CN223095359U

CN223095359U - Air fryer with good heating effect

Info

Publication number: CN223095359U
Application number: CN202421982426.7U
Authority: CN
Inventors: 王旭宁; 门书标; 石岩
Original assignee: Hangzhou Joyoung Household Electrical Appliances Co Ltd
Current assignee: Hangzhou Joyoung Household Electrical Appliances Co Ltd
Priority date: 2024-08-15
Filing date: 2024-08-15
Publication date: 2025-07-15
Anticipated expiration: 2034-08-15

Abstract

The present application discloses an air fryer with good heating effect, comprising a casing provided with an assembly cavity and a fryer assembly, an opening connected to the assembly cavity is provided on one side of the casing, the fryer assembly enters and exits the assembly cavity through the opening, a heat dissipation hole is provided at the bottom of the casing, a heating assembly is provided at the bottom of the assembly cavity, the heating assembly comprises a metal bottom plate provided at the bottom of the assembly cavity and a PTC heating element provided on the side of the metal bottom plate facing the bottom of the casing, an installation cavity is formed between the metal bottom plate and the bottom of the casing, and a heat insulation cover covering the outside of the PTC heating element is provided in the installation cavity. The present application can take into account both the heating effect of the PTC heating element and the air intake heat dissipation at the bottom of the casing by providing a heat insulation cover on the outside of the PTC heating element.

Description

Air fryer with good heating effect

Technical Field

The utility model relates to the field of air fryers, in particular to an air fryer with a good heating effect.

Background

In order to improve the uniformity of heating the upper surface and the lower surface of the food material, some air fryers are also provided with heating devices at the bottom of the assembly cavity, so that the food material is heated by the upper heat source and the lower heat source simultaneously when the air fryers work, and the food material can be colored more uniformly and has better taste. The existing bottom heating structure adopts a heating disc structure, a heating body is contained in a heating disc in die casting, the appearance integrity is good, the bottom of an assembly cavity is easy to clean, but die casting cost is high, the existing bottom heating structure adopts a stainless steel heating tube, the heating tube is directly exposed on the bottom surface of the cavity (such as the scheme of patent CN 221153837U), a user can see the heating tube when drawing out the frying pan, the appearance is attractive, the user is easy to scald, and dirt at the bottom of the cavity is difficult to clean.

In common household appliances, the PTC is also a common heating structure, and in related products, the PTC is generally directly exposed in an electric appliance cavity, and the PTC can have a better heating effect for the scene that heat dissipation is not needed in the electric appliance cavity.

However, when the PTC is applied to the air fryer, based on the design of the air fryer, the bottom of the casing is generally provided with a heat dissipation hole, external air can flow into the space between the casing and the pot body through the heat dissipation hole to reduce the temperature rise of the casing, if a PTC heating structure is arranged at the bottom of the assembly cavity, when the PTC is exposed, the heat dissipation efficiency of the PTC is lower, a part of heat loss of the PTC can be caused by the bottom airflow entering from the heat dissipation hole, the heating effect of the PTC on food is not facilitated, and if the airflow carries a part of heat to flow upwards to the machine head, the isothermal rise of devices in the machine head such as a motor is also increased, and the heat dissipation of electronic devices is not facilitated.

Disclosure of utility model

The utility model aims to provide an air fryer with good heating effect, which is used for solving the problems of more heat dissipation and low heating efficiency when a PTC heating structure is exposed at the bottom of an assembly cavity of the air fryer under the condition that a radiating hole is arranged at the bottom of a shell of the existing air fryer.

The utility model discloses an air fryer with good heating effect, which comprises a casing provided with an assembly cavity and a fryer assembly, wherein one side of the casing is provided with an opening communicated with the assembly cavity, the fryer assembly passes in and out of the assembly cavity through the opening, the bottom of the casing is provided with a heat dissipation hole, the bottom of the assembly cavity is provided with a heating assembly, the heating assembly comprises a metal bottom plate arranged at the bottom of the assembly cavity and a PTC heating element arranged at one side of the metal bottom plate, which faces the bottom of the casing, an installation cavity is formed between the metal bottom plate and the bottom of the casing, and a heat shield covered outside the PTC heating element is arranged in the installation cavity.

The air fryer with good heating effect has the following additional technical characteristics:

the inner wall of the heat shield is in clearance fit with the PTC heating element so that a first air isolation layer is formed between the heat shield and the PTC heating element.

A second air isolation layer is arranged between the heat shield and the bottom of the shell.

The heat shield is hung on the lower surface of the metal bottom plate, so that a second air isolation layer is formed between the heat shield and the bottom of the shell, or a convex rib protruding upwards is arranged on the bottom wall of the shell, and the heat shield is supported and fixed on the convex rib, so that a second air isolation layer is formed between the heat shield and the bottom wall of the shell.

The side wall of the heat shield is convexly provided with at least three column holes, the bottom of the shell is provided with at least three studs, the column holes are sleeved on the outer sides of the studs, and at least one column hole and the studs are fixed through fasteners.

The PTC heating element comprises a heating body and a wire harness connected with the heating body, and a wire passing hole for the wire harness to pass through is formed in the side wall of the heat shield.

The heating temperature of the PTC heating element is not more than 150 ℃.

The PTC heating element is fixed on the metal bottom plate through screw connection or riveting, or the heat shield is fixed on the bottom of the shell and is provided with a shield side wall extending upwards, the PTC heating element comprises a heating body and a mounting part extending outwards from the edge of the heating body in a radial direction, the mounting part is arranged on the shield side wall in a building mode, and the shield side wall and the metal bottom plate clamp the mounting part together.

The metal bottom plate is provided with a raised reinforcing rib towards the upper surface of the assembly cavity, the metal bottom plate is provided with a mounting hole for fixing the PTC heating element, and the mounting hole is formed in the reinforcing rib.

The metal bottom plate is characterized in that the part positioned at the inner side of the opening comprises a plane area positioned at the middle part and a step area surrounding the outer side of the plane area, the plane area is arranged in a concave manner relative to the step area, and the PTC heating element is arranged in the plane area.

By adopting the technical scheme, the utility model has the following beneficial effects:

1. According to the air fryer with good heating effect, the heat shield is arranged on the outer side of the PTC heating element in a covering mode, so that loss of heat of the PTC heating element when air is introduced into the bottom of the shell can be prevented, the heating effect of the PTC heating element on food can be ensured, meanwhile, the heat shield can prevent heat radiation of the PTC heating element from being transferred to the shell to cause serious melting of bottom temperature rise of the shell, and the service life of the shell is prolonged.

The PTC heating element is hidden in the mounting cavity, so that the influence of the appearance caused by exposure can be avoided, the upper surface of the metal bottom plate is easy to clean when the fryer assembly is pulled away, the operation of a user is convenient, and when the air fryer works, food materials are heated simultaneously through the heating pipe above the fryer assembly and the PTC heating element below the fryer assembly, the heating uniformity of the food materials is improved, and the food materials can be colored more uniformly and have better taste.

2. As a preferred embodiment, the inner wall of the heat shield is in clearance fit with the PTC heating elements such that a first air barrier is formed between the heat shield and the PTC heating elements. Through setting up first air isolation layer, strengthened PTC heating element's heat and the isolation of casing bottom, reducible heat is to the transmission of casing bottom, is favorable to reducing the temperature of casing bottom.

As a further preferred example of this embodiment, a second air isolation layer is provided between the heat shield and the bottom of the housing. Therefore, the heat shield is not contacted with the bottom of the shell, heat of the PTC heating element can be prevented from being indirectly transferred to the bottom of the shell through the heat shield, and the temperature of the bottom of the shell is reduced.

Further, the heat shield is hoisted on the lower surface of the metal bottom plate, so that a second air isolation layer is formed between the heat shield and the bottom of the shell. When the heat shield is hoisted, the heat shield is not contacted with the bottom of the shell, and the heat shield has better heat insulation effect.

Or the bottom wall of the shell is provided with a convex rib protruding upwards, and the heat shield is supported and fixed on the convex rib, so that a second air isolation layer is formed between the heat shield and the bottom wall of the shell. The heat shield is raised through the convex ribs, so that the heat shield is higher than the bottom wall of the shell, and heat on the heat shield cannot be transferred to the bottom wall of the shell through the convex ribs due to the fact that the contact area between the convex ribs and the heat shield is small, so that the heat insulation effect is guaranteed.

3. As a preferred implementation mode, the side wall of the heat shield is convexly provided with at least three column holes, the bottom of the shell is provided with at least three studs, the column holes are sleeved on the outer sides of the studs, and at least one column hole and the studs are fixed through fasteners. It can be understood that radial limit of the heat shield can be realized through the plug-in cooperation of at least three column holes and at least three studs, on this basis, the axial limit of the heat shield can be realized by using at least one fastener, and on the premise of ensuring the fixing effect, the use of accessories can be reduced, and the structural configuration is simplified.

4. As a preferred embodiment, the PTC heating element comprises a heating element and a wire harness connected to the heating element, and the side wall of the heat shield is provided with a wire passing hole through which the wire harness passes. Through setting up the wire hole, pencil accessible wire hole is connected with the outside control device of heat exchanger to ensure PTC heating element's circular telegram use.

5. As a preferred embodiment, the PTC heating element has a heating temperature of no more than 150 ℃. By adopting the upper limit temperature, the heating effect of the PTC heating element on food can be considered, and meanwhile, the influence of high temperature on the bottom of the shell can be avoided, so that the service life of the shell is prolonged.

6. As a preferred embodiment, the PTC heating element is fixed to the metal base plate by screwing or riveting. The structure is simple and the fixation is firm by adopting the conventional screwing or riveting mode.

Or the heat shield is fixed at the bottom of the shell, the heat shield is provided with a shield side wall extending upwards, the PTC heating element comprises a heating body and a mounting part extending outwards from the edge of the heating body in a radial direction, the mounting part is arranged on the shield side wall in a building mode, and the shield side wall and the metal bottom plate clamp the mounting part together. The PTC heating element is clamped on the premise of ensuring the fixing effect, so that the installation process can be simplified, and the separate fixing of the PTC heating element can be omitted.

7. As a preferred embodiment, the metal bottom plate is provided with raised reinforcing ribs facing the upper surface of the assembly cavity, the metal bottom plate is provided with mounting holes for fixing the PTC heating elements, and the mounting holes are formed in the reinforcing ribs. Through setting up the mounting hole on the strengthening rib, on the one hand can guarantee the intensity of fixed site, on the other hand can promote the aesthetic property.

8. As a preferred embodiment, the portion of the metal base plate located inside the opening includes a planar region located in the middle and a stepped region surrounding the outer side of the planar region, the planar region being disposed concave with respect to the stepped region, and the PTC heating element being disposed in the planar region. The PTC heating element is arranged in the middle area of the planar area, which can correspond to the frying pan assembly, is favorable for fully heating food to improve the heat utilization rate, and the metal bottom plate adopts a shape with high outside and low inside, so that the metal bottom plate is prevented from being influenced by high temperature to generate local deformation when adopting an integral planar structure, the probability of the metal bottom plate being heated and deformed can be reduced, and the use reliability of the metal bottom plate is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a schematic view of the housing and the assembly chamber according to an embodiment of the present application.

FIG. 2 is an exploded view of the composition of an air fryer in accordance with one embodiment of the application.

FIG. 3 is a schematic view of a heat shield according to an embodiment of the present application secured to a base.

Fig. 4 is a schematic cross-sectional view of the interior of a housing in accordance with one embodiment of the present application.

Fig. 5 is a schematic structural view of a PTC heating element according to an embodiment of the present application.

Fig. 6 is a schematic view of a PTC heating element according to an embodiment of the present application fixed to a metal base plate.

Reference numerals:

10. An assembly chamber; 11, a shell, 12, a fryer assembly, 13, a reflecting cover, 14, a hot air fan, 15, a heating tube, 16, a metal bottom plate, 17, a PTC heating element, 18, a mounting cavity, 19, a heat shield, 20, a column hole, 171, a heating body, 172, a wire harness, 191, a wire passing hole, 161, a mounting hole, 173, a through hole, 174, a fastener, 162, a reinforcing rib, 163, a plane area, 164, a step area, 111, a shell main body, 112 and a base.

Detailed Description

In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.

In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but that the present utility model may be practiced otherwise than as described herein, and therefore the scope of the present utility model is not limited by the specific embodiments disclosed below.

In addition, in the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, directly connected, indirectly connected via an intermediate medium, or in communication with each other between two elements or in an interaction relationship between two elements. However, it is noted that direct connection indicates that two connected bodies are not connected through a transition structure, but are connected through a connection structure to form a whole. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 6, the application provides an air fryer with good heating effect, which comprises a shell 11 provided with an assembly cavity 10 and a fryer assembly 12, wherein one side of the shell 11 is provided with an opening communicated with the assembly cavity 10, the fryer assembly 12 enters and exits the assembly cavity 10 through the opening, a reflecting cover 13 is arranged above the assembly cavity 10, an electric appliance cavity is formed above the reflecting cover 13, a motor and a cooling fan are arranged in the electric appliance cavity, a hot air assembly formed by the hot fan 14 and a heating tube 15 is arranged at the top of the assembly cavity 10, a cooling hole is formed at the bottom of the shell 11, the bottom of the assembly cavity 10 is provided with a heating assembly, the heating assembly comprises a metal bottom plate 16 arranged at the bottom of the assembly cavity 10 and a PTC heating element 17 arranged at one side of the metal bottom plate 16 facing the bottom of the shell 11, a mounting cavity 18 is formed between the metal bottom plate 16 and the bottom of the shell 11, and a heat shield 19 is arranged in the mounting cavity 18 and covers the outer side of the PTC heating element 17.

According to the air fryer with good heating effect, the heat shield 19 is covered on the outer side of the PTC heating element 17, so that loss of heat of the PTC heating element 17 when air is introduced into the bottom of the shell 11 can be prevented, the heating effect of the PTC heating element 17 on food materials can be ensured, meanwhile, the heat shield 19 can prevent heat radiation of the PTC heating element 17 from being transmitted to the shell 11 to cause serious melting of the bottom temperature rise of the shell 11, and the service life of the shell 11 can be prolonged.

The PTC heating element 17 is hidden in the mounting cavity 18, so that the influence of the appearance caused by exposure can be avoided, the upper surface of the metal bottom plate 16 is easy to clean when the fryer assembly 12 is pulled away, the operation of a user is convenient, and when the air fryer works, food materials are heated simultaneously through the heating tube 15 above the fryer assembly 12 and the PTC heating element 17 below the fryer assembly, the heating uniformity of the food materials is improved, and the food materials can be colored more uniformly and have better taste.

On the premise that the bottom of the shell 11 is provided with a heat dissipation hole, external air can flow into the mounting cavity 18 through the heat dissipation hole to dissipate heat at the bottom of the shell 11, so that the phenomenon that the bottom temperature of the shell 11 is excessively high to melt can be avoided, and due to the protection of the heat shield 19, the air flow cannot take away heat of the PTC heating element 17, heat loss can be avoided, and therefore a heating effect is ensured. Further, for example, an interlayer is arranged between the side wall of the casing 11 and the assembly cavity 10, and external air can flow into the interlayer through the heat dissipation holes so as to cool the side wall of the casing 11, so that the whole casing 11 is kept in a proper temperature range, and the service life of the casing 11 is prolonged. It will be appreciated that the heat sink is not solely for air intake, and in some embodiments, the heat sink may be for air exhaust, in which case the heat dissipation would be the same if the PTC is exposed, so the heat shield 19 of the present application prevents the air flow from affecting the PTC heat and thus ensures its heating efficiency. In some embodiments, the housing 11 includes a housing main body 111 and a base 112 disposed at the bottom of the housing main body 111, as shown in fig. 2 to 4, the metal base 16 and the base 112 may enclose a mounting cavity 18, and the ptc heating element 17 and the heat shield 19 are disposed in the mounting cavity 18.

The PTC heating element 17 can realize its own temperature control and stable output power by utilizing the characteristic that the resistance of the PTC thermosensitive material increases with the increase of temperature, and has various functions of heating, temperature control, overload protection, temperature compensation, and the like. By utilizing the characteristic that PTC dry combustion can attenuate power and selecting proper model (dry combustion power and upper limit of surface temperature), automatic protection can be realized, and a temperature controller/a fuse body is not required to be additionally arranged for controlling/protecting the bottom heating module. Preferably, PTC with 25W dry heating power and 150 ℃ upper surface temperature is selected, so that the heating effect can be achieved, and the base 112 of the shell 11 is not melted. The specific structure and working principle of PTC can be referred to the prior art, and will not be described herein.

As a preferred embodiment, the inner wall of the heat shield 19 is in a clearance fit with the PTC heating element 17 such that a first air barrier is formed between the heat shield 19 and the PTC heating element 17.

As shown in fig. 4, the PTC heating element 17 is not in contact with the inner side wall and the inner bottom wall of the heat shield 19, and the first air isolation layer surrounding the PTC heating element 17 is provided to enhance the isolation between the heat of the PTC heating element 17 and the bottom of the casing 11, thereby reducing the heat transfer between the PTC heating element 17 and the heat shield 19, reducing the heat transfer between the heat shield 19 and the bottom of the casing 11, reducing the heat transfer to the bottom of the casing 11, and facilitating the reduction of the temperature of the bottom of the casing 11.

As a further preferred example of this embodiment, a second air barrier is provided between the heat shield 19 and the bottom of the housing 11. In this embodiment, the heat shield 19 is not in contact with the bottom of the housing 11, so that heat of the PTC heating element 17 is prevented from being indirectly transferred to the bottom of the housing 11 through the heat shield 19, which is advantageous for reducing the temperature of the bottom of the housing 11.

In the case where the second air separation layer is formed, the heat shield 19 may be mounted in any of the following ways.

In one embodiment, the heat shield 19 is suspended from the lower surface of the metal base plate 16 such that a second air barrier is formed between the heat shield 19 and the bottom of the enclosure 11. When the heat shield 19 is hung, the heat shield 19 is not contacted with the bottom of the shell 11 at all, and the heat insulation effect is better. Specifically, the heat shield 19 is provided with a burring part that can be attached to the lower surface of the metal base plate 16, and the burring part and the metal base plate 16 can be fixed by screwing.

In another embodiment, the bottom wall of the housing 11 is provided with an upwardly protruding rib, and the heat shield 19 is supported and fixed on the rib, so that a second air isolation layer is formed between the heat shield 19 and the bottom wall of the housing 11. The heat shield 19 is raised by the convex ribs, so that the heat shield 19 is higher than the bottom wall of the shell 11, and heat on the heat shield 19 cannot be transferred to the bottom wall of the shell 11 by the convex ribs due to the small contact area between the convex ribs and the heat shield 19, so that the heat insulation effect is ensured. Specifically, the height of the heat shield 19 on the ribs satisfies that the top end of the heat shield 19 abuts against the lower surface of the metal bottom plate 16, so as to avoid heat loss of the PTC heating element 17 caused by gaps between the heat shield 19 and the metal bottom plate 16.

As a preferred embodiment, the side wall of the heat shield 19 is convexly provided with at least three column holes 20, the bottom of the casing 11 is provided with at least three studs, the column holes 20 are sleeved on the outer sides of the studs, and at least one column hole 20 and the studs are fixed through fasteners.

It can be understood that radial limit of the heat shield 19 can be realized by plugging and matching at least three column holes 20 with at least three studs, on this basis, the axial limit of the heat shield 19 can be realized by using at least one fastener, and on the premise of ensuring the fixing effect, the use of accessories can be reduced, and the structural configuration is simplified.

In one embodiment, as shown in fig. 3, the heat shield 19 is square, for example, and four post holes 20 are provided near four azimuth angles of the heat shield 19, and can be axially restrained by at least one fastener penetrating the stud and post holes 20. Of course, the number of the post holes 20 can be at least three, radial limitation of the heat shield 19 can be realized through plug-in matching of the three post holes 20 and the three studs, rotation of the heat shield 19 along the circumferential direction can be limited, and the reliability of limitation can be ensured on the premise of simplifying the structure.

As a preferred embodiment, the PTC heating element 17 includes a heating body 171 and a wire harness 172 connected to the heating body 171, and the side wall of the heat shield 19 is provided with a wire passing hole 191 through which the wire harness 172 passes.

By providing the via holes 191, the wire harness 172 may be connected to a control device external to the heat shield 19 through the via holes 191 to ensure energized use of the PTC heating elements 17. As shown in fig. 2 and 5, the upper end of one of the side walls of the heat shield 19 is provided with a concave notch to form a via hole 191, but the shape of the via hole 191 is not limited thereto, and may be a small hole structure corresponding to the wire harness 172, which is not limited by the present application. The shape of the heat shield 19 is not limited to square, and may be adjusted according to the shape of the heating element 171.

As a preferred embodiment, the heating temperature of the PTC heating element 17 does not exceed 150 ℃. By adopting the upper limit temperature, the heating effect of the PTC heating element 17 on the food can be considered, and the influence of high temperature on the bottom of the shell 11 can be avoided, so that the service life of the shell 11 can be prolonged.

As a preferred embodiment, the PTC heating element 17 is fixed to the metal base plate 16 by screwing or riveting. The structure is simple and the fixation is firm by adopting the conventional screwing or riveting mode. For example, as shown in fig. 6, the metal base plate 16 is provided with mounting holes 161, the PTC heating elements 17 are provided with through holes 173 corresponding to the mounting holes 161, and the PTC heating elements 17 can be fixed by penetrating fasteners 174 (e.g., screws).

As another preferred embodiment, a heat shield 19 is fixed to the bottom of the cabinet 11, the heat shield 19 has a shield side wall extending upward, and the PTC heating element 17 includes a heating body 171 and a mounting portion extending radially outward from the edge of the heating body 171, the mounting portion being laid on the shield side wall and the metal base plate 16 sandwiching the mounting portion together. The PTC heating element 17 can be simply mounted by clamping on the premise of ensuring the fixing effect, and the separate fixing of the PTC heating element 17 can be omitted.

As a preferred embodiment, the metal base plate 16 is provided with a raised rib 162 toward the upper surface of the assembly chamber 10, the metal base plate 16 is provided with a mounting hole 161 for fixing the PTC heating element 17, and the mounting hole 161 is provided on the rib 162. As shown in fig. 1, by providing the mounting holes 161 on the reinforcing ribs 162, on the one hand, strength of the fixing site can be secured, and on the other hand, beauty can be improved. As shown in fig. 5 and 6, the PTC heating element 17 includes a heating body 171 and a mounting portion extending radially outward from the edge of the heating body 171, the mounting portion being provided with a through hole 173, and fastening members 174 penetrating the through hole 173 and the mounting hole 161 to fix the PTC heating element 17. Preferably, the ribs 162 may be patterned to enhance aesthetics.

As a preferred embodiment, the portion of the metal base plate 16 located inside the opening includes a flat region 163 located in the middle and a stepped region 164 surrounding the outside of the flat region 163, the flat region 163 being disposed concave with respect to the stepped region 164, and the PTC heating element 17 being disposed in the flat region 163.

As shown in fig. 1 and 6, the planar area 163 has a larger area than the stepped area 164, the PTC heating element 17 is disposed in the area of the planar area 163 corresponding to the middle area of the fryer assembly 12, and based on the habit of the user, the food is usually placed at a position covering the middle area of the pot body, so that the PTC heating element 17 disposed in the middle is beneficial to fully heating the food to improve the heat utilization rate, and the metal bottom plate 16 adopts a shape with high outside and low inside, so that the metal bottom plate 16 is prevented from being locally deformed due to high temperature when the whole planar structure is adopted, the probability of thermal deformation of the metal bottom plate 16 can be reduced, and the use reliability of the metal bottom plate is improved.

The technical solution protected by the present utility model is not limited to the above embodiments, and it should be noted that, the combination of the technical solution of any one embodiment with the technical solution of the other embodiment or embodiments is within the scope of the present utility model. While the utility model has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the utility model and are intended to be within the scope of the utility model as claimed.

Claims

1. The air fryer with good heating effect comprises a housing provided with an assembly cavity and a fryer assembly, wherein one side of the housing is provided with an opening communicated with the assembly cavity, the fryer assembly passes in and out the assembly cavity through the opening, the bottom of the housing is provided with a heat dissipation hole, the bottom of the assembly cavity is provided with a heating assembly, the air fryer is characterized in that,

The heating component comprises a metal bottom plate arranged at the bottom of the assembly cavity and a PTC heating element arranged at one side of the metal bottom plate, which faces the bottom of the shell, wherein an installation cavity is formed between the metal bottom plate and the bottom of the shell, and a heat shield covered on the outer side of the PTC heating element is arranged in the installation cavity.

2. A heated air fryer according to claim 1, wherein,

3. A heated air fryer according to claim 2, wherein,

4. An air fryer with improved heating effect according to claim 3, wherein,

The heat shield is hoisted on the lower surface of the metal bottom plate, so that a second air isolation layer is formed between the heat shield and the bottom of the shell;

or the bottom wall of the shell is provided with a convex rib protruding upwards, and the heat shield is supported and fixed on the convex rib, so that a second air isolation layer is formed between the heat shield and the bottom wall of the shell.

5. A heated air fryer according to claim 1, wherein,

6. A heated air fryer according to claim 1, wherein,

7. A heated air fryer according to claim 1, wherein,

The heating temperature of the PTC heating element is not more than 150 ℃.

8. A heated air fryer according to claim 1, wherein,

The PTC heating element is fixed on the metal bottom plate through screw connection or riveting;

Or the heat shield is fixed at the bottom of the shell, the heat shield is provided with a shield side wall extending upwards, the PTC heating element comprises a heating body and a mounting part extending outwards from the edge of the heating body in a radial direction, the mounting part is arranged on the shield side wall in a building mode, and the shield side wall and the metal bottom plate clamp the mounting part together.

9. A heated air fryer according to claim 1, wherein,

10. A heated air fryer according to claim 1, wherein,