Heating Regulator

Abstract

To provide a heating cooker including a grill chamber which has a smaller number of irregularities on the body front surface side to achieve good designability and cleanability.SOLUTION: A heating cooker includes: a pan placement part disposed on an upper surface of a body; a grill chamber disposed below the pan placement part and on a front surface of the body; a control board; and a main fan device which cools the control board. The grill chamber has: a heating chamber having an opening on its front surface; heating means configured to heat the interior of the heating chamber; and a door for covering the opening. The door has: a box body for covering the opening; and a handle unit disposed on the upper side of the box body. The handle unit has: a grip part formed by depressing a part of the front surface to the heating chamber side; and a cavity which is disposed at the heating chamber side relative to the grip part and in which multiple openings are provided on a wall surface. An air duct communicating with one of the openings is provided on the side of the grill chamber.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a cooking device equipped with a grill chamber. [Background technology]

[0002] Generally, most grill chambers are designed to heat both sides of food (food to be cooked), such as fish, simultaneously using heat sources such as sheath heaters or gas burners placed above and below the food.

[0003] In addition to grilling, in which food is heated by radiant heat from a heat source, the heating chamber of this grill cabinet can also be used to cook a variety of dishes, such as pizza, sweets, and cakes, by controlling the temperature inside the heating chamber. As a result, the frequency of use of grill cabinets and the duration of time they are held at high temperatures are increasing. The heating chamber of a grill cabinet is equipped with a temperature sensor such as a thermistor, and temperature control is performed based on the value detected by the temperature sensor.

[0004] The grill chamber has an opening in front of the cooking device, and a door is provided to cover the opening. For heat resistance and design reasons, the door generally has a glass plate on the front, which acts as a viewing window, and sheet metal is provided to avoid the viewing window and leave the interior hollow.

[0005] When placing food in the cooking chamber, the user pulls the handle on the door to open it. When cooking in the grill chamber, the heat supplied to the heat source causes the temperature inside the chamber to rise to over 200°C, which in turn causes the temperature of the door to rise. The temperature of the outer surface of the glass panel of the door can reach high temperatures of over 100°C, but the handle that the user touches when opening and closing the door needs to be designed to suppress this temperature rise. Typical handles have a handle that protrudes forward from the glass panel on the front side of the door, or is located below the glass panel, making it difficult for heat to be transferred from the glass panel.

[0006] Patent Document 1, for example, discloses a technique for designing a door to match the system kitchen in which the cooking appliance is installed, in which the handle is prevented from protruding forward from the glass plate, thereby reducing the temperature of the handle. Patent Document 1 discloses a technique in which the door has a closed surface facing the opening of the cooking chamber (grill chamber) and a surface located on the front side of the kitchen counter, and is equipped with a heat insulating structure (heat insulating material 6c in Figure 3 of the document, or air layer 31 in Figure 4) that suppresses heat conduction from the closed surface side to the surface side. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2017-40394 A Summary of the Invention [Problem to be solved by the invention]

[0008] As described above, in the technology described in Patent Document 1, in order to suppress heat transfer from the high-temperature air inside the refrigerator to the door, an insulating structure (insulating material 6c, air layer 31) is provided in the gap between the two to reduce the amount of heat transferred to the door. Therefore, as is clear from Figures 3 and 4 of the document, in a system kitchen with a specified depth, when the door is closed, the insulating structure provided on the heating chamber side of the door reduces the volume of the refrigerator where cooking takes place, limiting the size of food that can be placed inside the refrigerator.

[0009] Furthermore, due to the insulating structure, the distance from the door body to the cooking chamber is long, so the door body does not have a viewing window to allow direct inspection of the interior of the chamber, and the structure means that inspection can only be done indirectly by taking photographs (see embodiment 4 of Patent Document 1), which raises concerns that intuitive response in an emergency such as a fire may be delayed.

[0010] Furthermore, the handle located above the door is located above the cooking chamber, i.e., in an area where heat easily collects due to heat conduction caused by temperature increases in the cooking chamber walls and heat leakage from the contact surface between the door and the cooking chamber, resulting in insufficient cooling. The door's insulating structure is highly effective in reducing heat transfer, but the effectiveness of the insulating structure itself in lowering the temperature depends on the cooling performance of the door itself. In other words, the further behind the handle is located relative to the front decorative panel (door glass), the less likely natural convection occurs near the handle, preventing cooling air from flowing. This raises concerns about the handle's temperature rising due to insufficient cooling.

[0011] The object of the present invention is to solve the above problems and provide a cooking appliance with a grill compartment that is easy to design and clean, and that reduces the unevenness on the front side of the main body to prevent clothes and other items from getting caught during cooking, thereby improving kitchen workability. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, the present invention is characterized by a heating cooker comprising a pot holder arranged on the top surface of the main body, a grill compartment arranged below the pot holder and in front of the main body, a control board, and a main fan unit for cooling the control board, wherein the grill compartment has a heating chamber with an opening on the front, a heating means for heating the inside of the heating chamber, and a door covering the opening, the door having a box body covering the opening and a handle unit arranged above the box body, the handle unit having a handle portion formed by recessing a part of its front side toward the heating chamber, and a cavity arranged on the heating chamber side of the handle portion with multiple openings in the wall, and a ventilation duct arranged on the side of the grill compartment communicating with one of the multiple openings. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a cooking appliance that has a grill chamber that efficiently cools the handle, has few irregularities on the front side of the main body, and is easy to design and clean. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a perspective view of a cooking device according to a first embodiment of the present invention; [Figure 2] 1 is a perspective cross-sectional view of the cooking device of the first embodiment when the door is open; [Figure 3] 1 is an exploded perspective view of a cooking device according to a first embodiment of the present invention; [Figure 4] Front cross-sectional view taken along line AA in Figure 1 [Figure 5] Front cross-sectional view taken along line BB in Figure 1 [Figure 6] Side cross-sectional view taken along line CC shown in Figure 1 [Figure 7] Side cross-sectional view taken along line DD in Figure 1 [Figure 8] Schematic diagram of the heating cooker of Example 1 seen from above [Figure 9] Modification of the first embodiment [Figure 10] FIG. 10 is a perspective cross-sectional view of the cooking device of the second embodiment when the door is open. [Figure 11] Schematic diagram of cooking in Example 2 seen from above [Figure 12] 10 is a perspective view of the cooking device of the third embodiment when the door is open. [Figure 13] Schematic diagram of a side cross-sectional view of a grill chamber of Example 3 [Figure 14] Schematic diagram of a side cross-sectional view of the grill chamber of Example 4 DETAILED DESCRIPTION OF THE INVENTION

[0015] An embodiment of the cooking device of the present invention will be described in detail with reference to the drawings as appropriate. Note that, although a built-in IH cooking heater with a grill compartment will be exemplified below as an example of the cooking device, the present invention can also be applied to a free-standing IH cooking heater or a built-in or free-standing gas stove as long as it is a cooking device with a grill compartment. [Example]

[0016] First, the overall configuration of the cooking device 100 according to the first embodiment of the present invention will be outlined, and then the detailed structure of the grill chamber 5 will be described.

[0017] <Overall configuration of cooking device 100> The cooking device 100 of this embodiment is a cooking device equipped with an IH (Induction Heating) function that generates eddy currents in the bottom of a metal pot placed on the top surface and heats the metal pot itself with Joule heat due to the eddy currents, and a grill function that heats food stored in a heating chamber with radiant heat from a heater. Note that, as shown in Figure 1 etc., in the following, the front-back, up-down, and left-right directions are defined based on the line of sight of a user facing the cooking device 100.

[0018] The configuration of the cooking device 100 of this embodiment will be described below with reference to Figures 1 to 3. Figure 1 is a perspective view of the cooking device 100, Figure 2 is a perspective cross-sectional view of the cooking device when the door is open, and Figure 3 is an exploded perspective view of the cooking device 100. As shown in each figure, the cooking device 100 is a cooking device that includes a main body 1, a top plate 2, a heating coil 3, a base plate 7, and a base plate cover 4 that houses the base plate 7, and further includes a built-in grill chamber 5 to which the present invention is applied.

[0019] 3, the main body 1 is a housing having an outer shell corresponding to the space (predetermined left-right width, front-back width, and height) in which the cooking appliance 100 is to be installed, and is box-shaped (concave) with an open top. The main body 1 is provided with the grill chamber 5 on the lower left side, and the base plate 7 placed on the base stand 73 above the partition plate 1b covering the grill chamber 5, the lower casing 90b and impeller 91 constituting the main fan unit 9 are arranged in a flat plane, and the outlet which is the outlet part of the main fan unit 9 is arranged at a height including the surface of the base plate 7.

[0020] Here, the main fan unit 9 is a centrifugal fan made up of an impeller 91, casings 90a and 90b that sandwich the impeller 91 from above and below, and a motor 92 that penetrates the casing 90a and is connected to the impeller 91. In other words, the impeller 91 is housed in a space surrounded by the casing 90a that houses the motor 92 and the casing 90b that houses the intake duct 95, and is supported by the rotating shaft of the motor 92 so as not to come into contact with the casings 90a and 90b. Therefore, the main fan unit 9 has the rotating shaft of the impeller 91 in the vertical direction of the main body 1, and blows out air drawn in from below toward the base plate 7.

[0021] Such a main fan unit 9 is disposed upstream of the board 7, and by driving a motor 92, air is taken in through an intake duct 95 and supplied to the heat sink 75 on the board 7 covered by the board cover 4. In addition, a heating coil 3, a display unit P1, etc. are disposed above the board cover 4, and a top plate 2 is further provided to cover the board from above.

[0022] Here, the electronic components 71 on the board 7 are integrated circuits, inverter circuits, capacitors, resistors, etc. that are used to supply high-frequency current to the heating coil 3 and drive the main fan unit 9. The board base 73 is an insulating member (resin member) for fixing the board 7, and is fixed to the inner wall of the main body 1 or the partition plate 1b.

[0023] Heating coil 3 is installed below top plate 2, and a temperature sensor 34 for detecting the temperature of the bottom of the pot is installed near its center. Heating coil 3 is also located downstream of main fan unit 9, so that the cooling air blown out from main fan unit 9 cools board 7 below board cover 4, and then cools heating coil 3 via outlet 40a at the front corner of the main body. Heating coil 3 is a coil through which a high-frequency current flows when driven by an inverter circuit, and is mounted on coil base 31.

[0024] In this embodiment, one heating coil 3 is provided on the right, one on the left, and one at the rear center in plan view. The coil base 31 is supported by three supports 32 (e.g., springs), and these supports 32 apply an upward biasing force. This presses the heating coil against the underside of the top plate 2, maintaining a constant distance between the cooking pot and the heating coil 3.

[0025] The grill compartment 5 on the left front side of the main body 1 has an opening (not shown) that slides back and forth to place food to be cooked (not shown), and a door 6 is provided to cover the opening. Also, on the right front side of the main body 1, a front panel 1a is positioned so that it is roughly flat on the wide surface in front of the door 6, and a power switch P3 for turning the main power on and off is provided. The front panel 1a is shaped like a kangaroo pocket and is provided with an operating unit (not shown) for adjusting the heating level of the grill compartment. The top plate 2 is installed on top of the main body 1 and is made up of a glass plate (not shown) on which a cooking pot is placed and a frame (not shown) that holds the four sides of the glass plate.

[0026] The top plate 2 has a three-port pot mounting section 21 corresponding to the installation positions of the three heating coils 3, an operation section P0 for setting the heating level of a metal pot placed on the pot mounting section 21, and an exhaust opening H2. The exhaust opening H2 is the outlet for the air path that originates from the exhaust duct 59 of the grill chamber 5 (described later) and the intake opening H1, and is located at the rear (right and left sides) of the top plate 2.

[0027] <Grill Chamber 5 Configuration> Next, the configuration of the grill chamber 5 of this embodiment will be described with reference to Fig. 4 to Fig. 7. Fig. 4 is a front cross-sectional view of the cooking device 100 taken along line AA shown in Fig. 1, and Fig. 5 is a front cross-sectional view of the cooking device 100 taken along line BB shown in Fig. 1. Fig. 6 is a side cross-sectional view of the cooking device 100 taken along line CC shown in Fig. 1, and Fig. 7 is a side cross-sectional view of the cooking device 100 taken along line DD shown in Fig. 1.

[0028] As shown in the drawings, the grill chamber 5 of this embodiment has a box-shaped heating chamber 50 provided at the front opening through which food 57 is put in and taken out. This heating chamber 50 is made by assembling a plurality of members, each formed into a predetermined shape by pressing aluminum alloy plates, with screws or the like.

[0029] In heating chamber 50, food 57 is placed in a deep dish-shaped cooking pan 58 placed on wire rack 54 and cooked. Cooking pan 58 is a deep dish made of a material such as aluminum and formed in a rectangular shape when viewed from above, and the surface is coated with a fluorine coating agent or the like.

[0030] Upper heater 51 and lower heater 52 are installed in heating chamber 50, sandwiching cooking pan 58. By controlling the on / off of both heaters, the top and bottom surfaces of food 57 in cooking pan 58 can be heated simultaneously or alternately. Upper heater 51 and lower heater 52 are heat sources that utilize radiant heat, such as sheath heaters or electric heaters.

[0031] In this grill chamber 5, a door 6 for closing the front opening of the heating chamber 50 slides back and forth along a pair of door rails 56 provided on the left and right lower sides of the heating chamber 50. This door 6 is wider and taller than the front opening of the heating chamber 50, and the front side of the heating chamber 50 is provided with a flange portion 50a (see FIG. 7) extending in the vertical direction, so that the door 6 and the flange portion 50a are in approximate surface contact with each other, thereby making it possible to airtightly seal the front opening of the heating chamber 50.

[0032] Furthermore, by providing a rubber packing (not shown) on the contact surface between the door 6 and the flange portion 50a, the airtightness of the front opening of the heating chamber 50 can be further improved. The stand 54 on which the cooking pan 58 is placed slides back and forth in conjunction with the sliding of the door 6 using the door rail 56. The door 6 is detachable from the stand 54, and if it becomes dirty it can be removed from the grill chamber 5 and cleaned.

[0033] An exhaust duct 59 is provided above the rear side of the heating chamber 50 to exhaust oily smoke and steam from within the heating chamber 50, and is configured to be exhausted from an exhaust opening H2 provided behind the top plate 2 (see Figure 3). A catalyst 55 for smoke and odor removal is provided inside the exhaust duct 59, which communicates with the exhaust opening H2.

[0034] <Door 6 surroundings configuration> Next, the detailed structure around the door 6 of this embodiment will be described with reference to Figure 6, which is a side cross-sectional view of the grill chamber 5, Figure 7, which is a side cross-sectional view of the cooking device 100 cut along line DD shown in Figure 1, and Figure 8, which is a schematic diagram of the cooking device 100 as seen from above.

[0035] <<Door configuration>> As shown in FIG. 6, the door 6 that closes the opening of the heating chamber 50 is made up of a box body 61 having a space inside, and a handle unit 62 provided above the box body 61.

[0036] The outer casing of the box 61 is formed by a door panel 61a that forms the front of the door 6, a door base 61b that forms the top and bottom surfaces of the box 61, and a frame 61c that forms the back and left and right surfaces of the door 6. The frame 61c that forms the back of the door 6 is provided with a sight window 61d that allows the interior of the heating chamber 50 to be observed when the grill chamber 5 is in use. In this embodiment, the sight window 61d is supported by a partition member 61e, and the gap between the partition member 61e and the frame 61c forms a heat shield 61f.

[0037] The handle unit 62 is a heat-resistant resin member provided at the upper end of the door 6. The handle unit 62 of the present invention has a recess 62a formed behind the door panel 61a (on the heating chamber 50 side) to form a handle portion. In this embodiment, the front end of the handle portion of the handle unit 62 is aligned with the front surface of the door panel 61a. The interior of the handle unit 62 is a cavity 62b, and openings 62c are provided on both ends of the cavity 62b. Each of these will be described in detail below.

[0038] The door panel 61a is a flat member made of glass, for example, and is sandwiched between upper and lower door bases 61b and fixed to a frame 61c.

[0039] The door base 61b is a member made of heat-resistant resin that supports the door panel 61a. In this embodiment, the handle unit 62 is provided above the door base 61b above the door panel 61a, but the upper door base 61b and the handle unit 62 may share a bottom surface, as long as the internal spaces of the box body 61 and the handle unit 62 are partitioned.

[0040] By using a resin material for the handle unit 62 and the door base 61b, the handle portion of the handle unit 62 and the mounting structure of the door panel 61a can be molded into any shape, making it easier to improve the assembly and design of the door 6.

[0041] The frame 61c is formed by bending the top, bottom, left, and right edges of a thin metal plate, into a box shape with a predetermined thickness in the front-to-back direction, with an open front and closed rear and top, bottom, left, and right sides. A hole is molded into the surface of the frame 61c that covers the opening of the heating chamber 50, and a heat-resistant glass observation window 61d is provided to cover the hole. A partition member 61e is provided inside the frame 61c to support the observation window 61d. The partition member 61e placed inside the frame 61c forms two-layer gaps: between the door panel 61a and the partition member 61e, and between the partition member 61e and the frame 61c. Each gap becomes a nearly sealed space, forming a heat-shielding portion 61f with little air flow, suppressing heat transfer.

[0042] By using the door 6, which is composed of the handle unit 62, door panel 61a, door base 61b, frame 61c, and partition member 61e, as described above, the unevenness of the front surfaces of the handle unit 62 and door panel 61a can be minimized, allowing them to be integrated into the design of the kitchen counter.In addition, by having two spaces, one above and one below, in the door 6, it is possible to select cooling means that are appropriate for each part.

[0043] <<Airflow route around door 6>> Next, a configuration for blowing air into the cavity 62b in the handle unit 62 through an air blowing path around the entire periphery of the door 6 will be described.

[0044] 1 and 6, in the cooking device 100 of this embodiment, when the door 6 of the grill chamber 5 is closed, the door panel 61a, the front panel 1a, and the front position of the front end of the handle unit 62 are positioned in a positional relationship such that they are substantially flush with each other. Also, the recessed portion 62a of the handle unit 62 is embedded closer to the heating chamber 50 than the door panel 61a. Furthermore, the cavity 62b in the handle unit 62 is located between the recessed portion 62a and the flange portion 50a of the heating chamber 50, and communicates with openings 62c provided at the left and right ends of the handle unit 62.

[0045] As shown in Figure 7, the front end of ventilation duct 45, located behind front panel 1a on the right side of main body 1, has suction opening 45a aligned with opening 62c at the right end of handle unit 62, so that the air path of ventilation duct 45 communicates with cavity 62b within handle unit 62. Note that opening 62c at the right end of handle unit 62 and suction opening 45a are close to each other, for example, by 2 mm or less when the door is closed, thereby minimizing the amount of air leaking through the gap between them. This is because the ventilation resistance from opening 62c at the left end of handle unit 62, through cavity 62b, to opening 62c at the right end is sufficiently small compared to the pressure loss of air leaking through the gap.

[0046] 8, ventilation duct 45 is connected to intake duct 95 which constitutes the space on the intake side of main fan unit 9, and when main fan unit 9 is driven, air in ventilation duct 45 is also sucked in via intake duct 95. Therefore, the air flow around the door which cools recess 62a of handle unit 62 first enters cavity 62b from opening 62c at the left end of handle unit 62, and the air that has exchanged heat in cavity 62b passes through opening 62c at the right end of handle unit 62, flows through ventilation duct 45 via suction opening 45a, and is sucked into intake duct 95, forming a ventilation path.

[0047] It should be noted that the thermal energy of the air whose temperature rises in cavity 62b as a result of cooling handle unit 62 is minute and is not at a level that would affect the deterioration of the cooling efficiency of substrate 7 and heating coil 3 in main body 1. It should be noted that in this embodiment, opening 62c through which outside air flows into cavity 62b is provided only on the left side surface of handle unit 62, but openings 62c may also be provided on the front or top surface of handle unit 62 as long as they are openings that communicate with cavity 62b. The more openings 62c there are and the wider the opening area, the less ventilation resistance there is to the air flowing through cavity 62b, making it easier for cooling air to flow.

[0048] Furthermore, although the recesses 62a shown in this embodiment have the same shape on the left and right sides of the handle unit 62, they may be configured so that a grip portion is provided only in a part of the handle unit 62, such as only in the central part of the handle unit 62. For example, if the recesses 62a are only in the central part of the handle unit 62, the areas of the left and right openings 62c can be made larger, making it easier for air to enter the cavity 62b.

[0049] In addition, in the embodiment, only the handle portion of the handle unit 62 is cooled, but by connecting the cavity 62b within the handle unit 62 with the space of the box body 61, some of the air may be used to cool the door panel 61a.

[0050] As described above, in this embodiment, low-temperature outside air flows into the recess 62a, which is the main grip portion of the handle unit 62 provided above the door 6, allowing efficient cooling.

[0051] <<Modifications>> Next, a modified example of the first embodiment will be described with reference to Fig. 9. Fig. 9 is a diagram showing a modified example of the cooking device.

[0052] In the modified example shown in FIG. 9, the base plate 7 of the cooking device 100 is disposed to the side of the grill chamber 5. Furthermore, a main fan unit 9 that sends air to the base plate 7 is disposed between the base plate 7 and the front panel 1a. Here, the main fan unit 9 draws air from the bottom surface on the front side of the main body 1, a part of the front panel 1a, or a gap around its periphery, and sends it toward the base plate 7. In other words, by connecting the space on the upstream side (suction side) of the main fan unit 9 with the suction opening 45a, air can be drawn in from the opening 62c (right side) of the handle unit 62, as in FIG. 8. The main fan unit 9 is close to the opening 62c of the handle unit 62, which has the effect of simplifying the structure.

[0053] <Grilling operation> Next, cooling of the handle portion of door 6 during actual grill cooking will be specifically described with reference to Figures 1 to 8. Here, the case where food (not shown) placed on cooking pan 58 of heating chamber 50 is cooked will be described as an example.

[0054] First, the user pulls door 6 forward to open the front opening of heating chamber 50, places cooking pan 58 with food in heating chamber 50, sets the cooking temperature and time using the operation unit (not shown) on front panel 1a, or selects a preset automatic cooking menu, and presses the cook button on the operation unit to begin grill cooking. Then, as cooking begins, upper heater 51 or lower heater 52 is energized, heating the food. Main fan unit 9 also operates to prevent the temperature of the internal components of main body 1 from rising when grill chamber 5 is in use.

[0055] During heating, the wall temperature of the heating chamber 50 rises, and the resulting hot air also raises the temperatures of the flange portion 50a of the heating chamber and the frame 61c of the door 6. Around the door 6, the hot air rises by natural convection, heating the handle unit 62 located at the top end of the door 6. Meanwhile, as the main fan unit 9 is driven, negative pressure is created within the intake duct 95 on the suction side of the impeller 91, creating a flow in which air is drawn in through the intake opening H1 and the ventilation duct 45 connected to the intake duct 95. The ventilation duct 45 is connected to the suction opening 45a at the rear of the front panel 1a and draws air from the cavity 62b of the handle unit 62 through an opening 62c located adjacent to the suction opening 45a. By drawing outside air into the cavity 62b in this way, the recess 62a of the handle unit 62 is cooled. That is, while the grill chamber 5 is in use, the main fan device 9 is driven, so that the air in the cavity 62b of the handle unit 62 can be stably sucked in and cooled continuously.

[0056] In addition, while grilling, the user may perform other cooking on the top plate 2, and in doing so, may work in front of the main body 1 or move left and right in front of the kitchen counter. The door 6 of the grill chamber 5 of the present invention is configured to be nearly flat with few irregularities between the kitchen counter and the front side of the main body, making it less likely to catch on clothing or interfere with cooking operations. In addition, there is less concern about food or other debris flying from the top plate 2 sticking to and staining the handle unit 62.

[0057] As described above, the cooking device of this embodiment can efficiently cool the handle unit 62, has few irregularities on the front side of the main body 1, and provides a system kitchen that is well designed and easy to clean. [Example]

[0058] Next, a cooking device according to a second embodiment will be described with reference to Figures 10 and 11. Note that a duplicated description of points common to the first embodiment will be omitted.

[0059] Fig. 10 is a perspective cross-sectional view of the cooking device 100 of this embodiment when the door is open, and Fig. 11 is a schematic diagram of the cooking device 100 of Fig. 10 as seen from above. The cooking device 100 of this embodiment differs from Example 1 in the air blowing structure using the ventilation duct 45 that communicates with the handle unit 62. That is, in this embodiment, a dedicated door cooling fan 49 is provided on the side of the grill chamber 5 and near the front panel 1a, separate from the main fan unit 9, as air blowing means for blowing air into the cavity 62b in the handle unit 62. This makes it possible to cool the handle unit 62 regardless of the arrangement of the circuit board 7 and main fan unit 9 inside the cooking device 100. In this embodiment, the circuit board 7 is arranged on the side of the grill chamber 5, and the main fan unit 9 is provided behind the circuit board 7. As in the first embodiment, the flow direction within the cavity 62b is preferably such that the door cooling fan 49 sucks air toward the main body 1, but if the cooling performance of the door cooling fan 49 has sufficient capacity, the door cooling fan 49 may be configured to blow outside air into the cavity 62b of the handle unit 62 via the ventilation duct 45.

[0060] This allows the flow rate of air sent to the cavity 62b in the handle unit 62 to be easily determined by selecting the door cooling fan 49 taking into account the fan characteristics. Furthermore, since the outer shape of the cooling fan can be selected to match the cross section of the air passage of the ventilation duct, the ventilation resistance of the ventilation duct 45 can be reduced, allowing for efficient airflow. Furthermore, since the main fan unit 9 and the door cooling fan 49 can be controlled separately, it is possible to suppress abnormal noise and other noises that occur when the air flow passing through the cavity 62b is excessive. Furthermore, when the handle unit 62 is configured using the main fan unit 9 as in the first embodiment, it is also possible to reduce heat leakage (energy loss) from the heating chamber 50 due to excessive cooling of the handle unit 62. [Example]

[0061] Next, a cooking device according to a third embodiment will be described with reference to Figures 12 and 13. Note that a duplicated description of points common to the above-mentioned embodiments will be omitted.

[0062] FIG. 12 is a perspective view of the cooking device of this embodiment when the door is open, and FIG. 13 is a schematic side cross-sectional view of the grill chamber 5. The opening structure of the door 6 and the structure of the box body 61 of the door 6 are different from those of the first embodiment.

[0063] That is, in this embodiment, the cooling structure of the present invention is applied to a structure in which the door 6 opens vertically. Because the present invention is a ventilation path when the door 6 is closed, it is applicable regardless of how the door 6 is opened. Furthermore, in this embodiment, a unique cooling structure is also provided in the box 61. That is, the handle unit 62 is configured such that cooling air flows into the cavity 62b through the opening 62c of the handle unit 62 by a cooling means (main fan unit 9 or door cooling fan 49) provided behind the front panel 1a, as in the first and second embodiments. Furthermore, the box 61 is provided with an exhaust port 61g in the frame 61c, which forms its side surface, and an intake port 61h in the lower door base 61b, which forms its bottom surface. This configuration utilizes the rising air currents generated inside the box 61 to flow cooling air and reduce the temperature of the door panel 61a.

[0064] This reduces the temperature of the handle unit 62 and the door panel 61a, thereby allowing the entire door to be cooled efficiently. [Example]

[0065] Next, a cooking device according to a fourth embodiment will be described with reference to Fig. 14. Note that a duplicated description of points common to the above-mentioned embodiments will be omitted.

[0066] 14 is a schematic diagram of a side cross section of the grill chamber 5 of this embodiment, which differs from embodiment 1 in that the door cooling fan 49 that sends air into the cavity 62b in the handle unit 62 is disposed inside the box body 61 of the door 6. That is, in this embodiment, the cavity 62b of the handle unit 62 and the space of the box body 61 are connected, and part of the box body 61 is used as a ventilation duct 45b to send air from the door cooling fan 49 installed in the box body 61 into the cavity 62b.

[0067] This allows the entire door 6 to be cooled efficiently all at once, regardless of the arrangement of the circuit board 7 and main fan unit 9 inside the main body. In Fig. 14, the intake port 61h of the door cooling fan 49 is provided in the lower door base 61b, and the cavity 62b of the handle unit 62 is located at the most downstream side. In order to cool the grip portion of the handle unit 62 more efficiently, the cooling fan may be arranged to draw in outside air through the opening 62c of the handle unit 62 and exhaust it from an opening provided in the same position as the intake port 61h in Fig. 14.

[0068] The present invention is not limited to the above-described embodiments, but includes various modifications. The above-described embodiments have been described in detail to clearly explain the present invention, and are not necessarily limited to those including all of the described configurations. Furthermore, it is possible to replace part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Furthermore, it is possible to add, delete, or replace other configurations with respect to the configuration of each embodiment. [Explanation of symbols]

[0069] 100...heating cooker, 1...main body, 1a...front panel, 2...top plate, 3...heating coil, 4...board cover, 5...grill chamber, 50...heating chamber, 50a...flange portion, 51...upper heater, 52...lower heater, 54...base, 55...catalyst, 56...door rail, 58...cooking pan, 59...exhaust duct, 6...door, 61...box body, 61a...door panel, 61b...door base, 61c...frame, 61d...sight window, 61e...partition member, 61f...heat shield portion, 61g...exhaust port, 61h...intake port, 62...handle unit, 62a...recess, 62b...cavity, 62c...opening, 7...board, 9...main fan unit, 91...impeller, 95...intake duct, 45, 45b...ventilation duct, 45a...suction opening,

Claims

1. A cooking appliance comprising: a pot holder disposed on the top surface of a main body; a grill chamber disposed below the pot holder and in front of the main body; a control board; and a main fan device for cooling the control board. The grill chamber has a heating chamber having an opening on the front surface, a heating means for heating the inside of the heating chamber, and a door for covering the opening, The door has a box body that covers the opening and a handle unit that is disposed above the box body, the handle unit has a grip portion formed by recessing a part of a front surface toward the heating chamber, and a cavity disposed closer to the heating chamber than the grip portion and having a plurality of openings in a wall surface; A cooking device characterized in that a ventilation duct communicating with one of the plurality of openings is provided on a side of the grill chamber.

2. The cooking device according to claim 1, A cooking device characterized in that the front end of the handle portion is positioned in a positional relationship that is approximately flush with the front surface of the box body.

3. The cooking device according to claim 1, A cooking device characterized in that one of the plurality of openings is provided on the front or top surface of the handle unit.

4. The cooking device according to claim 1, the opening communicating with the ventilation duct is an opening provided on a side surface of the handle unit, The cooking appliance is characterized in that the ventilation duct draws air from the cavity using the main fan device arranged on the rear side of the main body.

5. The cooking device according to claim 1, the opening communicating with the ventilation duct is an opening provided on a side surface of the handle unit, The cooking appliance is characterized in that the ventilation duct draws air from the cavity by the main fan device disposed on the front side of the main body.

6. The cooking device according to claim 1, the opening communicating with the ventilation duct is an opening provided on a side surface of the handle unit, The cooking appliance is characterized in that the ventilation duct draws air from the cavity using a door cooling fan disposed on the front side of the main body.

7. The cooking device according to any one of claims 1 to 6, The cooking device is characterized in that the box body has a cavity inside and a plurality of openings on its outer casing.

8. A cooking appliance comprising: a pot holder disposed on the top surface of a main body; a grill chamber disposed below the pot holder and in front of the main body; a control board; and a main fan device for cooling the control board. The grill chamber has a heating chamber having an opening on the front surface, a heating means for heating the inside of the heating chamber, and a door for covering the opening, The door has a box body that covers the opening and a handle unit that is disposed above the box body, the handle unit has a grip portion formed by recessing a part of a front surface toward the heating chamber, and a cavity disposed closer to the heating chamber than the grip portion and having a plurality of openings in a wall surface; A cooking device characterized in that a ventilation duct communicating with an opening on the box side among the plurality of openings, and a door cooling fan supplying outside air to the ventilation duct are arranged inside the box.

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