Air duct structure and steaming oven

Abstract

The utility model relates to an air duct structure and a steaming oven, the air duct structure comprises a shell, a fan and a temperature controller, the shell is provided with a mounting cavity, an air inlet channel and an air outlet channel, and the air inlet channel and the air outlet channel are respectively communicated with the mounting cavity; the fan is arranged in the mounting cavity and is used for driving gas in the mounting cavity to flow from the air inlet channel to the air outlet channel along a preset direction; the temperature controller is arranged on the shell and located on the outer side of the mounting cavity, and the distance between the temperature controller and the air inlet channel is larger than the distance between the air outlet channel and the air inlet channel in the preset direction. When the fan is in a normal working state, steam in the mounting cavity cannot flow to the temperature controller, and the temperature controller cannot sense the high-temperature steam; and when the temperature controller senses the high-temperature steam, abnormal conditions such as stalling of the fan are judged, and the cooking device is controlled to stop working in time, so that stalling protection of the fan can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking appliances, in particular to an air duct structure and a steam oven. Background Art

[0002] Since humidity control will affect the cooking effect of the steam oven, an air duct structure is usually provided in the steam oven. When the fan of the air duct structure is working, the steam in the inner tank of the steam oven can be discharged to achieve a dehumidification function.

[0003] However, when the fan is blocked or in other abnormal situations, if the steam oven continues to work, the steam in the inner pot cannot be discharged in time, which will not only affect the cooking effect of the steam oven, but also cause the air pressure in the inner pot to increase, posing a safety hazard. Utility Model Content

[0004] Based on this, it is necessary to provide an air duct structure and a steam oven to address the above problems, so as to achieve fan stall protection.

[0005] The utility model first provides an air duct structure, comprising: a shell, provided with an installation cavity and an air inlet channel and an air outlet channel respectively connected to the installation cavity; a fan, arranged in the installation cavity, and used to drive the gas in the installation cavity to flow from the air inlet channel to the air outlet channel along a preset direction; and a thermostat, arranged in the shell and located on the outside of the installation cavity, along the preset direction, the distance between the thermostat and the air inlet channel is greater than the distance between the air outlet channel and the air inlet channel.

[0006] In the above-mentioned air duct structure, the fan can form a negative pressure at the air inlet channel under normal working conditions, and the steam enters the installation cavity through the air inlet channel and flows in a preset direction. When the steam in the installation cavity flows to the air outlet channel, it is discharged from the installation cavity from the air outlet channel, so that the steam in the installation cavity will not flow to the thermostat, and the thermostat will not sense the high-temperature steam, so as to ensure that the fan and the steam oven can work normally; when the fan is blocked or other abnormal conditions occur, the steam enters the installation cavity through the air inlet channel, and will flow in any direction in the installation cavity, so that it can be sensed by the thermostat. Therefore, when the thermostat senses the high-temperature steam, it is judged that the fan is blocked or other abnormal conditions occur, and the cooking device is promptly controlled to stop working to avoid affecting the cooking effect or causing the air pressure to increase, thereby achieving the fan blocking protection.

[0007] In one of the embodiments, along the circumference of the fan, the air outlet channel and the temperature controller are respectively located on both sides of the air inlet channel.

[0008] With such an arrangement, along a preset direction, the distance between the thermostat and the air inlet channel is much greater than the distance between the air outlet channel and the air inlet channel, thereby preventing the thermostat from misdetecting.

[0009] In one of the embodiments, the air duct structure further includes an adjustment component disposed in the air inlet channel, and the adjustment component is used to adjust the opening size of the air inlet channel.

[0010] With such a configuration, the dehumidification rate of the steam in the inner pot through the air duct structure can be adjusted according to actual cooking needs, thereby improving the cooking effect of the steam oven.

[0011] In one of the embodiments, the adjustment assembly includes a wind shield, which is disposed on an inner wall of the air inlet channel and is rotatable relative to the inner wall of the air inlet channel.

[0012] With such arrangement, the structure of the wind shield is simple, so that the opening size of the air inlet channel can be adjusted easily.

[0013] In one of the embodiments, the adjustment component further includes a torsion spring, and two torsion arms of the torsion spring are respectively connected to the wind shield and the inner wall of the air inlet channel.

[0014] Such an arrangement enables the wind shield to rotate accordingly with changes in the fan speed, thereby ensuring the consistency of adjustment of the fan and the regulating assembly, and does not require the provision of additional drive elements, thereby reducing the number of parts and occupied space, and reducing costs.

[0015] In one of the embodiments, the size of the wind shield is smaller than the cross-sectional size of the air inlet channel; and / or, the wind shield is configured as an arched structure or a semicircular structure.

[0016] With this arrangement, even if the fan is turned off, the steam in the inner tank can always be discharged through the air inlet channel, avoiding accidents caused by excessive air pressure inside the inner tank.

[0017] In one of the embodiments, the fan includes a drive motor and fan blades connected to an output end of the drive motor, and the drive motor is used to drive the fan blades to rotate along the preset direction.

[0018] With such arrangement, the structure of the fan is simple, and it is easy to produce and assemble.

[0019] In one of the embodiments, the shell includes an air guide member and a mounting member, and the air guide member and the mounting member surround and form the mounting cavity and the air outlet channel that are interconnected.

[0020] With such arrangement, the structure of the shell is simple, which is convenient for production and assembly; and when the steam flows in the installation cavity and the air outlet channel, it can take away the heat around the shell, thereby preventing the temperature around the shell from being too high.

[0021] The utility model also provides a steam oven, comprising: an inner pot, provided with an exhaust port; and the air duct structure as described above, arranged outside the inner pot, the air inlet channel being connected with the exhaust port.

[0022] With such arrangement, the steam inside the inner pot can be discharged from the steam oven through the exhaust port, the air inlet channel, the installation cavity and the air outlet channel in sequence, so as to ensure the normal operation of the steam oven.

[0023] In one of the embodiments, the steam oven further includes an exhaust pipe, both ends of which are respectively connected to the air inlet channel and the exhaust port; and / or the air duct structure is arranged on the top wall of the inner pot.

[0024] With such an arrangement, the exhaust pipe can be conveniently connected to the exhaust port and the air inlet channel; the air duct structure arranged on the top wall of the inner pot can fully utilize the existing space in the steam oven, and the steam in the air duct structure can also take away the heat above the inner pot, thereby reducing the temperature rise of the space above the inner pot. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a steam oven according to one embodiment of the utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the middle wind channel from a top-down perspective;

[0028] Figure 3 for Figure 2 A schematic diagram of a partial three-dimensional structure of the middle shell;

[0029] Figure 4 for Figure 2 A schematic diagram of a partial three-dimensional structure of an air duct structure, wherein the regulating component is in a closed state;

[0030] Figure 5 for Figure 2 A schematic diagram of a partial three-dimensional structure of an air duct structure, wherein the regulating component is in an open state.

[0031] Figure numerals: 1. Shell; 11. Installation cavity; 12. Air inlet channel; 13. Air outlet channel; 14. Air guide member; 15. Installation member; 16. Bracket; 2. Fan; 21. Drive motor; 22. Fan blades; 3. Temperature controller; 4. Adjustment assembly; 41. Wind shield; 42. Torsion spring; 43. Rotating shaft; 5. Inner tank; 51. Exhaust port; 6. Exhaust pipe. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0034] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0037] Since humidity control affects the cooking effect of cooking appliances such as steam ovens, steam ovens are usually equipped with an air duct structure. When the fan of the air duct structure is working, it can discharge the steam in the inner pot of the steam oven to achieve the dehumidification function. However, when the fan is blocked or other abnormal conditions occur, if the steam oven continues to work, the steam in the inner pot cannot be discharged in time, which will not only affect the cooking effect of the steam oven, but also increase the air pressure in the inner pot, posing a safety hazard.

[0038] In order to solve the above problems, Figures 1 to 5 As shown, the utility model first provides an air duct structure to achieve stall protection of the fan.

[0039] like Figure 1 As shown, the air duct structure can be used in cooking appliances such as steam ovens, steam boxes, ovens, microwave ovens, etc., to discharge the steam in the cooking appliance through the air duct structure to achieve the dehumidification function of the cooking appliance. For ease of description, the following description is taken as an example of a steam oven.

[0040] like Figures 2 to 3 As shown, specifically, the air duct structure includes a shell 1, a fan 2 and a thermostat 3, wherein: the shell 1 is provided with an installation cavity 11 and an air inlet channel 12 and an air outlet channel 13 respectively connected to the installation cavity 11; the fan 2 is arranged in the installation cavity 11, and is used to drive the gas in the installation cavity 11 to flow from the air inlet channel 12 to the air outlet channel 13 along a preset direction a; the thermostat 3 is arranged in the shell 1 and is located on the outside of the installation cavity 11, and along the preset direction a, the distance between the thermostat 3 and the air inlet channel 12 is greater than the distance between the air outlet channel 13 and the air inlet channel 12.

[0041] In the air duct structure provided by the embodiment of the utility model, the fan 2 can form a negative pressure at the air inlet channel 12 under normal working conditions, and the steam in the inner pot 5 of the steam oven enters the installation cavity 11 through the air inlet channel 12 and flows along the preset direction a. When the steam in the installation cavity 11 flows to the air outlet channel 13, it is discharged from the installation cavity 11 from the air outlet channel 13. Since the distance between the thermostat 3 and the air inlet channel 12 is greater than the distance between the air outlet channel 13 and the air inlet channel 12, the steam in the installation cavity 11 will not flow to the thermostat 3, and the thermostat 3 will not sense the high-temperature steam, so as to prevent the steam from flowing to the thermostat 3. Ensure that the fan 2 and the steam oven can work normally; when the fan 2 is blocked or other abnormal conditions occur, the steam in the inner pot 5 of the steam oven enters the installation cavity 11 through the air inlet channel 12, and will flow in any direction in the installation cavity 11, so that it can be sensed by the thermostat 3. Therefore, when the thermostat 3 senses high-temperature steam, it is determined that the fan 2 has been blocked or other abnormal conditions, and the steam oven is controlled to stop working in time to avoid the steam in the inner pot 5 from being unable to be discharged in time and affecting the cooking effect or causing the air pressure in the inner pot 5 to increase, thereby achieving blockage protection of the fan 2 and improving the safety of the steam oven.

[0042] Among them, the protection temperature of the thermostat 3 is generally 85°C to 90°C. That is to say, the thermostat 3 can detect the ambient temperature, and when the ambient temperature is higher than 85°C to 90°C, it is determined that the thermostat 3 senses high-temperature steam. Of course, the protection temperature of the thermostat 3 can also be adjusted according to the different usage requirements of different cooking utensils, and the embodiment of the utility model does not make specific restrictions here.

[0043] like Figures 2 to 3 As shown, along the circumference of the fan 2, the air outlet channel 13 and the thermostat 3 are respectively located on both sides of the air inlet channel 12. That is, along the preset direction a, the distance between the thermostat 3 and the air inlet channel 12 is much greater than the distance between the air outlet channel 13 and the air inlet channel 12, so that in the opposite direction of the preset direction a, the thermostat 3 is close to the air inlet channel 12. When the fan 2 is in normal working state, when a small amount of steam in the installation cavity 11 does not discharge the installation cavity 11 from the air outlet channel 13, but continues to flow along the preset direction a, the temperature of the steam will gradually decrease. When the steam flows to the thermostat 3, the temperature of the steam is already lower than 85°C to 90°C, and will not be sensed by the thermostat 3, thereby preventing the thermostat 3 from misdetecting and further ensuring that the fan 2 and the steam oven can work normally.

[0044] like Figure 2As shown, the steam oven usually has different requirements for the humidity in the inner pot 5 when working in different modes or cooking different ingredients. For example, in the steaming mode, the inner pot 5 needs high humidity, so it is necessary to control the air duct structure to work at a low dehumidification rate; in the baking mode, the inner pot 5 needs low humidity, so it is necessary to control the air duct structure to work at a high dehumidification rate. Therefore, the air duct structure also includes an adjustment component 4 arranged in the air inlet channel 12, and the adjustment component 4 is used to adjust the opening size of the air inlet channel 12. When the air duct structure needs to work at a low dehumidification rate, the fan 2 is controlled to work at a low speed, and the adjustment component 4 is controlled to reduce the opening of the air inlet channel 12, so that the steam in the inner pot 5 is slowly discharged through the air duct structure, and the inner pot 5 can be quickly heated; when the air duct structure needs to work at a high dehumidification rate, the fan 2 is controlled to work at a high speed, and the adjustment component 4 is controlled to increase the opening of the air inlet channel 12, so that the steam in the inner pot 5 is quickly discharged through the air duct structure. With such an arrangement, the dehumidification rate of the steam in the inner pot 5 through the air duct structure can be adjusted according to actual cooking needs, thereby improving the cooking effect of the steam oven.

[0045] like Figures 4 to 5 As shown, in one embodiment, the adjustment component 4 includes a windshield 41, which is arranged on the inner wall of the air inlet channel 12 and can rotate relative to the inner wall of the air inlet channel 12. When the windshield 41 rotates to a state perpendicular to the axis of the air inlet channel 12, the opening of the air inlet channel 12 is the smallest, or even in a closed state; when the windshield 41 rotates to a state parallel to the axis of the air inlet channel 12, the opening of the air inlet channel 12 is the largest. The windshield 41 has a simple structure, so as to facilitate the adjustment of the opening size of the air inlet channel 12.

[0046] Of course, in other embodiments, the adjustment component 4 can also be set as a wax motor, an air valve, a flow control valve or other components, as long as the opening size of the air inlet channel 12 can be adjusted. The embodiment of the utility model does not make specific restrictions here.

[0047] like Figures 4 to 5As shown, in one embodiment, the adjustment component 4 also includes a torsion spring 42, and the two torsion arms of the torsion spring 42 are respectively connected to the wind shield 41 and the inner wall of the air inlet channel 12. When the wind shield 41 rotates to a state perpendicular to the axis of the air inlet channel 12, the torsion spring 42 is in an undeformed state. When the speed of the fan 2 is low, the wind pressure in the air inlet channel 12 is small. Due to the torsion of the torsion spring 42, the wind shield 41 cannot rotate relative to the inner wall of the air inlet channel 12, so that the opening of the air inlet channel 12 remains in a small state. When the speed of the fan 2 increases, the wind pressure in the air inlet channel 12 gradually increases. When the wind pressure in the air inlet channel 12 is greater than the torsion of the torsion spring 42, the wind shield 41 rotates in the direction b shown in the figure under the action of the wind pressure. When the wind shield 41 rotates to a state not perpendicular to the axis of the air inlet channel 12, the torsion spring 42 is twisted, and the opening of the air inlet channel 12 gradually increases. When the speed of the fan 2 decreases, the wind pressure in the air inlet passage 12 gradually decreases. When the wind pressure in the air inlet passage 12 is less than the torsion of the torsion spring 42, the wind shield 41 rotates in the opposite direction and resets under the action of the torsion of the torsion spring 42, and the opening of the air inlet passage 12 gradually decreases. In this way, the wind shield 41 can rotate correspondingly with the change of the speed of the fan 2, ensuring the consistency of the adjustment of the fan 2 and the adjustment component 4, and no additional driving components are required, thereby reducing the number of parts and the occupied space, and reducing costs.

[0048] Furthermore, the adjustment component 4 also includes a rotating shaft 43 rotatably arranged on the inner wall of the air inlet channel 12, the wind shield 41 is connected to the rotating shaft 43, and the torsion spring 42 is sleeved on the rotating shaft 43 to ensure the deformation direction of the torsion spring 42, thereby ensuring the overall reliability of the adjustment component 4.

[0049] Of course, in other embodiments, the adjustment assembly 4 may also include a driving element capable of driving the wind shield 41 to rotate relative to the inner wall of the air inlet channel 12, such as a motor.

[0050] like Figures 4 to 5 As shown, in one embodiment, the size of the windshield 41 is smaller than the cross-sectional size of the air inlet channel 12. When the windshield 41 rotates to a state perpendicular to the axis of the air inlet channel 12, there is a gap between the inner wall of the air inlet channel 12 and at least part of the edge of the windshield 41, that is, the air inlet channel 12 is still in an open state. This ensures that even if the fan 2 is in a closed state, the steam in the inner tank 5 can always be discharged through the air inlet channel 12, avoiding accidents caused by excessive air pressure inside the inner tank 5.

[0051] The windshield 41 can be configured as an arched structure, a semicircular structure, or a fan-shaped structure that matches the shape of the air inlet channel 12, so as to facilitate production and processing. Alternatively, the windshield 41 can also be configured as a structure of other regular or irregular shapes such as a rectangle or a triangle, as long as it can block at least part of the opening of the air inlet channel 12, and the embodiment of the utility model is not specifically limited here.

[0052] Of course, in other embodiments, the shape of the wind shield 41 may be the same as the cross-sectional shape of the air inlet channel 12, and the size of the wind shield 41 may be equal to or slightly smaller than the cross-sectional size of the air inlet channel 12. In this way, when the wind shield 41 rotates to a state perpendicular to the axis of the air inlet channel 12, the air inlet channel 12 is in a closed state.

[0053] like Figure 2 As shown, the fan 2 includes a driving motor 21 and a fan blade 22 connected to the output end of the driving motor 21. The driving motor 21 is used to drive the fan blade 22 to rotate along a preset direction a. When the fan blade 22 rotates along the preset direction a, it can drive the gas in the installation cavity 11 to flow along the preset direction a. The fan 2 has a simple structure, which is convenient for production and assembly.

[0054] like Figure 2 As shown, in one embodiment, the housing 1 includes an air guide 14 and a mounting member 15, and the air guide 14 and the mounting member 15 are arranged to form a mounting cavity 11 and an air outlet channel 13 that are connected to each other. The mounting member 15 is arranged on the outer wall of the inner pot 5 and is used to fix other components. The air guide 14 is arranged on the side of the mounting member 15 away from the inner pot 5, and the end of the air outlet channel 13 away from the mounting cavity 11 can be connected to the outside to discharge the steam out of the steam oven. The structure of the housing 1 is simple, which is convenient for production and assembly. In addition, when the steam circulates in the mounting cavity 11 and the air outlet channel 13, it can also take away the heat around the housing 1, thereby preventing the temperature around the housing 1 from being too high.

[0055] Furthermore, the housing 1 further comprises a bracket 16, which is detachably arranged on the air guide 14, and is used to fix and support the fan 2 and the thermostat 3, and an air inlet channel 12 is arranged on the bracket 16. The bracket 16 is detachably arranged to facilitate installation or maintenance of components such as the fan 2 and the thermostat 3.

[0056] Of course, in other embodiments, the fan 2 and the thermostat 3 may also be arranged on the air guide 14, and the air inlet channel 12 may also be opened on the air guide 14; and the air guide 14 may also be surrounded by the outer wall of the inner tank 5 to form an installation cavity 11 and an air outlet channel 13 that are interconnected, or an installation cavity 11 and an air outlet channel 13 that are interconnected may be opened on the air guide 14. The specific formation method of the air inlet channel 12, the installation cavity 11 and the air outlet channel 13 can be adjusted according to the structure of the steam oven, and the embodiment of the utility model does not make specific restrictions here.

[0057] like Figure 1 As shown, the embodiment of the utility model further provides a steam oven, comprising an inner container 5 and the above-mentioned air duct structure, wherein: the inner container 5 is provided with an exhaust port 51; the air duct structure is arranged outside the inner container 5, and the air inlet channel 12 is connected with the exhaust port 51. The steam inside the inner container 5 can be discharged from the steam oven through the exhaust port 51, the air inlet channel 12, the installation cavity 11 and the air outlet channel 13 in sequence to ensure the normal operation of the steam oven.

[0058] like Figure 1 As shown, in one embodiment, the air duct structure is arranged on the top wall of the inner container 5, the exhaust port 51 is opened on the rear wall of the inner container 5, and the steam oven further comprises an exhaust pipe 6, and the two ends of the exhaust pipe 6 are respectively connected to the air inlet channel 12 and the exhaust port 51. Since other structures need to be installed above the inner container 5, there is a large installation space, so the air duct structure is arranged on the top wall of the inner container 5, which can make full use of the existing space in the steam oven and avoid increasing the overall volume of the steam oven. At the same time, the steam in the air duct structure can also take away the heat above the inner container 5, reduce the temperature rise of the space above the inner container 5, and avoid the temperature being too high to affect the normal operation of other components inside the steam oven. The exhaust pipe 6 can be conveniently connected to the exhaust port 51 and the air inlet channel 12.

[0059] Of course, in other embodiments, the air duct structure can also be arranged at other positions such as the rear wall or side wall of the inner pot 5, as long as the steam in the inner pot 5 can be discharged and the normal operation of the steam-bake machine will not be affected. The embodiment of the utility model does not make specific restrictions here. In addition, when the air duct structure and the exhaust port 51 are arranged on the same wall of the inner pot 5, and the exhaust port 51 is arranged correspondingly to the air inlet channel 12, the exhaust port 51 and the air inlet channel 12 can also be directly connected, that is, the exhaust pipe 6 structure is omitted.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An air duct structure, characterized in that: include: A housing (1) is provided with a mounting cavity (11) and an air inlet channel (12) and an air outlet channel (13) respectively connected to the mounting cavity (11); a fan (2) disposed in the installation cavity (11) and used for driving the gas in the installation cavity (11) to flow from the air inlet channel (12) to the air outlet channel (13) along a preset direction; and The thermostat (3) is arranged on the housing (1) and is located outside the installation cavity (11); along the preset direction, the distance between the thermostat (3) and the air inlet channel (12) is greater than the distance between the air outlet channel (13) and the air inlet channel (12).

2. The air duct structure according to claim 1, characterized in that: Along the circumference of the fan (2), the air outlet channel (13) and the temperature controller (3) are respectively located on both sides of the air inlet channel (12).

3. The air duct structure according to claim 1, characterized in that: The air duct structure further comprises an adjustment component (4) arranged in the air inlet channel (12), wherein the adjustment component (4) is used to adjust the opening size of the air inlet channel (12).

4. The air duct structure according to claim 3, characterized in that: The adjustment component (4) comprises a wind shield (41), wherein the wind shield (41) is arranged on the inner wall of the air inlet channel (12) and is capable of rotating relative to the inner wall of the air inlet channel (12).

5. The air duct structure according to claim 4, characterized in that: The adjustment component (4) further comprises a torsion spring (42), wherein two torsion arms of the torsion spring (42) are respectively connected to the wind shield plate (41) and the inner wall of the air inlet channel (12).

6. The air duct structure according to claim 4, characterized in that: The size of the wind shield (41) is smaller than the cross-sectional size of the air inlet channel (12); and / or, The wind shield (41) is configured as an arched structure or a semicircular structure.

7. The air duct structure according to claim 1, characterized in that: The fan (2) comprises a drive motor (21) and a fan blade (22) connected to an output end of the drive motor (21), wherein the drive motor (21) is used to drive the fan blade (22) to rotate along the preset direction.

8. The air duct structure according to claim 1, characterized in that: The housing (1) comprises an air guide member (14) and a mounting member (15), wherein the air guide member (14) and the mounting member (15) surround and form the mounting cavity (11) and the air outlet channel (13) which are in communication with each other.

9. A steam oven, characterized in that: include: The inner container (5) is provided with an exhaust port (51); as well as, The air duct structure according to any one of claims 1 to 8 is arranged outside the inner liner (5), and the air inlet channel (12) is connected to the exhaust port (51).

10. The steam oven according to claim 9, characterized in that: The steam oven further comprises an exhaust pipe (6), two ends of the exhaust pipe (6) being respectively connected to the air inlet channel (12) and the exhaust port (51); and / or, The air duct structure is arranged on the top wall of the inner container (5).

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