Uniformly heated air fryer

Abstract

The utility model relates to air fryer of even heating, including shell, set up in the frying bucket of shell, air duct subassembly and air deflector, set up cold air inlet and hot air outlet on the shell, set up the air inlet and the frying barrel intercommunication of cold air inlet and air duct subassembly, and the air outlet of frying barrel and hot air outlet intercommunication, set up fan, heating element and air equalizing column in the air inlet, the axis of air equalizing column sets up along the air outlet direction of air inlet, air deflector sets up between air inlet and frying barrel, the air deflector is circumferentially set up air deflector hole around the air outlet direction of air inlet. The utility model sets up air equalizing column in the air inlet. The hot air flowing in the air inlet will flow around the air equalizing column and be ring-shaped and be spouted from the air inlet, and the air pressure distribution of the hot air spouted from the air inlet is more even, the hot air is conveniently guided by the air deflector, the distribution evenness of the hot air spouted into the frying barrel is improved, and the food material heating is more even.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to an air fryer that provides uniform heating. Background Technology

[0002] The uniformity of food heating is a core indicator of an air fryer, and ensuring that hot air is evenly sprayed onto the food is the key to determining whether the food is heated evenly.

[0003] Adding a fan inside the air fryer enhances its airflow structure, allowing hot air to be ejected from multiple points and improving its uniformity. However, the additional fan occupies a significant amount of space and has a more complex structure, impacting the cost and size of the air fryer. The additional fan can also introduce noise and vibration issues.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an air fryer with uniform heating to improve the uniformity of food heating.

[0006] The technical solution of this utility model is as follows: An air fryer for uniform heating includes an outer shell, a frying drum housed within the outer shell, an air duct assembly, and an air guide plate. The outer shell has a cold air inlet and a hot air outlet. The air duct assembly has an air inlet connecting the cold air inlet and the frying drum, and an air outlet connecting the frying drum and the hot air outlet. A fan, a heating element, and a uniform air column are housed within the air inlet. The axis of the uniform air column is aligned with the air outlet direction of the air inlet. The air guide plate is positioned between the air inlet and the frying drum. Around the air outlet direction of the air inlet, the air guide plate has circumferentially oriented air vents.

[0007] A further technical solution involves an air inlet duct comprising a first air section and a second air section. The flow path within the first air section is perpendicular to the air outlet direction of the air inlet duct. A uniform air column is positioned within the second air section.

[0008] A further technical solution involves a guide vane with a shape that is higher in the center and lower around the edges. That is, the guide vane gradually moves away from the center of the air duct assembly. Near the surface of the air duct assembly, the guide vane has raised guide ribs. These guide ribs are arranged radially around the center of the guide vane.

[0009] A further technical solution involves installing an air guide shroud on the air duct assembly, bypassing the air outlet direction of the air inlet. The area of ​​the air guide shroud gradually increases towards the frying drum. The air guide plate is located at the end of the air guide shroud near the frying drum.

[0010] A further technical solution involves forming an annular gap between the air guide plate and the air guide shroud around the air outlet direction of the air inlet duct.

[0011] A further technical solution is to create ventilation holes on the frying barrel.

[0012] A further technical solution involves gradually reducing the diameter of the frying drum towards the bottom. A grill rack is installed inside the frying drum, resting against the drum wall.

[0013] A further technical solution involves providing through holes on the air duct assembly. These through holes connect the air inlet duct and the cavity of the outer casing. The through holes also connect the air inlet duct between the cold air inlet and the heating element.

[0014] A further technical solution is that the air duct assembly includes an upper air duct cover and a lower air duct cover. The upper air duct cover and the lower air duct cover are coupled to form an air inlet duct and an air outlet duct.

[0015] A further technical solution involves installing a reflector inside the outer shell. The frying drum is housed within the reflector. An air inlet extends into the reflector. A reflective air outlet is provided on the reflector, connecting the frying drum and the air outlet.

[0016] The beneficial technical effects of this utility model are as follows: (1) The uniformly heated air fryer of this utility model has air guide plates installed in the air duct assembly and the frying drum support. Around the air outlet direction of the air inlet duct, air guide holes are opened circumferentially on the air guide plates. The hot air ejected from the air inlet duct is blocked from circumferential diffusion by the air guide plates, and is then sprayed from multiple points onto the frying drum along the air guide holes, making the distribution of the hot air injected into the frying drum more uniform and improving the uniformity of heating of the food inside the frying drum. At the same time, a uniform air column is also installed in the air inlet duct. The uniform air column is set along the air outlet direction of the air inlet duct. The hot air flowing in the air inlet duct will flow around the uniform air column and be ejected from the air inlet duct in a ring shape. The air pressure distribution of the hot air ejected from the air inlet duct is more uniform, facilitating the guidance of the hot air by the air guide plates, further improving the uniformity of the distribution of the hot air injected into the frying drum, making the food heated more uniformly.

[0017] (2) Furthermore, the air in the first wind section flows perpendicular to the uniform air column to ensure that the air flows in a ring around the uniform air column.

[0018] (3) Furthermore, the air guide plate is a truncated cone shape with a high center and low periphery, and air guide ribs are provided to reduce the resistance encountered when hot air impacts the air guide plate and ensure the circulation efficiency of hot air in the air fryer. Attached Figure Description

[0019] Figure 1 An exploded structural diagram of a uniformly heated air fryer according to an embodiment of the present disclosure is shown.

[0020] Figure 2A top view of an air fryer with uniform heating according to an embodiment of the present disclosure is shown.

[0021] Figure 3 A cross-sectional view of a uniformly heated air fryer according to an embodiment of the present disclosure is shown at point A.

[0022] Figure 4 A cross-sectional view of a uniformly heated air fryer according to an embodiment of the present disclosure is shown at point B.

[0023] Figure 5 A three-dimensional structural diagram of the air guide hood and air guide plate in an air fryer with uniform heating according to an embodiment of the present disclosure is shown.

[0024] Marked in the attached diagram: 1. Outer shell; 11. Cavity; 12. Cold air inlet; 13. Hot air outlet; 2. Reflector; 21. Reflective air outlet; 3. Frying drum; 31. Ventilation hole; 32. Grill rack; 4. Fan; 5. Air duct cover; 51. Air inlet; 511. First air section; 512. Second air section; 52. Air outlet; 53. Uniform air column; 6. Air duct cover; 61. Heating element; 62. Air duct hot air outlet; 7. Air guide cover; 71. Connecting hole; 8. Air guide plate; 81. First air guide extension; 82. Second air guide extension; 83. Air guide rib; 84. Air guide hole; 85. Annular gap. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0026] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Figure 1An exploded structural diagram of a uniformly heated air fryer according to an embodiment of the present disclosure is shown. Figure 2 A top view of an air fryer with uniform heating according to an embodiment of the present disclosure is shown. Figure 3 A cross-sectional view of a uniformly heated air fryer according to an embodiment of the present disclosure is shown at point A. Figure 4 A cross-sectional view of a uniformly heated air fryer according to an embodiment of the present disclosure is shown at point B. Figure 5 A three-dimensional structural schematic diagram of the air guide hood and air guide plate in an air fryer with uniform heating according to an embodiment of the present disclosure is shown. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The uniformly heated air fryer includes an outer shell 1, a frying drum 3 disposed within the outer shell 1, an air duct assembly, and an air guide plate 8. A cold air inlet 12 and a hot air outlet 13 are provided on the outer shell 1. The air duct assembly is provided with an air inlet duct 51 connecting the cold air inlet 12 and the frying drum 3, and an air outlet duct 52 connecting the frying drum 3 and the hot air outlet 13. A fan 4, a heating element 61, and a uniform air column 53 are disposed within the air inlet duct 51. In some embodiments, the fan 4 can be a centrifugal or rotary blower, and the heating element 61 can be a mica heating element 61. When heating food, the fan 4 and the heating element 61 are activated. The fan 4 drives airflow for heating along the cold air inlet 12, the air inlet duct 51, the frying drum 3, the air outlet duct 52, and the hot air outlet 13. The air guide plate 8 is disposed between the air inlet duct 51 and the frying drum 3. Around the air outlet direction of the air inlet duct 51, the air guide plate 8 has circumferentially oriented air guide holes 84. The hot air ejected from the air inlet 51, while being hindered from circumferential diffusion by the air guide plate 8, is sprayed from multiple points onto the frying drum 3 along the air guide holes 84, making the distribution of hot air injected into the frying drum 3 more uniform and improving the uniformity of heating of the food inside the frying drum 3. The axis of the uniform air column 53 is set along the air outlet direction of the air inlet 51. The hot air flowing inside the air inlet 51 flows around the uniform air column 53 and is ejected from the air inlet 51 in a ring, making the air pressure distribution of the hot air ejected from the air inlet 51 more uniform, which facilitates the guidance of the hot air by the air guide plate 8, further improving the uniformity of the distribution of hot air injected into the frying drum 3, making the heating of the food more uniform.

[0028] In some embodiments, the center of the air guide plate 8 is aligned with the air outlet of the air inlet, and the center of the air guide plate 8 is provided with the largest air guide hole 84. Around the center of the air guide plate 8, other air guide holes 84 are evenly opened on the air guide plate 8, and the diameter of the air guide holes 84 that are not located at the center of the air guide plate 8 gradually increases in the direction away from the center of the air guide plate 8.

[0029] Please refer to Figure 1 , Figure 3 and Figure 5The air guide plate 8 is a frustum shape, higher in the center and lower around the edges. That is, the air guide plate 8 gradually moves away from the center of the air duct assembly. Utilizing the inclined outer surface of the air guide plate 8, the airflow blown by the fan 4 is diffused in a ring shape. This also reduces the resistance encountered by hot air impacting the air guide plate 8, ensuring efficient circulation of hot air within the air fryer. Near the air duct assembly, the surface of the air guide plate 8 has protruding air guide ribs 83. These ribs 83 are arranged radially around the center of the air guide plate 8. Three or more air guide ribs 83 can be provided, dividing the airflow into multiple parallel airflows and guiding multiple airflows to diffuse circumferentially, ensuring that hot air flows 360° along the air guide plate 8 and covers the entire surface inside the air fryer.

[0030] Preferably, an air guide shroud 7 is fitted onto the air duct assembly around the air outlet direction of the air inlet duct 51. The area of ​​the air guide shroud 7 gradually increases towards the frying drum 3, forming a frustum shape. An air guide plate 8 is disposed at the end of the air guide shroud 7 near the frying drum 3. After the hot air ejected from the air inlet duct 51 impacts the air guide plate 8, it diffuses circumferentially along the air guide plate 8 and flows along the inner wall of the air guide shroud 7. The inner wall of the frustum-shaped air guide shroud 7 can guide the hot air to diffuse circumferentially and flow towards the frying drum 3. In some embodiments, a first air guide extension 81 and a second air guide extension 82 are provided on the opposite side of the air guide plate 8. A connecting hole 71 is provided on the air guide shroud 7, and the first air guide extension 81 extends into the connecting hole 71, engaging the air guide shroud 7 and the air guide plate 8. The second air guide extension 82 is connected to the air guide shroud 7 by screws (not shown in the figure), fixing the air guide shroud 7 and the air guide plate 8 together. When connecting the air guide plate 8 and the air guide cover 7, firstly, the relative positions of the air guide cover 7 and the air guide plate 8 are positioned by snapping the first air guide extension 81 and the connecting hole 71, and then the air guide cover 7 and the air guide plate 8 are connected by screws to fix the position between the air guide plate 8 and the air guide cover 7.

[0031] More preferably, an annular gap 85 is formed between the air guide plate 8 and the air guide shroud 7 around the air outlet direction of the air inlet duct 51. The hot air flowing along the air guide plate 8 and the air guide shroud 7 can be sprayed in an annular shape towards the frying barrel 3 along the annular gap 85 at the end, which avoids the formation of a hot air dead zone between the air guide plate 8 and the air guide shroud 7 while ensuring the uniformity of the distribution of hot air sprayed towards the frying barrel 3.

[0032] Please refer to Figure 1 and Figure 3 Ventilation holes 31 are provided on the frying drum 3. That is, the hot air injected into the frying drum 3 can flow out of the frying drum 3 through the ventilation holes 31, and the hot air outside the frying drum 3 can also flow back into the frying drum 3 through the ventilation holes 31, so that the hot air can cover the entire surface of the food inside the frying drum 3 in a circumferential manner, thereby improving the uniformity of heating of the food.

[0033] Preferably, the diameter of the frying drum 3 gradually decreases towards the bottom. A grill rack 32 is installed inside the frying drum 3. The grill rack 32 abuts against the wall of the frying drum 3. The grill rack 32 can be suspended in the middle section of the frying drum 3. The bottom of the grill rack 32 is suspended, which facilitates the entry of hot air into the bottom surface covering the food, improving the uniformity of heating.

[0034] More preferably, a reflector 2 is also provided inside the outer casing 1. The frying drum 3 is disposed inside the reflector 2. The air inlet duct 51 extends into the reflector 2. A reflective air outlet 21 is provided on the reflector 2 to connect the frying drum 3 and the air outlet duct 52. The reflector 2 can be made of metal. The reflector 2 reflects the heat that would otherwise be dissipated to the outside of the frying drum 3, reducing heat loss. At the same time, the reflector 2 isolates the frying drum 3 from the cavity 11, reducing the temperature inside the cavity 11 and protecting the components inside the cavity 11.

[0035] Please refer to Figure 1 , Figure 3 and Figure 4 The air duct assembly includes an upper air duct cover 5 and a lower air duct cover 6. The upper air duct cover 5 and the lower air duct cover 6 are coupled to form an air inlet duct 51 and an air outlet duct 52. In some embodiments, the upper air duct cover 5 and the lower air duct cover 6 can be connected by a snap-fit ​​structure or screws. The upper air duct cover 5 and the outer shell 1, as well as the lower air duct cover 6 and the outer shell 1, can also be connected by screws; this application does not limit this. In other embodiments, the upper air duct cover 5 is recessed to form a uniform air column 53, i.e., the uniform air column 53 and the upper air duct cover 5 are integrally formed. Integrating the uniform air column 53 and the upper air duct cover 5 reduces the number of parts, facilitating assembly while ensuring structural strength. A hot air vent 62 is provided on the lower air duct cover 6 to connect the fryer barrel 3 and the air outlet duct 52.

[0036] Preferably, the air inlet duct 51 includes a first air section 511 and a second air section 512. The flow path within the first air section 511 is perpendicular to the air outlet direction of the air inlet duct 51. An air distribution column 53 is disposed within the second air section 512, causing the air within the first air section 511 to flow perpendicularly toward the air distribution column 53, and then flow in a ring around the surface of the air distribution column 53.

[0037] More preferably, the air duct assembly also has a small-diameter through-hole (not shown in the figure). The axis of the through-hole is perpendicular to the air flow direction in the air inlet duct at the location of the through-hole. The through-hole connects the air inlet duct 51 and the cavity 11 of the outer casing 1. The through-hole connects the air inlet duct 51 between the cold air inlet 12 and the heating element 61. When the fan 4 is started, negative pressure may be generated in the air inlet duct 51 due to the rapid airflow. The through-hole can introduce air into the air inlet duct 51 to balance the negative pressure. During heating, the air pressure in the air inlet duct 51 may increase due to the effect of thermal expansion and contraction. The through-hole can discharge some of the air in the air inlet duct 51 to reduce the pressure in the air inlet duct 51. The through-hole improves the stability of the airflow in the air inlet duct 51, further improving the uniformity of food heating.

[0038] The specific workflow of this utility model is as follows: The user places the food on the grill rack 32 and then turns on the fan 4 and the heating element 61. The fan 4 drives the airflow along the cold air inlet 12, the air inlet duct 51, the frying drum 3, the air outlet duct 52, and the hot air outlet 13. The air is heated in the air inlet duct 51 before flowing into the frying drum 3 to heat the food inside. When the air flows into the second air section 512 along the first air section 511, it impacts the uniform air column 53 in the second air section 512 to form an annular airflow, and then is sprayed into the annular air guide plate 8. The air impacting the air guide plate 8 flows along the surface of the air guide plate 8. During the flow, some of the air flows towards the frying drum 3 along the air guide hole 84, and the other part flows towards the frying drum 3 along the annular gap 85 to heat the food inside the frying drum 3.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An air fryer that heats evenly, characterized in that, The uniformly heated air fryer includes an outer shell, a frying drum disposed within the outer shell, an air duct assembly, and an air guide plate. A cold air inlet and a hot air outlet are provided on the outer shell. The air duct assembly is provided with an air inlet connecting the cold air inlet and the frying drum, and an air outlet connecting the frying drum and the hot air outlet. A fan, a heating element, and a uniform air column are disposed within the air inlet. The axis of the uniform air column is arranged along the air outlet direction of the air inlet. The air guide plate is disposed between the air inlet and the frying drum. Around the air outlet direction of the air inlet, the air guide plate has circumferentially oriented air guide holes.

2. The air fryer with uniform heating as described in claim 1, characterized in that: The air inlet duct includes a first air section and a second air section; the flow path in the first air section is perpendicular to the air outlet direction of the air inlet duct; the uniform air column is disposed in the second air section.

3. The air fryer with uniform heating as described in claim 1, characterized in that: The air guide plate has a shape that is high in the middle and low around the edges; that is, the air guide plate gradually moves away from the air duct assembly in the direction away from the center of the air guide plate; the surface of the air guide plate near the air duct assembly is provided with protruding air guide ribs; the air guide ribs are arranged radially around the center of the air guide plate.

4. The air fryer with uniform heating as described in claim 1, characterized in that: Around the air outlet direction of the air inlet duct, an air guide hood is fitted on the air duct assembly; the area of ​​the air guide hood gradually increases towards the frying barrel; the air guide plate is located at the end of the air guide hood near the frying barrel.

5. The air fryer with uniform heating as described in claim 4, characterized in that: Around the air outlet direction of the air inlet duct, an annular gap is formed between the air guide plate and the air guide shroud.

6. The air fryer with uniform heating as described in claim 1, characterized in that: Ventilation holes are provided on the frying barrel.

7. The air fryer with uniform heating as described in claim 1, characterized in that: The diameter of the frying barrel gradually decreases towards the bottom; a grill is installed inside the frying barrel; the grill abuts against the barrel wall.

8. The air fryer with uniform heating as described in claim 1, characterized in that: The air duct assembly is also provided with a through hole; the through hole connects the air inlet duct and the cavity of the outer shell; the through hole connects the air inlet duct between the cold air inlet and the heating element.

9. The air fryer with uniform heating as described in claim 1, characterized in that: The air duct assembly includes an upper air duct cover and a lower air duct cover; the upper air duct cover and the lower air duct cover are coupled to form an air inlet duct and an air outlet duct.

10. The air fryer with uniform heating as described in claim 1, characterized in that: The outer shell is also equipped with a reflector; the frying barrel is placed inside the reflector; the air inlet extends into the reflector; and a reflective air outlet is provided on the reflector to connect the frying barrel and the air outlet.

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