CN216135698U - Multifunctional cooking device - Google Patents

Abstract

The utility model relates to a multifunctional cooking device, which comprises a base assembly, a frying basket assembly arranged in the base assembly, an upper cover assembly which can be covered on the outer side of the frying basket assembly in an opening and closing manner, and a heating assembly which is arranged in the base assembly and is positioned on the lower side of the frying basket assembly. According to the utility model, the heating assembly is arranged below the pot body, so that the gravity center of the whole pot can be reduced, and the stability is improved. On the basis of the structure that the heating assembly is arranged below, the structure of the frying basket assembly is optimized, so that the frying basket assembly can be matched with the heating assembly for air frying or frying cooking, and the effect of one machine with multiple purposes is achieved. In addition, the structure of the upper cover assembly is simplified, the transparent window is arranged on the upper cover assembly, so that a user can conveniently observe the food cooking process, and the use experience of the user is improved.

Description

Multifunctional cooking device

Technical Field

The present invention relates to a multifunctional cooking apparatus capable of realizing air-frying and frying.

Background

At present, electric appliances for kitchens, such as an electric cooker, an air fryer, an oven, a frying pan and the like, are available in the market, and generally have single functions, so that diversified cooking requirements of users are difficult to meet. If a user wants to realize multiple food processing modes, the user needs to consume money to add multiple sets of kitchen appliances and occupy more kitchen space, and the idle rate of the kitchen appliances with only a single function is higher, so that the purchasing desire of the consumer is restricted.

Therefore, multifunctional cooking is an important development direction of the kitchen appliance. In the prior art, an air fryer is used as a structural foundation, and a heating device is additionally arranged below a pot body to realize the effect of multifunctional cooking. This kind of multi-functional cooking device utilizes the air on the upper cover subassembly to fry the subassembly and generate hot-blast air and fry the culinary art to food, and the heating element that recycles the setting in pot body below directly realizes stewing and frying and cooks to the pot body contact heating.

However, this kind of multifunctional cooking device will include the air of heating tube, hot-blast fan, motor, cooling fan isotructure and fry the subassembly and set up in the upper cover subassembly, and this can lead to the complete machine head and feet light, the focus leans on, stability is not good, still can make upper cover subassembly inner structure complicated, is difficult to observe the effect that food cooked through setting up the transparent window. In addition, the air fryer assembly disposed in the upper cover assembly and the heating assembly disposed below the pot body both rely on the heat generation of the heating pipes, and the two heating pipes one above the other overlap in function and each require multiple parts to cooperate with, which results in structural redundancy in the multifunctional cooking apparatus and increased manufacturing costs.

SUMMERY OF THE UTILITY MODEL

In view of the above, the utility model provides a multifunctional cooking device, which reduces the center of gravity of the whole cooking device and improves the stability by arranging the heating assembly below the pot body; the structure of the frying basket assembly is optimized, so that the frying basket assembly can be matched with the heating assembly to fry food in the frying basket assembly in air or fry the food, and the effect of one machine with multiple purposes is achieved; still come convenience of customers to the observation of food culinary art process through the structure of simplifying the upper cover subassembly and set up the transparent window, improve user's use and experience.

In one aspect of the present invention, there is provided a multifunctional cooking apparatus including:

a base assembly;

a fry basket assembly placed inside the base assembly, a cooking space being formed inside;

the upper cover assembly is arranged outside the cooking space of the frying basket assembly in an openable and closable manner; and

and the heating component is arranged in the base component and positioned at the lower side of the frying basket component, and can be used for carrying out air frying heating or frying heating on food in the frying basket component.

Preferably, the fry basket assembly comprises:

the side wall of the frying basket body is provided with a plurality of first ventilation holes, and the bottom of the frying basket body is provided with second ventilation holes;

the fan cover is of a cup-shaped structure, the opening of the fan cover is downwards covered above the second ventilation hole, and the side wall of the fan cover is provided with a plurality of third ventilation holes; and

culinary art frame, detachably sets up the inside of frying the basket body, its bottom is equipped with and supplies the fan housing passes the hole of stepping down.

Preferably, the bottom of the cooking hob is spaced from the bottom of the fry basket body, the fry basket body comprising:

and the flange extends upwards along the edge of the second vent hole, and the height of the flange is smaller than the distance between the lower end of the first vent hole and the bottom of the fry basket body.

Preferably, the fry basket body is provided with a first step structure extending outwards between the flange and the bottom of the fry basket body, the lower end of the fan housing is provided with a second step structure extending outwards, and the first step structure and the second step structure are matched with each other so that the lower end of the fan housing is arranged on the outer side of the flange in a surrounding manner.

Preferably, the second step structure comprises a first step surface parallel to the bottom surface of the basket body, a third step structure which is retracted is arranged between the bottom and the side wall of the basket body, the third step structure comprises a second step surface parallel to the bottom surface of the basket body, and the distance between the first step surface and the second step surface is the same as the distance between the second step surface and the bottom surface of the basket body, so that the cooking rack is erected on the first step surface and the second step surface.

Preferably, the cooking rack includes a baking tray, the upper surface of the baking tray gradually inclines outwards with the receding hole as a center, and the baking tray includes:

and the oil deflector ring surrounds the outer side of the abdicating hole and extends upwards from the upper surface of the baking tray.

Preferably, the baking tray further comprises:

the plurality of convex ribs are arranged on the upper surface of the baking tray in an upward convex manner and are arranged in a diffusion manner by taking the abdicating hole as the center;

wherein the height of each rib is gradually reduced outwards from the abdicating hole, and the height of one end of each rib close to the abdicating hole is not higher than that of the oil slinger.

Preferably, the cooking hob includes a partition, the partition including:

the first framework is arranged at the edge of the abdicating hole in a surrounding manner;

the second framework is arranged at the edge of the partition board in a surrounding manner; and

a mesh plate connected between the first skeleton and the second skeleton.

Preferably, the sidewall of the basket body is inclined outwardly from the bottom, the cooking hob further comprises:

the handles are arranged on the upper side of the outer edge of the cooking rack in pairs and are vertical to the bottom of the basket body.

Preferably, the upper cover assembly is provided with a transparent window for observing the cooking space, the base assembly is internally provided with a heat shield, the edge of the side wall of the basket body is provided with an outward extending mounting edge in a surrounding manner, and when the mounting edge is erected on the upper side of the heat shield, the heat shield and the side wall of the basket body are arranged at intervals;

the heating assembly includes:

-a heating tube;

-a hot air fan arranged below the heating tube;

-a motor arranged below the hot blast fan for driving the hot blast fan in rotation;

-a cooling fan arranged between the heat shield and the motor and driven by the motor; and

-a duct provided outside the hot blast fan and the cooling fan, communicating the hot blast fan and the cooling fan to the outside air from both sides of the heat shield, respectively;

wherein the heat shield is hermetically disposed between the motor and the hot wind fan.

Therefore, the heating assembly is arranged below the pot body, so that the gravity center of the whole pot is reduced, and the stability is improved; the structure of the frying basket assembly is optimized, so that the frying basket assembly is matched with the heating assembly to fry or fry food in the frying basket assembly in air, and the effect of one machine with multiple purposes is achieved; still come convenience of customers to the observation of food culinary art process through the structure of simplifying the upper cover subassembly and set up the transparent window, improve user's use and experience.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter, and not limit the subject matter.

FIG. 1 is a perspective view of a basket body of the multi-functional cooking apparatus of the present invention;

FIG. 2 is a schematic cross-sectional view of a basket body of the multi-functional cooking apparatus of the present invention;

FIG. 3 is a schematic perspective view of a baking tray in the multifunctional cooking device of the present invention;

FIG. 4 is a schematic cross-sectional view of a baking tray in the multifunctional cooking device of the present invention;

FIG. 5 is a schematic perspective view of a partition plate of the multifunctional cooking apparatus according to the present invention;

FIG. 6 is a schematic sectional view illustrating a partition plate of the multifunctional cooking apparatus according to the present invention;

fig. 7 is a schematic sectional view showing a cooking state of the multifunctional cooking apparatus according to the present invention;

fig. 8 is a schematic perspective view of the multifunctional cooking device of the present invention in a frying cooking state;

FIG. 9 is a schematic cross-sectional view of the multifunctional cooking device of the present invention in an air-fry cooking state;

fig. 10 is a schematic perspective view of the multifunctional cooking device of the present invention in an air-fry cooking state.

Description of reference numerals:

1-a fry basket body; 11-a first vent; 12-a second vent hole; 13-flanging; 14-a first stepped structure; 15-a third step structure; 151-second step surface; 16-mounting edges;

2-wind cover; 21-a third vent hole; 22-a second stepped structure; 221-a first step surface;

3-a cooking rack; 31-a relief hole; 32-baking trays; 321-an oil slinger; 322-convex ribs; 33-a separator; 331-a first scaffold; 332-a second backbone; 333-mesh plate; 34-a handle;

4-a base assembly; 41-heat shield;

5-an upper cover assembly;

6-a heating assembly; 61-heating tube; 62-a hot air fan; 63-a motor; 64-a cooling fan; 65-air duct.

Detailed Description

Various exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is not intended to limit the utility model, its application, or uses. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments should be construed as merely exemplary, and not as limiting, unless otherwise specifically stated.

As shown in fig. 1 to 10, the present invention provides a multi-functional cooking apparatus capable of performing multi-functional cooking of frying food and air-frying, which mainly comprises a base assembly 4, a basket assembly provided in the base assembly 4, a cover assembly 5 rotatably coupled to the base assembly 4, and a heating assembly 6 provided inside the base assembly 4 and located at the lower side of the basket assembly.

Conventional air fryers typically have the heating assembly 6 disposed within the upper lid assembly and on the upper side of the fry basket assembly. In order to reduce the gravity center of the whole machine and improve the stability, the heating assembly 6 with larger mass is arranged at the lower side of the frying basket assembly. In order to avoid the obstruction of the hot air of the heating assembly by the bottom of the fry basket assembly and to affect the air circulation effect during air fry cooking, the present invention optimizes the structure of the fry basket assembly from the air circulation perspective, as shown in fig. 1-2.

The basket assembly of the present invention utilizes a plurality of vent holes formed in the basket body 1 and the fan housing 2 to rationally organize the internal hot air circulation. Specifically, a plurality of first vent holes 11 are formed in the side wall of the fry basket body 1, a second vent hole 12 is formed in the bottom of the fry basket body, the cup-shaped fan cover 2 is covered above the second vent hole 12 in a downward opening mode, and a plurality of third vent holes 21 are formed in the side wall of the fan cover.

Thus, with reference to fig. 7 and 9, the hot air generated from the lower side of the basket body 1 passes through the first vent hole 11 in the side wall of the basket body 1, the third vent hole 21 in the side wall of the fan housing 2, and the second vent hole 12 in the bottom of the basket body 1 in this order, and the first hot air circulation is completed. For the first hot air circulation, the hot air fan 62 of the heating assembly 6 preferably uses radial-flow fan blades, so as to drive the hot air to flow to the outside of the sidewall of the basket body 1 in the radial direction of the hot air fan 62, and then the hot air in the second vent hole 12 is sucked back to the hot air fan 62 again by the central air intake effect of the upper side of the hot air fan 62.

Of course, the hot air may also pass through the second vent hole 12, the third vent hole 21 and the first vent hole 11 in sequence to complete the second hot air circulation, and for the second hot air circulation, the hot air fan 62 needs to adopt an axial flow fan blade to guide the air to flow upward to the second vent hole 12 first.

The first hot air circulation and the second hot air circulation have opposite hot air flowing directions, but in both hot air circulation modes, hot air needs to flow between the side wall of the basket body 1 and the side wall of the fan cover 2, so that the hot air traverses the inside of the basket body 1 to bring more uniform and sufficient air frying effect to food.

Whether air-fried or fried, the food will be separated out of a large amount of grease during cooking, and the grease mixed with the food residue will splash around at high temperature, so that the cleaning difficulty of the frying basket assembly by the user is increased. In this regard, the present invention also optimizes the structure of the fry basket assembly from a cleaning standpoint.

The detachable cooking rack 3 is placed in the fry basket body 1, the air cover 2 can pass through the abdicating hole 31 is arranged on the cooking rack 3, and the cooking rack 3 can be placed above the bottom of the fry basket body 1 and is arranged at an interval with the bottom of the fry basket body 1. From this, the space between culinary art frame 3 and the fried basket body 1 will be as the oil storage space of collecting unnecessary grease, makes the user can carry out centralized processing to grease and residue in the fried basket body 1 when clean, has reduced clear degree of difficulty.

In order to prevent the grease collected between the cooking rack 3 and the basket body 1 from flowing out of the second vent hole 12 at the bottom of the basket body 1, the basket body 1 comprises a flange 13, and the flange 13 extends upwards along the edge of the second vent hole 12 and can block the grease from flowing out of the second vent hole 12 downwards. The height of the flange 13 is smaller than the distance between the lower end of the first vent hole 11 and the bottom of the basket body 1, so that the air blown into the basket body 1 from the first vent hole 11 is higher than the flange 13 in the horizontal direction, and the grease in the basket body 1 is prevented from being blown to cross the flange 13 and drip downwards from the second vent hole 12 in the circulation process of hot air from the first vent hole 11 to the third vent hole 21.

In order to stably support the cooking rack 3 above the bottom of the basket body 1 and to be spaced from the bottom of the basket body 1, the basket body 1 is provided with a first step structure 14 extending outward between the flange 13 and the bottom of the basket body 1, and the basket body 1 is provided with a third step structure 15 extending inward between the bottom and the side wall. The first step surface 221 parallel to the bottom surface of the basket body 1 in the first step structure 14 and the second step surface 151 parallel to the bottom surface of the basket body 1 in the third step structure 15 have the same distance from the bottom surface of the basket body 1, so that the cooking racks 3 lapped on the first step surface 221 and the second step surface 151 are parallel to the bottom of the basket body 1, the cooking racks 3 are stably placed on the first step surface 221 and the second step surface 151, and the situations of shaking, inclining and the like are not easy to occur in the cooking process.

Further, on the basis of the first step structure 14 provided on the fry basket body 1, in order to enable the wind shield 2 to be closely covered on the upper side of the second vent hole 12, the lower end of the wind shield 2 is provided with a second step structure 22 which is expanded outward, and the first step structure 14 and the second step structure 22 are matched with each other so that the lower end of the wind shield 2 is circumferentially arranged on the outer side of the flange 13.

In addition, the present invention optimizes the structure of the fry basket assembly from a multi-functional standpoint. To meet the air-and fry cooking requirements of the multi-function cooking apparatus, the cooking rack 3 in the fry basket assembly may alternatively include a grill pan 32 to handle frying and a partition 33 to handle air-frying.

As shown in fig. 3 to 4, the grill pan 32 is surrounded by an oil retainer 321 extending upward from the upper surface of the grill pan 32 outside the relief hole 31 with the relief hole 31 as the center, so that the grease is prevented from flowing from the relief hole 31 to the surface of the hood 2 and then dropping from the third vent hole 21 to the outside of the basket body 1. The upper surface of the grill plate 32 is inclined outward and downward with the relief hole 31 as a center, and grease deposited from food can be guided to flow outward without being excessively gathered around the slinger 321.

In a preferred embodiment, to optimize the mouth feel of the food during frying, especially for meat foods, to avoid a too greasy mouth feel, the present invention provides a plurality of ribs 322 projecting upwardly from the upper surface of the grill plate 32. Through the supporting effect of the ribs 322 on the food, the grease separated out from the food drops into the groove areas between the ribs 322 and is not contacted with the food any more, so that the phenomenon that the food is fried in the grease for a long time to cause the over-greasy taste is avoided.

In another preferred embodiment, the ribs 322 are arranged in a diverging manner with the offset holes 31 as the center, and the height of each rib 322 gradually decreases from the offset holes 31 to make the grease on the rib 322 flow outward with the offset holes 31 as the center. In addition, the height of the end of the rib 322 close to the relief hole 31 is not higher than the height of the oil slinger 321, so that the grease in the area of the rib 322 close to the oil slinger 321 is not easy to flow or splash into the oil slinger 321.

As shown in fig. 5 to 6, the partition 33 mainly includes a first frame 331 circumferentially disposed at an edge of the escape hole 31, a second frame 332 circumferentially disposed at an edge of the partition 33, and a mesh plate 333 connected between the first frame 331 and the second frame 332.

The first frame 331 and the second frame 332 can increase the strength of the partition 33, and the partition 33 with a hollow structure can utilize the gap between the partition 33 and the bottom of the basket body 1 to allow hot air to pass through the partition 33 and air-fry food from the lower side, so as to improve cooking uniformity, and solve the technical problem that the conventional air fryer easily generates 'the food exposed at the upper part is mature, even burnt and stacked at the lower part is still half-cooked'.

As shown in fig. 8 and 10, in order to facilitate the user to take and put the cooking racks 3 from the inside of the basket body 1, the side walls of the basket body 1 are inclined outwards from the bottom, and the handles 34 of the cooking racks 3 are arranged in pairs on the upper side of the outer edge of the cooking racks 3 and are perpendicular to the bottom of the basket body 1, so that a space for gripping is formed between the side walls of the basket body 1 and the handles 34, and the risk of scalding the user is reduced.

As shown in fig. 7-10, since the heating unit 6 is disposed below the basket assembly and the heating unit 6 can perform air-frying and frying heating, no heating device is required in the lid assembly 5, so that the structure of the lid assembly 5 is simplified. In view of this, in a preferred embodiment, the lid assembly 5 may be made of a transparent material or have a transparent window to facilitate the user's observation of the cooking status of the food within the fry basket assembly.

Inside the base assembly 4, a cooking space is formed by a heat shield 41 that houses the fry basket assembly, which is closed by the lid assembly 5, having a higher temperature during cooking. The fry basket body 1 is erected on the upper side of the heat shield 41 through the mounting edge 16 extending outwards at the edge of the side wall, and at the moment, the heat shield 41 and the side wall of the fry basket body 1 are arranged at intervals, so that the phenomenon that the temperature of the heat shield 41 is too high due to the contact heat conduction of the fry basket body 1 to the heat shield 41 can be avoided.

The heating assembly 6 is capable of air-fry heating or fry heating the food within the fry basket assembly. In order to perform the air-frying function, the heating unit 6 includes a heating duct 61, a hot air fan 62 disposed below the heating duct 61, and a motor 63 disposed below the hot air fan 62 and driving the hot air fan 62 to rotate. The hot air fan 62 blows air heated by the heating duct 61 to the surface of the food to perform air-fry cooking, driven by the motor 63. In order to realize the frying function, the upper heating pipe 61 heats the basket body 1 and the grill pan 32, thereby realizing the frying of food. Further, during the frying process, the hot air fan 62 may also be turned on to circulate hot air, thereby allowing the food to have both air-fried and fried flavors.

In order to prevent the temperature of the area where the motor 63 is located from being too high, the multifunctional cooking apparatus of the present invention provides the heat shield 41 between the motor 63 and the hot air fan 62 to insulate the heat transferred from the air to the motor 63. On the basis, the multifunctional cooking device is also provided with a cooling fan 64 driven by the motor 63 between the heat insulation cover 41 and the motor 63, and air ducts 65 respectively communicating the cooling fan 64 with the outside air are arranged outside the cooling fan 64, so that the hot air in the area where the motor 63 is located is timely discharged out of the interior of the multifunctional cooking device by using the cold air fan, and the motor 63 works in a good temperature environment.

In a preferred embodiment, the air duct 65 is provided outside the hot air fan 62 and the cooling fan 64 to communicate the hot air fan 62 and the cooling fan 64 to the outside air from both sides of the heat shield 41, respectively, thereby preventing hot air of high temperature of the cooking space from intruding into an area where the motor 63 is located while discharging surplus heat in the cooking space.

So far, some specific embodiments of the present invention have been described in detail by way of examples, but it should be understood by those skilled in the art that the above examples are only for illustrative purposes and are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (10)

1. A multifunctional cooking device, comprising:

a base assembly (4);

a fry basket assembly placed inside the base assembly (4) and internally formed with a cooking space;

an upper cover assembly (5) which can be opened and closed and is arranged outside the cooking space of the frying basket assembly; and

and the heating assembly (6) is arranged in the base assembly (4) and positioned at the lower side of the frying basket assembly, and can be used for carrying out air frying heating or frying heating on food in the frying basket assembly.

2. The multi-functional cooking device of claim 1, wherein the fry basket assembly comprises:

the side wall of the frying basket body (1) is provided with a plurality of first ventilation holes (11), and the bottom of the frying basket body is provided with second ventilation holes (12);

the fan cover (2) is of a cup-shaped structure, the opening of the fan cover is downwards covered above the second ventilation hole (12), and the side wall of the fan cover is provided with a plurality of third ventilation holes (21); and

culinary art frame (3), detachably sets up the inside of frying basket body (1), its bottom is equipped with and supplies fan housing (2) pass hole of stepping down (31).

3. Multifunctional cooking device according to claim 2, characterized in that the bottom of said cooking hob (3) is arranged spaced from the bottom of said basket body (1), said basket body (1) further comprising:

and the flanging (13) extends upwards along the edge of the second vent hole (12), and the height of the flanging (13) is smaller than the distance between the lower end of the first vent hole (11) and the bottom of the basket body (1).

4. Multifunctional cooking device according to claim 3, characterized in that the fry basket body (1) is provided with a first step structure (14) that is flared between the flange (13) and the bottom of the fry basket body (1), the lower end of the hood (2) is provided with a second step structure (22) that is flared, and the first step structure (14) and the second step structure (22) cooperate with each other such that the lower end of the hood (2) is circumferentially arranged outside the flange (13).

5. The multifunctional cooking device according to claim 4, wherein the second step structure (22) comprises a first step surface (221) parallel to the bottom surface of the basket body (1), the basket body (1) is provided with a third step structure (15) that is recessed between the bottom and the side wall, the third step structure (15) comprises a second step surface (151) parallel to the bottom surface of the basket body (1), and the first step surface (221) and the second step surface (151) are spaced apart from the bottom surface of the basket body (1) at the same interval so that the cooking rack (3) is rested on the first step surface (221) and the second step surface (151).

6. The multifunctional cooking device according to claim 2, wherein the cooking rack (3) includes a grill pan (32), an upper surface of the grill pan (32) is gradually inclined downward outward centering on the relief hole (31), and the grill pan (32) includes:

and the oil deflector ring (321) surrounds the outside of the receding hole (31) and extends upwards from the upper surface of the baking tray (32).

7. The multifunctional cooking device according to claim 6, wherein the grill pan (32) further comprises:

the plurality of convex ribs (322) are arranged on the upper surface of the baking tray (32) in an upward protruding manner and are arranged in a diffusion manner by taking the abdicating hole (31) as the center;

wherein the height of each rib (322) is gradually reduced from the receding hole (31) outwards, and the height of one end of the rib (322) close to the receding hole (31) is not higher than the height of the oil slinger (321).

8. Multifunctional cooking device according to claim 2, characterized in that said cooking hob (3) comprises a partition (33), said partition (33) comprising:

a first skeleton (331) circumferentially arranged at the edge of the abdicating hole (31);

a second frame (332) circumferentially disposed on an edge of the partition (33); and

a mesh plate (333) connected between the first skeleton (331) and the second skeleton (332).

9. Multifunctional cooking device according to claim 2, characterized in that the side walls of said basket body (1) are inclined outwards from the bottom, said cooking hob (3) further comprising:

the handles (34) are arranged in pairs on the upper side of the outer edge of the cooking rack (3) and are vertical to the bottom of the basket body (1).

10. The multifunctional cooking device as claimed in claim 2, wherein the upper cover assembly (5) is provided with a transparent window for observing the cooking space, the base assembly (4) is internally provided with a heat shield (41), the rim of the sidewall of the basket body (1) is circumferentially provided with an outwardly extending mounting rim (16), and the heat shield (41) is spaced apart from the sidewall of the basket body (1) when the mounting rim (16) is overlapped on the upper side of the heat shield (41);

the heating assembly (6) comprises:

-a heating tube (61);

-a hot air fan (62) arranged below the heating pipe (61);

-a motor (63) arranged below the hot blast fan (62) for driving the hot blast fan (62) in rotation;

-a cooling fan (64) arranged between the heat shield (41) and the motor (63) and driven by the motor (63); and

-a wind tunnel (65) provided outside the hot blast fan (62) and the cooling fan (64) to communicate the hot blast fan (62) and the cooling fan (64) to the outside air from both sides of the heat shield (41), respectively;

wherein the heat shield (41) is hermetically disposed between the motor (63) and the hot air fan (62).

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