Heating cooker

Abstract

This invention provides a heating cooker comprising: a heating chamber having an opening disposed on its front surface; and a door covering the opening of the heating chamber. The door includes an outer frame, a display unit, an operation unit, a radio wave leakage prevention plate, a substrate, a communication device, an air intake, a fan, a first air path, and a second air path. The display unit and the operation unit are disposed on the front surface of the outer frame. The radio wave leakage prevention plate is a metal component mounted on the outer frame. The substrate controls the display unit and the operation unit. The communication device communicates with the outside. The air intake is configured to draw in external air. The fan exhausts air drawn in from the air intake. The first air path is from the fan to the substrate. The second air path is from the fan to the space between the communication device and the radio wave leakage prevention plate.

Description

Technical Field

[0001] This invention relates to a heating cooker for heating food or other heated objects. Background Technology

[0002] Typically, the operating part for operating a heated cooking appliance is located in a door that covers the heating chamber. To protect the operating part from the heat of the heating chamber, a cooling airflow path is formed in the door (see, for example, Japanese Patent No. 5899452).

[0003] Patent Document 1 describes a technique for improving cooling capacity by using a fan arranged in the flow path of cooling air. The fan is configured such that its intake and exhaust ports are approximately perpendicular to the height direction of the door, drawing in external air from below and expelling it upwards.

[0004] In the aforementioned prior art, the fan is positioned approximately perpendicular to the height of the door. Therefore, sufficient space must be ensured within the door to accommodate the fan's thickness. This becomes a constraint on setting the door height and is a major reason why heating cookers are difficult to miniaturize. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned problems existing in the prior art, and its purpose is to provide a small heating cooker.

[0006] One aspect of the present invention provides a heating cooker comprising: a heating chamber having an opening disposed on a front surface; and a door covering the opening of the heating chamber.

[0007] The door has an outer frame, a display unit, an operating unit, a radio wave leakage prevention plate, a base plate, a communication device, an air intake, a fan, a first air duct, and a second air duct.

[0008] The display and operation units are located on the front surface of the outer frame. The electromagnetic leakage prevention panel is a metal component mounted on the outer frame. The base plate controls the display and operation units. The communication device communicates with the outside. An air intake is provided for drawing in external air. A fan expels the air drawn in from the air intake. The first airflow path is from the fan to the base plate. The second airflow path is from the fan to the space between the communication device and the electromagnetic leakage prevention panel.

[0009] According to the technology of the present invention, a compact heating cooker can be provided. Furthermore, the substrate and communication device can be appropriately cooled, improving operational reliability. Attached Figure Description

[0010] Figure 1 This is a diagram showing the appearance of a heating cooker according to an embodiment of the present invention.

[0011] Figure 2 This is a diagram showing the appearance of the heating cooker according to this embodiment.

[0012] Figure 3 This is an exploded 3D view of the door.

[0013] Figure 4 This is a 3D view of the front of the heating cooker with the outer frame removed.

[0014] Figure 5 This is a rear perspective view of part of the door with the inner frame and electromagnetic leakage prevention panel removed.

[0015] Figure 6 It is from Figure 5 A rear perspective view of a portion of the door with the second metal plate removed.

[0016] Figure 7 It is from Figure 6 A rear perspective view of a portion of the door with the first metal plate removed.

[0017] Figure 8 It is from Figure 7 A rear 3D view of part of the door with the fan housing removed.

[0018] Figure 9 This is a 3D view of the front of the fan housing.

[0019] Figure 10 This is a front perspective view of the fan housing with the fan and communication device housed inside.

[0020] Figure 11 It is a diagram used to illustrate the airflow path formed on the front surface of the fan housing.

[0021] Figure 12 This is a diagram used to illustrate the airflow path formed on the rear surface of the fan housing.

[0022] Figure 13A This is a rear view of the outer frame, fan housing, and electromagnetic leakage prevention panel.

[0023] Figure 13B It is along Figure 13A A sectional view along line 13B-13B.

[0024] Figure 13C It is along Figure 13A A three-dimensional view of the cross section of line 13B-13B.

[0025] Figure 14 This is a rear-view perspective view of the outer frame and fan housing.

[0026] Figure 15 This is an enlarged view of the area around the fan housing's fan storage section. Detailed Implementation

[0027] The heating cooker of the first aspect of the present invention comprises: a heating chamber having an opening disposed on a front surface; and a door covering the opening of the heating chamber.

[0028] The door has an outer frame, a display unit, an operating unit, a radio wave leakage prevention plate, a base plate, a communication device, an air intake, a fan, a first air duct, and a second air duct.

[0029] The display and operation units are located on the front surface of the outer frame. The electromagnetic leakage prevention board is a metal component mounted on the outer frame. The base plate controls the display and operation units. The communication device communicates with the outside. An air intake is provided for drawing in external air. A fan expels the air drawn in from the air intake. The first airflow path is from the fan to the base plate. The second airflow path is from the fan to the space between the communication device and the electromagnetic leakage prevention board.

[0030] This method enables the provision of a compact heating cooker. Furthermore, it allows for proper cooling of the substrate and communication device, improving operational reliability.

[0031] According to the second aspect of the heating cooker of the present invention, in the first aspect, the door further includes a first partition separating the fan from the communication device. According to this aspect, the communication device can be appropriately cooled, improving the reliability of its operation.

[0032] According to the third-party heating cooker of the present invention, in a second embodiment, the door further includes a second partition separating the communication device from the space. According to this embodiment, the communication device can be appropriately cooled, improving the reliability of its operation.

[0033] According to a fourth aspect of the heating cooker of the present invention, in the third aspect, the door further includes a fan housing, a communication device housing, and a fan housing. The fan housing houses the fan. The communication device housing houses the communication device. The fan housing forms a first air passage, a second air passage, a first partition, and a second partition. According to this aspect, manufacturing costs can be reduced.

[0034] According to the fifth aspect of the heating cooker of the present invention, in the fourth aspect, a first air passage is formed on the front side of the fan housing and a second air passage is formed on the rear side of the fan housing. According to this aspect, the substrate and communication device can be appropriately cooled, improving operational reliability.

[0035] According to a sixth aspect of the heating cooker of the present invention, in the fifth aspect, the second air passage includes a first through hole extending from the front side to the rear side of the fan housing near the fan. According to this aspect, the communication device can be appropriately cooled, improving the reliability of its operation.

[0036] According to the seventh aspect of the heating cooker of the present invention, in the sixth aspect, the fan housing has a connecting air passage between the fan housing and the first air passage, the connecting air passage having a shape that smoothly narrows from the opening of the fan housing toward the first air passage. According to this aspect, the substrate and communication device can be appropriately cooled, improving the reliability of operation.

[0037] According to the eighth aspect of the heating cooker of the present invention, in the seventh aspect, the first through hole is disposed in connection with the air passage. According to this aspect, the communication device can be appropriately cooled, improving the reliability of operation.

[0038] According to the ninth aspect of the heating cooker of the present invention, in the eighth aspect, the first through hole has a shape that at least a portion follows the sidewall of the connecting air passage. According to this aspect, manufacturing costs can be reduced.

[0039] According to the tenth aspect of the heating cooker of the present invention, in any of the fourth to ninth aspects, the fan housing has an exhaust port above the first air passage for discharging air delivered from the fan. According to this aspect, the substrate can be appropriately cooled, improving operational reliability.

[0040] According to the eleventh aspect of the heating cooker of the present invention, in the tenth aspect, the second air passage includes a second through hole extending from the rear side to the front side of the fan housing near the exhaust port. According to this aspect, the substrate and communication device can be appropriately cooled, improving operational reliability.

[0041] According to the twelfth aspect of the heating cooker of the present invention, in any of the first to eleventh aspects, the air intake is provided at the lower part of the door, the door has a guide member provided at the front side of the door and configured to guide external gas toward the air intake, the lower end of the guide member being formed to face forward rather than directly downward. According to this aspect, the substrate and communication device can be appropriately cooled, improving the reliability of operation.

[0042] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0043] Figure 1 and Figure 2 This shows the appearance of the heating cooker 1 according to this embodiment. Figure 1 This is a perspective view of the front of the heating cooker 1 with the door 7 closed. Figure 2 This is a three-dimensional view of the front of the heating cooker 1 with the door 7 open.

[0044] like Figure 1 and Figure 2As shown, the heating cooker 1 includes a housing 3, a heating chamber 5, and a door 7. The heating chamber 5 is a space having an upper wall 5a, side walls 5b, side walls 5c, a rear wall 5d, and a bottom wall 5e, and is disposed within the housing 3. The door 7 covers an opening 3b, which is disposed on the front frame 3a, which forms the front surface of the housing 3.

[0045] The heating chamber 5 has a microwave emission port for radiating microwaves generated by a microwave oscillator such as a magnetron into the heating chamber 5. The food or other items to be heated placed in the heating chamber 5 are heated by means of the microwaves emitted from the microwave emission port.

[0046] A convection heater and a circulating fan, serving as a heat source, are disposed between the rear wall 5d of the heating chamber 5 and the back plate. An air intake and an exhaust port are disposed on the rear wall 5d of the heating chamber 5.

[0047] When the circulating fan is driven to rotate, air in the heating chamber 5 is drawn in through the intake port, heated by the convection heater, and then returned to the heating chamber 5 through the exhaust port. Thus, the object being heated is heated evenly. An intake port for drawing in outside air into the housing 3 is located at the front of the bottom wall 5e.

[0048] A tank for storing water used to generate steam for supplying to the heating chamber 5 is disposed below the bottom wall 5e. The water stored in the tank is supplied to a steam generating unit (not shown) and becomes steam. This steam is supplied to the heating chamber 5 via a steam pipe connecting the steam generating unit and the heating chamber 5. A control unit (not shown) is disposed between the bottom wall 5e and the tank. The control unit has electronic components such as a microcomputer for controlling heating and other processes in the heating chamber 5.

[0049] Door 7 is pivotally supported on housing 3 below opening 3b, allowing it to be opened and closed via a horizontal rotation axis. A handle 7a is installed on the upper part of the outer frame 13 of door 7. When the user pulls handle 7a to rotate door 7 to a horizontal position, the front surface of heating chamber 5 opens. When the user pushes handle 7a to rotate door 7 to a vertical position, the front surface of heating chamber 5 closes.

[0050] A display unit 9 and an operation unit 11 are arranged on the right side of the front surface of the outer frame 13 of the door 7. The display unit 9 is, for example, an LCD screen for displaying menus, etc. A communication device 40 for communicating with an external device is arranged inside the door 7. The display unit 9 also displays information such as recipes obtained from the external device via the communication device 40. The operation unit 11 consists of, for example, buttons or knobs, for the user to receive instructions on the heating cooker 1.

[0051] Figure 3 It is a 3D exploded view of Gate 7. Figure 3 In the middle, the front and rear sides of the heating cooker 1 correspond to respectively Figure 3 The left and right sides of the middle.

[0052] like Figure 3 As shown, the door 7 comprises, from the front, an outer frame 13, a fan case 19, a first metal plate 21, a second metal plate 23, an electromagnetic leakage prevention plate 25, and an inner frame 27. A display unit 9, an operation unit 11, a substrate 15, and a fan 17 are disposed on the rear surface of the outer frame 13.

[0053] Electronic components such as a microcomputer and an operation unit 11 are arranged on the substrate 15.

[0054] Fan 17 expels external air drawn in from intake ports 14 and 49, thereby cooling electrical components such as the substrate 15 and communication device 40, which are exposed to heat from the heating chamber 5. Fan 17 is positioned forward of the electromagnetic leakage prevention plate 25. Communication device 40 is disposed adjacent to fan 17. Communication device 40 communicates with external devices via any communication method. For example, communication device 40 communicates with external devices via wireless LAN.

[0055] The fan housing 19 is disposed on the rear surface of the outer frame 13 such that it covers the rear of the substrate 15 and the fan 17. A first airflow path 29 is formed in the space between the fan housing 19 and the substrate 15 in front of the fan housing 19. The first airflow path 29 is the airflow path from the fan 17 to the substrate 15. That is, a portion of the fan housing 19 forms the first airflow path 29.

[0056] A second airflow path 31 is formed in the space between the fan housing 19 and the first metal plate 21 behind the fan housing 19. The second airflow path 31 is the airflow path from the fan 17 to the space between the communication device 40 and the radio wave leakage prevention plate 25. That is, another part of the fan housing 19 forms the second airflow path 31.

[0057] The first metal plate 21 is disposed behind the base plate 15 through the fan housing 19, and insulates against heat from the heating chamber 5. The second metal plate 23 is disposed to cover the rear surface of the first metal plate 21, and insulates against heat from the heating chamber 5.

[0058] The electromagnetic wave leakage prevention panel 25 is a metal panel used to prevent electromagnetic waves from leaking from the interior of the heating chamber 5 to the outside through the door 7. The electromagnetic wave leakage prevention panel 25 is installed on the rear surface of the outer frame 13 in such a way that it covers the rear surface of the second metal plate 23. The inner frame 27 holds the electromagnetic wave leakage prevention panel 25 together with the outer frame 13.

[0059] Figure 4 This is a perspective view of the front of the heating cooker 1 with the outer frame 13 removed from door 7. Figure 4As shown, the electromagnetic leakage prevention plate 25 is disposed immediately outside the opening of the heating chamber 5. Therefore, when the interior of the heating chamber 5 is heated to a high temperature, the electromagnetic leakage prevention plate 25 also becomes high-temperature.

[0060] like Figure 3 As shown, the communication device 40 is located at the lower part of the outer frame 13, near the lower part of the electromagnetic leakage prevention plate 25. Therefore, the heating cooker 1 needs a structure that insulates the electromagnetic leakage prevention plate 25 and the communication device 40 and is used to cool the communication device 40. This structure can prevent the temperature of the communication device 40 from exceeding its operating temperature range even if the electromagnetic leakage prevention plate 25 becomes high due to the heat inside the heating chamber 5.

[0061] Figure 5 This is a rear perspective view of a portion of door 7 with the inner frame 27 and the electromagnetic leakage prevention plate 25 removed. (See image below.) Figure 3 and Figure 5 As shown, a second metal plate 23 is disposed on the left side of the outer frame 13. The second metal plate 23 is located behind the substrate 15 and is disposed between the heating chamber 5 and the first metal plate 21 in the front-to-back direction.

[0062] Figure 6 It is from Figure 5 The diagram shown is a rear perspective view of a portion of door 7 with the second metal plate 23 removed. (See diagram below.) Figure 3 and 6 As shown, the first metal plate 21 is located behind the substrate 15 and is disposed between the second metal plate 23 and the fan housing 19 in the front-back direction.

[0063] Figure 7 It is from Figure 6 The diagram shown is a rear perspective view of a portion of door 7 with the first metal plate 21 removed. (See diagram below.) Figure 3 and Figure 7 As shown, the fan housing 19 is located behind the substrate 15 and is disposed between the substrate 15 and the first metal plate 21 in the front-to-back direction.

[0064] The fan housing 19 has a fan storage section 41 and a communication device storage section 42 at its lower part. The fan storage section 41 and the communication device storage section 42 respectively house the fan 17 and the communication device 40 on the front side of the fan housing 19. An air intake 49 for drawing in external air is provided at the lower part of the fan storage section 41.

[0065] The portion of the fan housing 19 located behind the fan 17 and communication device 40 separates the space behind the fan 17 and communication device 40 from the space between the fan housing 19 and the first metal plate 21. That is, a portion of the fan housing 19 functions as a second partition. Figures 5-8In the figures, the front and rear sides of the heating cooker 1 correspond to the inner side and near-front side, respectively. Regarding... Figure 8 To be described later.

[0066] Two through holes 19a arranged in the vertical direction are formed in the upper half of the fan housing 19. The two through holes 19a are, for example, elongated holes extending in the vertical direction. A cover 19c with a left-side opening when viewed from the front and rear is disposed behind the through holes 19a.

[0067] The shroud 19c changes the direction of the cooling air flowing from the front to the rear of the fan housing 19 through the through-hole 19a. As a result, the cooling air through the through-hole 19a flows to the left when viewed from the rear side along the rear surface of the fan housing 19.

[0068] A through hole 43, which functions as a first through hole, is formed in the lower half of the fan housing 19. The through hole 43 is, for example, a triangular hole. Above the through hole 43, a wall 44 protruding rearward from the fan housing 19 is formed.

[0069] Wall 44 is an elongated plate disposed on the rear surface of fan housing 19 and extending horizontally. Wall 44 alters the direction of cooling air flowing from the front to the rear of fan housing 19 through through hole 43. As a result, the cooling air through through hole 43 flows downward along the rear surface of fan housing 19.

[0070] A wall 19d is formed on the left side of the lower part of the fan housing 19 when viewed from the rear. The wall 19d is an elongated plate disposed on the rear surface of the fan housing 19 and extending in the vertical direction. The wall 19d changes the direction of the cooling airflow flowing from the shroud 19c to the left when viewed from the rear. As a result, the cooling airflow flows to the right when viewed from the rear.

[0071] A through hole 19b, which functions as a second through hole, is formed in the upper part of the fan housing 19. An exhaust port 45 is formed at the upper end of the fan housing 19. Cooling air flowing upward along the rear surface of the fan housing 19 returns to the front side of the fan housing 19 through the through hole 19b and is discharged from the exhaust port 45.

[0072] Figure 8 It is from Figure 7 The view shown further shows a rear perspective view of door 7 with a portion removed from the fan housing 19. (See attached image.) Figure 3 and Figure 8 As shown, the substrate 15, display unit 9, fan 17 and communication device 40 are located behind the outer frame 13 and are arranged between the outer frame 13 and the fan housing 19 in the front-to-back direction.

[0073] The intake 17a of fan 17 faces the front-to-back direction of the closed door 7. The exhaust 17b of fan 17 faces the top of the closed door 7. Therefore, fan 17 draws in air in the front-to-back direction of the closed door 7.

[0074] That is, the intake direction of fan 17 intersects the direction of the intake port 49 of fan housing 19 at a right angle, for example. Fan 17 exhausts air in a direction that intersects the direction of air intake at a right angle with the direction of air intake of fan 17. Therefore, the rotation axis of the blades of fan 17 is oriented in the front-back direction. For example, a Sirocco fan is used as fan 17.

[0075] Figure 9 This is a front perspective view of the fan housing 19. Figure 10 This is a front perspective view of the fan housing 19 with the fan 17 and communication device 40 housed within it. Figures 9-11 In the figures, the front and rear sides of the heating cooker 1 correspond to the inner side and near-front side, respectively. Regarding... Figure 11 To be described later.

[0076] like Figure 9 and Figure 10 As shown, fan 17 is configured adjacent to communication device 40. Fan housing 19 has a partition 46 located between fan 17 and communication device 40, formed on the rear surface of fan housing 19. Partition 46 is integrally formed with fan housing 19. Partition 46 functions as a first partition separating fan 17 and communication device 40.

[0077] Air delivered from fan 17 is drawn in through air intake 49 located at the lower part of fan housing 19. An exhaust port is located at the front of the bottom wall 5e of the heating cooker 1, for discharging the air heated in heating chamber 5 to the outside. Therefore, when heating an object in heating chamber 5, the temperature of the external air drawn in from air intake 49 may exceed the permissible operating temperature range of communication device 40.

[0078] The partition 46 prevents the air delivered from the fan 17 from blowing directly onto the communication device 40. Thus, even if the temperature of the air delivered from the fan 17 exceeds the allowable operating temperature range of the communication device 40, the communication device 40 can be prevented from being heated by the high-temperature air delivered from the fan 17.

[0079] The partition 46 can separate the entire space between the fan housing 41 and the communication device housing 42, or it can separate a portion of that space. For example, the partition 46 may also have holes for allowing wiring that connects the fan 17 or the communication device 40 to the substrate 15 or a power circuit (not shown) to pass through.

[0080] Viewed from the front, a wall 19e protruding forward is disposed at the left end of the fan housing 19. Viewed from the front, a wall 19g protruding forward is disposed parallel to wall 19e on the left side above the fan housing 41 of the fan housing 19. A groove 19m is formed by walls 19e and 19g. A through hole 19a is disposed at the upper part of the groove 19m. A hole 19h is disposed in wall 19g.

[0081] Between the opening at the top of the fan housing 41 and the slot 19m, a connecting air passage 48 is formed by walls 19e and 47. A through hole 43 is provided in the connecting air passage 48.

[0082] Figure 11 This is a diagram illustrating the airflow path formed on the front surface of the fan housing 19. (See diagram for example.) Figure 11 As shown, air drawn in through the intake port 49 is sent from the fan 17 to the connecting air passage 48. In the connecting air passage 48, a portion of the air sent to the connecting air passage 48 flows through the through hole 43 to the rear side of the fan housing 19. The remaining air flows upward in the groove 19m between the wall 19e and the wall 19g.

[0083] A portion of the air flowing in the slot 19m flows towards the substrate 15 through the hole 19h. That is, the first airflow path 29 from the fan 17 to the substrate 15 includes a connecting airflow path 48, the lower part of the slot 19m, and the hole 19h. External gas delivered from the fan 17 through the first airflow path 29 can cool the substrate 15. This improves the reliability of the substrate 15's operation.

[0084] The first air passage 29 is formed in one direction. Therefore, pressure loss in the first air passage 29 can be reduced. The heated air flows toward the exhaust port 45 disposed at the upper end of the fan housing 19 within the first air passage 29. This further reduces pressure loss. As a result, the airflow of cooling air through the first air passage 29 can be ensured, and the cooling efficiency of the substrate 15 can be improved.

[0085] The hole 19h is positioned above the communication device housing 42. Therefore, when the air flowing from the hole 19h toward the substrate 15 is hotter than the air in the space in front of the fan housing 19, it does not flow toward the communication device housing 42 but rises toward the substrate 15. This prevents the communication device 40 from being heated by the hot air.

[0086] Air that does not flow to the substrate 15 in the hole 19h flows further upward in the groove 19m, and then flows to the rear side of the fan housing 19 from the through hole 19a.

[0087] To save space, the slot 19m has a width narrower than the opening of the fan 17. Therefore, a connecting air passage 48 is arranged between the slot 19m and the fan 17, the connecting air passage 48 having a shape that smoothly narrows from the opening of the fan 17 toward the slot 19m. When viewed from the front, a curved wall 19e is formed from the upper end of the left side wall of the fan housing 41 toward the right. When viewed from the front, a flat wall 47 is formed from the upper end of the right side partition wall 46 of the fan housing 41 toward the left.

[0088] A connecting air passage 48 is formed by walls 19e and 47. Wall 47 is inclined so that the angle between wall 47 and partition wall 46 is greater than a right angle. This prevents air from stagnating in the space between fan 17 and slot 19m. As a result, it is possible to prevent the air around fan 17 from becoming too hot, and to prevent the adjacent communication device 40 from becoming too hot.

[0089] The through-hole 43 is disposed along the wall 47 in the connecting air passage 48. The wall 47 is disposed at an angle as described above. Therefore, the through-hole 43 is formed into a triangular shape with sides inclined along the wall 47. Thus, by disposing of the through-hole 43 in the connecting air passage 48, space can be utilized effectively. However, the through-hole 43 can also have any shape.

[0090] Figure 12 This is a diagram illustrating the airflow path formed on the rear surface of the fan housing 19. (See diagram for example.) Figure 12 As shown, air passing through the through hole 43 flows toward the communication device housing 42 via the wall 44. That is, the second air passage 31 from the fan 17 to the space between the communication device 40 and the first metal plate 21 includes the connecting air passage 48, the through hole 43 and the wall 44.

[0091] Therefore, the communication device 40 can be cooled by external air indirectly supplied from the fan 17 via the fan housing 19. As a result, the reliability of the operation of the communication device 40 can be improved.

[0092] By providing a through hole 43 in the connecting air passage 48 immediately above the fan 17, cooling air can easily flow to the communication device housing 42, which is located further down. As a result, the cooling efficiency of the communication device 40 can be improved.

[0093] Air flowing upwards through the through-hole 43 from between wall 44 and wall 19d. Air flowing through the through-hole 19a flows in the third air passage 33, which passes through the space between substrate 15 and first metal plate 21. Thus, substrate 15 can be cooled by external air indirectly supplied from fan 17 via fan housing 19. As a result, the reliability of substrate 15 operation can be improved.

[0094] Air flowing upward along the rear surface of the fan housing 19 returns to the front side of the fan housing 19 through the through hole 19b and is discharged from the exhaust port 45.

[0095] Cooling air, passing through an airflow path to the rear surface of the fan housing 19, flows in the space between the rear surface of the fan housing 19 and the first metal plate 21. This cools the first metal plate 21. Simultaneously, this cooling air forms an air curtain between the fan housing 19 and the first metal plate 21. This reduces heat transfer to the fan housing 19.

[0096] Even when the air in the space between the first metal plate 21 and the fan housing 19 is heated by the heat of the first metal plate 21, the air can be quickly discharged from the exhaust port 45 through the second air passage 31 and the third air passage 33. As a result, heat accumulation in the space between the first metal plate 21 and the fan housing 19 can be suppressed, and the cooling efficiency of the substrate 15 and the communication device 40 can be improved.

[0097] Figures 13A-13C This is a diagram used to illustrate the air intake 14 of the outer frame 13. Figure 13A This is a rear view of the outer frame 13, the fan housing 19, and the electromagnetic leakage prevention plate 25. Figure 13B It is along Figure 13A A sectional view along line 13B-13B. Figure 13C It is along Figure 13A A three-dimensional view of the cross section of line 13B-13B.

[0098] like Figures 13A-13B As shown above, an air intake 49 is provided at the lower end of the fan housing 19. An air intake 14 is located near the air intake 49 on the lower surface of the outer frame 13. Sometimes, high-temperature air discharged from the heating chamber 5 is present around the air intake 14. In particular, the air directly below and to the rear of the air intake 14 near the heating chamber 5 may be hotter than the air to the front of the air intake 14.

[0099] In this embodiment, a guide 50 for guiding external gas to the intake port 14 is disposed around the intake port 14. The guide 50 is formed to face forward rather than downward. As a result, air that is closer to room temperature and is not located directly below the intake port 14 can be drawn in from the intake port 14.

[0100] As a result, the cooling efficiency of the cooling air can be improved. Since hot air is not blown, heating of electrical components such as the communication device 40 and the substrate 15 can be suppressed.

[0101] Figure 14This is a rear perspective view of the outer frame 13 and the fan housing 19. (See attached image.) Figure 14 As shown above, an exhaust port 45 is provided at the upper end of the fan housing 19. Air passing through the first air passage 29 on the front side of the fan housing 19 is directly discharged from the exhaust port 45.

[0102] Air passing through the second air passage 31 and the third air passage 33 on the rear side of the fan housing 19 returns to the front surface of the fan housing 19 through the through hole 19b. This air, along with the air passing through the first air passage 29, is discharged from the exhaust port 45. The exhaust port 45 is covered by the frame 51. Therefore, even if moisture enters the outer frame 13, the substrate 15 and the communication device 40 can be protected from moisture.

[0103] Figure 15 This is an enlarged view of the area surrounding the fan housing 41 of the fan housing 19. (See image below.) Figure 15 As shown, the fan 17 has a fixing part 54a and a fixing part 54b. The fixing parts 54a and 54b have holes for fixing the fan 17 with pins for positioning when the fan 17 is installed in the fan storage part 41. The fan 17 is installed in the fan storage part 41 by inserting a pin formed in the outer frame 13 or the fan housing 19 into the hole.

[0104] If only pins are used for fixing, the fan 17 may sometimes make noise due to vibration when it is running. In this embodiment, pressing parts 53a and 53b are disposed on the fan housing 19. The pressing parts 53a and 53b press the fan 17 to the outer frame 13 near the fan storage part 41 of the fan housing 19.

[0105] Screw holes 52a and 52b are provided on both the fan housing 19 and the outer frame 13. The screw holes 52a and 52b function as fasteners for securing the fan housing 19 and the outer frame 13 near the pressing parts 53a and 53b.

[0106] After fixing the fan 17 to the fan housing 41, screws are inserted and tightened into the screw holes 52a and 52b. This allows the pressing parts 53a and 53b to press the fan 17 against the outer frame 13 with appropriate strength. As a result, vibration noise caused by the vibration of the fan 17 and the fan housing 41 during operation can be suppressed.

[0107] Pressing parts 53a, 53b or screw holes 52a, 52b are located near fixing parts 54a, 54b. Fixing parts 54a, 54b are components used to fix the fan 17 when it is installed.

[0108] The fixing parts 54a and 54b have an intensity that assumes a certain degree of pressure to be applied in their vicinity. Therefore, when the fan 17 is pressed against the outer frame 13 in the vicinity of the fixing parts 54a and 54b, the vibration of the fan 17 can be suppressed without affecting the operation of the fan 17.

[0109] Screw holes 52a and 52b have the same diameter as other screw holes 52c located in other positions on the fan housing 19. This reduces the variety of screws used in assembling the fan housing 19, thereby lowering manufacturing costs.

[0110] According to this embodiment, a portion of the fan 17 is disposed inside the electromagnetic leakage prevention plate 25. This reduces the height of the door 7, enabling miniaturization of the heating cooker 1. By arranging the substrate 15 and the communication device 40 within the door 7, ample space is ensured within the heating chamber 5, further allowing for miniaturization of the heating cooker 1.

[0111] In this embodiment, a heating cooker that uses microwaves, heaters, or steam to heat the object has been described. However, the technology of the present invention can be applied to heating cookers of any type.

Claims

1. A heating cooker, the heating cooker having: A heating chamber having an opening configured on the front surface; as well as A door that covers the opening of the heating chamber. The gate includes: Outer frame; A display section and an operation section are disposed on the front surface of the outer frame; A metal electromagnetic leakage prevention plate is installed on the outer frame; A substrate configured to control the display unit and the operation unit; A communication device configured to communicate with the outside world; The air intake is configured to draw in external gas. A fan configured to expel air drawn in from the air intake. A first airflow path from the fan to the substrate; and The second airflow path extends from the fan to the space between the communication device and the electromagnetic leakage prevention plate. The fan and the communication device are located at the lower part of the door. The substrate is positioned above the fan. The communication device is located on the side of the fan. The heating cooker is configured such that air flowing from the fan to the first air path is separated from air flowing from the fan to the second air path.

2. The heating cooker according to claim 1, wherein, The door also includes a first partition that separates the fan and the communication device.

3. The heating cooker according to claim 2, wherein, The door also includes a second partition that separates the communication device from the space.

4. The heating cooker according to claim 3, wherein, The door also includes: a fan housing for housing the fan; a communication device housing for housing the communication device; and a fan housing that forms the first air passage, the second air passage, the first partition, and the second partition.

5. The heating cooker according to claim 4, wherein, The first air passage is formed on the front side of the fan housing, and the second air passage is formed on the rear side of the fan housing.

6. The heating cooker according to claim 5, wherein, The second airflow path includes a first through hole extending from the front side to the rear side of the fan housing near the fan.

7. The heating cooker according to claim 6, wherein, The fan housing has a connecting air passage between the fan housing and the first air passage, and the connecting air passage has a shape that smoothly narrows from the opening of the fan housing toward the first air passage.

8. The heating cooker according to claim 7, wherein, The first through hole is disposed in the connecting air passage.

9. The heating cooker according to claim 8, wherein, The first through hole has a shape that extends at least partly along the sidewall of the connecting air passage.

10. The heating cooker according to claim 4, wherein, The fan housing has an exhaust port above the first air passage for discharging air delivered from the fan.

11. The heating cooker according to claim 10, wherein, The second air passage includes a second through hole extending from the rear side to the front side of the fan housing near the exhaust port.

12. The heating cooker according to claim 1, wherein, The air intake is located at the bottom of the door. The door includes a guide disposed on the front side of the door and configured to guide external gas toward the air intake. The guide is shaped to face forward rather than directly downward.

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