Oven

Abstract

The utility model relates to an oven which comprises an inner container, a top hot air chamber is horizontally arranged on the top wall of the inner container, the top hot air chamber comprises an air inlet area located in the center and an air outlet area arranged on the periphery of the air inlet area in a surrounding mode, and hot air fan blades are horizontally installed in the air inlet area. The air inlet area is arranged in the inner container and provided with an air inlet which is communicated with an inner cavity of the inner container and right faces the hot-air fan blades, the air outlet area is provided with an air outlet communicated with the inner cavity of the inner container, the air inlet is lower than the air outlet, and the air outlet is opposite to the middle of the hot-air fan blades in the height direction. According to the utility model, the cooking function of air frying is achieved by forming up-down high-speed hot air convection in the inner cavity of the inner container, and the flow speed of up-down hot air convection in the inner cavity of the inner container can be increased without additionally increasing the rotating speed of hot air fan blades, so that the cooking effect of air frying is improved, and the cooking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of cooking equipment, in particular to an oven. Background Art

[0002] Air frying is gradually introduced into traditional cooking equipment such as ovens and steam ovens as a healthy cooking method. Generally, high-speed hot air convection is formed in the inner cavity of the inner pot, so that the moisture on the surface of the food is quickly taken away to achieve the cooking effect of air frying. For example, the Chinese invention patent with application number CN202011188600.7 (publication number CN114431721A) discloses a cooking cavity structure with air frying function and an electric oven with the structure, including an inner pot, a hot air baffle with an air inlet and an air outlet is provided on the rear side of the inner cavity of the inner pot, and a hot air chamber is formed between the hot air baffle and the back plate of the inner pot, a hot air blower is installed in the hot air chamber, and the fan blades of the hot air blower are arranged relative to the air inlet of the above-mentioned hot air baffle, and the rotation speed of the hot air blower includes a first rotation speed for the air frying function and a second rotation speed for the baking function, and the first rotation speed is greater than the second rotation speed.

[0003] In the above patent, the front-to-back high-speed hot air convection is obtained by adjusting the speed of the hot air blower, thereby obtaining the air frying function. However, the air frying effect formed by the front-to-back high-speed hot air convection is not good, and the increase in the speed of the hot air blower will increase the power of the cooking equipment and increase the working noise. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an oven with air frying function and good cooking effect and high cooking efficiency in view of the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: an oven, including an inner tank, characterized in that a top hot air chamber is horizontally arranged on the top wall of the inner tank, and the top hot air chamber includes an air inlet area located in the center and an air outlet area surrounded by the air inlet area, wherein hot air fan blades are horizontally installed in the above-mentioned air inlet area, and an air inlet communicated with the inner cavity of the inner tank and directly facing the hot air fan blades is opened, and an air outlet communicated with the inner cavity of the inner tank is opened on the above-mentioned air outlet area, and the setting height of the air inlet is lower than the air outlet, and the setting height of the air outlet is opposite to the middle of the height direction of the hot air fan blades.

[0006] Furthermore, the air inlet area has a horizontally extending and circular air inlet surface, on which air inlet holes are arranged to form an upper air inlet, and the air outlet area has a horizontally extending and circular air outlet surface, on which the air outlet is arranged.

[0007] Furthermore, the air inlet surface of the air inlet area and the air outlet surface of the air outlet area are connected by a guide surface that extends vertically along the circumference and smoothly transitions, so that the gas entering the air inlet area can better enter the air outlet under the centrifugal force of the hot air fan blades and the guidance of the guide surface, and quickly flow back to the inner cavity of the inner tank through the air outlet under the action of adhering to the wall.

[0008] Furthermore, the air outlet area includes a first area and a second area along the circumferential direction, wherein the cross-sectional size of the first area is smaller than that of the second area, and the air outlet is provided on the second area of ​​the air outlet area. In this way, the gas entering the air outlet area can be quickly concentrated to the second area and quickly discharged through the air outlet on the second area.

[0009] Furthermore, the first zone and the second zone are at least two and are staggered along the circumference of the air outlet, and each second zone is provided with the above-mentioned air outlet, so that the gas entering the air outlet zone can be gathered to the second zone more quickly, further improving the air outlet efficiency of the top hot air chamber.

[0010] Furthermore, the cross-sectional size of each first zone of the air outlet area increases from the middle to both ends along the length direction thereof, so that the gas entering the first zone can be directed to the second zones on both sides of the first zone.

[0011] Furthermore, each second zone of the air outlet area has arc-shaped guide surfaces extending in the length direction on the outer sides of both ends along the length direction, so that the gas in the first zone on both sides of each second zone can be introduced into the second zone.

[0012] Furthermore, there are two first and second zones of the air outlet area, wherein the two first zones are symmetrically arranged front to back, and the two second zones are symmetrically arranged left to right. On the one hand, it can ensure that the top hot air chamber evenly discharges air to the inner cavity of the inner tank, thereby facilitating the improvement of the uniformity of the temperature field in the inner cavity of the inner tank, and on the other hand, it can prevent the air outlet of the top hot air chamber from blowing toward the door body, thereby causing heat loss and additional temperature rise of the door body.

[0013] Furthermore, each second zone of the air outlet area is provided with air outlet holes spaced apart along its length direction, and each air outlet hole is arranged to form a corresponding air outlet, so that an air outlet can be formed in each second zone better.

[0014] Furthermore, the air outlet holes of the air outlets are arranged in an arc shape with the central axis of the heat fan blade as the center, so that the gas can be discharged more smoothly through the air outlets under the centrifugal force of the heat fan blade.

[0015] Furthermore, each air outlet of the air outlets respectively includes a first air outlet and a second air outlet arranged at intervals along the radial direction, wherein the first air outlet is located on the inner side of the second air outlet, and the aperture of the first air outlet is smaller than that of the second air outlet, so that the air pressure at the first air outlet can be greater than that at the second air outlet, and the centrifugal effect of the fan blades can make the gas blow out from the second air outlet of each air outlet more quickly, thereby further improving the air outlet speed of each air outlet.

[0016] Furthermore, it also includes an air guide plate, which is horizontally arranged on the inner top surface of the inner liner to enclose the top hot air chamber, and the center of the air guide plate is concave to form a disc-shaped lower groove, and the air inlet area is formed in the top hot air chamber, the air inlet surface and the air outlet surface are both located on the inner surface of the air guide plate, and the air inlet and the air outlet are respectively arranged on the air guide plate. Therefore, it is convenient to set the top hot air chamber on the top wall of the inner liner.

[0017] Furthermore, the top wall of the inner container is concave to form a disc-shaped upper groove at the upper part of the air inlet area, and the upper groove is directly opposite to the lower groove, and the radius of the two is similar, so as to provide sufficient installation space for the hot air fan blades in the top hot air chamber.

[0018] Furthermore, a top heating pipe is arranged at the upper end of the inner cavity of the inner tank below the top hot air chamber, so that the top hot air chamber does not need to be equipped with a separate heating device, and the gas entering the top hot air chamber can be heated directly by using the original top heating pipe.

[0019] Furthermore, an exhaust channel is provided on the inner tank, the exhaust channel has an exhaust fan, and the rotating shaft of the exhaust fan vertically penetrates into the top hot air chamber, and the hot air fan blades are installed on the rotating shaft. In this way, the hot air fan blades and the exhaust fan share a driving device, and no separate driving device is required.

[0020] Furthermore, at least one side of the inner pot is provided with a side air chamber, in which a side fan blade is installed, and a side heating tube is provided around the outer periphery of the side fan blade, and the side air chamber has a side air inlet and a side air outlet respectively connected to the inner cavity of the inner pot, wherein the side air inlet is directly opposite to the side fan blade, and the side air outlet is arranged around the outer periphery of the side air inlet. The side air chamber cooperates with the top hot air chamber to further improve the cooking efficiency of air frying, and also can further improve the cooking effect of air frying.

[0021] Compared with the prior art, the utility model has the advantages that: by setting a top hot air chamber on the top wall of the inner pot, a high-speed hot air convection is formed in the inner cavity of the inner pot, thereby obtaining an air frying cooking function, and compared with the existing front-to-back hot air convection method, the cooking effect is better. In addition, the top hot air chamber includes an air inlet area located in the center and an air outlet area surrounded by the air inlet area. The air inlet of the top hot air chamber is set at a height lower than the air outlet, and the air outlet is set at a height opposite to the middle of the height direction of the hot air fan blades, so that the gas entering the air inlet area can quickly enter the air outlet area under the action of the centrifugal force of the hot air fan blades, and quickly discharge through the air outlet in the air outlet area. The flow rate of the upper and lower hot air convection in the inner cavity of the inner pot can be increased without additionally increasing the rotation speed of the hot air fan blades, thereby further improving the air frying cooking effect and improving the cooking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of an oven in an embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional view of the oven along the AA direction in the embodiment of the utility model;

[0024] Figure 3 for Figure 2 Enlarged view of part C;

[0025] Figure 4 It is a cross-sectional view of the oven along the BB direction in the embodiment of the utility model;

[0026] Figure 5 for Figure 4 A magnified view of part D in the middle;

[0027] Figure 6 This is a partial structural diagram of an oven in an embodiment of the utility model (hiding the top heating tube);

[0028] Figure 7 It is a structural schematic diagram of the air guide plate in the embodiment of the utility model. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0031] like Figures 1 to 7 As shown, an oven includes an inner tank 1, and a hot air baffle 2 is arranged on the rear side of the inner cavity of the inner tank 1, and the hot air baffle 2 and the back plate of the inner tank 1 form a side air chamber 20. In addition, a side hot air blower 70 is installed on the back plate of the inner tank 1, and the side fan blades 7 of the side hot air blower 70 are located in the above-mentioned side air chamber 20, and are surrounded by a circular side heating pipe 12. At the same time, the hot air baffle 2 is respectively provided with a side air inlet 21 and a side air outlet 22, wherein the side air inlet 21 is directly opposite to the above-mentioned side fan blades 7, and the side air outlet 22 is surrounded by the side air inlet 21, so as to form a front and rear hot air circulation in the inner cavity of the inner tank 1. In this embodiment, the above-mentioned side hot air blowers 70 are arranged in two at intervals up and down, and the outer periphery of the side fan blades 7 of each side hot air blower 70 is respectively surrounded by the above-mentioned side heating pipe 12, and there are two side air inlets 21 on the hot air baffle 2 and they correspond to each side fan blade 7 one by one. In addition, a top heating tube 13 is installed on the inner top surface of the inner pot 1 , and an exhaust passage 5 for exhausting the inner pot 1 is arranged above the inner pot 1 , and the exhaust passage 5 has an exhaust fan 6 .

[0032] Furthermore, a top hot air chamber 30 is horizontally arranged on the top wall of the inner liner 1, and the top hot air chamber 30 includes an air inlet area 301 located in the center and an air outlet area 302 arranged around the air inlet area 301. The air inlet area 301 is horizontally installed with a hot air fan blade 4, and an air inlet 31 is provided which is communicated with the inner cavity of the inner liner 1 and directly opposite to the hot air fan blade 4, and the air outlet area 302 is provided with an air outlet 32 ​​which is communicated with the inner cavity of the inner liner 1, and the setting height of the air inlet 31 is lower than that of the air outlet 32, and the setting height of the air outlet 32 ​​is opposite to the middle of the height direction of the hot air fan blade 4.

[0033] The utility model provides a top hot air chamber 30 on the top wall of the inner pot 1, thereby forming a high-speed hot air convection up and down in the inner cavity of the inner pot 1, thereby obtaining an air frying cooking function. Compared with the existing front-to-back hot air convection method, the air frying effect is better. In addition, the top hot air chamber 30 includes an air inlet area 301 located in the center and an air outlet area 302 arranged around the air inlet area 301. The air inlet 31 of the top hot air chamber 30 is set at a height lower than the air outlet 32, and the air outlet 32 ​​is set at a height opposite to the middle of the height direction of the hot air fan blades 4. In this way, the gas entering the air inlet area 301 can quickly enter the air outlet area 302 under the action of the centrifugal force of the hot air fan blades 4, and quickly discharge through the air outlet 32 ​​in the air outlet area 302. The flow rate of the upper and lower hot air convection in the inner cavity of the inner pot 1 can be increased without additionally increasing the rotation speed of the hot air fan blades 4, thereby improving the air frying cooking effect and the cooking efficiency.

[0034] Furthermore, the air inlet area 301 has a horizontally extending circular air inlet surface 3a, on which air inlet holes 311 are arranged to form an upper air inlet 31, and the air outlet area 302 has a horizontally extending circular air outlet surface 3b, on which the air outlet 32 ​​is provided. Moreover, the air inlet surface 3a of the air inlet area 301 and the air outlet surface 3b of the air outlet area 302 are connected by a guide surface 3c extending vertically along the circumference and smoothly transitioning. Thus, the gas entering the air inlet area 301 can better enter the air outlet 32 ​​under the centrifugal force of the hot air fan blades 4 and the guidance of the guide surface 3c, and quickly flow back to the inner cavity of the inner tank 1 through the air outlet 32 ​​under the action of adhering to the wall.

[0035] Furthermore, the air outlet area 302 includes a first area 3021 and a second area 3022 along the circumferential direction, wherein the cross-sectional size of the first area 3021 is smaller than that of the second area 3022, and the air outlet 32 ​​is provided on the second area 3022 of the air outlet area 302. In this way, the gas entering the air outlet area 302 can be quickly concentrated in the second area 3022 and quickly discharged through the air outlet 32 ​​on the second area 3022. Preferably, the first area 3021 and the second area 3022 are at least two and staggered along the circumferential direction of the air outlet 32, and the air outlet 32 ​​is provided on each second area 3022. In this way, the gas entering the air outlet area 302 can be quickly gathered in the second area 3022, further improving the air outlet efficiency of the top hot air chamber 30.

[0036] Further preferably, the cross-sectional size of each first area 3021 of the above-mentioned air outlet area 302 increases from the middle to both ends along the length direction, so that the gas entering the first area 3021 can be guided to the second areas 3022 on both sides of the first area 3021. The outer sides of both ends of each second area 3022 of the above-mentioned air outlet area 302 along the length direction are respectively provided with guide surfaces 303 extending along the length direction and in the shape of an arc, so that the gas in the first area 3021 on both sides of each second area 3022 can be respectively introduced into the second area 3022. Specifically, in this embodiment, there are two first areas 3021 and two second areas 3022 of the above-mentioned air outlet area 302, wherein the two first areas 3021 are symmetrically arranged front to back, and the two second areas 3022 are symmetrically arranged left to right. On the one hand, it can ensure that the top hot air chamber 30 discharges air evenly to the inner cavity of the inner tank 1, which is beneficial to improving the uniformity of the temperature field in the inner cavity of the inner tank 1. On the other hand, it can prevent the air discharged from the top hot air chamber 30 from blowing toward the door body, causing heat loss and additional temperature rise of the door body.

[0037] Further, each second zone 3022 of the above-mentioned air outlet area 302 is provided with air outlet holes spaced apart along its length direction, and each air outlet hole is arranged to form a corresponding air outlet 32, so that the air outlet 32 ​​can be formed in each second zone 3022. Preferably, each air outlet hole of each air outlet 32 ​​is arranged in an arc shape with the central axis of the above-mentioned heat fan blade 4 as the center, so that the gas can be discharged more smoothly through each air outlet 32 ​​under the action of the centrifugal force of the heat fan blade 4. Specifically, each air outlet hole of each air outlet 32 ​​includes a first air outlet hole 321 and a second air outlet hole 322 spaced apart along the radial direction. Among them, the first air outlet 321 is located on the inner side of the second air outlet 322, and the aperture of the first air outlet 321 is smaller than that of the second air outlet 322, so that the air pressure at the first air outlet 321 can be greater than that at the second air outlet 322. Combined with the centrifugal effect of the heat fan blades 4, the gas can be blown out from the second air outlet 322 of each air outlet more quickly, thereby further improving the air outlet speed of each air outlet 32.

[0038] There are many specific implementation methods of the top hot air chamber 30, for example, the top wall of the inner liner 1 is designed as a hollow structure, and the inner cavity of the top wall is directly designed as the top hot air chamber 30. In this embodiment, in order to facilitate the arrangement of the top hot air chamber 30 on the top wall of the inner liner 1, an air guide plate 3 is also included. The air guide plate 3 is horizontally arranged on the inner top surface of the inner liner 1 to enclose the top hot air chamber 30, and the center of the air guide plate 3 is concave to form a disc-shaped lower groove 33, and the air inlet area 301 is formed in the top hot air chamber 30. The air inlet surface 3a and the air outlet surface 3b are both located on the inner surface of the air guide plate 3, and the air inlet 31 and the air outlet 32 ​​are respectively arranged on the air guide plate 3. Preferably, the top wall of the inner tank 1 is concave and a disc-shaped upper groove 11 is formed on the upper part of the air inlet area 301. The upper groove 11 is directly opposite to the lower groove 33, and the radii of the two are similar, thereby providing sufficient installation space for the fan blades 4 in the top hot air chamber 30.

[0039] In addition, the top heating pipe 13 is located below the top hot air chamber 30, and the two are arranged adjacent to each other, so that the top hot air chamber 30 does not need to be equipped with a separate heating device, and the gas entering the top hot air chamber 30 can be heated directly by using the original top heating pipe 13. At the same time, the rotating shaft 61 of the exhaust fan 6 vertically penetrates into the top hot air chamber 30, and the hot air fan blades 4 are installed on the rotating shaft 61, so that the hot air fan blades 4 and the exhaust fan 6 share a driving device, and no separate driving device is required.

[0040] The "fluid communication" referred to in the present invention refers to the spatial position relationship between two components or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected to each other, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. An oven, comprising an inner container (1), characterized in that: A top hot air chamber (30) is horizontally arranged on the top wall of the inner liner (1), and the top hot air chamber (30) includes an air inlet area (301) located in the center and an air outlet area (302) arranged around the air inlet area (301), wherein a hot air fan blade (4) is horizontally installed in the air inlet area (301), and an air inlet (31) is provided which is communicated with the inner cavity of the inner liner (1) and directly faces the hot air fan blade (4), and an air outlet (32) is provided on the air outlet area (302) which is communicated with the inner cavity of the inner liner (1), and the air inlet (31) is arranged at a height lower than the air outlet (32), and the air outlet (32) is arranged at a height opposite to the middle of the hot air fan blade (4) in the height direction; The air inlet area (301) has a horizontally extending and circular air inlet surface (3a), on which air inlet holes (311) are arranged to form an upper air inlet (31), and the air outlet area (302) has a horizontally extending and circular air outlet surface (3b), on which the air outlet surface (3b) is provided the air outlet (32). Furthermore, the air inlet surface (3a) of the air inlet area (301) and the air outlet surface (3b) of the air outlet area (302) are connected via a guide surface (3c) extending vertically along the circumferential direction and transitioning smoothly; The air outlet area (302) comprises a first area (3021) and a second area (3022) along the circumferential direction, wherein the cross-sectional size of the first area (3021) is smaller than that of the second area (3022), and the air outlet (32) is arranged on the second area (3022) of the air outlet area (302).

2. The oven according to claim 1, characterized in that: There are at least two first zones (3021) and at least two second zones (3022) respectively, which are staggered along the circumference of the air outlet (32), and each second zone (3022) is provided with the above-mentioned air outlet (32).

3. The oven according to claim 2, characterized in that: The cross-sectional size of each first area (3021) of the air outlet area (302) increases gradually from the middle to both ends along the length direction thereof.

4. The oven according to claim 2 or 3, characterized in that: Each second area (3022) of the air outlet area (302) is provided with an arc-shaped guide surface (303) extending in the length direction and projecting inwards on the outer sides of both ends along the length direction.

5. The oven according to claim 2 or 3, characterized in that: The air outlet area (302) includes two first areas (3021) and two second areas (3022), wherein the two first areas (3021) are symmetrically arranged front to back, and the two second areas (3022) are symmetrically arranged left to right.

6. The oven according to claim 2 or 3, characterized in that: Each second area (3022) of the air outlet area (302) is provided with air outlet holes spaced apart along its length direction, and each air outlet hole is arranged to form a corresponding air outlet (32).

7. The oven according to claim 6, characterized in that The air outlet holes of each of the air outlets (32) are arranged in an arc shape with the central axis of the above-mentioned hot air fan blade (4) as the center.

8. The oven according to claim 7, characterized in that Each air outlet hole of each air outlet (32) comprises a first air outlet hole (321) and a second air outlet hole (322) arranged radially and spaced apart from each other, wherein the first air outlet hole (321) is located on the inner side of the second air outlet hole (322), and the aperture of the first air outlet hole (321) is smaller than that of the second air outlet hole (322).

9. The oven according to any one of claims 1 to 3, characterized in that: The invention also comprises an air guide plate (3), wherein the air guide plate (3) is horizontally arranged on the inner top surface of the inner liner (1) to enclose the top hot air chamber (30), and the center of the air guide plate (3) is concave to form a disc-shaped lower groove (33), and the air inlet area (301) is formed in the top hot air chamber (30), the air inlet surface (3a) and the air outlet surface (3b) are both located on the inner surface of the air guide plate (3), and the air inlet (31) and the air outlet (32) are respectively arranged on the air guide plate (3).

10. The oven according to claim 9, characterized in that The top wall of the inner container (1) is concave to form a disc-shaped upper groove (11) at the upper part of the air inlet area (301). The upper groove (11) is vertically opposite to the lower groove (33), and the radii of the two are similar.

11. The oven according to any one of claims 1 to 3, characterized in that: A top heating pipe (13) is disposed at the upper end of the inner cavity of the inner container (1) below the top hot air chamber (30).

12. The oven according to any one of claims 1 to 3, characterized in that: An exhaust passage (5) is arranged on the inner container (1), and the exhaust passage (5) has an exhaust fan (6), and a rotating shaft (61) of the exhaust fan (6) vertically penetrates into the top hot air chamber (30), and the hot air fan blades (4) are mounted on the rotating shaft (61).

13. The oven according to any one of claims 1 to 3, characterized in that: At least one side of the inner liner (1) is provided with a side air chamber (20), in which a side fan blade (7) is installed, and a side heating tube (12) is provided around the outer periphery of the side fan blade (7), and the side air chamber (20) has a side air inlet (21) and a side air outlet (22) which are communicated with the inner cavity of the inner liner (1), wherein the side air inlet (21) is directly opposite to the above-mentioned side fan blade (7), and the side air outlet (22) is arranged around the outer periphery of the side air inlet (21).

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