Air fryer with high heating efficiency

Abstract

The utility model relates to the field of air fryers, and particularly discloses an air fryer with high heating efficiency, which comprises a fryer main body, and the fryer main body comprises a cooking cavity, a hot air channel and an air source cavity. An air outlet communicated with the hot air channel is formed in the top of the air source cavity, and a centrifugal fan providing air flow power is arranged in the air source cavity. And a wind gathering cover is arranged in the wind source cavity and is provided with a flow guide part which is arranged around the periphery of the impeller of the centrifugal fan. The flow guide part can effectively guide airflow thrown out in the radial direction of the outer edge of the impeller, so that the airflow flows to the air outlet in a concentrated mode. A flow guide grid is arranged at the air outlet and provided with a grid plate extending towards the inclined upper portion. The inclination angle of the horizontal section, relative to the air outlet, of the grating plate is smaller than the inclination angle of at least part of airflow entering the hot air channel from the air outlet, at least part of high-speed airflow with the large inclination angle relative to the horizontal section at the air outlet can be buffered, and airflow turbulence and energy loss are reduced.

Description

Technical Field

[0001] This utility model relates to the field of air fryers, and in particular to an air fryer with high heating efficiency. Background Technology

[0002] With the improvement of people's living standards and the enhancement of health awareness, air fryers, as a new type of kitchen appliance, have gained increasing popularity among consumers because they can cook delicious food with less oil or even no oil. Air fryers use high-speed air circulation technology, heating elements to heat the air, and then using a centrifugal fan to circulate the hot air within the cooking chamber, thereby heating and cooking food to achieve an effect similar to frying, but significantly reducing oil intake and meeting modern people's pursuit of healthy eating.

[0003] However, existing air fryers still have certain shortcomings in terms of heating efficiency. In the structure of traditional air fryers, the airflow generated by the fan in the air source chamber is often not effectively guided and optimized during its outward delivery. After the airflow is radially thrown out from the outer edge of the fan impeller, its flow direction is relatively dispersed, and it cannot be efficiently concentrated at the air outlet and introduced into the cooking chamber. This results in some airflow flowing disorderly and losing energy within the air source chamber, reducing the effective delivery of hot air. Consequently, it affects the heating speed and temperature uniformity within the cooking chamber, leading to longer cooking times and less than satisfactory cooking results.

[0004] In addition, airflow control at the vent is also a key factor affecting heating efficiency. Existing air fryer vent designs are relatively simple, lacking buffering and guiding devices for airflow. When airflow is ejected at high speed from the vent, its steep angle may cause it to directly face the top of the hot air channel, easily generating eddies and airflow turbulence within the channel, further increasing energy loss and affecting cooking efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an air fryer with high heating efficiency, so as to solve the problems of low airflow delivery efficiency and poor airflow control at the air outlet in existing air fryers, which leads to low heating efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An air fryer with high heating efficiency includes an air fryer body, the air fryer body comprising:

[0008] A cooking cavity is defined inside the fryer body;

[0009] A hot air duct is defined at the top of the fryer body, the hot air duct being configured to introduce hot air into the cooking cavity;

[0010] An air source cavity is defined on the side of the fryer body. The top of the air source cavity is provided with an air outlet that connects to the hot air channel. A centrifugal fan that provides airflow is provided inside the air source cavity.

[0011] The air source cavity is provided with an air-gathering hood, which has a guide section arranged around the periphery of the impeller of the centrifugal fan. The guide section is configured to guide the airflow that is radially thrown out along the outer edge of the impeller to the air outlet. The airflow at the air outlet enters the hot air channel obliquely upward.

[0012] The air outlet is provided with a flow guide grille, which is configured with a grille plate extending obliquely upward. The grille plate is configured such that its inclination angle relative to the horizontal section of the air outlet is less than the inclination angle of at least part of the airflow entering the hot air channel from the air outlet, so as to buffer the airflow at least part of the air outlet with a large inclination angle relative to the horizontal section.

[0013] Furthermore, the two ends of the air guide section of the wind concentrator are respectively connected to the two sides of the air outlet, one end of which is the air outlet end; the center of the wind concentrator is offset from the center of the impeller on the side of the air outlet end.

[0014] Furthermore, a heating tube is also provided inside the air source cavity, the heating tube is arranged around the periphery of the impeller, and the air gathering shroud also has a heat insulation part, the heat insulation part is disposed between the cavity wall of the air source cavity and the heating tube.

[0015] Furthermore, the two ends of the heating tube are positioned as cold ends at the bottom of the air source cavity, away from the air outlet.

[0016] Furthermore, the grille has a far-wind end close to the hot air passage and a near-wind end away from the hot air passage, and the grille is configured to extend obliquely from the near-wind end toward the far-wind end toward the airflow direction at the air outlet.

[0017] Furthermore, the airflow guide grille is also equipped with a mounting part, which is fixed to the air outlet, and the grille plates are arranged at intervals on the mounting part.

[0018] Furthermore, a flow divider is provided at the air outlet, the flow divider being located above the air guide grille, and the flow divider being adapted to guide the airflow in the air outlet into the hot air channel from at least two directions.

[0019] Furthermore, the diverter is configured to be biased towards the air outlet side.

[0020] Furthermore, the cooking cavity is provided with a return air vent that connects to the air source cavity, and the return air vent is configured to be arranged relative to the center of the impeller.

[0021] Furthermore, a frying basket is removably provided inside the cooking cavity, and the side wall of the frying basket is provided with ventilation holes that communicate with the cooking cavity.

[0022] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects:

[0023] 1. This utility model, by setting an air-concentrating hood inside the air source cavity, with its guide section arranged around the impeller of the centrifugal fan, can effectively guide the airflow radially thrown out from the outer edge of the impeller to concentrate and flow towards the air outlet. This overcomes the problems of airflow dispersion and energy loss in traditional air fryers. In addition, the guide grille at the air outlet extends obliquely upwards, with its inclination angle being smaller than the inclination direction of some airflow entering the hot air channel, which can effectively buffer the high-speed airflow at the air outlet, reducing airflow turbulence and energy loss.

[0024] 2. The guide section of this utility model's air-collecting hood is connected to both ends of the air outlet, and its center is offset horizontally from the impeller center, further increasing the air outlet diameter and thus significantly improving the air volume. This improves the efficiency of hot air delivery.

[0025] 3. The design of the flow divider in this utility model further optimizes the airflow distribution, guides hot air into the hot air channel from at least two directions, improves the uniformity of hot air transmission, and further reduces energy loss and improves heating efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0027] Figure 1 This is a schematic diagram of the air fryer in an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional view of the air fryer in the first direction in an embodiment of the present invention;

[0029] Figure 3 This is a cross-sectional view of the air fryer in the second direction in an embodiment of the present invention;

[0030] Figure 4 This is a third-party sectional view of the air fryer in this embodiment of the present invention;

[0031] Figure 5This is a schematic diagram of the structure of the wind-gathering shroud in an embodiment of this utility model;

[0032] Figure 6 This is a schematic diagram of the flow guide grille in an embodiment of the present invention.

[0033] Figure label:

[0034] 100. Fryer body;

[0035] 110. Cooking cavity; 111. Return air vent; 112. Frying basket; 1121. Ventilation hole;

[0036] 120. Hot air duct;

[0037] 130. Air source chamber; 131. Centrifugal fan; 132. Air outlet; 133. Air concentrator; 1331. Air guide section; 1332. Heat insulation section; 134. Air guide grille; 1341. Grille plate; 13411. Far end; 13412. Near end; 1342. Mounting section; 135. Heating tube; 1351. Cold end; 136. Flow divider. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] Unless otherwise defined, the technical or scientific terms used in this patent document shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model patent specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or its equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. 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, and therefore should not be construed as a limitation of this utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the features in the following embodiments can be combined with each other.

[0043] Example:

[0044] Please see Figures 1 to 4 The air fryer provided by this utility model includes an air fryer body 100, which internally defines a cooking chamber 110, a hot air channel 120, and an air source chamber 130. The cooking chamber 110 is used to place food to be cooked. The hot air channel 120 is located at the top of the air fryer body 100 and is configured to introduce hot air into the cooking chamber 110 to heat and cook the food. The air source chamber 130 is located on the side of the air fryer body 100, and its top is provided with an air outlet 132 communicating with the hot air channel 120. A centrifugal fan 131 providing airflow is provided inside the air source chamber 130.

[0045] In this embodiment, a wind concentrator 133 is provided inside the air source cavity 130, see [link / reference] Figure 5 The air shroud 133 has a guide section 1331 arranged around the impeller of the centrifugal fan 131. The guide section 1331 can effectively guide the airflow that is radially thrown out along the outer edge of the impeller, so that the airflow is concentrated and flows to the air outlet 132. This design overcomes the problems of airflow dispersion, disordered flow and energy loss in the air source cavity 130 in traditional air fryers, so that the airflow can be more efficiently concentrated to the air outlet 132, preparing for hot air to enter the cooking cavity 110.

[0046] Due to the presence of the centrifugal fan 131 and the air concentrator 133, the airflow at the air outlet 132 enters the hot air passage 120 at an upward angle. This could easily cause the airflow to rush directly and at high speed towards the top of the hot air passage 120, resulting in energy loss. Therefore, a guide grille 134 is installed at the air outlet 132. (See [reference]) Figure 6 The airflow guide grille 134 is equipped with a grille plate 1341 extending obliquely upward. The angle of inclination of the grille plate 1341 relative to the horizontal section at the air outlet 132 is smaller than the angle of inclination of at least part of the airflow entering the hot air passage 120 from the air outlet 132. This arrangement allows the grille plate 1341 to buffer the high-speed airflow at the air outlet 132, which has a relatively large angle of inclination relative to the horizontal section, reducing airflow turbulence and energy loss. It also prevents eddies and turbulence from forming within the hot air passage 120, thereby increasing the effective delivery volume of hot air and improving the heating speed and temperature uniformity within the cooking cavity 110.

[0047] In some embodiments, the guide portion 1331 of the air concentrator 133 is connected to both sides of the air outlet 132, with one end being the air outlet end. The center of the air concentrator 133 is offset from the center of the impeller towards the air outlet end. This structural design can increase the air outlet diameter at the air outlet end, thereby increasing the air volume and further improving the hot air delivery efficiency.

[0048] In some embodiments, a heating tube 135 is also provided inside the air source cavity 130, and the heating tube 135 is arranged around the periphery of the impeller. The air concentrator shroud 133 also has a heat insulation part 1332, which is disposed between the cavity wall of the air source cavity 130 and the heating tube 135. This design can effectively prevent excessive heat generated by the heating tube 135 from being transferred to the cavity wall of the air source cavity 130, improving safety and energy utilization. At the same time, the heat insulation part 1332 can also protect the fan bracket of the centrifugal fan 131, preventing the fan bracket from overheating and damaging the internal circuit wires. Furthermore, it can be understood that, unlike the traditional method of placing the heating tube in the hot air channel at the top of the air fryer, this embodiment places the heating tube 135 inside the air source cavity 130, which can reduce the space occupied at the top of the fryer and effectively reduce the overall height of the machine.

[0049] Furthermore, in this embodiment, both ends of the heating tube 135 are positioned as cold ends 1351 at the bottom of the air source cavity 130, away from the air outlet 132. The cold ends 1351 serve as wire connection ends, and their placement at the bottom of the air source cavity 130 facilitates wire linking and promotes efficient heat distribution and utilization. When the centrifugal fan 131 drives airflow, the airflow first passes through the hot end of the heating tube 135 before leaving the air source cavity, absorbing heat, and then enters the hot air channel 120 through the air outlet 132.

[0050] In some embodiments, the grille 1341 is not only inclined in the vertical direction, but also inclined in the horizontal direction relative to the air outlet 132. Specifically, the grille 1341 has a far-wind end 13411 near the hot air passage 120 and a near-wind end 13412 away from the hot air passage 120, configured to extend inclinedly from the near-wind end 13412 toward the far-wind end 13411 toward the air outlet 132 in the direction of airflow. This inclined extension matches the direction of airflow at the air outlet, enabling precise guidance and effective buffering of the airflow.

[0051] Furthermore, in some embodiments, the airflow guide grille 134 is also equipped with a mounting portion 1342, which is securely fixed to the air outlet 132 by screws or other fixing methods, and the grille plates 1341 are arranged at intervals on the mounting portion 1342. This structural design makes the installation and removal of the airflow guide grille 134 very convenient, facilitating operation during equipment maintenance and cleaning, while also ensuring the stability and reliability of the grille plates 1341 during operation.

[0052] In some specific embodiments, a diverter 136 is also provided at the air outlet 132. The diverter 136 is located above the guide grille 134, and its main function is to further optimize the airflow distribution. The shape and position of the diverter 136 are precisely designed to effectively guide the airflow in the air outlet 132 into the hot air channel 120 from at least two directions. In actual operation, the diverter 136 acts like an "airflow distributor," redistributing the airflow after it has been buffered and guided by the guide grille 134, making the airflow distribution in the hot air channel 120 more uniform. This multi-directional airflow guidance method effectively avoids local concentration or sparseness of hot air in the hot air channel 120, further improving the uniformity of hot air transmission. At the same time, the reasonable airflow distribution reduces mutual interference and energy loss between airflows, allowing hot air to be transferred to the cooking cavity 110 more efficiently, heating the food evenly, thereby significantly improving the heating efficiency of the air fryer.

[0053] Furthermore, the diverter 136 is configured to be biased towards the air outlet 132 on the air outlet side. This asymmetrical design further optimizes the airflow path, making the airflow distribution within the hot air channel 120 more reasonable, giving full play to the airflow optimization effect of the diverter 136, and further improving the overall performance of the air fryer.

[0054] In some specific embodiments, the cooking chamber 110 is provided with a return air vent 111 connected to the air source chamber 130, and the return air vent 111 is arranged relative to the center of the impeller. This arrangement ensures that the air in the cooking chamber 110 can smoothly flow back into the air source chamber 130 under the action of the centrifugal fan 131, forming a complete and efficient air circulation system. During the operation of the air fryer, after the hot air enters the cooking chamber 110 from the hot air channel 120 to heat the food, the temperature will drop. At this time, through the return air vent 111, this low-temperature air can flow back to the air source chamber 130 in time, where it is reheated by the heating tube 135, and then enters the hot air channel 120 through the centrifugal fan 131 and the air outlet 132, returning to the cooking chamber 110 to heat the food again. This cycle repeats continuously, ensuring that the hot air flows continuously and stably in the cooking chamber 110, maintaining the temperature stability in the cooking chamber, and providing a reliable guarantee for the uniform cooking of food.

[0055] Furthermore, in some specific embodiments, a frying basket 112 is removably disposed within the cooking cavity 110, and ventilation holes 1121 communicating with the cooking cavity 110 are provided on the side wall of the frying basket 112. The size and number of these ventilation holes 1121 are rationally designed so that hot air, after being heated in the frying basket 112, enters the cooking cavity 110 through the ventilation holes 1121, and then enters the air source cavity 130 through the return air vent 111 of the cooking cavity 110 to begin the next cycle.

[0056] The working process or principle of this utility model is as follows:

[0057] When the air fryer is started, the centrifugal fan 131 begins to run at high speed, providing power for the entire air circulation system. At the same time, the heating element 135 is energized and heats up the air in the air source chamber 130. Under the action of the centrifugal fan 131, the air in the air source chamber 130 is radially thrown out from the outer edge by the impeller. At this time, the guide part 1331 of the air concentrator 133 quickly plays its role, guiding these dispersed hot airflows to the air outlet 132, so that the airflow is concentrated and flows towards the air outlet 132 in an orderly manner.

[0058] When the airflow reaches the outlet 132, it first passes through the guide grille 134. The grille 1341 buffers and guides the high-speed, steeply angled airflow, reducing its speed and direction, and minimizing turbulence and energy loss. After being optimized by the guide grille 134, the airflow then enters the hot air channel 120 from at least two directions under the action of the flow divider 136, achieving a uniform distribution of airflow within the hot air channel 120.

[0059] Evenly distributed hot air then enters the frying basket 112 within the cooking chamber 110 to heat and cook the food placed inside. During the heating process, after the hot air has heated the food in the frying basket 112, it enters the cooking chamber 110 through the ventilation holes 1121 on the side wall of the frying basket 112. At this time, the air, which has cooled down after absorbing heat from the food, flows back into the air source chamber 130 through the return air vent 111 of the cooking chamber 110. In the air source chamber, it is reheated by the heating tube 135, and then, under the action of the centrifugal fan 131, it passes through the air concentrator 133, the guide grille 134, and the diverter 136 before entering the hot air channel 120 and the cooking chamber 110, forming a complete and efficient air circulation heating process until the food is cooked.

[0060] In summary, this utility model effectively solves the problems of low airflow delivery efficiency and poor airflow control at the outlet of existing air fryers through the design and optimization of a series of innovative structures such as the air-concentrating hood, the air-guiding grille, and the flow-diverting component. It significantly improves the heating efficiency of the air fryer and brings users a better cooking experience.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An air fryer with high heating efficiency, comprising an air fryer body, the air fryer body comprising: A cooking cavity is defined inside the fryer body; A hot air duct is defined at the top of the fryer body, the hot air duct being configured to introduce hot air into the cooking cavity; An air source cavity is defined on the side of the fryer body. The top of the air source cavity is provided with an air outlet that connects to the hot air channel. A centrifugal fan that provides airflow is provided inside the air source cavity. Its features are: The air source cavity is provided with an air-gathering hood, which has a guide section arranged around the periphery of the impeller of the centrifugal fan. The guide section is configured to guide the airflow that is radially thrown out along the outer edge of the impeller to the air outlet. The airflow at the air outlet enters the hot air channel obliquely upward. The air outlet is provided with a flow guide grille, which is configured with a grille plate extending obliquely upward. The grille plate is configured such that its inclination angle relative to the horizontal section of the air outlet is less than the inclination angle of at least part of the airflow entering the hot air channel from the air outlet, so as to buffer the airflow at least part of the air outlet with a large inclination angle relative to the horizontal section.

2. The air fryer according to claim 1, characterized in that, The two ends of the air guide section of the wind concentrator are respectively connected to the two sides of the air outlet, one end of which is the air outlet end; the center of the wind concentrator is offset from the center of the impeller to the side of the air outlet end.

3. The air fryer according to claim 1, characterized in that, The air source cavity is also equipped with a heating pipe, which is arranged around the periphery of the impeller. The air gathering shroud also has a heat insulation part, which is disposed between the cavity wall of the air source cavity and the heating pipe.

4. The air fryer according to claim 3, characterized in that, The two ends of the heating tube are positioned as cold ends at the bottom of the air source cavity, away from the air outlet.

5. The air fryer according to claim 1, characterized in that, The grille has a far-wind end close to the hot air channel and a near-wind end away from the hot air channel, and the grille is configured to extend obliquely from the near-wind end toward the far-wind end toward the air outlet in the direction of airflow.

6. The air fryer according to claim 1, characterized in that, The airflow guide grille is also equipped with a mounting part, which is fixed to the air outlet, and the grille plates are arranged at intervals on the mounting part.

7. The air fryer according to claim 1, characterized in that, The air outlet is also provided with a flow divider, which is located above the air guide grille. The flow divider is adapted to guide the airflow in the air outlet into the hot air channel from at least two directions.

8. The air fryer according to claim 7, characterized in that, The diverter is configured to be positioned biased towards the air outlet on the air outlet side.

9. The air fryer according to claim 1, characterized in that, The cooking chamber is provided with a return air inlet that connects to the air source chamber, and the return air inlet is arranged relative to the center of the impeller.

10. The air fryer according to claim 1, characterized in that, A frying basket is removably provided inside the cooking cavity, and the side wall of the frying basket is provided with ventilation holes that communicate with the cooking cavity.

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