JP2019050211A - Heating cooker - Google Patents

Abstract

To provide a heating cooker which can be prevented from deteriorating in durability as a liquid enters from a connection part when a frame supporting a top plate is divided.SOLUTION: A heating cooker has a housing, an induction heating coil provided in the housing, and a top plate part mounted on the housing and composed of a top plate covering the induction heating coil from above and a frame supporting the top plate, and also comprises an exhaust port formed at a rear end side of the frame to swell upward, and discharging air in the housing to the outside, the top plate being formed to a size large enough to cover an opening on an upper side of a coil chamber accommodating the induction heating coil.SELECTED DRAWING: Figure 19

Description

  The present invention relates to a heating cooker.

  There are known induction heating cookers that operate only with electric power without using gas or fire. In the induction heating cooker, the magnetic flux generated by the induction heating coil acts on the metal cooking pot and the cooking pot itself generates heat. In the induction heating cooker, relatively large input power is required to obtain the heating power necessary for cooking. When the heat loss is large, the induction heating coil, a semiconductor element for driving, for example, an IGBT (Insulated Gate Bipolar Transistor) generates heat, so cooling is required.

  The conventional induction heating cooker is provided with a glass top plate (also referred to as a top plate) covering the cooking surface. The top plate is supported by a metal frame. For example, in patent document 1, fixing a top plate to a flame | frame with a double-sided tape is described. In the configuration described in Patent Document 1, the end of the frame appears on the top plate, and a step is generated on the top plate. Also in Patent Document 2, a step is generated because the top plate is sandwiched between the under frame and the top frame. Since the step is an obstacle in the cooking operation, it is preferable to have no step.

  In the heating cooker described in Patent Document 3, the frame is divided into a front frame, a rear frame, and a side frame. Also in Patent Document 3, a step is generated between the rear frame and the top plate. A groove is formed in the rear frame, and an exhaust port, an intake port and the like are formed in the groove. As described in Patent Document 2, the reason for dividing the frame is to make it easy to manufacture a metal frame by molding.

JP, 2008-171703, A Patent No. 5036731 JP, 2009-245722, A

  Although there is no description about the connection of a front frame, a back frame, and a side frame in the heating cooker of patent document 3, these are usually connected by welding. However, there is a problem that the liquid generated by boiling out during cooking enters from the gap of the connection portion, and the connection between the frames is deteriorated.

  Therefore, an object of the present invention is to provide a heating cooker capable of preventing the deterioration of durability due to the infiltration of liquid from the connection portion when the frame supporting the top plate is divided.

  In order to solve the problems described above, the present invention provides a case, an induction heating coil provided in the case, and a top plate mounted on the case and supporting the top of the induction heating coil and a frame supporting the top plate And an exhaust port formed at the rear end side of the frame so as to rise upward and exhausting the air in the housing to the outside, and the top plate is a coil for housing an induction heating coil. A cooker sized to cover the upper opening of the chamber.

  ADVANTAGE OF THE INVENTION According to this invention, when the flame | frame which supports a top plate is divided | segmented, it can prevent that durability degrades by liquid infiltrating from a connection part. In addition, the effect described here is not necessarily limited, and may be any effect described in the specification.

FIG. 1 is an external perspective view of a heating cooker according to an embodiment of the present invention. Drawing 2 is an appearance perspective view showing the state where the door of a cooking-by-heating machine was opened. FIG. 3 is a bottom perspective view of the heating cooker. FIG. 4A is a diagram showing the state of the speaker, and FIG. 4B is a diagram showing the configuration of the speaker installation unit. FIG. 5 is an external perspective view showing a state in which the upper surface portion of the housing is removed. FIG. 6 is a perspective view showing the state of the coil chamber and the substrate chamber in the housing. FIG. 7 is a perspective view showing the configuration in the coil chamber. FIG. 8 is a perspective view showing the configuration in the coil chamber. FIG. 9 is an exploded perspective view of the heating cooker showing the configuration of the heating chamber. FIG. 10 is an exploded perspective view of the heating cooker showing the configuration of the heating chamber. FIG. 11 is a plan view showing the configuration of the heater provided in the heating chamber. 12A is a cross-sectional view of the door, and FIG. 12B is a perspective view showing the inside of the door. FIG. 13A is a view showing a lock mechanism provided on the door, and FIG. 13B is a view showing the lock mechanism provided on the housing side. FIG. 14 is a diagram showing the flow of air in the housing. 15A is a top perspective view showing the configuration of the heat radiating portion and the inverter, FIG. 15B is a front perspective view showing the configuration of the heat radiating portion and the inverter, and FIG. 15C is a lower perspective view showing the configuration of the heat radiating portion and the inverter FIG. FIG. 16 is a plan view showing the configuration on the substrate. FIG. 17 is a diagram showing the configuration of the upper corner of the housing. FIG. 18 is a plan view of the housing in the state where the upper surface portion is removed. FIG. 19 is a perspective view showing the frame portion of the housing, the upper surface portion, and the side surface of the top plate.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples. The description will be made in the following order.
<1. Embodiment>
<2. Modified example>

<1. Embodiment>
The heating cooker 1 according to the present invention will be described below with reference to the drawings. The heating cooker 1 which concerns on this invention is equipped with the function to perform cooking by an electromagnetic induction heating coil (it is hereafter called induction heating (IH) cooking). Furthermore, the heating cooker 1 also has a function of performing cooking (hereinafter, referred to as grill cooking) in which the material to be cooked is heated by the heat of the heater.

  The heating cooker 1 is composed of a substantially box-like housing 10 and a top plate 2 provided on the housing 10. The housing 10 is configured in a substantially box shape from the front surface portion 12, the side surface portion 13, the bottom surface portion 14 and the back surface portion 15. The housing 10 is made of a metal plate, for example, an iron plate. The top plate portion 2 is composed of a frame portion 16 and a top plate 20.

  In the housing 10, a coil chamber 100 provided with an induction heating coil 120, a heating chamber 200 for heating a material to be cooked by a heater, a substrate 310 provided with a control circuit for controlling the operation of the heating cooker 1, etc. A substrate chamber 300 is provided to accommodate the Details of the coil chamber 100, the heating chamber 200, and the substrate chamber 300 will be described later.

  The top plate 20 is for placing a heating cooker such as a pan and a frying pan, and is made of a material that is not heated by electromagnetic induction, such as high heat resistant glass. An operation panel 21 configured of a touch panel is provided on the top plate 20. The operation panel 21 is configured of, for example, a capacitive touch panel. However, the operation panel 21 is not limited to the electrostatic capacitance type, and may be a touch panel of another type, for example, a resistance wound film type, or may be configured by a physical button. By operating the operation panel 21, the user can perform on / off of the induction heating coil, on / off of the grill heater, thermal power / temperature control, switching of the automatic cooking menu, adjustment of baking, and the like.

  On the top plate 20, a placement range portion 22 which is a substantially circular mark indicating the position of an induction heating coil as an IH heater is provided. In the present embodiment, two induction heating coils 120 are provided. When the user performs IH heating and cooking, the user places a cooking utensil such as a pan and a frying pan containing a material to be cooked on the placement range portion 22.

  One side of the front surface portion 12 is configured as a door 500 for opening and closing the heating chamber 200. The door is provided with a window 501 made of glass or the like. The user can check the inside of the heating chamber 200 from the window 501 during grill cooking.

  Below the door 500, there is provided a handle 510 which can be grasped by the user when the door 500 is opened. The handle portion 510 has a width substantially equal to the width of the door 500, and is formed in the shape of a long projection projecting forward. As shown in FIG. 2, the user can open the heating chamber 200 by pulling the door 500. In order to close the door 500, the door 500 may be pushed toward the heating chamber 200. The door 500 is integrally connected to a receptacle 270 described later.

  The other side of the front surface portion 12 next to the door 500 is configured as a front panel portion 50. The front panel unit 50 is provided with a power switch 51 for switching on and off the power of the heating cooker 1. The power switch 51 may be provided in the operation panel 21. Further, a flange 52 is provided below the front panel 50. The flange portion 52 has a width substantially equal to the width of the front panel portion 50 and, like the handle portion 510 of the door 500, is formed in a projecting shape projecting forward. The handle portion 510 and the hook portion 52 of the door 500 are configured such that the top surface, the front surface, and the bottom surface are flush with each other when the door 500 is closed.

  An exhaust port cover 30 is provided at the upper rear end of the heating cooker 1. The exhaust port cover 30 is provided with a large number of horizontally long narrow holes and covers the exhaust port 17 without blocking the exhaust from the exhaust port 17. The exhaust port cover 30 may be configured as a removable cover.

  FIG. 3 is a perspective view showing the bottom side of the heating cooker 1. As shown in FIG. 3, legs 19 are provided at four corners of the bottom of the housing 10. By providing the legs 19 on the bottom surface of the housing 10, a slight gap is formed between the bottom surface of the housing 10 and the surface on which the heating cooker 1 is mounted, such as a stove stand. Become.

  In addition, as shown in FIG. 3, the lower surface of the collar portion 52 is provided with a first air supply port 61 formed of a plurality of holes. In addition, a second air supply port 62 formed of a plurality of elongated holes is provided in a substantially L shape from the side surface to the lower surface of the front panel portion 50. Furthermore, the bottom surface portion 14 of the housing 10 is provided with a third air supply port 63 formed of a large number of holes. The first air supply port 61, the second air supply port 62, and the third air supply port 63 are for supplying the outside air into the substrate chamber 300. By providing three air supply ports such as the first air supply port 61, the second air supply port 62, and the third air supply port 63, the amount of air supplied to the substrate chamber 300 can be increased.

  The legs 19 are provided on the bottom surface of the housing 10, and a gap is formed between the bottom surface of the housing 10 and the mounting surface, so that air is also supplied into the substrate chamber 300 from the third air inlet 63. can do. Also in this case, the amount of air supplied into the substrate chamber 300 can be increased.

  The first air supply port 61 is formed in a tapered shape that spreads from the outside to the inside of the housing 10. Similarly, the second air supply port 62 and the third air supply port 63 are also formed in a tapered shape that spreads from the outside direction of the housing 10 toward the inside direction. With this configuration, it is possible to suppress wind noise when the air passes through the air supply port by the drive of the cooling fan 330.

  As shown in FIG. 4A, a speaker 71 is provided inside the front panel portion 50. As shown in FIG. 4B, the speaker 71 is provided inside the front panel portion 50, and is inserted into a substantially cylindrical speaker installation portion 72 extending in the projecting direction of the collar portion 52, and fixed at the upper and lower sides, respectively. Provided by The speaker 71 is connected to the control circuit and is for outputting a predetermined guide sound following the control of the control circuit. As the guide voice, for example, there are notification of power on / off, notification of operation content during cooking, notification of set temperature, and the like. The volume of the guide sound may be adjustable by an input to the operation panel 21.

  The speaker 71 is provided so as to output sound in the lateral direction (the direction in which the collar 52 protrudes) in the collar 52 provided in the front panel 50. The sound from the speaker 71 is output to the outside of the housing 10 through the sound output hole 64 provided on the lower surface of the collar 52. By providing the speaker 71 so as to output the sound not in the direction of the sound output hole 64 provided on the lower surface of the collar 52 but in the lateral direction (the direction in which the collar 52 protrudes), the sound is After resonating inside the buttocks 52, it comes out of the sound output hole 64. As a result, the sound from the speaker 71 can be output as a larger and clearer sound.

  Further, by providing the speaker 71 in the collar portion 52, the collar portion 52 becomes a cover, and water, oil and the like can be prevented from being applied to the speaker 71. The arrangement of such a speaker 71 is not limited to the heating cooker 1 according to the present embodiment, and may be applied to household appliances such as a refrigerator, a microwave, a dishwasher, and a dish dryer. Furthermore, the present invention is not limited to household appliances in the home, and can be applied to in-vehicle speakers and the like.

  FIG. 5 is a view showing the heating cooker 1 with the top plate 20 removed. A frame portion 16 formed in a square shape is provided across the upper end of the front surface portion 12, the side surface portion 13, and the back surface portion 15 of the housing 10. The frame portion 16 is fixed by screwing, for example. Further, as shown in FIG. 6, the rear end side of the frame portion 16 is formed wider than the other sides, and the exhaust port 17 is formed at the rear end side. Further, as described above, the exhaust port cover 30 is provided on the exhaust port 17. The exhaust port 17 is configured to slightly rise upward at the rear end side of the frame portion 16. Thus, water and the like can be prevented from entering the exhaust port 17 from the side.

  At an upper portion in the housing 10, a coil chamber 100 for housing an induction heating coil 120a and an induction heating coil 120b for performing IH heating and cooking is formed. The bottom surface in the coil chamber 100 is configured as a coil mounting portion 110 for mounting the induction heating coil 120 a and the induction heating coil 120 b. The coil mounting portion 110 is configured in a substantially flat shape. In the present embodiment, two induction heating coils 120 a and 120 b are provided on the coil mounting portion 110. However, the number of induction heating coils is not limited to two, and may be one or two or more, for example, three.

  The induction heating coil 120 a is provided on the coil mounting portion 110 in a state of being housed inside the annular coil base 130. The coil base 130 is provided with three outwardly projecting protruding coil supports 131. The coil base 130 is provided on the coil mounting portion 110 in a state in which an elastic body such as a spring is interposed between the bottom surface of the coil support portion 131 and the upper surface of the coil mounting portion 110.

  On the coil mounting portion 110, a plate-like coil position restricting portion 140 which stands up is provided. The coil position restricting portion 140 is formed in a U shape opening in the direction of the induction heating coil 120 in a plan view. When each coil support portion 131 is positioned on each elastic body, the outer peripheral side surface of the coil support portion 131 can be in contact with the coil position restricting portion 140. Thereby, the position of induction heating coil 120a is regulated.

  When the induction heating coil 120a is energized, the induction heating coil 120 vibrates, but the coil position control unit 140 can suppress the vibration of the induction heating coil 120a. Therefore, the induction heating coil 120a can be supported in a stable state. The induction heating coil 120b is also provided in the same manner. The number of coil support parts 131 and coil position control parts 140 is merely an example, and the number is not limited to three.

  A communication port 400 is provided at the rear of the coil mounting portion 110 in the housing 10. The communication port 400 is configured to connect the coil chamber 100 and the substrate chamber 300, and the suction force of the cooling fan 330 causes the first air supply port 61, the second air supply port 62, and the third air supply port 63. Then, the air supplied into the substrate chamber 300 ascends and flows into the coil chamber 100.

  As shown in FIG. 7 and FIG. 8, a plate-like air guide portion 150 configured in a substantially L-shape in plan view is provided on the coil mounting portion 110. One end of the air guiding portion 150 is located on the communication port 400 on the rear side of the housing 10, and the end of the one end is in contact with the back surface 15 of the housing 10. Further, the air guide portion 150 is provided such that the other end side is located on the induction heating coil 120 b side, and a certain amount of space is formed between the end portion on the other end side and the side surface portion 13. The width of a certain space between the end on the other end side and the side surface portion 13 is preferably about 10 cm to about 50 cm, preferably about 40 cm. Further, the gap between the upper end of the air guiding portion 150 and the top plate 20 may be approximately 1.5 mm or less. The smaller the gap between the top end of the air guiding portion 150 and the top plate 20, the air can be guided without leakage.

  By arranging the air guiding portion 150 in this manner, the air rising from the communication port 400 can be guided to the induction heating coil 120 a and the induction heating coil 120 b without leakage to efficiently cool the induction heating coil. it can. Furthermore, since the air guiding portion 150 is provided such that a certain amount of space is formed between the end on the other end side and the side surface portion 13, the air flowing around the induction heating coil 120 is reliably exhausted. It can be guided to the mouth 17. As a result, a flow path of air that appropriately cools the induction heating coil 120a and the induction heating coil 120b is formed.

  An operation substrate 40 is provided in front of the coil chamber 100 in the housing 10. The operation board 40 is provided immediately below the operation panel 21. The operation board 40 is connected to a control circuit on the substrate 310 provided in the substrate chamber 300, and a control command is provided to the control circuit provided on the substrate 310 according to an input from the user to the operation panel 21. Output.

  As shown in FIG. 9, a heating chamber 200 is provided below the coil chamber 100. The heating chamber 200 is for performing grill cooking of a foodstuff by the heat of a heater. The heating chamber 200 is configured in a substantially box shape whose front surface is an opening 210. The opening 210 is opened and closed by the door 500. The heating chamber 200 is a space defined by the ceiling wall 201, the bottom wall 202, the left side wall 203, the right side wall 204, and the back wall 205. The ceiling wall 201, the bottom wall 202, the left side wall 203, the right side wall 204, and the back wall 205 are made of metal excellent in light reflectivity such as aluminum-plated steel plate, stainless steel, etc., and function as a reflector reflecting the heat of the heater. May be However, the metal to comprise is not restricted to them, and as long as it is a metal material with good light ray reflectivity, you may use what kind of thing.

  As shown in FIGS. 2, 9 and 10, a tray 270 is provided below the heating chamber 200. The saucer 270 is made of an iron plate or the like that is painted on a roof. On the tray 270, a placement net may be provided for placing the material to be cooked.

  The receptacle 270 has a front end connected to the door 500 and is configured to move back and forth in conjunction with the opening and closing of the door 500. As a result, when the door 500 is pulled out, the pan 270 is pulled out of the heating chamber 200 in conjunction with it, and it becomes easy to place the cooking material on the placement net. Further, when the door 500 is to be closed, the tray 270 is accommodated in the heating chamber 200 in conjunction with it. However, the tray 270 may be separated from the door 500 and configured to be able to be taken in and out from the heating chamber 200.

  An upper heater 230 is provided above the heating chamber 200. Further, a lower heater 240 is provided below the inside of the heating chamber 200. The upper heater 230 and the lower heater 240 are configured by sheathed heaters, for example. However, the upper heater 230 and the lower heater 240 may be configured by a heater other than the sheathed heater, for example, a quartz tube heater.

  A rod-like upper heater support 250 is provided so as to extend between the left side wall 203 and the right side wall 204 at a position substantially the same height as the upper heater 230 in the heating chamber 200. The heater support portion is provided with three laterally elongated holes along the longitudinal direction. The upper heater 230 is supported in a stable state by inserting each of the forks of the upper heater 230 into the hole. The lower heater 240 is also supported by the lower heater support 260 configured similarly to the upper heater support 250.

  As shown in FIGS. 10 and 11, the upper heater 230 and the lower heater 240 are formed in a three-forked shape in which two are formed into a pair by forming three substantially U-shaped curved portions 231. There is. By forming upper heater 230 and lower heater 240 in a forked shape, for example, when grilling a fish, each of the forks is positioned below the three positions of the fish head, belly, and tail. The fish can be heated properly.

  As shown in FIG. 11, the upper heater 230 and the lower heater 240 are any of the left side wall 203, the right side wall 204 and the back wall 205 of the heating chamber 200 and the inner surface of the door 500 which also functions as the front wall of the heating chamber 200. It is comprised so that it may become substantially equidistant. In FIG. 11, a distance L1 to the back wall 205, a distance L2 to the left side wall 203, a distance L3 to the inner surface of the door 500, and a distance L4 to the right side wall 204 are substantially equal. With such a configuration, uneven heat is eliminated in the heating chamber 200, and the material to be cooked can be uniformly heated.

  A grille duct 220 is connected to the back wall 205 of the heating chamber 200. The grille duct 220 is formed in a substantially L-shape in side view, one end side is opened in the heating chamber 200, and the other end side is opened to the exhaust port 17 side. Air in the heating chamber 200 is exhausted from the exhaust port 17 to the outside of the housing 10 through the grille duct 220.

  As shown in FIGS. 12A and 12B, a packing 520 is provided in the inside of the door 500 so as to abut on the glass plate 502 which constitutes the window portion 501. The packing 520 is configured using, for example, an elastic body such as silicon. In the present embodiment, as shown in FIG. 12A, the packing 520 is formed in a substantially T shape in a side view, the flat side is in contact with the glass plate 502, and the protrusion side is provided in the opposite direction to the glass. It is provided to face the resin plate 503 made of plastic or the like.

  Further, as shown in FIG. 12B, the packing 520 is formed in a substantially U-shape opening downward in a plan view, so as to surround the upper side and the left and right sides of the window portion 501 of the door 500. It is provided. By providing the packing 520 between the glass plate 502 and the resin plate 503, a gap 504 is formed between the glass plate 502 and the resin plate 503. By the gap 504 functioning as a heat insulating layer, the heat in the heating chamber 200 is shut off, and the surface of the door 500 can be prevented from becoming hot.

  Further, as shown in FIG. 13A, an engagement protrusion 530 that constitutes a door lock mechanism is provided below both sides of the door 500. The engagement protrusion 530 is configured to have a front sliding surface 531 and a rear sliding surface 532 which are formed obliquely from substantially the center toward the front and the rear. And, at one end side, it is fixed to the side surface of the door 500. Since the other end side is not fixed to the side surface of the door 500 and a slight gap is formed, the engagement protrusion 530 is pressed with the fixed one end side as an axis. And is configured to retract into the door 500. The engagement protrusion 530 may be configured to be retracted inside the door 500 according to the pressure by being provided on the side surface of the door 500 via an elastic body such as a spring.

  On the other hand, as shown in FIG. 13B, the side surface of the front panel portion 50 is provided with a recess-like engagement receiving portion 540 which constitutes a door lock mechanism. A similar engagement receiving portion 540 is provided on the side surface of the housing 10. That is, the engagement receiving portions 540 are respectively present on the left and right of the door 500. When the engagement protrusion 530 provided on the door 500 enters and engages with the engagement receiving portion 540, the door 500 is locked in a closed state. Thereby, the adhesiveness of the door 500 and the housing | casing 10 can be improved, and it can prevent that the hot air in the heating chamber 200 leaks from the clearance gap between the door 500 and the housing | casing 10. FIG.

  When attempting to close the open door 500, the rear sliding surface 532 of the engagement projection 530 contacts and slides on the housing 10, and is further pressed by the housing 10, and the engagement projection 530 enters the inside of the door 500. It will be withdrawn. Then, when the engagement protrusion 530 gets into the engagement receiving portion 540, the engagement protrusion 530 returns to the original state. In this manner, the engagement projection 530 is hooked on the engagement receiving portion 540, and the door 500 is locked in a closed state.

  In the heating cooker 1 according to the present invention, as shown in FIG. 11, the width direction of the heating chamber 200 is larger than the depth direction. Accordingly, it is necessary to increase the dimension in the width direction of the door 500 in accordance with the dimension in the width direction of the heating chamber 200. In order to ensure locking of the door 500 having a large width, door lock mechanisms are provided on both side surfaces in the longitudinal direction of the door 500.

  On the other hand, when attempting to open the closed door 500, the front sliding surface 531 of the engagement protrusion 530 contacts and slides on the side surface of the engagement receiving portion 540, and is further pressed by the housing 10 and engaged The protrusion 530 will be retracted into the door 500. Then, when the engagement protrusion 530 is separated from the housing 10, the engagement protrusion 530 returns to the original state. Thus, the locked state of the door 500 is released.

  The heating chamber 200 is configured such that the dimension in the width direction (lateral direction) is larger than the dimension in the depth direction (longitudinal direction). By configuring in this manner, for example, a plurality of long materials to be cooked such as fish can be arranged side by side in the lateral direction in the heating chamber 200. This makes it possible to heat many cooking materials at the same time.

  If it is attempted to increase the dimension in the width direction of the heating chamber 200 without changing the width of the entire housing 10, the width on the substrate chamber 300 side becomes relatively narrow, and the air supply port provided on the substrate chamber 300 side The width of the air also narrows, and the amount of air supplied decreases. If the width of the heating chamber 200 is increased without changing the width of the substrate chamber 300, the width of the heating cooker 1 itself will be increased. When the width of the heating cooker 1 is increased, there is a possibility that the problem that the heating cooker 1 can not be mounted on a stove base or the like may be caused.

  Therefore, the amount of air supplied to the inside of the substrate chamber 300 is reduced by providing three air inlets such as the first air inlet 61, the second air inlet 62, and the third air inlet 63 on the substrate chamber 300 side. In addition, the width of the heating chamber 200 can be increased without unnecessarily increasing the width of the housing 10.

  Below the coil mounting portion 110 and next to the heating chamber 200, a substrate chamber 300 for housing a substrate 310 is provided. In the present embodiment, two substrates 310 provided with control circuits are provided in the substrate chamber 300. The two substrates 310 correspond to the two induction heating coils 120 respectively. The induction heating coils 120 are controlled by the control circuit, and the output is adjusted in accordance with the size of the cooker and the amount of cooking material, etc. installed on the top plate surface corresponding to each induction heating coil. The induction heating coil 120 is controlled by the control circuit, and a control command corresponding to the user's input to the operation panel 21 is input to the control circuit. The control circuit controls each part of the heating cooker 1 in accordance with a control command from the operation panel 21.

  As shown in FIG. 9, a cooling fan 330 is provided in front of the substrate chamber 300. In the present embodiment, an axial fan is used as the cooling fan 330. The fan of the cooling fan 330 has a double configuration, and one side is a fixed vortex. When the cooling fan 330 is operated, the outside air is supplied from the first air supply port 61, the second air supply port 62, and the third air supply port 63 into the substrate chamber 300. The supplied outside air flows in the substrate chamber 300 by the action of the cooling fan 330. Thereby, the substrate 310 can be cooled. The cooling fan 330 may be a fan other than the axial fan, for example, a centrifugal fan.

  The cooling fan 330 is provided in the heating chamber 200 at a certain distance from the front end of the heating chamber 200. That is, the cooling fan 330 is not provided at the front end in the heating chamber 200, but is provided in the heating chamber 200 at a certain distance from the front end in the heating chamber 200. . By providing in this manner, the operation noise of the cooling fan 330 can be suppressed from leaking out of the housing 10.

The first air supply port 61 and the second air supply port 61 are provided by providing the first air supply port 61 on the lower surface of the flange 52 and providing the second air supply port 62 on the lower end of the front panel 50 that is below the flange 52 Water, oil, dirt and the like can be prevented from entering the substrate chamber 300 from the air port 62. Further, since the third air supply port 63 is provided on the lower surface of the housing 10, water, oil, dirt, and the like do not enter the substrate chamber 300 from the third air supply port 63.

  A communication port 400 is provided at the upper rear end of the substrate chamber 300 so as to communicate with the coil chamber 100. The communication port 400 is for the air flowing through the substrate chamber 300 from the first to third air supply ports 63 to rise and flow into the coil chamber 100.

  In order to prevent water, oil, dirt, etc. from entering the substrate chamber 300, the coil chamber 100, the heating chamber 200, and the substrate chamber 300 are configured not to communicate with each other except for the communication port 400. .

  Here, the flow of air in the housing 10 will be described with reference to FIG. First, air is supplied from the first air inlet 61, the second air inlet 62, and the third air inlet 63 to the substrate chamber 300 by the suction force of the cooling fan 330 (arrow A). The supplied air flows to the back of the substrate chamber 300 while cooling the substrate 310 (arrow B). Then, the air rises along the rear wall surface of the substrate chamber 300 (arrow C), passes through the communication port 400, and flows into the coil chamber 100 (arrow D).

  The air which has flowed into the coil chamber 100 passes over the coil mounting portion 110 and cools the two induction heating coils 120a and 120b (arrow E). When the air flows on the coil mounting portion 110, the air is guided by the air guiding portion 150, comes out from the communication port 400, and is guided and flows toward the induction heating coil 120a. Since one end side of the air guiding portion 150 is provided in contact with the back surface portion 15 without a gap, all the air flowing into the coil chamber 100 from the communication port 400 flows to the induction heating coil 120 a without leaking. Next, the air is guided along the air guiding portion 150 in the direction of the induction heating coil 120 b. Since a certain amount of space is formed between the air guiding portion 150 and the side surface portion 13, the air cools the induction heating coil 120 b and then the space from the space between the air guiding portion 150 and the side surface portion 13 10 flows to the rear exhaust port 17 and is finally discharged to the upper outside (arrow F).

  Next, the substrate 310 provided in the substrate chamber 300 will be described. On the substrate 310, a heat radiating portion 340 and a large number of circuit elements constituting a control circuit are provided. The heat dissipation unit 340 includes a plurality of flat fins 341 rising upward. Further, as shown in FIGS. 15A to 15C, on the back surface of the heat sink 340 (the surface opposite to the side on which the fins 341 are provided), positive and negative switching elements (IGBT: Insulated Gate Bipolar Transistor) are provided. Two inverters 350 configured as a pair are provided. In addition, a rectifier 351 is provided on the back surface of the heat dissipation unit 340.

  The inverter 350 is for supplying a high frequency current to the induction heating coil 120, and the inverter 350 is attached to the heat dissipation unit 340 in order to cool the inverter 350 efficiently. The air taken in from the outside by the cooling fan 330 is sent as cooling air into the substrate chamber 300 to cool the heat sink attached with the inverter 350. The inverter 350 and the rectifier 351 are attached to the heat dissipation unit 340 by screwing, for example.

  The heat radiating portion 340 is provided such that the longitudinal direction of the fins 341 is substantially the same as the direction in which the air flows from the cooling fan 330 to the back of the substrate chamber 300 and in the substrate chamber 300. By providing in this manner, the air supplied into the substrate chamber 300 by the cooling fan 330 can smoothly flow between the fins 341 and the fins 341 in the heat radiating portion 340, and the heat radiating portion 340, the inverter 350, and the rectifier 351. Can enhance the cooling effect of

  The inverter 350 is arranged to include more fins 341 within a range substantially equal to the width of the inverter 350. Also by this, the cooling effect by the heat radiating portion 340 can be enhanced. The rectifier 351 is also arranged in the same manner.

  Further, as shown in FIG. 16, among the circuit elements provided on the substrate 310, components that easily generate heat such as a capacitor (hereinafter referred to as a heat generating component 360) It is provided at a position where the passed air does not come in contact (a position other than the extension of the fin 341 of the heat radiating portion 340).

  By providing the heat generating component 360 at such a position, the heat generating component 360 is not cooled by the air warmed by passing through the heat radiation portion 340, and the cooling effect can be enhanced. When the heat generating component 360 is provided at a position on the extension of the longitudinal direction of the fin 341 of the heat radiating portion 340, the air warmed by passing through the heat radiating portion 340 contacts the heat generating component 360, efficiently cooling the heat generating component 360. It can not be done.

  The coil chamber 100, the heating chamber 200, and the substrate chamber 300 provided in the housing 10 are configured as described above.

  As shown in FIG. 17, the corner portion 600 of the rectangularly shaped housing 10 is folded back so as to slightly protrude to the inside of the housing 10. The width of the case 10 projecting inward is approximately 2 mm, for example. However, the protrusion width is not limited to this size. By configuring in this manner, the strength of the housing 10 can be increased.

  Further, as shown in FIG. 18, the bottom portion 14 of the housing 10 is provided with a recess 700. The recess 700 is provided at a position substantially directly below the exhaust port 17 provided at the rear of the housing 10. Further, the recess 700 is provided with a plurality of holes 701. By providing such a recessed portion 700, even if water or the like enters the housing 10 from the exhaust port 17, all the water falls to the recessed portion 700, and the housing 10 is removed from the hole portion 701 of the recessed portion 700. Discharged into As a result, water or the like entering from the exhaust port 17 does not accumulate in the housing 10.

  The top plate 20 is fixed on the frame portion 16 using an adhesive. Thus, unlike the process method such as screwing and fitting, steps and gaps are not formed on the surface of the top plate 20, and the top surface of the top plate 20 can be formed flat. As a result, no dirt is accumulated in the steps or gaps, and the top plate 20 can be easily cleaned.

  The frame part 16 which comprises the top plate part 2 is comprised by joining together the front flame | frame 801 and the back flame | frame 802 which are two substantially U-shaped plate-like members by methods, such as welding. With this configuration, as shown in FIG. 19, a step is formed on the plate-like member and the connection portion 803 of the plate-like member on the side surface of the frame portion 16. The top plate 20 is configured to be capable of covering the connection portion 803. By configuring the top plate 20 to have such a size, the top plate 20 covers the connection portion 803, and it is possible to prevent dirt and the like from being accumulated by the connection portion 803 which is a step. Moreover, when the liquid infiltrates from the connection part 803, it can prevent that durability of the heating cooker 1 degrades. Also, the strength of the frame portion 16 can be increased.

<2. Modified example>
As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to the above-mentioned embodiment, Various deformation | transformation based on the technical idea of this invention are possible. The present invention is also applicable to so-called IH cookers which do not have a heating chamber, for example, have no heating chamber.

1 ························································································································································ top plate 30 ....... exhaust port cover 52 ....... eaves portion 61 ....... first air supply opening 62 ......... second air supply opening 63 ............ third air supply opening 100 ...... coil chamber 120 ...... electromagnetic induction coil 150 ...... air guide 200 ...... heating chamber 230 ...... upper heater 240 ...... lower heater 300 ...... substrate chamber 330 ...... cooling fan 340 ...... radiating portion 350 ... ························································································································································· ...... Connection portion

In order to solve the problems described above, according to the present invention, there is provided a top plate comprising a casing and a top plate mounted on a casing and supporting the top of the induction heating coil and a frame for supporting the top plate; An exhaust port formed on the side so as to rise upward, having an exhaust port for exhausting the air in the housing to the outside, and a large number of horizontally long narrow holes, and covering the exhaust port without blocking the exhaust from the exhaust port The top plate is configured to cover the opening above the coil chamber that houses the induction heating coil, and the exhaust port cover is gently inclined back and forth from the central portion in the short side direction, and the frame rear end It is a heating cooker which has a shape which covers an exhaust port including the rise part of a side .

Claims (7)

And
An induction heating coil provided in the housing;
A top plate mounted on the housing and covering the upper side of the induction heating coil, and a top plate portion including a frame supporting the top plate;
Have
The rear end side of the frame is formed to bulge upward, and is provided with an exhaust port for exhausting the air in the housing to the outside,
The heating cooker, wherein the top plate is sized to cover an opening above a coil chamber that houses the induction heating coil. The heating cooker according to claim 1, further comprising a recess provided with a plurality of holes below the exhaust port. The heating cooker according to claim 2, wherein the recess is configured to be larger than a projected shape of the exhaust port. The heating cooker according to claim 1 or 2, wherein the exhaust port is covered by a removable cover. The heating cooker according to any one of claims 1 to 4, wherein the upper end of the side portion constituting the casing is folded back toward the inside of the frame. The heating cooker according to claim 5, wherein the upper end corner of the side portion is folded back toward the inside of the casing. The heating cooker according to any one of claims 1 to 6, wherein the top plate is fixed on the frame using an adhesive.