JP5693356B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device having an infrared sensor, for example.

  A conventional cooking device includes a cooling fan for electric parts such as a power source, a circuit board, and a magnetron, and an infrared sensor that is installed in the same space as the electric parts and detects the temperature of an object to be heated in the heating chamber. Cooling. (For example, refer to Patent Document 1).

JP-A-2006-349198 (page 4, FIG. 2)

However, in the conventional cooking device described above, the air path from the cooling fan to the infrared sensor is a wide space, and the wind speed of the cooling air reaching the infrared sensor installed at a position away from the cooling fan is reduced. Therefore, it is necessary to increase the size of the cooling fan in order to obtain a sufficient cooling effect.
Further, even if the cooling fan and the infrared sensor can be arranged close to each other, there is a problem that the infrared sensor cannot be sufficiently cooled when the infrared sensor deviates from the air path of the cooling fan.

  The present invention was made to solve the above-described problems, and sufficiently cools the infrared sensor and electric parts such as a power supply, a circuit board, and a magnetron with a simple configuration without increasing the size of the cooling fan. An object is to provide a cooking device capable of cooking.

The cooking device according to the present invention detects the temperature of an object to be heated stored in a heating chamber from a main body case, a heating chamber disposed in the main body case, and an opening provided on a side surface of the heating chamber. An infrared sensor, a first cooling fan that sucks outside air outside the main body case and blows outside air into the space outside the heating chamber, and outside air outside the main body case is sucked and inside the heating chamber A second cooling fan that blows air, a sensor cooling air passage that guides a part of the outside air blown by the first cooling fan toward the infrared sensor, and is disposed in the body case for heating A magnetron that heats an object to be heated stored in the cabinet, a power supply unit that is arranged adjacent to the magnetron and drives the magnetron, supports the power supply unit inside, and external air blown by the first cooling fan The outside air supply duct For example, the sensor cooling air passage is formed by arranging in the space between the compartment outside air supply duct and the magnetron.

  According to the present invention, since a part of the internal air blown by the first cooling fan can be efficiently applied to the infrared sensor, the cooling effect of the infrared sensor can be enhanced without increasing the size of the cooling fan. it can.

It is a perspective view which shows the external appearance of the heating cooker which concerns on Embodiment 1. FIG. It is a perspective view which shows the inside of the heating cooker which concerns on Embodiment 1. FIG. It is a perspective view which decomposes | disassembles and shows the back case of the heating cooker of FIG. It is a schematic diagram of the cross section which cut | disconnects and shows the front side of the heating cooker of FIG. It is a schematic diagram of the cross section which cut | disconnects and shows the side surface side of the heating cooker of FIG. It is a disassembled perspective view of the external air supply duct and cooling air guide of the heating cooker which concerns on Embodiment 1. FIG. It is a schematic diagram of the cross section which cut | disconnects and shows the upper surface side of the external air supply duct and external cooling fan of the heating cooker which concerns on Embodiment 1. FIG. It is the front view, sectional drawing, and bottom view which expand and show the main body exhaust apparatus of the heating cooker which concerns on Embodiment 1. FIG. The perspective view which shows the flow of the cooling air (external air) from the side inlet and the lower inlet through the external air supply duct to the first outdoor air vent in the heating cooker of the first embodiment. FIG. In the heating cooker according to the first embodiment, cooling air (outside the chamber) from the side inlet and the lower inlet through the space between the outside air supply duct and the magnetron to the first outside air vent It is a perspective view which shows the flow of air. In the heating cooker according to the first embodiment, cooling air (outside the chamber) from the side inlet and the lower inlet through the space between the outside air supply duct and the magnetron to the first outside air vent It is a schematic diagram of the front side cross section showing the flow of air. In the heating cooker according to the first embodiment, cooling air (outside the chamber) from the side inlet and the lower inlet through the space between the outside air supply duct and the magnetron to the first outside air vent It is a schematic diagram of the side surface side cross section which shows the flow of air. It is a perspective view which shows the flow of the cooling air (compartment air) from a side inlet and a lower inlet to an interior vent in the heating cooker of Embodiment 1. It is a perspective view which shows the flow of the cooling air (external air and internal air) discharged | emitted from a main body exhaust apparatus following FIGS. 9-13.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the heating cooker according to the present invention will be described with reference to the drawings. First, the structure of the heating cooker of this Embodiment 1 is demonstrated using FIGS.
1 is a perspective view showing the appearance of the heating cooker according to Embodiment 1, FIG. 2 is a perspective view showing the inside of the heating cooker according to Embodiment 1, and FIG. 3 is a rear case of the heating cooker of FIG. FIG. 4 and FIG. 5 are respectively a schematic view of a cross section cut and shown by cutting the front side of the heating cooker of FIG. 2, a schematic view of a cross sectional view shown by cutting the side face, and FIG. Fig. 7 is an exploded perspective view of the outside air supply duct and the cooling air guide of the heating cooker according to the first embodiment, and Fig. 7 is an upper surface of the outside air supply duct and the outside cooling fan of the heating cooker according to the first embodiment. It is a schematic diagram of the cross section which cuts and shows the side.

  In the figure, the heating cooker 100 according to the first embodiment is applied to, for example, a microwave oven, and is provided in a main body case 1 with a rear case 3 provided at the rear and a front part of the main body case 1 so as to be rotatable. A door 2 is provided. A handle 4 is attached to the upper center of the door 2, and an operation panel 5 having a display unit 5 a is provided on one side of the front surface of the door 2. The upper frame 3p of the back case 3 is provided with an exhaust port of a main body exhaust device 6 to be described later, and the side frame 3q on one side of the back case 3 has a side portion formed of a plurality of rectangular holes. An intake port 3a is provided.

  As shown in FIG. 3, the back case 3 described above includes a first back plate 3g that covers the back of the main body case 1 and a second back plate 3d that is joined to the first back plate 3g with a space. It consists of and. The first back plate 3g is provided with a rectangular recess 3h having substantially the same size as a back plate 7e of the heating chamber 7 described later. When the heating chamber 7 is attached to the first back plate 3g, it is fixed by screwing so as to cover the recess 3h. In that case, a gap exists between the back plate 7e of the heating chamber 7 and the recess 3h.

  The upper surface of the first back plate 3g is provided with a first rectangular outer vent 3b and an inner vent 3c extending in the lateral direction, and a rectangular shape extending in the vertical direction on the left side. The second outside vent 3i is provided. An upper suction port 3k and a lower suction port 3l made up of a plurality of punch holes are provided on the right side surface of the first back plate 3g, and the recess 3h of the first back plate 3g extends in the lateral direction. The outside vent hole 3j is provided.

  The second back plate 3d has an upper frame 3p and a side frame 3q that are bent at right angles to the first back plate 3g. The upper frame 3p of the second back plate 3d is provided with a notch 3e for projecting the exhaust port cover 62a of the main body exhaust device 6. The second back plate 3d is provided with a plate-like partition plate 3f on the side frame body 3q side where the side air inlet 3a is provided. When the back case 3 is configured by combining the first back plate 3g and the second back plate 3d, a lower intake port 3m and a lower exhaust port 3n are formed with the partition plate 3f as a boundary.

  In the main body case 1, as shown in FIGS. 2, 4, and 5, a rectangular box heating chamber 7 having a front opening is provided. The front opening of the heating chamber 7 is opened and closed by the door 2 described above. A heat insulating material 8 that covers the mica heater 17 and the mica heater 17 is attached to the upper surface plate 7 c of the heating chamber 7. The mica heater 17 is a planar heating element for heating an object to be heated stored in the heating chamber 7 from above. The side plate 7d on one side of the heating chamber 7 is provided with an in-chamber supply port 7a made up of a plurality of punch holes, and an in-house exhaust port 7b made up of a plurality of punch holes is provided at the rear part of the top plate 7c. ing. The internal exhaust port 7 b and the above-described internal air vent 3 c are communicated with each other through an exhaust duct 16.

  Moreover, as shown in FIG. 4, the back plate 7e of the heating chamber 7 is provided with a suction port 22 and a blow-out port 23 each made up of a plurality of punch holes. The suction inlet 22 and the blower outlet 23 are connected with the convection unit 7g provided in the outer side of the backplate 7e of the heating chamber 7 (refer FIG. 3). The convection unit 7g is constituted by a convection heater including a convection fan disposed to face the suction port 22 and a quartz glass tube heater disposed to face the air outlet 23. The convection fan is rotatably connected to a motor installed at the bottom of the main body case 1 through a belt. A pair of guide rails 7h provided at positions lower than the center of the chamber are provided on both side surfaces in the heating chamber 7, and the ceramic plate 7i is detachably supported. The convection fan sucks the air in the heating chamber 7 from the suction port 22, raises the air to a high temperature by the convection heater, blows out the high-temperature air from the outlet 23, and blows hot air into the upper space defined by the ceramic plate 7 i in the chamber Is circulated to heat the object to be heated in the heating chamber 7.

  By the way, in the case where the height of the heating chamber in the heating chamber with respect to the width or depth is set to 1/2 or more as in the conventional case, the object to be heated is heated in addition to the range heating function. In the case of having an oven heating function that heats by, for example, the inner wall surface of the heating chamber also enters the radiation area of the heater. For this reason, not only a to-be-heated material but a heating chamber wall surface is heated, and a thermal energy loss becomes large.

  In the heating cooker according to Embodiment 1 of the present invention, the width and depth of the heating chamber in the heating chamber 7 are each about 300 mm, and the height is about 150 mm. That is, the height dimension with respect to the width or depth dimension is set to about ½, but it is desirable to set it to ½ or less from the viewpoint of heating efficiency. That is, since the surplus space in the height direction of the heating chamber is small, the inner wall surface of the heating chamber does not enter the radiation area of the mica heater 17 and the sheathed heater 18, and most of the radiant heat from the upper and lower heaters 7a and 7b. Can be applied to the object to be heated, the heat energy loss transmitted to the wall surface of the heating chamber is small, and the heating time can be greatly shortened.

  In addition, the heating time is greatly shortened and the heat energy loss transmitted to the inner wall of the heating chamber is reduced, so that the temperature in the heating chamber does not rise even after heating the heater, and there is a risk of burns even when using a range immediately. Disappear.

  The outside cooling fan 9 (first cooling fan) provided at a distance from the heating chamber 7 is arranged such that the suction side faces the upper suction port 3k provided on the first back plate 3g of the back case 3. is set up. On the air blowing side of the outside cooling fan 9, an outside air supply duct 10 that supports the power supply substrate 11 (power supply unit) is provided. The power supply substrate 11 is a power supply for driving the magnetron 14 disposed adjacent to the power supply substrate 11. On the power supply substrate 11, heat generating components such as a voltage conversion coil 11 a and a heat sink 11 b of a high frequency switching element, and other electric circuit components are mounted. It is location. Cooling air (outside the box air) from the outside cooling fan 9 cools these heat generating components when passing through the outside air supply duct 10. Then, the cooling air that has passed through the outside air supply duct 10 is blown forward of the heating cooker 100 (in the direction of the door 2) along the side surface of the heating chamber 7. Thereafter, the periphery of the control board 12 installed on the bottom of the main body case 1 and the heating chamber 7 is cooled.

  The side plate 7d of the heating chamber 7 is provided with a recess 72 for installing an infrared sensor unit 71 for detecting the temperature of an object to be heated housed in the heating chamber and a sensor opening 73. As shown in FIG. 4, in the infrared sensor unit 71, a sensor element 71b and an electric circuit component (not shown) are placed on a sensor board 71a, and holder openings 71c and 71e that ventilate the sensor board 71a and the sensor element 71b. It is fixed to the side plate 7d in a downward state by a sensor holder 71d having

  The position (height) where the infrared sensor unit 71 is set with respect to the heating chamber 7 is above the guide rail 7h so that at least the temperature of the object to be heated placed on the ceramic plate 7i can be detected. desirable. Further, in order to detect the temperature of the entire object to be heated, it is desirable that the infrared sensor unit 71 is provided as high as possible in the heating chamber 7 and the direction in which the infrared sensor unit 71 is directed is downward.

  As shown in FIG. 6, the external air supply duct 10 is composed of an external air supply duct upper case 10a and an external air supply duct lower case 10b, and the external air supply duct upper case 10a is suspended from the inner upper surface. The outside air supply duct lower case 10b is provided with a pair of cooling air guiding ribs 10d and 10e on the outer lower surface.

  The cooling air correction rib 10c efficiently cools the cooling air from the outside cooling fan 9 by applying it to the voltage conversion coil 11a on the power supply board 11 provided in the outside air supply duct 10 and the heat sink 11b of the high frequency switching element. The angle and interval are adjusted to enhance the effect.

  The internal cooling fan 13 (second cooling fan) installed below the external cooling fan 9 is such that the suction side faces the lower suction port 3l provided in the first back plate 3g of the back case 3. is set up. A cooling air guide 10 f having an inclined surface that guides cooling air to the magnetron 14 is provided on the air blowing side of the internal cooling fan 13. The magnetron 14 is provided with a permanent magnet 14a for generating a magnetic field for generating microwaves and a heat dissipating fin 14b for dissipating heat generated by driving so as to be cooled by air from the outside. It is cooled by the air that has passed through the cooling air guide 10a.

  The magnetron 14 is connected to the air supply opening 7 a of the heating chamber 7 by an internal air supply duct 15, and the air sent from the internal cooling fan 13 is supplied into the heating chamber 7. The air is exhausted from the internal exhaust port 7b.

  The magnetron 14 is installed with the antenna 14c for outputting microwaves facing downward, and the upper outer surface is a distance of about 5 mm from the lower outer surface of the lower air supply duct lower case 10b as shown in FIGS. Are facing each other.

  As shown in FIG. 4, the outside air supply duct 10 disposed adjacent to the magnetron 14 and the upper part thereof is disposed between the heating chamber 7 and the space in order to avoid the influence of heat from the heating chamber 7 that becomes high temperature. Be placed. As a result, the infrared sensor unit 71 is separated from the cooling air passage that passes through the inside of the external air supply duct 10. Therefore, the cooling air blown to this cooling air passage cannot cool the infrared sensor unit 71 efficiently. Here, it is conceivable that a rib or the like is provided inside the external air supply duct 10 to deflect the cooling air from the outlet of the external air supply duct 10 in the direction of the infrared sensor unit 71. There exists a possibility that the wind speed of the cooling air which should be ventilated around the heating chamber 7 to want may fall.

  Therefore, a sensor cooling air passage for cooling the infrared sensor unit 71 is formed in the space between the outside air supply duct 10 and the magnetron 14. Then, the infrared sensor unit 71 is disposed at substantially the same height as the space between the outside air supply duct 10 and the magnetron 14.

  The cooling air guide rib 10d provided on the lower case 10b on the outside air supply duct is a curved rib having a height of about 5 mm, and the upper outer surface of the magnetron 14 and the lower side on the outside air supply duct facing it. While separating the lower outer surface of the case 10b, the air passing through the sensor cooling air passage in this space is directed to the lateral direction.

  The cooling air guiding rib 10 e is a rib having a height of about 15 mm, and a part of the rib is provided along the upper side surface of the magnetron 14. The cooling air guiding rib 10e restricts the air directed laterally by the cooling air guiding rib 10d from diffusing around the upper surface of the magnetron 14.

  The cooling air guiding rib 10d and the cooling air guiding rib 10e constitute an outside air guide part.

  The upper surface of the cooling air guide 10f forms an air passage with the lower surface of the lower case air supply duct lower case 10b, the upper surface of the magnetron 14, the lower surface of the lower case air supply duct lower case 10b, and the cooling air guide ribs. Air from the outside cooling fan 9 is guided to the sensor cooling air passage formed by 10d and 10e.

  The sensor cooling air passage is provided in a space between the external air supply duct 10 and the magnetron 14. The cooling air guide ribs 10 d and 10 e are provided so as to gradually approach each other while being curved, and the air from the outside cooling fan 9 is sent out toward the side plate 7 d side of the heating chamber 7. The air sent from the sensor cooling air passage is applied to the periphery of the infrared sensor unit 71 provided on the side plate 7d.

  Thus, in the heating cooker 100 of Embodiment 1, the height at which the infrared sensor unit 71 is provided is set to be substantially the same as the height between the outer lower surface of the external air supply duct 10 and the outer upper surface of the magnetron 14. Then, by applying the cooling air of the sensor cooling air passage in the space between the outer lower surface of the outside air supply duct 10 and the outer upper surface of the magnetron 14 to the periphery of the infrared sensor unit 71, the infrared sensor unit 71 is efficiently Can be cooled.

  In addition, the sensor cooling air passage has a cross-sectional area that is downstream of the upstream side of the sensor cooling air passage (upstream end of the cooling air guide ribs 10d and 10e) (downstream end of the cooling air guide ribs 10d and 10e). Since it is small, the wind speed of the outside air flowing through the sensor cooling air passage is faster on the downstream side than on the upstream side. Further, since the cross-sectional area of the sensor cooling air passage is gradually reduced, the disturbance of the flow of outside air in the sensor cooling air passage is suppressed, and the pressure loss is reduced. As a result, an air flow having a high wind speed is generated, the wind speed of the outside air applied to the infrared sensor unit 71 is increased, and the cooling effect of the infrared sensor unit 71 is increased.

The cooling air guiding rib 10d and the cooling air guiding rib 10e are provided on the lower outer surface of the lower case air supply duct lower case 10b, but may be provided on the upper outer surface of the magnetron 14.
Moreover, although the outside air guide part was comprised with the rib, you may comprise a groove | channel in either one or both of the lower outside surface of the outside air supply duct lower case 10b, the upper outside surface of the magnetron 14, or both. Good.

  Moreover, since the holder openings 71c and 71e are formed in the sensor holder 71d of the infrared sensor unit 71, the sensor element 71b can be effectively cooled.

  A sheathed heater 18 is installed below the bottom plate 7f of the heating chamber 7 to heat an object to be heated stored in the heating chamber 7 from below. Further, a rotating antenna 19 and an antenna motor 20 that rotates the rotating antenna 19 are installed with the center of the sheathed heater 18 as a substantially axial center. A waveguide 21 for propagating microwaves oscillated from the magnetron 14 during range heating to the rotating antenna 19 is provided below the bottom plate 7 f of the heating chamber 7. The microwave is radiated into the heating chamber of the heating chamber 7 by the rotating antenna 19 to heat the object to be heated.

Next, the configuration of the main body exhaust device 6 will be described with reference to FIG.
FIG. 8 is an enlarged front view, sectional view, and bottom view of the main body exhaust device of the heating cooker 100 according to the embodiment.
The main body exhaust device 6 includes an exhaust cover 61a, an exhaust port cover 62a provided on the upper portion of the exhaust cover 61a, and a separator plate 63a as a separating means.

  The exhaust cover 61a has substantially the same length as the width of the recess 3h provided in the first back plate 3g, has a cross section formed in an unequal mountain shape, and is provided with side plates 61b at both ends thereof. One rectangular opening 61d is provided in a portion of the short side plate 61c (horizontal side) of the exhaust cover 61a on the exhaust port cover 62a side. The exhaust port cover 62a protrudes upward from the short side plate 61c of the exhaust cover 61a so as to cover the opening 61d described above, and one rectangular opening 62b is provided on the first back plate 3g side. ing. The opening 62b is inclined backward as it goes upward from the short side plate 61c. The opening 62b is provided with a plurality of ribs 62c.

  The separator plate 63a is made of, for example, an aluminum material that extends rearward from the rib 62c and is bent downward at a right angle. The separator plate 63a faces the first outside vent 3b provided in the first back plate 3g, and is bent obliquely from the approximate center of the exhaust cover 61a toward the first back plate 3g. The opening 62b of the exhaust port cover 62a is vertically separated by the bent upper end of the separator plate 63a. The upper part is used as an internal air exhaust port 62d, and the lower part is used as an external air exhaust port 62e.

  When the exhaust cover 61a configured as described above is attached to the first back plate 3g from behind, the side plates 61b on both sides of the exhaust cover 61a are placed on top of the recesses 3h of the first back plate 3g, The first outside vent 3b and the inside vent 3c are covered. At that time, the tip of the inclined portion of the separator plate 63a comes into contact with the first back plate 3g on the right side of the first outside vent 3b, and the other side plate 61b of the exhaust cover 61a and the first back plate 3g. The upper portion of the recess 3h covers the first outside-ventilation vent 3b. The separator plate 63a forms an exhaust air passage that communicates the first outside air vent 3b and the outside air exhaust port 62e of the exhaust port cover 62a. Further, the above-described separator plate 63a forms another exhaust air passage that communicates the internal vent 3c and the internal air exhaust 62d of the exhaust cover 62a.

Here, the flow of cooling air (external air and internal air) when the object to be heated in the heating chamber 7 is heated will be described with reference to FIGS.
FIG. 9 shows cooling air (outside air) from the side air inlet and the lower air inlet through the outside air supply duct to the first outside air vent in the heating cooker according to the first embodiment. FIG. 10, FIG. 11, and FIG. 12 show the flow through the lower surface of the external air supply duct from the side air inlet and the lower air inlet, respectively, in the cooking device of the first embodiment. It is a perspective view which shows the flow of the cooling air (external air) until it reaches an external vent, the schematic diagram of the front side cross section of the heating cooker of FIG. 10, and the schematic diagram of a side surface side cross section. 13 is a perspective view showing the flow of cooling air (inside air) from the side air inlets and the lower air inlets to the inside air vents in the heating cooker according to Embodiment 1, and FIG. FIG. 13 is a perspective view showing a flow of cooling air (outside-compartment air and inside-compartment air) discharged from the upper exhaust part following 13.

First, the flow of cooling air will be described with reference to FIG.
When the outside air is sucked from the side air inlet 3a and the lower air inlet 3m by driving the outside air cooling fan 9, the outside air is further sucked from the upper air inlet 3k by the outside air cooling fan 9 and stored as cooling air. It is guided into the external air supply duct 10 and discharged into the main body case 1. The cooling air cools the heat generating parts such as the voltage conversion coil 11a on the power supply board 11 installed in the outside air supply duct 10, the heat sink 11b of the high frequency switching element, and other electric circuit parts, and then The periphery of the control board 12 installed on the bottom and the heating chamber 7 is cooled.

  One of the cooling air that has cooled the above-described electrical components flows above the heating chamber 7 and the other flows below the heating chamber 7 by the side plate 7 d of the heating chamber 7. The cooling air that has flowed upward reaches the first outdoor vent 3b while cooling the upper portion of the main body case 1 that is warmed by heat radiation from the upper surface plate 7c and the heat insulating material 8 of the heating chamber 7. The cooling air that has flowed downward is pushed up into the space between the main body case 1 and the heating chamber 7 while cooling the bottom of the main body case 1 that is warmed by heat radiation from the bottom plate 7f of the heating chamber 7 and the sheathed heater 18. To the first outdoor vent 3b.

  When the air passing through the outside air supply duct 10 exits into a large space outside the duct, it diffuses and cools nearby electrical components over a wide range. However, since the wind speed decreases, the heat transfer efficiency decreases.

  The infrared sensor unit 71 is provided at a position on the upper side of the side plate 7d of the heating chamber 7 and out of the region through which the cooling air in the external air supply duct 10 passes. The cooling effect of the infrared sensor unit 72 is small.

Next, the flow of internal air will be described with reference to FIGS.
The outside air sucked by driving the outside cooling fan 9 is guided into the outside air supply duct 10 as described above, and is formed by the lower surface of the outside air supply duct lower case 10b and the upper surface of the cooling air guide 10f. It is also led to the wind path. And it guide | induces to the air path formed by the upper surface of the magnetron 14, the lower surface of the external case air supply duct lower case 10b, and the cooling air induction | guidance ribs 10d and 10e, and a wind speed is reduced with the reduction | decrease of the cross-sectional area of an air path. To increase.

  The cooling air with increased wind speed is sent toward the side plate 7d of the heating chamber 7 to cool the infrared sensor unit 71. The cooling air flows into the infrared sensor unit 71 through the holder openings 71c and 71e, and the sensor element 71b is effectively cooled. The air that has cooled the infrared sensor unit 71 is combined with the air that has passed through the above-described outside air supply duct 10 to cool the electrical components, and the first outside air vent 3b while cooling the upper part of the main body case 1. To.

Next, the flow of the internal air will be described with reference to FIG.
When outside air is sucked from the side air inlet 3a and the lower air inlet 3m by driving the inside cooling fan 13, the outside air is further sucked from the lower air inlet 3l by the inside cooling fan 13, and the cooling air guide 10f. Then, the heat generating part of the magnetron 14 is cooled, and then guided into the internal air supply duct 15 and sent out from the internal air supply port 7a into the heating chamber 7. The internal air that has flowed into the heating chamber 7 is discharged from the internal exhaust port 7b together with the vapor released from the object to be heated by the microwave, and passes through the exhaust duct 16 to the internal vent 3c.

Next, the flow of cooling air and internal air discharged from the upper exhaust part 62 to the outside will be described with reference to FIG.
The cooling air reaching the first outside vent 3b flows upward through an exhaust air passage formed by the separator plate 63a of the exhaust cover 61a, the first back plate 3g, and the recess 3h, and the exhaust cover 62a. The outside air exhaust port 62e is discharged to the outside obliquely upward.

  On the other hand, the internal air containing the steam reaching the internal air vent 3c flows into the exhaust air passage formed by the exhaust cover 61a, the separator plate 63a, the first back plate 3g, and the recess 3h, and the separator plate 63a. Thus, the air is guided to the internal air exhaust port 62d side, and is discharged to the outside substantially horizontally from the internal air exhaust port 62d. At that time, the internal air containing the steam is mixed with the cooling air exhausted obliquely upward from the external air exhaust port 62e when being exhausted from the internal air exhaust port 62d. When the above-mentioned inside air is hotter than the outside air and is sent into the exhaust cover 61a, the inside air is heat-exchanged with the outside air via the separator plate 63a, and is further discharged from the inside air exhaust port 62d. Since it is mixed with the outside air discharged from the outside air exhaust port 62e at the time, the temperature becomes low.

  The cooling air that has flowed into the space between the main body case 1 and the heating chamber 7 passes through the second outside vent 3i and is discharged to the outside from the lower exhaust port 3n provided in the back case 3. . Furthermore, the cooling air that has flowed above the heating chamber 7 flows into the recess 3h through the gap between the heating chamber 7 and the recess 3h provided in the first back plate 3g of the back case 3, It flows from the third outside vent 3j to the aforementioned lower exhaust 3n.

  The cooking device 100 according to the embodiment has cooking functions of range heating, grill heating, and oven heating. During the range heating, the magnetron 14 radiates microwaves into the heating chamber 7, and the object to be heated is heated from the inside. When the grill is heated, the mica heater 17 and the convection unit 7g apply radiant heat on the inner top surface of the heating chamber 7 and hot air from the back surface to the object to be heated, thereby heating the surface. During the oven heating, the mica heater 17 and the sheathed heater 18 apply radiant heat on the inner top and bottom surfaces of the heating chamber 7 to the object to be heated, thereby heating the surface. The cooking device 100 has a cooking function of range grill heating that automatically switches to grill heating after range heating, and the heated object is automatically switched to heating by radiant heat after heating by microwaves. When this range grill heating is used, the inside of the object to be heated can be sufficiently heated and the surface can be burnt with a short heating time.

  The heating cooker 100 of this Embodiment detects the temperature of the to-be-heated object in the heating chamber 7 with the sensor element 71b of the infrared sensor unit 71 at the time of range heating, and controls the range heating time by a microwave. During the range heating, the internal cooling fan 13 is driven to cool the magnetron 14, and cooling air is supplied into the heating chamber 7 to discharge the steam generated from the object to be heated to the outside. The outside cooling fan 9 is also driven at the same time to cool the power supply board 11 and other electric components.

  Also, during grill heating and oven heating, the temperature of the object to be heated is not detected by the infrared sensor, and the heating time is controlled by a thermistor (not shown) provided in the heating chamber 7. At this time, only the outside cooling fan 9 is driven, and cooling air flows outside the storage.

  When grill heating and oven heating are performed, the temperature in the heating chamber 7 rises to about 200 degrees, so that the infrared sensor unit 71 also becomes high temperature and accurate temperature detection cannot be performed. In this state, in order to perform control by detecting the temperature of the infrared sensor in the range heating, after the grill heating and the oven heating are finished, the outside cooling fan 9 and the inside cooling fan 13 are driven simultaneously, and the infrared sensor The unit 71 is cooled.

  In the range heating step during the range grill heating, both the outside cooling fan 9 and the inside cooling fan 13 are driven. In the grill heating step, both the outside cooling fan 9 and the inside cooling fan 13 are driven, but the number of rotations of the inside cooling fan 13 can be suppressed to a low level. Thereby, the temperature rise of the infrared sensor unit 71 can be suppressed even in the grill heating step. Further, by performing range grill heating with the ceramic plate 7i supported on the guide rail 7h, the bottom plate 7f of the heating chamber 7 is shielded from the radiant heat of the mica heater 17 and the hot air by the convection 7g by the ceramic plate 7i. Therefore, the range heating control using the infrared sensor can be performed continuously by removing the ceramic plate 7i after the end of the range grill heating.

  In the embodiment, the description has been given of the configuration in which only the outside cooling fan 9 is driven during grill heating and oven heating. However, the present invention is not limited to this, and the inside cooling fan 13 is also driven simultaneously. However, the internal cooling fan 13 may be driven with a reduced number of revolutions.

  As described above, according to the present embodiment, the temperature of the object to be heated stored in the heating chamber from the main body case, the heating chamber disposed in the main body case, and the opening provided on the side surface of the heating chamber. An infrared sensor for detecting the outside air, a first cooling fan for sucking outside air outside the main body case, and blowing outside air into a space outside the heating chamber, and sucking outside air outside the main body case, And a second cooling fan that blows the air inside the cabinet, and a sensor cooling air passage that guides part of the outside air blown by the first cooling fan toward the infrared sensor. It is possible to efficiently apply a part of the internal air that is blown to the infrared sensor unit, and to increase the cooling effect of the infrared sensor without increasing the size of the cooling fan.

  In addition, a magnetron that is disposed in the main body case and heats an object to be heated stored in the heating chamber, a power supply unit that is disposed adjacent to the magnetron and drives the magnetron, and internally supports the power supply unit, Since the outside air supply duct which passes the outside air which the cooling fan of 1 passes, and the sensor cooling air passage was provided in the space between the outside air supply duct and the magnetron, as the sensor cooling air passage A cooking space can be reduced in size without requiring a new space.

  In addition, the sensor cooling air passage is formed by the outer surface of the external air supply duct and the outer surface of the magnetron facing each other, and the external air guide portion provided on either the outer surface of the external air supply duct or the outer surface of the magnetron. Therefore, the existing structure can be diverted as a part of the sensor wind path, and the addition of a new structure is suppressed, and the cost can be reduced.

  Moreover, since the outside air guide part is comprised by one or more ribs, when guiding outside air to an infrared sensor, a wind direction and a wind speed can be adjusted with a simple structure with the shape and number of ribs.

  In addition, since the sensor cooling air passage has a smaller cross-sectional area of the sensor cooling air passage on the downstream side than the upstream side of the sensor cooling air passage, it is possible to increase the wind speed of the outside air that hits the infrared sensor, and the cooling of the infrared sensor Efficiency can be increased.

  In addition, the sensor cooling air passage has a cross-sectional area that continuously decreases in the direction in which the infrared sensor is installed, so that the air velocity of the outside air that is applied to the infrared sensor can be increased and the sensor cooling air passage can be increased. Disturbance of the flow of outside air in the cooling air passage is suppressed, and the cooling efficiency of the infrared sensor can be further increased.

  In addition, it is further provided with a waveguide provided in the lower part of the magnetron and propagating the microwave generated by the magnetron to the lower part of the heating chamber, and the power supply unit is arranged above the magnetron, so that the heating chamber in the heating chamber In the cooking device that supplies microwaves from below, the magnetron and the power supply unit can be arranged efficiently, and in addition, no new space is required as a sensor cooling air passage, and the cooking device can be downsized.

  Furthermore, since the heating chamber in the heating chamber has a height dimension that is ½ or less of the width or depth dimension, the extra space in the height direction of the heating chamber is reduced, and the heat transmitted to the wall surface of the heating chamber is reduced. Energy loss is also small and the heating time can be greatly shortened.

  DESCRIPTION OF SYMBOLS 1 Main body case, 2 Doors, 3 Back case, 3a Side inlet, 3b 1st exterior vent, 3c Interior vent, 3d 2nd back plate, 3e Notch, 3f Partition plate, 3g 1st Back plate, 3h recess, 3i second outside vent, 3j third outside vent, 3k upper inlet, 3l lower inlet, 3m lower inlet, 3n lower outlet, 3p upper frame, 3q side frame, 4 handle, 5 operation panel, 6 main body exhaust device, 61a exhaust cover, 61b side plate, 61c short side plate, 61d opening, 62a exhaust port cover, 62b opening, 62c rib, 62d Exhaust port, 62e External air exhaust port, 63a Separator plate, 7 Heating chamber, 7a Internal air supply port, 7b Internal exhaust port, 7c Top plate, 7d Side plate, 7e Back plate, 7f Bottom plate, 7g Convex Unit, 7h guide rail, 7i ceramic plate, 71 infrared sensor unit, 71a sensor board, 71b sensor element, 71c holder opening, 71d sensor holder, 71e holder opening, 72 recess, 73 sensor opening, 8 heat insulating material, 9 storages Outside cooling fan (first cooling fan), 10 outside air supply duct, 10a outside air supply duct upper case, 10b outside air supply duct lower case, 10c cooling air correction rib, 10d cooling air guiding rib (house) Outside air guide part), 10e Cooling air guide rib (outside air guide part), 10f Cooling air guide, 11 Power supply board (power supply part), 11a Voltage conversion coil, 11b Heat sink, 12 Control board, 13 Inside cooling fan ( Second cooling fan), 14 magnetron, 14a permanent Stone, 14b Radiating fin, 14c Antenna, 15 Air supply duct, 16 Exhaust duct, 17 Mica heater, 18 Seeds heater, 19 Rotating antenna, 20 Antenna motor, 21 Waveguide, 22 Suction port, 23 Air outlet, 100 Cooking cooker.

Claims (7)

A body case,
A heating chamber disposed in the main body case;
An infrared sensor that detects the temperature of an object to be heated stored in the heating chamber from an opening provided on a side surface of the heating chamber;
A first cooling fan that sucks outside air outside the main body case and blows outside air into a space outside the heating chamber;
A second cooling fan that sucks outside air outside the main body case and blows air in the heating chamber;
A sensor cooling air passage for guiding a part of the outside air blown by the first cooling fan toward the infrared sensor ;
A magnetron that is disposed in the main body case and heats an object to be heated stored in the heating chamber,
A power supply unit disposed adjacent to the magnetron and driving the magnetron;
An outside air supply duct that supports the power supply unit inside and allows the outside air blown by the first cooling fan to pass through;
The cooking device according to claim 1, wherein the sensor cooling air passage is provided in a space between the outside air supply duct and the magnetron . The sensor cooling air path includes an outer air guide section provided on one of the outer surface of the external air supply duct and the outer surface of the magnetron, and the outer surface of the external air supply duct or the outer surface of the magnetron. The heating cooker according to claim 1 , wherein The cooking device according to claim 2 , wherein the outside air guide part is constituted by one or more ribs. The heating according to any one of claims 1 to 3 , wherein the sensor cooling air passage has a cross-sectional area of the sensor cooling air passage that is smaller on the downstream side than on the upstream side of the sensor cooling air passage. Cooking device. The cooking device according to claim 4 , wherein the sensor cooling air passage is continuously reduced in a cross-sectional area of the sensor cooling air passage toward a direction in which the infrared sensor is installed. A waveguide that is provided at a lower portion of the magnetron and propagates microwaves generated by the magnetron to the lower portion of the heating chamber;
Heating cooker according to any one of claims 1 to 5, wherein the power supply unit is disposed above the magnetron. The cooking device according to any one of claims 1 to 6 , wherein the heating chamber in the heating chamber has a height dimension that is ½ or less of a width or a depth dimension.

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