An oven

Abstract

The application relates to the technical field of kitchen appliances, and discloses an oven. The oven comprises an inner container, the inner container is provided with an inner cavity; a fan cover is located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity, the fan cover comprises: a flat plate structure, the flat plate structure is opposite to a first side plate of the inner container, the flat plate structure is provided with an air inlet part, the air inlet part is communicated with the cooking cavity and the hot air cavity; a flow guide structure is arranged on the circumferential side of the flat plate structure; along the circumferential side of the flow guide structure, the flow guide structure and the inner wall of the opposite inner container are both provided with an air outlet spacing; a first fan is located in the hot air cavity, air in the hot air cavity enters the cooking cavity through the air outlet spacing, and air in the cooking cavity enters the hot air cavity through the air inlet part; wherein the air outlet spacing is negatively correlated with the distance from the side edge of the flat plate structure corresponding to the flow guide structure to the axis of the first fan. The oven provided by the application has high cooking efficiency and good uniformity of heat distribution in the cooking cavity.

Description

Technical Field

[0001] This application relates to the technical field of kitchen appliances, and more particularly to an oven. Background Technology

[0002] An oven is an electrical appliance used for cooking and heating food. It generates heat using electricity, gas, or other energy sources and distributes the heat evenly within an enclosed space to achieve the purpose of cooking or baking.

[0003] In related technologies, an oven includes an outer shell and an inner cavity located within the outer shell. A fan shroud is located within the inner cavity to divide the inner cavity into a hot air chamber and a cooking chamber. The fan is located in the hot air chamber. An air outlet is provided on the fan shroud, through which air from the hot air chamber enters the cooking chamber.

[0004] However, the cooking efficiency is low, and the heat distribution within the cooking cavity is not uniform. Utility Model Content

[0005] This application provides an oven with high cooking efficiency and good uniformity of heat distribution within the cooking cavity.

[0006] This application provides an oven, comprising:

[0007] shell;

[0008] The inner liner is located inside the outer shell and has an inner cavity.

[0009] A fan shroud, located within the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity, the fan shroud comprising:

[0010] The flat plate structure is opposite to the first side plate of the inner pot. The flat plate structure is provided with an air inlet, which connects the cooking cavity and the hot air cavity.

[0011] The airflow guiding structure is located on the periphery of the flat plate structure; along the periphery of the airflow guiding structure, there is an air outlet gap between the airflow guiding structure and the inner wall of the corresponding inner liner.

[0012] The first fan is located in the hot air chamber. Air in the hot air chamber enters the cooking chamber through the air outlet gap, and air in the cooking chamber enters the hot air chamber through the air inlet. The air outlet gap is negatively correlated with the distance from the side of the flat plate structure corresponding to the guide structure to the axis of the first fan.

[0013] The oven provided in this application includes an outer shell, an inner cavity, a fan cover, and a first fan. The inner cavity is located inside the outer shell and has an inner cavity. The fan cover is located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity. The fan cover includes a flat plate structure and a guide structure. The flat plate structure is opposite to the first side plate of the inner cavity and has an air inlet that connects the cooking cavity and the hot air cavity. The guide structure is located on the periphery of the flat plate structure. Along the periphery of the guide structure, there is an air outlet gap between the guide structure and the inner wall of the opposing inner cavity. The first fan is located in the hot air cavity. Air in the hot air cavity enters the cooking cavity through the air outlet gap, and air in the cooking cavity enters the hot air cavity through the air inlet. In this way, the fan cover can form a non-enclosed space. Air in the hot air cavity can enter the cooking cavity through the air outlet gap under the guidance of the guide structure, resulting in a larger air outlet range, thereby reducing collision loss and improving air volume and uniformity. Furthermore, the fan shroud creates a non-enclosed space, which is beneficial for increasing the spatial size of the hot air cavity, increasing the size of the heating element and the fan, increasing the power of the heating element, and increasing the air volume and speed generated by the fan, thus improving cooking efficiency. Further, the distance between the air outlets is negatively correlated with the distance from the side of the flat plate structure corresponding to the guide structure to the axis of the first fan. During the operation of the first fan, the airflow flows outward from the outer edge of the first fan, along the axial direction of the first fan; the closer to the outer edge of the first fan, the greater the air speed. When the distance from the axis of the first fan to each side of the flat plate structure is different, the air speed at the corresponding guide structure on each side is different, which is detrimental to the uniformity of airflow into the cooking cavity. Therefore, by adjusting the air speed through different air outlet distances, in areas with low air speed, a smaller air outlet distance can utilize the narrow tube effect to increase the airflow velocity, allowing the airflow from all around the fan shroud to circulate forward to the vicinity of the door, improving the temperature uniformity of the cooking cavity.

[0014] In some embodiments, the flow guiding structure includes:

[0015] Two first flow guides are arranged opposite each other along a first direction of the flat plate structure. In the orthographic projection of the first flow guide towards the extension plane of the first side plate, there is a first gap between the outer edge of the first flow guide and the inner wall of the corresponding inner liner.

[0016] Two second flow guides are arranged opposite each other along a second direction of the flat plate structure; in the orthographic projection of the second flow guide towards the extension plane of the first side plate, there is a second distance between the outer edge of the second flow guide and the inner wall of the corresponding inner liner.

[0017] The fan's axis passes through the center of the first side plate and the flat plate structure. The dimension of the first side plate along the first direction is smaller than the dimension along the second direction. The dimension of the flat plate structure along the first direction is smaller than the dimension along the second direction. The second spacing is smaller than the first spacing.

[0018] Both the first direction and the second direction are parallel to the plane where the first side plate is located, and the first direction is perpendicular to the second direction.

[0019] In this way, by utilizing the narrow tube effect, it is beneficial to increase the speed of the air flowing out through the second gap, so that the airflow from all sides can circulate forward to the vicinity of the door, thereby improving the temperature uniformity of the cooking cavity.

[0020] In some embodiments, the end face of the flat plate structure facing away from the first side plate has a first included angle with the extension plane of the first guide portion;

[0021] The end face of the flat plate structure facing away from the first side plate has a second included angle with the extended plane of the second guide section;

[0022] The dimension of the flat plate structure along the first direction is smaller than the dimension along the second direction, and the first included angle is smaller than the second included angle.

[0023] In this way, by utilizing the narrow tube effect, it is beneficial to increase the speed of the air flowing out through the second gap, so that the airflow from all sides can circulate forward to the vicinity of the door, thereby improving the temperature uniformity of the cooking cavity.

[0024] In some embodiments, the first included angle is greater than 85° and less than 110°; the second included angle is greater than 105° and less than 130°.

[0025] When the first included angle is less than 85°, the deceleration effect is more obvious, and it is easy to increase the speed difference. When the first included angle is greater than 110°, the acceleration effect is more obvious, and it is easy to increase the speed difference.

[0026] When the first included angle is less than 105°, the speed-up effect is poor. When the first included angle is greater than 130°, the speed-up effect is more obvious, but it is easy to increase the speed difference.

[0027] In some embodiments, the height of the flow guiding structure is greater than 7 mm and less than 13 mm along the direction perpendicular to the extension plane of the first side plate.

[0028] When the height of the airflow guide structure is less than 7mm, it is too short to effectively guide the airflow, causing the air coming from the side to be directly drawn back by the central air intake, failing to complete the entire cycle of hot air rushing to the vicinity of the oven door and then returning. When the height of the airflow guide structure is greater than 23mm, its excessive length will affect the installation of the left and right side racks and the positioning of the baking rack and baking tray (affecting the effective cooking volume).

[0029] In some embodiments, the corners of the flat plate structure are provided with cutting portions, which correspond one-to-one with the corners of the inner wall of the inner liner and are matched, and there is a gap between the cutting portions and the corresponding corners of the inner wall of the inner liner.

[0030] The flow guiding structure also includes a third flow guiding section, which is arranged in a one-to-one correspondence with the cutting section. The end face of the flat plate structure facing away from the first side plate has a third included angle with the extension plane of the third flow guiding section.

[0031] In the orthographic projection of the third guide section toward the extension plane of the first side plate, there is a third distance between the outer edge of the third guide section and the inner wall of the corresponding inner liner.

[0032] In this way, the corners of the flat plate structure are chamfered, especially the upper left and right corners, to maintain consistency with the shape of the cavity. Under this condition, the air blown out by the first fan is effectively prevented from colliding violently at the corners, which is conducive to air circulation.

[0033] In some embodiments, a heating element is also included, which is disposed around the periphery of the first fan and serves as the sole heat source.

[0034] The flow guiding structure is located on the side of the flat plate structure opposite to the first side plate;

[0035] The first fan includes a motor and fan blades. The motor is connected to the inner liner, and the fan blades are connected to the drive shaft of the motor. The axis of the air inlet is collinear with the axis of the first fan, and the diameter of the air inlet is equal to the outer diameter of the fan blades.

[0036] In this way, eliminating other heating elements can reduce costs, and the airflow structure does not occupy the space of the hot air chamber. The installation space for the first fan and heating elements is larger, and the size of the air inlet is larger, which is conducive to increasing the circulating air volume and improving cooking efficiency.

[0037] In some embodiments, a heat dissipation component is also included, which is located at the top of the inner liner. The heat dissipation component includes a heat dissipation duct and a second fan located in the heat dissipation duct. The inner cavity of the heat dissipation duct is connected to the cooking cavity.

[0038] The motor includes a motor coil and a motor control board. The motor coil is located in the hot air cavity, and the motor control board is located at the top of the inner liner and on one side of the heat dissipation component. The motor coil and the motor control board are electrically connected.

[0039] In this way, the second fan can cool down the motor control board, which helps to extend the service life of the motor control board.

[0040] In some embodiments, a temperature detection element is also included. The temperature detection element is connected to the first side plate and is close to the air outlet gap. Air in the hot air cavity enters the cooking cavity after passing through the air outlet gap and the temperature detection element.

[0041] In this way, the temperature sensor is close to the air outlet and can come into contact with the circulating air, allowing for faster detection of the heating element's heating status and temperature changes. Simultaneously, the temperature in the central area of ​​the cooking cavity is transferred to the vicinity of the temperature sensor after entering through the central air inlet and being heated by the heating element, resulting in more accurate temperature estimation in the central area of ​​the cooking cavity.

[0042] This application provides an oven, comprising:

[0043] shell;

[0044] The inner liner is located inside the outer shell and has an inner cavity.

[0045] A fan shroud, located within the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity, the fan shroud comprising:

[0046] The flat plate structure is opposite to the first side plate of the inner pot. The flat plate structure is provided with an air inlet, which connects the cooking cavity and the hot air cavity.

[0047] The airflow guiding structure is located on the periphery of the flat plate structure; along the periphery of the airflow guiding structure, there is an air outlet gap between the airflow guiding structure and the inner wall of the corresponding inner liner.

[0048] The first fan is located in the hot air chamber;

[0049] Under the action of the first fan, air in the hot air chamber enters the cooking chamber through the air outlet gap, and air in the cooking chamber enters the hot air chamber through the air inlet; wherein, along the periphery of the guide structure, the air outlet gap between the guide structure and the inner wall of the opposite inner liner is at least partially different, so as to adjust the speed at which air enters the hot air chamber.

[0050] In this way, the fan shroud can form a non-enclosed space. Air from the hot air chamber can enter the cooking chamber through the outlet spacing under the guidance of the flow-guiding structure, resulting in a larger air outlet range. This reduces collision losses and improves airflow volume and uniformity. Furthermore, the non-enclosed space created by the fan shroud allows for larger hot air chamber dimensions, which in turn allows for larger heating elements and a larger fan, increasing the power of the heating elements and the airflow volume and velocity generated by the first fan, thus improving cooking efficiency. Further, the outlet spacing is negatively correlated with the distance from the side of the flat plate structure corresponding to the flow-guiding structure to the axis of the first fan. During the operation of the first fan, the airflow flows outward from the outer edge of the first fan along its axial direction; the closer to the outer edge, the greater the airflow velocity. When the distance from the axis of the first fan to each side of the flat plate structure is different, the airflow velocity at the corresponding flow-guiding structure varies, which is detrimental to the uniformity of airflow into the cooking chamber. Therefore, by adjusting the air outlet spacing, the air speed can be increased in areas with low air speed by using the narrow tube effect, so that the airflow around the fan cover can circulate forward to the vicinity of the door, thereby improving the temperature uniformity of the cooking cavity. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of an oven provided in an embodiment of this application;

[0052] Figure 2 This is a schematic diagram of the oven structure after the door has been removed, as provided in an embodiment of this application.

[0053] Figure 3 for Figure 2 The main view;

[0054] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0055] Figure 5 for Figure 3 A sectional view along the BB direction;

[0056] Figure 6 A schematic diagram of the structure of the first fan, the first side plate, and the heating element in an oven provided in an embodiment of this application;

[0057] Figure 7 This is a schematic diagram of the structure of the fan cover in the oven provided in the embodiments of this application;

[0058] Figure 8 for Figure 4 A magnified view of a section at point C;

[0059] Figure 9 for Figure 5 A magnified view of a section at point D;

[0060] Figure 10 This is a schematic diagram of the connecting column in the oven provided in an embodiment of this application;

[0061] Figure 11 This is a schematic diagram of the structure of the fan cover and the first side plate in the oven provided in an embodiment of this application;

[0062] Figure 12 for Figure 11 The main view;

[0063] Figure 13 for Figure 11 Top view;

[0064] Figure 14 for Figure 11 Side view;

[0065] Figure 15 for Figure 7 The main view;

[0066] Figure 16 A cross-sectional view of the inner cavity and fan shroud of an oven provided in an embodiment of this application;

[0067] Figure 17 For along Figure 15 A sectional view along the EE direction;

[0068] Figure 18 For along Figure 15 Sectional view along the FF direction;

[0069] Figure 19 for Figure 17 A magnified view of a section at point G in the middle;

[0070] Figure 20 for Figure 19 A magnified view of a section at point H in the middle;

[0071] Figure 21 for Figure 16 A magnified view of a section at point K;

[0072] Figure 22 Another cross-sectional view of the inner cavity and fan shroud of the oven provided in the embodiments of this application;

[0073] Figure 23 for Figure 22 A magnified view of a section at point L;

[0074] Figure 24 for Figure 7 A sectional view.

[0075] Explanation of reference numerals in the attached figures:

[0076] 100 - Box body; 110 - Outer shell; 120 - Inner liner; 121 - First side panel;

[0077] 200 - Fan cover; 210 - First connecting part; 220 - Air inlet; 230 - Flat plate structure; 240 - Airflow guiding structure; 241 - First airflow guiding part; 242 - Second airflow guiding part; 243 - Third airflow guiding part; 250 - Cutting part;

[0078] 300 - First fan; 310 - Fan blade;

[0079] 400 - Heating element;

[0080] 500-Gate Body;

[0081] 600 - Connecting component; 610 - Connecting post; 611 - Abutting part; 620 - First connecting member; 630 - Second connecting member;

[0082] 700 - Heat dissipation component;

[0083] 800 - Temperature sensing element. Detailed Implementation

[0084] An electric oven is a cooking device that heats food inside the oven by passing electricity through heating elements. In the past, traditional ovens, such as those with upper and lower heating elements, transferred heat to food through natural air convection and partial radiation. This method was slow and often resulted in a large temperature difference between the oven temperature probe and the center of the food. Moreover, this method easily led to uneven cooking of the ingredients.

[0085] The hot air mode uses a centrifugal fan to quickly force the hot air around the heating element into the entire cavity, greatly improving the heat transfer rate. It also reduces the temperature difference between the food and the oven probe to some extent, preventing the oven from misjudging that the set temperature has been reached when the temperature at the probe is too high but the temperature in the center is too low and thus not heating. This mode heats up faster and cooks more evenly.

[0086] In related technologies, the fan shroud in the oven abuts against the inner wall of the inner cavity, forming a hot air chamber between the fan shroud and the inner cavity. The hot air chamber houses the fan and heating element. An air inlet is located in the center of the fan shroud, and air outlets are located at the corners of the fan shroud. Under the action of the fan, air from the hot air chamber enters the cooking cavity through the air outlets, and air from the cooking cavity enters the cooking cavity through the air inlets.

[0087] However, one end of the fan shroud abuts against the inner wall of the inner cavity, forming a closed hot air chamber. Due to space constraints, the heating element and fan blades inside the fan shroud are very small. On the one hand, to ensure the long-term reliability of the heating element, its power density cannot be very high, therefore the power of the hot air heating element is also low. On the other hand, the matching hot air fan blades are also very small, relying solely on rotational speed to increase airflow and velocity (currently, the rotational speed of hot air fans in ovens on the market is generally between 1500 and 2500 rpm, and the airflow velocity is between 1.0 m / s and 2.0 m / s). Furthermore, the circulating airflow generated by the fan will only escape from the air outlet after self-collision within the fan shroud, with some airflow being lost before it can circulate throughout the entire cavity. Because it must match the structure of the fan, the air inlet area of ​​the corresponding fan shroud is also very small, resulting in a relatively small overall airflow in the system, insufficient to meet the conditions for high-volume, rapid circulation. According to the thermodynamic heat transfer formula, the heat transfer efficiency of an object is positively correlated with the flow rate and surface area. In other words, under the same food and temperature conditions, the flow rate of hot air is the only factor that determines how quickly the same food cooks. Therefore, by increasing the air volume and air speed, cooking efficiency can be improved.

[0088] To address the aforementioned technical problems, the oven provided in this application includes an outer shell, an inner cavity, a fan shroud, and a first fan. The inner cavity is located inside the outer shell and has an inner cavity. The fan shroud is located within the inner cavity, dividing it into a cooking cavity and a hot air cavity. The fan shroud includes a flat plate structure and a guide structure. The flat plate structure is opposite to the first side plate of the inner cavity, and the fan shroud has an air inlet that connects the cooking cavity and the hot air cavity. The guide structure is located around the periphery of the flat plate structure, and there is an air outlet gap between the guide structure and the inner wall of the opposing inner cavity. The first fan is located in the hot air cavity. Air in the hot air cavity enters the cooking cavity through the air outlet gap, and air in the cooking cavity enters the hot air cavity through the air inlet. In this way, the fan shroud can form a non-enclosed space, allowing air in the hot air cavity to enter the cooking cavity through the air outlet gap under the guidance of the guide structure, resulting in a larger air outlet range, thereby reducing collision loss and improving air volume and uniformity. Moreover, the fan cover forms a non-enclosed space, which is conducive to increasing the space size of the hot air cavity, increasing the size of the heating element and the fan, increasing the power of the heating element, and increasing the air volume and speed generated by the fan, thus improving cooking efficiency.

[0089] Furthermore, the distance between the air outlets is negatively correlated with the distance from the side of the flat plate structure corresponding to the airflow guide structure to the axis of the first fan. During the operation of the first fan, the airflow flows outward from the outer edge of the first fan along its axial direction; the closer to the outer edge of the first fan, the greater the airflow speed. When the distance from the axis of the first fan to each side of the flat plate structure is different, the airflow speed at the corresponding airflow guide structure on each side is different, which is not conducive to the uniformity of airflow into the cooking cavity. Therefore, by adjusting the airflow speed through different air outlet distances, in areas with low airflow speeds, a smaller air outlet distance can utilize the narrow tube effect to increase the airflow speed, allowing the airflow from all around the fan shroud to circulate forward to the vicinity of the door, thus improving the temperature uniformity of the cooking cavity.

[0090] To make the objectives and implementation methods of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the exemplary embodiments described are only some embodiments of this application, and not all embodiments.

[0091] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0092] The terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms are interchangeable where appropriate.

[0093] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0094] Figure 1 This is a schematic diagram of the structure of an oven provided in an embodiment of this application.

[0095] See Figure 1 As shown, the oven includes a housing 100.

[0096] The enclosure 100 includes an outer shell 110. The outer shell 110 serves both protective and aesthetic purposes.

[0097] In some embodiments, the housing 100 includes an inner liner 120.

[0098] The inner liner 120 is located within the outer shell 110. The space between the outer wall of the inner liner 120 and the inner wall of the outer shell 110 can be used to install components such as heat dissipation assemblies. The inner liner 120 has an inner cavity.

[0099] In some embodiments, the inner wall of the inner liner 120 is provided with an enamel layer. The enamel layer provides corrosion resistance to the inner liner 120, and also prevents odor generation and facilitates cleaning. It should be noted that the rear wall, top wall, bottom wall, left wall, and right wall of the inner liner are all provided with an enamel layer.

[0100] Figure 2 This is a schematic diagram of the structure of an oven after the door has been removed, as provided in an embodiment of this application. Figure 3 for Figure 2 The main view. Figure 4 for Figure 2 Sectional view along the AA direction. Figure 5 for Figure 2 A sectional view along the BB direction.

[0101] See Figures 2 to 5 As shown, in some embodiments, the oven includes a fan shroud 200.

[0102] The fan cover 200 is located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity.

[0103] It should be noted that the fan cover 200 serves to protect the user from direct contact with the moving fan blades 310 and heating element. Furthermore, the fan cover 200, together with the inner liner 120, forms a certain airflow channel, helping to circulate the air inside the oven better and more systematically.

[0104] Figure 6 This is a schematic diagram of the structure of the first fan, the first side plate, and the heating element in the oven provided in an embodiment of this application.

[0105] See Figure 6 As shown, in some embodiments, the oven includes a first fan 300 located in the hot air cavity. The first fan 300 is used to accelerate the circulation of air in the cooking cavity and the hot air cavity.

[0106] In some embodiments, the oven includes a heating element 400 located in a hot air chamber. The heating element 400 is located around the periphery of the first fan 300. The heating element 400 is used to heat air in the hot air chamber.

[0107] See Figure 1 As shown, in some embodiments, the oven includes a door 500. The door 500 is rotatably connected to the oven body 100, and the door 500 rotates relative to the oven body 100 to open or close the cooking cavity.

[0108] Figure 7 This is a schematic diagram of the structure of the fan cover in the oven provided in an embodiment of this application.

[0109] See Figure 7 As shown, in some embodiments, the fan cover 200 is provided with a first connecting portion 210. The first connecting portion 210 is used to fix the fan cover 200.

[0110] Specifically, the first connecting portion 210 can be a light hole that penetrates the fan shroud 200 along the depth direction of the housing 100. Wherein, the depth direction is... Figure 1 The direction indicated by the Y-axis.

[0111] Figure 8 for Figure 4 A magnified view of a section at point C. Figure 9 for Figure 5 A magnified view of a section at point D. Figure 10 This is a schematic diagram of the connecting column in the oven provided in an embodiment of this application.

[0112] See Figures 8 to 10 As shown, in some embodiments, the oven includes a connecting assembly 600. The connecting assembly 600 is used to secure the fan shroud 200.

[0113] The number of connecting components 600 can be at least two. Specifically, the number of connecting components 600 is four, and the four connecting components 600 are located near the corners of the fan cover 200.

[0114] In some embodiments, the connecting assembly 600 includes a connecting post 610. The connecting post 610 is used for connection with the inner liner 120.

[0115] The connecting post 610 is connected to the first side plate 121 of the inner liner 120 along its extending direction. It should be noted that the first side plate 121 can be the rear wall of the inner liner 120. Alternatively, the first side plate 121 can be the top wall of the inner liner 120. Alternatively, the first side plate 121 can be the side wall of the inner liner 120. Alternatively, the first side plate 121 can be the bottom wall of the inner liner 120. The following explanation uses the example of the first side plate 121 being the rear wall of the inner liner 120.

[0116] The connecting column 610 has an abutment portion 611 on its outer wall, which abuts against the fan cover 200 and is located in the hot air cavity. The second side of the connecting column 610 along its extension direction is inserted into the first connecting portion 210. Specifically, the end of the abutment portion 611 facing the fan cover 200 abuts against the end face of the fan cover 200 facing the first side plate 121.

[0117] In some embodiments, the connecting assembly 600 includes a first connector 620. The first connector 620 is used to secure the fan cover 200 to the connecting post 610.

[0118] The first connector 620 is located in the cooking cavity and is connected to the second side of the connecting post 610 along its extension direction to fix the fan cover 200 to the connecting post 610. The extension direction of the connecting post 610 can be the depth direction of the housing 100, that is, the front-to-back direction of the housing 100. Figure 1 The direction indicated by the Y-axis.

[0119] Understandably, the length of the connecting column 610 along its extension direction can be designed according to requirements to meet the dimensional requirements of the hot air cavity along the depth direction of the housing 100 and the installation space requirements of the heating tube 400. Specifically, the heating tube 400 can be provided with multiple turns, and the multiple turns of the heating tube 400 are arranged along the depth direction of the housing 100.

[0120] Figure 11 This is a schematic diagram of the structure of the fan cover and the first side plate in the oven provided in the embodiments of this application. Figure 12 for Figure 11 The main view, Figure 13 for Figure 11 Top view, Figure 14 for Figure 11 Side view.

[0121] See Figures 11 to 14 As shown, the fan cover 200 has a gap from the enamel layer of the first side panel 121, and the periphery of the fan cover 200 has a gap from the enamel layer of the inner liner 120. Specifically, the fan cover 200 has a gap from the enamel layer of the first side panel 121 along the depth direction of the housing 100. The fan cover 200 has a gap from the top and bottom walls of the inner liner 120 along the height direction of the housing 100. The fan cover 200 has a gap from the two side walls of the inner liner 120 along the width direction of the housing 100. The depth direction is... Figure 1 The direction indicated by the Y-axis. The width direction is... Figure 1 The direction indicated by the X-axis. The height direction is... Figure 1 The direction indicated by the Z-axis.

[0122] This application provides an oven, which includes an outer shell 110, an inner cavity 120, a fan cover 200, and a connecting assembly 600. The inner cavity 120 is located inside the outer shell 110 and has an inner cavity. The inner wall of the inner cavity 120 is provided with an enamel layer. The fan cover 200 is located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity. The fan cover 200 is provided with a first connecting portion 210. The connecting assembly 600 includes a connecting post 610 and a first connecting member 620. A first side of the connecting post 610 along its extension direction is connected to a first side plate 121 of the inner cavity 120. An abutment portion 611 is provided on the outer wall of the connecting post 610. The abutment portion 611 abuts against the fan cover 200. The abutment portion 611 is located in the hot air cavity. A second side of the connecting post 610 along its extension direction is inserted into the first connecting portion 210. The first connector 620 is located in the cooking cavity and connects to the second side of the connecting post 610 along its extension direction to fix the fan cover 200 to the connecting post 610. The fan cover 200 has a gap between itself and the enamel layer of the first side plate 121, and a gap between its periphery and the enamel layer of the inner liner 120. Thus, when disassembling the fan cover 200, only the first connector 620 inside the cooking cavity needs to be removed to remove the fan cover 200; the connecting post 610 does not need to be disassembled. When installing the fan cover 200, it only needs to be fixed to the connecting post 610, which is highly convenient. Furthermore, the gap between the fan cover 200 and the first side plate 121, and the gap between its periphery and the enamel layer of the inner liner 120, prevents damage to the enamel layer during installation and removal of the fan cover 200.

[0123] In some embodiments, the first connector 620 is a cap nut, which is threaded to the second side of the connecting post 610 along its extension direction. It is understood that by providing a cap nut, the cap nut can cover the end of the connecting post 610, thus making it less likely for the user to be scratched by the second side of the connecting post 610 along its extension direction. Furthermore, it improves aesthetics. Specifically, the outer wall of the second side of the connecting post 610 along its extension direction is provided with threads.

[0124] In some embodiments, the connecting assembly 600 includes a second connector 630. The second connector 630 is used to connect the connecting post 610 to the first side plate 121. The first side plate 121 is provided with a second connecting portion. The second connecting portion can be a light hole that penetrates the fan shroud 200 along the depth direction of the housing 100.

[0125] In some embodiments, the first side of the connecting post 610 along its extension direction is located in the hot air cavity. The second connector 630 is partially located outside the inner liner 120, and is inserted into the first side of the connecting post 610 along its extension direction via a second connecting portion to connect the connecting post 610 and the first side plate 121. Specifically, the first side of the connecting post 610 along its extension direction is provided with a threaded hole, and the second connector 630 can be a screw. This allows for the installation and removal of the second connector 630 from outside the inner liner 120.

[0126] In other embodiments, the first side of the connecting post 610 along its extension direction is inserted into the second connecting portion, and a portion of the connecting post 610 is located outside the inner liner 120. The second connecting member is located outside the inner liner 120 and is connected to the portion of the connecting post 610 located outside the inner liner 120 to connect the connecting post 610 and the first side plate 121. Thus, the second connecting member can be installed and removed from the outside of the inner liner 120.

[0127] In some embodiments, the second connector is a cap nut, which is threadedly connected to the portion of the connecting post 610 located outside the inner liner 120. It is understood that by providing the cap nut, the cap nut can cover the end of the connecting post 610, thereby reducing the risk of the user being scratched by the first side of the connecting post 610 along its extension direction. Furthermore, it improves aesthetics. Specifically, the outer wall of the first side of the connecting post 610 along its extension direction is provided with threads.

[0128] See Figures 11 to 14 As shown, in some embodiments, the fan cover 200 is provided with an air inlet 220, which connects the cooking chamber and the hot air chamber. The air inlet 220 is disposed opposite to the first fan 300. There is an air outlet gap between the periphery of the fan cover 200 and the inner wall of the inner liner 120. Under the action of the first fan 300, air in the hot air chamber enters the cooking chamber through the air outlet gap. Air in the cooking chamber enters the hot air chamber through the air inlet 220. It should be noted that there is an air outlet gap between the periphery of the fan cover 200 and the inner wall of the inner liner 120, that is, air can be discharged from all four sides of the fan cover 200 (top side, bottom side, and both sides along the width direction of the housing 100).

[0129] Understandably, in related technologies, the fan cover 200 has circular or elongated holes at its front or around its perimeter as air outlets. Air inside the cover is drawn into the cooking cavity and ejected circumferentially by the rotation of the first fan 300. Because the fan cover 200 is a relatively enclosed structure, the ejected air collides, circulates repeatedly within the cover, and searches for an outlet. During this process, some airflow collides and generates small vortices. Only the airflow that overcomes these obstacles is then discharged through the openings into the inner liner 120. Simultaneously, the airflow discharged through the openings of the fan cover 200 cannot cover the entire inner liner 120, leading to uneven temperature distribution in different areas. Therefore, additional openings are needed at locations with uneven temperatures to balance the airflow and ensure relatively uniform temperature across all areas. Furthermore, the fan cover 200 is formed by stretching sheet metal, and the stretching depth is limited to avoid tearing. Therefore, the dimensions of the hot air chamber along the depth direction of the housing 100 are limited, restricting the number of turns and power of the heating element 400. The depth direction of the housing 100 is... Figure 1 The direction indicated by the Z-axis.

[0130] The fan shroud 200 provided in this embodiment forms a non-enclosed space, allowing air to exit from all four sides. This effectively prevents hot air from forming vortices within the fan shroud 200, thus avoiding obstruction of internal hot air circulation and flow. It also reduces internal airflow collision losses, increases airflow volume and speed, thereby accelerating heat exchange and significantly improving cooking efficiency. Furthermore, the ability to exit air from all four sides of the fan shroud 200 helps improve the uniformity of temperature within the cooking cavity. Moreover, the non-enclosed space created by the fan shroud 200 allows for larger hot air cavity dimensions, which in turn allows for larger heating element 400 and fan dimensions, increasing the power of the heating element 400 and enhancing the airflow volume and speed generated by the fan, further improving cooking efficiency.

[0131] Figure 15 for Figure 7 The main view. Figure 16 A cross-sectional view of the inner liner and fan cover of an oven provided in an embodiment of this application.

[0132] See Figures 11 to 16 As shown, in some embodiments, the fan shroud 200 includes a flat plate structure 230. The flat plate structure 230 is designed to prevent a user from easily touching the first fan 300 and the heating element 400.

[0133] The flat plate structure 230 is opposite to the first side plate 121, and the first connecting part 210 is disposed on the flat plate structure 230. The air inlet 220 is disposed on the flat plate structure 230. There is a gap between the enamel layer of the flat plate structure 230 and the first side plate 121, and there is a gap between the periphery of the flat plate structure 230 and the enamel layer of the inner liner 120.

[0134] Specifically, the flat plate structure 230 is flat. The orthographic projection of the flat plate structure 230 toward the extension plane of the first side plate 121 can be rectangular, square, or circular, etc. The extension plane of the first side plate 121 is... Figure 1 The plane shown by the Z-axis and X-axis.

[0135] In some embodiments, the fan shroud 200 includes a flow guide structure 240. The flow guide structure 240 is used to guide air from the hot air chamber to the cooking chamber.

[0136] The airflow guiding structure 240 is disposed on the periphery of the flat plate structure 230. Along the periphery of the airflow guiding structure 240, there is an air outlet gap between the airflow guiding structure 240 and the inner wall of the inner liner 120. Specifically, the airflow guiding structure 240 is disposed on the outer edge of the flat plate structure 230, and the airflow guiding structure 240 is located on the side of the flat plate structure 230 opposite to the first side plate 121. There is an air outlet gap between the periphery of the airflow guiding structure 240 and the enamel layer of the inner liner 120.

[0137] Under the action of the first fan 300, air in the hot air chamber enters the cooking chamber through the air outlet gap. Air in the cooking chamber enters the hot air chamber through the air inlet 220. During the operation of the first fan 300, the airflow flows outward from the outer edge of the first fan 300, along the axial direction of the first fan 300. The closer to the outer edge of the first fan 300, the greater the airflow speed. When the distance from the axis of the first fan 300 to each side of the flat plate structure 230 is different, the airflow speed at the corresponding guide structure 240 on each side is different, which is not conducive to the uniformity of airflow into the cooking chamber.

[0138] Therefore, in some embodiments, the air outlet distance between the air outlet structure 240 and the inner wall of the opposing inner liner 120 is at least partially different along the periphery of the air outlet structure 240 to regulate the speed at which air enters the hot air chamber. Specifically, the air outlet distance is negatively correlated with the distance from the side of the flat plate structure 230 corresponding to the air outlet structure 240 to the axis of the fan.

[0139] It is understandable that the greater the distance from the side of the flat plate structure 230 to the axis of the first fan 300, the smaller the air outlet distance formed by the guide structure 240 and the inner liner 120. Conversely, the smaller the distance from the side of the flat plate structure 230 to the axis of the first fan 300, the larger the air outlet distance formed by the guide structure 240 and the inner liner 120. Specifically, the orthographic projection of the flat plate structure 230 toward the extended plane of the first side plate 121 can be rectangular. The dimension of the flat plate structure 230 along the height direction of the housing 100 is smaller than the dimension of the flat plate structure 230 along the width direction of the housing 100. Therefore, the air outlet distance formed by the guide structures 240 located at the bottom and top of the flat plate structure 230 is greater than the air outlet distance formed by the guide structures 240 located at both ends of the flat plate structure 230 along the width direction of the housing 100. In this way, the air speed can be adjusted by varying the distance between the air outlets. In areas with low air speed, a smaller distance between the air outlets can increase the airflow by utilizing the narrow tube effect, allowing the airflow from all around the fan cover 200 to circulate forward to the vicinity of the door 500, thereby improving the temperature uniformity of the cooking cavity.

[0140] The oven provided in this embodiment includes an outer shell 110, an inner cavity 120, a fan cover 200, and a first fan 300. The inner cavity 120 is located inside the outer shell 110 and has an inner cavity. The fan cover 200 is located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity. The fan cover 200 includes a flat plate structure 230 and a guide structure 240. The flat plate structure 230 is opposite to the first side plate 121 of the inner cavity 120. The fan cover 200 has an air inlet 220 that connects the cooking cavity and the hot air cavity. The guide structure 240 is disposed on the periphery of the flat plate structure 230. Along the periphery of the guide structure 240, there is an air outlet gap between the guide structure 240 and the inner wall of the inner cavity 120. The first fan 300 is located in the hot air cavity. Air in the hot air cavity enters the cooking cavity through the air outlet gap, and air in the cooking cavity enters the hot air cavity through the air inlet 220. In this way, the fan shroud 200 can form a non-enclosed space. Air from the hot air cavity can enter the cooking cavity through the outlet spacing under the guidance of the guide structure 240, resulting in a larger outlet range, thereby reducing collision losses and improving air volume and uniformity. Moreover, the non-enclosed space formed by the fan shroud 200 is beneficial for increasing the spatial size of the hot air cavity, increasing the size of the heating element 400 and the fan, increasing the power of the heating element 400, and increasing the air volume and speed generated by the fan, thus improving cooking efficiency. Furthermore, the outlet spacing is negatively correlated with the distance from the side of the flat plate structure 230 corresponding to the guide structure 240 to the axis of the first fan 300. By adjusting the air velocity through different outlet spacings, in areas with low air velocity, a smaller outlet spacing can increase the airflow velocity by utilizing the narrow tube effect, allowing the airflow from all sides of the fan shroud 200 to circulate forward to the vicinity of the door 500, improving the temperature uniformity of the cooking cavity.

[0141] In some embodiments, the flow guide structure 240 is formed by bending. It is understood that the flow guide structure 240 is formed by bending with a mold, eliminating the need for a stretching mold and reducing mold investment costs.

[0142] Figure 17 For along Figure 15 Sectional view along the EE direction. Figure 18 For along Figure 15 Sectional view along the FF direction. Figure 19 for Figure 17 A magnified view of a section at point G. Figure 20 for Figure 18 A magnified view of a section at point H. Figure 21 This is a magnified view of a portion of point K in section 16. Figure 22 This is another cross-sectional view of the inner cavity and fan shroud of the oven provided in an embodiment of this application. Figure 23 for Figure 22 A magnified view of the area at point L.

[0143] See Figures 17 to 20 As shown, in some embodiments, the airflow guiding structure 240 is located on the side of the flat plate structure 230 opposite to the first side plate 121. This facilitates the flow of air from the hot air cavity to the cooking cavity. Moreover, the airflow guiding structure 240 does not occupy space in the hot air cavity, thereby ensuring sufficient installation space for the first fan 300 and the heating element 400. For example, the outer diameters of the first fan 300 and the heating element 400 can be increased.

[0144] In some embodiments, in the orthographic projection of the fan cover 200 toward the extended plane of the first side plate 121, the distance between the outer edge of the flow guiding structure 240 and the enamel layer of the inner liner 120 is greater than 5 mm and less than 30 mm.

[0145] Understandably, when the gap between the outer edge of the guide structure 240 and the enamel layer of the inner liner 120 is less than 5mm, the small gap is not conducive to the air flowing out of the hot air cavity. Furthermore, during installation, the fan cover 200 is prone to contact with the enamel layer, potentially damaging it. When the gap between the outer edge of the guide structure 240 and the enamel layer of the inner liner 120 is greater than 30mm, the large gap is not conducive to accelerating the air flowing out of the gap. Moreover, the fan cover 200 is relatively small, which is not conducive to increasing the installation space for the first fan 300 and the heating pipe 400.

[0146] In some embodiments, the distance between the outer edge of the flow guiding structure 240 and the enamel layer of the inner liner 120 is greater than 10 mm and less than 20 mm. Specifically, the distance between the outer edge of the flow guiding structure 240 and the enamel layer of the inner liner 120 can be 12 mm, 14 mm, 15 mm, 16 mm, or 18 mm, etc.

[0147] In some embodiments, the flow guiding structure 240 includes two first flow guiding portions 241.

[0148] Two first guide sections 241 are arranged opposite each other along a first direction of the flat plate structure 230. In the orthographic projection of the first guide section 241 toward the extension plane of the first side plate 121, there is a first distance a between the outer edge of the first guide section 241 and the inner wall of the corresponding inner liner 120.

[0149] In some embodiments, the flow guiding structure 240 includes two second flow guiding sections 242.

[0150] Two second flow guides 242 are arranged opposite each other along a second direction of the flat plate structure 230. In the orthographic projection of the second flow guide 242 toward the extension plane of the first side plate 121, there is a second distance b between the outer edge of the second flow guide 242 and the inner wall of the corresponding inner liner 120.

[0151] It should be noted that the first direction can be the height direction of the box 100. The height direction of the box 100 is as follows: Figure 1 The direction indicated by the Z-axis. The second direction can be the width direction of the housing 100. The width direction of the housing 100 is as follows: Figure 1 The direction indicated by the Y-axis. Both the first and second directions are parallel to the plane containing the first side plate 121, and the first direction is perpendicular to the second direction.

[0152] The fan's axis passes through the center of the first side plate 121 and the flat plate structure 230. The dimension of the first side plate 121 along the first direction is smaller than its dimension along the second direction, and the dimension of the flat plate structure 230 along the first direction is smaller than its dimension along the second direction. The second gap b is smaller than the first gap a. This utilizes the narrow tube effect to increase the speed of the air flowing out through the second gap b, allowing the airflow from all sides to circulate forward to the vicinity of the door 500, thus improving the temperature uniformity of the cooking cavity.

[0153] In some embodiments, the end face of the flat plate structure 230 facing away from the first side plate 121 has a first included angle c with the extended plane of the first guide portion 241. The end face of the flat plate structure 230 facing away from the first side plate 121 has a second included angle d with the extended plane of the second guide portion 242. The dimension of the flat plate structure 230 along the first direction is smaller than the dimension along the second direction, and the first included angle c is smaller than the second included angle d. In this way, by utilizing the narrow tube effect, it is beneficial to increase the velocity of the air flowing out through the second spacing b, so that the airflow in all directions can circulate forward to the vicinity of the door body 500, thereby improving the temperature uniformity of the cooking cavity.

[0154] In some embodiments, the first included angle c is greater than 85° and less than 110°. Specifically, the first included angle c can be 90°. When the first included angle c is less than 85°, the deceleration effect is more obvious, and it is easier to increase the speed difference. When the first included angle c is greater than 110°, the speed increase effect is more obvious, and it is easier to increase the speed difference.

[0155] In some embodiments, the second included angle d is greater than 105° and less than 130°. Specifically, the second included angle d can be 120°. When the first included angle c is less than 105°, the speed-up effect is poor. When the first included angle c is greater than 130°, the speed-up effect is more obvious, but it is easy to increase the speed difference.

[0156] Typically, the height dimension of the inner cavity 120 is smaller than its width dimension. However, since the fan blades 310 emit air circumferentially, the airflow is consistent across all angles (up, down, left, and right). But due to the shape of the inner cavity 120 (smaller in the height direction), the airflow in the vertical direction contacts the inner cavity 120 wall earlier and diffuses towards the center of the inner cavity 120, resulting in a higher unit wind speed. Therefore, the required forward guiding effect is not as large, so the first guide section 241 only needs to be a 90° flange. The inner cavity 120 wall is wider in the horizontal direction of the oven, resulting in a lower forward wind speed for the same airflow. Therefore, the second guide section 242 is angled larger to utilize the Venturi effect to make the airflow on both sides circulate forward faster. Thus, the second guide section 242 is designed to squeeze the air out towards the inner wall, forcing a higher wind speed for faster forward circulation.

[0157] In some embodiments, along the direction perpendicular to the extension plane of the first side plate 121, that is, the depth direction of the housing 100, the height of the flow guiding structure 240 is greater than 7 mm and less than 13 mm.

[0158] Understandably, when the height of the airflow guide structure 240 is less than 7mm, it is too short to effectively guide the airflow, causing the air coming from the side to be directly drawn back by the central air intake 220, failing to complete the entire cycle of hot air reaching the oven door 500 and returning. When the height of the airflow guide structure 240 is greater than 23mm, its excessive length will affect the installation of the left and right side racks and the positioning of the baking rack and baking tray (affecting the effective cooking volume).

[0159] In some embodiments, the height e of the flow guiding structure 240 is 8 to 12 mm, specifically, the height of the flow guiding structure 240 is 10 mm.

[0160] In some embodiments, the corner of the flat plate structure 230 is provided with a cutting portion 250, which corresponds to and matches the corner of the inner wall of the inner liner 120, and there is a gap between the cutting portion 250 and the corresponding corner of the inner wall of the inner liner 120.

[0161] The flow guiding structure 240 also includes a third flow guiding part 243, which is provided in a one-to-one correspondence with the cutting part 250. The end face of the flat plate structure 230 away from the first side plate 121 has a third included angle with the extension plane of the third flow guiding part 243.

[0162] Specifically, the third included angle can be 90°.

[0163] In the orthographic projection of the third guide section 243 toward the extended plane of the first side plate 121, the outer edge of the third guide section 243 has a third distance f between it and the inner wall of the corresponding inner liner 120.

[0164] It can be understood that by chamfering the corners of the flat plate structure 230, especially the upper left and right corners, to maintain consistency with the shape of the cavity, the air blown out by the first fan 300 is effectively prevented from violently colliding at the corners, which is conducive to air circulation.

[0165] See Figure 12 As shown, in some embodiments, the third spacing f is 18 to 25 mm. When the third spacing f is greater than 25 mm, the excessive distance will cause the dimensions of the first guide section 241 along the width of the housing 100 and the dimensions of the second guide section 242 along the height of the housing 100 to become shorter, thus losing their original strong air guiding effect. When the third spacing f is less than 18 mm, the excessive distance will approach a non-angled state, causing the wind in this area to be distorted and the airflow to collide, resulting in some loss of airflow.

[0166] In some embodiments, the heating element 400 is the sole heat source.

[0167] Understandably, this example eliminates the upper and lower heating elements, which are essential for ovens in related technologies. Corresponding structural components such as heating element covers and heating element flange seals can be directly eliminated, thereby reducing costs. Furthermore, by eliminating the upper heating element, space occupancy is reduced, allowing for an increase in the dimensions of the flat plate structure 230 along the height of the cabinet 100, thus increasing the installation space for the first fan 300 and the heating elements.

[0168] Understandably, the heating element 400 provides heat for both the rapid preheating and cooking stages. In this system, because the fan shroud 200 is an open design, the number of rotations of the heating element 400 is not limited by the front and rear spatial position, and can be 2-5 rotations. Simultaneously, the outer diameter of the heating element 400 is not limited by the stretching space of the fan shroud 200, but only by the internal space of the oven cavity. Therefore, under these conditions, the power of the heating element 400 can be increased by increasing its outer diameter and the number of rotations. Thus, in this system, any suitable power can be selected to meet the needs of rapid heating during the rapid preheating stage and rapid heat replenishment after opening and closing the oven door.

[0169] See Figure 3 , Figure 7 and Figure 8 As shown, in some embodiments, the axis of the air inlet 220 is collinear with the axis of the fan, and the diameter of the air inlet 220 is equal to the outer diameter of the fan blade 310 of the first fan 300. This results in a larger air inlet 220, which helps to increase the circulating air volume and improve cooking efficiency.

[0170] For example, the outer diameter of the fan blade 310 of the first fan 300 is 200mm, and the outer diameter of the air inlet 220 is 200mm.

[0171] In some embodiments, the air inlet 220 includes an air inlet grille, with a spacing of 10 mm between the grilles. It should be noted that the shape is not limited to being divided by three radially aligned straight lines; it can also be divided by four or five lines, etc.

[0172] In some embodiments, there is a gap between the flat plate structure 230 and the first fan 300, the gap being greater than 5 mm and less than 10 mm.

[0173] When the gap between the flat plate structure 230 and the first fan 300 is less than 5mm, the gap is too small and may cause assembly errors or manufacturing errors of the fan blade 310 to collide with the fan cover 200, resulting in an accident. When the gap between the flat plate structure 230 and the first fan 300 is greater than 10mm, the gap is too large and will not be able to introduce sufficient air volume from the air inlet 220, nor will it be able to form a suitable acceleration channel between the fan blade 310 and the fan cover 200 and expel hot air from all sides.

[0174] In some embodiments, the distance between the rear end of the fan cover 200 and the surface of the heating element 400 is greater than 5 mm. This ensures that the rear heating element 400 does not transfer too much heat to the area near the fan cover 200 at the rear of the baking pan due to its proximity to the fan cover 200, effectively preventing high temperature accumulation in that area.

[0175] In some embodiments, the first fan 300 includes a motor. The motor is connected to the back panel of the inner liner 120.

[0176] In some embodiments, the first fan 300 includes a fan blade 310 connected to the drive shaft of a motor, the axis of the air inlet 220 is collinear with the axis of the first fan 300, and the diameter of the air inlet 220 is equal to the outer diameter of the fan blade 310.

[0177] Understandably, in related technologies, the outer diameter of the heating tube 400 is limited by the space of the fan shroud 200, thus the outer diameter of the fan blade 310 is relatively small, generally between 100mm and 150mm. According to the impeller-driven airflow formula, the airflow is strongly correlated with the outer diameter and rotational speed of the fan blade 310, and the increase in airflow due to changes in the outer diameter is greater. Therefore, in this embodiment, to meet the requirement of high airflow circulation, the outer diameter of the fan blade 310 can be increased to seek higher airflow, based on matching the heating tube 400, with the fan outer diameter being 180mm-230mm. Simultaneously, considering the possible forward and reverse rotation of the first fan 300, and to effectively avoid fatigue damage caused by resonance, the number of fan blades 310 can be a prime number (5, 7, 11, or 13) to effectively avoid the adverse effects of resonance that may be caused by forward and reverse rotation. Considering that the blades can cover the height of the heating tube 400, 7 or 11 fan blades 310 can be used.

[0178] In some embodiments, since the first fan 300 has a sufficiently large air volume, its rotation speed is preferably between 1200 and 1800 rpm, which ensures a system wind speed of 2.6 to 4.2 m / s, allowing for a larger air inlet and a greater circulating air volume. Increasing the rotation speed further would result in excessive power consumption and noise from the first fan 300, while decreasing it further would make the wind speed similar to that of a traditional oven, failing to improve cooking efficiency.

[0179] Figure 24 for Figure 7 A sectional view.

[0180] See Figure 24 As shown, along the depth direction of the housing 100, the side of the fan blade 310 facing the fan cover 200 is flush with the side of the heating element 400 facing the fan cover 200. Alternatively, the distance between the side of the fan blade 310 facing the fan cover 200 and the fan cover 200 is less than the distance between the side of the heating element 400 facing the fan cover 200 and the fan cover 200. It should be noted that all heating elements 400 should be swept by hot air.

[0181] In some embodiments, considering the impact of motor capability and forward / reverse rotation on the strength of the fan blade 310, the fan blade 310 adopts a sheet metal integrated stamping design, which has high structural strength and light weight.

[0182] In some embodiments, the blade shape of the fan blade 310 can be selected as a backward-curved blade, with a backward-curving angle of 10° to 45°, resulting in higher efficiency.

[0183] See Figure 4 As shown, in some embodiments, a heat dissipation assembly 700 is also included. The heat dissipation assembly 700 is used to cool the cooking cavity.

[0184] The heat dissipation assembly 700 is located at the top of the inner liner 120. The heat dissipation assembly 700 includes a heat dissipation duct and a second fan located in the heat dissipation duct. The inner cavity of the heat dissipation duct is connected to the cooking cavity. The motor includes a motor coil and a motor control board. The motor coil is located in the hot air cavity, and the motor control board is located at the top of the inner liner 120 and on one side of the heat dissipation assembly 700. The motor coil and the motor control board are electrically connected.

[0185] Understandably, the high temperature inside the hot air chamber, coupled with the motor control board's location at the top of the inner liner 120, helps reduce the risk of damage from high temperatures. Furthermore, when the second fan operates, it draws air from the cooking cavity and outside the inner liner 120 into the cooling duct, then discharges it to the outside of the cabinet 100 via the front side. This allows the second fan to cool the motor control board, thus extending its lifespan.

[0186] See Figure 9 As shown, in some embodiments, a temperature detection element 800 is also included. The temperature detection element 800 is used to detect the temperature inside the cooking cavity.

[0187] The temperature detection element 800 is connected to the first side plate 121. The temperature detection element 800 is close to the air outlet gap. The air in the hot air cavity enters the cooking cavity after passing through the air outlet gap and the temperature detection element 800.

[0188] Specifically, the temperature sensing element 800 can be a temperature sensor.

[0189] In related technologies, the temperature sensor 800 is located relatively far from the air outlet of the fan shroud 200. During oven preheating, the temperature inside the cooking cavity is high. However, after the user places food in the cooking cavity, the temperature sensor 800 is still far from the air outlet of the fan shroud 200. This makes it difficult for cooled air to circulate back to the temperature sensor 800, potentially creating a temperature dead zone. The temperature detected by the temperature sensor 800 remains at the preheating stage temperature, which is too high and hinders timely heating control of the heating element 400.

[0190] In this embodiment, the temperature sensor 800 is located close to the air outlet, allowing it to come into contact with the circulating air and quickly detect the heating status and temperature changes of the heating element 400. Simultaneously, the temperature in the central area of ​​the cooking cavity is transferred to the vicinity of the temperature sensor 800 after entering through the central air inlet 220 and being heated by the heating element 400, resulting in more accurate temperature estimation in the central area of ​​the cooking cavity.

[0191] In some embodiments, the heating element 400 can be stopped in advance to utilize residual heat to reach the set temperature, preventing temperature overshoot and making temperature control more accurate.

[0192] In some embodiments, the distance between the temperature sensing element 800 and the heating element 400 is greater than 50mm. This effectively avoids interference and misjudgment of the temperature sensing element 800 caused by the heat generated by the direct thermal radiation of the heating element 400, ensuring that the temperature received by the temperature sensing element 800 is basically the temperature of the hot air passing through the heating element 400. This eliminates the temperature dead zone near the temperature sensing element 800, resulting in more accurate cooking temperature.

[0193] In some embodiments, the first fan 300 may be an AC shaded-pole motor or a DC motor.

[0194] Specifically, the first fan 300 is a DC motor, which has the advantage of matching different wind speeds according to different duty cycles to suit different recipes. For example, different wind speeds are used for cooking pastries and meats to achieve better results. Moreover, the fan blades 310 can be controlled to rotate in both directions to enhance the uniformity of the cavity.

[0195] In some embodiments, the specific control logic of the oven is as follows:

[0196] After selecting a cooking program, the oven first activates the rapid preheating mode. In this mode, the first fan 300 operates at full speed in the forward direction, while the heating element 400 also operates at maximum power (all rear heating elements 400 are fully operational). The internal temperature of the oven is rapidly and evenly increased.

[0197] After preheating, open the door 500, put in the ingredients, and close the door. The first stage is the door opening and reheating stage (to replenish the heat lost by opening the door 500). The heating time for this stage depends on the length of time the door is opened and closed and the degree of temperature drop in the central area of ​​the cooking cavity.

[0198] Because the temperature sensor 800 is close to the air outlet, an early stop method is used to estimate the temperature. For example, the actual set temperature is 0.95 times the sensor temperature plus 21°C (e.g., if the set temperature is 200°C, the heating element 400 relay will disconnect when the sensor detects 188°C, and temperature control will begin). During cooking, the program automatically determines and selects the appropriate fan speed and whether to use forward or reverse rotation based on the recipe type.

[0199] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0200] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. An oven, characterized in that, include: Outer shell (110); Inner liner (120), the inner liner (120) is located inside the outer shell (110), and the inner liner (120) is provided with an inner cavity; A fan cover (200) is located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity; The fan cover (200) includes: A flat plate structure (230) is provided, which is opposite to the first side plate (121) of the inner liner (120); the flat plate structure (230) is provided with an air inlet (220), which connects the cooking cavity and the hot air cavity; a guide structure (240) is provided on the periphery of the flat plate structure (230); along the periphery of the guide structure (240), there is an air outlet gap between the guide structure (240) and the inner wall of the opposite inner liner (120); A first fan (300) is located in the hot air chamber. The first fan (300) drives the air in the hot air chamber to enter the cooking chamber through the air outlet distance. The air in the cooking chamber returns to the hot air chamber through the air inlet (220). The air outlet spacing is negatively correlated with the distance from the side of the flat plate structure (230) corresponding to the air guide structure (240) to the axis of the first fan (300).

2. The oven according to claim 1, characterized in that, The flow guiding structure (240) includes: Two first guide sections (241) are arranged opposite each other along a first direction of the flat plate structure (230). In the orthographic projection of the first guide section (241) toward the extension plane of the first side plate (121), the outer edge of the first guide section (241) has a first distance between it and the inner wall of the corresponding inner liner (120). Two second flow guides (242) are arranged opposite each other along a second direction of the flat plate structure (230); in the orthographic projection of the second flow guide (242) toward the extension plane of the first side plate (121), the outer edge of the second flow guide (242) has a second distance between it and the inner wall of the corresponding inner liner (120); Wherein, the axis of the first fan (300) passes through the center of the first side plate (121) and the flat plate structure (230), the dimension of the first side plate (121) along the first direction is smaller than the dimension along the second direction, the dimension of the flat plate structure (230) along the first direction is smaller than the dimension along the second direction, and the second spacing is smaller than the first spacing; Both the first direction and the second direction are parallel to the plane where the first side plate (121) is located, and the first direction is perpendicular to the second direction.

3. The oven according to claim 2, characterized in that, The end face of the flat plate structure (230) facing away from the first side plate (121) has a first included angle with the extended plane of the first guide portion (241); The flat plate structure (230) has a second included angle between the end face of the first side plate (121) and the extended plane of the second guide portion (242); The dimension of the flat plate structure (230) along the first direction is smaller than the dimension along the second direction, and the first included angle is smaller than the second included angle.

4. The oven according to claim 3, characterized in that, The first included angle is greater than 85° and less than 110°; the second included angle is greater than 105° and less than 130°.

5. The oven according to any one of claims 1 to 4, characterized in that, Along the direction perpendicular to the extension plane of the first side plate (121), the height of the flow guiding structure (240) is greater than 7 mm and less than 13 mm.

6. The oven according to any one of claims 1 to 4, characterized in that, The corner of the flat plate structure (230) is provided with a cutting part (250), the cutting part (250) corresponds one-to-one with the corner of the inner wall of the inner liner (120) and matches it, and there is a gap between the cutting part (250) and the corresponding corner of the inner wall of the inner liner (120). The flow guiding structure (240) further includes a third flow guiding part (243), which is provided in a one-to-one correspondence with the cutting part (250). The end face of the flat plate structure (230) facing away from the first side plate (121) has a third included angle with the extension plane of the third flow guiding part (243). In the orthographic projection of the third guide section (243) toward the extended plane of the first side plate (121), the outer edge of the third guide section (243) has a third distance between it and the inner wall of the corresponding inner liner (120).

7. The oven according to any one of claims 1 to 4, characterized in that, It also includes a heating element (400), which is disposed on the periphery of the first fan (300) and is the only heat source; The flow guiding structure (240) is located on the side of the flat plate structure (230) opposite to the first side plate (121); The first fan (300) includes a motor and a fan blade (310). The motor is connected to the inner liner (120), and the fan blade (310) is connected to the drive shaft of the motor. The axis of the air inlet (220) is collinear with the axis of the first fan (300), and the diameter of the air inlet (220) is equal to the outer diameter of the fan blade (310).

8. The oven according to claim 7, characterized in that, It also includes a heat dissipation assembly (700), which is located on top of the inner liner (120). The heat dissipation assembly (700) includes a heat dissipation duct and a second fan located in the heat dissipation duct. The inner cavity of the heat dissipation duct is connected to the cooking cavity. The motor includes a motor coil and a motor control board. The motor coil is located in the hot air cavity, and the motor control board is located on the top of the inner liner (120) and on one side of the heat dissipation assembly (700). The motor coil is electrically connected to the motor control board.

9. The oven according to any one of claims 1 to 4, characterized in that, It also includes a temperature detection element (800), which is connected to the first side plate (121). The temperature detection element (800) is close to the air outlet gap. The air in the hot air cavity enters the cooking cavity after passing through the air outlet gap and the temperature detection element (800).

10. An oven, characterized in that, include: shell; Inner liner (120), the inner liner (120) is located inside the outer shell, and the inner liner (120) is provided with an inner cavity; A fan shroud (200) located in the inner cavity to divide the inner cavity into a cooking cavity and a hot air cavity, the fan shroud (200) comprising: A flat plate structure (230) is provided, which is opposite to the first side plate (121) of the inner liner (120). The flat plate structure (230) is provided with an air inlet (220), which connects the cooking cavity and the hot air cavity. A flow guiding structure (240) is disposed on the periphery of the flat plate structure (230); along the periphery of the flow guiding structure (240), there is an air outlet gap between the flow guiding structure (240) and the inner wall of the opposite inner liner (120); A first fan (300) is located in the hot air chamber; Under the action of the first fan (300), the air in the hot air cavity enters the cooking cavity through the air outlet distance, and the air in the cooking cavity enters the hot air cavity through the air inlet (220); wherein, along the periphery of the guide structure (240), the air outlet distance between the guide structure (240) and the inner wall of the opposite inner liner (120) is at least partially different, so as to adjust the speed at which the air enters the hot air cavity.

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