electromagnetic induction heating cooker according to the present invention includes a box-shaped main body case having an upper opening, a top plate that covers the upper surface opening of the main body case and on which an object to be heated can be placed, and a lower portion of the top plate in the main body case. A heating coil unit, a heating coil unit having a heating coil composed of concentric multiple coils, and a heating coil holding member for holding the heating coil, and a heating coil holding member arranged substantially concentrically between the multiple coils of the heating coil. And a plurality of temperature detection means for detecting the temperature of the object to be heated placed on the plate, and at least one of the plurality of temperature detection means detects a infrared ray emitted from the object to be heated. In the infrared sensor, the top plate is light-shielding painted or printed on the back side of the surface on which the object is to be heated, and a non-hidden part that can transmit infrared rays is provided in part. Is located below the section, In concealing the vicinity is prepared by attaching the shield to cover a portion of the heating coil located outside the infrared sensor.

  In the present invention, since the shield is attached so as to cover a part of the heating coil located outside the infrared sensor, the heat radiation due to the heating coil heat generation can be suppressed, and the influence of the heat radiation of the heating coil received by the infrared sensor can be reduced. Can do.

  In addition, since the shield is attached so as to cover a part of the heating coil located outside the infrared sensor in the present invention, the heating coil is not visually recognized from the non-hidden part of the top plate, and the user feels uneasy. Does not give any discomfort.

It is a perspective view of the electromagnetic induction heating cooking appliance which concerns on this Embodiment. It is a perspective view of the electromagnetic induction heating cooking appliance of the state which removed the top plate concerning this embodiment. It is a top view of the electromagnetic induction heating cooking appliance which concerns on this Embodiment. It is a perspective view of the state where the main components inside the main part of the electromagnetic induction heating cooking appliance concerning this embodiment were removed. It is a perspective view which shows the air path unit, infrared sensor unit, heating coil holding member, heating coil, and shielding body which concern on this Embodiment. It is a perspective view of the state which decomposed | disassembled the infrared sensor unit which concerns on this Embodiment. (A) It is a perspective view of the state which attached the infrared sensor unit which concerns on this Embodiment to the heating coil unit. (B) It is a ZZ line partial sectional view of Drawing 7 (a). It is a fragmentary sectional view from the top plate which concerns on this Embodiment to a heating coil unit.

Embodiment FIG. 1 to FIG. 3 are diagrams showing an electromagnetic induction heating cooker 1 according to the present embodiment, FIG. 1 is a perspective view of the electromagnetic induction heating cooker according to the present embodiment, and FIG. The perspective view of the electromagnetic induction heating cooking appliance of the state which removed the top plate which concerns on embodiment, FIG. 3 is a top view of the electromagnetic induction heating cooking appliance which concerns on this Embodiment. In the drawings, the same parts are denoted by the same reference numerals.
As shown in FIG. 1, the electromagnetic induction heating cooker 1 according to the present embodiment is configured such that a top plate portion B is provided on a main body portion A in which various components are housed in a substantially rectangular main body case 2. Has been.

In FIG. 1, the top plate portion B includes an upper frame 20 and a top plate 21 attached to the opening of the upper frame 20.
The upper frame 20 is formed in a frame shape from a metal plate such as a nonmagnetic stainless steel plate or an aluminum plate, and has a size so as to close the upper surface opening of the main body case 2. The upper frame 20 is fixed to the main body case 2 with a fixing tool such as a screw. Here, the upper frame 20 is not in the shape of a frame, and may have a configuration in which frames are provided before and after both sides of the frame, and the configuration of the upper frame 20 can be appropriately selected.

  The top plate 21 is placed so as to cover a large opening provided in the center of the upper frame 20. The top plate 21 is entirely made of a translucent material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass, and a light-shielding coating or non-concealing portion (window portion) 3LW, except for a part of 3RW. It is printed and concealed so that the internal structure cannot be seen, and the shape is formed in a rectangle or the like according to the shape of the opening of the upper frame 20. In addition, although the shape of the non-hiding part (window part) 3LW and 3RW is represented by the rectangle in FIG. 1, it is not specified to a rectangle and square, a round shape, etc. can be selected suitably.

Further, the upper frame 20 includes a right ventilation port 20R, a central ventilation port 20C, and a left ventilation port 20L that are simultaneously punched by a press machine when the upper frame 20 is formed. Although details will be described later, the right ventilation port 20R, the central ventilation port 20C, and the left ventilation port 20L serve as an intake port or an exhaust port of the main body A.
On the right ventilation port 20R, the central ventilation port 20C, and the left ventilation port 20L, a metal flat plate-like cover 27 in which countless small communication ports are formed so as to cover the entire upper part is detachably mounted. ing. The cover 27 may be a metal mesh or a fine lattice shape, in addition to a metal plate formed with small holes for communication openings by pressing (also called punching metal). In any case, it is only necessary that the user's finger or a foreign object does not enter the right vent 20R, the central vent 20C, and the left vent 20L from above.

  On the top surface of the top plate 21, circular guide marks 3LM, 3RM, and 5M indicating the approximate positions of the left heating port, the right heating port, and the central heating port are displayed by a painting or printing method, respectively.

  An integrated liquid crystal display unit 16 is provided on the front side in the front-rear direction at the center in the left-right direction on the top plate 21, and liquid crystal display screens 15L and 15R are provided on the left and right. The integrated liquid crystal display unit 16 can input and check the energization states (heating power, time, etc.) of the left and right heating ports, the central heating port, and a heater of the grill heating chamber 7 described later. On the liquid crystal display screens 15L and 15R, the elapsed time from the start of the timer count when the left and right heating ports are cooked by the timer is measured and displayed in numbers. Various electric / electronic components and light emitting elements (LEDs) constituting the liquid crystal display screens 15L and 15R are housed in a front part case (not shown).

On the front surface of the main body case 2, there are provided a door 9 that can be pulled out and a front operation unit 12 provided on both the left and right sides of the door 9.
A window plate made of heat-resistant glass is installed in the central opening 9A of the door 9 so that the inside of the grill heating chamber 7 described later can be visually recognized. The door 9 is opened and closed by pulling out or pushing the handle 9B protruding forward.
The front operation unit 12 sets the main power switch 13 that turns on / off all the power sources of the heating sources for heating each heating port and the grill heating chamber 7 at the same time, and energization of the left heating port and its energization amount (thermal power) And a right operation dial 14R for setting the energization of the right heating port and the energization amount (thermal power).

  In FIG. 2, the inside of the main body case 2 is roughly divided into a left cooling chamber 6L, a right cooling chamber 6R, a box-shaped grill heating chamber 7, an upper component chamber 8, and a rear exhaust at the rear center. A chamber 10 is defined. These rooms are not completely isolated from each other. For example, the left cooling chamber 6L, the right cooling chamber 6R, the upper part chamber 8, and the rear exhaust chamber 10 communicate with each other.

The front opening of the grill heating chamber 7 is covered by a door 9 so as to be freely opened and closed, and the door 9 is held by a support mechanism of the grill heating chamber 7 so as to be movable in the front-rear direction.
An exhaust duct 11 is provided between the left and right rear exhaust chambers 10. The exhaust duct 11 is connected to an exhaust port (not shown) provided at the rear of the grill heating chamber 7, and discharges air with hot air or odor inside the grill heating chamber 7 to the outside.

The upper and lower partition plates 22L are left partition plates that are installed substantially vertically, and serve as partition walls that separate the left cooling chamber 6L and the grill heating chamber 7 from each other. The upper and lower partition plates 22 </ b> R are also right upper and lower partition plates and serve as a partition wall that separates the right cooling chamber 6 </ b> R from the grill heating chamber 7. Note that the upper and lower partition plates 22L and 22R are installed with a distance of several millimeters from the outer wall surface of the grill heating chamber 7.
The upper and lower partition plates 22L and 22R are each formed with a notch 23 so as not to collide with an air passage unit 300 described later when it is horizontally installed.

Further, a horizontal partition plate 24 that partitions the left and right upper and lower partition plates 22L and 22R into two upper and lower spaces is provided. The upper part chamber 8 is above the horizontal partition plate 24. The horizontal partition plate 24 is installed with a predetermined gap of several mm to 1 cm from the ceiling surface of the grill heating chamber 7.
In the present embodiment, the horizontal partition plate 24 is attached horizontally to the inside of the main body case 2, but as long as it divides the main body case 2 vertically at the upper surface position of the grill heating chamber 7, A part or all of the horizontal partition plate 24 may be provided to be inclined with respect to the main body case 2.

  A rear partition plate 25 is provided so as to partition the upper part chamber 8 and the rear exhaust chamber 10. The lower part of the rear partition plate 25 has a height dimension so as to be in contact with the horizontal partition plate 24 and the upper end part thereof in contact with the upper frame 20. Two exhaust holes 26 are formed in the rear partition plate 25, and these exhaust holes 26 are for exhausting the cooling air that has entered the upper part chamber 8 to the rear exhaust chamber 10.

The electromagnetic induction heating cooker according to the present embodiment includes a left heating source 3L, a right heating source 3R, and a radiant central electric heating source 5 (hereinafter referred to as a heating source 5) as heating sources in the upper component chamber 8. I have. Further, a pair of upper and lower radiant electric heating sources (not shown) for the grill heating chamber 7 are provided.
The left heating source 3L is provided on the left side of the main body A, the right heating source 3R is provided on the right side of the main body A, and the heating source 5 is provided on the left and right center lines of the main body A near the rear.

  The constituent members appearing in the appearance described in FIG. 1 correspond to the constituent members in the main body case 2 described in FIG. 2, as shown in the plan view of FIG. That is, the left heating source 3L, the right heating source 3R, and the heating source 5 are respectively disposed in the main body case 2 below the guide marks 3LM, 3RM, and 5M. Further, a lens of an infrared sensor 231 described later is arranged at a position where infrared rays can be detected immediately below the non-hiding portions (window portions) 3LW and 3RW. Further, a rear exhaust chamber 10 and an exhaust duct 11 are disposed below the central vent 20C, and suction ports 32B described later are disposed below the left vent 20L and the right vent 20R, respectively.

  FIG. 4 is a perspective view of the electromagnetic induction heating cooker according to the present embodiment with main components inside the main body removed, and main components are removed from the inside of the main body case 2 shown in FIG. Indicates the state. As shown in FIG. 4, a fan case 32 and a component case 33 are installed in the left cooling chamber 6L and the right cooling chamber 6R, respectively. Each of the left heating source 3L and the right heating source 3R includes a heating coil unit 100 including a heating coil 110, a heating coil holding member 120 that holds the heating coil 110, and a shield 130 that is mounted on the heating coil 110. ing. Below the heating coil unit 100, an infrared sensor unit 200 and an air path unit 300 are provided.

The fan case 32 includes a blower 30 therein. The blower 30 uses a centrifugal multi-blade blower (typically, there is a sirocco fan), and uses a blade having a blade 31 fixed to the tip of the rotating shaft of a drive motor.
The fan case 32 is formed with a blower chamber 32A so as to surround the wing portion 31 of the blower 30, the suction port 32B is formed at the upper end of the blower chamber 32A, and the exhaust port 32C is formed at the lower end. The fan case 32 is formed as an integral structure by combining two plastic cases 32D and 32E, for example, and connecting them with a fixing tool such as a screw.

  The component case 33 contains a circuit board 41 on which an inverter circuit for supplying predetermined high frequency power to the heating coil 110 is mounted. The circuit board 41 is mounted with a driving power source / driving circuit for the driving motor of the blower 30 together with the inverter circuit portion.

The component case 33 has a horizontally long rectangular shape as a whole, and is provided with an introduction port 36 for introducing cooling air discharged from the exhaust port 32 </ b> C of the fan case 32 into the component case 33. The component case 33 is installed in the left cooling chamber 6L and the right cooling chamber 6R so that the exhaust port 32C of the fan case 32 and the introduction port 36 of the component case 33 are in close contact with each other.
In the top view of the component case 33, the first exhaust port 34 is separated from the upstream side of the circuit board 41 and the second exhaust port 35 is separated from the downstream side along the direction in which the cooling air discharged from the fan case 32 flows. It is formed in the position.
The second exhaust port 35 is located on the most downstream side of the flow of the cooling air in the component case 33 and has an opening area larger than that of the first exhaust port 34.

The fan case 32 and the component case 33 configured as described above are inserted and fixed from above into the right cooling chamber 6R and the left cooling chamber 6L in close contact with each other. Then, when the fan case 32 is driven and the blade portion 31 is rotated, air is sucked from the suction port 32B of the fan case 32 and is discharged from the exhaust port 32C as cooling air. The cooling air discharged from the fan case 32 enters the inside of the component case 33 from the inlet 36 of the component case 33, cools the circuit board 41 and is discharged from the second exhaust port 35, and the first exhaust port 34. Are also discharged.
In the present embodiment, the “cooling means” of the present invention corresponds to the fan case 32 and the component case 33 that discharges cooling air from the fan case 32.

  An air path unit is arranged above the component case 33 so as to overlap the first exhaust port 34 and the second exhaust port 35. A heating coil unit 100 to which the infrared sensor unit 200 is attached is disposed above the air path unit 300.

  FIG. 5 is a perspective view showing the air path unit, the infrared sensor unit, the heating coil holding member, the heating coil, and the shield according to the present embodiment. The heating coil unit 100, the infrared sensor unit 200, and the air path unit 300 are shown in FIG. It is a figure which shows a structure.

(Heating coil unit 100)
The heating coil unit 100 includes a heating coil 110, a heating coil holding member 120, and a shield 130.
The heating coil 110 is spirally wound into a bundle of about 30 thin wires of metal of about 0.1 mm, for example, copper, and this bundle (hereinafter referred to as an assembly line) is wound while twisting one or a plurality of wires, and the outer shape is It is finally formed into a disk shape so as to be circular. In the present embodiment, an example of a double heating coil having an inner heating coil 110a in which a collecting wire is formed into a disk shape and an outer heating coil 110b provided concentrically on the outside of the inner heating coil 110a is provided. Explained.

  The heating coil holding member 120 is a member that holds the heating coil 110 and has a substantially circular shape with a slightly larger diameter than the heating coil 110. The heating coil holding member 120 is composed of, for example, a synthetic resin such as PET as a main constituent member. The heating coil holding member 120 has a leg 121 for fixing to the air path unit 300.

The shield 130 is disposed on the heating coil 110 outside the infrared sensor 231 described later, which is incorporated in the infrared sensor unit 200, and suppresses heat dissipation of the heating coil and shields the visual recognition of the heating coil. For example, it is formed of a special acrylic fiber excellent in flame resistance and heat resistance. Felt-like flexible fibers are excellent in processability, and can be easily attached later when fitted and held in a contact temperature sensor 150 described later.
Furthermore, since the heat conductivity and the air permeability are low, it is difficult to convey the influence of the heat generation of the coil to the contact type temperature sensor 150, and the influence of the cooling air from the outlets 303 and 304 provided in the air path unit 300 described later is in contact. It is difficult to exert on the temperature sensor 150. Therefore, the effect that the temperature detection performance of the contact-type temperature sensor 150 can be stabilized by attaching the shield 130 is also obtained. Note that the color of the shield 130 is desirably black because it is less susceptible to the influence of disturbance on the infrared sensor and the visibility of the shield 130 itself is reduced.

(Airway unit 300)
The entire air path unit 300 is molded of plastic and has a step on its upper surface. The high part is referred to as a high part 301 and the low part is referred to as a low part 302. In the present embodiment, the difference in height between the high portion 301 and the low portion 302 is about 10 mm.
The high portion 301 is formed with a plurality of jet ports 303 for jetting cooling air discharged from the component case 33 disposed below. In addition, a wind direction plate 305 is formed at the outlet 303 so as to cover approximately half of the opening. The wind direction plate 305 is provided to control the direction in which the cooling air is blown in order to guide the cooling air blown from the jet outlet 303 toward the rear exhaust chamber 10.
A plurality of jet holes 304 for jetting cooling air discharged from the component case 33 disposed below are formed in the low portion 302. Unlike the jet outlet 303 of the high part 301, the wind direction plate 305 is not provided at the jet outlet 304 of the low part 302.

  In addition, a vent hole 306 having a quadrangular opening is formed at the end of the high portion 301. The ventilation openings 306 are formed so as to be positioned below the liquid crystal display screens 15L and 15R of the top panel B in a state where all the parts are assembled in the main body case 2. Then, the liquid crystal display screens 15L and 15R are cooled by the cooling air blown from the ventilation openings 306.

Inside the air path unit 300, ribs (projections) shaped partition walls 307 and 308 formed in a straight line or a curve by integral molding are formed. By the partition walls 307 and 308, the interior of the air path unit 300 is partitioned into ventilation spaces 311, 312, and 313.
The ventilation space 311 is formed so as to overlap the first exhaust port 34 of the component case 33. Therefore, the cooling air ejected from the first exhaust port 34 is ejected from the ejection port 304 via the ventilation space 311.

  The ventilation space 312 and the ventilation space 313 are partitioned by a partition wall 308. Since a communication port 308A is formed in a part of the partition wall 308, air can flow through each other. The ventilation space 313 is disposed so as to be located above the second exhaust port 35 of the component case 33. Accordingly, the cooling air blown from the second exhaust port 35 is blown from the ventilation port 306 via the ventilation space 313, while being developed in the ventilation space 312 via the communication port 308 </ b> A. Erupted from.

  In addition, on the outer peripheral portion of the air path unit 300, protruding leg holding portions 309 are provided at three locations. The leg holding unit 309 couples the air path unit 300 and the heating coil unit 100 by fixing the leg 121 of the heating coil holding member 120.

(Infrared sensor unit 200)
FIG. 6 is a perspective view of the infrared sensor unit according to the present embodiment in an exploded state.
The infrared sensor unit 200 includes a sheet metal 210, a case 250 including an upper case 220 and a lower case 240, and an infrared sensor device 230 housed in the case 250.

  The sheet metal 210 is a plate-like member made of a member having high heat dissipation such as aluminum, and is provided on the uppermost part of the infrared sensor unit 200 so as to be in close contact with the upper case 220. The sheet metal 210 is a member for obtaining noise resistance and a heat shielding effect. The sheet metal 210 is provided with a sensor hole 211 through which the infrared sensor device 230 takes in infrared rays. Further, insertion holes 212 and 213 for screwing the infrared sensor unit 200 to the heating coil unit 100 are formed.

The infrared sensor device 230 includes an infrared sensor 231 and a substrate 232 on which the infrared sensor 231 is mounted.
The infrared sensor 231 includes a thermopile and a lens, and outputs an infrared detection signal radiated from an object to be heated as a voltage. The substrate 232 includes various electronic components that control the amplifier and the infrared sensor 231, and the voltage output from the infrared sensor 231 is amplified by the amplifier to obtain temperature information of the object to be heated. The temperature information of the object to be heated is output to a control circuit provided on the circuit board 41 and used for heating control and the like.

  The case 250 is a case that houses the infrared sensor device 230, and includes an upper case 220 and a lower case 240. The infrared sensor device 230 is accommodated in the lower case 240 by housing the infrared sensor device 230 and covering the upper case 220.

The upper case 220 is surrounded on all four sides by side walls 221 and opened at the bottom, and a sensor hole 222 is provided on the upper surface thereof. In a state where the infrared sensor device 230 is housed in the case 250, the infrared sensor 231 detects infrared rays through the sensor hole 222.
The lower case 240 is surrounded on all four sides by a side wall 241 and has an upper opening. The infrared sensor device 230 can be placed inside the lower case 240.

  Engaging protrusions 223 are provided on the left and right sides of the lower end of the side wall 221 of the upper case 220. An engaging portion 242 is provided at a position corresponding to the engaging protrusion 223 when the upper case 220 is covered on the outer peripheral portion of the lower case 240. When the upper case 220 is put on the lower case 240, the upper case 220 and the lower case 240 can be coupled by engaging the engaging portion 242 with the engaging protrusion 223.

The upper case 220 and the lower case 240 are formed with insertion holes 224, 225, 243, and 244 through which screws (not shown) for screwing the infrared sensor unit 200 into the heating coil unit 100 are inserted.
Around the insertion holes 224 and 225 of the upper case 220, substantially circular insertion hole ribs 226 and 227 projecting upward are provided, respectively. The insertion hole ribs 226 and 227 have inner diameters larger than the insertion holes 224 and 225 so that when a screw (not shown) for screwing the infrared sensor unit 200 is inserted, a predetermined gap is formed between the insertion hole ribs 226 and 227. It consists of

  The lower case 240 is provided with outer peripheral ribs 245 that protrude in the height direction of the side wall 241 along the outer periphery thereof. When the lower case 240 and the upper case 220 are joined together, the outer peripheral rib 245 comes into contact with and surrounds the joint portion between them. For this reason, when the lower case 240 and the upper case 220 are combined, the joint portion between the two is invisible from the outside.

Fig.7 (a) is a perspective view of the state which attached the infrared sensor unit based on this Embodiment to the heating coil unit, (b) is the ZZ line | wire partial sectional view of Fig.7 (a).
As shown in FIGS. 7A and 7B, the infrared sensor unit 200 uses a screw (not shown) on the back side of the heating coil holding member 120 (the side opposite to the heating coil 110 side). 231 is attached near the outer heating coil 110b between the inner heating coil 110a and the outer heating coil 110b.

  The shield 130 is fitted and held by the contact-type temperature sensor 150 so as to cover the vicinity of the infrared sensor 231 and a part of the outer heating coil 110b.

  The rib 140 is extended toward the top plate at a position between the infrared sensor 231 of the heating coil holding member 120 and the outer heating coil 110b, and the upper end of the rib 140 and the end of the shielding body 130 are arranged. It is arranged to touch.

FIG. 8 is a partial cross-sectional view from the top plate to the heating coil unit according to the present embodiment.
As shown in FIG. 8, the non-hiding part (window part) 3RW (3LW) is provided in the position which comes directly on the top plate 21 of the infrared sensor 231. As shown in FIG.

Next, operation | movement of the electromagnetic induction heating cooking appliance 1 which has said structure is demonstrated.
When the user turns on the power with the main power switch 13 and the heating conditions such as the heating power level and the heating time are set by the left operation dial 14L, these pieces of information are input to the energization control circuit of the circuit board 41, and the heating coil A drive voltage is applied to a drive circuit that drives 110. As a result, a high-frequency current flows through the heating coil 110, and a heated object such as a pan placed on the top plate 21 is heated by the high-frequency magnetic flux from the heating coil 110.

  When a high frequency current flows through the heating coil 110, the heating coil 110 generates heat. When the heating coil 110 is heated, the heat is dissipated to the surroundings, but the shield 130 suppresses heat radiation due to heating coil heat generation on the outer heating coil 110b in the vicinity where the infrared sensor 231 is disposed. The influence of heat radiation of the heating coil that the infrared sensor receives can be reduced. Further, a rib 140 is extended toward the top plate at a position between the infrared sensor 231 of the heating coil holding member 120 and the outer heating coil 110b, and the upper end of the rib 140 and the end of the shield 130 are in contact with each other. Therefore, suppression of heat radiation toward the infrared sensor 231 becomes more reliable.

  Further, as shown in FIG. 8, a non-hiding part (window part) 3RW (3LW) is provided at a position on the top plate 21 immediately above the infrared sensor 231 and the infrared sensor 231 is attached near the outer heating coil 110b. Therefore, although the heating coil unit 100 may be visually recognized by the user through the non-hiding part (window part) 3RW (3LW), the heating coil 110 is shielded by the shield 130 and the rib 140, and the metal assembly line The heating coil 110 is not exposed to the user's line of sight.

  According to the present embodiment as described above, even when the heating coil 110 is heated, the shield 130 and the heating coil holding member 120 disposed on the outer heating coil 110b in the vicinity where the infrared sensor 231 is disposed. Since the rib 140 provided in the direction between the infrared sensor 231 and the outer heating coil 110b toward the top plate suppresses heat radiation due to heating coil heat generation, the influence of the heat radiation of the heating coil received by the infrared sensor is reduced. Therefore, the detection performance of the infrared sensor can be stabilized.

  In addition, the outer heating coil 110b in the vicinity where the infrared sensor 231 is disposed is provided toward the top plate at a position between the shield 130 and the infrared sensor 231 of the heating coil holding member 120 and the outer heating coil 110b. The rib 140 shields the non-hidden part (window part) 3LW and 3RW of the top plate 21 from being visible, so that the user does not visually recognize the presence of the heating coil, and the heating coil that is a metal assembly line is provided. It does not give anxiety or discomfort in terms of safety for use due to visual recognition.

  DESCRIPTION OF SYMBOLS 1 Electromagnetic induction cooking device, 2 Main body case, 3L Left heating source, 3LM guidance mark, 3LW Non-hiding part (window part), 3R Right heating source, 3RM guidance mark, 3RW Non-hiding part (window part), 5 Radiation type Central electric heating source (heating source), 5M guide mark, 6L left cooling chamber, 6R right cooling chamber, 7 grill heating chamber, 8 upper parts chamber, 9 door, 9A central opening, 9B handle, 10 rear exhaust chamber, 11 Exhaust duct, 12 Front operation section, 13 Main power switch, 14L Left operation dial, 14R Right operation dial, 15L LCD display screen, 15R LCD display screen, 16 Integrated LCD display section, 20 Upper frame, 20C Central vent, 20L Left Ventilation port, 20R Right ventilation port, 21 Top plate, 22L Vertical partition plate, 22R Vertical partition plate, 23 Notch, 24 Horizontal partition plate, 25 Rear partition plate, 6 Exhaust hole, 27 Cover, 30 Blower, 31 Wings, 32 Fan case, 32A Blower chamber, 32B Suction port, 32C Exhaust port, 32D, 32E Plastic case, 33 Parts case, 34 First exhaust port, 35 Second Exhaust port, 36 inlet port, 41 circuit board, 42 front part case, 43 electrical component, 100 heating coil unit, 110 heating coil, 110a inner heating coil, 110b outer heating coil, 120 heating coil holding member, 121 leg, 130 Shield, 140 Rib, 150 Contact Temperature Sensor, 200 Infrared Sensor Unit, 210 Sheet Metal, 211 Sensor Hole, 212, 213 Insertion Hole, 220 Upper Case, 221 Side Wall, 222 Sensor Hole, 223 Engagement Projection, 224, 225 Insertion hole, 226, 227 Insertion hole rib, 230 Outside line sensor device, 231 infrared sensor, 232 substrate, 240 lower case, 241 side wall, 242 engaging portion, 243, 244 insertion hole, 245 outer peripheral rib, 250 case, 300 air path unit, 301 high part, 302 low part, 303 Spout, 304 Spout, 305 Ventilation plate, 306 Vent, 307 Partition wall, 308 Partition wall, 308A Vent, 309 Leg holder, 311 Ventilation space, 312 Ventilation space, 313 Ventilation space, A Main body, B Top plate part.

Claims (4)

A box-shaped body case with an open top;
A top plate that covers the upper surface opening of the main body case and on which an object to be heated can be placed;
A heating coil unit disposed below the top plate in the main body case and comprising a concentric multiple coil, and a heating coil holding member for holding the heating coil;
A plurality of temperature detecting means disposed in the heating coil holding member in a substantially concentric manner between the multiple coils of the heating coil and detecting the temperature of the object to be heated placed on the top plate;
Among the plurality of temperature detecting means, at least one is a non-contact type infrared sensor that detects infrared rays radiated from an object to be heated.
The top plate is provided with a light-shielding coating or printing on the back side of the surface on which the object is to be heated, and is provided with a non-hiding part capable of transmitting infrared rays in part, and the infrared sensor is the non-hiding part of the top board. An electromagnetic induction heating cooker characterized in that a shield is attached so as to cover a part of the heating coil located outside the infrared sensor in the vicinity of the non-hiding part.   The electromagnetic induction heating cooker according to claim 1, wherein a rib is provided at a position between the infrared sensor of the heating coil holding member and the heating coil toward the top plate.   2. The shield is held by the contact-type temperature sensor as a contact-type temperature sensor that detects the temperature by contacting the temperature detection means other than the infrared sensor with the top plate. The electromagnetic induction heating cooker described.   4. The electromagnetic induction heating cooker according to claim 1, wherein the shield is made of a flame resistant heat resistant fiber.

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