Hot air structure and cooking equipment

Abstract

The present invention discloses a hot air structure and cooking equipment, wherein the hot air structure includes a shell, a plurality of heating tubes and a wind wheel, the shell is provided with a wind cavity and a plurality of air outlets connected to the wind cavity; a plurality of heating tubes are arranged in the wind cavity, the heating tube has an air inlet end and an air outlet end, the air inlet end is connected to the wind cavity, and the air outlet end is connected to the air outlet; the wind wheel is used to drive air from the air inlet end into the heating tube and out from the air outlet end. The technical solution of the present invention utilizes a wind wheel to quickly pass air into a plurality of hollow heating tubes, each heating tube both heats and guides the air, and finally the hot air is uniformly and quickly sprayed onto the food through the heating tube, so as to achieve uniform and rapid heating of the food. At the same time, the solution has a simple structure and can greatly reduce costs.

Description

Technical Field

[0001] The invention relates to the technical field of cooking, and in particular to a hot air structure and cooking equipment. Background Art

[0002] Multifunctional cooking equipment is the development direction of cooking equipment in the future, such as a steam-bake all-in-one machine with both steaming and baking functions, a steam-bake micro-in-one machine with steaming, baking and microwave functions, etc. In the related art, a hot air structure is often set in the heating chamber of the cooking equipment, and the hot air blown out by the hot air structure is used to heat the food. However, in the related art, the hot air structure mostly uses a wind wheel to drive the hot air in the hot air chamber to blow out from the openings on the mesh plate onto the food. Since the mesh plate has a large flow resistance to the hot air, the flow velocity of the hot air is greatly attenuated, resulting in a small flow velocity of the hot air blown onto the food, and a poor heating effect.

[0003] The above contents are only used to assist in understanding the technical solution of the invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a hot air structure, aiming to solve the technical problem of poor heating effect of the hot air structure in the prior art.

[0005] To achieve the above object, the present invention provides a hot air structure, comprising:

[0006] A shell, wherein the shell is provided with an air cavity and a plurality of air outlets connected to the air cavity;

[0007] A plurality of heating tubes are disposed in the air cavity, each of the heating tubes having an air inlet end and an air outlet end, the air inlet end is connected to the air cavity, and the air outlet end is connected to the air outlet; and

[0008] The wind wheel is used to drive air to enter the heating tube from the air inlet end and flow out from the air outlet end.

[0009] In one embodiment, it further includes:

[0010] A partition is arranged in the wind cavity and divides the wind cavity into a first sub-cavity and a second sub-cavity. The wind wheel is arranged in the first sub-cavity, and the plurality of heating tubes are arranged in the second sub-cavity. The partition is provided with a plurality of through holes, and each of the through holes connects the air inlet end of a corresponding heating tube with the first sub-cavity.

[0011] In one embodiment, the hot air structure includes a first elastic member and / or a second elastic member, the first elastic member is clamped between the outer wall of the heating tube and the inner wall of the air outlet, and the second elastic member is clamped between the outer wall of the heating tube and the inner wall of the perforation.

[0012] In one embodiment, the heating tube includes a tube body, a resistance heating layer arranged on the outer surface of the tube body, and electrode rings arranged on the upper and lower parts of the resistance heating layer, and the tube body has the air inlet end and the air outlet end.

[0013] In one embodiment, the plurality of heating tubes are arranged in an array, or the plurality of heating tubes are arranged in multiple rows, and the heating tubes in two adjacent rows are staggered.

[0014] In one embodiment, the wind wheel is an axial flow wind wheel, and the heating tube extends along the axial direction of the axial flow wind wheel.

[0015] In one embodiment, the shell includes a substrate and a shell cover, the shell cover and the substrate together enclose the air cavity, an air inlet is provided on the top of the shell cover, and the air outlet is provided on the substrate.

[0016] In one embodiment, the shell cover includes a top plate opposite to the base plate, and a receiving groove is provided on the surface of the top plate facing away from the base plate. The hot air structure also includes a driving motor, which is installed in the receiving groove, and the motor shaft of the driving motor extends into the wind cavity and is connected to the wind wheel to drive the wind wheel to rotate.

[0017] In one embodiment, the air inlet is disposed on the top plate, and the air inlet extends along the circumference of the top plate.

[0018] In one embodiment, there are multiple air inlets, and the multiple air inlets are located at the periphery of the accommodating groove.

[0019] In one embodiment, the hot air structure further includes a motor bracket, the motor bracket is installed on a side of the top plate facing away from the base plate, and the drive motor is installed on the motor bracket.

[0020] The present invention further provides a cooking device, comprising a hot air structure, wherein the hot air structure comprises:

[0021] A shell, wherein the shell is provided with an air cavity and a plurality of air outlets connected to the air cavity;

[0022] A plurality of heating tubes are disposed in the air cavity, each of the heating tubes having an air inlet end and an air outlet end, the air inlet end is connected to the air cavity, and the air outlet end is connected to the air outlet; and

[0023] The wind wheel is used to drive air to enter the heating tube from the air inlet end and flow out from the air outlet end.

[0024] The hot air structure of the present invention comprises a shell, a plurality of heating tubes and a wind wheel, wherein the shell is provided with a wind cavity and a plurality of air outlets connected with the wind cavity; a plurality of heating tubes are arranged in the wind cavity, and the heating tube has an air inlet end and an air outlet end, wherein the air inlet end is connected with the wind cavity, and the air outlet end is connected with the air outlet; the wind wheel is used to drive air from the air inlet end into the heating tube and out from the air outlet end; in this way, the wind wheel is used to quickly pass air into a plurality of hollow heating tubes, and each heating tube both heats and guides the air, and finally the hot air is uniformly and quickly sprayed onto the food through the heating tube, so as to achieve uniform and rapid heating of the food. At the same time, the structure of the present invention is simple, which can greatly reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of an embodiment of a hot air structure of the present invention;

[0027] Figure 2 for Figure 1 Internal details of the medium hot air structure;

[0028] Figure 3 for Figure 1 Cross-section of the medium hot air structure;

[0029] Figure 4 for Figure 1 Another structural diagram of the medium hot air structure from another perspective;

[0030] Figure 5 for Figure 2 or Figure 3 A schematic structural diagram of an embodiment of a heating tube.

[0031] Description of Figure Numbers:

[0032]

[0033]

[0034] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The present invention provides a cooking device, wherein the cooking device may include an oven with air frying function, a steam oven, a microwave oven, and the like.

[0039] See also Figure 1 In an embodiment of the present invention, the cooking device includes a housing and a hot air structure 100, the housing has a heating cavity, and the hot air device is used to heat food in the heating cavity. Specifically, the hot air device can be arranged at the top, bottom or side of the heating cavity, which is not specifically limited here.

[0040] In one embodiment, in order to further improve the heating effect of the hot air structure 100 on food, the hot air structure 100 can be arranged on the top of the heating chamber, so that the hot air blown out by the hot air device can be sprayed onto the food evenly and at a high speed, thereby achieving uniform and rapid heating of the food.

[0041] The following will take the case where the hot air structure 100 is disposed on the top of the heating chamber as an example for description.

[0042] See also Figures 1 to 4 The hot air structure 100 of the embodiment of the present invention includes a housing 110, a plurality of heating tubes 130 and a wind wheel 140. The housing 110 is provided with a wind cavity 111 and a plurality of air outlets 118 connected to the wind cavity 111; the plurality of heating tubes 130 are arranged in the wind cavity 111, and the heating tubes 130 have an air inlet end 134 and an air outlet end 135, the air inlet end 134 is connected to the wind cavity 111, and the air outlet end 135 is connected to the air outlet 118. The wind wheel 140 is used to drive air from the air inlet end 134 into the heating tube 130 and out from the air outlet end 135.

[0043] In the embodiment of the present invention, the shell 110 of the hot air structure 100 can be an integrated structure. Of course, in order to facilitate disassembly and assembly, the shell 110 can also be a split structure, for example, the shell 110 includes a base plate 112 and a shell cover 113 detachably connected to the base plate 112. An air cavity 111 is formed inside the shell 110, and an air inlet 117 and an air outlet 118 connected to the air cavity 111 are provided on the shell 110, so that after the air enters the air cavity 111 from the air inlet 117, it is blown out from the air outlet 118 after being heated, so as to heat the food in the heating cavity of the cooking device. Among them, the air inlet 117 can be arranged at the top, bottom or peripheral side of the shell 110, and the air outlet 118 can also be arranged at the top, bottom or peripheral side of the shell 110. For example, the air inlet 117 is disposed at the top of the housing 110 , and the air outlet 118 is disposed at the bottom of the housing 110 , so as to facilitate air circulation.

[0044] There is no specific limitation on the number of the air inlets 117. For example, the number of the air inlets 117 may be one, two, three or more. There is no specific limitation on the shape of the air inlet 117. For example, the shape of the air inlet 117 may be circular, elliptical, square, long, arc-shaped or other special shapes. There are multiple air outlets 118, and the multiple air outlets 118 are arranged corresponding to the multiple heating tubes 130. The shape of the air outlet 118 may also be circular, elliptical, square, long, arc-shaped or other special shapes, which is not specifically limited here.

[0045] In the embodiment of the present invention, the heating tube 130 is a hollow structure, the upper end of the heating tube 130 is open as the air inlet end 134, and the lower end of the heating tube 130 is open as the air outlet end 135. A plurality of the heating tubes 130 are arranged in the air cavity 111, the air inlet end 134 of the heating tube 130 is connected to the air cavity 111, and the air outlet end 135 of the heating tube 130 is connected to the air outlet 118, so that the air in the air cavity 111 can enter the heating tube 130 from the air inlet end 134, and be blown out from the air outlet end 135 after being heated. It should be noted that the lower end surface of the heating tube 130 can be flush with the lower surface of the shell 110, or the lower end surface of the heating tube 130 can be slightly higher than the lower surface of the shell 110, or the lower end of the heating tube 130 passes through the air outlet 118, that is, the lower end surface of the heating tube 130 is slightly lower than the lower surface of the shell 110.

[0046] When the heating tube 130 is working, its surface temperature rises, forming convection heat exchange with the air, and finally forming direct-injection hot air at the air outlet 135 of the heating tube 130. Here, the heating tube 130, on the one hand, plays a role in heating the air, so that the wind blown out from the heating tube 130 is hot air, and on the other hand, it can also play a role in guiding the hot air so that the hot air can be blown evenly to various positions of the food, thereby improving the heating uniformity and heating efficiency. Specifically, the heating tube 130 can be a quartz heating tube 130, but is not limited to this. Among them, the quartz heating tube 130 is a far-infrared heating tube 130, which adopts a milky white quartz glass tube processed by a special process and is equipped with a resistive composite material as a heater, and has the advantages of small size and high power.

[0047] In the embodiment of the present invention, a wind wheel 140 is further provided in the wind cavity 111, and the wind wheel 140 is used to drive air from the air inlet end 134 into the heating tube 130 and out from the air outlet end 135. Optionally, the wind wheel 140 is an axial flow wind wheel 140. Without loss of generality, the hot air structure 100 also includes a drive motor 150, and the drive motor 150 is used to drive the wind wheel 140 to rotate. Among them, the drive motor 150 can be arranged in the wind cavity 111, and can also be arranged outside the wind cavity 111. Since the hot air structure 100 of the present invention uses the heating tube 130 to heat the air, the heating tube 130 can also guide the hot air, thereby reducing the resistance of the hot air flow and reducing the attenuation of the hot air flow speed, so that the hot air blown out from the air outlet end 135 of the heating tube 130 is uniformly and quickly sprayed onto the food, thereby achieving uniform and rapid heating of the food.

[0048] The hot air structure 100 of the present invention comprises a housing 110, a plurality of heating tubes 130 and a wind wheel 140. The housing 110 is provided with a wind cavity 111 and a plurality of air outlets 118 connected to the wind cavity 111. The plurality of heating tubes 130 are arranged in the wind cavity 111. The heating tubes 130 have an air inlet end 134 and an air outlet end 135. The air inlet end 134 is connected to the wind cavity 111, and the air outlet end 135 is connected to the air outlet 118. The wind wheel 140 is used to drive air into the heating tubes 130 from the air inlet end 134 and out from the air outlet end 135. In this way, the wind wheel 140 is used to quickly pass air into the plurality of hollow heating tubes 130, and each heating tube 130 heats and guides the air. Finally, the hot air is uniformly and quickly sprayed onto the food through the heating tubes 130, so as to achieve uniform and rapid heating of the food. At the same time, the structure of the present invention is simple, which can greatly reduce the cost.

[0049] See also Figure 2 and Figure 3 In one embodiment, the hot air structure 100 also includes a partition 120, which is arranged in the wind cavity 111 and divides the wind cavity 111 into a first sub-cavity 121 and a second sub-cavity 122. The wind wheel 140 is arranged in the first sub-cavity 121, and the plurality of heating tubes 130 are arranged in the second sub-cavity 122. The partition 120 is provided with a plurality of through holes 123, and each of the through holes 123 connects the air inlet end 134 of a corresponding heating tube 130 with the first sub-cavity 121.

[0050] In this embodiment, the partition 120 is arranged roughly in a circular shape. The partition 120 divides the air cavity 111 into a first sub-cavity 121 and a second sub-cavity 122. The first sub-cavity 121 is located above the second sub-cavity 122. A plurality of through holes 123 are arranged through the partition 120, and a plurality of air outlets 118 are arranged at the bottom of the second sub-cavity 122. The plurality of through holes 123 are arranged in a one-to-one correspondence with the plurality of air outlets 118. A plurality of heating tubes 130 are arranged in the second sub-cavity 122, and the air inlet end 134 of each heating tube 130 is connected to the through hole 123, and the air outlet end 135 of each heating tube 130 is connected to the air outlet 118.

[0051] like Figure 2 and Figure 3As shown, the heating tube 130 extends along the axial direction of the axial flow impeller 140. The upper end surface of the heating tube 130 may be flush with the upper surface of the partition 120, or the lower end surface of the heating tube 130 may be slightly higher than the lower surface of the partition 120, or the upper end of the heating tube 130 passes through the through hole 123, that is, the upper end surface of the heating tube 130 is slightly higher than the upper surface of the partition 120.

[0052] It is worth mentioning that when the heating tube 130 is heated, it can not only heat the air in the heating tube 130, but also heat the air outside the heating tube 130. In this embodiment, the air cavity 111 is divided into a first sub-cavity 121 and a second sub-cavity 122 by setting a partition 120, and the heating tube 130 is installed in the second sub-cavity 122, so that during the heating process, the heating tube 130 can heat the air in the second sub-cavity 122, so that the air temperature in the second sub-cavity 122 will be higher than the air temperature in the first sub-cavity 121, and then the air temperature outside the heating tube 130 will be higher than the air temperature in the heating tube 130, so that the heat generated by the heating tube 130 can be mainly used to heat the air in the heating tube 130, effectively improving the temperature and of the hot air blown out from the air outlet end 135 of the heat exchange tube, and can heat the food more quickly, thereby improving the heating efficiency. Here, the partition 120 can also play a certain role in heat preservation and heat insulation.

[0053] Optionally, in order to improve the thermal insulation effect of the partition 120, a thermal insulation layer may be provided on the surface of the partition 120. The material of the thermal insulation layer may include foam material or glass fiber wool, etc. The foam material may include polystyrene foam material or polyurethane foam material, etc.

[0054] The structure and arrangement of the heating tube 130 will be described in detail below.

[0055] See also Figure 5 In one embodiment, the heating tube 130 includes a tube body 131 and a resistance heating layer 132 arranged on the outer surface of the tube body 131 , and electrode rings 133 arranged on the upper and lower parts of the resistance heating layer 132 .

[0056] The tube body 131 is hollow and has the air inlet end 134 and the air outlet end 135, and the material of the resistance heating layer 132 can be a metal nanocomposite material. Optionally, the metal nanocomposite material is a nanocomposite material containing at least one of iron, tin, silicon, manganese, barium, tungsten and molybdenum. The resistance heating layer 132 can be formed on the outer surface of the tube body 131 by coating, such as spraying or dipping. One of the electrode rings 133 is connected to the positive pole of the power supply device, and the other electrode ring 133 is connected to the negative pole of the power supply device, so that power can be applied to the resistance heating layer 132 through the electrode ring 133, and the resistance heating layer 132 generates heat so that the air in the tube body 131 can be heated.

[0057] There are many ways to arrange the multiple heating tubes 130. For example, the multiple heating tubes 130 are arranged regularly, such as the multiple heating tubes 130 are arranged in an array, or the multiple heating tubes 130 are arranged in multiple rows, and the two adjacent rows of heating tubes 130 are staggered. By arranging the multiple heating tubes 130 regularly, the uniformity of heating the food can be better achieved. Of course, the multiple heating tubes 130 can also be arranged irregularly, which is not specifically limited here.

[0058] In addition, there are also various ways to install the heating tube 130. For example, in one embodiment, the heating tube 130 is detachably installed in the second sub-cavity 122. By detachably installing the heating tube 130 in the second sub-cavity 122, it is convenient to replace and repair the heating tube 130.

[0059] Specifically, the upper end of the heating tube 130 is detachably connected to the partition 120, and the lower end of the heating tube 130 is detachably connected to the housing 110. For example but not limited to, the upper end of the heating tube 130 is inserted into the through hole 123, and the lower end of the heating tube 130 is inserted into the air outlet 118.

[0060] In this embodiment, the hot air structure 100 further includes an elastic member, which includes a first elastic member and / or a second elastic member, wherein the first elastic member is sandwiched between the outer wall of the heating tube 130 and the inner wall of the air outlet 118, and the second elastic member is sandwiched between the outer wall of the heating tube 130 and the inner wall of the through hole 123. By providing the first elastic member and the second elastic member, the heating tube 130 can be more stably installed on the partition 120 and the housing 110. Optionally, the first elastic member and the second elastic member can be elastic gaskets or elastic sleeves, etc.

[0061] It can be understood that in other embodiments, the heating tube 130 can also be fixedly installed in the second sub-cavity 122, without specific limitation.

[0062] In the above embodiments, the number of the air outlets 118 and the perforations 123 may be consistent with the number of the heating tubes 130. Each heating tube 130 is provided with one air outlet 118 and one perforation 123. In this way, all the air in the second sub-cavity 122 enters the heating tube 130 from the air inlet end 134 of the heating tube 130, and is finally blown out from the air outlet end 135 of the heating tube 130. It should be pointed out that the number of the air outlets 118 and the perforations 123 may also be greater than the number of the heating tubes 130. In this way, the installation position of the heating tube 130 can be selected and debugged according to actual use needs to match the uniformity of heating food. Compared with the prior art of matching the uniformity of heating food by adjusting the opening position of the mesh plate, the installation position of the heating tube 130 is selected and debugged in this way, which greatly shortens the debugging cycle and reduces the cost.

[0063] Please see again Figures 1 to 4 In one embodiment, the housing 110 includes a substrate 112 and a shell cover 113 . The shell cover 113 is disposed on the substrate 112 , and the shell cover 113 and the substrate 112 together enclose the air cavity 111 .

[0064] The base plate 112 is generally circular, and of course, the base plate 112 may also be oval, square, trapezoidal or other special shapes. The shell cover 113 is cylindrical with one end open, and may be cylindrical or square, and is not specifically limited. The base plate 112 is disposed at the open end of the shell cover 113, and the base plate 112 may be detachably connected to the shell cover 113, so as to facilitate the installation and removal of the hot air structure 100.

[0065] See also Figure 2 and Figure 3 In this embodiment, the air inlet 117 is provided at the top of the shell cover 113, and the air outlet 118 is provided on the substrate 112. The number of the air inlet 117 may be one, and of course, the number of the air inlet 117 may also be multiple, such as two, three or more. If the number of the air inlet 117 is multiple, the multiple air inlets 117 may be arranged at intervals along the circumference of the shell cover 113. For example, the multiple air inlets 117 are evenly distributed along the circumference of the shell cover 113, so that the uniformity of the air intake can be ensured, and then the air can flow evenly into the heating tube 130, thereby ensuring the uniformity of the heating of the food.

[0066] Furthermore, in this embodiment, the shell cover 113 is cylindrical, and the air inlet 117 extends along the circumference of the shell cover 113, so that the air volume can be further increased.

[0067] See also Figure 2 and Figure 3 In one embodiment, the housing 113 includes a top plate 114 opposite to the base plate 112, and a side plate 116 extending from the edge of the top plate 114 toward the base plate 112. The top plate 114 has a surface facing away from the base plate 112. A receiving groove 115 is provided on the upper surface of the top plate 114. The hot air structure 100 also includes a driving motor 150. The driving motor 150 is installed in the receiving groove 115, and the motor shaft of the driving motor 150 extends into the air cavity 111 and is connected to the wind wheel 140 to drive the wind wheel 140 to rotate.

[0068] Specifically, the top plate 114 is provided with a mounting hole penetrating the accommodating groove 115, and the motor shaft of the driving motor 150 passes through the mounting hole and extends into the first sub-cavity 121 to be connected with the wind wheel 140. By installing the driving motor 150 outside the wind cavity 111, on the one hand, the volume of the wind cavity 111 can be reduced, and no additional space for installing the driving motor 150 is required. On the other hand, the heat dissipation of the driving motor 150 can be accelerated to prevent the driving motor 150 from overheating and malfunctioning.

[0069] In this embodiment, the receiving groove 115 and the air inlet 117 are both disposed on the top plate 114, and the receiving groove 115 is disposed in the middle of the top plate 114, and a plurality of the air inlets 117 are disposed on the periphery of the receiving groove 115. In this way, the housing 113 can be reasonably utilized to install and fix the driving motor 150, and the driving motor 150 will not interfere with the air intake of the hot air structure 100.

[0070] Furthermore, the hot air structure 100 further includes a motor bracket 151, which is mounted on a side of the top plate 114 away from the base plate 112, and the drive motor 150 is mounted on the motor bracket 151. Here, the motor bracket 151 mainly serves to install and fix the drive motor 150.

[0071] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A hot air structure, characterized in that: include: A shell, wherein the shell is provided with an air cavity and a plurality of air outlets connected to the air cavity; A plurality of heating tubes are arranged in the air cavity, the heating tubes having an air inlet end and an air outlet end, the air inlet end is connected to the air cavity, and the air outlet end is connected to the air outlet; as well as A wind wheel, used to drive air from the air inlet end into the heating tube and out from the air outlet end; A partition is arranged in the wind cavity and divides the wind cavity into a first sub-cavity and a second sub-cavity. The wind wheel is arranged in the first sub-cavity, and the plurality of heating tubes are arranged in the second sub-cavity. A plurality of through holes are arranged on the partition, and each of the through holes connects the air inlet end of a corresponding heating tube with the first sub-cavity.

2. The hot air structure according to claim 1, characterized in that: The hot air structure includes a first elastic member and / or a second elastic member, the first elastic member is clamped between the outer wall of the heating tube and the inner wall of the air outlet, and the second elastic member is clamped between the outer wall of the heating tube and the inner wall of the perforation.

3. The hot air structure according to claim 1, characterized in that: The heating tube comprises a tube body, a resistance heating layer arranged on the outer surface of the tube body, and electrode rings arranged on the upper and lower parts of the resistance heating layer. The tube body has the air inlet end and the air outlet end.

4. The hot air structure according to claim 1, characterized in that: The plurality of heating tubes are arranged in an array, or the plurality of heating tubes are arranged in multiple rows, and the heating tubes in two adjacent rows are arranged in a staggered manner.

5. The hot air structure according to claim 1, characterized in that: The wind wheel is an axial flow wind wheel, and the heating tube extends along the axial direction of the axial flow wind wheel.

6. The hot air structure according to any one of claims 1 to 5, characterized in that: The shell includes a base plate and a shell cover. The shell cover and the base plate are together enclosed to form the wind cavity. An air inlet is arranged on the top of the shell cover, and the air outlet is arranged on the base plate.

7. The hot air structure according to claim 6, characterized in that: The shell cover includes a top plate opposite to the base plate, and a receiving groove is provided on the surface of the top plate facing away from the base plate. The hot air structure also includes a driving motor, which is installed in the receiving groove, and the motor shaft of the driving motor extends into the wind cavity and is connected to the wind wheel to drive the wind wheel to rotate.

8. The hot air structure according to claim 7, characterized in that: The air inlet is arranged on the top plate, and the air inlet extends along the circumference of the top plate.

9. The hot air structure according to claim 8, characterized in that: There are multiple air inlets, and the multiple air inlets are located at the periphery of the accommodating groove.

10. The hot air structure according to claim 7, characterized in that: The hot air structure further comprises a motor bracket, wherein the motor bracket is mounted on a side of the top plate facing away from the base plate, and the driving motor is mounted on the motor bracket.

11. A cooking device, characterized in that: It comprises the hot air structure as claimed in any one of claims 1 to 10.

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