CN111758005A

CN111758005A - Heating cooker

Info

Publication number: CN111758005A
Application number: CN201980015024.5A
Authority: CN
Inventors: 川添弘一朗; 中富嗣朗
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2018-02-28
Filing date: 2019-02-14
Publication date: 2020-10-09
Anticipated expiration: 2039-02-14
Also published as: EP3760930A4; JP2019152345A; CN111758005B; JP6906199B2; WO2019167639A1; EP3760930A1

Abstract

The door has: an outer frame; a radio wave leakage prevention plate disposed on the rear side of the outer frame; an inner frame which sandwiches the radio wave leakage prevention plate together with the outer frame; and an air inlet for taking in the external air at the lower part of the outer frame. The door has a base plate (15) disposed in the outer frame, a fan (17) disposed in the outer frame, and a first air passage (29) from the fan (17) to the base plate (15). The fan (17) is disposed at a position forward of the radio wave leakage prevention plate. At least a part of the fan (17) is disposed inside the radio wave leakage prevention plate. The suction direction of the air inlet (17a) of the fan (17) is arranged in the direction intersecting with the air inlet of the outer frame, and the direction is the front-back direction of the door in the upright state. The discharge direction of the exhaust port (17b) of the fan (17) is arranged in a direction intersecting the suction direction of the fan (17). Thus, the height of the door can be shortened, and a heating cooker which can be miniaturized can be provided.

Description

Heating cooker

Technical Field

The present invention relates to a heating cooker for heating food in a heating chamber.

Background

Conventionally, a heating cooker having the following structure is disclosed: a flow path of cooling air is provided in a door in which an operation portion is disposed, and the operation portion is not affected by the heat of hot air in a heating chamber having a high temperature (see, for example, patent document 1).

In the heating cooker described in patent document 1, a fan is disposed in a flow path of a door through which cooling air flows, thereby improving cooling performance. The fan includes an intake port and an exhaust port arranged substantially perpendicular to the height direction of the door. The fan sucks air from below through the air inlet and discharges the air upward through the air outlet.

However, since the fan is disposed in the height direction of the door, a space corresponding to the thickness of the fan must be secured in the height direction of the door. Therefore, the height of the door cannot be shortened, and it is difficult to miniaturize the heating cooker.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5899452

Disclosure of Invention

The invention provides a heating cooker which can be miniaturized.

A heating cooker according to one aspect of the present invention includes: a heating chamber having an opening; and a door that openably and closably covers an opening of the heating chamber. The door is provided with: an outer frame; a radio wave leakage preventing plate installed at the rear side of the outer frame; an inner frame which sandwiches the radio wave leakage prevention plate together with the outer frame; an air suction port arranged at the lower part of the outer frame for taking in the external air; a substrate mounted on the outer frame; a fan mounted on the outer frame; and a first air path from the fan to the substrate. The fan is disposed in front of the radio wave leakage prevention plate, and at least a part of the fan is disposed inside the radio wave leakage prevention plate when viewed from the rear. The suction direction of the air inlet of the fan is arranged in a direction intersecting the air inlet of the frame, and the direction is the front-back direction of the door in the standing state. The discharge direction of the exhaust port of the fan is arranged in a direction intersecting the suction direction of the fan.

Thus, a heating cooker that can be reduced in size can be provided.

Drawings

Fig. 1 is a front view of a heating cooker according to an embodiment.

Fig. 2 is a front perspective view of the heating cooker.

Fig. 3 is an exploded perspective view of the door of the heating cooker.

Fig. 4 is a rear perspective view of the heating cooker with the inner frame removed from the door.

Fig. 5 is a rear perspective view of the radio wave leakage prevention plate removed from the door shown in fig. 4.

Fig. 6 is a rear perspective view of a state where the second metal plate is removed from the door shown in fig. 5.

Fig. 7 is a rear perspective view of a state where the first metal plate is removed from the door shown in fig. 6.

Fig. 8 is a rear view of a state where the first metal plate is detached from the door shown in fig. 6.

Fig. 9 is a rear perspective view of the fan housing removed from the door shown in fig. 7.

Fig. 10 is a rear view of a state where the fan housing is detached from the door shown in fig. 7.

Fig. 11 is an enlarged view of the periphery of the fan shown in fig. 10.

Fig. 12 is a diagram illustrating a positional relationship between a radio wave leakage prevention plate and a fan of a door of the heating cooker.

Fig. 13 is a view of the inside of the door of the heating cooker as viewed in a vertical cross section around the fan.

Fig. 14 is a front perspective view of the fan, the fan case, and the base plate of the heating cooker.

Fig. 15 is a diagram illustrating an air path of the heating cooker.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiment.

(embodiment mode)

A heating cooker according to an embodiment of the present invention will be described below with reference to fig. 1 and 2.

Fig. 1 is a front view of a heating cooker 1 according to the embodiment. Fig. 2 is a front perspective view of the heating cooker 1 in a state where the door 7 is opened. In the following description, the X direction is the longitudinal direction (width direction or left-right direction) of the heating cooker 1, the Y direction is the front-back direction, and the Z direction is the height direction. In the following description, the height refers to a distance from a mounting surface of the heating cooker 1.

As shown in fig. 1 and 2, a heating cooker 1 of the present embodiment includes a casing 3, a heating chamber 5 disposed in the casing 3, a door 7, and the like. The door 7 includes an outer frame 13, and the outer frame 13 openably and closably covers an opening 3b opened in a front frame 3a serving as a front surface of the housing 3.

The heating chamber 5 is constituted by a space surrounded by an upper wall 5a disposed at the upper portion,

side walls

5b and 5c disposed at both side portions, a rear wall (not shown) disposed at the rear portion, and a bottom wall 5e disposed at the lower portion. The heating chamber 5 is provided with a microwave radiation port (not shown) for radiating microwaves. The heating cooker 1 is configured to inductively heat an object to be heated (food) placed in the heating chamber 5 by microwaves emitted from the microwave radiation ports.

The heating chamber 5 includes a steam outlet (not shown) at an upper portion thereof. Thereby, steam generated by a steam generator (not shown) is supplied into the heating chamber 5.

The door 7 has a rotation center in the horizontal direction on the lower side of the opening 3 b. Thus, the door 7 is attached to the housing 3 so as to be openable and closable around the rotation center. The door 7 includes a handle 7a mounted on an upper portion of the outer frame 13. The user pulls the handle 7a forward and downward to horizontally rotate the door 7, thereby opening the heating chamber 5. The user turns the door 7 to be vertical, thereby closing the heating chamber 5.

The outer frame 13 of the door 7 includes a display unit 9 and an operation unit 11, which are disposed near the other side (right side) in the longitudinal direction (X direction) when viewed from the front. The display unit 9 is configured by, for example, a liquid crystal screen and displays a menu screen. The operation unit 11 includes functions such as a button and a knob. The user can set various cooking instructions and the like for the heating cooker 1 using the operation unit 11. In the following description, one side in the length direction of the heating cooker 1 is the left side and the other side is the right side when viewed from the front.

Next, the structure of the door 7 will be described with reference to fig. 3.

Fig. 3 is an exploded perspective view of the door 7. In the following, when the positional relationship of the components of the door 7 is described, the positional relationship in the state where the door 7 is arranged in the standing state in the Z direction will be described.

As shown in fig. 3, the door 7 includes, in order from the front side (in the (-Y direction), an outer frame 13, a display portion 9, a substrate 15, a fan 17, a fan case 19, a first metal plate 21 and a second metal plate 23 constituting metal plates, a radio wave leakage prevention plate 25, an inner frame 27, and the like. That is, the door 7 includes at least the above-described constituent components.

Electronic components for controlling the display unit 9, the operation unit 11, and the like are disposed on the substrate 15. Further, a heating element (not shown) that generates heat during operation is disposed on the substrate 15. The heat generating body is, for example, a microcomputer.

The fan 17 takes in outside air (outside air) into the door 7 and sends the air out of the door 7. Thereby, the substrate 15 whose temperature is raised by the heat from the heating chamber 5 is cooled. The fan 17 is disposed forward (in the (-Y direction) of the wave leakage prevention plate 25.

The fan case 19 covers the rear sides of the substrate 15 and the fan 17, and forms an air passage through which cooling air generated by the fan 17 flows.

The first metal plate 21 is disposed behind the substrate 15 with the fan case 19 interposed therebetween. The first metal plate 21 has a function of insulating heat transferred from the heating chamber 5 to the substrate 15.

The second metal plate 23 is configured to cover the rear surface of the first metal plate 21. The second metal plate 23 also has a function of insulating heat transferred from the heating chamber 5 to the substrate 15, similarly to the first metal plate 21.

The radio wave leakage prevention plate 25 is made of a metal plate such as a hot-dip galvanized steel plate or an aluminum-plated steel plate, and is attached to the rear side of the outer frame 13. The radio wave leakage prevention plate 25 prevents radio waves (microwaves) from leaking from the inside of the heating chamber 5 to the outside through the door 7.

The inner frame 27 is mounted on the rear side of the wave leakage prevention plate 25. At this time, the inner frame 27 is disposed so as to sandwich the radio wave leakage prevention plate 25 with the outer frame 13.

Next, the structure of the door 7 will be further described with reference to fig. 4 to 6.

Fig. 4 is a rear perspective view of the door 7 with the inner frame 27 removed. Fig. 5 is a rear perspective view of the radio wave leakage prevention plate 25 removed from the door 7 shown in fig. 4. Fig. 6 is a rear perspective view of the state where the second metal plate 23 is removed from the door 7 shown in fig. 5.

As shown in fig. 4, the radio wave leakage prevention plate 25 is disposed inside the outer frame 13 along the outer edge of the outer frame 13.

As shown in fig. 5, the second metal plate 23 is disposed on the other side (right side) in the longitudinal direction (X direction) 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-rear direction (Y direction).

As shown in fig. 6, the first metal plate 21 is located behind the substrate 15 and is disposed between the second metal plate 23 and the fan case 19 in the front-rear direction (Y direction).

Next, the structure of the door 7 will be described with reference to fig. 7 and 8.

Fig. 7 is a rear perspective view of the state where the first metal plate 21 is removed from the door 7 shown in fig. 6. Fig. 8 is a rear view of a state where the first metal plate 21 is detached from the door 7 shown in fig. 6.

As shown in fig. 7, the fan case 19 is located behind the substrate 15 and is disposed between the substrate 15 and the second metal plate 23 in the front-rear direction (Y direction).

The fan case 19 includes a hole 19a as a through hole in the vicinity of the inner side (left side) of the upper portion. The hole 19a is formed by, for example, a long hole extending in the vertical direction (Z direction). Two holes 19a are formed in the fan case 19 in parallel in the vertical direction. A cover 19c, for example, L-shaped, which opens to the front and to the outside (right side) in the longitudinal direction of the door 7 is attached to the fan case 19 behind the hole 19 a. The cover 19c functions to change the direction of the cooling air flowing rearward from the substrate 15 so as to flow outward and sideward on the rear surface of the fan housing 19.

The fan housing 19 has a plurality of upper holes 19b formed along the longitudinal direction of the door 7 near the upper portion. Thereby, the cooling air flowing from the lower end to the upper end of the substrate 15 flows into the rear surface of the fan housing 19 through the upper hole 19 b.

Further, a wall 19d projecting rearward (Y direction) is disposed near the outer side (right side) of the lower portion of the fan case 19 on the other side (right side) in the longitudinal direction (X direction) of the door 7. This makes it possible to turn the cooling air flowing from the cover 19c to the outside toward the inside by reflecting the cooling air by the wall 19 d.

Next, the structure of the door 7 will be further described with reference to fig. 9 and 10.

Fig. 9 is a rear perspective view of a state where the fan housing 19 is removed from the door 7 shown in fig. 7. Fig. 10 is a rear view of a state where the fan housing 19 is detached from the door 7 shown in fig. 7.

As shown in fig. 9 and 10, the outer frame 13 of the door 7 has a suction port 13a formed in the lower portion of the other side (right side) in the longitudinal direction (X direction) and into which external air is taken. Further, the display unit 9 and the substrate 15 are mounted on the outer frame 13. Further, a fan 17 is disposed above the air inlet 13a in the vicinity of the other lower portion of the outer frame 13 in the longitudinal direction.

Next, the peripheral structure of the fan 17 will be described with reference to fig. 11. Fig. 11 is an enlarged view of the periphery of the fan 17 shown in fig. 10.

As shown in fig. 11, the fan 17 has an intake port 17a and an exhaust port 17 b. The opening of the air inlet 17a is provided in the front-rear direction (Y direction) of the door 7. On the other hand, the opening of the exhaust port 17b of the fan 17 is provided toward the upper direction (Z direction) of the door 7.

Thus, the suction port 17a of the fan 17 for sucking the outside air is disposed in the front-rear direction (Y direction) of the door 7 in the upright state, that is, in the direction intersecting the suction port 13a of the outer frame 13 (see fig. 13). The suction direction of the fan 17 may be perpendicular to the direction intersecting the suction port 13 a. On the other hand, the exhaust port 17b of the fan 17 is disposed in a direction intersecting the intake direction of the intake port 17 a. The direction in which the suction port 17a of the fan 17 is discharged and the suction port 17b of the fan 17 is sucked may be perpendicular to each other. Therefore, the rotation axis of the blades of the fan 17 is arranged in the front-rear direction (Y direction). Examples of the fan 17 include a sirocco fan and the like.

The outer frame 13 includes a first partition wall 13c and a second partition wall 13d extending rearward (Y direction) from the rear surface of the outer frame 13. The groove 13b is formed by the first partition wall 13c, the second partition wall 13d, and a rear wall 13e which is a part of the rear surface of the outer frame 13. The groove 13b extends upward from the exhaust port 17b of the fan 17.

Next, the positional relationship between the radio wave leakage prevention plate 25 and the fan 17 will be described with reference to fig. 12.

Fig. 12 is a diagram illustrating a positional relationship between the radio wave leakage prevention plate 25 and the fan 17 of the door 7 of the heating cooker 1.

As shown in fig. 12, at least a part of the fan 17 is disposed inside the radio wave leakage prevention plate 25 when viewed from the rear, and is covered with the radio wave leakage prevention plate 25. Specifically, the fan 17 is configured such that, for example, the vicinity of the upper portion and the central portion including the exhaust port 17b enters the inside of the radio wave leakage prevention plate 25. The lower portion of the fan 17 is disposed to protrude downward from the lower edge portion 25a of the radio wave leakage prevention plate 25. With this arrangement, since it is not necessary to dispose the air inlet and the air outlet in the vertical direction as in the conventional fan structure, the length (dimension) of the door 7 in the height direction can be shortened.

Next, an air passage of the cooling air flowing from the fan 17 will be described with reference to fig. 13 to 15.

Fig. 13 is a view of the inside of the door 7 as viewed in a vertical cross section around the fan 17. Fig. 14 is a front perspective view of the fan 17, the fan case 19, and the substrate 15. Fig. 15 is a diagram illustrating an air path. In fig. 15, the fan case 19 is shown by a broken line and is illustrated in a see-through state.

As shown in fig. 14, the fan case 19 further includes an outer side wall 19e, a partition wall 19g, a hole 19h, and a front wall 19 k. The outer wall 19e extends forward (in the Y direction) from an inner (left) end of the front surface of the fan housing 19. The partition wall 19g extends forward (in the Y direction) on the outer side (right side) of the outer wall 19e in parallel with the outer wall 19 e. The hole 19h is opened in the partition wall 19g at a position corresponding to a branch point of a first duct 29 and a second duct 31 constituting a duct described later. The front wall 19k is constituted by a part of the front surface of the fan housing 19. The groove 19m is formed by the outer wall 19e, the partition wall 19g, and the front wall 19 k. Specifically, the groove 19m extends upward from the exhaust port 17b of the fan 17.

Further, the groove 13b of the outer frame 13 and the groove 19m of the fan case 19 are fitted in the front-rear direction (Y direction). This forms an air passage through which the outside air discharged from the air outlet 17b of the fan 17 flows upward (Z direction) in the fan case 19. At this time, the hole 19h formed in the partition wall 19g of the fan case 19 is a branch point of the first air passage 29 and the second air passage 31. Thereby, a part of the cooling air flows onto the substrate 15 through the holes 19 h. On the other hand, the cooling air that does not pass through the hole 19h and flows upward of the fan housing 19 passes through the second air passage 31.

Hereinafter, the air passage formed in the door 7 will be described in detail.

First, the external air indicated by an arrow AA taken in from the inlet 13a (see fig. 13) of the outer frame 13 is sucked in from the inlet 17a of the fan 17 through the inlet 19f (see fig. 11 and 13) of the fan case 19 disposed to face the inlet 13a in the front-rear direction. At this time, the outside air taken in from below the fan 17 is returned to the rear of the fan 17 as indicated by arrow BB, sucked through the air inlet 17a, and discharged through the air outlet 17b as indicated by arrow CC.

The cooling air discharged from the air outlet 17b at the upper portion of the fan 17 flows upward along the groove 13b constituting the air passage. At this time, as shown in fig. 14, a first air passage 29 is formed in the middle of the air passage flowing upward along the groove 13b of the outer frame 13, and the first air passage is branched into the substrate 15 side by the holes 19h formed in the partition wall 19 g. Therefore, the cooling air flowing along the first air passage 29 on the substrate 15 flows toward the upper hole 19b of the fan case 19 as indicated by an arrow DD in fig. 15. The cooling air passing through the upper hole 19b flows along the third air passage 33 shown in fig. 8 and 15 on the rear surface side of the fan case 19. As shown in fig. 8, the third air passage 33 is connected to a fourth air passage 35 that flows between the fan case 19 and the first metal plate 21.

On the other hand, the cooling air that branches from the first air passage 29 and flows further upward along the groove 13b of the outer frame 13 flows along the second air passage 31 that passes through the hole 19a (see fig. 7 and 15) of the fan casing 19 on the rear surface side of the fan casing 19. Further, the fourth air passage 35 (see fig. 8) is connected to the air flowing between the fan case 19 and the first metal plate 21.

As described above, the air passage formed by the first to fourth air passages 29 to 35 is formed inside the door 7. The outside air sucked by the fan 17 flows along the air passage in the fan case 19, and cools the substrate 15 and the like.

As described above, the heating cooker 1 of the present invention includes the heating chamber 5 having the opening 3b, and the door 7 openably and closably covering the opening 3b of the heating chamber 5. The door 7 includes: an outer frame 13; a radio wave leakage prevention plate 25 mounted on the rear side of the outer frame 13; an inner frame 27 that sandwiches the radio wave leakage prevention plate 25 together with the outer frame 13; and an air inlet 13a provided at a lower portion of the outer frame 13 and taking in external air. Further, the door 7 includes: a substrate 15 mounted on the outer frame 13; a fan 17 mounted on the outer frame 13; and a first air passage 29 from the fan 17 to the substrate 15. The fan 17 is disposed forward of the radio wave leakage prevention plate 25. At least a part of the fan 17 is disposed inside the radio wave leakage prevention plate 25 as viewed from the rear. Further, the suction direction of the inlet 17a of the fan 17 is arranged in a direction intersecting the inlet 13a of the frame 13, and this direction is the front-rear direction of the door 7 in the upright state. The discharge direction of the discharge port 17b of the fan 17 is arranged in a direction intersecting the suction direction of the fan.

According to the structure of the heating cooker 1, the following effects can be obtained.

First, the heating cooker 1 of the present invention is arranged so that the suction direction 17b of the suction port 17a and the discharge direction of the discharge port 17b of the fan 17 are different. This changes the direction of the outside air to be taken in, for example, the orthogonal direction, and therefore the taking in of the outside air can be mitigated. As a result, for example, steam discharged from another cooking device such as a rice cooker disposed below the heating cooking device 1 or a boiler can be prevented from entering the heating cooking device 1. Further, a part of the fan 17 is disposed inside the radio wave leakage prevention plate 25. This can shorten the height of the door 7. As a result, the heating cooker 1 can be downsized.

The heating cooker 1 of the present invention includes a fan case 19 covering the fan 17 and the base plate 15, and the outer frame 13 includes a groove 13b formed by a first partition wall 13c and a second partition wall 13d constituting partition walls inside. The first air passage 29 is formed by the groove 13b of the outer frame 13 and the fan housing 19. That is, the fan housing 19 and the groove 13b of the outer frame 13 form a first air passage 29 constituting an air passage from the fan 17 to the board 15. Therefore, the external air sucked through the air inlet 13a of the outer frame 13 is appropriately sent to the substrate 15. This allows the substrate 15 to be efficiently cooled by the outside air.

Further, the fan housing 19 of the heating cooker 1 of the present invention has a hole 19a constituting a through hole formed behind the groove 13b of the outer frame 13, and the second air passage 31 reaching the rear surface of the fan housing 19 from the hole 19a through the fan 17 is formed by the groove 13b of the outer frame 13 and the fan housing 19. That is, the fan case 19 is formed with a hole 19a constituting a through hole. This forms the second air passage 31 constituting an air passage from the fan 17 through the hole 19a to the rear surface of the fan case 19. As a result, the rear surface of the fan housing 19 can be cooled efficiently.

Further, the fan housing 19 of the heating cooker 1 of the present invention includes: an upper hole 19b formed above the substrate 15; and a third air passage 33 extending from the base plate 15 to the rear surface of the fan housing 19 through the upper hole 19 b. That is, the third air passage 33 is formed, and the third air passage 33 constitutes an air passage through which the cooling air that cools the substrate 15 passes through the upper hole 19b of the fan case 19 and reaches the rear surface of the fan case 19. Thereby, the rear surface of the fan housing 19 can be cooled efficiently.

Further, the door 7 of the heating cooker 1 of the present invention includes: a first metal plate 21 constituting a metal plate covering at least a part of the rear side of the fan case 19; and a fourth air passage 35 between the rear surface of the fan case 19 and the front surface of the first metal plate 21. That is, the cooling air having passed through the 3 rd air passage 33 reaching the rear surface of the fan case 19 passes through the 4 th air passage 35 constituting an air passage between the rear surface of the fan case 19 and the first metal plate 21. Thereby, the first metal plate 21 is cooled. As a result, the heat insulating effect of the first metal plate 21 on the substrate 15 is further improved. Further, an air curtain is formed between fan case 19 and first metal plate 21 via fourth air passage 35. This allows the cooling air to absorb heat transferred to the first metal plate 21. As a result, the function of the first metal plate 21 as a heat shield plate is further improved, and heat transfer to the fan case 19 can be effectively reduced.

The substrate 15 of the heating cooker 1 of the present invention is equipped with a heating element that generates heat during operation, and the heating element is disposed in the first air passage 29. This allows the heat generating element to be efficiently cooled by the cooling air flowing through the first air passage 29.

In addition, by appropriately combining any of the various embodiments and modifications described above, the effects each has can be obtained.

The present invention has been fully described in connection with the preferred embodiments thereof with reference to the accompanying drawings, but various modifications and alterations will become apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims. Further, changes in the combination and order of elements in each embodiment may be made without departing from the scope and spirit of the invention.

As described above, the heating cooker according to the embodiment of the present invention includes the heating chamber having the opening, and the door openably and closably covering the opening of the heating chamber. The door is provided with: an outer frame; a wave leakage preventing plate installed at the rear side of the outer frame; an inner frame which sandwiches the radio wave leakage prevention plate together with the outer frame; and an air suction port arranged at the lower part of the outer frame and used for taking in the external air. Further, the door includes: a substrate mounted on the outer frame; a fan mounted on the outer frame; and a first air path from the fan to the substrate. The fan is disposed in front of the radio wave leakage prevention plate. At least a part of the fan is disposed inside the radio wave leakage prevention plate when viewed from the rear. The suction direction of the air inlet of the fan is arranged in a direction intersecting the air inlet of the frame, and the direction is the front-back direction of the door in the standing state. The discharge direction of the exhaust port of the fan is arranged in a direction intersecting the suction direction of the fan.

The fan case is provided to cover the fan and the substrate, and the outer frame has a groove formed by a partition wall inside. The first air passage may be formed by the groove of the outer frame and the fan casing.

The fan case may have a through hole formed behind the groove of the outer frame, and the second air passage extending from the fan to the rear surface of the fan case through the through hole may be formed by the groove of the outer frame and the fan case.

The fan case may include an upper hole formed above the substrate, and the door may include a third air passage extending from the substrate to the rear surface of the fan case through the upper hole.

The door may include a metal plate covering at least a part of the rear side of the fan casing, and a fourth air passage between the rear surface of the fan casing and the front surface of the metal plate.

In addition, a heating element that generates heat during operation may be mounted on the substrate, and the heating element may be disposed on the first air flow path.

Industrial applicability

The present invention can be used as a heating cooker such as a high-frequency heating cooker, a high-frequency heating cooker with a steam generator, a high-frequency heating cooker with a heater, and the like.

Description of the reference symbols

1: heating cooker

3 outer cover

3a front frame

3b opening

5 heating chamber

5a upper wall

5b, 5c side wall

5e bottom wall

7 door

9 display part

11 operating part

13 outer frame

13a, 17a, 19f air inlet

13b, 19m groove

13c first bulkhead (bulkhead)

13d second bulkhead (bulkhead)

13e rear wall

15 base plate

17 Fan

17b exhaust port

19 Fan case

19a hole (through hole)

19b upper hole

19c cover

19d wall

19e outer side wall

19g partition wall

19h hole

19k front wall

21 first metal plate (metal plate)

23 second metal plate (Metal plate)

25 electric wave leakage preventing plate

25a lower edge portion

27 inner frame

29 first wind path (wind path)

31 second wind path (wind path)

33 third wind path (wind path)

35 fourth air passage (duct).

Claims

1. A heating cooker is provided with:

a heating chamber having an opening; and

a door openably and closably covering the opening of the heating chamber;

the door is provided with:

an outer frame;

a radio wave leakage prevention plate installed at a rear side of the outer frame;

an inner frame that sandwiches the radio wave leakage prevention plate together with the outer frame;

an air inlet which is provided at the lower part of the outer frame and takes in external air;

a substrate mounted to the outer frame;

a fan mounted to the outer frame; and

a first air path from the fan to the substrate,

the fan is arranged at a position forward of the electric wave leakage prevention plate,

at least a part of the fan is arranged inside the radio wave leakage prevention plate when viewed from the rear,

the suction direction of the air inlet of the fan is arranged in the direction crossing the air inlet of the outer frame, the direction is the front and back direction of the door in the vertical state,

the discharge direction of the exhaust port of the fan is arranged in a direction intersecting the suction direction of the fan.

2. The heating cooker according to claim 1,

the heating cooker comprises a fan housing covering the fan and the base plate,

the outer frame has a groove formed by a partition wall inside,

the first air passage is formed by the groove of the outer frame and the fan case.

3. The heating cooker according to claim 2,

the fan housing has a through hole formed at the rear of the groove of the outer frame,

a second air passage from the fan to the rear surface of the fan case through the through hole is formed by the groove of the outer frame and the fan case.

4. The heating cooker according to claim 2 or 3,

the fan housing has an upper hole formed above the base plate,

the door has a 3 rd air path from the base plate to the rear surface of the fan housing through the upper hole.

5. The heating cooker according to claim 3 or 4,

the door is provided with:

a metal plate covering at least a portion of a rear side of the fan housing; and

and a 4 th air path between the rear surface of the fan case and the front surface of the metal plate.

6. The heating cooker according to any one of claims 1 to 5,

the substrate is provided with a heating element which generates heat during operation,

the heating element is disposed on the first air passage.