CN114098455B - Air frying cooking appliance with hot air boost function - Google Patents

Abstract

The invention provides an air frying cooking utensil with a hot air pressurizing function, which is characterized by comprising a hot air circulation fan blade, wherein the hot air circulation fan blade pushes air into an air outlet pipe surrounding an inner cavity of an oven, the air outlet pipe, a bottom cover of a fan and an upper cover of the cavity form a closed volute-shaped hot air channel, the hot air circulation fan blade is arranged in the hot air channel, and the hot air circulation fan blade pushes air into the air outlet pipe; the air outlet pipe is arranged around the fan bottom cover, the cross section of the air outlet pipe is in a hollow inverted trapezoid shape, a downward air outlet is arranged at the bottom of the air outlet pipe, and air is exhausted downwards through the air outlet and towards the inner cavity of the oven.

Description

Air frying cooking appliance with hot air boost function

Technical Field

The invention relates to an air frying cooking utensil, in particular to an air frying cooking utensil with a hot air pressurization function.

Background Art

Air frying cooking appliances are kitchen appliances that use air heating components and the hot air circulation airflow they generate to bake food. Common air frying cooking appliances include air fryers, air ovens and other cooking appliances that work on the air frying principle.

Air ovens can be used to process some pasta, such as bread, pizza, or snacks such as egg tarts and biscuits. The air oven consists of a box body, a door, an air heating element, and a temperature control and timing device.

Typically, an air oven has a heating component and a cooling component.

The heating component is used to heat the air in the chamber to 100-200°C and form an airflow in the chamber to heat the food in the chamber. The cooling component is used to generate cold air and emit it to the outside. This can maintain the temperature of electronic components such as motors from being too high to avoid damaging electronic components and reduce the temperature of the oven shell.

The air ovens currently on the market usually consist of a motor cover, cold air blades, hot air pipe cover, hot air blades, heating pipes, and a box from top to bottom. The hot air blades are arranged in a horizontal direction, and the hot air is blown out along the four sides of the hot air blades, passes through the heating pipes, and diffuses to the four sides of the box, and then returns from the middle of the box to form a hot air cycle. In this hot air cycle, the hot air is difficult to be blown to the bottom of the oven box and moves upward. This is something that users do not want to see.

The above shortcomings affect the normal use of the air oven and reduce the user experience. Therefore, the present application aims to solve the above-mentioned hot air circulation heating problem, so that the food is heated evenly and the food processing quality and processing efficiency are improved.

Summary of the invention

In order to solve the above technical problems, the purpose of the present invention is to provide an air frying cooking appliance with a hot air boosting function, characterized in that it has hot air circulation blades, which push air into an air outlet duct surrounding the inner cavity of an oven, wherein the air outlet duct, the fan bottom cover and the cavity upper cover together form a closed volute-shaped hot air channel, the hot air circulation blades are placed in the hot air channel, and the hot air circulation blades push air into the air outlet duct; the air outlet duct is arranged around the fan bottom cover, the cross-section of the air outlet duct is a hollow inverted trapezoidal shape, and a downward air outlet is arranged at the bottom of the air outlet duct, and the air is discharged downward and into the inner cavity of the oven through the air outlet.

In one embodiment, the hot air circulation blades are turbine blades.

In one embodiment, a motor, a motor cover with a cold air outlet, a cold air blade, a cavity upper cover with a cavity upper cover hot air outlet, a hot air circulation blade, an air outlet pipe, a fan bottom cover, and a heating pipe are arranged in sequence; wherein the motor shaft of the motor cover passes through the motor cover, the cold air blade, the cavity upper cover, and the hot air circulation blade in sequence;

The fan bottom cover is provided with a fan bottom cover shaft hole, so that the hot air circulation fan blades inhale air through the fan bottom cover shaft hole.

In one embodiment, the heating pipe is arranged below the hot air circulation blades.

In one embodiment, the heating pipe is arranged below the air outlet pipe.

In one embodiment, the ratio of the width (W) of the air outlet in the air outlet pipe to the width of the upper part of the inner cavity of the air outlet pipe is 1:5-30.

In one embodiment, the ratio of the width (W) of the air outlet in the air outlet pipe to the width of the upper part of the inner cavity of the air outlet pipe is 1:20.

In one embodiment, an angle θ between an edge of the lower end of the air outlet pipe close to the inside of the air frying cooking appliance and the vertical direction is 5-45°.

In one embodiment, an angle θ between a side of the lower end of the air outlet pipe close to the inside of the air frying cooking appliance and the vertical direction is 20-30°.

In one embodiment, it also has a food placement aid.

The present invention provides at least the following technical effects:

The hot air circulation fan blades are turbine fan blades, which are turbocharged and send air through the air duct. The hot air that has been pressurized multiple times is squeezed in the inner cavity of the air outlet duct to the surrounding air outlets, so that the hot air passes through the air outlet downward and outward to the inner wall of the inner cavity of the box body to evenly heat the food placed on the multi-layer shelves, and the central axis hole of the hot air circulation fan blades sucks air upward from the center of the inner cavity, so that a circulating hot air flow is formed in the center of the inner cavity.

Other features and advantages of the present application will be set forth in the following description or may be understood through implementation of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention takes an air oven as an example and provides further explanation of the technical solution of the present application through the accompanying drawings. The accompanying drawings constitute a part of the specification and are used together with the embodiments of the present application to explain the technical solution of the present application, but do not constitute a limitation on the technical solution of the present application.

FIG1A is a schematic diagram of an air oven with hot air pressurization function involved in the present application;

FIG1B is a partial enlarged schematic diagram of FIG1A ;

FIG2 is a schematic diagram of a motor of an air oven with a hot air boosting function according to the present application;

FIG3 is a schematic diagram of a motor cover of an air oven with hot air pressurization function involved in the present application;

FIG4 is a schematic diagram of an exhaust hood of an air oven with a hot air pressurization function according to the present application;

FIG5 is a schematic diagram of a hot air circulation fan blade of an air oven with a hot air boosting function involved in the present application;

FIG6 is a schematic diagram of an air outlet duct of an air oven with hot air pressurization function involved in the present application;

FIG7 is a schematic diagram of a fan bottom cover of an air oven with hot air pressurization function involved in the present application;

FIG8 is a schematic diagram of the assembly of an air outlet pipe, a fan bottom cover and hot air circulation blades of an air oven with hot air boosting function involved in the present application;

FIG9A is a schematic diagram of an angle of the upper cover of the cavity of the air oven with hot air pressurization function involved in the present application;

FIG9B is a schematic diagram of another angle of the cavity upper cover of the air oven with hot air pressurization function involved in the present application;

FIG10 is a schematic diagram of a heating tube of an air oven with hot air pressurization function involved in the present application;

FIG. 11 is a schematic diagram of a food placement auxiliary component of an air oven with a hot air boosting function according to the present application.

FIG. 12 is a schematic diagram of the working principle of the air oven with hot air boosting function involved in the present application.

Description of reference numerals:

1-motor; 1b-motor shaft;

2-exhaust hood; 2a-cold air outlet; 2b-hot air outlet;

3-motor cover; 3a-motor shaft hole; 3b-air inlet; 3c-cold air outlet; 3d-hot air outlet; 3e-motor cover heating pipe hole

4-cold wind blade;

5-hot air circulation fan blade; 5a-hot air circulation fan blade shaft hole; 5b-hot air circulation fan blade;

6-heating tube; 6a-heating tube electrode; 6b-heating tube fixing plate;

7-air outlet; 7a-air inlet; 7b-side wind shield of the air outlet; 7c-side shield of the air outlet; 7d-air outlet; 7e-upper plane of the air outlet;

8- fan bottom cover; 8a- fan bottom cover shaft hole; 8b- air guide slot; 8c- side wind shield of fan bottom cover; 8d- heating pipe fixing slot; 8e- side shield of fan bottom cover; 8f- upper plane of fan bottom cover;

9- cavity cover; 9a- cavity cover shaft hole; 9b- cavity cover first plane; 9c- cavity cover first side; 9d- cavity cover hot air outlet; 9e- cavity cover second plane; 9f- cavity cover heating pipe hole; 9g- shelf fixing hole; 9h- inner cavity;

10-shelf; 10a-shelf feet

DETAILED DESCRIPTION

1A and 1B , an air oven with hot air boosting function involved in the present application is shown, which at least includes a motor 1, a motor cover 3, a cold air blade 4, a cavity upper cover 9, a hot air circulation blade 5, a combination of an air outlet pipe 7 and a fan bottom cover 8, and a heating pipe 6, which are arranged in sequence from top to bottom.

The air outlet pipe 7 and the fan bottom cover 8 are at the same horizontal position. The air outlet pipe 7, the fan bottom cover 8 and the cavity upper cover 9 together form a closed volute-shaped hot air channel, and the hot air circulation fan blades 5 are placed in the hot air channel.

The following will introduce each component and its connection relationship in turn.

Referring to FIG. 2 , there is shown a motor 1 of an air oven with a hot air boosting function according to the present application.

The motor 1 is provided with a motor shaft 1b, which passes through a motor shaft hole 3a on a motor cover 3, and the motor 1 is fixed to the motor cover 3 by screws, bolts or other means.

The motor cover 3, the cold air blade 4, the cavity cover 9, and the hot air circulation blade 5 all have corresponding shaft holes at their central positions, namely, the motor shaft hole 3a, the cold air blade shaft hole, the cavity cover shaft hole 9a, and the hot air circulation blade shaft hole 5a. Thus, the motor shaft 1b on the motor 1 can pass through the above shaft holes in sequence to connect the cold air blade 4 and the hot air circulation blade 5, so that the motor 1 drives the cold air blade 4 and the hot air circulation blade 5 to rotate.

Referring to FIG. 3 , there is shown a motor cover 3 of an air oven with hot air pressurization function according to the present application.

The motor cover 3 is provided with a motor shaft hole 3a, an air inlet hole 3b, a cold air outlet 3c, a hot air outlet 3d, and a motor cover heating pipe hole 3e.

The air outlet on the motor cover 3 is divided into a cold air outlet 3c and a hot air outlet 3d by a partition bar, which are used to discharge cold air and hot air respectively.

The air inlet 3b on the motor cover 3 allows the cold air blade 4 to inhale cold air when working. It should be noted that the air inlet 3b is not necessary, and the upper part of the motor cover 3 can be a completely hollow ring, rectangle, square, etc. to increase the air inlet area.

Referring to FIG. 4 , there is shown an exhaust hood 2 of an air oven with a hot air pressurization function according to the present application.

The exhaust hood 2 is fixedly installed at the position of the air outlet of the motor cover 3. The size of the exhaust hood 2 can be selected, and its function is to be able to exhaust as much air as possible from the cold air outlet 3c and the hot air outlet 3d on the motor cover 3 through the exhaust hood 2. For example, for aesthetic reasons, the upper plane of the exhaust hood 2 can be installed on the same horizontal plane as the upper plane of the motor cover 3.

The exhaust hood 2 can also be a hollow whole without distinguishing between hot and cold air outlets. The hot air and cold air from the cold air outlet 3c and the hot air outlet 3d on the motor hood 3 can be mixed here.

The middle of the exhaust hood 2 can be divided into a cold air outlet 2a and a hot air outlet 2b by a partition bar. The cold air outlet 2a on the exhaust hood 2 is aligned and communicated with the cold air outlet 3c on the motor hood 3, and the width of the cold air outlet 3c on the motor hood 3 is smaller than the width of the cold air outlet 2a on the exhaust hood 2. The hot air outlet 2b on the exhaust hood 2 is aligned and communicated with the hot air outlet 3d on the motor hood 3, and the width of the hot air outlet 3d on the motor hood 3 is smaller than the width of the hot air outlet 2b on the exhaust hood 2. Thus, the cold air and the hot air are discharged separately to the outside of the air oven.

Referring to FIG. 5 , there is shown a hot air circulation fan blade 5 of an air oven with a hot air pressurization function according to the present application.

The hot air circulation blade 5 can be a turbine blade made of metal material. The hot air circulation blade 5 is provided with a hot air circulation blade shaft hole 5a and a hot air circulation blade 5b.

The hot air circulation blades, i.e., the turbine blades 5, are driven to rotate by the motor 1. The advantage of the turbine blades is that they have a strong wind force and can output a large wind force in a small space, thereby increasing the amount of air guided. The turbine blades 5 are driven by the motor 1 to rotate the impeller. The rotation of the blades in the impeller causes the air to rotate and do work on the air, thereby increasing the momentum of the air. The air is thrown out around the impeller under the action of centrifugal force.

6 and 7 , which respectively show the air outlet duct 7 and the fan bottom cover 8 of the air oven with hot air pressurization function involved in the present application.

The air outlet pipe 7 and the fan bottom cover 8 are sleeved together and installed, and have a concentric axis.

The air outlet 7 is provided with an air inlet 7a, a side wind shield 7b, a side shield 7c, and an upper plane 7e of the air outlet. The cross section of the air outlet is a hollow inverted trapezoidal shape with an open bottom.

The fan bottom cover 8 is provided with a fan bottom cover shaft hole 8a, an air guide groove 8b, a side wind shield 8c, a heating pipe fixing groove 8d, a side shield 8e, and a fan bottom cover upper plane 8f.

The air outlet pipe 7 is arranged around the fan bottom cover 8. After installation, the air outlet pipe upper plane 7e of the air outlet pipe 7 and the fan bottom cover upper plane 8f of the fan bottom cover 8 are on the same horizontal plane.

The side wind shield 7b on the air outlet duct 7 is connected to the side shield 8e of the fan bottom cover 8. The side shield 7c on the air outlet duct 7 is connected to the side wind shield 8c of the fan bottom cover 8. The air inlet 7a on the air outlet duct 7 is connected to the air guide groove 8b of the fan bottom cover 8, and the width of the air inlet 7a on the air outlet duct 7 is consistent with the air guide groove 8b of the fan bottom cover 8, so that all the air discharged from the air guide groove 8b of the fan bottom cover 8 can enter the air inlet 7a on the air outlet duct 7, and further enter the air outlet duct 7. The upper plane 8f of the fan bottom cover of the fan bottom cover 8 is fitted and fixedly installed with the second plane 9e of the cavity upper cover of the cavity upper cover 9, so as to form a volute-shaped hot air channel.

The fan bottom cover shaft hole 8a on the fan bottom cover 8 is used to allow the turbine blades 5 to suck in the air heated by the heating tube 6 when working in the hot air channel, and blow the hot air to the inner cavity of the inverted trapezoidal air outlet 7 through the air guide groove 8b. The hot air pressurized multiple times by the turbine blades 5 is squeezed in the inner cavity of the air outlet 7 toward the surrounding air outlets 7d, so that the hot air passes through the air outlet 7d to the outside through the inner wall of the inner cavity 9h of the box body and rapidly downward to evenly heat the food placed in the multi-layer shelf 10, and flows upward in the center of the inner cavity 9h of the box body to form a circulating hot air flow.

Referring to FIG. 1B , the air outlet 7 is an inverted trapezoid, or may be other structures having an air outlet 7d that exhausts air downward and toward the inner wall of the inner cavity of the oven. The width (W) of the air outlet 7d in the air outlet 7 is defined as the vertical distance from the end point of the outer short side of the air outlet 7d to the inner long side. The ratio of the width (W) of the air outlet 7d in the air outlet 7 to the width of the upper part of the inner cavity of the air outlet 7 is 1:5-30, preferably 1:20. The air outlet angle (θ) of the air outlet 7d in the air outlet 7 ranges from 5-45°, preferably 20-30°, and more preferably 25-27°. The air outlet angle (θ) is the angle between the air outlet direction of the air outlet 7d and the vertical direction, and can also be understood as the angle between the edges of the two lower ends of the air outlet 7 close to the inside of the air oven and the vertical direction.

Referring to FIG. 8 , there is shown a schematic diagram of the assembly of the air outlet duct, the fan bottom cover and the hot air circulation blades of the air oven with hot air pressurization function involved in the present application.

During operation, the hot air circulation blades 5, i.e., the turbine blades 5, are driven to rotate by the motor 1. The air is thrown out to the periphery of the impeller under the action of centrifugal force, and is sent to the air guide groove 8b of the fan bottom cover 8 through the vortex casing, so that the air is pressurized and discharged. When the air in the impeller is discharged, the pressure in the impeller is lower than the pressure at the air inlet, and new air is sucked in from the fan bottom cover shaft hole 8a in the middle of the fan bottom cover 8 below the hot air circulation blades 5 under the action of the pressure difference. And these new airs have passed through the heating tube 6 before being sucked in, so they have been heated. The turbine blades 5 then add the heated air and blow the hot air to the inner cavity of the air outlet pipe 7 through the air guide groove 8b of the fan bottom cover 8.

9A and 9B , schematic diagrams of different angles of the cavity upper cover 9 of the air oven with hot air pressurization function involved in the present application are shown.

The cavity upper cover 9 is provided with a cavity upper cover axial hole 9a, a cavity upper cover first plane 9b, a cavity upper cover first side surface 9c, a cavity upper cover hot air outlet 9d, a cavity upper cover second plane 9e, and a cavity upper cover heating pipe hole 9f.

The cavity upper cover first plane 9b on the cavity upper cover 9 and the air guide groove 8b of the fan bottom cover 8 form a mirror image shape.

A cavity upper cover hot air outlet 9d is provided on the first side surface 9c of the cavity upper cover 9, which is connected to the hot air outlet 3d on the motor cover 3, and then connected to the hot air outlet 2b on the exhaust cover 2 to discharge excess hot air out of the cavity.

The motor cover 3 is placed above the cavity upper cover 9 and partially surrounds the cavity upper cover 9. The bottom surface of the motor cover 3 is located on the second plane 9e of the cavity upper cover.

The bottom surface of the second cavity upper cover plane 9e on the cavity upper cover 9 is fitted with and fixedly installed to the fan bottom cover upper plane 8f of the fan bottom cover 8 to form a closed hot air channel.

The cavity upper cover 9 can be integrally formed with the four walls of the box body except the box door, namely the back, left side, right side and bottom surface; or it can be spliced together with the other four walls.

Referring to FIG. 10 , there is shown a heating tube of an air oven with hot air pressurization function according to the present application.

The heating pipe 6 is located below the fan bottom cover 8 .

The fan bottom cover 8, the cavity upper cover 9, and the motor cover 3 are respectively provided with a heating pipe fixing groove 8d, a cavity upper cover heating pipe hole 9f, and a motor cover heating pipe hole 3e. The heating pipe electrode 6a on the heating pipe 6 passes through the heating pipe fixing groove 8d, the cavity upper cover heating pipe hole 9f, and the motor cover heating pipe hole 3e from bottom to top, thereby fixing the positions of the fan bottom cover 8, the cavity upper cover 9, and the motor cover 3.

The heating tube fixing plate 6b on the heating tube 6 is fixed to the heating tube fixing groove 8d on the fan bottom cover 8 by screws, and a certain distance is defined between the heating tube 6 and the bottom surface of the fan bottom cover 8, preferably greater than 10 mm. This distance is conducive to the utilization of heat energy, effectively improves thermal efficiency, and heats food faster.

Referring to FIG. 11 , there is shown a food placement auxiliary component of an air oven with a hot air boosting function according to the present application.

The food placement auxiliary member described in the present application can be a shelf or a converter, as long as it can place food and does not hinder air circulation. When the air frying cooking appliance is an air fryer, the food placement auxiliary member can be a frying basket, etc.

For example, the left and right sides of the box body may be provided with shelf fixing holes 9g to fix and set up the shelf 10. The shelf legs 10a on the shelf 10 pass through the shelf fixing holes 9g on the left and right sides of the box body and are fixedly installed in the box body to form a multi-layer bracket of the inner cavity. Therefore, the user can place a baking tray with a gap on the multi-layer bracket.

Referring to FIG. 12 , the working principle of the air oven involved in the present application is briefly described below.

When in operation, the air oven is divided into a cold air generation and exhaust process and a hot air generation and exhaust process. It should be understood that these two processes occur substantially at the same time. For the sake of clarity, the two are described separately.

The following describes the process of cold air generation and exhaust.

Air is sucked into the shell of the air oven from the air suction port on the shell of the air oven. The air suction port can be set at any position of the air oven, such as directly above, obliquely above, to the side, or at the rear, as long as the air suction port can ensure the connection between the shell and the outside air.

A cold air cavity is formed between the upper surfaces of the first cavity cover plane 9b and the second cavity cover plane 9e of the cavity cover 9 and the motor cover 3. The cold air blades 4 are placed in the cold air cavity. The cold air cavity is directly connected to the cold air outlet 3c on the motor cover 3, and then connected to the cold air outlet 2a on the exhaust cover 2. Under the action of the motor 1, negative pressure is formed around the cold air blades 4, and the cold air outside is sucked into the shell, and fully heat exchanges with the shell, effectively reducing the temperature rise of the shell. The cold air blades 4 discharge the excess cold air from the circulation out of the cavity, ensuring that the temperature rise inside the machine is too high, preventing scalding of the user, and ensuring that the temperature of the machine is normal when working.

The following describes the hot air generation and exhaust process.

Under the action of the motor 1, the hot air circulation blades 5 rotate at high speed at the same time.

Due to the isolation of the cavity upper cover 9 , a volute air duct is formed between the bottom surface of the cavity upper cover second plane 9 e of the cavity upper cover 9 and the fan bottom cover upper plane 8 f of the fan bottom cover 8 .

The hot air circulation blades 5 in the hot air cavity composed of the fan bottom cover 8 and the cavity upper cover 9 are turbine blades, which suck the air heated by the heating tube 6 from the fan bottom cover shaft hole 8a of the fan bottom cover 8, and then send air toward the air guide groove 8b of the fan bottom cover 8 through the rotation of the turbine blades 5. The hot air pressurized in the volute air duct enters the inner cavity of the air outlet pipe 7 through the air guide groove 8b, and is squeezed toward the surrounding air outlet 7d, so that the hot air is blown toward the multi-layer shelf 10 placed in the inner cavity 9h through the downward air outlet 7d, and the food in the oven inner cavity 9h is evenly heated. That is, the air is first heated in the heating tube 6 and then pressurized. The hot air flows along the inner wall of the inner cavity 9h of the oven and circulates in the oven. According to the natural upward flow of the hot air and the suction force of the hot air circulation blades 5, the hot air naturally rises and continues to be heated by the heating tube 6, and is then pushed to the air outlet 7d by the hot air circulation blades 5 again, and then blown downward into the inner cavity 9h. In this way, the hot air forms a reciprocating cycle in the inner cavity 9h and evenly heats the food.

In one embodiment, the heating tube 6 may also be placed below the air outlet 7d so that the air is pressurized first and then heated.

Those skilled in the art will appreciate that the hot air circulation blades 5 as turbine blades can provide sufficient power to fill the inner cavity of the air outlet duct 7 with hot air, and the hot air can be blown downward to the bottom of the oven, or a position very close to the bottom of the oven.

The cavity upper cover hot air outlet 9d in the cavity upper cover first side 9c on the cavity upper cover 9 is connected to the hot air outlet 3d on the motor cover 3, and then connected to the hot air outlet 2b on the exhaust hood 2 to discharge excess hot air out of the oven.

Although the embodiments disclosed in this application are as described above, the contents described are only embodiments adopted for facilitating the understanding of this application and are not intended to limit this application. Any technician in the field to which this application belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in this application.

Claims (10)

1. An air frying cooking appliance with a hot air boosting function, characterized in that it has a hot air circulation fan blade (5), the hot air circulation fan blade (5) pushes air into an air outlet pipe (7) surrounding an inner cavity of an oven, wherein the air outlet pipe (7) together with a fan bottom cover (8) and a cavity upper cover (9) form a closed volute-shaped hot air channel, and the hot air circulation fan blade (5) is placed in the hot air channel; the air outlet pipe (7) is arranged around the fan bottom cover (8), the air outlet pipe upper plane (7e) of the air outlet pipe (7) and the fan bottom cover upper plane (8f) of the fan bottom cover (8) are on the same horizontal plane, and the side wind shield (7b) arranged on the air outlet pipe (7) is aligned with the fan bottom cover (8). ) is connected to a side baffle (8e) provided on the fan bottom cover (8); a side baffle (7c) provided on the air outlet pipe (7) is connected to a side air baffle (8c) provided on the fan bottom cover (8); an air inlet (7a) provided on the air outlet pipe (7) is connected to an air guide groove (8b) provided on the fan bottom cover (8); the cross section of the air outlet pipe (7) is a hollow inverted trapezoidal shape; a downward air outlet (7d) is provided at the bottom of the air outlet pipe (7); the air is discharged downward and toward the inner cavity of the oven through the air outlet (7d); and the fan bottom cover upper plane (8f) of the fan bottom cover (8) is fitted and fixedly installed with a cavity upper cover second plane (9e) provided on the cavity upper cover (9). 2. The air frying cooking appliance according to claim 1, characterized in that the hot air circulation blade (5) is a turbine blade. 3. The air frying cooking device according to claim 2, characterized in that the motor (1), the motor cover (3) having a cold air outlet (3c), the cold air blades (4), the cavity upper cover (9) having a cavity upper cover hot air outlet (9d), the hot air circulation blades (5), the air outlet pipe (7), the fan bottom cover (8), and the heating pipe (6) are arranged in sequence; wherein the motor shaft of the motor cover (3) passes through the motor cover (3), the cold air blades (4), the cavity upper cover (9), and the hot air circulation blades (5) in sequence; The fan bottom cover (8) is provided with a fan bottom cover shaft hole (8a), so that the hot air circulation blades (5) inhale air through the fan bottom cover shaft hole (8a). 4. The air frying cooking appliance according to claim 1, characterized in that the heating tube (6) is arranged below the hot air circulation blade (5). 5. The air frying cooking appliance according to claim 1, characterized in that the heating pipe (6) is arranged below the air outlet pipe (7). 6. The air frying cooking device according to claim 4, characterized in that the ratio of the width (W) of the air outlet (7d) in the air outlet pipe (7) to the width of the upper part of the inner cavity of the air outlet pipe (7) is 1:5-30. 7. The air frying cooking device according to claim 5, characterized in that the ratio of the width (W) of the air outlet (7d) in the air outlet pipe (7) to the width of the upper part of the inner cavity of the air outlet pipe (7) is 1:20. 8. The air frying cooking device according to claim 1, characterized in that the angle θ between the lower end of the air outlet pipe (7) close to the inside of the air frying cooking device and the vertical direction is 5-45°. 9. The air frying cooking device according to claim 7, characterized in that the angle θ between the side of the lower end of the air outlet pipe (7) close to the inside of the air frying cooking device and the vertical direction is 20-30°. 10. The air frying cooking device according to claim 1, characterized in that it also has a food placement auxiliary component.