JP2012023045A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooker having a structure for taking in cooling air and forming cooling air ventilation routes suitable for the cooker built in a cooking table or a sink of a drop-in model.SOLUTION: Inside a body part of the cooker, a plurality of heating parts for cooking are provided, and a circuit board 25 provided with a conduction control circuit for the heating part and a heat dissipation member 27 for the conduction control circuit is disposed below the heating parts laid in a lateral direction. The bottom of the body part is partially formed to protrude upward in a region off the circuit board 25. A suction port having a plurality of through-holes is provided on the protruding portion, and an outlet port is provided on a top face of the body part at the rear. A suction part is formed on the lower side with respect to the suction port, and an exhaust part is formed on the upper side with respect to the suction port. A fan support part housing one axial-flow cooling fan is provided. In the exhaust part, a flow dividing part 40 is formed for dividing a flow of air sucked through the suction port into a first ventilation route 41 supplying the air upward to an undersurface of the heating part, and a second ventilation route 42 supplying the air to the heat dissipation member.

Description

  The present invention relates to a control unit related to energization control for an induction heating coil disposed below a top plate and a heating cooker for cooling the induction heating coil.

  There is a cooking device provided with two induction heating coils 27 and 28 and a central heater 29, and there is a technology for cooling the inverter unit 30 corresponding to the two induction heating coils 27 and 28 by one fan motor. Yes (see Patent Document 1).

  In this patent document 1, four heat radiating members 32 of an inverter unit 30 corresponding to two induction heating coils 27 and 28 are provided on a printed circuit board 31 to cover the four heat radiating members 32 from above. In the state, a cooling duct 35 is arranged. A fan casing 36 is integrally provided at the right rear portion of the cooling duct 35, a cooling fan 37 is disposed in the fan casing 36, and an inlet port 36 b of the fan casing 36 is an inlet port 46 formed at the upper rear portion of the heating cooker. An exhaust port 47 is formed at the rear of the upper surface of the cooking device so as to be connected to the intake port 46.

  In this configuration, the fan motor 38 is energized when one or both of the induction heating coils 27 and 28 are used. When the cooling fan 37 is rotated by the fan motor 38, due to the air blowing action of the cooling fan 37, external air passes through the intake duct 41 from the intake port 46, passes through the intake port cover 40 in the case 26, and the fan. The air is sucked into the casing 36, and the air is discharged from the discharge port 36 a of the fan casing 36 toward the cooling duct 35. The air discharged into the cooling duct 35 flows through the cooling duct 35 while cooling the inverter unit 30, and is discharged into the case 26 from the opening on the left side of the cooling duct 35, and into the rear side and the front side. In other words, the rear side with low ventilation resistance is discharged from the exhaust port 47 to the outside, and the front side is discharged from the front discharge port 52 to the outside of the case 26.

Japanese Patent Laid-Open No. 11-87039

  In such a heating cooker, when the induction heating coils 27 and 28 and the central heater 29 are energized, the surroundings are also hot, so this cooling is also necessary. In Patent Document 1, the inverter unit 30 corresponding to the two induction heating coils 27 and 28 is cooled by one fan motor, but the induction heating coils 27 and 28 and the central heater 29 are cooled. It is not considered how to do it.

  The present invention provides a cooking device such as when the heating unit for cooking is two induction heating coils, or when the heating unit for cooking is a combination of an induction heating coil and a radiant heater. In the case where there are a plurality of heating units, the cooling of the heating unit and the energization control circuit of the induction heating coil are performed by a single cooling fan. This makes it possible to cool the heating part efficiently by making the intake port for taking in the air difficult to be blocked.

  Furthermore, in the present invention, when such a heating cooker adopts a form in which it is incorporated into a kitchen equipment such as a cooking table or a sink by a drop-in method, it is possible to take in cooling air and to form a cooling air passage suitable for it. It provides a possible configuration.

  1st invention equips the upper surface of a main-body part with the top plate, and equips the inside of the said main-body part corresponding to the said top plate with the some heating part for cooking containing at least 1 induction heating coil, The said heating A circuit board including a current-carrying control circuit of the unit and a heat dissipation member of the current-carrying control circuit is disposed laterally below the heating unit, and a part of the bottom surface of the main body is convex upward at a position removed from the circuit board In addition, an air inlet having a plurality of through holes is formed in the convex portion, an air outlet is provided at the rear of the upper surface of the main body, and an air inlet is formed below the air inlet corresponding to the air inlet. And a fan support part that houses an axial cooling fan formed on the upper side, and supplies air sucked from the intake port to the lower surface of the heating part above the exhaust part. A first ventilation route and a second ventilation route to be supplied to the heat dissipating member A cooking device to form a diverter for diverting the and.

  A second invention is a storage device according to the first invention, wherein the cooking device is incorporated in a kitchen equipment table such as a cooking table or a sink by a drop-in method, and the intake port is formed in the kitchen equipment table. Being formed at the position facing the room.

  According to the present invention, cooling of a plurality of cooking heating units including induction heating coils and cooling of an energization control circuit can be satisfactorily performed by a single fan. In addition, by providing an intake port with a through hole formed in a part of the bottom wall of the main body that is processed to be convex upward, intake is performed satisfactorily unless all the intake ports are blocked.

It is a perspective view which shows the relationship which incorporates the heating cooker which concerns on this invention in a kitchen equipment stand. It is a perspective view which shows the state which integrated the heating cooker which concerns on this invention in the kitchen equipment stand. It is a perspective view which shows the inside which removed the top plate of the heating cooker which concerns on this invention. It is a disassembled perspective view which shows the relationship between the main-body part of the heating cooker which concerns on this invention, and the cooling unit which removed the circuit board. It is a disassembled perspective view which shows the relationship between the cooling unit which concerns on this invention, and an induction heating coil. It is a side view of the cooling unit which concerns on this invention. It is a top view of the cooling unit which concerns on this invention. It is AA sectional drawing of FIG. It is a perspective view of the base member of the cooling unit which concerns on this invention. 3 is an energization control circuit for an induction heating coil and a radiant heater according to the present invention.

  In the present invention, a top plate is provided on the upper surface of the main body, and a plurality of cooking heating units including at least one induction heating coil are provided inside the main body corresponding to the top plate, and the heating unit A circuit board including a current-carrying control circuit and a heat dissipation member of the current-carrying control circuit is disposed laterally below the heating unit, and includes a suction port on a bottom surface of the main body at a position removed from the circuit board, and the main body An exhaust port is provided at the rear of the upper surface of the unit, and a fan support unit that accommodates a single axial-flow cooling fan by forming an intake unit on the lower side corresponding to the intake port and forming an exhaust unit on the upper side, The exhaust part is formed with a diverting part that divides the air sucked from the air inlet into a first air blowing route that supplies the air to the lower surface of the upper heating part and a second air blowing route that supplies the air to the heat radiating member. It is a cooker.

  The present invention is a case where the heating unit is a plurality of heating units for cooking, for example, when the heating unit is two induction heating coils or when the heating unit is a combination of an induction heating coil and a radiant heater, In the embodiment described below, the case where the heating unit is a combination of an induction heating coil and a radiant heater is described.

  Hereinafter, as an example of the present invention, an embodiment of a heating cooker 1 including one induction heating coil 4 and one radiant heater 5 will be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a state where the cooking device 1 according to the first embodiment of the present invention is attached to the kitchen equipment table 7. The heating cooker 1 is incorporated in a system kitchen or a kitchen equipment table 7 such as a cooking table or a sink by a drop-in method, and a main body 2 having a substantially rectangular case and an upper surface of the main body 2. A heat-resistant glass top plate 3 supported by a top frame 6 attached to the unit is provided, and is installed inside the main body unit 2 in a space below and corresponding to the top plate 3 with a space in front and back. An induction heating coil 4 and a radiant heater 5 are provided as heat sources. The main body 2 forms a substantially rectangular case having an upper surface opening by a side wall 2B attached to the bottom wall 2A so as to surround the bottom wall 2A and surrounding four sides. The top plate 3 made of heat-resistant glass is in a state in which the peripheral portion is supported by a top plate frame 6 attached to the side wall 2B with screws so as to cover the upper surface opening of the main body 2.

  On the top plate 3 corresponding to the induction heating coil 4 and the radiant heater 5, circular cooking container placement portions 8 and 9 are displayed by printing or the like in order to clearly indicate the place where the cooking container such as a pan is placed. Has been. In the embodiment, the induction heating coil 4 has a heating value of 200 volts and 1.5 Kw, and the radiant heater 5 has a heating value of 200 volts and 1.2 Kw, but is not limited thereto.

  The illustrated kitchen equipment table 7 is shown in the form of a sink 7, and an insertion hole 11 into which the main body 2 of the sink 10 and the cooking device 1 is dropped is provided on the upper surface plate 7 </ b> A of the kitchen equipment table 7 (the sink 7). Is formed through. Thereby, the lower side of the top plate frame 6 is held in a state of being locked to the upper surface plate 7A at the periphery of the insertion hole 11 by a so-called drop-in method in which the main body 2 is dropped into the insertion hole 11. In this holding state, the heating cooker 1 is fixed to the kitchen equipment table 7 (a sink 7) so that the main body 2 is not detached by a bolt screw or other means.

  Since the lower part of the upper surface plate 7A of the kitchen equipment table 7 (the sink 7) is an article storage space, the front surface of the article storage space 12B below the sink 9 can be opened and closed by the doors 8A and 8B. The front surface of the article storage space 12A on the lower side of the cooking appliance 1 can be opened and closed by an open / close door 8C. As described above, in the cooking device 1 dropped into the insertion hole 11, the bottom wall 2 </ b> A of the main body 2 is exposed above the article storage space 12 </ b> A.

  The heating cooker 1 includes an operation switch unit 13 for performing energization control and heat generation control of the induction heating coil 4 and the radiant heater 5 and an LED display unit 14 corresponding to the operation switch unit 13 at the front of the top frame 6. An operating portion 15 is provided, and an exhaust cover 17 having a large number of exhaust holes 17A for forming an exhaust portion 16 for exhausting air after cooling, which will be described later, is attached to the rear portion of the top frame 6.

  An induction heating coil 4 and a radiant heater 5 are disposed in the main body 2. The radiant heater 5 is mounted in a heat-resistant support frame 5A having an opening on the upper surface, and is supported by a support member 19 of a coil spring on the upper surface of a support base 18 mounted so as to rise from the bottom wall 2A. The support frame 5A is urged upward so as to contact the lower surface of the heat-resistant glass top plate 3.

  As shown in FIG. 4 to FIG. 8, in the present invention, the induction heating coil 4 and the radiant heater 5 energization control circuit 26 and the support 24 of the circuit board 25 including the heat dissipation member 27 of the energization control circuit 26, the induction heating coil 4, the casing portion 22 that supports the cooling fan 23, and the flow dividing portion 40 that divides the air blown from the cooling fan 23 to the induction heating coil 4 side and the heat radiating member 27 side. The cooling unit RU is integrated with the base unit 20, and the base member 20 is fixed to a predetermined position in the main body 2 by attaching the base member 20 to the main body 2 with screws or other attachment means. ing.

  One of attachment means for fixing the cooling unit RU at a predetermined position in the main body 2 is shown in FIGS. In this, the main body 2 has a bottom wall 2A and a side wall 2B made of a metal plate. The bottom wall 2A of the main body 2 and the base member 20 are slid relative to each other in the lateral direction (R direction shown in FIG. 4). The main body side engaging portion 50 and the base member side engaging portion 51 that fit each other, the mounting flange 52 formed on the reinforcing flange at the edge of the base member 20, and the both engaging portions 50 and 51 fit each other. The fixing flange 53 is formed by cutting and raising the bottom wall 2 </ b> A of the main body 2 so that the mounting flange 52 is placed in a state, and by tightening a screw passing through the mounting flange 52 and the fixing 53, The base member 20 is fixed to the bottom wall 2A.

  The induction heating coil 4 is attached to the upper surface of a synthetic resin support frame 4A, and is supported by a plurality of support columns 21 standing from a synthetic resin base member 20 attached to the bottom wall 2A of the main body 2. The structure of this support is supported by a support member 21A of a coil spring on a plurality of support columns 21 erected from the base member 20, and the peripheral flange of the support frame 4A is in contact with the lower surface of the top plate 3 made of heat-resistant glass. It is biased upward.

  The synthetic resin base member 20 has a substantially flat plate shape with reinforcing ribs and the like formed around it. The intake portion 22A is formed on the lower side and the exhaust portion 22B is formed on the upper side. The fan support portion 22 formed in a frame shape so as to support the coil in the storage state, the plurality of pillars 21 erected around the fan support portion 22 so as to support the induction heating coil 4, and the circuit board 25 are substantially horizontal. The circuit board arrangement portion 24 that is horizontally arranged so as to be in a state and the diversion portion 40 that diverts the air blown from the cooling fan 23 to the induction heating coil 4 side and the heat radiation member 27 side are integrally formed. .

  The cooling fan 23 is an axial fan, and has a configuration in which an electric motor 23A is housed in the center of rotation and a propeller that is rotated by the electric motor 23A is formed around the electric motor 23A. The cooling fan 23 is rotatably supported by a vertically open fan casing 23K so that the lower side communicates with the intake portion 22A and the upper side communicates with the exhaust portion 22B. For this reason, in a state where the fan casing 23K is housed in the fan support portion 22, the fan casing 23K is placed in the fan support portion 22 by the upper key portion of the elastic hook piece 22F formed in a part of the fan support portion 22. Keep it held.

  The circuit board 25 includes an energization control circuit 26 for the induction heating coil 4 and the radiant heater 5 and a heat dissipation member 27 for the energization control circuit 26. As shown in FIG. 10, in the energization control circuit 26 related to the induction heating coil 4, the AC 200 V power supply 28 is converted into a predetermined direct current by the rectifying circuit 29 and the smoothing circuit 30, and this direct current is applied to the induction heating coil 4. A resonance capacitor 31 is connected in parallel to the induction heating coil 4 to form a parallel resonance circuit 32, and a switching element 33 is connected to the parallel resonance circuit 32 to generate a resonance current, and these constitute an inverter circuit 34. ing. The switching element 33 is controlled by a control circuit 35 including a microcomputer that operates based on the switch operation of the operation switch unit 13. For this reason, the heat generation state of the induction heating coil 4 is controlled by the switching operation of the switching element 33.

  The energization of the radiant heater 5 is controlled by a control circuit 36 that operates based on the switch operation of the operation switch unit 13. The radiant heater 5 may be energized by applying a direct current converted by the rectifying circuit 29 and the smoothing circuit 30.

  The circuit board 25 has a configuration in which various electronic components (not shown) constituting the energization control circuit 26 of the induction heating coil 4 and the radiant heater 5 are attached and these wirings (not shown) are printed. The circuit board 25 further includes a heat radiating member 27 of the energization control circuit 26. The heat dissipating member 27 is made of aluminum or the like, and is used to dissipate heat of a part that generates particularly large heat in the energization control circuit 26. The heat generating member 27 includes a diode 29A of the rectifier circuit 29, a switching element, and the like. 33 corresponds.

  In order to transmit heat generated by the diode 29A and the switching element 33 of the rectifier circuit 29 to the heat radiating member 27, the diode 29A and the switching element 33 are attached to the upper surface of the circuit board 25. The bottom surface of the heat dissipating member 27 is attached to the top surface of the heat conducting member. As one of the attachments, the diode 29 </ b> A and the switching element 33 are attached to the upper surface of the circuit board 25 by common bolts and nuts.

  The fan support portion 22 is configured to raise the air blown by the cooling fan 23 to the induction heating coil 4 when the air blown by the cooling fan 23 flows into the upper exhaust portion 22B from the lower intake portion 22A. A diversion part 40 that diverts into the air blowing route 41 and a second air blowing route 42 that diverts in the lateral direction so as to flow to the heat radiating member 27 is integrally formed. There is nothing in the diverter 40 with respect to the first air route 41, while a part of the fan support 22 is cooled above the cooling fan 23 so as to form the second air route 42. A flange 22 </ b> P is formed at a position covering a part of the fan 23.

  The heat radiating member 27 is disposed at a position close to the fan support portion 22 so as to be cooled by the air blown from the cooling fan 23 flowing through the second air blowing route 42, and is used for cooling that flows through the second air blowing route 42. A plurality of heat radiation fins 27 </ b> A are formed in parallel on the upper surface of the lower base plate 27 </ b> B so that the air blown from the fan 23 flows substantially along the upper surface of the circuit board 25.

  The bottom wall 2 </ b> A of the main body 2 has an intake port 37 that penetrates the bottom wall 2 </ b> A. The cooling unit RU is attached to the main body 2 in a state where the intake unit 22 </ b> A corresponds to the intake port 37. This is achieved by attaching the base member 20 to the bottom wall 2A of the main body 2 by means such as screwing. Since the air inlet 37 is exposed in the upper part of the article storage space 12A, there is a concern that the intake opening 37 may be blocked by the article stored in the article storage space 12A. As shown, the intake port 37 has a structure in which a large number of holes are formed through a portion where a part of the bottom wall 2A is pressed upward in a convex shape. As a result, as long as all of the intake ports 37 are not blocked, the intake air to the cooling fan 23 is satisfactorily performed.

  In the configuration as described above, the air in the article storage space 12A is sucked up from the intake port 37 by the operation of the cooling fan 23, and as shown in FIG. It collides with 22P, flows into the heat radiating member 27 by the 2nd ventilation route 42, and collides with the lower surface of the induction heating coil 4 by the 1st ventilation route 41 which rises as it is, and one part is the induction heating coil 4 and The induction heating coil 4 is cooled through the support frame 4A. The air that has cooled the induction heating coil 4 flows in the lateral direction along the lower surface of the top plate 3 to cool the radiant heater 5, and then the exhaust hole formed in the back wall 2B that is a part of the side wall 2B of the main body 2 38 flows from the exhaust wall 39 to the back side of the back wall 2B and is discharged from the exhaust duct 39 formed on the back side of the back wall 2B through the exhaust hole 17A of the exhaust part 16.

  On the other hand, the air that has flowed to the heat radiating member 27 by the second air blowing route 42 flows in the lateral direction along the upper surface of the circuit board 25 while cooling the heat radiating member 27, and then at a part of the side wall 2 </ b> B of the main body 2. The air flows from the exhaust hole 38 formed in a certain back wall 2B to the back side of the back wall 2B, and is discharged from the exhaust duct 39 formed on the back side of the back wall 2B through the exhaust hole 17A of the exhaust part 16.

  In the embodiment, the proportion of the air blown from the cooling fan 23 by the diverting unit 40 is configured such that the first blower route 41 is configured by two-thirds and the second blower route 42 is configured by one-third. Although the induction heating coil 4 and the radiant heater 5 are cooled, and the diode 29A and the switching element 33 of the energization control circuit 26 can be lowered to a temperature at which they are not thermally destroyed, a good cooling effect is obtained. However, the present invention is not limited to this.

  In this manner, the cooling of the plurality of cooking heating parts including the induction heating coil 4 and the cooling of the energization control circuit 26 can be performed satisfactorily by the single fan 23. Further, since the heat dissipation member 27 performs the heat dissipation of the energization control circuit 26 and the heat dissipation of the rectifier circuit 29 that converts alternating current into direct current, the cooling is performed by the single fan 23 including the induction heating coil 4. It can be performed well simultaneously with the cooling of the heating part for cooking.

  Further, the energization control circuit 26 of the induction heating coil 4 and the radiant heater 5 and the support portion 24 of the circuit board 25 including the heat dissipation member 27 of the energization control circuit 26, the support portion 21 of the induction heating coil 4, and the cooling fan 23 are provided. Since the casing part 22 to be supported and the diversion part 40 for diverting the air blown from the cooling fan 23 to the induction heating coil 4 side and the heat radiating member 27 side are unit RU integrated with the base member 20, The operation of incorporating each component into a predetermined position in the main body 2 of the heating cooker 1 is also simplified, and the ventilation route by the single fan 23 can be easily determined.

  The heating cooker according to the present invention is not limited to the configuration shown in the above-described embodiment, but can be applied to various forms, and includes various forms within the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Cooking device 2 ... Main part 2A ... Bottom wall of main part 3 ... Top plate 4 ... Induction heating coil 5 ... Radiant heater 6 ... Top frame 7 ... Kitchen equipment stand (sink)
7A ··· Top plate 8, 9 ··· Cooking container placement portion 10 ··· Sink 11 ··· Insertion hole 12A, 12B ··· Article storage space 13 ··· Operation switch portion 16 ··· Exhaust part 17 ··· Exhaust cover 19 ··· Coil spring support member 20 ··· Base member 21 ··· Post 21 · · · Coil spring support member 22 · · · Fan Support part 22A ... Intake part 22B ... Exhaust part 22P ... Saddle part 23 ... Axial cooling fan 24 ... Circuit board placement part 25 ... Circuit board 26 ... Energization control circuit 27 ... Heat dissipation member 28 ... AC200V power supply 29 ... Rectifier circuit 30 ... Smoothing circuit 31 ... Resonance capacitor 32 ... Parallel resonance circuit 33 ...・ Switching element 34 ・ ・ ・ ・ Inverter circuit 3 5 ... Control circuit 36 ... Control circuit 37 ... Air inlet 38 ... Exhaust hole 39 ... Exhaust duct 40 ... Branch part 41 ... First air blower Route 42 ... ・ Second air blowing route

Claims (2)

A top plate is provided on an upper surface of the main body, and a plurality of cooking heating parts including at least one induction heating coil are provided in the main body corresponding to the top board, and an energization control circuit for the heating part And a circuit board provided with a heat dissipation member for the energization control circuit is disposed laterally below the heating unit, and a part of the bottom surface of the main body is formed in a convex shape upward from the circuit board. An intake port having a plurality of through holes in a portion formed in a shape, an exhaust port at the rear of the upper surface of the main body, an intake unit is formed on the lower side corresponding to the intake port, and an exhaust unit on the upper side And a fan support part that houses one axial flow cooling fan, and the exhaust part includes a first air supply route that supplies air sucked from the intake port to the lower surface of the heating part above And divert to the second air supply route to be supplied to the heat radiating member Cooker, characterized in that the formation of the diverter.   The heating cooker is configured to be incorporated into a kitchen equipment table such as a cooking table or a sink by a drop-in method, and the intake port is formed at a position facing a storage room formed on the kitchen equipment table. The cooking device according to claim 1, wherein the cooking device is a cooking device.

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