An enhanced glass air fryer with cooling air ducts

Abstract

The application discloses an enhanced glass air fryer with a cooling air duct. The upper part of the shell is an electrical accommodation cavity, and the lower part is a heating cavity. A cold air fan is arranged in the electrical accommodation cavity. A first air duct surrounds the cold air fan and is arranged around the air outlet end of the heating cavity. After the frying barrel is placed, cold air flows along the outer wall of the barrel, reduces the temperature rise, and isolates high temperature. A handle cover is sleeved on the handle. The air inlet end of a second air duct in the handle cover is connected to the air outlet end of the first air duct. The air outlet end of the second air duct extends to the lower end of the handle cover and faces the outer side of the frying barrel, so that cold air is introduced to flow through the handle to dissipate heat. A first air guide plate is arranged at the lower end of the handle cover, and cold air is guided to continue to blow downwards to the uncovered area of the frying barrel, so that the cold air is used twice, the cooling blind area is eliminated, and the anti-scald performance is improved.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and in particular relates to an enhanced glass air fryer with a cooling air duct. Background Technology

[0002] Air fryers use high-speed circulating hot air to heat food. During cooking, the frying drum is directly exposed to radiation from the heating element and the impact of hot air, causing a large amount of heat to accumulate on the outer wall and metal handle, with surface temperatures far exceeding the safe range for human contact. After cooking, if the user accidentally touches the outer wall of the frying drum or holds the handle when removing it, a burn is very likely to occur. To alleviate this problem, existing air fryers typically employ the following measures: First, adding heat insulation material or a heat shield to the outside of the heating chamber to attempt to block heat transfer. However, such insulation layers can only passively slow down heat conduction and cannot fundamentally reduce the high temperature reached by the outer wall of the frying drum itself during heating. Furthermore, when the frying drum is made of transparent materials such as glass to facilitate user observation of the food's cooking process, the heat shield obstructs the view, making it unsuitable. Second, using anti-scalding silicone sleeves or plastic parts on the handle. However, these anti-scalding sleeves rely solely on the low thermal conductivity of the material to delay the heat sensation; after prolonged use, they still heat up due to heat accumulation and do not solve the problem of the frying drum's outer wall becoming too hot to handle. Another solution involves creating ventilation holes in the handle to utilize natural convection for heat dissipation, but the airflow lacks active drive, resulting in slow flow and extremely limited heat dissipation. Overall, existing technologies have not completely solved the above problems. The outer wall of the frying drum and the handle remain at a high temperature after cooking, making it difficult to fundamentally reduce the risk of burns when users remove the drum. Summary of the Invention

[0003] (a) Purpose of the invention To overcome the above shortcomings, the present invention aims to provide an enhanced glass air fryer with a cooling air duct, in order to solve the technical problem that existing air fryers lack an airflow guiding scheme to actively direct the cooling airflow to the outer wall of the frying drum and the handle, and that the glass material limits the applicability of the heat insulation cover, resulting in the persistent risk of high-temperature burns in this area.

[0004] (II) Technical Solution To achieve the above objectives, the technical solution provided in this application is as follows: An enhanced glass air fryer with a cooling air duct includes: a housing, the upper part of which is an electrical receiving cavity and the lower part is a heating cavity; a cooling fan rotatably disposed in the electrical receiving cavity; a heating assembly disposed at the top of the heating cavity; a first air duct disposed in the electrical receiving cavity, the air inlet of which surrounds the cooling fan and connects to the electrical receiving cavity, and the air outlet of which connects to the heating cavity and surrounds the heating cavity; a frying drum that can be pushed and pulled into and out of the heating cavity, wherein when the frying drum is placed in the heating cavity, the cooling fan drives cold air to blow out from the air outlet through the first air duct, so that the cold air surrounds the outer side of the frying drum and flows along its height direction; a handle connected to both sides of the frying drum; a handle cover fitted onto the handle, the upper end of which has a clamping groove for the handle to be put into, and the lower end extending along the height direction of the outer wall of the frying drum. Extending away from the handle, the inner wall of the handle cover extends along its shape to form a second air duct. The side of the second air duct facing the handle has a side opening. The air inlet of the second air duct passes through the upper surface of the handle cover and connects with the air outlet of the first air duct. The air outlet extends to the lower end of the handle cover and faces the outer side of the frying bucket. It is used to guide the cold air output from the air outlet of the first air duct into the interior of the handle cover and flow through the handle to remove the heat radiated from the frying bucket to the handle. It also includes a first air guide plate, which is located at the lower end of the handle cover and connected to the handle cover, and corresponds to the side opening of the second air duct. It is used to guide the cold air flowing through the handle to continue to flow downward, be discharged through the air outlet of the second air duct, and blow it towards the area of ​​the frying bucket not covered by the handle cover.

[0005] This application utilizes a cooling fan to draw external cold air into the electrical housing cavity and guides it to the heating cavity via a first air duct, circulating around the outer side of the frying drum. As the cold air flows along the height of the outer wall of the frying drum, it continuously removes the heat accumulated on the outer wall due to thermal radiation and hot air impact, creating a forced convection cooling effect and effectively reducing the temperature rise of the outer wall of the frying drum. During its flow, the cold air isolates the path of heat transfer from the high temperature of the heating cavity to the outside. Even if the frying drum is made of transparent glass for easy observation of the cooking process and a heat shield cannot be installed, effective temperature control can still be achieved through active airflow. Unlike existing technologies where the cold air only circulates within the frying head, this solution actively delivers cold air to the periphery of the frying drum, allowing the cold air to directly act on the high-temperature outer wall of the frying drum, thus improving heat dissipation efficiency and fundamentally reducing the risk of burns when the user touches it. Because the air inlet of the second air duct is located on the upper surface of the handle cover and connects with the air outlet of the first air duct, cold air exits from the first air duct and directly enters the second air duct. The air outlet extends to the bottom of the handle cover, allowing the cold air to flow completely through the internal area of ​​the handle cover before exiting. In this way, the cold air continuously carries away the heat conducted from the metal parts of the handle as it flows through the handle cover, keeping the outer surface temperature of the handle cover consistently low, preventing users from being burned when holding the handle after cooking. Furthermore, a first air guide plate is located at the lower end of the handle cover. This guide plate further directs the cold air flowing through the handle downwards, allowing it to exit through the second air duct and be directed towards the area of ​​the fryer's outer wall not covered by the handle cover. Thus, the cold air, after cooling the handle, is reused, continuously carrying away heat from the outer wall of the fryer, especially the area below the handle, eliminating localized cooling blind spots and further reducing the overall temperature rise of the fryer's outer wall, thus enhancing the overall anti-scalding safety performance of the appliance.

[0006] In some embodiments, the first air duct includes: an inner cover of the air duct surrounding the cooling fan and a second air guide plate, wherein the inner cover of the air duct and the second air guide plate are disposed opposite to each other and combined to form the first air duct.

[0007] The inner cover of the air duct and the air guide plate are positioned opposite each other, forming a closed or semi-closed guiding channel around the cooling fan. This ensures that the cold air flows in a predetermined direction and does not diffuse into the electrical housing cavity. Furthermore, their arrangement around the cooling fan provides ample space for its installation and rotation, preventing structural interference. In this way, the airflow from the cooling fan can be collected and guided into the first air duct to the maximum extent, reducing ineffective airflow circulation within the cavity, improving the overall airflow utilization efficiency, and thus enhancing the cooling effect on the outer wall of the frying drum.

[0008] In some embodiments, the second air guide plate is provided with a plurality of first air guide ribs spaced apart along its circumferential direction. Each first air guide rib abuts against the inner cover of the air duct and divides the first air duct into a plurality of independent first branch air ducts extending from the air inlet to the air outlet.

[0009] By arranging multiple first air guide ribs at intervals along the curvature of the air guide plate, and ensuring that each air guide rib abuts against the inner cover of the air duct, multiple independent first air distribution channels are formed between the air inlet and air outlet. This allows the cold air to be evenly distributed into multiple independent flow channels after entering the first air duct. Since the first air guide ribs extend from the air inlet to the air outlet and are spaced apart from each other, the airflow in each air distribution channel does not interfere with each other, avoiding turbulence and energy loss caused by mixing of airflows in the curved path. This allows the cold air to be stably and evenly distributed to all circumferential areas of the outer wall of the frying drum, ensuring a consistent cooling effect on the outer wall of the frying drum in the circumferential direction and preventing localized high temperatures.

[0010] In some embodiments, the housing includes a lower shell and an upper shell disposed above and connected thereto. The lower edge of the upper shell extends downward and covers the outer side of the top side of the lower shell. An electrical receiving cavity is formed between the top surface of the lower shell and the upper shell. A heating cavity is formed in the lower shell. The top side of the lower shell is provided with multiple second air guide ribs spaced apart below the first air distribution channel. The second air guide ribs abut against the inner side of the upper shell to form multiple exhaust ports with open ends and their axes arranged along the extension direction of the outer wall of the frying barrel. Each exhaust port is connected to the corresponding first air distribution channel.

[0011] Since the casing consists of a lower shell and an upper shell, the side of the lower shell has multiple second air guide ribs below the first air distribution duct. These second air guide ribs abut against the inner side of the upper shell to form multiple exhaust vents. Each exhaust vent is connected to a corresponding first air distribution duct, and the cold air enters the corresponding exhaust vent after leaving the first air distribution duct. Because the exhaust vents are open at both ends and their axes are arranged along the extension direction of the outer wall of the frying drum, the cold air can flow along the height direction of the outer wall of the frying drum when it is blown out of the exhaust vents. Furthermore, the multiple second air guide ribs further subdivide the airflow, so that the cold air flows downward close to the outer wall of the frying drum with a uniform flow speed and direction, achieving large-area coverage cooling and effectively improving the overall cooling effect of the outer wall of the frying drum.

[0012] In some embodiments, the lower housing includes: a base, an electrical mounting cover, and two reinforcing brackets. The base is L-shaped and has a bottom wall and a support wall that rises from one side of the bottom wall. The electrical mounting cover is disposed above the base and forms a heating cavity with the base. Parts of its rear side and left and right sides are connected to the support wall. The two reinforcing brackets are disposed on the left and right sides inside the base. The upper end of each reinforcing bracket extends along the corresponding side edge of the electrical mounting cover and is connected. The middle and lower ends are respectively connected to the inner side surface and the inner bottom surface of the base.

[0013] Two reinforcing brackets are symmetrically arranged on the left and right sides inside the base, thus constructing a multi-point, multi-directional three-dimensional constraint framework between the electrical mounting cover and the base. Under the action of high-temperature thermal expansion of the heating chamber and alternating loads generated by repeated pushing and pulling of the frying drum by the user, this structure can effectively limit the electrical mounting cover from sinking, tilting, or lateral displacement deformation, ensuring that the mating gaps between the air outlet and exhaust port of the first air duct, and between the exhaust port and the air inlet of the handle sleeve, are always kept within the design allowable range. This avoids leakage, deflection, or flow rate attenuation of the cooling airflow at the air duct interface due to component misalignment or loosening, ensuring that the cold air tightly surrounds the outer wall of the frying drum along the predetermined path and is smoothly introduced into the second air duct, so that the active cooling effect of the whole machine remains stable and reliable during long-term use.

[0014] In some embodiments, the edge of the electrical mounting cover has a mounting groove for the upper end of the reinforcing bracket to be inserted.

[0015] Based on this, the mounting grooves on the edge of the electrical mounting cover provide precise embedding and positioning points for the upper end of the reinforcement bracket. On the one hand, this facilitates quick alignment and prevents mistake-making during assembly, simplifying the installation process and improving assembly efficiency and consistency. On the other hand, after the upper end of the bracket is embedded in the groove, it is constrained by the groove wall in both the horizontal and vertical directions, further limiting the lateral movement and longitudinal disengagement of the upper end of the bracket. This enhances the connection rigidity between the bracket and the electrical mounting cover, improving the vibration and impact resistance of the entire support frame. As a result, even under long-term high-temperature cycling and mechanical vibration environments, the relative positional accuracy of each component in the air duct can still be maintained, effectively extending the durability of the cooling air duct's sealing effect and heat dissipation performance.

[0016] In some embodiments, the air inlet end of the handle cover is a plurality of air inlets arranged side by side, and the inner side of the handle cover is provided with a plurality of third air guide ribs spaced apart. One end of each third air guide rib is connected to at least one air inlet, and the other end extends to the bottom of the handle cover with the end extending in a horizontal direction. A second air distribution channel is formed between adjacent third air guide ribs, and a plurality of second air distribution channels constitute a second air channel. The first air guide plate covers a plurality of second air distribution channels at the same time, and its lower end abuts against the upper surface of the end of the third air guide rib, and its two sides are connected to the handle cover.

[0017] Because the handle cover has multiple air inlets arranged side by side, when cold air is drawn into the second air duct through these inlets, the multiple inlets can initially organize and homogenize the airflow, preventing it from becoming too concentrated and forming a high-speed jet, thus making the airflow entering the second air duct more stable. By setting multiple third air guide ribs at intervals on the inner side of the handle cover, with one end of each third air guide rib connected to at least one air inlet and the other end extending to the bottom of the handle cover, the second air distribution duct formed between adjacent third air guide ribs further divides the airflow into multiple independent cooling airflows. Each airflow corresponds to a different area of ​​the handle cover, ensuring that all parts of the handle cover receive sufficient cooling in the width direction, and avoiding localized high temperatures in the handle due to uneven airflow distribution. Meanwhile, the lower end of the third air guide rib extends horizontally, directing the air outlets of each second air duct towards the outer side of the frying drum. The lower end of the first air guide plate abuts against the ends of multiple third air guide ribs and connects to the handle cover on both sides. This allows the cooling airflow from each second air duct to be uniformly received and concentrated, directed to the area of ​​the frying drum not covered by the handle cover, providing forced convection cooling to this exposed area. Since this area is directly exposed to the high-temperature environment of the heating chamber and lacks the heat insulation protection of the handle cover, the temperature is high after cooking, and the risk of burns from accidental contact by the user is more prominent. Through the concentrated guiding effect of the first air guide plate, the cold air originally used only for cooling the handle can be reused, precisely covering this high-risk area and further improving the overall anti-scalding safety performance of the machine.

[0018] In some embodiments, the upper surface of the handle cover is provided with a wind deflector on the outside of the air inlet end. The wind deflector blocks the outwardly diffused air discharged from the air outlet end of the first air duct and concentrates it into the air inlet end of the second air duct.

[0019] Because the upper surface of the handle cover has wind-blocking ribs on the outside of the air inlet, when cold air is discharged from the air outlet of the first air duct, the wind-blocking ribs can effectively block the outward diffusion of the air discharged from the air outlet, preventing the cold air from escaping into the external environment before reaching the air inlet. Through the concentrated guiding effect of the wind-blocking ribs, all the cold air is forced into the air inlet of the second air duct, which greatly improves the efficiency of cold air transfer from the first air duct to the second air duct, avoids airflow waste, ensures sufficient cooling airflow for the handle cover, and thus stably maintains the low temperature of the handle cover and ensures safe use.

[0020] In some embodiments, it further includes: a sealing ring surrounding the edge of the electrical mounting cover facing the heating cavity, wherein the front and left and right edges of the sealing ring have a V-shaped cross-section and the rear edge has a straight cross-section.

[0021] By using a sealing ring positioned around the edge of the electrical mounting cover facing the heating chamber, the sealing ring forms circumferential contact with the edge of the glass frying bucket's opening after the frying bucket is placed into the heating chamber. This effectively blocks the leakage of high-temperature airflow from the heating chamber, preventing hot air from entering the electrical housing and affecting electrical components such as the cooling fan. It also prevents external cold air from being directly drawn in without passing through the cooling air duct, ensuring the independence of the machine's hot air circulation and cooling air path. The sealing ring has a V-shaped cross-section on its front and left / right edges. When the glass frying bucket is pushed or pulled into or out of the heating chamber, the two inclined sides of the V-shaped cross-section can form an elastic line contact with the edge of the glass pot's opening. The elastic deformation of the V-shaped opening tightly seals the opening, achieving an effective seal. Furthermore, the inclined guide significantly reduces sliding resistance during the pushing and pulling process, making the glass frying bucket move in and out more smoothly. This avoids the problems of traditional round or square sealing rings causing jamming or damage due to excessive interference fit. Meanwhile, the rear edge of the sealing ring adopts a straight-face structure, which eliminates the need for frequent pushing and pulling. The straight-face structure provides more stable support rigidity and a larger contact area, ensuring that the rear sealing pressure is uniform after the fryer is fully inserted and that gaps are not easily generated due to excessive elastic deformation. Thus, while ensuring smooth operation, the sealing reliability of the heating chamber during the cooking process is comprehensively improved.

[0022] In some embodiments, the top of the upper housing has an opening, and the housing further includes a top cover removably disposed over the opening.

[0023] By providing an opening at the top of the upper casing and a removable top cover over the opening, users can easily open the top cover to maintain components such as the cooling fan inside the electrical housing. This also facilitates installation during assembly, improving the maintainability and ease of assembly of the entire unit. Simultaneously, a gap exists between the top cover and the top of the upper casing, allowing external air to naturally enter the electrical housing through this gap. This continuously supplies fresh cooling air to the cooling fan, ensuring unobstructed airflow and preventing negative pressure or insufficient airflow due to a closed casing, further enhancing the unit's continuous heat dissipation capacity. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the enhanced glass air fryer with cooling air duct of the present invention; Figure 2 This is a diagram showing the state of the enhanced glass air fryer with cooling duct of the present invention when the frying bucket is pulled out; Figure 3 This is a schematic diagram of the structure of the enhanced glass air fryer with cooling duct of the present invention in the default frying bucket mode; Figure 4 This is a top view of the enhanced glass air fryer with cooling air ducts of the present invention; Figure 5 yes Figure 4 A cross-sectional view along the AA direction; Figure 6 yes Figure 5 A magnified view of part A in the middle; Figure 7 yes Figure 4 Cross-sectional view along the BB direction; Figure 8 This is a schematic diagram of the sealing ring in the enhanced glass air fryer with cooling air duct of the present invention; Figure 9 This is a cross-sectional view of the sealing ring of the present invention; Figure 10 This is an exploded view of the enhanced glass air fryer with cooling air ducts of the present invention; Figure 11 This is a schematic diagram of the structure of the frying drum in the enhanced glass air fryer with cooling air duct of the present invention; Figure 12 This is an assembly diagram of the handle sleeve and the first air guide plate in the enhanced glass air fryer with cooling air duct of the present invention. Figure 13 This is an exploded view of the handle cover of the enhanced glass air fryer with cooling duct of the present invention; Figure 14 This is an assembly diagram of the reinforced support bracket installed in the lower shell of the enhanced glass air fryer with cooling air duct of the present invention; Figure 15 This is a schematic diagram of the reinforced support structure in the enhanced glass air fryer with cooling air duct of the present invention.

[0025] Figure label: 1. Housing; 11. Electrical housing cavity; 12. Heating cavity; 13. Lower shell; 131. Base; 132. Electrical mounting cover; 1321. Second air guide rib; 133. Reinforcing bracket; 14. Upper shell; 1401. Top cover; 15. Exhaust vent; 2. Cooling fan; 3. Heating assembly; 4. Inner cover of air duct; 5. Second air guide plate; 51. First air guide rib; 6. Frying drum; 61. Handle; 7. Handle cover; 71. Handle cover fixing seat; 72. Handle cover top cover; 721. Wind baffle rib; 722. Air inlet; 723. Third air guide rib; 8. Hot fan; 9. First air duct; 10. Heating tube; 16. Second air duct; 17. First air guide plate; 18. Sealing ring; 1801. V-shaped structure; 1802. Straight surface structure. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0027] Referring to Figures 1-6, the present invention provides an enhanced glass air fryer with a cooling air duct, comprising: a housing 1 having an upper electrical receiving cavity 11 and a lower heating cavity 12. A cooling fan 2 is disposed within the electrical receiving cavity 11, rotatably mounted therein and driven by a motor to generate cooling airflow. A heating assembly 3 is disposed at the top of the heating cavity 12, typically including a heating tube 10 and a hot air fan 8, for generating high-temperature circulating hot air to fry food. A first air duct 9 is disposed around the cooling fan 2 within the electrical receiving cavity 11. The air inlet of the first air duct 9 communicates with the electrical receiving cavity 11 to introduce the cooling air generated by the cooling fan 2, while its outlet communicates with and surrounds the heating cavity 12. A frying bucket 6 can be pushed and pulled into and out of the heating cavity 12, allowing the user to insert or remove the frying bucket 6 via a pushing and pulling operation. Specifically, the cooling fan 2 and the heating fan 8 rotate coaxially, and are mounted on the same shaft and driven synchronously by the same motor. This eliminates the need for separate drive sources, simplifies the overall structure, reduces manufacturing costs, and ensures that the start-stop and speed of both fans are always consistent, facilitating overall machine control.

[0028] After the frying drum 6 is placed into the heating chamber 12, the cooling fan 2 drives external cold air to be blown out from the air outlet through the first air duct 9. This causes the cold air to circulate around the outer side of the frying drum 6 and flow along its height, continuously carrying away the heat accumulated on the outer wall of the frying drum 6 due to heat radiation and hot air impact, forming a forced convection cooling effect and effectively reducing the temperature rise of the outer wall of the frying drum 6. During the flow of the cold air, the heat transfer path from the high temperature of the heating chamber 12 to the outside is also isolated. Even if the frying drum 6 is made of transparent glass so that the user can observe the cooking process and cannot be fitted with a heat insulation cover, effective temperature control can still be achieved through active airflow. Unlike existing technologies where the cold air only circulates inside the head unit, this solution actively delivers cold air to the periphery of the frying drum 6, directly acting on the high-temperature outer wall, which not only improves heat dissipation efficiency but also fundamentally reduces the risk of burns when the user touches it.

[0029] Please refer to Figures 5, 6, and 11-13. The frying drum 6 has handles 61 attached to both sides. The handles 61 are typically made of metal and are fixedly attached to the side walls of the frying drum 6 for users to grip and push / pull. A handle cover 7 is fitted over the handles 61. The handle cover 7 can be made of heat-resistant plastic or silicone, or other materials with good heat insulation properties, to insulate the handles 61 from high temperatures. The upper end of the handle cover 7 has a clamping groove for the handle 61 to fit into. The upper end has an open groove-shaped structure, through which the handle 61 is inserted and fixed inside the handle cover 7. The lower end of the handle cover 7 extends longitudinally away from the handle 61 along the height direction of the outer wall of the frying drum 6, giving the handle cover 7 an overall longitudinally extending shape. The inner wall of the handle cover 7 extends along its shape to form a second air duct 16. The side of the second air duct 16 facing the handle 61 has a side opening. The air inlet of the second air duct 16 passes through the upper surface of the handle cover 7 and connects with the air outlet of the first air duct 9. The air outlet extends to the lower end of the handle cover 7 and faces the outer side of the fryer bucket 6. After being discharged from the first air duct 9, the cold air directly enters the second air duct 16 and flows completely through the internal area of ​​the handle cover 7. During the flow, it continuously carries away the heat conducted by the metal parts of the handle 61, keeping the outer surface temperature of the handle cover 7 at a low level. This prevents the user from being burned when holding the handle 61 after cooking (as shown in Figures 6 and 13, the black arrows indicate the direction of cold air flow). Specifically, the handle cover 7 is composed of a handle cover fixing seat 71 and a handle cover top cover 72.

[0030] Furthermore, a first air guide plate 17 is provided at the lower end of the handle cover 7. This first air guide plate 17 is connected to the handle cover 7 and corresponds to the side opening of the second air duct 16. It is used to guide the cold air flowing through the handle 61 to continue flowing downwards, and then discharged through the air outlet of the second air duct 16 and blown towards the area of ​​the frying drum 6 not covered by the handle cover 7. It should be noted that during the operation of the air fryer, the outer wall of the frying drum 6 is directly impacted by the heat radiation of the heating component 3 and the high-temperature airflow blown out by the hot air fan 8, and its surface temperature is much higher than that of the handle 61. The handle 61 is fixed to the outside of the frying drum 6 and mainly relies on heat conduction to receive heat from the frying drum 6. It is located outside the heating chamber 12, so the temperature rise of the handle 61 is much smaller than that of the outer wall of the frying drum 6. According to actual measurements, the temperature of the outer wall of the frying drum 6 can reach about 180℃~200℃ during cooking, while the surface temperature of the handle 61 usually does not exceed 80℃~100℃. When cold air enters the second air duct 16 from the first air duct 9 and flows through the handle 61, although it carries away heat from the handle 61, causing its own temperature to rise slightly, the temperature of the handle 61 is still significantly lower than the outer wall temperature of the frying drum 6 because the temperature of the handle 61 is much lower. Therefore, the cooling air guided and discharged by the first air guide plate 17 still has sufficient heat absorption capacity to continue to effectively force convection cooling the exposed areas of the frying drum 6 not covered by the handle cover 7, realizing the secondary utilization of the cooling air, and at the same time, the cooling effect on the outer wall of the frying drum 6 will not be affected by excessively high air temperature. This eliminates local cooling blind spots, further reducing the overall temperature rise of the outer wall of the frying drum 6 and enhancing the anti-scalding safety performance of the whole machine.

[0031] Furthermore, the air inlet end of the handle jacket 7 has multiple air inlets 722 arranged side by side. When cold air is drawn into the second air duct 16 through the air inlets 722, the multiple air inlets 722 can initially sort and homogenize the airflow, preventing the airflow from becoming too concentrated and forming a high-speed jet, thus making the airflow entering the second air duct 16 more stable. The inner side of the handle jacket 7 is provided with multiple third air guide ribs 723 at intervals. One end of each third air guide rib 723 is connected to at least one air inlet 722, and the other end extends to the bottom of the handle jacket 7 with the end extending horizontally. Adjacent third air guide ribs 723 form a second air distribution channel, and multiple second air distribution channels constitute the second air duct 16. The third air guide ribs 723 divide the internal space of the second air duct 16 into multiple independent cooling airflows, each airflow corresponding to a different area of ​​the handle jacket 7, ensuring that all parts of the handle jacket 7 in the width direction can be adequately cooled. The first air guide plate 17 simultaneously covers multiple second air ducts, with its lower end abutting against the upper surface of the ends of multiple third air guide ribs 723, and its sides connected to the handle sleeve 7 (which can be in the form of snaps). The lower ends of the third air guide ribs 723 extend horizontally, so that the air outlets of each second air duct face the outer side of the frying drum 6. The first air guide plate 17 uniformly receives and concentrates the cooling airflow discharged from each second air duct to the area of ​​the frying drum 6 not covered by the handle sleeve 7, and then continues to flow downward or outward along the outer wall of the frying drum 6 in this area, forcibly convecting and cooling the exposed area, accurately covering the high-risk area for burns.

[0032] Furthermore, the upper surface of the handle jacket 7 is provided with a wind deflector 721 on the outer side of the air inlet. The wind deflector 721 is a strip-shaped structure that protrudes upward from the upper surface of the handle jacket 7 and is located on the periphery of the air inlet of the second air duct 16. When cold air is discharged from the air outlet of the first air duct 9, the wind deflector 721 can effectively block the outward diffusion of the air discharged from the air outlet, preventing the cold air from being lost to the external environment before reaching the air inlet 722. Through the concentrated guiding effect of the wind deflector 721, all the cold air is forced into the air inlet of the second air duct 16, which greatly improves the efficiency of cold air transfer from the first air duct 9 to the second air duct 16, avoids airflow waste, ensures sufficient cooling air volume for the handle jacket 7, and thus stably maintains the low temperature of the handle jacket 7 and ensures safe use.

[0033] Please refer to Figures 5 and 10. The specific implementation of the first air duct 9 is as follows: The first air duct 9 includes a curved inner cover 4 and a second air guide plate 5. The inner cover 4 and the second air guide plate 5 are arranged opposite to each other and combined to form the first air duct 9. Both the inner cover 4 and the second air guide plate 5 are curved sheet structures. They can be snapped together during assembly to form a channel for the flow of cold air. They are connected to the housing 1 respectively to ensure that the position of the first air duct 9 in the whole machine is stable and reliable, and to avoid displacement or loosening due to vibration or external force. Both the inner cover 4 and the second air guide plate 5 have clearance notches in the middle to avoid the cooling fan 2. The shape of the clearance notches matches the shape of the cooling fan 2 to provide clearance space for the installation and rotation of the cooling fan 2 and to avoid structural interference. After the inner cover 4 of the air duct is set opposite to the second air guide plate 5, a closed or semi-closed guide channel is formed around the cooling fan 2, ensuring that the cold air flows in the predetermined direction and does not spread into the electrical housing cavity 11. The airflow blown out from the cooling fan 2 can be collected to the maximum extent and introduced into the first air duct 9, reducing the ineffective circulation of airflow in the cavity and improving the utilization efficiency of the overall air volume.

[0034] Considering that users usually only come into contact with the front side of the frying drum 6 (i.e. the side facing the user) during use, while the rear side of the frying drum 6 (near the inner wall of the casing 1) is not easily touched by the user, the inner cover of the air duct 4 and the second air guide plate 5 are set as curved arc structures, so that the first air duct 9 is arranged around the front, left and right sides of the frying drum 6.

[0035] Based on this, multiple first air guide ribs 51 are spaced apart along the curvature of the second air guide plate 5. Each first air guide rib 51 abuts against the inner cover 4 of the air duct and extends from the air inlet end to the air outlet end of the first air duct 9. The first air guide rib 51 is a strip-shaped protrusion structure standing on the surface of the second air guide plate 5. Its top contacts the inner surface of the inner cover 4 of the air duct, dividing the internal space of the first air duct 9 into multiple independent channels along the curvature. Adjacent first air guide ribs 51 form independent first branch air ducts. After entering the first air duct 9, the cold air is evenly distributed into multiple independent flow channels. Since the first air guide ribs 51 extend from the air inlet end to the air outlet end and are separated from each other, the airflow in each branch air duct does not interfere with each other, avoiding turbulence and energy loss caused by mixing of airflow in the curved path. This allows the cold air to be stably and evenly distributed to the circumferential areas of the outer wall of the frying barrel 6, ensuring that the outer wall of the frying barrel 6 obtains a consistent cooling effect in the circumferential direction and preventing local overheating.

[0036] Correspondingly, the air outlet of the first air duct 9 is only located in these three directions, so that the cooling airflow is concentrated on the high-temperature area that the user can easily touch, while no excessive cooling airflow is needed for the rear side that the user cannot easily touch. This optimizes the airflow distribution while ensuring the safety of use and avoids unnecessary waste of cooling air.

[0037] Referring to Figures 5 and 10, the housing 1 includes a lower housing 13 and an upper housing 14 disposed above and connected to the lower housing 13. The lower edge of the upper housing 14 extends downward and covers the outer side of the top side of the lower housing 13, forming a nested fit structure between the upper housing 14 and the lower housing 13. An electrical receiving cavity 11 is formed between the top surface of the lower housing 13 and the upper housing 14, that is, the electrical receiving cavity 11 is a space jointly enclosed by the lower housing 13 and the upper housing 14. A heating cavity 12 is formed in the lower housing 13. Multiple second air guide ribs 1321 are spaced apart below the first air distribution duct on the side of the lower housing 13. These second air guide ribs 1321 abut against the inner side of the upper housing 14, thereby forming multiple exhaust ports 15 with open ends and their axes arranged along the extension direction of the outer wall of the fryer 6. Each exhaust port 15 is connected to a corresponding first air distribution duct.

[0038] Please see Figure 14 and 15 Specifically, the lower shell 13 includes a base 131, an electrical mounting cover 132, and two reinforcing brackets 133. The base 131 is L-shaped and has a bottom wall and a support wall that rises from one side of the bottom wall. The electrical mounting cover 132 is disposed above the base 131 and forms a heating cavity 12 with the base 131. The electrical mounting cover 132 is used to install various electrical components such as heating tubes 10, hot air fans 8, cold air fans 2, and motors.

[0039] The rear and left and right sides are partially connected to the support wall. Two reinforcing brackets 133 are respectively located on the left and right sides inside the base 131. The upper end of each reinforcing bracket 133 extends along the corresponding side edge of the electrical mounting cover 132 and is connected. The middle and lower ends are respectively connected to the inner side and inner bottom of the base 131. Through this structure, two symmetrically arranged reinforcing brackets 133 on the left and right sides inside the base 131 form a multi-point, multi-directional three-dimensional constraint frame between the electrical mounting cover 132 and the base 131. Under the action of high-temperature thermal expansion of the heating chamber 12 and the alternating load generated by the user repeatedly pushing and pulling the frying bucket 6, it can effectively limit the electrical mounting cover 132 from sinking, tilting or lateral displacement, and ensure that the mating gap between the air outlet of the first air duct 9 and the exhaust port 15, and between the exhaust port 15 and the air inlet of the handle sleeve 7, is always kept within the design allowable range. This avoids leakage, deflection or flow rate attenuation of the cooling airflow at the air duct path interface due to component misalignment or loosening, and ensures that the cold air tightly surrounds the outer wall of the frying bucket 6 along the predetermined path and is smoothly introduced into the second air duct 16, so that the active cooling effect of the whole machine remains stable and reliable during long-term use. Furthermore, the edge of the electrical mounting cover 132 is provided with a mounting groove for the upper end of the reinforcing bracket 133 to be embedded. This mounting groove provides a precise embedding and positioning point for the upper end of the reinforcing bracket 133, which plays a role in quick alignment and error prevention during assembly, simplifying the installation process and improving assembly efficiency. At the same time, after the upper end of the bracket is embedded in the groove, it is constrained by the groove wall in both the horizontal and vertical directions, further limiting the lateral movement and longitudinal dislodgement of the upper end of the bracket, enhancing the connection rigidity between the bracket and the electrical mounting cover 132, and improving the vibration and impact resistance of the entire support frame. Thus, it can maintain the relative positional accuracy of each component of the air duct under long-term high-temperature cycling and mechanical vibration environment, effectively extending the durability of the cooling air duct sealing effect and heat dissipation performance.

[0040] Please see Figure 7-9In addition, the air fryer also includes a sealing ring 18 surrounding the edge of the electrical mounting cover 132 facing the heating chamber 12. The sealing ring 18 has a V-shaped cross-section 1801 on its front and left and right sides, and a straight cross-section 1802 on its rear edge. After the frying bucket 6 is placed into the heating chamber 12, the sealing ring 18 forms circumferential contact with the edge of the glass frying bucket 6, effectively blocking the leakage of high-temperature airflow from the heating chamber 12, preventing hot air from entering the electrical housing 11 and affecting electrical components such as the cooling fan 2, and also preventing external cold air from being directly drawn in without the cooling air duct, ensuring the independence of the hot air circulation and cooling air path of the whole machine. The sealing ring 18 features a V-shaped cross-section 1801 on its front and left / right edges. When the glass frying bucket 6 is pushed or pulled into or out of the heating chamber 12, the two inclined sides of the V-shaped cross-section can form an elastic line contact with the edge of the glass pot. The elastic deformation of the V-shaped opening tightly seals the pot, achieving an effective seal. Furthermore, the inclined guide significantly reduces sliding resistance during the pushing and pulling process, making the glass frying bucket 6 move in and out more smoothly. This avoids the problems of traditional round or square sealing rings 18 causing jamming or damage due to excessive interference fit. Simultaneously, the rear edge of the sealing ring 18 adopts a straight surface structure 1802. The rear side does not require frequent pushing and pulling. The straight surface structure 1802 provides more stable support rigidity and a larger contact area, ensuring that the sealing pressure on the rear side is uniform after the frying bucket 6 is fully inserted, and preventing gaps due to excessive elastic deformation. This comprehensively improves the sealing reliability of the heating chamber 12 during cooking while ensuring smooth operation.

[0041] In addition, the top of the upper shell 14 is provided with an opening, and the housing 1 also includes a top cover 1401 detachably mounted on the opening. The top cover 1401 and the upper shell 14 can be detachably connected by a snap-fit ​​connection or a threaded connection, so as to facilitate opening and closing by the user. By providing an opening on the top of the upper shell 14 and configuring a detachable top cover 1401, the user can easily open the top cover 1401 to maintain or clean components such as the cooling fan 2 inside the electrical housing 11, and it also facilitates installation operations during the assembly process. There is an assembly gap between the top cover 1401 and the top of the upper shell 14, through which external air can naturally enter the electrical housing 11, continuously replenishing fresh cooling air for the cooling fan 2, ensuring smooth air intake, avoiding negative pressure or insufficient air intake due to the housing 1 being closed, and further enhancing the continuous heat dissipation capacity of the entire machine.

[0042] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. An enhanced glass air fryer with a cooling air duct, characterized in that, include: The casing (1) has an electrical housing (11) at the top and a heating chamber (12) at the bottom; a cooling fan (2) is rotatably disposed in the electrical housing (11); a heating assembly (3) is disposed at the top of the heating chamber (12); a first air duct (9) is disposed in the electrical housing (11), with its air inlet end surrounding the cooling fan (2) and communicating with the electrical housing (11), and its air outlet end communicating with the heating chamber (12) and circling the heating chamber (12); and a frying bucket (6) that can be pushed and pulled in and out of the casing. The heating chamber (12) is used to blow cold air out from the air outlet through the first air duct (9) after the frying bucket (6) is placed in the heating chamber (12). The cold air surrounds the outer side of the frying bucket (6) and flows along its height direction. The handle (61) is connected to both sides of the frying bucket (6). The handle sleeve (7) is fitted onto the handle (61). Its upper end is provided with a clamping groove for the handle (61) to be fitted into, and its lower end moves away from the handle along the height direction of the outer wall of the frying bucket (6). Extending in the direction of 61), the inner wall of the handle cover (7) extends along its shape to form a second air duct (16). The side of the second air duct (16) facing the handle (61) is open. The air inlet of the second air duct (16) penetrates the upper surface of the handle cover (7) and connects with the air outlet of the first air duct (9). The air outlet extends to the lower end of the handle cover (7) and faces the outer side of the fryer (6), for guiding the cold air output from the air outlet of the first air duct (9) into the handle. The handle jacket (7) is inside and flows through the handle (61) to remove the heat radiated from the fryer bucket (6) to the handle (61); it also includes a first air guide plate (17), which is located at the lower end of the handle jacket (7) and connected to the handle jacket (7), and corresponds to the side opening of the second air duct (16), for guiding the cold air flowing through the handle (61) to continue to flow downward, and to be discharged through the air outlet of the second air duct (16) and blown to the area of ​​the fryer bucket (6) not covered by the handle jacket (7).

2. The enhanced glass air fryer with cooling duct according to claim 1, characterized in that, The first air duct (9) includes: an inner cover (4) surrounding the cooling fan (2) and a second air guide plate (5), the inner cover (4) and the second air guide plate (5) being arranged opposite to each other and combined to form the first air duct (9).

3. The enhanced glass air fryer with cooling duct according to claim 2, characterized in that, The second air guide plate (5) is provided with multiple first air guide ribs (51) spaced apart along its circumferential direction. Each first air guide rib (51) abuts against the inner cover (4) of the air duct and divides the first air duct (9) into multiple independent first branch air ducts extending from the air inlet to the air outlet.

4. The enhanced glass air fryer with cooling duct according to claim 3, characterized in that, The housing (1) includes a lower shell (13) and an upper shell (14) disposed above and connected thereto. The lower edge of the upper shell (14) extends downward and covers the outer side of the top side of the lower shell (13). The electrical receiving cavity (11) is formed between the top surface of the lower shell (13) and the upper shell (14). The heating cavity (12) is formed in the lower shell (13). The top side of the lower shell (13) is provided with multiple second air guide ribs (1321) spaced below the first air distribution channel. The second air guide ribs (1321) abut against the inner side of the upper shell (14) to form multiple exhaust ports (15) with open ends and their axes arranged along the extension direction of the outer wall of the fryer (6). Each exhaust port (15) is connected to the corresponding first air distribution channel.

5. The enhanced glass air fryer with cooling ducts according to claim 4, characterized in that, The lower shell (13) includes: a base (131), an electrical mounting cover (132), and two reinforcing brackets (133). The base (131) is L-shaped and has a bottom wall and a support wall that rises from one side of the bottom wall. The electrical mounting cover (132) is disposed above the base (131) and forms the heating cavity (12) with the base (131). Parts of its rear side and left and right sides are connected to the support wall. The two reinforcing brackets (133) are respectively disposed on the left and right sides inside the base (131). The upper end of each reinforcing bracket (133) extends along the corresponding side edge of the electrical mounting cover (132) and is connected. The middle and lower ends are respectively connected to the inner side and inner bottom surface of the base (131).

6. The enhanced glass air fryer with cooling ducts according to claim 5, characterized in that, The edge of the electrical mounting cover (132) is provided with a mounting groove for the upper end of the reinforcing bracket (133) to be embedded.

7. The enhanced glass air fryer with cooling duct according to claim 1, characterized in that, The air inlet end of the handle cover (7) is a plurality of air inlets (722) arranged side by side. The inner side of the handle cover (7) is provided with a plurality of third air guide ribs (723) spaced apart. One end of each third air guide rib (723) is connected to at least one air inlet (722), and the other end extends to the bottom of the handle cover (7) with the end extending in the horizontal direction. A second air duct is formed between adjacent third air guide ribs (723). A plurality of second air ducts form a second air duct (16). The first air guide plate (17) covers a plurality of second air ducts at the same time, and its lower end abuts against the upper surface of the end of the third air guide rib (723), and its two sides are connected to the handle cover (7).

8. The enhanced glass air fryer with cooling ducts according to claim 7, characterized in that, The upper surface of the handle cover (7) is provided with a wind deflector (721) on the outside of the air inlet end. The wind deflector (721) blocks the outward diffused wind discharged from the air outlet end of the first air duct (9) and concentrates it into the air inlet end of the second air duct (16).

9. The enhanced glass air fryer with cooling ducts according to claim 5, characterized in that, Also includes: A sealing ring (18) is provided around the edge of the electrical mounting cover (132) facing the heating chamber (12). The front and left and right edges of the sealing ring (18) have a V-shaped cross-section, and the rear edge has a straight surface structure (1802).

10. The enhanced glass air fryer with cooling ducts according to any one of claims 1 to 9, characterized in that, The upper shell (14) has an opening at the top, and the housing (1) further includes a top cover (1401) that is detachably placed over the opening.

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