Heating cooker

Abstract

A heating cooker includes a main body, a fan, a detection unit, and a first guide portion. The main body has a suction port. The fan generates airflow. The detection unit is disposed below the suction port of the main body and a suction port of the fan and detects opening and closing of a door. The first guide portion guides airflow from the suction port of the main body to the detection unit.

Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims priority from Japanese Application JP2024-013046, the content to which is hereby incorporated by reference into this application.BACKGROUND OF THE DISCLOSURE1. Technical Field

[0002] The present disclosure relates to a heating cooker.2. Description of the Related Art

[0003] JP 2020-112292 A discloses a heating cooker. The heating cooker disclosed in JP 2020-112292 A includes a heating chamber, a door, a magnetron, and a cooling fan. The heating chamber accommodates an object to be heated. The magnetron is disposed below the heating chamber. The cooling fan is disposed below the heating chamber and is provided in front of the magnetron. The cooling fan blows air toward the magnetron.SUMMARY OF THE DISCLOSURE

[0004] However, in the heating cooker, a detection unit that detects opening and closing of the door is disposed on a side wall of the heating chamber, and the cooling fan is disposed below the heating chamber. For this reason, the detection unit has not been sufficiently cooled in some cases.

[0005] In view of the above problem, an object of the present disclosure is to provide a heating cooker capable of cooling a detection unit efficiently.

[0006] According to one aspect of the present disclosure, the heating cooker includes a main body, a fan, a detection unit, and a first guide portion. The main body has a suction port. The fan is configured to generate airflow. The detection unit is disposed below the suction port of the main body and a suction port of the fan, and is configured to detect opening and closing of a door. The first guide portion is configured to guide the airflow from the suction port of the main body to the detection unit.

[0007] According to the heating cooker of the present disclosure, the detection unit can be efficiently cooled.BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 is a perspective view illustrating a heating cooker according to an embodiment of the present disclosure;

[0009] FIG. 2 is a perspective view illustrating the heating cooker in a state where a housing is removed according to the present embodiment;

[0010] FIG. 3 is a perspective view illustrating the heating cooker in a state where the housing is removed according to the present embodiment;

[0011] FIG. 4 is a perspective view illustrating a door according to the present embodiment;

[0012] FIG. 5 is a perspective view illustrating the heating cooker in a state where the housing is removed according to the present embodiment;

[0013] FIG. 6 is a view illustrating a schematic cross section of the heating cooker according to the present embodiment;

[0014] FIG. 7 is a view illustrating a schematic cross section of an air blowing unit according to the present embodiment;

[0015] FIG. 8 is a perspective view illustrating the heating cooker in a state where the housing is removed according to the present embodiment;

[0016] FIG. 9 is a view illustrating a schematic cross section of the air blowing unit according to the present embodiment; and

[0017] FIG. 10 is a block diagram illustrating a configuration of the heating cooker according to the present embodiment.DETAILED DESCRIPTION

[0018] Hereinafter, with reference to the drawings, an embodiment of a heating cooker according to the present disclosure will be described. Note that, in the drawings, the same or corresponding portions are denoted by the same reference numerals, and description of these will not be repeated.

[0019] With reference to FIG. 1, a heating cooker 100 according to the present embodiment will be described. FIG. 1 is a perspective view illustrating the heating cooker 100. Further, FIG. 1 illustrates the external appearance of the heating cooker 100 when viewed diagonally from the upper right front. As illustrated in FIG. 1, the heating cooker 100 heats and cooks an object to be heated. The object to be heated is, for example, a food item. The heating cooker 100 includes a housing 10, a door 20, and an operation panel 30. The housing 10 is an example of a part of a “main body”.

[0020] The operation panel 30 is a substantially rectangular plate-shaped member. The operation panel 30 receives operation from the user. The operation includes, for example, a cooking method for heating and cooking an object to be heated. Specifically, the operation panel 30 includes a display unit. The display unit displays various types of information. Specifically, the display unit includes a liquid crystal panel.

[0021] In the present embodiment, a side of the heating cooker 100 on which the operation panel 30 is disposed is defined as a front side of the heating cooker 100, and a side (back surface side) opposite to the front side is defined as a rear side of the heating cooker 100. Further, when the heating cooker 100 is viewed from the front side, a right side is defined as a right side of the heating cooker 100, and a side opposite to the right side is defined as a left side of the heating cooker 100. Further, in a direction orthogonal to a front-rear direction and a left-right direction of the heating cooker 100, a side on which the operation panel 30 is disposed is defined as an upper side of the heating cooker 100, and a side (bottom side) opposite to the upper side is defined as a lower side of the heating cooker 100. Note that, these directions are not intended to limit directions when the heating cooker 100 of the present disclosure is used. In the present embodiment, a first direction D1 is an upward direction. A second direction D2 is a forward direction. A third direction D3 is a left direction.

[0022] The housing 10 is a box-shaped member. Specifically, the housing 10 has a right outer wall 11, a left outer wall 12, an upper outer wall 13, a lower outer wall 14, and a rear outer wall 15. The rear outer wall 15 intersects the second direction D2. The right outer wall 11 and the left outer wall 12 face each other in the third direction D3. The upper outer wall 13 and the lower outer wall 14 face each other in the first direction D1.

[0023] Next, a heating and cooking chamber 50 will be described with reference to FIGS. 1 to 3. FIGS. 2 and 3 are perspective views illustrating the heating cooker 100 from which the housing 10 is removed. FIG. 2 illustrates the external appearance of the heating cooker 100 when viewed diagonally from the upper right front. FIG. 3 illustrates the external appearance of the heating cooker 100 when viewed diagonally from the lower right front. As illustrated in FIGS. 1 to 3, the heating cooker 100 further includes the heating and cooking chamber 50 and a front wall 60. The front wall 60 is an example of a portion of a “main body”.

[0024] The heating and cooking chamber 50 is accommodated in the housing 10. The heating and cooking chamber 50 accommodates an object to be heated. The heating and cooking chamber 50 has, for example, a substantially rectangular parallelepiped shape. Specifically, the heating and cooking chamber 50 has a right wall 51, a left wall 52, an upper wall 53, a lower wall 54, and a rear wall 55. The rear wall 55 intersects the second direction D2. The right wall 51 and the left wall 52 face each other in the third direction D3. The upper wall 53 and the lower wall 54 face each other in the first direction D1. A material of each of the right wall 51, the left wall 52, the upper wall 53, the lower wall 54, and the rear wall 55 is, for example, metal.

[0025] Note that a dish-shaped member may be accommodated in the heating and cooking chamber 50. On the dish-shaped member, an object to be heated can be placed. To be specific, the dish-shaped member is rotatable about a rotation axis along the first direction D1.

[0026] The heating cooker 100 further includes a first space R1, a second space R2, a third space R3, a fourth space R4, and a fifth space R5. The first space R1 is disposed between the upper outer wall 13 and the upper wall 53. The second space R2 is disposed between the lower outer wall 14 and the lower wall 54. The third space R3 is disposed between the rear outer wall 15 and the rear wall 55. The fourth space R4 is disposed between the right outer wall 11 and the right wall 51. The fifth space R5 is disposed between the left outer wall 12 and the left wall 52.

[0027] The front wall 60 is a plate-shaped member having a quadrangular ring shape. The front wall 60 faces the rear wall 55. Further, the front wall 60 faces the rear outer wall 15. The front wall 60 has an opening 61, a plurality of through-hole portions 62, a first through-hole 63, and a second through-hole 64. Each of a plurality of the through hole portions 62 is an example of a “suction port”. The opening 61 allows the inside and the outside of the heating and cooking chamber 50 to communicate with each other.

[0028] A plurality of the through-hole portions 62 are positioned above the opening 61. Each of a plurality of the through-hole portions 62 allows the inside and the outside of the first space R1 to communicate with each other. A plurality of the through-hole portions 62 form seven columns. In each of the seven columns of the through-hole portions 62, three through-holes are arranged in a column in an up-down direction.

[0029] The first through-hole 63 is formed at a position to the left side of the opening 61. The second through-hole 64 is formed at a position to the right side of the opening 61.

[0030] Next, the door 20 will be described with reference to FIGS. 1 to 4. FIG. 4 is a perspective view illustrating the door 20. As illustrated in FIGS. 1 to 4, the door 20 includes a substantially rectangular plate-shaped member 21 and a rotary shaft unit 22.

[0031] The rotary shaft unit 22 is positioned below the plate-shaped member 21. The plate-shaped member 21 opens and closes the opening 61. Specifically, the plate-shaped member 21 rotates about a rotation axis in the third direction D3. The plate-shaped member 21 opens the opening 61 in a state of being orthogonal to the first direction D1. On the other hand, the plate-shaped member 21 closes the opening 61 in a state of being orthogonal to the second direction D2.

[0032] To be specific, the door 20 includes a first connection member 23 and a second connection member 24. Both the first connection member 23 and the second connection member 24 connect the heating and cooking chamber 50 and the door 20 when the door 20 is positioned at a closed position.

[0033] The first connection member 23 and the second connection member 24 are attached to the plate-shaped member 21. The first connection member 23 and the second connection member 24 face each other in the left-right direction. The first connection member 23 is attached to a left edge portion of a rear surface of the plate-shaped member 21. The second connection member 24 is attached to a right edge portion of the rear surface of the plate-shaped member 21.

[0034] For example, each of the first connection member 23 and the second connection member 24 has a hook member. The hook member is a plate-shaped member in which a longitudinal direction is in the front-rear direction. The hook member includes a claw portion and a rotation pin portion. The rotation pin portion is positioned at one end portion of the hook member. The rotation pin portion rotates about a rotation axis extending along the third direction D3. On the other hand, the claw portion has a projecting portion projecting downward. The claw portion is positioned at another end portion of the hook member. As a result, the claw portion is rotatable around the rotation pin portion.

[0035] Furthermore, a first detection unit 430 and a second detection unit 440 will be described with reference to FIGS. 1 to 5. FIG. 5 is a perspective view illustrating the heating cooker 100. To be specific, FIG. 5 illustrates the external appearance of the heating cooker 100 when viewed diagonally from the upper left rear. As illustrated in FIGS. 1 to 5, the heating cooker 100 includes the first detection unit 430 and the second detection unit 440.

[0036] The first detection unit 430 and the second detection unit 440 are attached to the heating and cooking chamber 50. The first detection unit 430 is attached to the left wall 52 of the heating and cooking chamber 50. To be specific, the first detection unit 430 is attached to a rear side of the first through-hole 63. The first detection unit 430 is disposed below a plurality of the through-hole portions 62. Further, the second detection unit 440 is attached to the right wall 51 of the heating and cooking chamber 50. To be specific, the second detection unit 440 is attached to a rear side of the second through-hole 64. The second detection unit 440 is disposed below a plurality of the through-hole portions 62.

[0037] The first detection unit 430 detects opening and closing of the door 20. Specifically, the first detection unit 430 has a hole portion and two sensors. A shape of the hole portion corresponds to a shape of the claw portion of the first connection member 23. The two sensors output a first detection signal when the claw portion of the first connection member 23 is positioned in the hole portion. On the other hand, the two sensors do not output the first detection signal when the claw portion is not positioned in the hole portion.

[0038] The second detection unit 440 detects opening and closing of the door 20. Specifically, the second detection unit 440 has a hole portion and two sensors. A shape of the hole portion corresponds to a shape of the claw portion of the second connection member 24. The two sensors output a second detection signal when the claw portion of the second connection member 24 is positioned in the hole portion. On the other hand, the two sensors do not output the second detection signal when the claw portion is not positioned in the hole portion.

[0039] Next, the heating cooker 100 will be further described with reference to FIGS. 2 to 8. FIG. 6 is a view illustrating a schematic cross section of the heating cooker 100. To be specific, FIG. 6 is a cross-sectional view illustrating the heating cooker 100 cut along a plane orthogonal to the third direction D3. FIG. 7 is a view illustrating a schematic cross section of an air blowing unit 140 according to the present embodiment. FIG. 8 is a perspective view illustrating the heating cooker 100. To be specific, FIG. 8 illustrates the external appearance of the heating cooker 100 when viewed diagonally from the upper right rear.

[0040] As illustrated in FIGS. 2 to 8, the heating cooker 100 includes a microwave supply unit 110, a first heater unit 120, a second heater unit 130, and the air blowing unit 140. Each of the microwave supply unit 110, the first heater unit 120, the second heater unit 130, and the air blowing unit 140 heats an object to be heated.

[0041] First, the microwave supply unit 110 will be described. The microwave supply unit 110 supplies microwaves into the heating and cooking chamber 50.

[0042] The microwave supply unit 110 is disposed on the upper wall 53 of the heating and cooking chamber 50. Specifically, the microwave supply unit 110 is positioned above the heating and cooking chamber 50 with the upper wall 53 interposed between them. The microwave supply unit 110 includes a partition member 111, a radiation chamber, a magnetron 113, and a waveguide 114.

[0043] The magnetron 113 is disposed closer to the front wall 60 than the first heater unit 120. The magnetron 113 generates microwaves. The waveguide 114 propagates microwaves generated by the magnetron to the radiation chamber, and supplies microwaves to the inside of the heating and cooking chamber 50.

[0044] The partition member 111 is disposed between the radiation chamber and the upper wall 53 of the heating and cooking chamber 50. A material of the partition member 111 is, for example, non-metal, and includes ceramics or mica. As a result, since a material of the partition member 111 contains ceramics or mica, the partition member 111 transmits microwaves. On the other hand, materials of the radiation chamber and the waveguide 114 include metal.

[0045] The heating and cooking chamber 50 further includes an intake hole portion 81, an exhaust hole portion 82, an intake damper unit 83, and an exhaust damper unit 84. The intake hole portion 81 is an example of an “open hole”. The intake damper unit 83 is an example of a “damper unit”.

[0046] The intake hole portion 81 allows the inside and the outside of the heating and cooking chamber 50 to communicate with each other. Specifically, the intake hole portion 81 is disposed on the left wall 52. The intake hole portion 81 has, for example, a quadrangular shape. Specifically, the intake hole portion 81 is, for example, a group of a plurality of punched holes. The punched hole has, for example, a circular shape. A diameter of the punched hole of the intake hole portion 81 is, for example, 3.4 mm in order to prevent microwaves from leaking.

[0047] The intake damper unit 83 opens and closes the intake hole portion 81. The intake damper unit 83 is attached to an outer side of the left wall 52. For example, in a case where the intake damper unit 83 opens the intake hole portion 81, the inside and the outside of the heating and cooking chamber 50 communicate with each other. As a result, air is guided to the intake hole portion 81. On the other hand, in a case where the intake damper unit 83 closes the intake hole portion 81, the inside and the outside of the heating and cooking chamber 50 do not communicate with each other. As a result, air is not guided to the intake hole portion 81. For example, the intake damper unit 83 includes a motor, a member driven by the motor, and a damper opening and closing detection switch.

[0048] Further, the exhaust hole portion 82 allows the inside and the outside of the heating and cooking chamber 50 to communicate with each other. Specifically, the exhaust hole portion 82 is disposed on the right wall 51. The exhaust hole portion 82 has, for example, a quadrangular shape. Specifically, the exhaust hole portion 82 is, for example, a group of a plurality of punched holes. The punched hole has, for example, a circular shape. A diameter of the punched hole of the exhaust hole portion 82 is, for example, 3.4 mm in order to prevent microwaves from leaking.

[0049] The exhaust damper unit 84 opens and closes the exhaust hole portion 82. The exhaust damper unit 84 is attached to an outer side of the right wall 51. For example, in a case where the exhaust damper unit 84 opens the exhaust hole portion 82, the inside and the outside of the heating and cooking chamber 50 communicate with each other. On the other hand, in a case where the exhaust damper unit 84 closes the exhaust hole portion 82, the inside and the outside of the heating and cooking chamber 50 do not communicate with each other. For example, the exhaust damper unit 84 includes a motor, a member driven by the motor, and a damper opening and closing detection switch.

[0050] Next, flow of air will be described in detail. First, the intake damper unit 83 opens the intake hole portion 81, and the exhaust damper unit 84 opens the exhaust hole portion 82. As a result, air is guided to the intake hole portion 81. Air is blown into the heating and cooking chamber 50 through the intake hole portion 81. The air blown from the intake hole portion 81 into the heating and cooking chamber 50 moves in a direction opposite to the third direction D3. After that, air is discharged from the exhaust hole portion 82 to the outside of the heating and cooking chamber 50.

[0051] Next, the first heater unit 120 will be described. The first heater unit 120 is disposed on the upper wall 53 of the heating and cooking chamber 50. The first heater unit 120 includes a first heater 121 and a cover portion 122. The first heater 121 is, for example, a carbon heater. The first heater 121 that is energized generates heat. As a result, since temperature rises quickly, an object to be heated can be cooked in short time. The cover portion 122 covers an upper side, a front side, and a rear side of the first heater 121. Specifically, the cover portion 122 includes a heat reflection plate 122a and a heat shielding plate 122b. The heat reflection plate 122a covers an upper side, a front side, and a rear side of the first heater 121. The heat shielding plate 122b covers an upper side, a front side, and a rear side of the heat reflection plate 122a. An air layer 122c is provided between the heat reflection plate 122a and the heat shielding plate 122b. As a result, heat of the first heater 121 can be prevented from being transferred to the first space R1. Therefore, output of the first heater 121 can be increased, and cooking time can be shortened. Here, airflow may flow through the air layer 122c, or a heat insulating material may be used instead of the air layer 122c. As a result, it is possible to further prevent heat of the first heater 121 from being transferred to the first space R1. Further, a second heat shielding plate may be provided between the heat reflection plate 122a and the heat shielding plate 122b, an air layer may be provided between the heat reflection plate 122a and the second heat shielding plate, and a heat insulating material may be provided between the second heat shielding plate and the heat shielding plate 122b. In this manner, it is possible to further prevent heat of the first heater 121 from being transferred to the first space R1. Note that a terminal portion of the first heater 121 may be disposed outside the heat shielding plate 122b. As a result, influence of hot air on the terminal portion of the first heater 121 can be suppressed. Therefore, output of the first heater 121 can be increased, and cooking time can be shortened.

[0052] Next, the second heater unit 130 will be described. The second heater unit 130 is disposed on the lower wall 54 of the heating and cooking chamber 50. The second heater unit 130 includes a second heater 131 and a second heater case 132. The second heater 131 is, for example, a nichrome wire. The second heater 131 that is energized generates heat. Output of the second heater 131 is lower than output of the first heater 121. The second heater case 132 covers a lower side, a front side, and a rear side of the second heater 131. A material of the second heater case 132 includes metal. The second heater 131 that is energized generates heat.

[0053] Next, the air blowing unit 140 will be described. The air blowing unit 140 supplies hot air into the heating and cooking chamber 50. The air blowing unit 140 is disposed on the rear wall 55. Specifically, the air blowing unit 140 is positioned behind the heating and cooking chamber 50 with the rear wall 55 interposed between them.

[0054] Specifically, the air blowing unit 140 includes an air blowing chamber 141, a third heater 142, a centrifugal fan 143, a drive unit 144, a partition member 145, and a heat shield plate 146. The air blowing chamber 141 is, for example, a box-shaped member made from metal. The centrifugal fan 143 has a plurality of blades.

[0055] The third heater 142 and the centrifugal fan 143 are accommodated in the air blowing chamber 141. The third heater 142 heats air inside the air blowing chamber 141 to generate hot air. Specifically, the third heater 142 has an annular shape when viewed from the front side toward the rear side. Then, the third heater 142 is disposed along an outer circumference of the centrifugal fan 143.

[0056] The rear wall 55 has a suction hole portion and a blow-out hole portion. To be specific, the suction hole portion is, for example, a group of a plurality of punched holes. Similarly, the blow-out hole portion is also, for example, a group of a plurality of punched holes. The punched hole has, for example, a circular shape. A diameter of the punched hole of each of the suction hole portion and the blow-out hole portion is, for example, 3.4 mm in order to prevent microwaves from leaking.

[0057] The partition member 145 is, for example, a plate-shaped member made from metal. The partition member 145 has, for example, a rectangular shape when viewed from the front side toward the rear side. The partition member 145 is disposed on substantially the entire surface of the rear wall 55. Specifically, the partition member 145 is positioned on the outer side of the rear wall 55.

[0058] The heat shield plate 146 is, for example, a plate-shaped member made from metal. The heat shield plate 146 is, for example, a plate-shaped member having a quadrangular ring shape when viewed from the front side toward the rear side. The heat shield plate 146 is positioned on the outer side of the partition member 145.

[0059] The drive unit 144 is positioned on the outer side of the air blowing chamber 141. Specifically, the drive unit 144 is positioned on the outer side of the heat shield plate 146, and a shaft portion of the drive unit 144 penetrates the partition member 145 and the heat shield plate 146 and is connected to the centrifugal fan 143. The drive unit 144 drives the centrifugal fan 143. The drive unit 144 includes, for example, a motor.

[0060] The air blowing unit 140 draws in hot air in the heating and cooking chamber 50 through a suction hole portion, and blows hot air into the heating and cooking chamber 50 through a blow-out hole portion. To be more specific, the air blowing unit 140 draws in hot air from a central portion inside the heating and cooking chamber 50 and blows hot air to a peripheral edge portion inside the heating and cooking chamber 50. As a result, the inside of the heating and cooking chamber 50 can be entirely heated by driving the air blowing unit 140.

[0061] Next, a first fan 210, a left first guide portion 501, and a left second guide portion 520 will be further described with reference to FIGS. 5 to 9. FIG. 9 is a view illustrating a schematic cross section of the heating cooker 100. To be specific, FIG. 9 is a cross-sectional view illustrating the heating cooker 100 cut along a plane orthogonal to the third direction D3. As illustrated in FIGS. 5 to 9, the heating cooker 100 further includes the first fan 210, the left first guide portion 501, and the left second guide portion 520.

[0062] For example, the first fan 210 is a Sirocco fan. The first fan 210 is disposed on the upper wall 53 of the heating and cooking chamber 50. Further, the first fan 210 is disposed between the rear wall 55 of the heating and cooking chamber 50 and the rear outer wall 15 of the housing 10. Specifically, the first fan 210 is disposed in a region in which the first space R1 and the third space R3 overlap each other.

[0063] To be specific, the first fan 210 is positioned at the same height as a plurality of the through-hole portions 62. The first fan 210 is disposed above the first detection unit 430. In other words, the first detection unit 430 is disposed below a suction port of the first fan 210. The first fan 210 takes in air outside the heating cooker 100. Further, the first fan 210 discharges air into the third space R3.

[0064] The left first guide portion 501 guides airflow from a plurality of the through-hole portions 62 to the first detection unit 430. The left first guide portion 501 is disposed on the left wall 52. The left first guide portion 501 is a wall body. The left first guide portion 501 is erected on the left wall 52. The left first guide portion 501 extends from above the through-hole portion 62 on the left side among a plurality of the through-hole portions 62 toward the rear of the first detection unit 430, and then extends downward.

[0065] The left second guide portion 520 guides airflow from the first detection unit 430 to the intake damper unit 83. The left second guide portion 520 is disposed on the left wall 52. Specifically, the left second guide portion 520 includes an upper wall body 521 and a lower wall body 522. The left second guide portion 520 is erected on the left wall 52. The upper wall body 521 extends toward the front of the intake damper unit 83 from a lower end portion of the left first guide portion 501 and then extends toward the upper wall 53. The lower wall body 522 passes below the first detection unit 430 and behind the intake damper unit 83 from the front wall 60, and then extends toward the upper wall 53. As a result, an inlet 520b of the left second guide portion 520 is provided below the first detection unit 430. Further, an outlet 520a of the left second guide portion 520 is provided above the intake damper unit 83. Furthermore, the outlet 520a of the left second guide portion 520 is provided below a plurality of the through-hole portions 62. Then, the outlet 520a of the left second guide portion 520 opens in a direction opposite to the second direction D2.

[0066] Here, flow of air generated by driving of the first fan 210 will be described. When driven, the first fan 210 takes air from the outside of the heating cooker 100 into a space between the housing 10 and the heating and cooking chamber 50 through a plurality of the through-hole portions 62. Airflow introduced between the housing 10 and the heating and cooking chamber 50 is directed to the first detection unit 430 by the left first guide portion 501. At this time, the airflow cools the first detection unit 430. The airflow that cools the first detection unit 430 enters the inlet 520b of the left second guide portion 520, flows in a direction opposite to the second direction D2, and then flows toward the intake damper unit 83. At this time, the airflow cools the intake damper unit 83. Specifically, the airflow cools a motor of the intake damper unit 83 and a damper opening and closing detection switch. In other words, the first fan 210 generates an airflow EF flowing through the first detection unit 430 and the intake damper unit 83 in this order. Specifically, the first fan 210 generates the airflow EF flowing through the first detection unit 430, the inlet 520b of the left second guide portion 520, the intake damper part 83, and the outlet 520a of the left second guide portion 520 in this order.

[0067] Further, when driven, the first fan 210 generates a blown airflow BF1. The blown airflow BF1 is blown downward. The blown airflow BF1 circulates downward in the third space R3 between the air blowing unit 140 and the rear outer wall 15. At this time, the blown airflow BF1 cools the drive unit 144 of the air blowing unit 140.

[0068] As described above with reference to FIGS. 1 to 9, according to the heating cooker 100, the left first guide portion 501 guides the airflow EF to the first detection unit 430, so that the first detection unit 430 disposed below a suction port of the first fan 210 and the through-hole portion 62 can be efficiently cooled. By the above, it is not necessary to add an auxiliary fan for cooling the first detection unit 430, and it is possible to suppress increase in size of the heating cooker 100.

[0069] Then, the left second guide portion 520 guides the airflow EF to the intake damper unit 83, so that the intake damper unit 83 can be efficiently cooled. Since the inlet 520b of the left second guide portion 520 is provided below the first detection unit 430, the first detection unit 430 and the intake damper 83 can be efficiently cooled in this order. Since the outlet 520a of the left second guide portion 520 is provided above the intake damper unit 83, the first fan 210 generates the airflow EF flowing through the first detection unit 430 and the intake damper unit 83 in this order. Furthermore, since the outlet 520a of the left second guide portion 520 is provided below the through-hole portion 62, it can be prevented from causing resistance to an airflow flowing through the first space R1. Further, since the outlet 520a of the left second guide portion 520 opens in a direction opposite to the second direction D2, it is possible to suppress inflow of an airflow flowing through the first space R1.

[0070] Next, a second fan 220 will be described with reference to FIGS. 5 to 9. As illustrated in FIGS. 5 to 9, the heating cooker 100 further includes the second fan 220, a right first guide portion 601, and a right second guide portion 620.

[0071] For example, the second fan 220 is a Sirocco fan. The first fan 210 and the second fan 220 are arranged side by side in the left-right direction. The second fan 220 is disposed on the upper wall 53 of the heating and cooking chamber 50. Further, the second fan 220 is disposed between the rear wall 55 of the heating and cooking chamber 50 and the rear outer wall 15 of the housing 10. Specifically, the second fan 220 is disposed in the region in which the first space R1 and the third space R3 overlap each other.

[0072] To be specific, the second fan 220 is positioned at the same height as a plurality of the through-hole portions 62. The second fan 220 is disposed above the second detection unit 440. In other words, the second detection unit 440 is disposed below a suction port of the second fan 220. The second fan 220 generates an airflow between the upper wall 53 of the heating and cooking chamber 50 and the upper outer wall 13 of the housing 10. The second fan 220 takes in air outside the heating cooker 100. Further, the second fan 220 discharges air into the third space R3.

[0073] The right first guide portion 601 guides an airflow from a plurality of the through-hole portions 62 to the second detection unit 440. The right first guide portion 601 is disposed on the right wall 51. Note that the right first guide portion 601 has a similar configuration to the left first guide portion 501.

[0074] The right second guide portion 620 guides an airflow from the second detection unit 440 to the exhaust damper unit 84. The right second guide portion 620 is disposed on the right wall 51. The right second guide portion 620 has a similar configuration to the left second guide portion 520.

[0075] Here, flow of air generated by driving of the second fan 220 will be described. When driven, the second fan 220 takes air from the outside of the heating cooker 100 into a space between the housing 10 and the heating and cooking chamber 50 through a plurality of the through-hole portions 62. Airflow introduced between the housing 10 and the heating and cooking chamber 50 is directed to the second detection unit 440 by the right first guide portion 601. At this time, the airflow cools the second detection unit 440. The airflow that cools the second detection unit 440 enters an inlet of the right second guide portion 620, flows in a direction opposite to the second direction D2, and then flows toward the exhaust damper unit 84. At this time, the airflow cools the exhaust damper unit 84. Specifically, the airflow cools a motor of the exhaust damper unit 84 and a damper opening and closing detection switch. In other words, the second fan 220 generates an airflow flowing through the second detection unit 440 and the exhaust damper unit 84 in this order.

[0076] When driven, the second fan 220 generates a blown airflow DF1. The blown airflow DF1 is blown downward. The blown airflow DF1 circulates downward in the third space R3 between the air blowing unit 140 and the rear outer wall 15. At this time, the blown airflow BF1 cools the drive unit 144 of the air blowing unit 140.

[0077] As described above, according to the heating cooker 100, the right first guide portion 601 guides an airflow to the second detection unit 440, so that the second detection unit 440 disposed below a suction port of the second fan 220 and the through-hole portion 62 can be efficiently cooled. Then, the right second guide portion 620 guides an airflow to the exhaust damper unit 84, so that the exhaust damper unit 84 can be efficiently cooled. By the above, it is not necessary to add an auxiliary fan for cooling the first detection unit 430, and it is possible to suppress increase in size of the heating cooker 100.

[0078] Next, with reference to FIG. 10, a control board 300 will be described. FIG. 10 is a block diagram illustrating a configuration of the heating cooker 100. As illustrated in FIGS. 5 to 10, the heating cooker 100 further includes the control board 300.

[0079] The control board 300 includes a storage unit 310 and a control unit 320. The storage unit 310 includes a random access memory (RAM) and a read only memory (ROM). The storage unit 310 stores a control program for controlling operation of each part of the heating cooker 100.

[0080] The control unit 320 is a hardware circuit including a processor such as a central processing unit (CPU). The control unit 320 executes a control program stored in the storage unit 310.

[0081] In the present embodiment, the heating cooker 100 has, as heating and cooking modes, a “microwave heating mode”, a “hot air circulation heating mode”, and a “grill heating mode”. The “microwave heating mode” is a mode for heating and cooking an object to be heated mainly by radiating microwaves into the heating and cooking chamber 50. The “grill heating mode” is a mode for heating and cooking an object to be heated mainly by causing heat generated from the first heater unit 120 and the second heater unit 130 to radiate to an object to be heated. The “hot air circulation heating mode” is a mode for heating and cooking an object to be heated mainly by circulating hot air in the inside of the heating and cooking chamber 50 entirely to achieve uniform temperature in the heating and cooking chamber 50.

[0082] A first detection signal and a second detection signal are input to the control unit 320. Specifically, when the door 20 is positioned at a closed position, the first detection signal and the second detection signal are input to the control unit 320. As a result, the control unit 320 determines that an object to be heated can be cooked. On the other hand, when the door 20 is not positioned at the closed position, the first detection signal and the second detection signal are not input to the control unit 320. As a result, the control unit 320 determines that an object to be heated is not possible to cook.

[0083] Further, when determining that an object to be heated can be cooked, the control unit 320 executes a control program stored in the storage unit 310, so as to control driving of the microwave supply unit 110, driving of the air blowing unit 140, driving of the first heater unit 120, driving of the second heater unit 130, driving of the first fan 210, driving of the second fan 220, driving of the intake damper unit 83, and driving of the exhaust damper unit 84.

[0084] To be specific, the control unit 320 controls the operation panel 30, the magnetron 113, the first heater 121, the second heater 131, the third heater 142, the drive unit 144, the first fan 210, the second fan 220, the intake damper unit 83, and the exhaust damper unit 84. For example, in a case where the “microwave heating mode” is selected, the control unit 320 drives the magnetron 113, the first fan 210, the second fan 220, the intake damper unit 83, and the exhaust damper unit 84. Further, in a case where the “grill heating mode” is selected, the control unit 320 drives the first heater 121, the second heater 131, the first fan 210, and the second fan 220. Furthermore, in a case where the “hot air circulation heating mode” is selected, the control unit 320 drives the drive unit 144, the first fan 210, and the second fan 220, and drives at least one of the first heater 121, the second heater 131, and the third heater 142.

[0085] The embodiment of the present disclosure is described above with reference to the drawings. However, the present disclosure is not limited to the above embodiment, and can be implemented in various aspects without departing from the gist of the present disclosure. For easy understanding, the drawings schematically illustrate each constituent element mainly, and thickness, length, the number, and the like of constituent elements illustrated in the drawings are different from actual ones for convenience of preparation of the drawings. Further, materials, shapes, dimensions, and the like of constituent elements illustrated in the above embodiment are merely examples, and are not particularly limited, and various modifications can be made without substantially departing from the effects of the present disclosure.

[0086] The present disclosure provides a heating cooker, and has industrial applicability.

Claims

1. A heating cooker comprising:a main body having a suction port;a fan configured to generate airflow;a detection unit that is disposed below the suction port of the main body and a suction port of the fan and is configured to detect opening and closing of a door; anda first guide portion configured to guide the airflow from the suction port of the main body to the detection unit.

2. The heating cooker according to claim 1, further comprising:a damper unit configured to open and close an opening of a heating and cooking chamber that accommodates an object to be heated; anda second guide portion configured to guide the airflow from the detection unit to the damper unit.

3. The heating cooker according to claim 2, whereinan inlet of the second guide portion is provided below the detection unit.

4. The heating cooker according to claim 2, whereinan outlet of the second guide portion is provided above the damper unit.

5. The heating cooker according to claim 4, whereinthe outlet of the second guide portion is provided below the suction port of the main body.

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