Hot air structure and steam-baking micro-cooking machine

Abstract

The application relates to a hot air structure and a steam-baking micro-cooking machine, which can prevent microwave leakage and ensure smooth hot air circulation and greatly improve baking performance. The hot air structure comprises a metal cover plate used for covering an opening of an inner container, wherein the metal cover plate is provided with a mounting hole used for being communicated with the inner container; a ventilation baffle is fixedly arranged in the metal cover plate and is provided with a plurality of strip-shaped holes; a fan comprises a motor body arranged outside the metal cover plate, a fan blade arranged between the metal cover plate and the ventilation baffle, and a driving shaft penetrating through the mounting hole and connected with the motor body and the fan blade at two ends; a heating pipe is arranged between the metal cover plate and the ventilation baffle; and a shielding assembly comprises a metal mesh arranged around the driving shaft and covering the mounting hole.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, and in particular to a hot air structure and a steam oven / micro-cooking machine. Background Technology

[0002] As people's living standards improve, steam ovens and microwave cooking machines, as kitchen appliances for baking food, are widely loved by consumers because they can quickly heat food to create a crispy crust while maintaining sufficient nutrition.

[0003] Currently, steam ovens on the market not only heat food in the inner cavity directly with microwaves, but also commonly use a fan installed on the back of the inner cavity to circulate hot air. Heating tubes are installed on the outer periphery of the fan blades, so that the gas in the inner cavity first enters the cavity through the air inlet on the hot air baffle, and after being heated, it flows into the inner cavity through the air outlet on the hot air baffle under the centrifugal force of the fan blades, thus forming a hot air circulation in the inner cavity to bake the food in the inner cavity.

[0004] However, although this type of steam oven can prevent microwave leakage by opening small round holes in the hot air baffle as air inlets and outlets, it will affect the smoothness of hot air circulation, resulting in poor baking performance of hot air circulation. Utility Model Content

[0005] Therefore, it is necessary to address the problem of poor baking performance caused by poor hot air circulation in existing steam ovens; this application provides a hot air structure and a steam oven that can prevent microwave leakage while ensuring smooth hot air circulation and significantly improve baking performance.

[0006] In one embodiment of this application, a hot air structure is provided, comprising: a metal cover plate for sealing the opening of an inner liner, and the metal cover plate having an installation hole for communicating with the inner liner; a ventilation baffle fixed inside the metal cover plate and having a plurality of strip-shaped holes; a fan including a motor body disposed outside the metal cover plate, fan blades disposed between the metal cover plate and the ventilation baffle, and a drive shaft passing through the installation hole and having its two ends respectively connected to the motor body and the fan blades; a heating tube disposed between the metal cover plate and the ventilation baffle; and a shielding assembly including a metal mesh arranged around the drive shaft and covering the installation hole.

[0007] In one embodiment of this application, the metal mesh has a multi-layered cylindrical structure to be fitted around the drive shaft, and the two ends of the metal mesh abut against the metal cover plate and the motor body, respectively.

[0008] In one embodiment of this application, the shielding assembly further includes a sealing sleeve arranged around the drive shaft and sealing the mounting hole.

[0009] In one embodiment of this application, the sealing sleeve is a silicone sleeve that is fitted inside the metal mesh and has its two ends embedded in the metal cover plate and the motor body, respectively.

[0010] In one embodiment of this application, the ventilation baffle has an air inlet area corresponding to the fan blade and having the strip-shaped hole, an air outlet area located around the air inlet area and having the strip-shaped hole, and a fixed connection area located around the air outlet area and fixedly connected to the metal cover plate.

[0011] In one embodiment of this application, the portion of the metal cover plate that contacts the fixing area is provided with an annular step, the fixing area is fitted and fixed to the surface of the annular step, and the edge of the fixing area extends outward from the annular step.

[0012] In one embodiment of this application, the height of the annular step is greater than or equal to 2 mm; the edge of the fixed area extends outward by a distance greater than or equal to 2 mm.

[0013] In one embodiment of this application, the heating tube is arranged around the fan blade to correspond to the air outlet area of ​​the ventilation baffle.

[0014] In one embodiment of this application, the air inlet area of ​​the ventilation baffle has a circular structure, and the air inlet area is recessed from the air outlet area toward the direction close to the fan blade.

[0015] In one embodiment of this application, a plurality of the strip-shaped holes on the air intake area are arranged around the drive shaft array, and each of the strip-shaped holes on the air intake area extends radially curved.

[0016] In one embodiment of this application, the air inlet area is further provided with a circular array of holes surrounded by a plurality of the strip holes, and the diameter of the holes in the circular array of holes gradually increases outward along the radial direction.

[0017] In one embodiment of this application, the plurality of strip-shaped holes on the air outlet area are located in the four corner areas of the air inlet area.

[0018] In one embodiment of this application, the ventilation baffle has a rectangular array of circular holes in a corner of the air outlet area.

[0019] According to another aspect of this application, one embodiment of this application further provides a steam oven / microwave cooking machine, comprising: an inner cavity with an opening; a hot air structure as described in any of the preceding claims, the hot air structure being disposed in the inner cavity and the opening being sealed by a metal cover plate of the hot air structure; and a microwave generator installed in the inner cavity.

[0020] In summary, the multiple strip-shaped holes on the ventilation baffle serve as air inlets and outlets communicating with the inner liner. Their ventilation area is significantly larger than the circular holes on existing hot air baffles, ensuring smooth hot air circulation and greatly improving baking performance. Meanwhile, although some microwaves may leak from the strip-shaped holes on the ventilation baffle to the mounting holes of the metal cover, the hot air structure of this application also shields the microwaves by covering the mounting holes with a metal mesh, preventing microwave leakage to the outside.

[0021] Furthermore, in the hot air structure of this application, the metal cover plate in contact with the fixed area is provided with an annular step. The fixed area of ​​the ventilation baffle is attached to the surface of the annular step, and the edge of the fixed area extends outward from the annular step to prevent the edge of the ventilation baffle from being too close to the metal cover plate, thus effectively avoiding microwave arcing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a steam oven microcooking machine according to an embodiment of this application;

[0023] Figure 2 A perspective cross-sectional view of a steam oven microcooking machine according to the above embodiments of this application is shown;

[0024] Figure 3 An enlarged schematic diagram of part A in the steam oven microcooker according to the above embodiment of this application is shown;

[0025] Figure 4 An enlarged schematic diagram of part B in the steam oven microcooker according to the above embodiment of this application is shown.

[0026] Explanation of key component symbols:

[0027] 10. Hot air structure; 11. Metal cover plate; 111. Mounting hole; 112. Annular step; 12. Ventilation baffle; 1201. Strip hole; 1202. Circular array of round holes; 1203. Rectangular array of round holes; 121. Air inlet area; 122. Air outlet area; 123. Fixed connection area; 13. Fan; 131. Motor body; 132. Fan blade; 133. Drive shaft; 14. Heating tube; 15. Shielding assembly; 151. Metal mesh; 152. Sealing sleeve; 20. Inner liner; 200. Opening; 30. Microwave generator.

[0028] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this application. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] While existing steam ovens can prevent microwave leakage by creating small holes in the hot air baffle as air inlets and outlets, this can affect the smoothness of hot air circulation, resulting in poor baking performance. Therefore, this application provides a hot air structure and a steam oven that can prevent microwave leakage while ensuring smooth hot air circulation, significantly improving baking performance.

[0034] Specifically, see the attached document. Figures 1 to 4 As shown, one embodiment of this application provides a steam oven microcooking machine, which may include an inner pot 20 with an opening 200, a hot air structure 10 disposed in the inner pot 20, and a microwave generator 30 installed in the inner pot 20, so that while the food placed in the inner pot 20 is microwave heated by the microwave generator 30, the hot air structure 10 provides hot air circulation to bake the food placed in the inner pot 20.

[0035] More specifically, such as Figures 1 to 4 As shown, the hot air structure 10 may include a metal cover plate 11, a ventilation baffle 12, a fan 13, a heating pipe 14, and a shielding assembly 15. The metal cover plate 11 is used to cover the opening 200 of the inner liner 20, and the metal cover plate 11 has a mounting hole 111 for communicating with the inner liner 20. The ventilation baffle 12 is fixed inside the metal cover plate 11, and the ventilation baffle 12 has a plurality of strip holes 1201. The fan 13 includes a motor body 131 disposed outside the metal cover plate 11, fan blades 132 disposed between the metal cover plate 11 and the ventilation baffle 12, and a drive shaft 133 passing through the mounting hole 111 and connecting the motor body 131 and the fan blades 132 at both ends respectively. The heating pipe 14 is disposed between the metal cover plate 11 and the ventilation baffle 12, and is used to heat the airflow driven by the fan blades 132. The shielding assembly 15 includes a metal mesh 151 arranged around the drive shaft 133 and covering the mounting hole 111.

[0036] In this way, the multiple strip-shaped holes 1201 on the ventilation baffle 12 can serve as air inlets and outlets communicating with the inner liner 20. Their ventilation area is much larger than the circular holes on existing hot air baffles, ensuring smooth hot air circulation and significantly improving baking performance. Meanwhile, although some microwaves may leak from the strip-shaped holes 1201 on the ventilation baffle 12 to the mounting holes 111 of the metal cover 11, the hot air structure 10 of this application also shields the microwaves by covering the mounting holes 111 with a metal mesh 151, preventing microwaves from leaking to the outside through the mounting holes 111.

[0037] For example, such as Figure 2 and Figure 3As shown, the metal mesh 151 has a multi-layered cylindrical structure to be fitted around the drive shaft 133, and the two ends of the metal mesh 151 abut against the metal cover plate 11 and the motor body 131 respectively, so as to be clamped between the metal cover plate 11 and the motor body 131 to prevent microwave leakage from the mounting hole 111.

[0038] In addition, such as Figure 3 As shown, the shielding assembly 15 may further include a sealing sleeve 152 arranged around the drive shaft 133 and sealing the mounting hole 111 to prevent airflow from leaking out of the mounting hole 111.

[0039] Optionally, such as Figure 3 As shown, the sealing sleeve 152 is implemented as a silicone sleeve fitted inside the metal mesh 151 and with its two ends respectively embedded in the metal cover plate 11 and the motor body 131, so as to prevent air leakage and prevent hot air or steam from contacting the metal mesh 151, which helps to protect the metal mesh 151 from corrosion and extend the service life of the metal mesh 151.

[0040] According to the above embodiments of this application, as Figures 1 to 4 As shown, the ventilation baffle 12 has an air inlet area 121 corresponding to the fan blades 132 of the fan 13 and having the strip-shaped holes 1201, an air outlet area 122 located around the air inlet area 121 and having the strip-shaped holes 1201, and a fixed connection area 123 located around the air outlet area 122 and fixedly connected to the metal cover plate 11, such that the strip-shaped holes 1201 in the air inlet area 121 are implemented as air inlets, and the strip-shaped holes 1201 in the air outlet area 122 are implemented as air outlets. Thus, when the motor body 131 drives the fan blades 132 to rotate via the drive shaft 133, the gas in the inner liner 20 first flows in through the air inlet and then flows out through the air outlet to form a circulating airflow; simultaneously, the heating tube 14 heats the airflow to form a hot air circulation, facilitating food baking.

[0041] Optionally, such as Figure 2 As shown, the heating tube 14 is arranged around the fan blade 132 to correspond to the air outlet area 122 of the ventilation baffle 12. This allows the gas flowing in from the air inlet to first flow through the fan blade 132 to be pressurized, then flow through the heating tube 14 to be heated, before flowing out from the air outlet. This not only allows the gas heated by the heating tube 14 to contact the food in the inner liner 20 first for better baking, but also prevents the gas heated by the heating tube 14 from contacting the fan blade 132 first. This ensures that the gas, after absorbing heat from the food, contacts the fan blade 132 of the fan 13, which helps to extend the service life of the fan 13.

[0042] Optionally, such as Figure 1 and Figure 2 As shown, the air intake area 121 of the ventilation baffle 12 has a circular structure in order to better match the fan blades 132 of the fan 13.

[0043] Optionally, such as Figure 1 and Figure 2 As shown, a plurality of strip-shaped holes 1201 on the air intake area 121 are arranged in an array around the drive shaft 133, and each strip-shaped hole 1201 on the air intake area 121 extends radially curved in order to better guide the gas in the inner liner 20 to the fan blade 132.

[0044] Optionally, such as Figure 1 and Figure 2 As shown, the air intake area 121 of the ventilation baffle 12 is also provided with a circular array 1202 of round holes surrounded by multiple strip holes 1201, and the diameter of the round holes in the circular array 1202 gradually increases outward along the radial direction, so as to ensure smoother air intake while blocking the drive shaft 133.

[0045] Optionally, such as Figure 2 As shown, the air inlet area 121 is recessed from the air outlet area 122 toward the direction close to the fan blade 132, so as to reduce the distance between the air inlet area 121 of the ventilation baffle 12 and the fan blade 132, which helps to ensure that the airflow flowing in through the air inlet hole is smoothly captured by the fan blade 132 for pressurization.

[0046] Optionally, such as Figure 1 and Figure 2 As shown, the multiple strip-shaped holes 1201 on the air outlet area 122 are located at the four corners of the air inlet area 122 to maximize the distance between the air inlet and outlet, preventing hot air flowing out of the outlet from entering the air inlet before contacting the food, thus improving baking efficiency. Preferably, the multiple strip-shaped holes 1201 on the air outlet area 122 are arranged in a rectangular array, and each strip-shaped hole 1201 extends horizontally.

[0047] In addition, such as Figure 1 and Figure 2 As shown, the ventilation baffle 12 may also have a rectangular array 1203 of round holes in a corner of the air outlet area 122 in order to better guide the hot air out.

[0048] It is worth noting that, since burrs are easily generated at the edges of the fixed area 123 in the ventilation baffle 12, direct contact with the metal cover plate 11 can easily cause microwave arcing. Therefore, to prevent microwave arcing, such as... Figure 2 and Figure 4 As shown, the metal cover plate 11 has an annular step 112 protruding at the part that contacts the fixed area 123. The fixed area 123 of the ventilation baffle 12 is attached to the surface of the annular step 112, and the edge of the fixed area 123 extends outward from the annular step 112.

[0049] Optionally, such as Figure 4 As shown, the height H of the annular step 112 is greater than or equal to 2 mm; the edge extension distance L of the fixed area 123 is greater than or equal to 2 mm, so as to effectively avoid microwave arcing problems.

[0050] According to the above embodiments of this application, as Figure 1 and Figure 2 As shown, the metal cover 11 may, but is not limited to, be located on the rear side of the inner liner 20 to serve as the rear cover of the inner liner. The microwave generator 30 may be located above the inner liner 20.

[0051] In addition, the steam oven may also include a steam generator (not shown in the figure), which may be located below the inner cavity 20, which will not be described in detail in this application.

[0052] It is worth noting that the steam oven micro cooking machine of this application can be controlled by a voice module. It is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the steam oven micro cooking machine to perform corresponding operations, thereby realizing the intelligent control of the steam oven micro cooking machine and improving the user experience.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0054] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A hot air structure, characterized in that, include: A metal cover plate, the metal cover plate being used to seal the opening of the inner liner, and the metal cover plate having mounting holes for communicating with the inner liner; A ventilation baffle is fixed inside the metal cover and has multiple slotted holes. A fan, the fan comprising a motor body disposed outside the metal cover plate, fan blades disposed between the metal cover plate and the ventilation baffle, and a drive shaft passing through the mounting hole and having its two ends respectively connected to the motor body and the fan blades; A heating element is disposed between the metal cover plate and the ventilation baffle. as well as The shielding assembly includes a metal mesh arranged around the drive shaft and covering the mounting hole.

2. The hot air structure according to claim 1, characterized in that, The metal mesh has a multi-layered cylindrical structure to be fitted around the drive shaft, and the two ends of the metal mesh abut against the metal cover plate and the motor body, respectively.

3. The hot air structure according to claim 1, characterized in that, The shielding assembly also includes a sealing sleeve arranged around the drive shaft and sealing the mounting hole.

4. The hot air structure according to claim 3, characterized in that, The sealing sleeve is a silicone sleeve that is fitted inside the metal mesh and has its two ends embedded in the metal cover plate and the motor body, respectively.

5. The hot air structure according to any one of claims 1 to 4, characterized in that, The ventilation baffle has an air inlet area corresponding to the fan blade and having the strip-shaped holes, an air outlet area around the air inlet area and having the strip-shaped holes, and a fixed connection area around the air outlet area and fixedly connected to the metal cover plate.

6. The hot air structure according to claim 5, characterized in that, The metal cover plate has an annular step protruding at the part that contacts the fixing area. The fixing area is attached to the surface of the annular step, and the edge of the fixing area extends outward from the annular step.

7. The hot air structure according to claim 6, characterized in that, The height of the annular step is greater than or equal to 2 mm; the edge of the fixed connection area extends outward by a distance greater than or equal to 2 mm.

8. The hot air structure according to claim 5, characterized in that, The heating element is arranged around the fan blade to correspond to the air outlet area of ​​the ventilation baffle.

9. The hot air structure according to claim 5, characterized in that, The air intake area of ​​the ventilation baffle has a circular structure, and the air intake area is recessed from the air outlet area toward the direction closer to the fan blade; The multiple strip-shaped holes on the air intake area are arranged around the drive shaft array, and each of the strip-shaped holes on the air intake area extends radially in a curved manner; the air intake area also has an annular array of circular holes surrounded by the multiple strip-shaped holes, and the diameter of the circular holes in the annular array of circular holes gradually increases outward along the radial direction. The multiple strip-shaped holes on the air outlet area are located at the four corners of the air inlet area; the ventilation baffle has a rectangular array of round holes in one corner of the air outlet area.

10. A steam-bake micro cooking machine, characterized in that, include: The inner liner has an opening; The hot air structure as described in any one of claims 1 to 9, wherein the hot air structure is disposed in the inner liner, and the metal cover plate of the hot air structure seals the opening; as well as A microwave generator is installed in the inner liner.

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