Food baking appliance capable of optimizing heat dissipation

Abstract

The food baking appliance comprises a machine shell, a cooking cavity, an airflow driving assembly and a hot air duct are arranged in the machine shell, the airflow driving assembly and the hot air duct are arranged on the outer side of the cooking cavity, the airflow driving assembly comprises a motor, a hot air fan and a cooling fan, the hot air fan and the cooling fan are connected with an output shaft of the motor, and the air inlet end and the air outlet end of the hot air duct communicate with the cooking cavity. The hot air fan is arranged in the hot air duct, a gap is formed between the machine shell and the cooking cavity to form a heat dissipation air duct surrounding the peripheral side of the cooking cavity, the air inlet end and the air outlet end of the heat dissipation air duct are communicated with an air inlet hole and an air outlet hole in the machine shell respectively, the heat dissipation fan is arranged in the heat dissipation air duct, and the motor drives the hot air fan and the heat dissipation fan to rotate synchronously. And hot air for heating food materials is provided for the cooking cavity, and external air is sucked into the heat dissipation air channel. According to the food baking appliance, the heat dissipation air channel is formed between the cooking cavity and the machine shell to prevent high temperature of the cooking cavity from being transmitted to the machine shell, the service life of the food baking appliance is prolonged by reducing the temperature of the machine shell, and a user is prevented from being scalded.

Description

Technical Field

[0001] The utility model relates to the field of baking equipment, in particular to a food baking utensil with optimized heat dissipation. Background Art

[0002] Food baking appliances such as air fryers use fans to drive air circulation in the cooking cavity. The air is heated by the heating tube and then blown toward the food to heat and cook the food. The space inside the existing air fryer casing is divided by a reflective cover to form an upper installation cavity and a lower cooking cavity. The installation cavity is provided with a motor and a cooling fan, and the cooking cavity is provided with a hot air fan and a heating element. Furthermore, in order to improve the heat dissipation of the motor, a heat dissipation duct connected to the outside is usually provided in the installation cavity to discharge the heat of the motor during the operation of the air fryer. As the temperature inside the cooking cavity rises, the temperature of the casing surrounding the cooking cavity also rises. Due to the lack of heat dissipation around the cooking cavity and the casing, the casing becomes hot, which not only easily causes the casing to deform or even melt, but also easily burns the user.

[0003] For example, in the prior art, patent CN207604858U discloses an oven. When the motor drives the fan to work, a strong convection circulating wind is formed in the centrifugal wind pressure chamber, which can flow into the cooking chamber through the top and bottom air ducts and spray onto the food, thereby facilitating uniform heating of the upper and lower surfaces of the food and improving the heating effect. The above solution does not involve the heat dissipation of the motor and the casing, and there is room for improvement in terms of optimizing the heat dissipation of the casing to extend its service life and reduce the risk of scalding users. Utility Model Content

[0004] In order to solve the technical problems in the prior art that the high temperature generated by the cooking cavity causes the temperature of the outer casing to rise high, the lack of heat dissipation of the casing causes the casing to become hot and cause its structure to deform and easily scald the user, the utility model provides a food baking utensil with optimized heat dissipation, which aims to form a heat dissipation duct between the cooking cavity and the casing to block the high temperature of the cooking cavity from being transmitted to the casing, thereby extending its service life by lowering the temperature of the casing and preventing scalding the user.

[0005] The utility model discloses a food baking utensil with optimized heat dissipation, comprising a casing, wherein a cooking cavity is arranged in the casing, an air flow driving component and a hot air duct arranged outside the cooking cavity, the air flow driving component comprising a motor, a hot air fan and a heat dissipation fan connected to an output shaft of the motor, an air inlet end and an air outlet end of the hot air duct being respectively communicated with the cooking cavity, the hot air fan being arranged in the hot air duct, a gap being provided between the casing and the cooking cavity to form a heat dissipation duct surrounding the cooking cavity, an air inlet end and an air outlet end of the heat dissipation duct being respectively communicated with an air inlet hole and an air outlet hole on the casing, the heat dissipation fan being arranged in the heat dissipation duct, and the motor driving the hot air fan and the heat dissipation fan to rotate synchronously to provide hot air for heating food materials into the cooking cavity and to draw external air into the heat dissipation duct.

[0006] The food baking utensil with optimized heat dissipation of the utility model also has the following additional technical features:

[0007] The diameter of the blades of the heat dissipation fan is greater than the diameter of the blades of the hot air fan.

[0008] The air inlet is arranged on a side of the housing away from the heat dissipation fan.

[0009] At least one of the left side wall, the right side wall and the top wall of the casing is provided with the air inlet hole.

[0010] A motor mounting plate and a cover shell in the shape of a volute are provided in the heat dissipation duct, the airflow drive assembly is installed on the motor mounting plate, the motor mounting plate and the cover shell together form a heat dissipation cavity for covering the motor and the heat dissipation fan, and an exhaust duct connecting the heat dissipation cavity with the air outlet is also provided in the heat dissipation duct.

[0011] An air supply channel is provided between the heat dissipation air channel and the cooking cavity. A one-way valve is provided in the air supply channel. The one-way valve is unidirectionally conducted from the heat dissipation air channel to the cooking cavity.

[0012] The casing is provided with an opening communicating with the cooking cavity and a door body installed at the opening; the airflow driving assembly is arranged on a side of the cooking cavity away from the door body; and the one-way valve is arranged close to the airflow driving assembly relative to the door body.

[0013] A heat dissipation cavity surrounding the motor and the heat dissipation fan is provided in the heat dissipation air duct, the heat dissipation cavity is provided with an air inlet, the cooking cavity is provided with an air outlet, an exhaust pipe connected to the heat dissipation cavity is provided at the air outlet, and the hot air flowing into the heat dissipation cavity from the air outlet and the cold air flowing into the heat dissipation cavity from the air inlet are mixed in the heat dissipation cavity and then discharged from the casing.

[0014] A heating element and a catalytic module arranged below the heating element are arranged in the hot air duct, and the heating element and the catalytic module are located at the top of the cooking cavity.

[0015] The heat dissipation cavity is vertically arranged outside the lower end of the cooking cavity, and the air outlet is arranged at the upper end of the cooking cavity, higher than the heat dissipation cavity.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The food baking utensil with optimized heat dissipation of the utility model can realize heat dissipation of the casing by using the heat dissipation duct around the cooking cavity on the basis of realizing heat dissipation of the motor by the heat dissipation fan, which is beneficial to reduce the surface temperature of the casing, prolong its service life and reduce the risk of users being scalded by the high-temperature casing.

[0018] The motor can drive the hot air fan and the heat dissipation fan to rotate synchronously at the same time, which not only ensures the air circulation inside the cooking chamber to heat the ingredients while saving energy, but also realizes the heat dissipation of the motor and the casing.

[0019] 2. As a preferred embodiment, the diameter of the blades of the cooling fan is larger than the diameter of the blades of the hot air fan. Using a cooling fan with larger blades can increase the suction force of the cooling fan to inhale more external air, increase the air intake in the cooling air duct, and improve the heat dissipation efficiency of the motor and the housing.

[0020] 3. As a preferred embodiment, the air inlet is arranged on a side of the housing away from the heat dissipation fan. This embodiment can extend the path of the cold air flowing from the air inlet into the heat dissipation duct and along the heat dissipation duct, so that the cold air can effectively dissipate heat from the outside of the cooking cavity along the way, thereby avoiding the temperature rise of the housing, improving the utilization rate of the cold air, and ensuring the heat dissipation effect of the housing.

[0021] As a preferred embodiment of the present embodiment, at least one of the left side wall, the right side wall and the top wall of the housing is provided with the air inlet hole. When multiple air inlet holes are provided, the air intake per unit time can be increased, and it is beneficial to allow air to enter from multiple directions, thereby improving the heat dissipation efficiency of the motor and the housing and improving the uniformity of heat dissipation of the housing.

[0022] 4. As a preferred embodiment, a motor mounting plate and a cover in the shape of a volute are provided in the heat dissipation duct, the airflow drive assembly is installed on the motor mounting plate, the motor mounting plate and the cover together form a heat dissipation cavity for housing the motor and the heat dissipation fan, and an exhaust duct for connecting the heat dissipation cavity with the air outlet is also provided in the heat dissipation duct. The motor mounting plate not only provides installation for the airflow drive assembly, but also forms a heat dissipation cavity with the cover, and the heat dissipation cavity can gather the heat of the motor and discharge the heat of the motor through the exhaust duct, which can prevent the heat of the motor from being dispersed in the heat dissipation duct and causing the temperature rise of the casing, and is conducive to improving the heat dissipation of the motor and the casing.

[0023] 5. As a preferred embodiment, an air supply channel is provided between the heat dissipation duct and the cooking cavity, and a one-way valve is provided in the air supply channel, and the one-way valve is unidirectionally connected from the heat dissipation duct to the cooking cavity. By providing the air supply channel, a part of the air flow in the heat dissipation duct can flow into the cooking cavity through the air supply channel to supplement the air and provide the oxygen required by the catalytic module to catalyze the oil smoke, thereby improving the oil smoke catalysis efficiency.

[0024] As a preferred embodiment of the present embodiment, the housing is provided with an opening communicating with the cooking cavity and a door body installed at the opening, the airflow drive assembly is provided at a side of the cooking cavity away from the door body, and the one-way valve is provided close to the airflow drive assembly relative to the door body. The one-way valve is provided close to the airflow drive assembly, which is conducive to forming negative pressure at the position of the hot air fan and positive pressure at the position of the heat dissipation fan, thereby forcing the one-way valve to open so that a part of the air enters the cooking cavity to provide the oxygen required by the catalytic module to catalyze the oil smoke.

[0025] 6. As a preferred embodiment, a heat dissipation cavity surrounding the motor and the heat dissipation fan is provided in the heat dissipation duct, the heat dissipation cavity is provided with an air inlet, the cooking cavity is provided with an air outlet, an exhaust pipe connected to the heat dissipation cavity is provided at the air outlet, and the hot air flowing into the heat dissipation cavity from the air outlet and the cold air flowing into the heat dissipation cavity from the air inlet are mixed in the heat dissipation cavity and then discharged from the housing. Therefore, when the cooking cavity is exhausted, the hot air flowing out of the cooking cavity is mixed with a part of the external cold air in the heat dissipation cavity and then discharged from the housing. Compared with the prior art in which the hot air in the cooking cavity is directly discharged, the temperature of the exhaust position of the housing can be reduced, and the local temperature of the housing can be prevented from being too high, which can easily scald the user.

[0026] 7. As a preferred embodiment, a heating element and a catalytic module disposed below the heating element are disposed in the hot air duct, and the heating element and the catalytic module are located at the top of the cooking cavity. By providing the catalytic module, the air with oil smoke can be catalytically purified by the catalytic module before heating the food, which can improve the quality of the food cooked and the taste of the food.

[0027] 8. As a preferred embodiment, the heat dissipation cavity is vertically arranged outside the lower end of the cooking cavity, and the air outlet is arranged at the upper end of the cooking cavity, higher than the heat dissipation cavity. The present application arranges the airflow drive assembly on one lateral side of the cooking cavity, which can make the body have more space in the axial direction to improve the arrangement of the structural parts in the axial direction. At the same time, by increasing the distance between the air outlet and the heat dissipation cavity, it is conducive to extending the flow path of the hot air flowing out of the cooking cavity to reduce the temperature of the hot air, so that the temperature of the air that finally reaches the air outlet of the casing is lower, thereby improving the heat dissipation effect of the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the appearance of a food baking utensil according to one embodiment of the present application.

[0030] Figure 2 The figure is a schematic internal cross-sectional view of a food baking appliance according to one embodiment of the present application.

[0031] Figure 3 This is a schematic diagram of the arrangement of the gas supplement channel in one embodiment of the present application.

[0032] Figure 4 This is a schematic diagram of the air inlet path of the casing under one implementation mode of the present application.

[0033] Figure 5 An exploded schematic diagram of an airflow drive assembly and related accessories according to one embodiment of the present application.

[0034] Reference numerals:

[0035] 10. Casing; 11. Cooking cavity; 12. Hot air duct; 13. Motor; 14. Hot air fan; 15. Cooling fan; 16. Cooling duct; 101. Air inlet; 102. Air outlet; 17. Motor mounting plate; 18. Cover; 19. Cooling cavity; 20. Exhaust duct; 171. Air inlet; 111. Air outlet; 21. Exhaust pipe; 22. Duct plate; 23. Heating element; 24. Catalytic module; 25. Air supply channel; 26. One-way valve; 27. Door body. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0037] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0039] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0041] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are only connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0042] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0043] like Figures 1 to 5 As shown, the present application provides a food baking appliance with optimized heat dissipation, including a casing 10, a cooking cavity 11 is arranged in the casing 10, an air flow driving component and a hot air duct 12 are arranged outside the cooking cavity 11, the air flow driving component includes a motor 13, a hot air fan 14 and a heat dissipation fan 15 connected to the output shaft of the motor 13, an air inlet end and an air outlet end of the hot air duct 12 are respectively communicated with the cooking cavity 11, the hot air fan 14 is arranged in the hot air duct 12, a gap is provided between the casing 10 and the cooking cavity 11 to form a heat dissipation duct 16 surrounding the cooking cavity 11, the air inlet end and the air outlet end of the heat dissipation duct 16 are respectively communicated with the air inlet hole 101 and the air outlet hole 102 on the casing 10, the heat dissipation fan 15 is arranged in the heat dissipation duct 16, the motor 13 drives the hot air fan 14 and the heat dissipation fan 15 to rotate synchronously to provide hot air for heating food into the cooking cavity 11 and to inhale external air into the heat dissipation duct 16.

[0044] The food baking appliance with optimized heat dissipation of the utility model can realize heat dissipation of the housing 10 by using the heat dissipation duct 16 around the cooking cavity 11 on the basis of realizing heat dissipation of the motor 13 by the heat dissipation fan 15, which is beneficial to reduce the surface temperature of the housing 10, prolong its service life and reduce the risk of users being scalded by the high-temperature housing 10. The motor 13 can drive the hot air fan 14 and the heat dissipation fan 15 to rotate synchronously at the same time, which not only ensures the air circulation inside the cooking cavity 11 to heat the food, but also realizes the heat dissipation of the motor 13 and the housing 10 under the premise of saving energy.

[0045] Specifically, the airflow driving component can be disposed above or on the side of the cooking cavity 11, and the present application does not limit this. For example, Figure 2As shown, the airflow driving assembly is arranged on the horizontal side of the cooking cavity 11, and the hot air duct 12 is also arranged on the horizontal side of the cooking cavity 11, with the lower end being the air inlet end and the upper end being the air outlet end. The air in the cooking cavity 11 is sucked into the hot air duct 12 by the hot air fan 14, flows along the hot air duct 12, and then flows back to the cooking cavity 11 from the air outlet end. The air is heated by the heating element 23 and then blown to the food to cook the food. The heat dissipation duct 16 surrounds the cooking cavity 11 and the hot air duct 12 to form a heat insulation space. The cold air flows in the heat dissipation duct 16 to cool the outside of the cooking cavity 11, thereby reducing the temperature of the housing 10, preventing the housing 10 from being deformed or melted under the influence of high temperature for a long time, thereby extending its service life. Among them, the motor 13 is arranged in the heat dissipation duct 16. The cold air dissipates the heat of the housing 10 while dissipating the heat of the motor 13, which can prevent the motor 13 from overheating and affecting its performance.

[0046] As a preferred embodiment, the diameter of the blades of the cooling fan 15 is larger than the diameter of the blades of the hot air fan 14. The cooling fan 15 with larger blades can improve the suction force of the cooling fan 15 to inhale more external air, increase the air intake in the cooling air duct 16, and improve the heat dissipation efficiency of the motor 13 and the housing 10.

[0047] As a preferred embodiment, the air inlet 101 is disposed on a side of the housing 10 away from the heat dissipation fan 15. This embodiment can extend the path of the cold air flowing from the air inlet 101 into the heat dissipation duct 16 and along the heat dissipation duct 16, so that the cold air can effectively dissipate heat from the outside of the cooking cavity 11 along the way, thereby avoiding the temperature rise of the housing 10, improving the utilization rate of the cold air, and ensuring the heat dissipation effect of the housing 10.

[0048] like Figure 1 , Figure 2 and Figure 4 As shown, the cooling fan 15 is, for example, disposed in an area near the rear end of the housing 10, and the air inlet 101 is disposed in an area near the front end of the housing 10 (the end facing the user is the front end). The cooling air duct 16 has a sufficiently long path to allow the cold air to flow through the surface of the housing 10 during the flow process, thereby cooling down various positions of the housing 10 and improving the uniformity of the heat dissipation of the housing 10.

[0049] As a preferred embodiment of the present embodiment, at least one of the left side wall, the right side wall and the top wall of the housing 10 is provided with an air inlet hole 101 .

[0050] like Figure 1 and Figure 4As shown, the left side wall, right side wall and top wall of the casing 10 are all provided with air inlet holes 101. The air inlet holes 101 on the left side wall and the right side wall are arranged in a vertical array, for example, and the air inlet holes 101 on the top wall are arranged in a horizontal array, which is beneficial to increase the air intake per unit time and to allow air to enter from multiple directions, thereby improving the heat dissipation efficiency of the motor 13 and the casing 10 and improving the uniformity of heat dissipation of the casing 10.

[0051] As a preferred embodiment, a motor mounting plate 17 and a cover 18 in the shape of a volute are provided in the heat dissipation duct 16, and the airflow drive assembly is installed on the motor mounting plate 17. The motor mounting plate 17 and the cover 18 enclose a heat dissipation cavity 19 for housing the motor 13 and the heat dissipation fan 15. The heat dissipation duct 16 is also provided with an exhaust duct 20 that connects the heat dissipation cavity 19 with the air outlet 102.

[0052] like Figure 2 and Figure 5 As shown, the motor mounting plate 17 not only provides installation for the airflow drive assembly, but also forms a heat dissipation cavity 19 with the cover 18. The heat dissipation cavity 19 can gather the heat of the motor 13 and discharge the heat of the motor 13 through the exhaust duct 20, thereby preventing the heat of the motor 13 from being dissipated in the heat dissipation duct 16 and causing the temperature of the casing 10 to rise, which is beneficial to improving the heat dissipation of the motor 13 and the casing 10.

[0053] One end of the output shaft of the motor 13 passes through the motor mounting plate 17 and is then connected to the hot air fan 14, and the other end of the output shaft of the motor 13 is connected to the cooling fan 15. The housing 18 has a housing 18 side wall extending toward the motor mounting plate 17 so as to enclose with the motor mounting plate 17 to form a closed cooling chamber 19, which improves the heat dissipation of the motor 13 and prevents the noise generated by the motor 13 from being transmitted outward. The volute-shaped cooling chamber 19 includes an arc-shaped air duct surrounding the motor 13 and a horizontal air duct located on one side of the arc-shaped air duct, the horizontal air duct forming an air outlet end, and communicating with one end of the exhaust air duct 20, and the other end of the exhaust air duct 20 is communicated with the air outlet 102.

[0054] In another embodiment, a heat dissipation cavity 19 surrounding the motor 13 and the heat dissipation fan 15 is provided in the heat dissipation duct 16, the heat dissipation cavity 19 is provided with an air inlet 171, and the cooking cavity 11 is provided with an air outlet 111. An exhaust pipe 21 connected to the heat dissipation cavity 19 is provided at the air outlet 111. The hot air flowing into the heat dissipation cavity 19 from the air outlet 111 and the cold air flowing into the heat dissipation cavity 19 from the air inlet 171 are mixed in the heat dissipation cavity 19 and then discharged from the casing 10.

[0055] As the cooking cavity 11 increases in temperature and pressure during operation, the cooking cavity 11 needs to be vented to adjust the internal pressure. If the hot air in the cooking cavity 11 is directly discharged through the casing 10, the temperature of the casing 10 will inevitably be too high. In order to solve the problem of excessive temperature at the exhaust position of the casing 10, the present application mixes the hot air flowing out of the cooking cavity 11 with a portion of external cold air in the heat dissipation cavity 19 before discharging the mixture out of the casing 10, which can effectively reduce the temperature of the air reaching the air outlet 102, thereby avoiding excessive local temperature of the casing 10.

[0056] like Figure 2 As shown, one end of the exhaust pipe 21 is connected to the air outlet 111, and the other end is connected to the heat dissipation cavity 19. The heat dissipation cavity 19 is, for example, formed by enclosing the motor mounting plate 17 and the cover 18, and the motor mounting plate 17 is provided with an air inlet 171. Further, the air outlet 102 is, for example, provided on the side of the housing 10 away from the heat dissipation fan 15, and an exhaust duct 20 is provided between the heat dissipation cavity 19 and the air outlet 102. When the cooking cavity 11 is exhausted, the hot air exhausted from the cooking cavity 11 enters the heat dissipation cavity 19 through the exhaust pipe 21, and the external air flowing into the heat dissipation duct 16 enters the heat dissipation cavity 19 through the air inlet 171. The two parts of air are mixed to cool the exhaust gas to the outside, and finally discharged from the exhaust duct 20 through the air outlet 102, which not only prevents the housing 10 from being heated at the air outlet 102, but also prevents the exhaust gas from directly scalding the user.

[0057] Furthermore, in one embodiment, the heat dissipation cavity 19 is vertically arranged outside the lower end of the cooking cavity 11, and the air outlet 111 is arranged at the upper end of the cooking cavity 11, higher than the heat dissipation cavity 19. The present application arranges the airflow driving assembly on one lateral side of the cooking cavity 11, which can make the body have more space in the axial direction to improve the arrangement of the structural parts in the axial direction. At the same time, by increasing the distance between the air outlet 111 and the heat dissipation cavity 19, it is beneficial to extend the flow path of the hot air flowing out of the cooking cavity 11 to reduce the temperature of the hot air, so that the temperature of the air finally reaching the air outlet 102 of the housing 10 is lower, thereby improving the heat dissipation effect of the housing 10.

[0058] As a preferred embodiment, Figure 2 and Figure 5 As shown, the casing 10 is provided with an air duct plate 22, a motor mounting plate 17 and a cover 18. The motor mounting plate 17 and the cover 18 surround the motor 13 and the cooling fan 15 on the inner side and are fixed to the air duct plate 22 through the motor mounting plate 17. The air duct plate 22 is covered on the outer side of the hot air fan 14. The hot air duct 12 is formed inside the air duct plate 22. There is a gap between the air duct plate 22 and the motor mounting plate 17 so that cold air can enter the cooling cavity 19 through the air inlet 171 on the motor mounting plate 17.

[0059] Furthermore, the hot air duct 12 includes a vertically extending first duct and a horizontal second duct arranged above the cooking cavity 11. A heating element 23 and a catalytic module 24 arranged below the heating element 23 are arranged in the second duct. The heating element 23 and the catalytic module 24 are located at the top of the cooking cavity 11. By providing the catalytic module 24, the air with oil smoke can be catalytically purified by the catalytic module 24 before heating the food, which can improve the quality of the food cooked and improve the taste of the food.

[0060] It is understandable that the catalytic module 24 needs sufficient oxygen to catalyze the oil smoke. If there is insufficient oxygen in the cavity, the catalytic efficiency of the oil smoke will inevitably be affected. As a preferred embodiment, an air supply channel 25 is provided between the heat dissipation duct 16 and the cooking cavity 11. A one-way valve 26 is provided in the air supply channel 25. The one-way valve 26 is unidirectionally connected from the heat dissipation duct 16 to the cooking cavity 11. By providing the air supply channel 25, a part of the air flow in the heat dissipation duct 16 can flow into the cooking cavity 11 through the air supply channel 25 to supplement the air and provide the oxygen required by the catalytic module 24 to catalyze the oil smoke, thereby improving the catalytic efficiency of the oil smoke.

[0061] like Figure 3 As shown, an exhaust duct 20 connected to the air outlet 102 is provided below the cooking cavity 11, and an air supply channel 25 is provided between the exhaust duct 20 and the bottom of the cooking cavity 11. During the flow of air flowing into the heat dissipation cavity 19 along the exhaust duct 20, a part of the air is directly discharged from the air outlet 102, and another part of the air can flow back to the cooking cavity 11 through the air supply channel 25, and then participate in the air flow circulation in the cooking cavity 11 to increase the amount of oxygen required for catalyzing the oil smoke.

[0062] As a preferred embodiment of the present embodiment, the casing 10 is provided with an opening connected to the cooking cavity 11 and a door body 27 installed at the opening, the airflow driving assembly is provided on the side of the cooking cavity 11 away from the door body 27, and the one-way valve 26 relative to the door body 27 is provided close to the airflow driving assembly.

[0063] like Figure 1 and Figure 3 As shown, the one-way valve 26 is arranged close to the airflow driving assembly, which is conducive to forming negative pressure at the position of the hot air fan 14 and positive pressure at the position of the heat dissipation fan 15, thereby forcing the one-way valve 26 to open so that a part of the air enters the cooking cavity 11 to provide the catalytic module 24 with the oxygen required for catalyzing the oil smoke.

[0064] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A food baking appliance with optimized heat dissipation, comprising a housing, a cooking cavity, an air flow driving assembly and a hot air duct arranged outside the cooking cavity, the air flow driving assembly comprising a motor, a hot air fan connected to an output shaft of the motor, and a heat dissipation fan, the air inlet and the air outlet of the hot air duct are respectively connected to the cooking cavity, the hot air fan is arranged in the hot air duct, and is characterized in that: A gap is provided between the casing and the cooking cavity to form a heat dissipation duct surrounding the circumference of the cooking cavity, an air inlet end and an air outlet end of the heat dissipation duct are respectively connected to an air inlet hole and an air outlet hole on the casing, the heat dissipation fan is arranged in the heat dissipation duct, and the motor drives the hot air fan and the heat dissipation fan to rotate synchronously to provide hot air for heating food into the cooking cavity and to draw external air into the heat dissipation duct.

2. A food baking utensil with optimized heat dissipation according to claim 1, characterized in that: The diameter of the blades of the heat dissipation fan is greater than the diameter of the blades of the hot air fan.

3. The food baking utensil with optimized heat dissipation according to claim 1, characterized in that: The air inlet is arranged on a side of the housing away from the heat dissipation fan.

4. The food baking utensil with optimized heat dissipation according to claim 3, characterized in that: At least one of the left side wall, the right side wall and the top wall of the casing is provided with the air inlet hole.

5. The food baking utensil with optimized heat dissipation according to claim 1, characterized in that: A motor mounting plate and a cover shell in the shape of a volute are provided in the heat dissipation duct, the airflow drive assembly is installed on the motor mounting plate, the motor mounting plate and the cover shell together form a heat dissipation cavity for covering the motor and the heat dissipation fan, and an exhaust duct connecting the heat dissipation cavity with the air outlet is also provided in the heat dissipation duct.

6. The food baking utensil with optimized heat dissipation according to claim 1, characterized in that: An air supply channel is provided between the heat dissipation air channel and the cooking cavity. A one-way valve is provided in the air supply channel. The one-way valve is unidirectionally conducted from the heat dissipation air channel to the cooking cavity.

7. The food baking utensil with optimized heat dissipation according to claim 6, characterized in that: The casing is provided with an opening communicating with the cooking cavity and a door body installed at the opening; the airflow driving assembly is arranged on a side of the cooking cavity away from the door body; and the one-way valve is arranged close to the airflow driving assembly relative to the door body.

8. The food baking utensil with optimized heat dissipation according to claim 1, characterized in that: A heat dissipation cavity surrounding the motor and the heat dissipation fan is provided in the heat dissipation air duct, the heat dissipation cavity is provided with an air inlet, the cooking cavity is provided with an air outlet, an exhaust pipe connected to the heat dissipation cavity is provided at the air outlet, and the hot air flowing into the heat dissipation cavity from the air outlet and the cold air flowing into the heat dissipation cavity from the air inlet are mixed in the heat dissipation cavity and then discharged from the casing.

9. The food baking utensil with optimized heat dissipation according to claim 1, characterized in that: A heating element and a catalytic module arranged below the heating element are arranged in the hot air duct, and the heating element and the catalytic module are located at the top of the cooking cavity.

10. The food baking utensil with optimized heat dissipation according to claim 8, characterized in that: The heat dissipation cavity is vertically arranged outside the lower end of the cooking cavity, and the air outlet is arranged at the upper end of the cooking cavity, higher than the heat dissipation cavity.

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