Multi-cavity stacked air fryer

Abstract

The invention discloses a multi-cavity stacked air fryer. The multi-cavity stacked type air fryer comprises a main body and a frying basket, the main body comprises a shell, an air inlet, an air outlet, an air inlet and an air outlet, and ventilation holes are formed in the bottom wall of the shell; an upper cavity is defined by the upper inner shell assembly, and the upper inner shell assembly and the outer shell are arranged at an interval so as to form an upper heat dissipation channel; a lower cavity is defined by the lower inner shell assembly, and the lower inner shell assembly and the outer shell are arranged at an interval so as to form a lower heat dissipation channel; the upper hot air assembly is used for generating hot air into the upper cavity and comprises an upper heating piece and an upper fan; and the lower hot air assembly is used for generating hot air into the lower cavity and comprises a lower heating piece and a lower fan. The ventilation holes, the lower heat dissipation channel and the upper heat dissipation channel are sequentially communicated from bottom to top to form a convection heat dissipation channel, a cold air channel is further arranged between the upper inner shell assembly and the lower hot air assembly, the cold air channel is separated from the convection heat dissipation channel, and the cold air channel covers the lower draught fan and is provided with an air inlet communicated with the outer portion of the outer shell. And external cold air is guided to forcibly dissipate heat of the lower fan.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a multi-cavity stacked air fryer. Background Art

[0002] As consumers demand more versatility and space efficiency in kitchen appliances, multi-chamber air fryers have gradually become mainstream products on the market. Traditional single-chamber air fryers can only achieve a single cooking function, while dual-chamber or multi-chamber stacked designs can independently control multiple chambers to simultaneously complete the cooking of different ingredients, significantly improving equipment utilization. However, while the multi-chamber stacked structure improves functionality, it also brings technical challenges such as low heat dissipation efficiency and easy overheating of core components. At present, the heat dissipation structure design of multi-chamber air fryers in the existing technology is unreasonable, resulting in hot air backflow or mixing of hot and cold air flows, and low heat dissipation efficiency. Moreover, there is a particular problem of insufficient heat dissipation design for the lower chamber fan. In the existing technology, the lower chamber fan is usually directly exposed to a high temperature environment, lacks targeted cooling measures, and is prone to failure due to overheating.

[0003] Based on this, it is necessary to propose a technical solution to overcome the shortcomings of the existing technology. Summary of the Invention

[0004] In order to overcome the defects of the prior art, the present invention proposes a multi-cavity stacked air fryer, which can improve the heat dissipation performance.

[0005] The present invention is achieved through the following technical solution: a multi-cavity stacked air fryer, comprising a main body and a frying basket, wherein the main body has an upper chamber and a lower chamber arranged in a stacked manner, and the frying basket comprises an upper frying basket that can be pulled out and assembled in the upper chamber and a lower frying basket that can be pulled out and assembled in the lower chamber. The main body comprises: The housing has a bottom wall with ventilation holes formed on the bottom wall; An upper inner shell assembly is disposed in the outer shell, the upper inner shell assembly enclosing the upper chamber, and a distance is provided between the upper inner shell assembly and the outer shell to form an upper heat dissipation channel; A lower inner shell assembly is disposed in the outer shell, the lower inner shell assembly enclosing the lower chamber, and a distance is provided between the lower inner shell assembly and the outer shell to form a lower heat dissipation channel; an upper hot air assembly, for generating hot air into the upper chamber, comprising an upper heating element and an upper blower; and a lower hot air assembly, for generating hot air into the lower chamber, comprising a lower heating element and a lower fan; Among them, the ventilation holes, lower heat dissipation channel and upper heat dissipation channel are connected in sequence from bottom to top to form a convection heat dissipation channel. A cold air channel is also provided between the upper inner shell assembly and the lower hot air assembly. The cold air channel is separated from the convection heat dissipation channel. Its cover is provided above the lower fan and has an air inlet connected to the outside of the outer shell to guide external cold air to force heat dissipation of the lower fan.

[0006] As a further improved solution, the main body includes an upper support plate arranged between the upper inner shell assembly and the cold air channel, and the portion of the upper support plate extending beyond the upper inner shell assembly is provided with air flow holes; and / or, The main body includes a lower support plate arranged between the lower inner shell component and the bottom wall, and a portion of the lower support plate extending beyond the lower inner shell component is provided with an air flow hole.

[0007] As a further improved solution, the upper inner shell assembly includes an upper inner shell with an upper opening and an upper cover shell covering the upper opening of the upper inner shell, the upper heating element is arranged in the upper cover shell, and the upper fan has an upper heating fan blade located in the upper cover shell and above the upper heating element; The lower inner shell assembly includes a lower inner shell with an upper opening and a lower cover shell covering the upper opening of the lower inner shell. The lower heating element is arranged in the lower cover shell. The lower fan has lower hot air fan blades located in the lower cover shell and above the lower heating element.

[0008] As a further improved solution, the main body includes an upper air guide bracket covered outside the upper cover shell, the upper fan is installed on the upper air guide bracket and the upper fan has an upper heat dissipation fan blade located between the upper air guide bracket and the upper cover shell, and the upper air guide bracket has an upper air intake corresponding to the upper heat dissipation fan blade; The main body includes a lower air guide bracket covered outside the lower cover shell, the lower fan is installed on the lower air guide bracket and the lower fan has lower heat dissipation fan blades located between the lower air guide bracket and the lower cover shell, and the lower air guide bracket has a lower air intake corresponding to the lower heat dissipation fan blades.

[0009] As a further improved solution, the upper air guide bracket has an upper air guide channel, the upper heat dissipation fan blade is located in the upper air guide channel, the upper air guide channel has an upper air outlet, and the upper cover shell has an upper air return port connected to the upper air guide channel; The lower air guide bracket has a lower air guide channel, the lower heat dissipation fan blade is located in the lower air guide channel, the lower air guide channel has a lower air outlet, and the lower cover has a lower air return port connected to the lower air guide channel.

[0010] As a further improved solution, the cold air channel is arranged above the lower air guide bracket, and an air flow baffle is provided between the air inlet of the cold air channel and the lower air outlet on the lower air guide bracket to prevent the air flow from the lower air outlet from flowing to the air inlet.

[0011] As a further improved solution, the portion of the upper air guide bracket extending beyond the upper cover shell and the portion of the lower air guide bracket extending beyond the lower cover shell are respectively provided with air flow holes.

[0012] As a further improved solution, the upper heating fan blades and the upper heat dissipation fan blades are coaxially driven by the upper fan, and the lower heating fan blades and the lower heat dissipation fan blades are coaxially driven by the lower fan.

[0013] As a further improved solution, a plurality of side air holes communicating with the convection heat dissipation channel are provided on the rear wall and / or the left and right side walls of the housing.

[0014] As a further improved solution, the volume of the lower chamber is larger than that of the upper chamber, a control circuit board is provided beside the upper chamber, and the control circuit board is provided in the convection heat dissipation channel.

[0015] The multi-cavity stacked air fryer provided by the present invention has a multi-cavity stacked air fryer, in which the ventilation holes on the bottom wall of the shell are connected in sequence with the lower heat dissipation channel between the lower inner shell component and the shell, and the upper heat dissipation channel between the upper inner shell component and the shell, to form a convection heat dissipation channel, so that a large heat dissipation cycle that is connected as a whole is formed inside the shell, thereby preventing the heat radiated from the chamber into the shell from being difficult to dissipate due to poor convection or the occurrence of a heat dissipation blind spot; at the same time, a cold air channel separated from the convection heat dissipation channel is provided, and the cold air channel cover is arranged above the downblower and has an air inlet connected to the outside of the shell to guide external cold air to forcibly dissipate heat to the downblower. By adding a cold air channel physically isolated from the convection heat dissipation channel, the downblower is blown directly by external cold air, thereby achieving targeted and directional cooling of high-temperature components. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional combination diagram of the multi-cavity stacked air fryer of the present invention.

[0017] Figure 2 It is a three-dimensional combination diagram of the multi-cavity stacked air fryer of the present invention from another perspective.

[0018] Figure 3 This is a three-dimensional combination diagram of the multi-cavity stacked air fryer of the present invention from another perspective.

[0019] Figure 4 It is a three-dimensional exploded view of the multi-cavity stacked air fryer of the present invention.

[0020] Figure 5It is a three-dimensional diagram of the multi-cavity stacked air fryer of the present invention with the outer shell removed.

[0021] Figure 6 It is a longitudinal cross-sectional view of the multi-cavity stacked air fryer of the present invention in the front-to-back direction.

[0022] Figure 7 It is a longitudinal cross-sectional view of the multi-cavity stacked air fryer of the present invention in the left and right directions.

[0023] Figure 8 It is a transverse cross-sectional view of the multi-cavity stacked air fryer of the present invention.

[0024] Figure 9 It is another transverse cross-sectional view of the multi-cavity stacked air fryer of the present invention.

[0025] The accompanying drawings are numbered as follows: 100, air fryer; 10, main body; 2, upper frying basket; 3, lower frying basket; 1, outer shell; 101, side air vents; 11, bottom wall; 110, ventilation holes; 12, front wall frame; 13, control circuit board; 20, upper chamber; 201, upper heat dissipation channel; 21, upper inner shell; 22, upper cover shell; 220, upper return air vent; 23, upper air guide bracket; 230, upper air outlet; 24, upper fan; 241, upper heating fan blade; 242 , upper heat dissipation fan blades; 25, upper heating element; 26, upper support plate; 30, lower chamber; 301, lower heat dissipation channel; 31, lower inner shell; 32, lower cover shell; 320, lower return air outlet; 33, lower air guide bracket; 330, lower air outlet; 331, air flow baffle; 34, lower fan; 341, lower heat dissipation fan blades; 342, lower heat dissipation fan blades; 35, lower heating element; 36, lower support plate; 4, cold air channel; 401, air inlet; 8, air flow hole. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] The multi-cavity stacked air fryer provided in the embodiment of the present invention adopts a dual-cavity vertical stacking structure, and realizes efficient and reliable heat dissipation through an innovatively designed heat dissipation system, thereby ensuring long-term stable operation of the equipment.

[0029] See also Figures 1 to 9As shown, the present invention discloses a multi-cavity stacked air fryer 100, comprising a main body 10 and a frying basket, wherein the main body 10 has an upper chamber 20 and a lower chamber 30 arranged in a stacked manner, and the frying basket comprises an upper frying basket 2 that can be pulled out and assembled in the upper chamber 20 and a lower frying basket 3 that can be pulled out and assembled in the lower chamber 30.

[0030] The main body 10 includes an outer shell 1, an upper inner shell assembly, a lower inner shell assembly, an upper hot air assembly and a lower hot air assembly. The outer shell 1 has a bottom wall 11, and a ventilation hole 110 is opened on the bottom wall 11. The upper inner shell assembly is arranged in the outer shell 1, and the upper inner shell assembly is arranged to form the upper chamber 20. The upper inner shell assembly and the outer shell 1 are spaced apart to form an upper heat dissipation channel 201. The lower inner shell assembly is arranged in the outer shell 1, and the lower inner shell assembly is arranged to form the lower chamber 30. The lower inner shell assembly and the outer shell 1 are spaced apart to form a lower heat dissipation channel 301. The upper hot air assembly is used to generate hot air into the upper chamber 20, and includes an upper heating element 25 and an upper fan 24. The lower hot air assembly is used to generate hot air into the lower chamber 30, and includes a lower heating element 35 and a lower fan 34. Among them, the ventilation holes 110, the lower heat dissipation channel 301 and the upper heat dissipation channel 201 are connected in sequence from bottom to top to form a convection heat dissipation channel. A cold air channel 4 is also provided between the upper inner shell assembly and the lower hot air assembly. The cold air channel 4 is separated from the convection heat dissipation channel. Its cover is provided above the lower fan 34 and has an air inlet 401 connected to the outside of the outer shell 1 to guide the external cold air to force the lower fan 34 to dissipate heat.

[0031] The multi-cavity stacked air fryer 100 provided by the present invention has a housing 1 in which the ventilation holes 110 on the bottom wall 11 are connected in sequence with the lower heat dissipation channel 301 between the lower inner housing assembly and the housing 1 and the upper heat dissipation channel 201 between the upper inner housing assembly and the housing 1, forming a convection heat dissipation channel, so that a large heat dissipation cycle is formed inside the housing 1 as a whole, thereby preventing the heat radiated from the chamber into the housing 1 from being difficult to dissipate due to poor convection or the formation of a heat dissipation blind spot; at the same time, a cold air channel 4 separated from the convection heat dissipation channel is provided, and the cold air channel 4 is covered above the lower fan 34 and has an air inlet 401 connected to the outside of the housing 1 to guide external cold air to forcibly dissipate heat to the lower fan 34. By adding a cold air channel 4 physically isolated from the convection heat dissipation channel, the external cold air is directly blown onto the lower fan 34, thereby achieving targeted and directional cooling of high-temperature components.

[0032] See also Figures 1 to 3As shown, specifically in this embodiment, the air fryer 100 has an overall vertical tower-shaped structure. The outer surface of the main body 10 is an outer shell 1. A front wall frame 12 is formed at the front of the outer shell 1. Two sets of pull-out openings are vertically arranged side by side on the front wall frame 12, corresponding to the opening positions of the upper chamber 20 and the lower chamber 30, respectively. The upper frying basket 2 is pulled horizontally through the upper opening of the front wall frame 12 and inserted into the upper chamber 20. The lower frying basket 3 is pulled horizontally through the lower opening of the front wall frame 12 and inserted into the lower chamber 30. The rear wall of the outer shell 1 is provided with a plurality of side vents 101. These side vents 101 are connected to the convection heat dissipation channels described below, forming a complete heat dissipation circulation path. In other embodiments, the side vents 101 may also be provided on the left and right side walls of the outer shell 1.

[0033] See also Figures 4 to 7 As shown, the interior of the outer shell 1 is separated into two independent cooking chambers by an upper inner shell assembly and a lower inner shell assembly. The upper inner shell assembly includes an upper inner shell 21 with an upper opening and an upper cover shell 22 covering the upper opening of the upper inner shell 21. That is, the upper inner shell assembly is composed of the upper inner shell 21 with an upper opening and the upper cover shell 22 covering its opening, and the two together enclose the upper chamber 20. There is a gap between the outer wall of the upper inner shell 21 and the inner wall of the outer shell 1, forming an upper heat dissipation channel 201. The lower inner shell assembly includes a lower inner shell 31 with an upper opening and a lower cover shell 32 covering the upper opening of the lower inner shell 31. That is, the lower inner shell assembly is composed of the lower inner shell 31 with an upper opening and the lower cover shell 32 covering its opening, and the two together enclose the lower chamber 30. There is also a gap between the outer wall of the lower inner shell 31 and the inner wall of the outer shell 1, forming a lower heat dissipation channel 301. The widths of the upper and lower heat dissipation channels 201 and 301 are not required to be the same at all locations, nor are they required to be the same at all locations. Specifically, in this embodiment, the volume of the lower chamber 30 is larger than that of the upper chamber 20, and the lower heat dissipation channel 301 is narrower than the upper heat dissipation channel 201.

[0034] It should be noted that, in this embodiment, the multi-cavity stacked air fryer 100 having two layers is used as an example for description. In other embodiments, the multi-cavity stacked air fryer 100 may also have three or more layers.

[0035] In this embodiment, the bottom wall 11 of the housing 1 is provided with ventilation holes 110 arranged in an array. These ventilation holes 110 constitute the bottom air inlet of the convection heat dissipation channel. After the cold air enters through the ventilation holes 110, it first flows upward along the lower heat dissipation channel 301 to dissipate the heat radiated from the lower inner shell component into the housing 1, then enters the upper heat dissipation channel 201 to dissipate the heat radiated from the upper inner shell component into the housing 1, and finally is discharged through the side air holes 101 on the housing 1, forming a complete natural convection cycle, effectively avoiding the risk of overheating and deformation of the housing 1. The airflow direction of the natural convection cycle is as follows: Figure 7Indicated by the arrow.

[0036] Specifically, in this embodiment, the main body 10 includes an upper support plate 26 disposed between the upper inner shell assembly and the cold air duct 4, and the portion of the upper support plate 26 extending beyond the upper inner shell assembly is provided with an air flow hole 8. Similarly, the main body 10 includes a lower support plate 36 disposed between the lower inner shell assembly and the bottom wall 11, and the portion of the lower support plate 36 extending beyond the lower inner shell assembly is provided with an air flow hole 8. Further, the main body 10 also includes an upper air guide bracket 23 disposed outside the upper cover shell 22, and the portion of the upper air guide bracket 23 extending beyond the upper cover shell 22 is provided with an air flow hole 8. Similarly, the main body 10 includes a lower air guide bracket 33 disposed outside the lower cover shell 32, and the portion of the lower air guide bracket 33 extending beyond the lower cover shell 32 is provided with an air flow hole 8. Thus, the ventilation holes 110 on the bottom wall 11, the airflow holes 8 on the various components, and the side air holes 101 connect the space between the housing 1 and the upper and lower chambers to the outside world, forming a natural convection circulation path. Furthermore, it should be noted that in some embodiments, a cooling fan may be further provided within this convection heat dissipation channel to enhance the top-down convection heat dissipation.

[0037] In this embodiment, the volume of the lower chamber 30 is larger than that of the upper chamber 20. A control circuit board 13 is located next to the upper chamber 20 and is positioned within the convection heat dissipation channel, where it is cooled by the heat dissipation airflow. This asymmetrical design, with the lower chamber 30 larger and the upper chamber 20 smaller, accommodates the user experience of the lower chamber 30 typically carrying larger food items and makes the air fryer 100 more stable.

[0038] Please continue reading Figures 4 to 8As shown, in this embodiment, the upper heating element 25 is disposed within the upper housing 22 and is a heat pipe. The upper fan 24 is mounted on the upper air guide bracket 23. The upper fan 24 includes upper heating fan blades 241 located within the upper housing 22 and above the upper heating element 25, and upper heat dissipation fan blades 242 located between the upper air guide bracket 23 and the upper housing 22. The upper air guide bracket 23 has an upper air intake corresponding to the upper heat dissipation fan blades 242. The upper air guide bracket 23 has an upper air guide channel. The upper heat dissipation fan blades 242 are located within the upper air guide channel. The upper air guide channel has an upper air outlet 230. The upper housing 22 has an upper air return port 220 connected to the upper air guide channel. The upper heating fan blades 241 are used to blow air toward the upper heating element 25, thereby blowing hot air into the upper chamber 20 to heat and cook the food. The upper heat dissipation fan blades 242 are used to dissipate heat from the motor of the upper fan 24 to prevent the motor from overheating. In this embodiment, the upper heat dissipation fan blades 241 and the upper heat dissipation fan blades 242 are coaxially driven by the upper fan 24. This design simplifies the structure and improves transmission efficiency.

[0039] Similarly, see Figures 4 to 7 and Figure 9 As shown, the lower heating element 35 is disposed within the lower housing 32, and the upper heating element 25 is a heat pipe. The lower fan 34 is mounted on the lower air guide bracket 33. The lower fan 34 includes lower heating fan blades 341 located within the lower housing 32 and above the lower heating element 35, and lower heat dissipation fan blades 342 located between the lower air guide bracket 33 and the lower housing 32. The lower air guide bracket 33 has a lower air intake corresponding to the lower heat dissipation fan blades 342. The lower air guide bracket 33 has a lower air guide channel. The lower heat dissipation fan blades 342 are located within the lower air guide channel. The lower air guide channel has a lower air outlet 330. The lower housing 32 has a lower air return port 320 connected to the lower air guide channel. The lower heating fan blades 341 are used to blow air toward the lower heating element 35, thereby blowing hot air into the lower chamber 30 to heat and cook the food. The lower heat dissipation fan blades 342 are used to dissipate heat from the motor of the lower fan 34 to prevent the motor from overheating. In this embodiment, the lower heat dissipation fan blades 341 and the lower heat dissipation fan blades 342 are coaxially driven by the lower fan 34.

[0040] Since the lower fan 34 is located in the middle of the air fryer 100, with the upper chamber 20 above it and the lower chamber 30 below it, it is heated in both directions and has difficulty in dissipating heat. In order to solve the heat dissipation problem of the lower fan 34, this embodiment innovatively sets an independent cold air channel 4. Figure 9As shown, in this embodiment, the cold air duct 4 is arranged above the lower air guide bracket 33 and is fixed to the upper part of the lower air guide bracket 33 by screws. An air inlet 401 is provided at the front end of the cold air duct 4 to guide external cold air precisely into the interior of the air duct. The cold air duct 4 is completely isolated from the convection heat dissipation channel. The air inlet 401 of the cold air duct 4 draws in ambient air and blows it across the motor body of the lower fan 34 through the lower heat dissipation fan blades 342, forcing convection heat dissipation of the motor of the lower fan 34. In this embodiment, an air flow baffle 331 is provided between the air inlet 401 of the cold air duct 4 and the lower air outlet 330 on the lower air guide bracket 33 to prevent the airflow from the lower air outlet 330 from flowing toward the air inlet 401. The air flow baffle 331 is provided between the lower air outlet 330 of the lower air guide bracket 33 and the air inlet 401 of the cold air duct 4 to effectively prevent the hot air discharged from the lower chamber 30 from flowing back, thereby preventing hot air from entering the cold air duct 4.

[0041] The working process of the air fryer 100 provided by the present invention when in use is as follows. The upper hot air assembly and the lower hot air assembly work independently, the upper heating element 25 generates heat, and the upper fan 24 blows hot air into the upper chamber 20 through the upper hot air fan blades 241 to heat the food. At the same time, the upper heat dissipation fan blades 242 discharge the heat in the upper cover shell 22 from the upper air outlet 230 through the air guide channel of the upper air guide bracket 23. The lower heating element 35 generates heat, and the lower fan 34 blows hot air into the lower chamber 30 through the lower hot air fan blades 341. The lower heat dissipation fan blades 342 discharge the heat in the lower cover shell 32 from the lower air outlet 330 through the air guide channel of the lower air guide bracket 33. The airflow direction is as follows Figure 6 As shown by the arrow in the middle. The heat radiated by the upper chamber 20 and the lower chamber 30 during operation causes the temperature in the upper heat dissipation channel 201 and the lower heat dissipation channel 301 to rise. In response, the external cold air enters from the ventilation holes 110 of the bottom wall 11 of the housing 1, passes through the air flow holes 8, and flows through the lower heat dissipation channel 301 and the upper heat dissipation channel 201 in sequence, forming a convection heat dissipation channel from bottom to top, and the heat is discharged from the side air holes 101. The airflow flows to the following direction: Figure 7 At the same time, external cold air also enters through the air inlet 401 of the cold air duct 4, directly forcing the down fan 34 to dissipate heat. This dual heat dissipation mechanism ensures efficient and stable operation of the equipment.

[0042] From the above description of the specific embodiments, it can be seen that the multi-cavity stacked air fryer 100 provided by the present invention has a ventilation hole 110 on the bottom wall 11 of its shell 1, which is connected in sequence with the lower heat dissipation channel 301 between the lower inner shell assembly and the shell 1 and the upper heat dissipation channel 201 between the upper inner shell assembly and the shell 1 to form a convection heat dissipation channel, so that a large heat dissipation cycle is formed inside the shell 1 as a whole, thereby preventing the heat radiated from the chamber into the shell 1 from being difficult to dissipate due to poor convection or the occurrence of a heat dissipation blind spot; at the same time, a cold air channel 4 separated from the convection heat dissipation channel is provided, and the cold air channel 4 is covered above the lower fan 34 and has an air inlet 401 connected to the outside of the shell 1 to guide the external cold air to forcibly dissipate heat to the lower fan 34. By adding a cold air channel 4 physically isolated from the convection heat dissipation channel, the external cold air is directly blown onto the lower fan 34, thereby achieving targeted and directional cooling of high-temperature components.

[0043] The present invention is described by means of several specific embodiments. It should be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the present invention without departing from the scope of the present invention. In addition, various modifications may be made to the present invention for specific situations or circumstances without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but is intended to include all embodiments falling within the scope of the claims of the present invention.

Claims

1. A multi-cavity stacked air fryer, comprising a main body and a frying basket, wherein the main body has an upper chamber and a lower chamber arranged in a stacked manner, and the frying basket comprises an upper frying basket that can be pulled out and assembled in the upper chamber and a lower frying basket that can be pulled out and assembled in the lower chamber, characterized in that: The subject includes: The housing has a bottom wall with ventilation holes formed on the bottom wall; An upper inner shell assembly is disposed in the outer shell, the upper inner shell assembly enclosing the upper chamber, and a distance is provided between the upper inner shell assembly and the outer shell to form an upper heat dissipation channel; A lower inner shell assembly is disposed in the outer shell, the lower inner shell assembly enclosing the lower chamber, and a distance is provided between the lower inner shell assembly and the outer shell to form a lower heat dissipation channel; an upper hot air assembly, for generating hot air into the upper chamber, comprising an upper heating element and an upper blower; and a lower hot air assembly, for generating hot air into the lower chamber, comprising a lower heating element and a lower fan; Among them, the ventilation holes, lower heat dissipation channel and upper heat dissipation channel are connected in sequence from bottom to top to form a convection heat dissipation channel. A cold air channel is also provided between the upper inner shell assembly and the lower hot air assembly. The cold air channel is separated from the convection heat dissipation channel. Its cover is provided above the lower fan and has an air inlet connected to the outside of the outer shell to guide external cold air to force heat dissipation of the lower fan.

2. The multi-cavity stacked air fryer according to claim 1, characterized in that: The main body includes an upper support plate disposed between the upper inner shell assembly and the cold air channel, and a portion of the upper support plate extending beyond the upper inner shell assembly is provided with an air flow hole; and / or, The main body includes a lower support plate arranged between the lower inner shell component and the bottom wall, and a portion of the lower support plate extending beyond the lower inner shell component is provided with an air flow hole.

3. The multi-cavity stacked air fryer according to claim 1, characterized in that: The upper inner shell assembly includes an upper inner shell with an upper opening and an upper cover shell covering the upper opening of the upper inner shell, the upper heating element is arranged in the upper cover shell, and the upper fan has an upper heating fan blade located in the upper cover shell and above the upper heating element; The lower inner shell assembly includes a lower inner shell with an upper opening and a lower cover shell covering the upper opening of the lower inner shell. The lower heating element is arranged in the lower cover shell. The lower fan has lower hot air fan blades located in the lower cover shell and above the lower heating element.

4. The multi-cavity stacked air fryer according to claim 3, characterized in that: The main body includes an upper air guide bracket covered outside the upper cover shell, the upper fan is installed on the upper air guide bracket and the upper fan has an upper heat dissipation fan blade located between the upper air guide bracket and the upper cover shell, and the upper air guide bracket has an upper air intake corresponding to the upper heat dissipation fan blade; The main body includes a lower air guide bracket covered outside the lower cover shell, the lower fan is installed on the lower air guide bracket and the lower fan has lower heat dissipation fan blades located between the lower air guide bracket and the lower cover shell, and the lower air guide bracket has a lower air intake corresponding to the lower heat dissipation fan blades.

5. The multi-cavity stacked air fryer according to claim 4, characterized in that: The upper air guide bracket has an upper air guide channel, the upper heat dissipation fan blade is located in the upper air guide channel, the upper air guide channel has an upper air outlet, and the upper cover has an upper air return port connected to the upper air guide channel; The lower air guide bracket has a lower air guide channel, the lower heat dissipation fan blade is located in the lower air guide channel, the lower air guide channel has a lower air outlet, and the lower cover has a lower air return port connected to the lower air guide channel.

6. The multi-cavity stacked air fryer according to claim 5, characterized in that: The cold air channel is arranged above the lower air guide bracket, and an air flow baffle is provided between the air inlet of the cold air channel and the lower air outlet on the lower air guide bracket to prevent the air flow from the lower air outlet from flowing to the air inlet.

7. The multi-cavity stacked air fryer according to claim 4, characterized in that: The portion of the upper air guide bracket extending beyond the upper cover shell and the portion of the lower air guide bracket extending beyond the lower cover shell are respectively provided with air flow holes.

8. The multi-cavity stacked air fryer according to claim 4, characterized in that: The upper heating fan blades and the upper heat dissipation fan blades are coaxially driven by the upper fan, and the lower heating fan blades and the lower heat dissipation fan blades are coaxially driven by the lower fan.

9. The multi-cavity stacked air fryer according to any one of claims 1 to 8, characterized in that: A plurality of side air holes communicating with the convection heat dissipation channels are provided on the rear wall and / or the left and right side walls of the shell.

10. The multi-cavity stacked air fryer according to any one of claims 1 to 8, characterized in that: The volume of the lower chamber is greater than that of the upper chamber. A control circuit board is provided beside the upper chamber, and the control circuit board is provided in the convection heat dissipation channel.

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