Gas guide pipe, fan assembly and cooking electric appliance

Abstract

The utility model discloses an air guide pipe, a fan assembly and a cooking electric appliance. The gas guide pipe is used for the cooking electric appliance, the gas guide pipe comprises an inner pipe, an outer pipe and a plurality of connecting ribs, the inner pipe is used for conveying gas to electrical parts of the cooking electric appliance, the outer pipe is arranged outside the inner pipe in a sleeving mode, a hollow channel is formed between the outer pipe and the inner pipe, the connecting ribs are connected with the outer pipe and the inner pipe, and the connecting ribs are distributed in the circumferential direction of the inner pipe at intervals. Thus, the hollow channel formed between the outer pipe and the inner pipe can achieve isolation between gas in the inner pipe and the environment outside the outer pipe, heat transfer of the external environment to the gas in the inner pipe is reduced, temperature rise caused by the fact that the gas in the inner pipe is affected by the external environment in the conveying process is reduced, and therefore the cooling effect of the gas in the inner pipe is improved. In addition, the outer pipe and the inner pipe are connected through the connecting ribs, the connecting strength of the outer pipe and the inner pipe can be improved, and therefore the structural strength of the air guide pipe is improved, and the hollow channel structure is stable.

Description

Technical Field

[0001] The utility model relates to the field of cooking appliances, in particular to an air guide pipe, a fan component and a cooking appliance. Background Art

[0002] In cooking appliances, especially embedded cooking appliances, such cooking appliances can generate heat during operation, resulting in a high temperature of the cooking appliance itself, which can easily cause chips, cameras and other components with high operating temperature requirements to malfunction and affect the normal operation of the cooking appliance. Therefore, it is necessary to cool down these components during the operation of the cooking appliance. In the related art, the components that need to be cooled are arranged at different positions of the cooking appliance. For this purpose, an air duct can be used to cool down the components at different positions by air cooling. However, the air duct is easily affected by the surrounding environment and heated up, which can easily cause the temperature of the gas transported by the air duct to increase and the cooling effect on the components is poor. Utility Model Content

[0003] The utility model provides an air duct, a fan assembly and a cooking appliance, which are used to at least solve the technical problem that the air duct is easily affected by the surrounding environment and heated up, which easily leads to the temperature increase of the gas transported by the air duct and poor cooling effect on parts.

[0004] The air duct of the embodiment of the present application is used for a cooking appliance. The air duct includes an inner tube, an outer tube and a plurality of connecting ribs. The inner tube is used to transport gas to the electrical components of the cooking appliance. The outer tube is sleeved outside the inner tube. A hollow channel is formed between the outer tube and the inner tube. The connecting ribs connect the outer tube and the inner tube. The plurality of connecting ribs are spaced apart along the circumference of the inner tube.

[0005] In this way, the hollow channel formed between the outer tube and the inner tube can isolate the gas in the inner tube from the environment outside the outer tube, reduce the heat transfer from the external environment to the gas in the inner tube, and reduce the temperature rise of the gas in the inner tube caused by the influence of the external environment during the transportation process, thereby improving the cooling effect of the gas in the inner tube. In addition, multiple connecting ribs connect the outer tube and the inner tube, which can improve the connection strength between the outer tube and the inner tube, thereby improving the structural strength of the air guide tube and making the hollow channel structure stable.

[0006] In certain embodiments, the hollow channels are filled with a thermally insulating medium.

[0007] In this way, the thermal conductivity of the insulation medium is low, and the heat of the environment outside the outer tube is difficult to transfer from the insulation medium to the inner tube, reducing the temperature rise of the gas in the inner tube caused by the influence of the external environment during transportation, thereby improving the cooling effect of the gas in the inner tube.

[0008] In certain embodiments, the hollow channel is a closed cavity, and the connecting ribs close both ends of the hollow channel along the axial direction of the airway tube.

[0009] In this way, the hollow channel can form a closed accommodating space to accommodate the heat insulating medium, preventing the heat insulating medium from flowing out from the end of the air duct, so that the heat insulating medium can be reused, thereby improving the utilization rate of the heat insulating medium and reducing the use cost of the air duct.

[0010] In certain embodiments, the hollow channel penetrates the end surface of the airway tube along the axial direction of the airway tube, and the hollow channel is used to pass gas.

[0011] In this way, the gas can enter from one end of the hollow channel and flow out from the other end of the hollow channel to take away the heat from the external environment and prevent the heat from being transferred from the outer tube to the inner tube through the hollow channel, causing the gas in the inner tube to heat up.

[0012] In certain embodiments, one axial end of the inner tube is retracted into the outer tube.

[0013] In this way, it is convenient to pass the gas into the hollow channel and the inner tube at the same time, so as to avoid the small amount of gas in the hollow channel causing the heat to be transferred to the inner tube and causing the temperature of the gas in the inner tube to rise.

[0014] In certain embodiments, along the radial direction of the airway tube, the width of the hollow channel is greater than or equal to 2 mm.

[0015] In this way, the distance over which heat is transferred from the outer tube to the inner tube can be increased, and the heat insulation area of ​​the hollow channel can be increased, thereby improving the heat insulation efficiency of the hollow channel and reducing the temperature rise of the gas in the inner tube.

[0016] In certain embodiments, a plurality of connecting ribs partition the hollow channel into a plurality of sub-channels, and the plurality of sub-channels are distributed along the circumference of the inner tube and are separated from each other.

[0017] In this way, the multiple connecting ribs make the shape of the hollow channel stable and not easy to deform, which facilitates the smooth flow of gas in the hollow channel, thereby improving the heat insulation effect of the hollow channel.

[0018] The fan assembly of the embodiment of the present application includes an air guide pipe and a fan, and the fan is used to deliver gas into the hollow channel and the inner tube.

[0019] In this way, the fan can drive the gas into the air duct and transport the gas to the electrical components through the air duct to cool the electrical components.

[0020] In certain embodiments, the fan is at least partially disposed within the outer tube.

[0021] In this way, the fan can deliver gas into the hollow channel and make the gas flow out of the hollow channel to take away the heat of the environment outside the outer tube.

[0022] In certain embodiments, the fan assembly further includes an air outlet pipe, one end of which is inserted into the inner pipe and the other end of which faces the electrical component.

[0023] In this way, one end of the outlet pipe is inserted into the inner tube, which can prevent the gas in the hollow channel from mixing with the gas in the inner tube, thereby reducing the heat in the hollow channel that causes the temperature rise of the gas in the inner tube; the other end of the outlet pipe faces the electrical components, so that the gas in the inner tube can flow out from the outlet pipe to cool the electrical components.

[0024] A cooking appliance according to an embodiment of the present application includes a fan assembly.

[0025] In this way, the fan assembly can cool the interior of the cooking appliance, prevent the electrical components in the cooking appliance from malfunctioning due to high temperature, and increase the service life of the cooking appliance.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 It is a schematic diagram of the structure of a cooking appliance according to an embodiment of the utility model;

[0029] Figure 2 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0030] Figure 3 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0031] Figure 4 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0032] Figure 5 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0033] Figure 6 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0034] Figure 7 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0035] Figure 8 It is a schematic structural diagram of an airway tube according to an embodiment of the utility model;

[0036] Fig. 9It is a structural schematic diagram of a fan assembly according to an embodiment of the utility model;

[0037] Fig.10 It is a structural schematic diagram of a fan assembly according to an embodiment of the utility model;

[0038] Fig.11 It is a structural schematic diagram of a fan assembly according to an embodiment of the utility model.

[0039] Explanation of the reference numerals: 100, air duct; 10, inner tube; 11, inner cavity; 20, outer tube; 30, connecting rib; 40, hollow channel; 41, thermal insulation medium; 42, sub-channel; 200, fan; 300, air outlet pipe; 1000, fan assembly; 2000, cooking appliance. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0045] See also Figure 1-Figure 5 The air duct 100 of the embodiment of the present application is used for a cooking appliance 2000. The air duct 100 includes an inner tube 10, an outer tube 20 and a plurality of connecting ribs 30. The inner tube 10 is used to transport gas to the electrical components of the cooking appliance 2000. The outer tube 20 is sleeved outside the inner tube 10. A hollow channel 40 is formed between the outer tube 20 and the inner tube 10. The connecting ribs 30 connect the outer tube 20 and the inner tube 10. The plurality of connecting ribs 30 are distributed at intervals along the circumference of the inner tube 10.

[0046] In this way, the hollow channel 40 formed between the outer tube 20 and the inner tube 10 can achieve the isolation of the gas in the inner tube 10 from the environment outside the outer tube 20, reduce the heat transfer from the external environment to the gas in the inner tube 10, and reduce the temperature rise of the gas in the inner tube 10 caused by the influence of the external environment during the transportation process, thereby improving the cooling effect of the gas in the inner tube 10. In addition, a plurality of connecting ribs 30 connect the outer tube 20 and the inner tube 10, which can improve the connection strength between the outer tube 20 and the inner tube 10, thereby improving the structural strength of the air guide tube 100, and making the structure of the hollow channel 40 stable.

[0047] Specifically, the airway tube 100 includes but is not limited to a silicone airway tube, a plastic airway tube, a sponge airway tube, a steel tube, thermal insulation cotton, etc. That is, the airway tube 100 can be made of one or more materials such as silicone, plastic, sponge, steel, thermal insulation cotton, etc. The airway tube 100 can be a straight tube or a curved tube, and the cross-sectional shape of the airway tube 100 can be circular or square. The shape, size, and curvature of the airway tube 100 can be set according to actual needs.

[0048] The cooking appliance 2000 includes but is not limited to electric steamers, microwave ovens, electric steam boxes, microwave ovens and other equipment that can be used for cooking. The cooking appliance 2000 is provided with electrical components such as chips, cameras, sensors, etc. The cooking appliance 2000 generates heat during the cooking process. The air duct 100 can transport low-temperature gas to the electrical components to cool them down and prevent them from malfunctioning due to overheating.

[0049] The inner tube 10 and the outer tube 20 may be circular tubular structures or square tubular structures, and the size of the outer tube 20 may be larger than that of the inner tube 10. For example, the inner tube 10 is a circular tubular structure, the outer tube 20 is a square tubular structure, and the outer diameter of the inner tube 10 is smaller than the inner side length of the outer tube 20. For another example, the inner tube 10 and the outer tube 20 are both square tubular structures, and the outer side length of the inner tube 10 is smaller than the inner side length of the outer tube 20. For another example, the inner tube 10 and the outer tube 20 are both circular tubular structures, and the outer diameter of the inner tube 10 is smaller than the inner diameter of the outer tube 20. The hollow channel 40 is a channel formed by the gap between the outer side of the inner tube 10 and the inner side of the outer tube 20, and the axial direction of the hollow channel 40 may be consistent with the axial direction of the air guide tube 100. The inner side of the inner tube 10 may form an inner cavity 11 so that the gas flows in the inner cavity 11.

[0050] The inner tube 10, the outer tube 20 and the connecting rib 30 can be integrally formed, or can be connected by welding, gluing or mechanical connection. The materials of the inner tube 10, the outer tube 20 and the connecting rib 30 can be the same or different. For example, the inner tube 10, the outer tube 20 and the connecting rib 30 are all made of plastic materials, and the inner tube 10, the outer tube 20 and the connecting rib 30 can be integrally injection molded, or can be connected by gluing. For another example, the inner tube 10, the outer tube 20 and the connecting rib 30 are all made of metal materials, and the inner tube 10, the outer tube 20 and the connecting rib 30 can be integrally stamped, or can be connected by welding. For another example, the inner tube 10 and the outer tube 20 are made of metal materials, and the connecting rib 30 is made of plastic materials, and the inner tube 10 and the outer tube 20 can be connected to the connecting rib 30 by gluing, mechanical connection, ultrasonic welding, etc. The connecting ribs 30 may connect the inner tube 10 and the outer tube 20 along the axial direction of the air guide tube 100 , or may connect the inner tube 10 and the outer tube 20 along the radial direction of the air guide tube 100 .

[0051] The number of the connecting ribs 30 can be set according to the hardness of the material of the air duct 100. When the hardness of the air duct 100 is high, the number of the connecting ribs 30 can be small, and when the hardness of the air duct 100 is low, the number of the connecting ribs 30 can be large. For example, the number of the connecting ribs 30 can be two, three, four, five or more.

[0052] See also Figure 6 In some embodiments, the hollow channel 40 is filled with a heat insulating medium 41 .

[0053] In this way, the thermal conductivity of the insulation medium 41 is low, and the heat of the environment outside the outer tube 20 is difficult to transfer from the insulation medium 41 to the inner tube 10, reducing the temperature rise of the gas in the inner tube 10 caused by the influence of the external environment during transportation, thereby improving the cooling effect of the gas in the inner tube 10.

[0054] Specifically, the heat insulating medium 41 can be a gas medium, a liquid medium or a solid medium. The heat insulating medium 41 includes but is not limited to materials with low thermal conductivity such as carbon dioxide, coolant, heat insulating cotton, heat insulating glue, and heat insulating rubber. The hollow channel 40 can be filled with one or more of carbon dioxide, coolant, heat insulating cotton, heat insulating glue, and heat insulating rubber. The type and quantity of the heat insulating medium 41 in the hollow channel 40 can be set according to actual needs.

[0055] See also Figure 7 In some embodiments, the hollow channel 40 is a closed cavity, and the connecting ribs 30 close both ends of the hollow channel 40 along the axial direction of the airway tube 100 .

[0056] In this way, the hollow channel 40 can form a closed accommodating space to accommodate the heat insulating medium 41, preventing the heat insulating medium 41 from flowing out from the end of the air duct 100, so that the heat insulating medium 41 can be reused, thereby improving the utilization rate of the heat insulating medium 41 and reducing the use cost of the air duct 100.

[0057] Specifically, the connecting rib 30 can connect the two ends of the inner tube 10 and the outer tube 20 along the radial direction of the air duct 100 to close the two ends of the hollow channel 40 along the axial direction of the air duct 100. The connecting rib 30 can first close one end of the inner tube 10 and the outer tube 20, and after the hollow channel 40 is filled with the heat insulating medium 41, the other end of the inner tube 10 and the outer tube 20 is closed by the connecting rib 30.

[0058] See also Figure 8 In some embodiments, the hollow channel 40 penetrates the end surface of the airway tube 100 along the axial direction of the airway tube 100, and the hollow channel 40 is used to pass gas.

[0059] In this way, the gas can enter from one end of the hollow channel 40 and flow out from the other end of the hollow channel 40 to take away the heat from the external environment and prevent the heat from being transferred from the outer tube 20 to the inner tube 10 through the hollow channel 40, causing the gas in the inner tube 10 to heat up.

[0060] Specifically, the connecting rib 30 can connect the outer side of the inner tube 10 and the inner side of the outer tube 20 along the axial direction of the air guide tube 100, the length of the hollow channel 40 can be consistent with the length of the connecting rib 30, and the length of the connecting rib 30 can be consistent with the axial length of the air guide tube 100. The gas in the hollow channel 40 and the gas in the inner tube 10 can be of the same type or different types.

[0061] See also Fig. 9 In some embodiments, one axial end of the inner tube 10 is retracted into the outer tube 20 .

[0062] In this way, it is convenient to pass the gas into the hollow channel 40 and the inner tube 10 at the same time, so as to avoid the small amount of gas in the hollow channel 40 causing the heat to be transferred to the inner tube 10 and causing the temperature of the gas in the inner tube 10 to rise.

[0063] Specifically, one end of the inner tube 10 may be retracted into the outer tube 20 , and the other end of the inner tube 10 may be flush with or extend out of the outer tube 20 , or both ends of the inner tube 10 may be retracted into the outer tube 20 .

[0064] See also Figure 4 In some embodiments, along the radial direction of the airway tube 100 , the width L of the hollow channel 40 is greater than or equal to 2 mm.

[0065] In this way, the distance over which heat is transferred from the outer tube 20 to the inner tube 10 can be increased, and the heat insulation area of ​​the hollow channel 40 can be increased, thereby improving the heat insulation efficiency of the hollow channel 40 and reducing the temperature rise of the gas in the inner tube 10.

[0066] Specifically, the width L of the hollow channel 40 may be the width of the connecting rib 30, or the difference between the outer radius of the inner tube 10 and the inner radius of the outer tube 20. The width L of the hollow channel 40 may be 2 mm, 2.2 mm, 2.4 mm, 2.6 mm, 2.8 mm, 3 mm, etc. For example, when the outer radius of the inner tube 10 is 5 mm, the inner radius of the outer tube 20 may be 7 mm, 7.2 mm, 7.4 mm, 7.6 mm, 7.8 mm, 8 mm, etc. Along the axial direction of the air guide tube 100, the width L of the hollow channel 40 may be the same or different.

[0067] See also Figure 4 and Figure 5 In some embodiments, the plurality of connecting ribs 30 separate the hollow channel 40 into a plurality of sub-channels 42 , and the plurality of sub-channels 42 are distributed along the circumference of the inner tube 10 and separated from each other.

[0068] In this way, the plurality of connecting ribs 30 make the shape of the hollow channel 40 stable and not easily deformed, so as to facilitate the smooth flow of gas in the hollow channel 40 , thereby improving the heat insulation effect of the hollow channel 40 .

[0069] Specifically, the subchannel 42 is a space enclosed by the inner tube 10, the outer tube 20 and two adjacent connecting ribs 30. The number of the subchannels 42 may be the same as the number of the connecting ribs 30. For example, when the number of the connecting ribs 30 is three, the number of the subchannels 42 is three; when the number of the connecting ribs 30 is four, the number of the subchannels 42 is four. When the four connecting ribs 30 are evenly spaced and distributed along the circumference of the inner tube 10, the four subchannels 42 are of the same size.

[0070] See also Fig.10 The fan assembly 1000 of the embodiment of the present application includes an air guide tube 100 and a fan 200 , and the fan 200 is used to deliver gas into the hollow channel 40 and the inner tube 10 .

[0071] In this way, the fan 200 can drive the gas into the air duct 100, and transport the gas to the electrical components through the air duct 100 to cool the electrical components.

[0072] Specifically, the fan 200 may be located at one end of the inner tube 10 retracted into the outer tube 20, and the fan 200 may be fixedly connected to the air duct 100 by fasteners. When the fan 200 is started, a large amount of air with a relatively low temperature may be drawn from the outside and discharged into the hollow channel 40 of the air duct 100 and the inner tube 10, and the gas in the inner tube 10 may be transported along the inner tube 10 to the electrical components to cool the electrical components, and the gas in the hollow channel 40 may absorb the heat of the environment outside the outer tube 20 and take the heat away.

[0073] See also Fig. 9 and Fig.10 In some embodiments, the fan 200 is at least partially disposed in the outer tube 20 .

[0074] In this way, the fan 200 can deliver gas into the hollow channel 40 and make the gas flow out of the hollow channel 40 to take away the heat of the environment outside the outer tube 20.

[0075] Specifically, the fan 200 may be partially or completely disposed in the outer tube 20. The size of the air outlet of the fan 200 may be consistent with the inner diameter of the outer tube 20, may be smaller than the inner diameter of the outer tube 20, or may be larger than the inner diameter of the outer tube 20.

[0076] See also Fig. 9 and Fig.11 In some embodiments, the fan assembly 1000 further includes an air outlet pipe 300, one end of the air outlet pipe 300 is inserted into the inner tube 10, and the other end of the air outlet pipe 300 faces the electrical components.

[0077] In this way, one end of the air outlet pipe 300 is inserted into the inner tube 10, which can prevent the gas in the hollow channel 40 from mixing with the gas in the inner tube 10, thereby reducing the heat in the hollow channel 40 that causes the temperature rise of the gas in the inner tube 10; the other end of the air outlet pipe 300 faces the electrical components, so that the gas in the inner tube 10 can flow out from the air outlet pipe 300 to cool the electrical components.

[0078] Specifically, the outlet pipe 300 and the inner tube 10 may be integrally formed, or may be connected by welding, gluing or mechanical connection. The material of the outlet pipe 300 may be the same as or different from that of the inner tube 10. The outer diameter of the outlet pipe 300 may be smaller than the inner diameter of the inner tube 10, so that the outlet pipe 300 may be inserted into the inner tube 10. The outlet pipe 300 may be connected to electrical components, so that the gas may cool the electrical components at a close distance, thereby improving the cooling effect.

[0079] The cooking appliance 2000 according to the embodiment of the present application includes a fan assembly 1000 .

[0080] In this way, the fan assembly 1000 can cool down the interior of the cooking appliance 2000, prevent the electrical components in the cooking appliance 2000 from malfunctioning due to high temperature, and increase the service life of the cooking appliance 2000.

[0081] Specifically, the fan assembly 1000 can be installed inside the cooking appliance 2000 or at the rear side of the cooking appliance 2000. For example, the air duct 100 is installed inside the cooking appliance 2000, and the fan 200 is installed at the rear side of the cooking appliance 2000, and the air duct 100 transports gas to various electrical components inside the cooking appliance 2000.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples 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 any one or more embodiments or examples in a suitable manner.

[0083] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air duct for a cooking appliance, characterized in that: The airway tube comprises: an inner tube for conveying gas to electrical components of the cooking appliance; an outer tube, the outer tube being sleeved outside the inner tube, and a hollow passage being formed between the outer tube and the inner tube; and A plurality of connecting ribs are provided, wherein the connecting ribs connect the outer tube and the inner tube, and the plurality of connecting ribs are spaced apart along the circumference of the inner tube.

2. The airway tube according to claim 1, characterized in that: The hollow channel is filled with a heat insulating medium.

3. The airway tube according to claim 2, characterized in that: The hollow channel is a closed cavity, and the connecting ribs close the two ends of the hollow channel along the axial direction of the air guide tube.

4. The airway tube according to claim 1, characterized in that: The hollow channel penetrates the end surface of the air guide tube along the axial direction of the air guide tube, and the hollow channel is used for introducing gas.

5. The airway tube according to claim 4, characterized in that: One axial end of the inner tube is retracted into the outer tube.

6. The airway tube according to claim 1, characterized in that: Along the radial direction of the air guide tube, the width of the hollow channel is greater than or equal to 2 mm.

7. The airway tube according to claim 1, characterized in that: The plurality of connecting ribs partition the hollow channel into a plurality of sub-channels, and the plurality of sub-channels are distributed along the circumference of the inner tube and are separated from each other.

8. A fan assembly, characterized in that: include: The airway tube according to any one of claims 1 to 7; and A fan is used to send gas into the hollow channel and the inner tube.

9. The fan assembly according to claim 8, characterized in that: The fan is at least partially disposed in the outer tube.

10. The fan assembly according to claim 8, characterized in that: The fan assembly further comprises an air outlet pipe, one end of which is inserted into the inner pipe, and the other end of which faces the electrical component.

11. A cooking appliance, characterized in that: The invention comprises the fan assembly as described in any one of claims 8 to 10.

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