CN221285455U - Cooling system and cooking appliance with same - Google Patents

Abstract

The utility model discloses a heat dissipation system and a cooking appliance with the same. The heat dissipation system comprises a heat dissipation air duct, a fan and a flow guide channel, wherein the heat dissipation air duct is provided with an air inlet and an air outlet, the fan is used for driving air in the heat dissipation air duct to flow from the air inlet to the air outlet, the flow guide channel is provided with a steam inlet and a steam outlet, the steam inlet is used for being communicated with a cooking cavity of the cooking appliance, the steam outlet is communicated with the heat dissipation air duct, and the steam outlet is positioned at the downstream of the fan along the flowing direction of air in the heat dissipation air duct. The heat radiation system is characterized in that the steam exhaust port is arranged at the downstream of the fan along the flow direction of the air in the heat radiation air duct, so that steam and oil stains are not easy to adhere to the fan in the blowing-out process, the erosion to the fan is reduced, and the service life of the fan is prolonged.

Description

Cooling system and cooking appliance with same

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a heat dissipation system and a cooking appliance with the same.

Background

In related art, in a heat dissipation system of a cooking appliance, such as a steaming oven, steam and baked oil stains in a cavity of the cooking appliance are blown out by an air duct by a fan to dissipate heat. However, during the process of blowing out the air duct, steam and oil stains often pass through the fan impeller and easily erode the fan impeller, thereby shortening the service life of the fan.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the heat dissipation system, and the steam outlet is arranged at the downstream of the fan along the flowing direction of the air in the heat dissipation air duct, so that steam and oil stains are not easy to adhere to the fan in the blowing-out process, the corrosion to the fan is reduced, and the service life of the fan is prolonged.

The utility model also aims to provide the cooking electric appliance with the heat dissipation system.

According to an embodiment of the first aspect of the utility model, a heat dissipation system comprises a heat dissipation air duct, a fan and a flow guide channel, wherein the heat dissipation air duct is provided with an air inlet and an air outlet, the fan is used for driving air in the heat dissipation air duct to flow from the air inlet to the air outlet, the flow guide channel is provided with a steam inlet and a steam outlet, the steam inlet is used for being communicated with a cooking cavity of a cooking appliance, the steam outlet is communicated with the heat dissipation air duct, and the steam outlet is positioned at the downstream of the fan along the flow direction of air in the heat dissipation air duct.

According to the heat radiation system, the steam outlet is arranged at the downstream of the fan along the flowing direction of the gas in the heat radiation air duct, so that steam or baked greasy dirt enters the heat radiation air duct from the steam outlet and does not pass through the fan, and therefore the steam or baked greasy dirt is not easy to adhere to the fan, corrosion to the fan is reduced, and the service life of the fan is prolonged.

According to some embodiments of the utility model, the heat dissipation air duct comprises a first air duct and a second air duct which are arranged above the cooking cavity and are mutually communicated, the first air duct is communicated with the air inlet, the second air duct is communicated with the air outlet, and the fan is arranged at the joint of the first air duct and the second air duct.

According to some embodiments of the utility model, the first air duct and the second air duct are located on the same side of the fan in a vertical direction, and the first air duct is located below the second air duct.

According to some embodiments of the utility model, the heat dissipation air duct is provided with an air duct bottom plate, an air duct partition plate and an air duct top plate which are arranged at intervals from bottom to top, wherein a first air duct is formed between the air duct bottom plate and the air duct partition plate, and a second air duct is formed between the air duct partition plate and the air duct top plate.

According to some embodiments of the utility model, the first air duct and the second air duct are located on two sides of the fan respectively along the horizontal direction.

According to some embodiments of the utility model, the first air duct is surrounded by a first air duct upper plate and a first air duct lower plate arranged at intervals in the vertical direction, and the second air duct is surrounded by a second air duct upper plate and a second air duct lower plate arranged at intervals in the vertical direction.

According to some embodiments of the utility model, the device further comprises a valve, wherein the valve is arranged in the diversion channel to control the opening and closing of the diversion channel.

According to some embodiments of the utility model, the heat dissipation air duct further comprises a door air duct arranged in the door body of the cooking electric appliance, the door air duct is communicated with the first air duct, and an opening is arranged at the bottom of the door body and serves as an air inlet.

According to some embodiments of the utility model, the heat sink further comprises a heat absorbing member, wherein the heat absorbing member is located on the heat dissipation air duct, is located in the flowing direction of the gas in the heat dissipation air duct, and is located between the fan and the steam exhaust port.

According to some embodiments of the utility model, the heat absorbing member is a plurality of heat absorbing fins arranged at intervals along the width direction of the heat dissipation air duct.

According to some embodiments of the utility model, the fan comprises a fan blade and a motor, wherein the fan blade is positioned in the heat dissipation air duct, and the motor is positioned outside the heat dissipation air duct and is in driving connection with the fan blade.

The cooking appliance according to the embodiment of the second aspect of the utility model comprises the heat dissipation system in the embodiment.

According to the cooking appliance provided by the embodiment of the utility model, the service life of the heat dissipation system can be prolonged by adopting the heat dissipation system in the embodiment, and the service life of the cooking appliance is further prolonged.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic diagram of one embodiment of a heat dissipation system according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of another embodiment of a heat dissipation system according to an embodiment of the present utility model;

Fig. 3 is an angular cross-sectional view of a cooking appliance according to an embodiment of the present utility model;

Fig. 4 is another angular sectional view of a cooking appliance according to an embodiment of the present utility model;

Fig. 5 is an enlarged view at a in fig. 4.

Reference numerals:

A heat dissipation system 100,

The heat dissipation air duct 10, the air inlet 10a, the air outlet 10b, the first air duct 11, the first air duct upper plate 111, the first air duct lower plate 112, the second air duct 12, the second air duct upper plate 121, the second air duct lower plate 122, the air duct bottom plate 13, the air duct partition 14, the air duct top plate 15, the door air duct 16,

Fan 20, fan blade 21, motor 22, casing 23,

A diversion channel 30, a steam inlet 30a, a steam outlet 30b,

Valve 40, connecting joint 41, sealing ring 42,

A heat absorbing member 50, a condensing plate 60, a condensing chamber 60a,

Cooking appliance 1000, shell 200, door 300, cooking cavity 1000a.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

The following describes a heat dissipation system 100 and a cooking appliance 1000 having the same according to an embodiment of the present utility model with reference to the accompanying drawings.

Referring to fig. 1 and 2, a heat dissipation system 100 according to an embodiment of the first aspect of the present utility model includes a heat dissipation air duct 10, a fan 20, and a flow guiding channel 30, the heat dissipation air duct 10 has an air inlet 10a and an air outlet 10b, the fan 20 is used for driving air in the heat dissipation air duct 10 to flow from the air inlet 10a to the air outlet 10b, the flow guiding channel 30 has a steam inlet 30a and a steam outlet 30b, the steam inlet 30a is used for communicating with a cooking cavity 1000a of a cooking appliance 1000, the steam outlet 30b is communicated with the heat dissipation air duct 10, and the steam outlet 30b is located downstream of the fan 20 along the flow direction of the air in the heat dissipation air duct 10.

Specifically, referring to fig. 1 and 2, a heat dissipation system 100 in an embodiment of the present utility model includes a heat dissipation air duct 10, the heat dissipation air duct 10 having an air inlet 10a and an air outlet 10b, and cold air can enter the heat dissipation air duct 10 through the air inlet 10a, absorb heat, and then be blown out through the air outlet 10b, thereby carrying out heat. The fan 20 is used for driving air in the heat dissipation air duct 10 to flow from the air inlet 10a to the air outlet 10b, so that cold air can continuously enter the heat dissipation channel from the air inlet 10a, and continuous heat dissipation is realized. The blower 20 may be disposed between the air inlet 10a, the air outlet 10b, or the air inlet 10a and the air outlet 10b along the flow direction of the air. The flow guide channel 30 has a steam inlet 30a and a steam outlet 30b, and the steam inlet 30a is used for communicating with the cooking cavity 1000a of the cooking appliance 1000, and the steam outlet 30b is communicated with the heat dissipation air duct 10, so that the cooking cavity 1000a of the cooking appliance 1000 is communicated with the heat dissipation air duct 10 through the flow guide channel 30, steam in the cooking cavity 1000a of the cooking appliance 1000 can enter the heat dissipation air duct 10 through the flow guide channel 30 and be discharged from the air outlet 10b through the driving of the fan 20, and the discharge rate of the steam is improved. The steam discharge port 30b is located downstream of the blower 20 in the flow direction of the air in the heat radiation air duct 10. Thus, after steam or baked oil stains enter the heat dissipation air duct 10 from the steam exhaust port 30b, the steam flows to the air outlet 10b from the downstream of the fan 20 and cannot pass through the fan 20, so that the steam or baked oil stains are not easy to adhere to the fan 20, corrosion to the fan 20 is reduced, and the service life of the fan 20 is prolonged.

Thus, referring to fig. 1 and 2, according to the heat dissipation system 100 of the present utility model, the exhaust port 30b is disposed at the downstream of the fan in the flow direction of the air in the heat dissipation air duct 10, so that the steam or the baked oil stain enters the heat dissipation air duct 10 from the exhaust port 30b and does not pass through the fan 20, and therefore, the steam or the baked oil stain is not easy to adhere to the fan 20, thereby reducing the erosion to the fan 20 and prolonging the service life of the fan 20. In some embodiments of the present utility model, referring to fig. 1,2 and 3, the heat dissipation air duct 10 includes a first air duct 11 and a second air duct 12 disposed above the cooking cavity 1000a and communicating with each other, the first air duct 11 communicates with the air inlet 10a, the second air duct 12 communicates with the air outlet 10b, and the blower 20 is disposed at the junction of the first air duct 11 and the second air duct 12.

In view of saving the transverse space of a kitchen and facilitating operation and maintenance, the electric control part of the cooking appliance 1000 is generally arranged above the cooking cavity 1000a, so that the heat dissipation air duct 10 is arranged above the cooking cavity 1000a, heat dissipation can be performed on the electric control part, the working temperature of the electric control part is reduced, the use safety of the cooking appliance 1000 is improved, and meanwhile, the service life of the electric control part is prolonged.

The first air duct 11 is communicated with the air inlet 10a to serve as an air inlet duct, and the second air duct 12 is communicated with the air outlet 10b to serve as an air outlet duct. The fan 20 is disposed at the junction of the first air duct 11 and the second air duct 12, so as to suck cold air into the first air duct 11 from the air inlet 10a, absorb heat in the first air duct 11 and the second air duct 12, and then blow out from the air outlet 10b to take away heat.

It is understood that the heat dissipation duct 10 may be disposed under, left side, right side, rear side, etc. of the cooking cavity 1000 a. The first air duct 11 may extend along a straight line or may extend along a curved line.

In the present utility model, the fan 20 drives the air to flow from the air inlet 10a to the air outlet 10b, so that the second air duct 12 forms a negative pressure, so as to drain the steam in the cooking cavity 1000a of the cooking appliance 1000, and the steam flows out from the flow guiding channel 30. In some embodiments of the present utility model, referring to fig. 1 and 3, the first air duct 11 and the second air duct 12 are located on the same side of the blower 20 in the vertical direction, and the first air duct 11 is located below the second air duct 12.

Through setting up first wind channel 11 and second wind channel 12 in the homonymy of fan 20, be convenient for with air intake 10a and air outlet 10b set up in the homonymy of fan 20, in order to be convenient for inhale cold wind, air intake 10a sets up in the one side towards outside, like this, can set up air outlet 10b in the one side towards outside, be convenient for exhaust.

Since the density will be reduced after the temperature of the air is increased, a part of fluid with small density will flow upward under the action of the buoyancy according to the physical general knowledge, and therefore, the hot air will flow upward, and therefore, the first air duct 11 is arranged below the second air duct 12, so that the hot air is discharged, and the power loss of the fan 20 is reduced.

In some embodiments of the present utility model, referring to fig. 1 and 3, the heat dissipation air duct 10 has an air duct bottom plate 13, an air duct partition 14 and an air duct top plate 15 that are disposed at intervals from bottom to top, wherein a first air duct 11 is formed between the air duct bottom plate 13 and the air duct partition 14, and a second air duct 12 is formed between the air duct partition 14 and the air duct top plate 15.

The air duct top plate 15 and the air duct bottom plate 13 are separated by the air duct partition plate 14, the second air duct 12 is formed with the air duct top plate 15 and the first air duct 11 is formed with the air duct bottom plate 13 respectively, the arrangement space of the heat dissipation air duct 10 is saved, the lengths of the first air duct 11 and the second air duct 12 can be prolonged, the heat dissipation efficiency is improved, meanwhile, plates required for arranging the heat dissipation air duct 10 are saved, and the production cost is reduced.

Of course, the present application is not limited thereto, and in other embodiments, the heat dissipation channel may further have a first bottom plate, a first top plate, a second bottom plate, and a second top plate that are disposed at intervals from bottom to top, where the first top plate and the first bottom plate form the first air duct 11, and the second bottom plate and the second top plate form the second air duct 12.

In some embodiments of the present utility model, referring to fig. 2, the first air duct 11 and the second air duct 12 are located at both sides of the blower 20, respectively, in a horizontal direction.

The first air duct 11 and the second air duct 12 are respectively arranged on two sides of the fan 20, so that the structure is simple and the arrangement is convenient. Specifically, the first air duct 11 and the second air duct 12 may be located at opposite sides of the blower 20, respectively, such that the first air duct 11 may be disposed at a side of the door 300 close to the cooking appliance 1000 to facilitate cold air intake, and the second air duct 12 may be disposed at a side of the door 300 facing away from the cooking appliance 1000 to be connected with an external ventilation duct to facilitate hot air outflow. Of course, the first air duct 11 and the second air duct 12 may be disposed at an angle in the horizontal direction.

In some embodiments of the present utility model, referring to fig. 2, the first air duct 11 is surrounded by a first air duct upper plate 111 and a first air duct lower plate 112 spaced apart in a vertical direction, and the second air duct 12 is surrounded by a second air duct upper plate 121 and a second air duct lower plate 122 spaced apart in a vertical direction. The first air duct 11 is surrounded by the first air duct upper plate 111 and the first air duct lower plate 112, so that after entering from the air inlet 10a, cold air enters the first air duct 11 surrounded by the first air duct upper plate 111 and the first air duct lower plate 112, then enters the second air duct 12 surrounded by the second air duct upper plate 121 and the second air duct lower plate 122, and finally flows out from the air outlet 10 b.

In some embodiments of the present utility model, referring to fig. 3, 4 and 5, a valve 40 is further included, where the valve 40 is disposed in the diversion channel 30 to control the opening and closing of the diversion channel 30. By arranging the valve 40 in the diversion channel 30, the valve 40 can control the opening and closing of the diversion channel 30, so that the diversion channel 30 can be opened or closed according to the cooking state. For example, the flow guide channel 30 may be closed in the early cooking stage, and the flow guide channel 30 may be opened in the late cooking stage or after the end of cooking.

Specifically, the valve 40 may be a ball valve, which may be controlled by a control module to control the opening and closing of the diversion channel 30 through rotation. Of course, the valve 40 is not limited thereto and other opening and closing members may be employed.

Further, a ball valve is installed at one end at the steam inlet 30a and at one end at the steam outlet 30b, and the ball valve is detachably connected with both the steam inlet 30a and the steam outlet 30b through a connection joint 41, specifically, the connection joint 41 is screwed with the ball valve. In order to improve the tightness of the steam inlet 30a and the steam outlet 30b, a sealing ring 42 is arranged between the connecting joint 41 and the steam inlet 30a and the steam outlet 30b, and the sealing ring 42 is sleeved on the connecting joint 41 and is abutted against one side of the steam outlet 30b away from the cooking cavity 1000a and one side of the steam inlet 30a facing the cooking cavity 1000 a.

Of course, the present application is not limited thereto, and in other embodiments, the valve 40 may be fixedly connected within the diversion channel 30, such as by welding or integrally molding.

In some embodiments of the present utility model, referring to fig. 1 and 3, the heat dissipation air duct 10 further includes a door air duct 16 disposed in the door 300 of the cooking appliance 1000, the door air duct 16 is in communication with the first air duct 11, and an opening is provided at the bottom of the door 300 as the air inlet 10a.

Through setting up the door body wind channel 16 that communicates with first wind channel 11, and the opening that the bottom of the door body 300 set up is as air intake 10a, like this, cold wind can get into by the air intake 10a that is located door body 300 bottom, gets into first wind channel 11 through door body wind channel 16, can take away the heat in the door body 300, like this, the user is difficult for being scalded by door body 300 when opening door body 300 after the culinary art is finished, simultaneously, reduces the temperature of door body 300, can protect door body 300, prolongs the life of door body 300.

Specifically, the door 300 includes a first door 300 panel and a second door 300 panel, and the first door 300 panel and the second door 300 panel enclose the door duct 16. Thus, the area of the cold air passing through the door 300 can be increased, and more temperature of the door 300 can be taken away.

Of course, the present application is not limited thereto, and in other embodiments, a ventilation duct may be provided in the door 300, and the ventilation duct may be one or more, and the ventilation duct may be a straight duct or a curved duct.

In some embodiments of the present utility model, referring to fig. 3, 4 and 5, the heat absorbing member 50 is further included, and the position of the heat absorbing member 50 on the heat dissipation duct 10 is located in the flow direction of the gas in the heat dissipation duct 10 and between the blower 20 and the steam exhaust port 30 b.

Through setting up heat absorbing member 50 in heat dissipation wind channel 10, can absorb the heat in the heat dissipation wind channel 10, and heat absorbing member 50 is located the flow direction of gas in heat dissipation wind channel 10, and be located between fan 20 and the exhaust port 30b, like this, when the gas that the temperature is less than heat absorbing member 50 temperature passes through heat absorbing member 50, can take away the temperature on the heat absorbing member 50 for the temperature of the gas that passes through the exhaust port 30b is higher, can reduce the moisture content of the steam that gets into by the exhaust port 30b, like this, air outlet 10b only air-out, reduce the corruption to air outlet 10b annex structure, the life of cooking appliance 1000 has been prolonged.

In some embodiments of the present utility model, referring to fig. 3, the heat absorbing member 50 is a plurality of heat absorbing fins spaced apart along the width direction of the heat dissipation duct 10. By providing the heat absorbing member 50 as a plurality of heat absorbing fins, the heat absorbing area can be increased, more heat can be absorbed conveniently, and at the same time, heat can be taken away conveniently by gas.

It will be appreciated that the number of heat absorbing fins may be set according to the width of the heat dissipation air duct 10, and the distance between the plurality of heat absorbing fins may be set according to the actual situation. The shape of the heat absorbing fin is not limited, and may be a regular shape, for example, a rectangle, a circle, or the like, or may be an irregular picture, or the like.

In some embodiments, referring to fig. 3, 4 and 5, the heat dissipation system 100 further includes a condensation plate 60, the condensation plate 60 and the top plate of the heat dissipation duct 10 enclose a condensation chamber 60a, the condensation chamber 60a has a condensation channel communicating with the cooking chamber 1000a, and steam enters the condensation chamber 60a through the condensation channel and is condensed into water by the condensation plate 60. The condensation chamber 60a also has a drain pipe connected to the water receiving box, from which condensate water enters the water receiving box. Specifically, the condensing plate 60 may be an inclined plate, and a side close to the water receiving box is lower than a side far from the water receiving box.

In some embodiments of the present utility model, referring to fig. 3, 4 and 5, the fan 20 includes a fan blade 21 and a motor 22, the fan blade 21 is located in the heat dissipation air duct 10, and the motor 22 is located outside the heat dissipation air duct 10 and is in driving connection with the fan blade 21. Through setting up fan blade 21 in heat dissipation wind channel 10, can drive the gaseous flow from air intake 10a to air outlet 10b in the heat dissipation wind channel 10, set up motor 22 outside heat dissipation wind channel 10, reduce the influence of the heat in the heat dissipation wind channel 10 to motor 22 normal operating, guaranteed the normal work of fan 20, protected motor 22, prolonged motor 22's life.

In some embodiments, the fan 20 further includes a housing 23, the housing 23 is in communication with the first air duct 11 and the second air duct 12, the fan blades 21 are disposed within the housing 23, and the motor 22 is disposed above the housing 23.

Referring to fig. 3, 4 and 5, a cooking appliance 1000 according to a second aspect of the present utility model includes the heat dissipation system 100 in the above-described embodiment.

According to the cooking appliance 1000 of the embodiment of the present utility model, by adopting the heat dissipation system 100 in the above embodiment, the service life of the heat dissipation system 100 can be prolonged, and the service life of the cooking appliance 1000 can be further prolonged.

Specifically, the cooking appliance 1000 may be an oven or the like.

In some embodiments, the cooking appliance 1000 includes a housing 200 having an opening at one side, and the door 300 is disposed at the opening and encloses a cooking cavity 1000a with the housing 200.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A heat dissipation system for dissipating heat from a cooking appliance, comprising:

The cooling air duct (10), the cooling air duct (10) is provided with an air inlet (10 a) and an air outlet (10 b);

The fan (20) is used for driving the air in the heat dissipation air duct (10) to flow from the air inlet (10 a) to the air outlet (10 b);

the cooking appliance comprises a flow guide channel (30), wherein the flow guide channel (30) is provided with a steam inlet (30 a) and a steam outlet (30 b), the steam inlet (30 a) is used for being communicated with a cooking cavity (1000 a) of the cooking appliance, the steam outlet (30 b) is communicated with the heat dissipation air duct (10), and the steam outlet (30 b) is positioned at the downstream of the fan (20) along the flow direction of gas in the heat dissipation air duct (10).

2. The heat dissipation system according to claim 1, wherein the heat dissipation air duct (10) comprises a first air duct (11) and a second air duct (12) which are arranged above the cooking cavity (1000 a) and are communicated with each other, the first air duct (11) is communicated with the air inlet (10 a), the second air duct (12) is communicated with the air outlet (10 b), and the fan (20) is arranged at the joint of the first air duct (11) and the second air duct (12).

3. The heat dissipation system according to claim 2, characterized in that the first air duct (11) and the second air duct (12) are located on the same side of the fan (20) in the vertical direction, and the first air duct (11) is located below the second air duct (12).

4. A heat dissipation system according to claim 3, wherein the heat dissipation air duct (10) has an air duct bottom plate (13), an air duct partition plate (14) and an air duct top plate (15) arranged at intervals from bottom to top, wherein the first air duct (11) is formed between the air duct bottom plate (13) and the air duct partition plate (14), and the second air duct (12) is formed between the air duct partition plate (14) and the air duct top plate (15).

5. The heat dissipation system according to claim 2, wherein the first air duct (11) and the second air duct (12) are located on both sides of the blower (20), respectively, in a horizontal direction.

6. The heat dissipation system according to claim 5, wherein the first air duct (11) is surrounded by a first air duct upper plate (111) and a first air duct lower plate (112) that are disposed at intervals in a vertical direction, and the second air duct (12) is surrounded by a second air duct upper plate (121) and a second air duct lower plate (122) that are disposed at intervals in the vertical direction.

7. The heat dissipation system according to any one of claims 1-6, further comprising a valve (40), the valve (40) being disposed within the flow channel (30) to control opening and closing of the flow channel (30).

8. The heat dissipation system according to claim 2, wherein the heat dissipation air duct (10) further comprises a door air duct (16) disposed in a door (300) of the cooking appliance, the door air duct (16) is communicated with the first air duct (11), and an opening is provided at a bottom of the door (300) as the air inlet (10 a).

9. The heat dissipation system according to any one of claims 1-6, further comprising a heat absorbing member (50), the position of the heat absorbing member (50) on the heat dissipation air duct (10) being located in the flow direction of the gas in the heat dissipation air duct (10) and between the blower (20) and the exhaust port (30 b).

10. The heat dissipation system according to claim 9, wherein the heat absorbing member (50) is a plurality of heat absorbing fins arranged at intervals in a width direction of the heat dissipation air duct (10).

11. The heat dissipation system according to any one of claims 1-6, wherein the fan (20) comprises:

the fan blades (21), the fan blades (21) are positioned in the heat dissipation air duct (10);

And the motor (22) is positioned outside the heat dissipation air duct (10) and is in driving connection with the fan blade (21).

12. A cooking appliance characterized in that it comprises a heat dissipation system (100) according to any one of claims 1-11.