JP2015218998A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which takes in only cooling air into a body without being affected by fitting between multiple components.SOLUTION: In a heating cooker, a lower part of a body 1 includes a cover member 6 and a suction port 11 for taking air into the body 1 is provided at the cover member 6. Further, a suction port 25 is provided at a bottom plate 22 of the body 1 so as to face the suction port 11. A peripheral portion of the cover member 6, in which the suction port 11 is provided, and a peripheral portion of the bottom plate 22, in which the suction port 25 is provided, overlap with each other, and a gap which allows hot air to enter from a space between the cover member 6 and the bottom plate 22 into the suction port 11 is not formed near the suction port 11. Thus, the heating cooker takes only cooling air F1 into the body 1 through the suction port 11 without being affected by fitting between the body 1 and the cover member 6.

Description

  The present invention relates to a cooking device that heats an object to be heated in an oven cabinet and sucks air into a main body below the oven cabinet to cool electronic components and the like.

  As a conventional cooking device, for example, in Patent Document 1, an inclined portion that is inclined downward and a flat portion that is continuous with the lower edge of the inclined portion are formed on the bottom wall of the main body, and the lower end of the leg and the bottom of the main body are formed. An idea of providing an intake port in an inclined portion in order to perform intake into the main body from a space between walls is shown.

  Another Patent Document 2 discloses that a radial fan is disposed in the housing chamber in the vicinity of the center of the bottom surface of the housing chamber in order to guide the cold air to the housing chamber for the electronic parts formed below the oven cabinet inside the main body. A cooling structure of a cooking device provided with an air inlet is disclosed.

Japanese Patent No. 3784280 JP 2006-177593 A

  Each of the heating cookers of Patent Documents 1 and 2 described above directly takes air into the storage chamber from an air inlet provided at the bottom of the main body. However, when a cover member separate from the main body is provided in the lower part of the main body and an air inlet is provided in the cover member to take air into the main body, a plurality of leg members that are the main body and leg covers that are the cover members are used. It is necessary to make up the bottom of the product with these parts.

  This will be described with reference to the schematic diagrams of FIGS. 17 and 18. Reference numeral 101 denotes a main body having an oven not shown, and reference numeral 102 denotes a cover member disposed in front of the lower portion of the main body 101. A plurality of legs 103 protrude from the bottom surface of the main body 101 so that the main body 101 functions as a leg. In these drawings, if the leg 103 is also provided on the bottom surface of the cover member 102, the cover member 102 can function as a leg cover. In addition, 104 is a door that can be opened and closed to block the entire opening of the oven cabinet, and 105 is a handle attached to the front surface of the door 104.

  An air inlet 107 for taking air into the main body 101 is formed in the bottom surface of the cover member 102. When viewed from the bottom of the cooking device, the air inlet 107 is formed in a U-shape with a wall opened toward the gap 108 between the main body 101 and the cover member 102. When the cover member 102 is assembled to the main body 101 as a plurality of parts, the gap 108 is formed on the mating surfaces of the parts due to variations in the shapes and dimensions of the parts.

  In the above configuration, when a blower (not shown) such as a fan motor built in the main body 101 is operated, the cooling air F1 indicated by the solid line with an arrow in FIG. It is forcibly taken into the main body 101 from the mouth 107. However, outside the air inlet 107, the air heated inside the main body 101 is sucked into the U-shaped air inlet 107 having a wide opening from the gap 108 as hot air F2 indicated by a broken line with an arrow in FIG. And mixed with the cooling air F1. As described above, when air is sucked from many places at the bottom of the heating cooker, originally unnecessary hot air F2 is also sucked into the air inlet 107, which is disadvantageous for cooling the inside of the main body 101.

  Therefore, in view of the above problems, an object of the present invention is to provide a cooking device capable of taking only cooling air into the main body without being affected by the alignment of a plurality of components.

  The invention according to claim 1 is a heating cooker provided with a main body having an oven for storing an object to be cooked, and has a cover member at the lower portion of the main body, and the first intake port for taking air into the main body A cover member is provided, and a second intake port is provided in the main body so as to face the first intake port.

According to a second aspect of the present invention, the first intake port is surrounded by a wall and the wall is in contact with the grounding surface of the heating cooker, or a separate part is provided on the cover member to connect the heating cooker. It is configured to be in contact with the ground.
It has.

  The invention of claim 3 is characterized in that the first intake port is surrounded by a wall, and a notch for taking in air is provided in the wall.

  The invention of claim 4 is characterized in that the first air inlet is a punched hole or a louver hole.

  According to the first aspect of the present invention, the peripheral portion of the cover member provided with the first air inlet and the peripheral portion of the main body provided with the second air inlet naturally overlap each other, and the cover member and the main body are disposed in the vicinity of the first air inlet. During this time, no gap is formed so that hot air enters the first air inlet. Therefore, only the cooling air can be taken into the main body from the first intake port without being affected by the alignment of the main body and the cover member, which are a plurality of parts.

  According to the invention of claim 2, the wall serves as a guide for the cooling air, and the cooling air is blocked from the hot air so that only the cooling air is efficiently taken into the main body from the first air inlet. Is possible. In addition, the cooking device including the main body and the cover member can be supported on the ground surface using a wall or another component.

  According to the invention of claim 3, the wall serves as a guide for the cooling air, and the cooling air is blocked from the hot air so that only the cooling air is efficiently taken into the main body from the first air inlet. In addition, it is possible to designate the position where the cooling air is taken into the first intake port by the notch.

  According to the fourth aspect of the present invention, the user can prevent the user from accidentally touching the electronic components in the main body from the first air intake port by using the first air intake port as a hole or a louver hole.

It is a perspective view which shows the external appearance roughly as an example at the time of applying the heating cooker of this invention to the microwave oven with an oven function. It is a front view same as the above. It is a top view same as the above. It is a right side view same as the above. It is a bottom view same as the above. It is a principal part perspective view which shows the surroundings of the inlet port of a cover member same as the above. It is a bottom view of the principal part corresponding to FIG. 6 same as the above. It is a perspective view which shows another example of the inlet of a cover member same as the above. FIG. 8 is a cross-sectional view taken along the line AA of FIG. 7 showing the louver hole before and after molding. It is a principal part perspective view of another example which shows the surroundings of the inlet port of a cover member same as the above. It is a detailed bottom view of the microwave oven shown in FIG. It is the principal part enlarged view of FIG. 10 same as the above. It is a detailed longitudinal cross-sectional perspective view of the microwave oven shown in FIG. 1 same as the above. FIG. 2 is a detailed perspective view of the microwave oven shown in FIG. 1 as viewed from the front lower left side with the cover member removed in addition to the main body cabinet and the bottom plate. It is the detailed perspective view which looked at the microwave oven shown in FIG. 1 from the front upper right side same as the above. It is the same detailed perspective view which looked at the microwave oven shown in FIG. 1 from the front left upper side. It is a principal part external view seen from the product bottom part which shows a prior art example. It is the principal part external view seen from the product side part same as the above.

  Hereinafter, preferred embodiments of the cooking device of the present invention will be described with reference to the accompanying drawings.

  1 to 5 schematically show the appearance of a cooking device such as a microwave oven with an oven function. In each of these drawings, an oven 2 as a heating chamber for storing an object to be heated and cooking it is formed inside a main body 1 formed in a rectangular box shape. The oven cabinet 2 basically forms a rectangular box-like cooking chamber, is wide in the left-right direction, and is provided with a door 3 for opening and closing the large front opening. Therefore, the door 3 is provided so as to cover almost the entire front surface of the main body 1, and the lower end portion thereof is pivotally supported so as to be freely rotatable.

  The upper part of the door 3 is provided with a handle 5 for opening and closing which is used when the door 3 is opened and closed, and an operation panel unit (not shown) for display and operation is provided at the lower part of the door 3. I have. A cover member 6 separate from the main body 1 is disposed below the door 3 and in front of the lower portion of the main body 1. Four legs 7 protrude from the four corners of the bottom surface of the main body 1 so that the main body 1 functions as a leg. Thereby, when the cooking device as a product including the main body 1, the door 3, and the cover member 6 is placed on the flat ground surface S, the lower end surface 7 </ b> A of the leg 7 abuts on the ground surface S and heats it. It is configured to support the entire cooker.

  Below the oven cabinet 2, a housing chamber 8 having a size allowing air to flow is formed inside the main body 1, and houses electronic components (not shown) necessary for oven heating and range heating. 8 is configured to be accommodated. A hot air fan unit 9 that generates hot air is provided at the rear of the main body 1 so as to communicate with the rear of the oven cabinet 2. In particular, in the oven heating, the air heated by the hot air fan unit 9 circulates in the entire oven cabinet 2 and cooks the food to be cooked therein.

  An air inlet 11 for taking air into the housing chamber 8 inside the main body 1 is formed at the substantially center of the bottom surface of the cover member 6, and protruding wall-like ribs 12 are disposed so as to surround the air inlet 11. The The rib 12 may be formed integrally with the cover member 6 as the same part. However, as another part, for example, a packing more elastic than the main body 1 or the cover member 6 may be added and attached to the cover member 6. Good. Here, the rib 12 surrounds the entire circumference of the air intake port 11 without a gap, and the air intake port 11 is interposed between the lower end surface 12A of the rib 12 and the ground contact surface S in a state where the leg 7 is in contact with the ground contact surface S. A gap is formed that allows air to be taken in.

  FIG. 6 shows the intake port 11 of the cover member 6 and its peripheral configuration in more detail. Moreover, FIG. 7 is the schematic seen from the bottom face side of the heating cooker corresponding to FIG. The air inlet 11 is formed in a lattice shape in which a plurality of vertically long rectangular holes 11A are arranged along the front-rear direction X of the heating cooker. The hole 11A may not be rectangular, but may be, for example, a circular round hole, or may be an elliptical hole or a long hole in which both ends of the rectangle are R-shaped. Moreover, in this figure, although the shape of the several hole 11A is shown identically, you may be the hole 11A of a different shape.

  When the hole 11A is provided in the cover member 6 made of a metal plate such as an iron plate, any of the holes 11A is a punched hole in which the shape corresponding to the hole 11A is cut out from the metal plate. Therefore, the cover member 6 does not exist in the direction in which the hole 11A is opened. On the other hand, in another example of the air intake port 11 shown in FIG. 8, the wing portion 14 formed integrally with the cover member 6 at a predetermined inclination angle is formed in the opening direction of the hole 11B by making the hole 11B a louver hole. Exists.

  FIG. 9 shows cross sections of the louver hole (hole 11B) shown in FIG. 8 before and after molding. In the same figure, in order to provide a louver hole in the cover member 6 made of a metal plate, the pressing portion P of the cover member 6 is pressed by pressing in a state before molding, and a slit serving as a slit is made here. Then, if the cut portion is pushed down without hollowing out any cover member 6, the hole 11B with the blade portion 14 is completed as a louver hole.

  The wing-shaped blade portion 14 using a part of the cover member 6 has a shape and an inclination angle so that fingers cannot reach the electronic components inside the storage chamber 8 from the hole 11B, and is exposed to the outside of the cover member 6. Provided. On the other hand, the punched holes (holes 11A) that do not have the blade portions 14 shown in FIG. 6 are formed in a shape that prevents fingers from reaching the electronic components inside the storage chamber 8 from the respective holes 11A. Thereby, even if it makes any hole 11A, 11B the inlet port 11, it can prevent that the user of a heating cooker accidentally touches the electronic component etc. in the storage chamber 8 with a finger | toe.

  Returning to FIG. 6 again, the rib 12 here does not surround the entire circumference of the air inlet 11 without a gap, but preferably the air inlet 11 from the front of the heating cooker on the side opposite to the main body 1. In order to be able to take in cold air, a notch 16 partially free of ribs 12 is provided. The cutouts 16 may be provided at least at one location around the intake port 11, but a plurality of cutouts 16 may be provided in the same direction or different directions as viewed from the intake port 11. 6 shows a notch 16 in which one side of the rib 12 formed in a rectangular frame shape as viewed from the bottom is cut, but only a part of one side of the rib 12 is perforated as shown in FIG. It is good also as the notch 16 which cut. When the notch 16 is provided in the rib 12, when the cooking device is placed on the grounding surface S, the lower end surface 12A of the rib 12 is brought into contact with the grounding surface S together with the lower end surface A of the leg 7, and the entire cooking device is heated. It is good also as a structure which supports.

  In the cover member 6 of the present embodiment, the rib 12 is in contact with the grounding surface S of the heating cooker in the same manner as the leg 7 of the main body 1 or another part (not shown) such as packing added to the cover member 6 is provided. Like the leg 7 of the main body 1, it is in contact with the grounding surface S of the heating cooker and functions as a leg cover component that becomes the leg of the heating cooker. In this case, the cooking device including the main body 1 and the cover member 6 can be supported on the ground plane S by using the ribs 12 and other parts. However, the cover member 6 may not be installed on the ground surface S, and may simply function as an external component of the heating cooker, and a water receiver (not shown) that receives water droplets dripping from the heating cooker is also covered by the cover member. By providing the cover member 6, the cover member 6 may function as a water receiving component. Thus, the main body 1 and the separate cover member 6 can add various functions according to the usage pattern of the heating cooker.

  Next, the flow of air inside the heating cooker will be described with reference to FIGS. In each of these drawings, the main body 1 has, as its outer members, a cabinet 21 as a sheet metal part covering the upper surface and the left and right side surfaces of the cooking device, a bottom plate 22 as a sheet metal part covering the lower side of the heating cooker, and cooking And a back plate 23 to which a hot air fan unit 9 including a hot air fan and a hot air heater (not shown) is attached. Moreover, the cover member 6 is attached and fixed to the bottom plate 22 as a resin part to be assembled to the front lower side of the cooking device. Here, the cover member 6 is provided with packings 24 as elastic members, which are separate parts as described above, on both the left and right sides, and the cooking device is supported on the ground surface S by the legs 7 and the packings 24. Yes.

  As described above, the cover member 6 is provided with the intake port 11 for taking air into the housing chamber 8 inside the main body 1, and the intake port 11 here has a plurality of elongated holes 11 </ b> A. Arranged in a staggered pattern. Further, the bottom plate 22 is formed with an air inlet 25 having a round hole 25A that is directly opposed to the holes 11A. The intake port 25 communicates with the storage chamber 8 inside the main body 1, and the air taken into the intake port 11 of the cover member 6 passes through the intake port 25 of the bottom plate 22 and is guided to the storage chamber 8. ing.

  In the present embodiment, as the intake port 11 of the cover member 6 and the intake port 25 of the bottom plate 22 which is the main body 1 are arranged to face each other, the peripheral portion of the cover member 6 where the intake port 11 is provided, and the bottom plate 22. It is noted that the peripheral portion provided with the air inlet 25 overlaps so as to contact without interposing other members. As a result, the hot air generated in the storage chamber 8 with the heat generation of the electronic components mounted in the storage chamber 8 enters through the gap between the cover member 6 and the bottom plate 22 and is taken in from the intake port 11. Can prevent mixing with air. That is, in this embodiment, the cooling air sucked from the intake port 11 of the cover member 6 passes through the intake port 25 of the bottom plate 22 as it is without being mixed with hot air, so that the inside of the main body 1 which is a separate member. It is the structure sent out to the storage chamber 8.

  In FIG. 14, the flow of the air F inside the main body 1 is indicated by a broken line with an arrow. In the figure, reference numeral 31 denotes a plurality of electronic components necessary for cooking the cooking object in the oven cabinet 2. The electronic component 31 is soldered and mounted on a flat circuit board 32, and is disposed inside the housing chamber 8 together with the circuit board 32 as a heat source during energization. The air inlet 25 of the bottom plate 22 described above is located relatively close to the electronic component 31.

  In addition, a blower 33, a duct 34, and the like are disposed inside the storage chamber 8. The blower 33 is constituted by a centrifugal fan motor in which a fan 35 in which a plurality of blades are radially arranged is attached and fixed to a rotating shaft of a motor 36 as a drive source. Here, a circuit board 32 on which various electronic components 31 are mounted. And the inlet 34 </ b> A of the duct 34. Further, the hollow cylindrical duct 34 having a predetermined cross-sectional area has an inlet 34A facing the discharge port of the blower 33 and an outlet port 37 formed on the side surface of the cabinet 21 (FIGS. 15 and 16). See). The exhaust port 37 is configured by arranging a plurality of louver holes 37B in the same manner as the above-described louver hole 11B. In addition, the code | symbol 38 shown in FIGS. 14-16 is the operation panel part for the display and operation provided in the lower part of the door 3. As shown in FIG.

  Next, the effect | action is demonstrated about the said structure. When the switch of the operation panel unit 38 is operated to instruct the start of heating of the object to be cooked accommodated in the oven cabinet 2, microwave energy from a microwave generating means (not shown) or hot air from the hot air fan unit 9 is generated. Then, the food to be cooked is supplied to the oven cabinet 2 at an appropriate timing, and the food to be cooked placed therein is cooked. Along with this cooking, the electronic component 31 mounted on the circuit board 32 is energized to generate heat in the accommodation chamber 8, and the blower 33 is driven by energization of the motor 36 in order to suppress the temperature rise of the electronic component 31. Then, the fan 35 rotates and a flow of air F as shown in FIG. 14 is forcibly formed inside the main body 1.

  At this time, hot air is generated inside the storage chamber 8 as the electronic component 31 generates heat. However, since the intake port 11 of the cover member 6 and the intake port 25 of the bottom plate 22 are arranged to face each other directly, such hot air is generated. Does not go out of the heating cooker through the gap between the cover member 6 and the bottom plate 22, and only the cooling air F1 is taken into the intake port 11 of the cover member 6 attached to the main body 1 (FIG. 4). The cooling air F1 passes through the air inlet 25 of the bottom plate 22 facing the air inlet 11 and is guided to the internal space of the housing chamber 8, and hot air generated around the electronic component 31 is exchanged with the cover member 6 and the air. Is sent to the air blower 33 side on the opposite side.

  The blower 33 uses the centrifugal force of the rotating fan 35 to send the cooling air F1 and hot air taken from the electronic component 31 side to the inlet 34A of the duct 34 as mixed air F. Here, the air F is led from the blower 33 to the inside of the duct 34 so that the mixed air F does not pass through the electronic component 31 again, and passes through the exhaust port 37 on the side surface of the main body 1 to the outside of the heating cooker. Is discharged.

  Moreover, since the outer member of the main body 1 including the bottom plate 22 is made of metal, the temperature of the bottom plate 22 rises to some extent due to heat conduction from the electronic component 31. However, if the rib 12 is surrounded by the above-described rib 12, the rib 12 acts as a guide for the cooling air F1, and hot air heated around the bottom plate 22 is blocked by the rib 12. Thus, it is possible not to lead to the intake port 11. As a result, only the cooling air F <b> 1 can be efficiently taken into the housing chamber 8 inside the main body 1 from the air inlet 11 of the cover member 6.

  Furthermore, by providing the notch 16 in a part of the rib 12, the intake position of the cooling air F1 from the notch 16 to the intake port 11 can be defined. In particular, as in the present embodiment, if the notch 16 is provided on the front side of the heating cooker on the side opposite to the main body 1 including the bottom plate 22, the main body while taking advantage of the effect of providing the rib 12 It is possible to take in the cooling air F1 very efficiently from the direction in which the heat influence from 1 is small.

  As described above, in the present embodiment, in the heating cooker provided with the main body 1, the main body 1 includes the oven chamber 2 that accommodates the food to be cooked and the door 3 that can be opened and closed to close the front opening of the oven chamber 2. The lower member has a cover member 6 which is a separate member from the main body 1, and an air inlet 11 is provided in the cover member 6 as a first air inlet for taking air into the main body 1. 11, an intake port 25 that communicates with the inside of the main body 1 is provided in a bottom plate 22 that forms an outer member of the main body 1.

  In this case, the peripheral portion of the cover member 6 provided with the intake port 11 and the peripheral portion of the bottom plate 22 provided with the intake port 25 naturally overlap each other, and the cover member 6 is heated from between the cover member 6 and the bottom plate 22 in the vicinity of the intake port 11. A gap that allows air to enter the air inlet 11 is not formed. Therefore, only the cooling air F1 can be taken into the main body 1 from the intake port 11 without being affected by the alignment of the main body 1 and the cover member 6 which are a plurality of parts.

  In the present embodiment, the intake port 11 provided in the cover member 6 is surrounded by a rib 12 which is a convex wall, and the rib 12 is configured to be in contact with the grounding surface S of the heating cooker. As another component, for example, by providing a packing 24 that is more elastic than the main body 1 and the cover member 6, the cover member 6 is configured to be in contact with the grounding surface S of the heating cooker so that the cover member 6 functions as a leg cover.

  In this case, the rib 12 serves as a guide for the cooling air F1, and the cooling air F1 is cut off from the originally unnecessary hot air so that only the cooling air F1 is supplied from the intake port 11 of the cover member 6. It can be efficiently taken into the storage chamber 8 inside the main body 1. Further, the cooking device including the main body 1 and the cover member 6 can be supported on the ground surface S by using the ribs 12 and the packing 24 which is a separate part.

  Further, in this embodiment, the intake port 11 provided in the cover member 6 is surrounded by a rib 12 which is a convex wall, and at least one notch 16 for taking in the cooling air F1 is provided in the rib 12. .

  Also in this case, the rib 12 serves as a guide for the cooling air F1, and the cooling air F1 is shielded from unnecessary hot air, so that only the cooling air F1 is taken into the intake port 11 of the cover member 6. In addition to being able to efficiently take in the storage chamber 8 inside the main body 1, the position where the cooling air F <b> 1 is taken into the intake port 11 can be designated by the notch 16.

  Further, the intake port 11 of the cover member 6 in the present embodiment is configured by a hole 11A as a punched hole and a hole 11B as a louver hole.

  In this case, by using the air inlet 11 as a hole 11A or a hole 11B as a louver hole, the user can be prevented from accidentally touching the electronic component 31 or the like inside the main body 1 from the air inlet 11 with a finger.

  In addition, this invention is not limited to the said Example, For example, the inlet 25 of the main body 1 can employ | adopt various hole shapes similarly to the inlet 11 of the cover member 6. FIG. Further, the height of the rib 12 may not be the same at any part, but may be configured such that a part of the rib 12 is in contact with the ground contact surface S by partially different heights. In addition, various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Main body 2 Oven cabinet 6 Cover member 11 Air inlet (1st air inlet)
11A hole (hole)
11B hole (louver hole)
12 ribs (walls)
16 Notch 24 Packing (separate parts)
25 Air intake (second air intake)

Claims (4)

In a heating cooker equipped with a main body with an oven for storing the food to be cooked,
A cover member at the bottom of the body;
The cover member is provided with a first air inlet for taking air into the main body,
A heating cooker characterized in that a second air intake port is provided in the main body so as to face the first air intake port. Surrounding the first inlet with a wall;
The said wall is comprised so that it may contact with the ground surface of the said heating cooker, or it comprised so that another part might be provided in the said cover member, and it might be comprised so that it might contact with the ground surface of the said cooking device. Cooking cooker. Surrounding the first inlet with a wall;
The cooking device according to claim 1 or 2, wherein a notch for taking in air is provided in the wall. The cooking device according to any one of claims 1 to 3, wherein the first intake port is a punched hole or a louver hole.