Air energy fryer

Abstract

An air-source heat pump fryer includes an outer shell and an inner liner disposed therein, with a mounting cavity formed between the top of the inner liner and the outer shell. A heating port is provided on the top of the inner liner, communicating with the mounting cavity. A heating assembly is provided on the heating port, comprising a fan shroud, a heating impeller driven by a motor, a carbon heating tube, and an upper stainless steel heating tube. The fan shroud covers the heating port, and the heating impeller is installed inside the fan shroud. The carbon heating tube is positioned on the top of the inner liner corresponding to the heating port, and the upper stainless steel heating tube is positioned on both the front and rear sides of the carbon heating tube. A lower stainless steel heating tube is provided at the bottom of the inner liner. The beneficial effects of this invention are: the upper stainless steel heating tubes positioned on both the front and rear sides of the carbon heating tube provide stable convection and radiant heat, supplementing the heating range of the carbon tube and ensuring more comprehensive and uniform heat coverage in the top area.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, specifically an air-source heat pump oven / fryer. Background Technology

[0002] Air fryers, as a relatively new kitchen appliance, have gained popularity among consumers in recent years due to their healthy and convenient cooking methods. Their core principle is to use high-speed circulating hot air to heat and cook food, achieving a crispy texture similar to traditional deep-fried foods while reducing the use of oil, thus better meeting the demands of modern healthy eating.

[0003] Currently, there are many types of air fryer ovens on the market, and their heating components generally use stainless steel heating elements as the main heating element. Stainless steel heating elements have advantages such as relatively low cost, simple structure, and ease of mass production, and are therefore widely used in various heating equipment.

[0004] However, existing air fryers, which primarily use stainless steel heating elements, still have some shortcomings that urgently need to be addressed in practical use: 1. Stainless steel heating elements heat up relatively slowly when started, requiring a certain preheating time to reach the set temperature. Furthermore, their heat radiation characteristics mean that heat distribution within the oven cavity may not be uniform, easily leading to uneven heating of food, resulting in some parts being burnt while others remain uncooked, affecting cooking results and food texture.

[0005] 2. Stainless steel heating elements primarily heat through convection and radiation. For certain foods requiring deeper heating or with specific texture requirements, their heat penetration may be insufficient, making it difficult to achieve optimal baking or frying results. For example, it may be difficult to achieve the ideal state of crispy on the outside and tender on the inside, while maintaining moisture. This, to some extent, limits the application range and cooking performance of air fryers.

[0006] 3. Traditional single stainless steel heating element heating mode does not perform satisfactorily when handling some ingredients that are sensitive to heating methods. For example, it may not be able to quickly form a crispy outer crust for meat or ingredients that need to lock in moisture, resulting in excessive internal moisture loss and affecting the flavor. Therefore, further improvements are necessary. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an air-source heat pump fryer that is simple in structure, low in manufacturing cost, highly efficient in heating, and provides uniform and stable heating.

[0008] The purpose of this utility model is achieved in the following way: an air-source heat pump fryer, including an outer shell and an inner liner disposed therein, wherein the top of the inner liner and the outer shell form an installation cavity; The top of the inner liner is provided with a heating port, which is connected to the mounting cavity; The heating port is equipped with a heating assembly, which includes a fan cover, a heating fan wheel driven by a motor, a carbon heating tube, and an upper stainless steel heating tube. The fan cover is placed over the heating port, and the heating fan wheel is installed inside the fan cover; The carbon heating tube is located at the top of the inner liner corresponding to the heating port, and the upper stainless steel heating tube is located on both the front and rear sides of the carbon heating tube. The bottom of the inner liner is equipped with a lower stainless steel heating tube.

[0009] Furthermore, two carbon heating tubes are provided, distributed within the coverage area of ​​the heating port.

[0010] Furthermore, a protective cover is installed on the outside of the carbon heating tube, and the left and right ends of the protective cover are fixed to the side wall of the inner liner.

[0011] Furthermore, the top of the fan shroud is also covered with a heat dissipation shroud, and the heat dissipation shroud and the fan shroud together form a heat dissipation cavity. A heat dissipation fan wheel is installed in the heat dissipation cavity. The heat dissipation fan wheel is coaxially mounted with the heating fan wheel and is driven to rotate by the motor.

[0012] Furthermore, the top of the heat sink is provided with an air inlet that communicates with the mounting cavity, and the rear of the heat sink is connected to an exhaust port located on the back of the outer casing via an exhaust pipe.

[0013] Furthermore, the back of the inner liner is provided with several textured reflective surfaces that bulge inwards.

[0014] The beneficial effects of this utility model are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0015] 2. This utility model has a heating component installed at the top of the inner liner. This component creatively combines a carbon heating tube with an upper stainless steel heating tube to form an "upper mixed heating" mode.

[0016] 3. Carbon heating tubes have excellent far-infrared radiation heating characteristics, enabling rapid heating and strong penetration, allowing for quick and deep heating of the food's interior, making them especially suitable for achieving a crispy exterior and tender interior cooking effect.

[0017] 4. The upper stainless steel heating tubes set on both sides of the carbon heating tube provide stable convection and radiation heat, supplementing the heating range of the carbon tube and ensuring more comprehensive and uniform heat coverage in the top area.

[0018] 5. A stainless steel heating element is installed at the bottom of the inner cavity. This bottom heating system can supplement the heating of food from the bottom up, effectively avoiding the problems of insufficient heating or uneven heating at the bottom of traditional air fryers. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure behind the enclosure panel in the concealed outer shell of this utility model.

[0020] Figure 2 , 3 This is a schematic diagram of the rear structure of the enclosure and door in the concealed outer shell of this utility model.

[0021] Figure 4 This is a schematic diagram of the structure of the present invention after the outer shell is hidden.

[0022] Figure 5 , 6 This is a schematic diagram of the heating component structure in this utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings. An air-source heat pump fryer includes an outer shell 1 and an inner liner 2 disposed therein. An installation cavity 3 is formed between the top of the inner liner 2 and the outer shell 1. A heating port 4 is provided on the top of the inner liner 2, and the heating port 4 is in communication with the installation cavity 3. A heating assembly is provided on the heating port 4. The heating assembly includes a fan shroud 5, a heating fan wheel 7 driven by a motor 6, a carbon heating tube 8, and an upper stainless steel heating tube 9. The fan shroud 5 covers the heating port 4, and the heating fan wheel 7 is installed inside the fan shroud 5. The carbon heating tube 8 is disposed on the top of the inner liner 2 corresponding to the position of the heating port 4, and the upper stainless steel heating tube 9 is disposed on the front and rear sides of the carbon heating tube 8. A lower stainless steel heating tube 10 is provided at the bottom of the inner liner 2.

[0024] In this embodiment: the outer shell 1 and the inner liner 2 constitute the main structure of the fryer, with the inner liner 2 serving as the primary space for food cooking. The mounting cavity 3 between the top of the inner liner 2 and the outer shell 1 provides space for the top heating assembly and air duct. The heating port 4 at the top of the inner liner 2 communicates with the mounting cavity 3, serving as a channel for hot air to enter the cooking chamber.

[0025] The heating component is the core of this invention. When the motor 6 starts, the heating fan 7 driven by it begins to rotate at high speed, drawing air from the mounting cavity 3 through the heating port 4 and blowing it over the carbon heating tube 8 located above the heating port 4. After being powered on, the carbon heating tube 8 rapidly heats up and generates far-infrared rays. Far-infrared rays have extremely strong penetrating power and can quickly and efficiently act directly on the surface and interior of food, achieving rapid heating and deep heating.

[0026] The upper stainless steel heating element 9 also heats up when powered on, primarily heating the airflow through thermal radiation and convection, and baking the food surface. The combination of these two methods rapidly heats the air flowing through the fan shroud 5 to a high temperature, creating a powerful hot airflow. Both elements can also work alternately to adapt to different heating methods at different stages.

[0027] High-temperature hot air enters the cooking cavity of the inner pot 2 through the heating port 4, heating the food from all angles. Simultaneously, the lower stainless steel heating element 10 at the bottom of the inner pot 2 is also energized and heats up, providing supplemental heat to the bottom of the food to ensure even heating and prevent the bottom from becoming undercooked or underheated. The hot air circulates within the cavity, removing moisture from the food surface and creating a crispy outer shell.

[0028] In this embodiment, the combination of the top carbon heating element and the upper stainless steel heating element achieves a synergistic effect of rapid heating and deep heating, compensating for the shortcomings of a single heating method. Combined with the bottom stainless steel heating element, a double-layered, composite heating system is formed, ensuring three-dimensional circulation and uniform distribution of heat within the cavity, significantly improving cooking efficiency and ensuring more even heating of food.

[0029] Two carbon heating tubes 8 are provided, distributed within the coverage area of ​​the heating port 4. In this embodiment, the two carbon heating tubes can form a wider and more uniform far-infrared radiation heating area, ensuring that the air flowing through the heating port and the food below can receive the efficient radiant heat emitted by the carbon tubes over a larger area. Increasing the number of carbon heating tubes can improve the overall heating power at the top, resulting in faster heating within the cavity and further improving cooking efficiency.

[0030] The two rationally distributed carbon fiber tubes avoid the problem of localized overheating or underheating that can occur with a single carbon fiber tube, resulting in more uniform heat distribution both vertically and horizontally, helping to prevent "hot spots" or "cold spots" in food. This enhanced heating capacity and uniformity allow the oven to better handle larger food volumes or cooking tasks requiring higher heat output.

[0031] In one embodiment: a protective cover 11 is also installed outside the carbon heating tube 8, and the left and right ends of the protective cover 11 are fixed to the side wall of the inner liner 2.

[0032] When users are taking food out of the fryer, cleaning the interior, or performing other operations, the protective cover 11 acts as a physical barrier to the carbon heating element 8, effectively isolating the fragile carbon heating element 8 from external objects. Because the protective cover 11 is firmly fixed to the side wall of the inner liner 2, its high structural stability effectively resists accidental external impacts or pressure, thus preventing the carbon heating element from cracking or being damaged due to mechanical impact.

[0033] In one embodiment: the top of the fan shroud 5 is further covered by a heat dissipation shroud 12, and the heat dissipation shroud 12 and the fan shroud 5 together form a heat dissipation cavity 13. A heat dissipation fan wheel 14 is installed inside the heat dissipation cavity 13. The heat dissipation fan wheel 14 is coaxially mounted with the heating fan wheel 7 and is driven to rotate by the motor 6. The heat dissipation shroud 12 covers the top of the fan shroud 5, forming an independent heat dissipation cavity 13 between them. This cavity serves as a key area for heat management, used to collect and dissipate waste heat generated inside the electrical appliance, especially near the motor and heating elements.

[0034] When the motor 6 drives the cooling fan 14 to rotate, the cooling fan draws in cool external air from the mounting cavity 3 or other suitable location and directs it through the cooling cavity 13. This process effectively removes the heat generated by the motor 6 and its surrounding components, preventing these critical components from overheating due to prolonged operation.

[0035] In one embodiment: the top of the heat sink 12 has an air inlet 15 that communicates with the mounting cavity 3, and the rear of the heat sink 12 is connected to the exhaust port 17 located on the back of the outer casing 1 via an exhaust pipe 16. The air inlet 15 at the top of the heat sink 12 communicates with the mounting cavity 3, allowing the cooling fan 14 to smoothly draw relatively cool air from the mounting cavity 3 into the heat sink 13 when it rotates.

[0036] The air heated by the cooling fan 14 will follow a specific path, pass through the exhaust pipe 16 at the tail of the heat sink 12, and finally be discharged into the external environment from the exhaust port 17 located on the back of the outer casing 1. This forms a complete and directional heat dissipation airflow channel.

[0037] In one embodiment, the back of the inner pot 2 is provided with a plurality of textured reflective surfaces 18 protruding inward. In this case, the textured reflective surfaces 18 protruding inward on the back of the inner pot change the surface morphology of the back of the inner pot. When the hot air blown out by the heating fan 7 circulates in the cooking cavity, it encounters these textures, generating more complex and more complete turbulence, thereby significantly enhancing the convective heat transfer efficiency between the hot air and the food surface.

[0038] These textured surfaces also have a certain reflective effect, which can reflect some of the radiant and convective heat back to the center of the cavity, helping the heat to be distributed and concentrated more evenly in the cavity, reducing heat loss, and accelerating the overall heating rate.

[0039] In summary, this design utilizes the outer shell, inner liner, and mounting cavity to construct the main structure and airflow foundation of the fryer. At the top, an innovative composite heating assembly combining carbon fiber heating tubes and upper stainless steel heating tubes is employed. A motor-driven heating fan blows air across these heating elements, creating a powerful and penetrating high-temperature hot air stream. The carbon fiber tubes provide rapid far-infrared radiation heating, while the stainless steel tubes provide stable convection and radiant heat; their synergistic effect ensures rapid heating and efficient output of the hot air. Simultaneously, the lower stainless steel heating tube at the bottom of the inner liner heats the bottom of the food, forming a double-layered, composite, three-dimensional heating system. This achieves efficient and uniform heat distribution within the cavity, shortening cooking time and ensuring consistent doneness of all parts of the food.

[0040] To enhance product safety and durability, this invention adds a protective cover to the carbon heating tube, effectively preventing damage to the carbon tube caused by user misoperation through physical isolation.

[0041] Furthermore, to ensure the long-term stable operation of the appliance, this invention cleverly incorporates an integrated heat dissipation system. The heat dissipation shroud and fan shroud form a heat dissipation chamber, and the heat dissipation fan and heating fan are coaxial and driven by the same motor, simultaneously removing internal heat during cooking. A clear airflow path is established through the air inlet and exhaust pipe / port, effectively carrying away the heat generated by the motor and key components, thereby extending the overall lifespan of the appliance.

[0042] Finally, the inward-convex reflective surface on the back of the inner pot, like a diamond pattern, further optimizes heat convection efficiency and heat reflection, accelerates the heating of the cavity, and helps maintain a constant temperature. At the same time, it ensures the uniform distribution of heat in the cavity, further improving the cooking effect. Therefore, it can be widely used.

[0043] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship 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 component 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. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An air-potato oven, characterized by: It includes an outer shell (1) and an inner liner (2) disposed therein, wherein the top of the inner liner (2) and the outer shell (1) form an installation cavity (3); The inner liner (2) has a heating port (4) at the top, and the heating port (4) is connected to the mounting cavity (3); The heating port (4) is provided with a heating component, which includes a fan cover (5), a heating fan wheel (7) driven by a motor (6), a carbon heating tube (8), and an upper stainless steel heating tube (9). The shroud (5) covers the heating port (4), and the heating fan wheel (7) is installed inside the shroud (5); The carbon heating tube (8) is located at the top of the inner liner (2) corresponding to the heating port (4), and the upper stainless steel heating tube (9) is located on the front and rear sides of the carbon heating tube (8). The bottom of the inner liner (2) is provided with a lower stainless steel heating tube (10).

2. An air-potential fryer as claimed in claim 1, characterized in that: Two carbon heating tubes (8) are provided, distributed within the coverage area of ​​the heating port (4).

3. An air-pot, according to claim 1 or 2, characterized in that: The carbon heating tube (8) is also equipped with a protective cover (11), and the left and right ends of the protective cover (11) are fixed to the side wall of the inner liner (2).

4. The air-potential fryer of claim 1, wherein: The top of the fan cover (5) is also covered by a heat dissipation cover (12), and the heat dissipation cover (12) and the fan cover (5) together form a heat dissipation cavity (13). A heat dissipation fan wheel (14) is installed in the heat dissipation cavity (13). The heat dissipation fan wheel (14) is coaxially installed with the heating fan wheel (7) and is driven to rotate by the motor (6).

5. An air-pot, according to claim 4, characterized in that: The heat sink (12) has an air inlet (15) at the top that is connected to the mounting cavity (3), and the tail of the heat sink (12) is connected to the exhaust port (17) on the back of the outer shell (1) through the exhaust pipe (16).

6. The air-potential fryer of claim 1, wherein: The back of the inner liner (2) is provided with several textured reflective surfaces (18) that protrude inwards.

Images