CN220512710U

CN220512710U - Air frying pan

Info

Publication number: CN220512710U
Application number: CN202321747839.2U
Authority: CN
Inventors: 雷国茂; 单树军; 曹伟; 孙洪蕾; 许智波; 王凯; 段风顺; 杨林; 梁绮颖
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2023-07-04
Filing date: 2023-07-04
Publication date: 2024-02-23
Anticipated expiration: 2033-07-04

Abstract

The embodiment of the application provides an air fryer, including casing, bowl, fan and heating device, be provided with the detachable pot body in the casing, the pot body is including heating chamber, and heating chamber has the entry, and the bowl sets up in the casing to relative with the pot, and the bowl covers the entry, the through-hole has been seted up to the bowl, and the fan includes drive arrangement and flabellum, and the flabellum is located between bowl and the pot body, and heating device sets up between flabellum and the pot body. The air fryer also satisfies the following relationship: h is more than or equal to 0.21 ₁ /H ₀ ≤0.3，H ₀ To the distance between the reflecting cover and the oil filter screen along the height direction of the reflecting cover, H ₁ Is the distance between the fan blade and the heating device along the height direction of the reflecting cover. According to the fan blade and the heating deviceAnd the parameter matching relation of the three parts of the reflecting cover can eliminate potential safety hazards existing between the fan blades and the heating device, ensure the heat exchange efficiency of the air flow and the heating device, and avoid the conditions of thermal shock and the like caused by the air flow.

Description

Air frying pan

Technical Field

The application relates to the field of household appliances, in particular to an air fryer.

Background

As users pursue healthy diets, air fryers are increasingly appearing in the field of view of people. The air fryer evaporates the moisture on the surface of the food through the high-speed circulating hot air flow, so that the food can be cooked by the fryer under the condition of no oil, thereby reducing the intake of grease and making the food healthier. In addition, the air fryer does not need to use oil and water, the operation is simple and convenient, and the cooking speed is also very fast.

In the prior art, air fryers have required a fan and a heating device to cooperate to produce a high-velocity circulating hot air stream. However, the space between the heating device and the rotating fan is too small, so that potential safety hazards may exist; the distance between the heating device and the fan is too large, and the heating effect of the air flow is poor. The size of the various components in the air fryer is therefore particularly important for overall safety and use.

Disclosure of Invention

The present application proposes an air fryer to at least partially ameliorate the above technical problem.

The embodiment of the application provides an air fryer, which comprises a shell, a reflecting cover, a fan and a heating device, wherein a detachable pot body is arranged in the shell, the pot body comprises a heating cavity, the heating cavity is provided with an inlet, the reflecting cover is arranged on the shell and opposite to the pot body, the reflecting cover covers the inlet, the reflecting cover is provided with a through hole, the fan comprises a driving device and fan blades, the driving device is arranged on one side, far away from the pot body, of the reflecting cover, an output shaft of the driving device penetrates through the through hole, the fan blades are arranged on the output shaft and are positioned between the reflecting cover and the pot body, and the heating device is arranged between the fan blades and the pot body;

wherein the air fryer also satisfies the following relationship:

H ₀ to the height of the reflecting cover, H ₁ Is the distance between the fan blade and the heating device along the height direction of the reflecting cover.

In one embodiment, the air fryer also satisfies the following relationship:

wherein D is ₀ For the width of the reflecting cover, D ₁ Is the diameter of the fan blade.

In one embodiment, the air fryer also satisfies the following relationship:

In one embodiment, the air fryer satisfies the following relationship:

wherein H is ₀ To the height of the reflecting cover, H ₂ Is the distance between the fan blade and the reflecting cover along the height direction of the reflecting cover.

In one embodiment, the air fryer satisfies the following relationship:

In one embodiment, the reflecting cover further comprises a top cover and a side cover, the side cover is arranged on the outer edge of the top cover in a surrounding mode, one end, away from the top cover, of the side cover is detachably connected with the inlet of the pot body, and the joint of the top cover and the side cover is in arc transition.

In one embodiment, the air fryer satisfies the following relationship:

wherein R is the arc radius of the arc transition part, H ₀ Is the height of the reflector.

In one embodiment, the air fryer satisfies the following relationship:

In one embodiment, the air fryer further comprises an oil filter screen arranged at the junction of the pot body and the reflecting cover and positioned at one side of the heating device away from the driving device.

In one embodiment, the heat generating device is disposed in a wind path formed by a fan-driven airflow.

The application provides an air fryer, through the air current between fan drive casing and the bowl both, because of fan and the relative setting of heating device, heating device circular telegram produces heat. The air flow driven by the fan can pass through the heating device, the air flow exchanges heat with the heating device to generate hot air flow, and the hot air flow flows to food in the pot body of the shell through the fan and the reflecting cover, so that the food can achieve the cooking effect of the fryer. According to the parameter matching relation among the fan blade, the heating device and the reflecting cover, potential safety hazards existing between the fan blade and the heating device can be eliminated, heat exchange efficiency of air flow and the heating device can be guaranteed, heat shock and other conditions of the air flow are avoided, and use experience of the air fryer is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an air fryer according to an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic diagram of an air fryer in another view according to an embodiment of the present application;

FIG. 4 is a cross-sectional view taken along line B-B in FIG. 3;

FIG. 5 is a schematic illustration of an alternative air fryer in accordance with an embodiment of the present application;

FIG. 6 is a schematic illustration of a still further air fryer in accordance with an embodiment of the present application.

Detailed Description

In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application.

First embodiment:

referring to fig. 1 and 2, an air fryer 100 includes a housing 10, a reflective cover 20, a fan 30 and a heat generating device 40, wherein the housing 10 and the reflective cover 20 are opposite to each other, the fan 30 drives air between the housing 10 and the reflective cover 20 to form an air flow, the heat generating device 40 generates heat, the air flow passes through the heat generating device 40 and exchanges heat to form a hot air flow, and the hot air flow passes through food to be heated placed in the air fryer 100, so that a cooking effect is generated due to the food under the influence of the hot air flow.

A detachable pot body 11 is arranged in the shell 10, and the pot body 11 can be used for containing objects to be fried. The pan body 11 in this embodiment may be made of a non-stick coating material, 304 stainless steel, aluminum alloy or carbon steel.

Specifically, the surface of the non-stick coating pot body 11 is coated with a layer of artificial coating, and the coating is very smooth, so that the frying pot is easier to clean and convenient to cook, and unnecessary grease use can be reduced.

The 304 stainless steel pot body has strong rust resistance and good corrosion resistance, and the pot body 11 made of 304 stainless steel material is more durable and easy to clean.

Aluminum alloy: the aluminum alloy pot body 11 is light in weight, good in heat conduction effect, capable of conducting heat rapidly and suitable for cooking in a short time.

The pan body 11 made of carbon steel has higher weight resistance, wear resistance and corrosion resistance, and can adapt to more cooking demands and occasions.

Referring to fig. 2, the pan body 11 includes a heating cavity 111, which may be configured according to parameters and shapes of the pan body 11, and the heating cavity 111 may be in a shape of a cylinder, a cube, or the like. The number and types of the food to be heated which can be placed are different according to the shape of the heating chamber 111. In one embodiment, the pan 11 may be a hollow cube, and each edge of the cube may be rounded to prevent sharp corners or the like from being formed, and to avoid scratching the user.

The heating cavity 111 has an inlet 112, in an embodiment, the pot 11 may be a hollow cube, and the inlet 112 may be disposed on a partial or complete surface of a surface of the cube, for example, the surface of the cube is removed to form the inlet 112, so that food to be heated and the like may enter the heating cavity 111 through the inlet 112, thereby facilitating the placement task before heating and the meal taking after heating.

With continued reference to FIG. 2, the pan body 11 may also include a bakeware 70. The bakeware 70 is a kitchen utensil accessory for baking food inside the air fryer 100. Bakeware 70 can be made of food grade aluminum alloy and the like and has different specifications and shapes to adapt to different food and baking requirements. When the bakeware 70 is placed in the heating chamber 111, the food to be heated is again placed on the surface of the bakeware 70 facing the hood 20. The bakeware 70 is used to bake various foods in the air fryer 100, so that the surface of the foods is impacted by the hot air flow, and the foods become golden and crisp. The use of the bakeware 70 allows more convenient baking of food, allows more uniform air flow, and also keeps the oven clean and tidy. In one embodiment, during operation of the air fryer 100, the temperature of the pot 11 increases sharply, and the temperature of the pot 11 may increase to several hundred degrees celsius, and the food to be heated may contact the surface of the pot 11, which may cause the occurrence of a burning, sticking, etc. condition, resulting in the failure of the food to be heated or even the destruction of the air fryer 100. The surface of the bakeware 70 facing the hood 20 is provided with a plurality of convex structures, and the food to be heated is placed on the convex structures. The contact area between the pan body 11 and the food to be heated is only the union of one end of the plurality of protruding structures facing the heating cover 20, and the phenomenon that the food to be heated is abutted against the surface of the pan body 11 does not occur. And wait to heat the food and lift through protruding structure, wait to heat and form the space through protruding structure between food and the pot body 11, the space can be used to the hot air through to wait to heat the food all around by even heating, and do not have the condition such as heating effect is not good because of the food is heated unevenly. The parameters such as the height and type of the protruding structures are not unique, and can be comprehensively considered by specific parameters such as the size and fat content of the food to be heated, which is not limited in this embodiment.

In another embodiment, the airflow rates of the heating cavity 111 are different from each other, and there may be a central airflow rate faster than the surrounding airflow rates, and the baking tray 70 may be configured to have a shape with a low center and a low surrounding. And in order to make the food that waits to heat can receive the hot air in center, avoid the air current flow around poor, and then lead to the heating effect not good.

Referring to fig. 2 and 3, the reflective cover 20 may have heat insulation, and the surface of the reflective cover 20 far away from the pot 11 may be sprayed with a heat insulation coating, where the heat insulation coating may be a polytetrafluoroethylene coating, and the heat conduction of the polytetrafluoroethylene coating is poor, so that heat transfer may be insulated. And the polytetrafluoroethylene coating can withstand high temperature of 290 ℃ and prevent damage caused by instant high temperature.

The reflecting cover 20 is provided on the housing 10 and faces the pan body 11, and the reflecting cover 20 covers the inlet 112, and in one embodiment, the reflecting cover 20 forms a housing chamber having an opening provided opposite to the inlet 112. For example, the size parameters, shape, and shape of the inlet 112 and the opening may be the same. And one of the size parameters of the inlet 112 and the opening can be slightly larger than the other, so that one end of one of the pan body 11 and the reflecting cover 20 can be correspondingly inserted into the opening or the inlet 112, and the contact area of the joint of the two can be increased, thereby increasing the air tightness between the two. Or, be provided with the sealing member between the pot body 11 and the reflector 20, the sealing member can butt pot body 11 and the reflector 20, also can increase the gas tightness between the two, avoids the heat to spill outward, causes the condition such as energy loss and appearance scald.

The reflecting cover 20 is provided with a through hole 21, and the through hole 21 can be used for penetrating an output shaft 311 of a driving device 31 described below. In one embodiment, when the output shaft 311 penetrating the through hole 21 needs to rotate, the through hole 21 may be a circular hole, and the reflective cover 20 may be sleeved on the output shaft 311, so that the reflective cover 20 does not interfere with the rotation of the output shaft 311.

Preferably, the through hole 21 is formed on the top cover 22, and may be disposed at the center of the top cover 22. For example, the top cover 22 may be circular, and the axis of the through hole 21 and the axis of the top cover 22 are mutually overlapped, so that the distance between the output shaft 311 disposed on the through hole 21 and the edge of the top cover 22 is the same, and the fan blade 32 with a larger size is conveniently disposed, so that the acting area of the fan 30 is increased, and the generated air flow range is larger.

The reflecting cover 20 comprises a top cover 22 and a side cover 23, the top cover 22 can be arranged in a round shape or other shapes, the shape of the top cover 22 is required to be matched with that of the pot 11, the side cover 23 is arranged around the edge of the top cover 22, and the distance between one end of the side cover 23, which is opened into the top cover 22, and one end of the side cover, which is far away from the top cover 22, is equal to the height of the reflecting cover 20. And is disposed toward the pan body 11 such that the side cover 23 encloses an opening formed toward the pan body 11 such that the reflecting cover 20 and the pan body 11 are disposed to be connected to each other.

The arc transition at the joint of the top cover 22 and the side cover 23 is accompanied by air flow guiding and avoiding risks of being scratched by sharp corners and the like. In one embodiment, the side cover 23 is disposed at one end of the top cover 22 near the pan body 11, and the air flow generated by the fan 30 flows towards the arc, and is further guided to another direction through the arc, so as to realize the change of the flowing direction of the air flow. And the arc transition at the joint can avoid structures such as sharp corners, so that scratch risks are not easy to occur in the mounting and dismounting processes.

The end of the side cover 23 remote from the top cover 22 is detachably connected with the inlet 112 of the pot 11, so that the reflecting cover 20 can form a closed space with the pot 11 when the pot 11 is matched, and the pot 11 is convenient to detach and place the belt to heat food.

In this embodiment, referring to fig. 2, the fan 30 includes a driving device 31 and a fan blade 32, the fan blade 32 is detachably connected to the driving device 31, and the driving device 31 in this embodiment may be a brushless dc motor.

The direct current brushless motor is a direct current motor using electronic commutation, and has the following advantages compared with the traditional alternating current motor:

first, the energy efficiency ratio of a brushless dc motor is higher: the direct current brushless motor can stop and start the motor in a shorter time without current reverse regulation through the traditional commutator, and has lower energy consumption and higher energy efficiency ratio. Secondly, the life of the brushless DC motor is longer: because no friction substance (such as carbon brush) exists in the motor, the friction loss of the motor in the working process is smaller, and the service life is longer. Furthermore, the noise of the brushless DC motor is smaller: the motor has lower noise because the friction generated inside the motor is smaller. Finally, the speed regulation range of the DC brushless motor is wide: the rotating speed adjusting range of the direct current brushless motor is relatively wide, and the direct current brushless motor can adapt to different load and working condition requirements.

The fan blades 32 are classified into radial flow type and axial flow type according to the flow direction of the air flow. The flow direction of the air flow driven by the radial fan blades 32 is a radial direction (along the direction of the fan blades 32 away from the rotation axis), and the flow direction of the air flow driven by the axial fan blades 32 is the rotation axis direction of the fan blades 32. Specifically, the radial fan blades 32 drive the air flow to enter in the axial direction of the fan blades 32 (the rotation axis direction of the fan blades 32, that is, the axis of an output shaft 311 described below), and to exit in the radial direction (the direction away from the rotation axis along the fan blades 32). The axial flow fan blades 32 drive the air flow to enter the air flow in the radial direction of the fan blades 32 and to exit the air flow in the axial direction.

In one embodiment, the blades 32 may be configured in an arc shape, and each blade 32 may have the same arc shape. Compared with the flat blade 32, the arc blade 32 can generate high pressure, and can effectively increase the airflow flow to achieve the airflow driving effect of the blade 32. And relatively speaking, the upper limit of the number of blades 32 in a certain range may be preferentially selected to attenuate noise without affecting efficiency. In short, the parameters such as the number of the blades 32 are limited by the rotation speed of the driving device 31, and the corresponding parameters of the blades 32 can be selected according to the parameters such as the rotation power of the driving device 31.

In another embodiment, the relative angular relationship between the surface of the fan blade 32 and the rotation axis of the fan blade 32 may be determined according to the rotation direction of the air flow guiding and driving device 31 or the air flow speed requirement, for example, the air flow guiding is an axial flow, and the end of the fan blade 32 away from the top cover 22 may be disposed obliquely toward the opposite direction of the rotation direction of the driving device 31, so as to push the air flow to move along the rotation axis of the fan blade and toward the pan body 11 by using the fan blade 32. And the corresponding setting of the parameters of the fan blade 32 is required according to the use scene, the use requirement and the like, and the selection of the parameters is not unique.

Referring to fig. 2, 4 and 5, the driving device 31 is disposed on a side of the reflecting cover 20 away from the pan body 11, so as to prevent heat in the heating cavity 111 from being transmitted to the driving device 31, and interfere with the normal operation of the driving device 31. The output shaft 311 of the driving device 31 is arranged in the through hole 21 in a penetrating way, the diameter of the output shaft 311 can be slightly smaller than the aperture of the through hole 21, so that the output shaft 311 can smoothly penetrate out of the through hole 21, the output shaft 311 can be ensured to smoothly rotate in the through hole 21, heat can be prevented from escaping from the through hole 21, and the energy utilization rate is ensured. The fan blades 32 are arranged on the output shaft 311 and between the reflecting cover 20 and the pan body 11, the driving device 31 is electrified, the output shaft 311 of the driving device 31 rotates, the output shaft 311 drives the fan blades 32 to rotate together, and the fan blades 32 rotate to drive airflow to flow.

In one embodiment, referring to fig. 4, the fan blades 32 drive the air on the output shaft 311 to form an air flow around, so as to realize radial flow of the air flow. The air flow passes through the reflecting cover 20 or the arc of the reflecting cover 20 and then flows into the pot 11, and can be at the edge of the pot 11. As the air flow on the output shaft 311 is driven to the periphery, a negative pressure is generated at the output shaft 311. Under the influence of negative pressure, the air flow at the edge of the pan body 11 flows on the axis of the output shaft 311, and the air flow flows again to the vicinity of the output shaft 311 along the direction close to the emission cover 20, and is driven to the periphery again by the fan blades 32, and is circulated, so that circulating air flow is generated between the pan body 11 and the reflection cover 20. The flow path of the circulating air flow is shown in phantom in fig. 4, which ensures both the air tightness of the air fryer 100 to avoid heat loss and the proper operation of the air fryer 100.

In another embodiment, referring to fig. 5, the fan blades 32 drive the surrounding air onto the output shaft 311 to form an air flow, and the air flow flows along the output shaft 311 to the heating chamber 111, so as to realize an axial flow of the air flow. The air flow flows to the pan body 11 along the direction of the output shaft 311, and may be on the center line of the pan body 11. Because the air flow around the fan blades 32 is driven to the output shaft 311, negative pressure is generated around the fan blades 32, under the influence of the negative pressure, the air flow at the edge of the pot body 11 flows to the edge of the reflecting cover 20 towards the direction of the reflecting cover 20, namely, the air flow flows to the periphery of the fan blades 32, the fan blades 32 drive the output shaft 311 again, and the air flow flows to the heating cavity 111 along the output shaft 311 again, and the circulating air flow is generated between the pot body 11 and the reflecting cover 20 in a circulating way. The flow path of the circulating air flow is shown in phantom in fig. 5, which ensures both the air tightness of the air fryer 100 to avoid heat loss and the proper operation of the air fryer 100.

In this embodiment, the rotation direction of the fan blade 32 and the flowing direction of the air flow are not unique, and may be implemented according to specific application scenarios and parameters such as the type and volume of the food to be heated, which are not limited in this embodiment. For convenience of the following description, the flow direction of the air flow in the following is radial flow type.

With continued reference to fig. 2 and fig. 4, the heating device 40 is disposed between the fan blade 32 and the pan 11, and the heating device 40 may be a heating tube, and the heating tube is electrified to generate heat, so as to promote the passing air flow to exchange heat to realize the circulation of hot air flow. Further, the heating device 40 may be disposed at the junction between the pot 11 and the reflecting cover 20, so that the heating device 40 heats the pot 11 and the reflecting cover 20 more uniformly. It is understood that the heating device 40 may be a stainless steel electric heating tube, a quartz electric heating tube, a teflon electric heating tube, or a titanium electric heating tube, and in this embodiment, the heating device 40 may be a semiconductor material (Positive Temperature Coefficient, PTC) heating element with a very high positive temperature coefficient. The PTC heating element is a heat-sensitive material, the change of the resistivity is in direct proportion to the temperature in a certain voltage range, and the resistance performance is gradually enhanced when the temperature rises, so that the PTC resistance value is increased, and a higher heating effect is generated.

In one embodiment, to ensure that the air flow can smoothly flow to the heat generating device 40, so that the air flow can smoothly heat up through the heat generating device 40, the fan 30 drives the air flow through the fan blades 32 to form a circulating air path, and the heat generating device 40 is disposed on the circulating air path. Further, the projections of the fan blades 32 along the axial direction of the output shaft 311 are all within the effective heating range of the heat generating device 40. The effective heating range of the heat generating device 40 is referred to by temperature, for example, the temperature of the area around the heat generating device 40 exceeds a certain threshold value, which is an effective heating area. For example, the threshold may be set to 200 degrees, and the effective heating area is set when the temperature of the area around the heat generating device 40 exceeds 200 degrees. The air flow driven by the blower 30 can flow in radial direction or axial direction, and can exchange heat smoothly with the heating device 40 through the heating device 40 or the effective area of the heating device 40, so as to ensure the normal operation of the air fryer 100.

In this embodiment, referring to fig. 4, when the hot air flows onto the food to be heated, the meat product containing fat and the like may be heated to generate oil droplets on the surface, and the oil droplets may further evaporate and rise to the heat generating device 40 together with the hot air, so that the heat generating device 40 and the fan blades 32 adhere to the oil droplets, which causes a certain cleaning problem. The air fryer 100 further comprises an oil filter screen 50, wherein the oil filter screen 50 can be formed by overlapping one or more layers of screens, and the oil filter screen 50 is arranged at the junction of the pot body 11 and the reflecting cover 20 and is positioned at one side of the heating device 40 away from the driving device 31. The ascending air current in the pot body 11 can smoothly pass through along with the oily vapor, but the oily vapor and the like along with the ascending air current can be blocked to the junction of the pot body 11 and the reflecting cover 20 by the oil filter screen 50, thereby ensuring the cleanliness of the heating device 40 and the fan blades 32 and ensuring the normal operation of the air fryer 100.

In this embodiment, referring to fig. 6, the air fryer 100 further includes a control device 60, and the control device 60 can be electrically connected to the blower 30 and the heating device 40 to control the power-on states of the blower 30 and the heating device 40, so as to control the working state of the air fryer 100. For example, the positive and negative electrodes at two ends of the fan 30 are changed by the control device 60 to change the rotation direction of the fan 30, thereby changing the flow direction of the air flow; the power of the blower 30 is changed by the control device 60 to change the rotation rate of the blower 30, and the power of the heat generating device 40 is changed by the control device 60 to change the amount of heat generated at both ends of the heat generating device 40. Preferably, the power of the blower 30 is significantly higher than that of the heat generating device 40, which results in too fast airflow speed driven by the blower 30, insufficient heat generated by the heat generating device 40, and insufficient heat exchange efficiency of the airflow, thereby resulting in heating effect of the air fryer 100. The power of the blower 30 and the power of the heating device 40 need to be comprehensively considered, and the power of one of them is singly increased or reduced, which may cause phenomena such as good heating effect or energy waste.

The control device 60 further includes a circuit board, various components and wires disposed on the circuit board, and the like. The circuit board is a substrate formed by alternately stacking conductive layers and insulating layers, and after the surface of the substrate is subjected to photoetching, etching, copper spraying, pressing and other processes, the structures such as wires, connecting holes and the like of the circuit are formed. The circuit board is connected with and supports the electronic components, can ensure the normal work and the signal transmission of circuit, and in this embodiment, the circuit board can include first surface and the second surface that set up in opposite directions. It should be noted that: the terms "first," "second," and the like are used merely to distinguish between descriptions and should not be construed to refer to a particular or a particular structure. The temperature of the circuit board may reach over 90 degrees while the air fryer 100 is continuously operating. In this embodiment, the circuit board may have a regular square structure, so that the circuit board may be mounted conveniently, and meanwhile, components of more types may be adapted. In this embodiment, the circuit board may be one of a single panel, a double panel, a multi-layer board, a rigid board, a flexible board, and a bar flexible board. For example, the air fryer 100 may be a flexible board, which is a circuit board made of flexible material, and is suitable for occasions requiring bending, space reduction or impact resistance, and is more suitable for the air fryer 100 provided in the embodiment of the application.

Further, the circuit board in the embodiment of the present application may be a flexible circuit board (Flexible Printed Circuit, FPC) made of a material such as a Polyester Film (Polyester Film), a Polyimide Film (Polyimide Film), a polytetrafluoroethylene Film (Polytetrafluoroethylene Film), or the like.

Polyester Film (Polyester Film) has good mechanical properties and oxidation stability, and also has good tear resistance, insulation and temperature stability, but has poor conductivity and high temperature resistance compared with other FPC materials.

Polyimide Film (Polyimide Film) has good mechanical strength, heat insulation and stability, and can bear higher temperature and has less influence on the Polyimide Film by electric measurement. Meanwhile, the polyimide FPC can achieve a narrower rebound radius, and is suitable for electronic equipment with higher concentration.

The polytetrafluoroethylene film (Polytetrafluoroethylene Film) has extremely strong chemical inertness and corrosion resistance, and can bear various environments such as low temperature, high air pressure, strong corrosion and the like for a long time. Meanwhile, the polytetrafluoroethylene FPC also has good electrical property and wear resistance, and is suitable for application in important fields such as industry, medical treatment, military and the like.

The user can select different kinds of FPC materials according to actual application scenes and needs, for example, in view of cost, the embodiment of the application can adopt the flexible circuit board made of the polyester film.

In the present embodiment, please continue to refer to fig. 2 and 5, the distance between the fan blade 32 and the heating device 40 affects the heating effect and safety standard, so as to avoid the poor air flow heat exchange efficiency caused by the too large distance between the fan blade 32 and the heating device 40, and further affect the heating effect of the air fryer 100, and eliminate the potential safety hazard caused by the too small distance between the rotating fan blade 32 and the heating device 40. Air fryer 100 may satisfy the following relationship:

wherein H is ₀ For the height of the reflection housing 20, the height of the reflection housing 20 may be a distance from a surface of the top cover 22 near the pot 11 to a surface of the oil filter screen 50 near the top cover 22. H ₁ The distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflective cover 20 may be the shortest distance between the fan blade 32 and the heat generating device 40. Accordingly, the distance between the fan blade 32 and the heating device 40 is limited by the height of the reflecting cover 20, so that potential safety hazards caused by the distance between the fan blade 32 and the heating device can be avoided, and the required heating rate and heat exchange efficiency of the air flow can be met. For example, as the height of enclosure 20 increases, the required airflow rate and heat exchange rate should also increase to allow faster and more distant airflow to ensure the efficiency of air fryer 100.

Illustratively, the height of the reflector 20 is 100mm, the distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflector 20 is 21mm, and the distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflector 20 is 0.21 times the height of the reflector 20.

Specifically, H ₁ /H ₀ The ratio of (c) may be 0.21, 0.23, 0.25, 0.30, 0.32, etc., and embodiments of the present application are not limited.

In the present embodiment, please continue to refer to fig. 2 and 5, the air flows into the pan 11 after passing through the reflective cover 20 or the arc of the reflective cover 20, and may be at the edge of the pan 11. A combination of the flow rate of the air flow and the size of the reflector 20 is required to ensure that the air flow is farther along the reflector 20. Air fryer 100 may satisfy the following relationship:

wherein D is ₀ As for the width of the reflecting cover 20, the top cover 22 in this embodiment is a rectangular top cover, and the width of the reflecting cover 20 may be the width of the top cover 22. And when the junction between the top cover 22 and the side cover 23 has an arc transition, the width of the reflecting cover 20 may be the width of the top cover 22 plus the arc diameter of the arc transition. D (D) ₁ The diameter of the fan blade 32 may be the diameter of the fan blade 32 that rotates to form a rotation area. Thus, the flow rate of the air flow is limited by the diameter of the fan blade 32, for example, at a certain rotation speed and power of the fan blade 32, the flow rate of the air flow is required to be large, and the diameter of the fan blade 32 should be correspondingly increased, so that the flow rate of the air flow can be enough to support the sufficient circulation of the air flow. In addition, the diameter of the fan blade 32 cannot be too large, so that the situation that the flow rate of the air flow is too high to cause the too high flow rate of the air flow is avoided, and the heat exchange efficiency is increased negatively is avoided. The diameter of the fan blades 32 and the width of the reflecting cover 20 should be correspondingly set to ensure a certain air flow rate and heat exchange rate, thereby ensuring the working efficiency of the air fryer 100.

Illustratively, the width of the reflector 20 is 200mm, the diameter of the fan blades 32 is 110mm, and the diameter of the fan blades 32 is 0.55 times the width of the reflector 20.

Specifically, D ₁ /D ₀ The ratio of (c) may be 0.55, 0.60, 0.65, 0.70, 0.71, etc., and embodiments of the present application are not limited.

In this embodiment, referring to fig. 2 and 4, the air flow is driven onto the reflective cover 20 by the fan blades 32, and the distance between the fan blades 32 and the reflective cover 20 affects the air flow direction, for example, the fan blades 32 are far away from the circular arc of the reflective cover 20 along the height direction of the reflective cover 20, the air flow driven by the fan blades 32 flows towards the periphery, the air flow is difficult to change the flow direction gently, and a certain blocking is caused to the air flow. Air fryer 100 may satisfy the following relationship:

wherein H is ₀ For the height of the reflection housing 20, the height of the reflection housing 20 may be a distance from a surface of the top cover 22 near the pot 11 to a surface of the oil filter screen 50 near the top cover 22. H ₂ The distance between the fan blade 32 and the reflecting cover 20 in the height direction of the reflecting cover 20 is the shortest distance between the fan blade 32 and the reflecting cover 20. Therefore, the fan blades 32 can be ensured to be closer to the arc of the reflecting cover 20 to change the airflow direction, and the rotating fan blades 32 can be prevented from being too close to the reflecting cover 20, so that potential safety hazards are avoided. Protecting the proper operation of the air fryer 100 and enhancing the energy utilization of the air fryer 100.

Illustratively, the height of the reflector 20 is 100mm, the distance between the fan blades 32 and the reflector 20 along the height direction of the reflector 20 is 8mm, and the distance between the fan blades 32 and the reflector 20 along the height direction of the reflector 20 is 0.08 times the height of the reflector 20.

Specifically, H ₂ /H ₀ The ratio of (c) may be 0.08, 0.10, 0.12, 0.14, 0.15, etc., and embodiments of the present application are not limited.

In this embodiment, with continued reference to fig. 2 and 4, the larger the radius of the arc at the arc transition, the flatter the arc at the arc transition, and the flatter the airflow direction can be changed. However, the arc at the arc transition is too large, and it may be difficult to connect the reflecting cover 20 and the pan body 11 to each other. Air fryer 100 may satisfy the following relationship:

wherein R is the arc radius at the arc transition between the top cover 22 and the side cover 23, H ₀ For the height of the reflection housing 20, the height of the reflection housing 20 may be a distance from a surface of the top cover 22 near the pot 11 to a surface of the oil filter screen 50 near the top cover 22. The height setting of the circular arc radius comprehensive reflecting cover 20 at the circular arc transition position ensures that the circular arc radius at the circular arc transition position is enough to ensure that the passing airflow changes the flowing direction gently, and can avoid influencing the shape of the reflecting cover 20 or the connection condition of the reflecting cover 20 and the pot body 11. Protecting the smooth operation of the air fryer 100 and improving the energy utilization of the air fryer 100.

Illustratively, the radius of the arc at the arc transition between the top cover 22 and the side cover 23 is 22mm, and the radius of the arc at the arc transition between the top cover 22 and the side cover 23 is 0.22 times the height of the reflecting cover 20.

Specifically, R/H ₀ The ratio of (c) may be 0.22, 0.24, 0.26, 0.28, 0.30, 0.36, etc., and embodiments of the present application are not limited.

Second embodiment:

this embodiment provides an air fryer that differs from the air fryer shown in the first embodiment in that:

with continued reference to fig. 2, 4 and 5, the height of the reflector 20 is 100mm, the distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflector 20 is 32mm, and the distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflector 20 is 0.32 times the height of the reflector 20. The width of the reflector 20 is 200mm, the diameter of the fan blades 32 is 142mm, and the diameter of the fan blades 32 is 0.71 times the width of the reflector 20. The distance between the fan blade 32 and the reflecting cover 20 in the height direction of the reflecting cover 20 is 15mm, and the distance between the fan blade 32 and the reflecting cover 20 in the height direction of the reflecting cover 20 is 0.15 times the height of the reflecting cover 20. The radius of the arc at the arc transition between the top cover 22 and the side cover 23 is 36mm, and the radius of the arc at the arc transition between the top cover 22 and the side cover 23 is 0.36 times the height of the reflecting cover 20.

Third embodiment:

with continued reference to fig. 2, 4 and 5, the height of the reflector 20 is 100mm, the distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflector 20 is 29mm, and the distance between the fan blade 32 and the heat generating device 40 along the height direction of the reflector 20 is 0.29 times the height of the reflector 20. The width of the reflector 20 is 200mm, the diameter of the fan blades 32 is 116mm, and the diameter of the fan blades 32 is 0.58 times the width of the reflector 20. The distance between the fan blade 32 and the reflecting cover 20 in the height direction of the reflecting cover 20 was 12.5mm, and the distance between the fan blade 32 and the reflecting cover 20 in the height direction of the reflecting cover 20 was 0.125 times the height of the reflecting cover 20. The radius of the arc at the arc transition between the top cover 22 and the side cover 23 is 28mm, and the radius of the arc at the arc transition between the top cover 22 and the side cover 23 is 0.28 times the height of the reflecting cover 20.

According to the size matching relation among the reflecting cover 20, the fan 30 and the heating device 40 in the application, the impact and the backflow of the air flow between the fan blades 32 and the reflecting cover 20 can be guaranteed to be minimum on the premise of meeting the safety standard, so that the air flow in the air fryer 100 is maximum, and the energy use efficiency and the heating effect of the air fryer 100 are guaranteed.

The application proposes an air fryer 100, wherein an air flow between a shell 10 and a reflecting cover 20 is driven by a fan 30, and the heating device 40 is electrified to generate heat due to the relative arrangement of the fan 30 and the heating device 40. The air flow driven by the fan 30 passes through the heating device 40, and exchanges heat with the heating device 40 to generate a hot air flow, and the hot air flow flows to the food in the pot 11 of the shell 10 through the fan 30 and the reflecting cover 20, so that the food can achieve the cooking effect of the fryer. According to the parameter matching relationship among the fan blade 32, the heating device 40 and the reflecting cover 20, the potential safety hazard existing between the fan blade 32 and the heating device 40 can be eliminated, the heat exchange efficiency of the air flow and the heating device 40 can be ensured, the air flow is prevented from generating thermal shock and the like, and the use experience of the air fryer 100 is improved.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and are intended to be included within the scope of the present application.

Claims

1. An air fryer comprising:

the detachable pot body is arranged in the shell and comprises a heating cavity, and the heating cavity is provided with an inlet;

the reflecting cover is arranged on the shell and opposite to the pot body, the reflecting cover covers the inlet, and the reflecting cover is provided with a through hole;

the fan comprises a driving device and fan blades, the driving device is arranged on one side, far away from the pot body, of the reflecting cover, an output shaft of the driving device penetrates through the through hole, and the fan blades are arranged on the output shaft and are positioned between the reflecting cover and the pot body; and

the heating device is arranged between the fan blade and the pot body;

wherein, the air fryer also satisfies the following relationship:

the H is ₀ H is the height of the reflecting cover ₁ The distance between the fan blade and the heating device along the height direction of the reflecting cover.

2. The air fryer of claim 1, wherein said air fryer further satisfies the relationship:

wherein the D is ₀ For the width of the reflecting cover, D ₁ Is the diameter of the fan blade.

3. The air fryer of claim 1, wherein said air fryer further satisfies the relationship:

4. The air fryer of claim 1, wherein said air fryer satisfies the relationship:

wherein the H is ₀ H is the height of the reflecting cover ₂ The distance between the fan blade and the reflecting cover along the height direction of the reflecting cover.

5. The air fryer of claim 1, wherein said air fryer satisfies the relationship:

6. The air fryer of claim 1, wherein said reflector further comprises a top cover and a side cover, said side cover surrounding an outer edge of said top cover, said side cover being removably connected to said inlet of said pot at an end remote from said top cover, said top cover and said side cover being arcuately transitioned at a junction thereof.

7. The air fryer of claim 6, wherein said air fryer satisfies the following relationship:

8. The air fryer of claim 6, wherein said air fryer satisfies the following relationship:

9. The air fryer of claim 1, further comprising an oil screen disposed at an interface of said pot body and said reflector and on a side of said heat generating device remote from said drive means.

10. The air fryer of claim 1, wherein said heat generating device is disposed in an air path defined by said fan driven air flow.