A dual heating air fryer

Abstract

The utility model relates to double heating air fryer, including shell, setting up the air duct subassembly of shell, bottom plate and the frying bucket, the cold air inlet and hot air outlet are seted up on the shell, the air duct subassembly includes the air inlet duct that intercommunication cold air inlet and the frying bucket, the air outlet duct that intercommunication frying bucket and hot air outlet and set up in the first heating body and fan of air inlet duct, the second heating body and heat conduction cover plate are seted up on the bottom plate, the second heating body is embedded bottom plate, and the heat conduction cover plate is covered and set on the second heating body, the frying bucket sets up between the air duct subassembly and bottom plate, places the food material in the frying bucket, the utility model sets up the second heating body in the opposite side of the frying bucket of first heating body, the air that is heated by first heating body starts heating food material and losing heat after spraying into the frying bucket from top, until the air flows to the bottom of frying bucket, second heating body heats the air again at this time, guarantees the temperature of the air in the frying bucket, promotes the uniformity of food material heating in the frying bucket.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a dual-heating air fryer. Background Technology

[0002] Air fryers heat food by circulating hot air, producing a crispy, fried texture without oil. They are healthy, low-fat, and easy to use.

[0003] The uniformity of food heating is a core indicator of an air fryer's performance. Air fryers use hot air circulation to heat food. As the hot air moves away from the air inlet, its heat is gradually transferred to the container and food. This causes the temperature of the hot air further away from the air inlet to decrease, resulting in a slower heating rate for the food in that area and thus uneven heating.

[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 a dual-heating air fryer to improve the uniformity of heating in the air fryer.

[0006] The technical solution of this utility model is as follows: The dual-heating air fryer includes an outer shell, an air duct assembly housed within the outer shell, a bottom plate, and a frying drum. The outer shell has a cold air inlet and a hot air outlet. The air duct assembly includes an air inlet duct connecting the cold air inlet and the frying drum, an air outlet duct connecting the frying drum and the hot air outlet, and a first heating element and a fan housed within the air inlet duct. A second heating element and a heat-conducting cover are mounted on the bottom plate. The second heating element is embedded in the bottom plate, and the heat-conducting cover is placed over the second heating element. The frying drum is positioned between the air duct assembly and the bottom plate. Food is placed inside the frying drum.

[0007] A further technical solution involves creating an installation groove on the base plate, with the second heating element positioned within the groove.

[0008] A further technical solution involves an annular groove at the bottom of the mounting groove, along its outer edge. A flange is provided at the outer edge of the heat-conducting cover plate, extending into the annular groove.

[0009] A further technical solution involves creating a positioning hole within the annular groove. An extension is provided on the side of the heat-conducting cover plate facing the base plate. The extension passes through the base plate along the positioning hole.

[0010] A further technical solution involves installing a screw on the heat-conducting cover plate. The screw passes through the second heating element and the base plate.

[0011] A further technical solution involves connecting the outer edge of the base plate to the outer shell. A bottom gap is formed between the side of the base plate away from the frying drum and the outer shell. A power supply structure is installed within the bottom gap.

[0012] A further technical solution is that the first heating element can be a mica heating element, and the second heating element can be a mica heating plate.

[0013] A further technical solution involves placing an air guide hood around the air inlet of the air duct. An air guide plate is fitted onto the air duct assembly. An air guide hood is positioned at the open end of the air guide hood near the air outlet of the air inlet. A mixing chamber, connecting the air duct to the frying bucket, is formed between the air guide hood and the air guide plate. The air outlet of the air inlet is located within the mixing chamber.

[0014] A further technical solution is to have air guide holes opened circumferentially on the air guide plate around the air outlet of the air inlet duct, and to set an annular gap between the air guide plate and the air guide cover.

[0015] 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 is coupled to the lower air duct cover, forming an air inlet duct and an air outlet duct between the upper and lower air duct covers.

[0016] The beneficial technical effects of this utility model are as follows: (1) The dual-heating air fryer of this utility model is provided with an air inlet duct, an air outlet duct, a fan, a first heating element, and a second heating element. The air drawn by the fan is heated by the first and second heating elements, thereby heating the food in the frying drum. The first and second heating elements are located on opposite sides of the frying drum. The air heated by the first heating element is sprayed into the frying drum from the top and begins to heat the food while losing heat until the air flows to the bottom of the frying drum. At this time, the second heating element heats the air again, ensuring the temperature of the air in the frying drum and improving the uniformity of heating of the food in the frying drum. The second heating element is embedded in the bottom plate and covered by a heat-conducting cover plate, which prevents the second heating element from being exposed to oil stains and requiring frequent cleaning.

[0017] (2) Furthermore, the heat-conducting cover plate is provided with a screw and a cover plate extension. When assembling the second heating element, the cover plate extension can be inserted into the positioning hole to position the positional relationship between the heat-conducting cover plate and the base plate. Then, the screw threadedly connects and fixes the heat-conducting cover plate and the base plate, simplifying the assembly between the heat-conducting cover plate and the base plate.

[0018] (3) Further, the first heating element can be a mica heating element. The second heating element can be a mica heating plate. Compared with common stainless steel heating tubes or die-cast heating plates, mica heating elements and mica heating plates have advantages in terms of volume and weight, which can reduce the weight of the dual-heating air fryer and reduce the overall height of the dual-heating air fryer. Attached Figure Description

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

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

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

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

[0023] Figure 5 A three-dimensional structural diagram of the bottom plate, the second heating element, and the heat-conducting cover plate in a dual-heating air fryer according to an embodiment of the present disclosure is shown.

[0024] Figure 6 A partially enlarged view of a dual-heating air fryer according to an embodiment of the present disclosure is shown at point A.

[0025] Marked in the attached diagram: 1. Outer shell; 11. Cavity; 12. Cold air inlet; 13. Hot air outlet; 2. Air duct assembly; 21. Air duct top cover; 211. Air inlet duct; 212. Air outlet duct; 22. Air duct bottom cover; 23. First heating element; 24. Fan; 3. Base plate; 31. Second heating element; 32. Heat-conducting cover plate; 321. Flanged edge; 322. Cover plate extension; 33. Screw; 34. Mounting groove; 35. Annular groove; 351. Positioning hole; 36. Bottom gap; 4. Air guide hood; 41. Mixing chamber; 5. Air guide plate; 51. Air guide hole; 52. Annular gap; 6. Frying drum; 61. Vent hole; 62. Grill rack; 7. Reflector. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] Figure 1 An exploded structural diagram of a dual-heating air fryer according to an embodiment of the present disclosure is shown. Figure 2 A top view of a dual-heating air fryer according to an embodiment of the present disclosure is shown. Figure 3 A cross-sectional view of a dual-heating air fryer according to an embodiment of the present disclosure is shown at point B. Figure 4 A cross-sectional view at point C is shown of a dual-heating air fryer according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4The dual-heating air fryer includes an outer shell 1, an air duct assembly 2 disposed within the outer shell 1, a bottom plate 3, and a frying drum 6. The outer shell 1 also includes a drive mechanism connecting a fan 24 and a first heating element 23, such as a power supply and power circuit. A cold air inlet 12 and a hot air outlet 13 are provided on the outer shell 1. The air duct assembly 2 includes an air inlet duct 211 connecting the cold air inlet 12 and the frying drum 6, an air outlet duct 212 connecting the frying drum 6 and the hot air outlet 13, and a first heating element 23 and a fan 24 disposed within the air inlet duct 211. In some embodiments, the fan 24 can be a centrifugal or rotary blower. A second heating element 31 and a heat-conducting cover plate 32 are disposed on the bottom plate 3. In some embodiments, the heat-conducting cover plate 32 can be made of aluminum alloy. The second heating element 31 is embedded in the bottom plate 3, and the heat-conducting cover plate 32 covers the second heating element 31. In some embodiments, the first heating element 23 can be a mica heating element, and the second heating element 31 can be a mica heating plate. Compared to common stainless steel heating elements or die-cast heating plates, mica heating elements and mica heating plates offer advantages in terms of size and weight, reducing the weight and overall height of the dual-heating air fryer. The frying drum 6 is positioned between the air duct assembly 2 and the base plate 3. Food is placed inside the frying drum 6. Air drawn by the fan 24 is heated by the first heating element 23 and the second heating element 31, thereby heating the food inside the frying drum 6. The first heating element 23 and the second heating element 31 are positioned opposite each other in the frying drum 6. The air heated by the first heating element 23 is injected into the frying drum 6 from the top, heating the food and dissipating heat until the air reaches the bottom of the frying drum 6. At this point, the second heating element 31 reheats the air, ensuring the temperature of the air inside the frying drum 6 and improving the uniformity of heating of the food. The second heating element 31 is embedded in the base plate 3 and covered by a heat-conducting cover 32, which prevents the second heating element 31 from being exposed to oil stains and requiring frequent cleaning.

[0029] Specifically, the air duct assembly 2 includes an upper air duct cover 21 and a lower air duct cover 22. The upper air duct cover 21 is coupled to the lower air duct cover 22, forming an air inlet duct 211 and an air outlet duct 212 between the upper air duct cover 21 and the lower air duct cover 22. In some embodiments, the upper air duct cover 21 and the lower air duct cover 22, the upper air duct cover 21 and the outer casing 1, and the lower air duct cover 22 and the outer casing 1 can be connected by screws (not shown in the figure).

[0030] In some embodiments, the cold air inlet 12 and the hot air outlet 13 can each be composed of multiple holes to reduce the entry of foreign objects into the housing 1.

[0031] Figure 5 A three-dimensional structural diagram of the bottom plate, the second heating element, and the heat-conducting cover plate in a dual-heating air fryer according to an embodiment of this disclosure is shown. Please refer to... Figure 1 and Figure 5An installation groove 34 is provided on the base plate 3, and the second heating element 31 is placed in the installation groove 34 to embed the second heating element 31 into the base plate 3, so as to avoid the second heating element 31 protruding from the base plate 3 and interfering with the frying barrel 6 and other components.

[0032] Preferably, along the outer edge of the mounting groove 34, an annular groove 35 is also formed at the bottom of the mounting groove 34. A flange 321 is provided at the outer edge of the heat-conducting cover plate 32. The flange 321 extends into the annular groove 35 to limit the relative position between the heat-conducting cover plate 32 and the base plate 3, thereby enhancing the stability of the connection between the cover plate and the base plate 3.

[0033] More preferably, a positioning hole 351 is provided in the annular groove 35. A cover plate extension 322 is provided on the side of the heat-conducting cover plate 32 facing the base plate 3. The cover plate extension 322 passes through the base plate 3 along the positioning hole 351, quickly positioning the position between the heat-conducting cover plate 32 and the base plate 3, which facilitates the assembly between the heat-conducting cover plate 32 and the base plate 3.

[0034] Figure 6 A partially enlarged view of point A is shown of a dual-heating air fryer according to an embodiment of this disclosure. Please refer to... Figure 3 , Figure 4 and Figure 6 A screw 33 is provided on the heat-conducting cover plate 32. The screw 33 passes through the second heating element 31 and the base plate 3. In some embodiments, a nut (not shown in the figure) may be provided on the screw 33, and the second heating element 31 and the base plate 3 are disposed between the nut and the heat-conducting cover plate 32. An elastic metal washer (not shown in the figure) may also be provided between the nut and the base plate 3 to prevent loosening and compensate for preload, thereby enhancing the connection stability between the base plate 3, the second heating element 31, and the heat-conducting cover plate 32.

[0035] Preferably, the outer edge of the base plate 3 is connected to the outer shell 1. In some embodiments, the outer edge of the base plate 3 and the outer shell 1 can be connected by screws. A bottom gap 36 is formed between the side of the base plate 3 away from the fryer 6 and the outer shell 1. The bottom gap 36 facilitates the installation of a power supply structure for connecting the second heating element 31.

[0036] More preferably, a reflector 7 is also provided inside the outer casing 1. The frying drum 6 is disposed inside the reflector 7. The air inlet duct 211 extends into the reflector 7. The reflector 7 has holes that connect the frying drum 6 and the air outlet duct 212. The reflector 7 can be made of metal. The reflector 7 reflects the heat that would otherwise dissipate to the outside of the frying drum 6, reducing heat loss. At the same time, the reflector 7 isolates the frying drum 6 from the cavity 11, reducing the temperature inside the cavity 11 and protecting the components inside the cavity 11. The lower cover 22 of the air duct can be disposed on the reflector 7 and supported by the reflector 7.

[0037] Please refer to Figure 1Ventilation holes 61 are provided on the frying drum 6. Hot air injected into the frying drum 6 can flow out of the frying drum 6 through the ventilation holes 61, and hot air outside the frying drum 6 can also flow back into the frying drum 6 through the ventilation holes 61, so that the hot air can cover the entire surface of the food inside the frying drum 6 in a circumferential manner, further improving the uniformity of heating of the food.

[0038] Preferably, the diameter of the frying drum 6 gradually decreases towards the bottom. A grill rack 62 is installed inside the frying drum 6. The grill rack 62 abuts against the wall of the frying drum 6. The grill rack 62 can be suspended in the middle of the frying drum 6. The bottom of the grill rack 62 is suspended, which facilitates the entry of hot air into the bottom surface covering the food, improving the uniformity of heating.

[0039] Please refer to Figure 1 , Figure 3 and Figure 4 The air inlet 211 is surrounded by an air outlet. An air guide shroud 4 is fitted onto the air duct assembly 2. An air guide plate 5 is installed at the open end of the air guide shroud 4 near the air outlet of the air inlet 211. A mixing chamber 41, connecting the air guide shroud 4 and the air guide plate 5, is formed between them, communicating with the frying drum 6. The air outlet of the air inlet 211 is located within the mixing chamber 41. The hot air ejected from the air inlet 211 first enters the mixing chamber 41, where it is thoroughly mixed before flowing into the frying drum 6 to heat the food, ensuring uniform heating. In some embodiments, the air guide shroud 4 and the air guide plate 5 are connected by screws. In some embodiments, the outlet of the air inlet 211 can be annular, ejecting hot air in a ring shape to facilitate uniform mixing of the hot air within the mixing chamber.

[0040] Preferably, around the air outlet of the air inlet duct 211, the air guide plate 5 has circumferentially oriented air guide holes 51, and an annular gap 52 is provided between the air guide plate 5 and the air guide cover 4. The hot air in the mixing chamber 41 is sprayed at multiple points along the air guide holes 51 and the annular gap 52 onto the food in the frying bucket 6, ensuring that the hot air is evenly sprayed onto and envelops the food, thereby improving the uniformity of food heating.

[0041] More preferably, the area of ​​the air guide shroud 4 gradually increases towards the frying drum 6, forming a frustum shape. After the hot air ejected from the air inlet 211 impacts the air guide plate 5, it diffuses circumferentially along the air guide plate 5 and flows along the inner wall of the air guide shroud 4. The inner wall of the frustum-shaped air guide shroud 4 can guide the hot air to diffuse circumferentially and flow towards the frying drum 6. The air guide plate 5 can be a frustum shape with a higher center and lower edges. That is, the air guide plate 5 gradually moves away from the center of the air guide plate 5 from the air duct assembly 2. Utilizing the inclined outer surface of the air guide plate 5, the airflow blown by the fan 24 can be diffused in a ring. This also reduces the resistance encountered by the hot air when impacting the air guide plate 5, ensuring the efficient circulation of hot air inside the air fryer.

[0042] The specific workflow of this utility model is as follows: The user places the food into the frying drum 6 and starts the fan 24, the first heating element 23, and the second heating element. Air is drawn in by the fan 24 along the cold air inlet 12, air inlet duct 211, mixing chamber 41, frying drum 6, air outlet duct 212, and hot air outlet 13. The drawn air is heated as it flows through the air inlet duct 211 and then flows into the mixing chamber 41. The hot air in the mixing chamber 41 is evenly mixed and flows into the frying drum 6 along the air guide hole 51 and the annular gap 52 to heat the food. Air flowing to the bottom of the frying drum 6 is reheated by the second heating element 31 to prevent uneven heat exchange. Finally, the heated air flows through the holes into the air outlet 212 and out of the dual-heating air fryer along the hot air outlet 13.

[0043] 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.

[0044] 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. A dual-heating air fryer, characterized in that, The dual-heating air fryer includes an outer shell, an air duct assembly disposed within the outer shell, a bottom plate, and a frying drum; the outer shell has a cold air inlet and a hot air outlet; the air duct assembly includes an air inlet duct connecting the cold air inlet and the frying drum, an air outlet duct connecting the frying drum and the hot air outlet, and a first heating element and a fan disposed within the air inlet duct; the bottom plate is provided with a second heating element and a heat-conducting cover plate; The second heating element is embedded in the base plate, and the heat-conducting cover is placed on the second heating element; the frying drum is disposed between the air duct assembly and the base plate; food is placed inside the frying drum.

2. The dual-heating air fryer as described in claim 1, characterized in that: An installation groove is provided on the base plate, and the second heating element is disposed in the installation groove.

3. The dual-heating air fryer as described in claim 2, characterized in that: Along the outer edge of the mounting groove, there is also an annular groove at the bottom of the mounting groove; a flange is provided at the outer edge of the heat-conducting cover plate; the flange extends into the annular groove.

4. The dual-heating air fryer as described in claim 3, characterized in that: A positioning hole is formed in the annular groove; a cover plate extension is provided on the side of the heat-conducting cover plate facing the base plate; the cover plate extension passes through the base plate along the positioning hole.

5. The dual-heating air fryer as described in claim 1, characterized in that: A screw is provided on the heat-conducting cover plate; the screw passes through the second heating element and the base plate.

6. The dual-heating air fryer as described in claim 1, characterized in that: The outer edge of the base plate is connected to the outer shell; a bottom gap is formed between the side of the base plate away from the frying barrel and the outer shell; a power supply structure is provided in the bottom gap.

7. The dual-heating air fryer as described in claim 1, characterized in that: The first heating element can be a mica heating element, and the second heating element can be a mica heating plate.

8. The dual-heating air fryer as described in claim 1, characterized in that: The air outlet of the air inlet duct is surrounded by an air guide hood; an air guide hood is fitted on the air duct assembly; an air guide plate is provided at the open end of the air guide hood near the air outlet of the air inlet duct; a mixing chamber communicating with the frying barrel is formed between the air guide hood and the air guide plate; the air outlet of the air inlet duct is located in the mixing chamber.

9. The dual-heating air fryer as described in claim 8, characterized in that: Around the air outlet of the air inlet duct, the air guide plate has circumferentially opened air guide holes, and an annular gap is provided between the air guide plate and the air guide cover.

10. The dual-heating air fryer 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 is coupled to the lower air duct cover, forming the air inlet duct and the air outlet duct between the upper air duct cover and the lower air duct cover.

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