JP3715466B2 - Cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooking device that heats and circulates hot air.
[0002]
[Prior art]
Conventionally, in this kind of heating cooker, what was comprised as shown in FIG. 6 is provided. In this case, an inner box 2 is disposed inside the outer box 1, and a cooking chamber 3 is formed by the inner box 2. In the back wall of the cooking chamber 3 (inner box 2), a large number of ventilation holes 4 and 5 are divided into a central part (ventilation hole 4) and a peripheral part (ventilation hole 5), and behind that, A heater 6 and a hot air fan 7 are disposed. The heater 6 and the hot air fan 7 are covered with a casing 8 attached to the back surface of the cooking chamber 3, and the casing 8 is covered with a casing cover 9 attached to the back surface of the cooking chamber 3.
[0003]
A motor attachment plate 10 is attached to the back of the casing cover 9, and a hot air motor 11 is attached to the back of the motor attachment plate 10. The rotating shaft 11a of the hot air motor 11 is inserted in advance into the casing 8 from the motor mounting plate 10 through the casing cover 9 and the inner wall of the casing 8, and the above-described hot air fan 7 is attached to the tip portion thereof. .
Further, a cooling fan 12 is mounted on the rotary shaft 11a of the hot air motor 11 so as to be located in the motor mounting plate 10, and a back plate 13 mounted on the outer box 1 on the rear side of the hot air motor 11. Covered by.
[0004]
With this configuration, the heater 6 generates heat and the hot air motor 11 is activated, so that the hot air fan 7 sucks the air in the cooking chamber 3 from the vent hole 4 in the center as shown by the arrow. Circulation is performed by contacting the heater 6 and returning it from the surrounding vent hole 5 into the cooking chamber 3. Accordingly, hot air is circulated and supplied into the cooking chamber 3, and heating cooking with hot air is performed in the cooking chamber 3.
The cooling fan 12 moves the air behind the casing cover 9 to cool the vicinity and the hot air motor 11.
[0005]
[Problems to be solved by the invention]
In the case of the above conventional one, the heater 6 and the hot air fan 7 are disposed behind the back wall of the cooking chamber 3, the cooling fan 12 is disposed behind the heater 6, and the hot air motor 11 is disposed behind the heater 6. As a result, the overall depth becomes large, and there has been a restriction on the place where it cannot be placed in a place where there is no room in the depth direction.
[0006]
Moreover, in this case, although the hot air motor 11 and the components in the vicinity thereof are cooled by the cooling fan 12, they are affected by high heat of about 400 ° C. in the casing 8 where the heater 6 is located. Because of this, it is necessary to separate the heater 6 portion from the hot air motor 11 portion as much as possible, and the distance is secured in the depth direction, so that the overall depth is further increased. .
[0007]
This invention is made | formed in view of the above-mentioned situation, Therefore Therefore The objective is to provide the heating cooker which can make the whole depth small.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, in the heating cooker of the present invention,
  A cooking chamber with a vent hole in the back wall;
  A heater disposed behind the back wall of the cooking chamber;
  A hot air fan that is arranged behind the back wall of the cooking chamber and circulates the air in the cooking chamber in contact with the heater through the ventilation holes and returns to the cooking chamber;
  A motor for hot air disposed in the back of the operation panel side portion outside the cooking chamber;
  A transmission mechanism is provided between the hot air motor and the hot air fan, and transmits the rotational power of the hot air motor to the hot air fan.,
  A cooling fan is provided on the hot air motor side transmission vehicle of the transmission mechanism, and a casing that covers the cooling fan is provided, and the cooling fan and the casing draw in air from the hot air motor side to transmit the hot air fan side transmission of the transmission mechanism. So that it ’s blowing in the direction of the car.(Invention of claim 1).
[0009]
  According to this, the hot air motor does not exist behind the back wall of the cooking chamber, and is located at the back of the operation panel side part outside the cooking chamber, so that it is disposed behind the back wall of the cooking chamber. The number of parts is reduced, and the entire depth can be reduced accordingly.
  Also, in this case, the hot air motor moves away from the heater to the side of the circumference, making it less susceptible to the high heat generated by the heater. There is no need to ensure this, which makes it possible to further reduce the overall depth.
  Further, as described above, the portion of the hot air motor that is separated from the heater in the circumferential direction is a lower temperature portion than the portion behind the conventional heater, and at this position, the hot air of the transmission mechanism is sucked from the hot air motor side. By blowing air in the direction of the fan-side transmission vehicle, the hot air motor is effectively cooled, and the transmission mechanism is also effectively cooled. The cooling of the part of the component disposed behind the rear wall of the head is also effectively performed. Thereby, it becomes possible to further reduce the distance in the depth direction of the parts arranged behind the back wall of the cooking chamber, and it is possible to bring the back plate closer to the back of the cooking chamber, so that the entire depth Can be further reduced.
[0012]
  In this case, there is a ventilation port through which the air sent by the cooling fan and the casing is passed to the cooking chamber side between the hot air fan mounting portion to which the hot air fan is mounted and the hot air motor mounting portion to which the hot air motor is mounted. (Claims)2Invention).
  In this case, the cooling air is introduced into the parts near the heater among the parts arranged behind the back wall of the cooking chamber by the ventilation opening so that the cooling can be performed more effectively. Become.
[0013]
  The hot air fan mounting portion and the hot air motor mounting portion are provided on one mounting plate, and the mounting plate has a stepped shape having a hot air motor mounting portion in front of the hot air fan mounting portion. Ventilation openings may be formed in the3Invention).
  In this case, the cooling air is more effectively taken into the parts near the heater, and the cooling of the air becomes more effective.
[0014]
  Furthermore, it is good to provide the baffle wall which guides the wind sent by the cooling fan and the casing to the cooking chamber side at the edge part of the ventilation opening.4Invention).
  Even in this case, the cooling air is more effectively taken into the parts near the heater, and the cooling of the air becomes more effective.
[0015]
  In addition, the ventilation opening may face the back of the casing cover that covers the casing that covers the hot-air fan.5Invention).
  In this case, the cooling air flows smoothly along the casing cover after passing through the ventilation port, and this also makes it possible to more effectively cool the parts near the heater.
[0016]
  The hot air fan mounting portion may be provided with a wind guide wall along an intermediate member between the hot air motor side transmission vehicle and the hot air fan side transmission vehicle of the transmission mechanism.6Invention).
  In this case, the cooling air flows along the intermediate member of the transmission mechanism, and the intermediate member is effectively cooled, and also efficiently guided to the portion that is heated by the high heat generated by the heater, and the cooling is performed. It will be done effectively.
[0017]
  Both the hot air fan mounting portion and the hot air motor mounting portion are preferably mounted on the upper and lower portions of the rear surface of the cooking chamber.7Invention).
  In this case, by attaching the hot air fan mounting part and the hot air motor mounting part to a common member called the back of the cooking chamber, it is possible to mount them with less assembly error than attaching them to separate members. The rotation power can be stably transmitted from the motor to the hot air fan, and the entire depth can be reduced more accurately.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment in which the present invention is applied to a cooking device having a microwave oven function will be described with reference to FIGS.
First, FIG. 1 shows a configuration of the entire heating cooker. An inner box 22 is disposed inside an outer box 21, and a cooking chamber 23 is surrounded by the inner box 22.
The cooking chamber 23 (inner box 22) has an opening on the front surface (not shown), and a front plate 24 having an opening (also not shown) matching this opening as an entrance / exit. 22 is attached to the front edge of the front panel 24. A door 25 for opening and closing the opening as an entrance is pivotally attached to the front plate 24, and an operation panel 26 is mounted on the side (right side in the figure). ing.
[0021]
The operation panel 26 is for a user to perform an operation necessary for cooking with a heating cooker from the front, and has various operation units (not shown). The door 25 has a hinge at the lower end, and has a handle 27 at the upper end.
On the other hand, a large number of ventilation holes 28, 29 are formed in the inner wall of the cooking chamber 23 by punching, for example, and the ventilation holes 28 are located in the center and the ventilation holes 29 are located in the peripheral part. .
[0022]
A heater 30 and a hot air fan 31 are disposed behind the back wall of the cooking chamber 23, and the heater 30 is located in the peripheral portion, and the hot air fan 31 is located in the center side. In this case, for example, an annular sheathed heater is used as the heater 30, and a centrifugal fan is used as the hot air fan 31. The heater 30 and the hot air fan 31 are covered with a first casing 32 attached to the back surface of the cooking chamber 23, and the first casing 32 is further covered with a casing cover 33 attached to the back surface of the cooking chamber 23. ing.
[0023]
A mounting plate 34 is disposed behind the casing cover 33. As shown in FIG. 2, the mounting plate 34 has a first mounting portion 35 and a second mounting portion 36 arranged side by side at a step portion 37. It is made of a single metal plate that is integrated and integrated. As shown in FIGS. 1 and 3, the hot air fan 31 is rotatably attached to the first attachment portion 35 via a shaft 39 of the first attachment portion 35. Is attached to the first attachment portion 35 with a screw 41 via a fixing plate 40.
[0024]
In addition, a hot air motor 42 is attached to the second attachment portion 36 via a motor base 43. In this case, the motor base 43 is attached to the first attachment portion 35 with screws 44, and the motor base 43 is attached to the motor base 43. A hot air motor 42 is attached by screws 45.
Accordingly, the first mounting portion 35 is a hot air fan mounting portion, and the second mounting portion 36 is a hot air motor mounting portion.
[0025]
The first mounting portion 35 has a hole 46 through which the shaft 38 passes, and the second mounting portion 36 has a hole 48 through which the rotation shaft 47 of the hot air motor 42 passes. Yes. Further, the shaft 38 passes through the center of each back wall of the first casing 32 and the casing cover 33.
[0026]
Furthermore, as shown in FIG. 2, flanges 49 and 50 are formed on the upper and lower parts of the first mounting part 35 and the second mounting part 36, respectively, and the flanges 49 and 50 have mounting holes. 51 and 52 are formed, and the first mounting portion 35 and the second mounting portion 36 are both attached to the upper and lower portions of the back surface of the cooking chamber 23 by screws 53 shown in FIG. ing.
[0027]
In this case, the first attachment portion 35 and the second attachment portion 36 are attached to the flanges 54 and 55 provided for the attachment of the first casing 32 and the casing cover 33 to the back surface of the cooking chamber 23. Further, the flanges 49 and 50 are overlapped from the rear.
As a result, the second mounting portion 36 is located on the side of the first mounting portion 35 (on the operation panel 26 side) and in front of it, and accordingly, the hot air motor 42 is also installed. It is located in the back of the operation panel 26 side part outside the cooking chamber 23.
[0028]
A transmission mechanism 56 is provided between the hot-air motor 42 and the hot-air fan 31. In this case, the transmission mechanism 56 is located behind the second mounting portion 36 and is a rotating shaft 47 of the hot-air motor 42. A driving pulley 57 that is a hot-air motor-side transmission vehicle attached to a hot-air fan, a driven pulley 58 that is located behind the first mounting portion 35 and is attached to the shaft 38 of the hot-air fan 31, and a driven pulley 58 It is a belt transmission mechanism comprising a belt 59 as an intermediate member stretched between both pulleys 57 and 58, and the hot air fan passes through the driving power pulley 57, the belt 59 and the driven pulley 58 in order by the rotational power of the hot air motor 42. 31 to tell.
[0029]
In addition, a first cooling fan 60 is integrally provided on the front side of the driving pulley 57, for example, and a centrifugal fan is also used for the first cooling fan 60. A second casing 61 that covers the first cooling fan 60 is attached to the second attachment portion 36. The second casing 61 has a spiral chamber shape as shown in FIG. 4, and has a notch 63 in which the driving pulley 57 is positioned and a discharge port 63 directed in the direction of the driven pulley 58. Yes. Further, the suction port for the discharge port 63 is a hole 48 of the second mounting portion 36 through the rotary shaft 47 of the hot air motor 42. For this reason, the hole 48 rotates as shown in FIG. The diameter is sufficiently larger than the shaft 47.
[0030]
Further, a ventilation hole 64 is formed between the first attachment part 35 and the second attachment part 36. In this case, the ventilation hole 64 is a step portion of the attachment plate 34 in detail in this case. The step portion 37 extends from the step portion 37 to the first attachment portion 35 and the second attachment portion 36. The ventilation port 64 faces the back surface of the casing cover 33 that covers the first casing 32.
[0031]
In addition, a first air guide wall 65 directed rearward and in the direction of the first cooling fan 60 is provided at an edge portion of the ventilation port 64, particularly an edge portion on the hot air fan 31 side, for example, the ventilation port 64. It is provided by cutting and raising together with the formation of. The second mounting portion 36 is provided with a second air guide wall 66. The second air guide wall 66 is positioned above the belt 59 of the transmission mechanism 56 as shown in FIG. Then, it is also provided by cutting and raising along the belt 59, and its projecting dimension is such that its rear end is located behind the belt 59 as shown in FIG.
[0032]
Here, the hot air motor 42 has a double shaft shape in which the rotary shaft 47 projects both forward and backward, and a drive pulley 57 of the transmission mechanism 56 is attached to a rear end portion thereof, while a front end portion is provided. Is attached with a second cooling fan 67. The second cooling fan 67 is located in the machine room 68 between the outer box 21 and the inner box 22 on the back side of the operation panel 26, and the machine room 68 is shown in FIG. As described above, necessary electrical components such as a magnetron 69 and a transformer 70 are provided.
[0033]
The magnetron 69 is a microwave oscillator that oscillates the microwave supplied into the cooking chamber 23 for cooking in the microwave oven, the transformer 70 performs a transformation required for the operation thereof, and the second cooling fan 67 is By cooling the machine room 68, these electrical components are cooled. In this case, an axial fan is used as the second cooling fan 67.
A large number of air holes 72 and 73 are formed in the side plate and the bottom of the outer box 21 and the back plate 71 located behind the transmission mechanism 56 and closing the opening on the back of the outer box 21. ing.
[0034]
Next, the operation of the above configuration will be described.
When oven cooking is started by the user operating the operation panel 26, the heater 30 generates heat and the hot air motor 42 is activated. The rotational power of the hot air motor 42 is transmitted to the hot air fan 31 by the transmission mechanism 56, and the hot air fan 31 is rotationally driven. 1 and 3, the driven hot air fan 31 draws the air in the cooking chamber 23 from the central ventilation hole 28 and makes it contact the heater 30, and the surrounding ventilation is performed. Circulation returning from the hole 29 into the cooking chamber 23 is performed. Thus, hot air is circulated and supplied into the cooking chamber 23, and heating cooking (oven cooking) using hot air is performed in the cooking chamber 23.
[0035]
At this time, the first cooling fan 60 is rotated integrally with the drive-side pulley 57 of the transmission mechanism 56, and the driven first cooling fan 60 cooperates with the second casing 61. 3, the air is sucked from the hot air motor 42 side through the hole 48 of the second mounting portion 36 of the mounting plate 34 and blown in the direction of the driven pulley 58 of the transmission mechanism 56, as indicated by a broken line arrow 3.
[0036]
The sent air flows along the back surface of the mounting plate 34, reaches the bearing 39, the shaft 38, and the driven pulley 58, flows further forward, and from the ventilation port 64 to the front surface of the mounting plate 34. It is taken into the side (cooking chamber 23 side) and flows through the rear side of the casing cover 33, similarly reaches the bearing 39 and the shaft 38, and further flows further forward. At this time, the first air guide wall 65 effectively introduces the wind into the cooking chamber 23 side. The second air guide wall 66 allows the wind to flow along the belt 59 of the transmission mechanism 56. As a result, the hot-air motor 42 is cooled, and the driving pulley 57, the belt 59, and the driven pulley 58 of the transmission mechanism 56 are cooled, and are further heated by the high heat generated by the heater 30. The bearing 39, the shaft 38, the casing cover 33, and the back plate 71 are cooled.
[0037]
Further, at this time, the second cooling fan 67 is rotated together with the first cooling fan 60 by the hot air motor 42, and the driven second cooling fan 67 is indicated by a two-dot chain arrow in FIG. Then, the hot air motor 42 and the machine room 68 (electrical parts in the machine room 68) are cooled by sucking air from the hot air motor 42 side and blowing it forward in the machine room 68.
[0038]
Thus, in this configuration, the hot air motor 42 does not exist behind the back wall of the cooking chamber 23 but is located in the back of the operation panel 26 side portion outside the cooking chamber 23, thereby The parts disposed behind the back wall of the cooking chamber 23 can be reduced as compared with the conventional one, and the entire depth can be reduced correspondingly, and the restrictions on the place of placement can be reduced. In addition, in this case, the back side of the operation panel 26 is generally a machine room 68, which is a portion having a relatively large space, and the space described above is effectively used to reduce the overall depth described above. Can do.
[0039]
Further, in this case, the hot air motor 42 is separated from the heater 30 in the circumferential direction and is not easily affected by the high heat generated by the heater 30, so the first casing 32 disposed behind the back wall of the cooking chamber 23 The parts such as the casing cover 33 and the mounting plate 34 do not need to have a large distance in the depth direction, and the overall depth can be further reduced.
[0040]
Furthermore, in this case, if the dimensions to the rear end of the above-mentioned parts disposed behind the back wall of the cooking chamber 23 are kept equal to the dimensions to the rear end of the same parts as those of the prior art, those parts It is possible to increase the depth of the cooking chamber 23 as much as it is not necessary to ensure a large distance in the depth direction of the parts, so that more or larger items to be cooked can be cooked by heating. Become.
[0041]
Further, as described above, the portion of the hot air motor 42 that is separated from the heater 30 in the circumferential direction is a lower temperature portion than the portion behind the conventional heater, and at this position, the first cooling fan 60 and the second cooling fan 60 are provided. The casing 61 sucks air from the hot air motor 42 side and blows air toward the driven pulley 58 of the transmission mechanism 56, thereby effectively cooling the hot air motor 42 and effectively cooling the transmission mechanism 56. In addition, it is possible to effectively cool a portion that is heated by the high heat generated by the heater 30 (part portion disposed behind the back wall of the cooking chamber 23).
[0042]
As a result, the distance in the depth direction of the components disposed behind the back wall of the cooking chamber 23 can be further reduced, and the back plate 71 can be brought closer to the back surface of the cooking chamber 23. Thus, the overall depth can be further reduced (as an example, it can be shortened by 40 [mm] or more than the conventional one). Further, in this case, the portion that becomes hot due to the high heat generated by the heater 30 can be effectively cooled, so that the cooking temperature can be increased, thereby increasing the speed of heating and cooking. You can also improve the condition of the.
[0043]
In addition, a ventilation port 64 is provided between the first attachment portion 35 to which the hot air fan 31 is attached and the second attachment portion 36 to which the hot air motor 42 is attached. Since the wind sent out by the cooling fan 60 and the second casing 61 is allowed to pass to the cooking chamber 23 side, the cooling air is a heater among the parts disposed behind the back wall of the cooking chamber 23. It can be incorporated into a part near 30 to cool it more effectively.
[0044]
Further, in this case, the first mounting portion 35 and the second mounting portion 36 may be formed of separate members, but in the above configuration, they are provided on one mounting plate 34 and this mounting is performed. The plate 34 has a stepped shape in which the second mounting portion 36 exists in front of the first mounting portion 35, and the ventilation port 64 is formed in the step portion, so that the cooling air described above can be supplied to the vicinity of the heater 30. It can be incorporated more effectively into the component part and it can be cooled more effectively. Further, in this case, the step of the mounting plate 34 is effective for shortening the entire depth.
[0045]
In addition, a first air guide wall 65 is provided at the edge of the air vent 64, thereby guiding the wind sent out by the first cooling fan 60 and the second casing 61 to the cooking chamber 23 side. Therefore, the above-described cooling air can be more effectively taken into the parts near the heater 30 and the cooling can be more effectively performed.
[0046]
The ventilation port 64 faces the back surface of the casing cover 33 that covers the first casing 32 that covers the hot air fan 31, so that the cooling air that has passed through the ventilation port 64 flows along the casing cover 33. Flowing smoothly, the cooling of the parts near the heater 30 can be performed more effectively.
[0047]
Further, the second mounting portion 36 is provided with a second air guide wall 66 along the belt 59 of the transmission mechanism 56, whereby the cooling air flows along the belt 59. In addition to being able to perform effectively, the cooling air can be efficiently guided to the portion that is heated by the high heat generated by the heater 30, and the cooling can be performed effectively. Further, in this case, since the external force from the rear or the upper side can be prevented from hitting the second wind guide wall 66 before reaching the belt 59, the belt 59 can be protected from the external force. 66.
[0048]
In addition, the first attachment portion 35 and the second attachment portion 36 are both attached to the upper and lower portions of the back surface of the cooking chamber 23, and thus are attached separately to the common member called the back surface of the cooking chamber 23. As a result, it is possible to mount them with less assembling error, and to stabilize the transmission of the rotational power from the hot air motor 42 to the hot air fan 31, and to reduce the overall depth. I can do it well.
[0049]
Further, the hot air motor 42 has a double shaft shape, a drive side pulley 57 of the transmission mechanism 56 is attached to one side of the rotating shaft 47, and the second cooling for cooling the machine room 68 on the back side of the operation panel 26 on the other side. Since the fan 67 is attached, the hot air motor 42 can cool down the machine room 68, and can further enhance the cooling of the hot air motor 42 itself.
[0050]
On the other hand, FIG. 5 shows a second embodiment of the present invention. The same parts as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted, and only different parts are described.
In this case, in place of the second cooling fan 67, a second cooling fan 81 is disposed in front of the hot air motor 42, and another motor 82 for rotationally driving the cooling fan 81 is disposed. ing.
[0051]
This other motor 82 is an outer rotor type DC brushless motor in which a rotor 85 is supported on the outer periphery of a stator 84 fixed to a frame 83, and a cooling fan 81 is integrally provided on the rotor 85. As thin as. Even in such a configuration, the cooling fan 81 sucks air from the hot air motor 42 side and blows it forward in the machine room 68 as indicated by a two-dot chain line arrow. The cooling of the hot air motor 42 can also be effectively performed.
[0052]
In addition, the transmission mechanism 56 is not limited to the belt transmission mechanism, and may be, for example, a chain transmission mechanism or a gear transmission mechanism. Moreover, the microwave function may not necessarily be provided. Furthermore, the operation panel 26 may be provided below or above the side of the front surface of the cooking chamber 23, and accordingly, the hot air motor 42 is also provided below or above the cooking chamber 23. May be.
[0053]
【The invention's effect】
  The present invention is as described above and has the following effects.
  According to the cooking device of claim 1, the hot air motor does not exist behind the back wall of the cooking chamber, and is located in the back of the operation panel side portion outside the cooking chamber, thereby reducing the overall depth. It is possible to reduce the restrictions on the location.Moreover, the distance in the depth direction of the parts arranged behind the back wall of the cooking chamber can be further reduced by effectively cooling the hot air motor from the transmission mechanism and the portion that is heated by the high heat generated by the heater. Furthermore, the back plate can be brought closer to the back of the cooking chamber, and the overall depth can be further reduced.
[0055]
  Claim2According to the heating cooker, the cooling air is supplied from the vent hole between the hot air fan mounting portion and the hot air motor mounting portion to the part near the heater in the part of the component disposed behind the back wall of the cooking chamber. It can be incorporated into the component part and it can be cooled more effectively.
[0056]
  Claim3According to the heating cooker, the cooling air is more effectively applied to the parts near the heater from the air vent provided in the step portion of one mounting plate having the hot air fan mounting portion and the hot air motor mounting portion. And cooling it more effectively.
[0057]
  Claim4According to the heating cooker, the cooling air can be more effectively taken into the parts near the heater by the air guide wall provided at the edge of the vent hole, and the cooling of the air can be more effectively performed. It can be carried out.
  Claim5According to this heating cooker, the cooling air that has passed through the ventilation port can be smoothly flowed along the casing cover, so that the parts near the heater can be cooled more effectively.
[0058]
  Claim6According to this heating cooker, the cooling air can be caused to flow along the intermediate member of the transmission mechanism at the air guide wall provided in the hot air motor mounting portion, thereby cooling the intermediate member and the high heat generated by the heater. In this way, it is possible to effectively cool the portion that is heated.
[0059]
  Claim7According to the heating cooker, the mounting of the hot air fan mounting portion and the hot air motor mounting portion can be reduced in assembly error, the rotation power can be stably transmitted from the hot air motor to the hot air fan, and the entire depth can be reduced. It can be made small with high accuracy.The
[Brief description of the drawings]
FIG. 1 is an overall cross-sectional view showing a first embodiment of the present invention.
FIG. 2 is a perspective view of a mounting plate alone.
FIG. 3 is an enlarged cross-sectional view of the main part.
FIG. 4 is a rear view of the main part.
FIG. 5 is a view corresponding to FIG. 3 showing a second embodiment of the present invention.
6 is a reduced view corresponding to FIG. 1 showing a conventional example.
[Explanation of symbols]
Reference numeral 23 is a cooking chamber, 26 is an operation panel, 28 and 29 are ventilation holes, 30 is a heater, 31 is a hot air fan, 32 is a first casing (casing), 33 is a casing cover, 34 is a mounting plate, and 35 is a first plate Mounting portion (hot air fan mounting portion), 36 is a second mounting portion (hot air motor mounting portion), 37 is a stepped portion, 42 is a hot air motor, 47 is a rotating shaft, 56 is a transmission mechanism, and 57 is a driving side. Pulley (hot air fan side transmission vehicle), 58 is driven pulley (hot air motor side transmission vehicle), 59 is a belt (intermediate member), 60 is a first cooling fan (cooling fan), 61 is a second casing ( Casing), 64 is a vent hole, 65 is a first air guide wall (air guide wall), 66 is a second air guide wall (air guide wall), 67 is a second cooling fan (cooling fan), and 68 is Machine room, 81 is a second cooling fan (cooling fan), 82 is a motor It is shown.

Claims (7)

A cooking chamber with a vent hole in the back wall;
A heater disposed behind the back wall of the cooking chamber;
A hot air fan that is arranged behind the back wall of the cooking chamber and circulates the air in the cooking chamber in contact with the heater through the ventilation holes and returns to the cooking chamber;
A motor for hot air disposed in the back of the operation panel side portion outside the cooking chamber;
A transmission mechanism provided between the hot air motor and the hot air fan, and transmitting the rotational power of the hot air motor to the hot air fan ;
A cooling fan is provided on the hot air motor side transmission vehicle of the transmission mechanism, and a casing that covers the cooling fan is provided, and the cooling fan and the casing draw in air from the hot air motor side to transmit the hot air fan side transmission of the transmission mechanism. A cooking device characterized by being blown in the direction of the car . Between the hot air fan mounting portion to which the hot air fan is mounted and the hot air motor mounting portion to which the hot air motor is mounted, there is a ventilation port through which the air sent by the cooling fan and the casing is passed to the cooking chamber side. The cooking device according to claim 1. The hot air fan mounting portion and the hot air motor mounting portion are provided on one mounting plate, and the mounting plate has a stepped shape having a hot air motor mounting portion in front of the hot air fan mounting portion, and ventilates the step portion. The cooking device according to claim 2, wherein a mouth is formed . The cooking device according to claim 2 or 3, wherein an air guide wall is provided at an edge of the ventilation opening to guide the air sent by the cooling fan and the casing to the cooking chamber side . The cooking device according to claim 2 or 3 , wherein the ventilation port faces a back surface of a casing cover that covers the casing that covers the hot air fan . The cooking device according to claim 2 or 3 , wherein the hot air fan mounting portion is provided with a wind guide wall along an intermediate member between the hot air motor side transmission vehicle and the hot air fan side transmission vehicle of the transmission mechanism . . The cooking device according to claim 2 or 3 , wherein both the hot air fan mounting portion and the hot air motor mounting portion are mounted on the upper and lower portions of the back surface of the cooking chamber .

Images