Cooking utensil exhaust assembly, cooking utensil and exhaust control method of cooking utensil

Abstract

The invention discloses a cooking utensil exhaust assembly, a cooking utensil and an exhaust control method thereof.The cooking utensil exhaust assembly comprises a shell and blades, an exhaust channel is formed in the shell, exhaust holes communicated with the exhaust channel are formed in the shell, and the blades are located in the exhaust holes and connected with the shell in a pivoted mode; the blades can rotate relative to the shell under blowing of airflow in the exhaust channel. The exhaust assembly of the cooking utensil has the advantages that the exhaust speed is adjustable, and cooked food is good in fragrance and taste.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking appliances, and in particular to a cooking appliance exhaust component, a cooking appliance and an exhaust control method thereof. Background Art

[0002] As we all know, the amount and types of aroma substances produced by most foods during baking are far greater than those produced by other cooking methods. For example, roasted meats and roasted starchy ingredients are far superior to steaming and boiling in terms of aroma and taste. Air fryers in related technologies rely on heating tubes and fans to simulate traditional barbecues, but such appliances are limited by their own working principles. During the cooking process, the air flows at a high speed, and most of the aroma substances produced during the baking process are discharged through the exhaust vents, leaving very few aroma substances after cooking, affecting the user experience. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a cooking appliance exhaust assembly, which has the advantages of adjustable exhaust speed and good aroma and taste of cooked food.

[0005] The embodiments of the present invention further provide a cooking appliance and an exhaust control method thereof.

[0006] The cooking utensil exhaust assembly of the embodiment of the present invention includes a shell and a blade, wherein the shell is provided with an exhaust passage, and the shell is provided with an exhaust hole connected to the exhaust passage; the blade is located in the exhaust hole and is pivotally connected to the shell, and the blade can rotate relative to the shell under the blowing of the airflow in the exhaust passage.

[0007] According to the exhaust assembly of the cooking utensil of the embodiment of the present invention, by setting a blade in the exhaust hole on the shell, and making the blade pivotally connected to the shell, when the airflow in the exhaust channel is discharged from the exhaust hole to the outside, the blade will rotate relative to the shell under the blowing of the airflow to change the ventilation area at the exhaust hole, that is, the faster the airflow velocity in the exhaust channel, the greater the swing amplitude of the blade, the larger the ventilation area exposed at the exhaust hole, and the more exhaust volume per unit time. At this time, when cooking food, the wind pressure in the cooking cavity can be reduced in the set stage to reduce the airflow velocity in the exhaust channel, thereby achieving the purpose of reducing the exhaust volume, effectively preventing most of the aroma components in the cooking cavity from being discharged from the cooking cavity, and the food has a higher aroma and taste after cooking, and the user satisfaction is higher.

[0008] Optionally, a rotating shaft is provided on one of the shell and the blades, and a connecting hole is provided on the other of the shell and the blades. The axial direction of the rotating shaft is perpendicular to the height direction of the shell, the rotating shaft is loosely fitted in the connecting hole, and the blades can pivot relative to the shell around the central axis of the rotating shaft.

[0009] The cooking utensil exhaust assembly of the embodiment of the present invention makes it easier for the blades to rotate relative to the shell by setting a clearance fit between the rotating shaft and the connecting hole, thereby avoiding the poor exhaust of the internal hot and humid gas when the wind pressure in the cooking cavity is low, resulting in the food not being crispy enough. At the same time, by setting the axial direction of the rotating shaft to be a horizontal direction perpendicular to the height direction of the shell, the blades can remain in a vertical state under the action of gravity, so as to achieve the maximum shielding of the exhaust hole.

[0010] Optionally, the rotating shaft is provided at the upper end of the blade, the connecting hole is provided on the shell, and a notch is also provided on the shell, the notch extends along the radial direction of the connecting hole to the inner circumferential surface of the connecting hole, the minimum width of the notch is smaller than the diameter of the rotating shaft, and the rotating shaft is suitable for fitting in the connecting hole through the notch.

[0011] The cooking utensil exhaust assembly of the embodiment of the present invention is provided with a notch on the shell that is connected to the connection hole. The rotating shaft is suitable for pressing the shell to deform when passing through the notch so as to smoothly enter the connection hole, thereby completing the pivot connection between the blade and the shell. The blade can be easily and quickly disassembled from the shell. In addition, by arranging the rotating shaft at the upper end of the blade, it is effectively prevented that the blade cannot be reset when the rotation angle is too large under the blowing of the airflow.

[0012] Optionally, a connecting plate extending along the height direction of the shell is provided in the exhaust hole, the connecting plate is located at the center position of the exhaust hole in the width direction of the shell, and the connecting hole is provided on the connecting plate; a mounting groove is provided on the upper end surface of the blade, the mounting groove passes through the blade along the thickness direction of the blade, the width of the mounting groove is greater than the thickness of the connecting plate, and the rotating shaft is arranged in the mounting groove.

[0013] The cooking utensil exhaust assembly of the embodiment of the present invention provides a connecting plate at the center position of the exhaust hole in the width direction of the shell, and the blades are pivotally connected to the connecting plate, which better reduces the probability of the blades contacting the inner wall surface of the exhaust hole and makes the blades rotate more smoothly.

[0014] Optionally, the inner circumferential surface of the connecting hole is provided with a plurality of first protrusions, or the outer circumferential surface of the rotating shaft is provided with a plurality of second protrusions.

[0015] In the cooking utensil exhaust assembly of the embodiment of the present invention, the provision of the first protrusion and / or the second protrusion effectively reduces the contact area between the rotating shaft and the shell, the sliding friction between the two is lower, the blades rotate more smoothly, and it is more conducive to the exhaust of hot and humid gases in the cooking cavity.

[0016] Optionally, there are a plurality of blades which are arranged in sequence along the height direction of the shell; and / or, the blades are arc-shaped plates with the middle portion bent away from the exhaust passage.

[0017] The cooking utensil exhaust assembly of the embodiment of the present invention has a plurality of blades, so that, on the basis of a certain cross-sectional area of ​​the exhaust hole, a single blade has a smaller size, a lighter weight, and is easier to rotate at a larger angle to ensure smooth exhaust of the hot and humid gas in the cooking cavity. And / or, by setting the blade as an outwardly convex arc plate, the windward area of ​​the blade is larger, and thus the rotation sensitivity of the blade is higher at the same wind speed.

[0018] Optionally, the blade extends along the width direction of the shell, the width of the blade is L, and the thickness of the blade is K, wherein 10 mm ≤ L ≤ 50 mm, and / or 1 mm ≤ K ≤ 5 mm.

[0019] The cooking utensil exhaust assembly of the embodiment of the present invention effectively avoids the blades being too light to play a good sealing role by setting the blade width to be greater than or equal to 10 mm and the thickness to be greater than or equal to 1 mm. By setting the blade width to be less than or equal to 50 mm and the thickness to be less than or equal to 5 mm, it effectively avoids the blades being too heavy to meet the exhaust requirements at low wind speeds.

[0020] Optionally, a plurality of through holes are provided on the blade, and / or the blade is spaced apart from a portion of the inner wall surface of the exhaust hole.

[0021] The cooking utensil exhaust assembly of the embodiment of the present invention is provided with a plurality of through holes on the blades, and / or the blades are spaced apart from a portion of the inner wall surface of the exhaust hole. When the airflow velocity in the exhaust passage is low, the airflow can always be discharged to the outside through the through holes and / or the gaps between the blades and the inner wall surface of the exhaust hole, thereby effectively ensuring the smooth discharge of the hot and humid gas in the cooking cavity.

[0022] Optionally, on a projection plane perpendicular to the extension direction of the exhaust hole, the area of ​​the projected outer contour of the exhaust hole is S1, and the area of ​​the projection of the blade when not subjected to external force is S2, wherein 60%≤S2 / S1≤85%.

[0023] The cooking utensil exhaust assembly of the embodiment of the present invention, by setting S2 / S1 to be greater than or equal to 60%, avoids excessive loss of food aroma substances due to excessive ventilation area at the exhaust hole when the blades are not blown by the airflow, thereby effectively ensuring the user experience. By setting S2 / S1 to be less than or equal to 85%, it is effectively avoided that the blade area accounts for too large a proportion, thereby effectively preventing the pressure inside the cooking cavity from increasing and causing danger when the blades are completely closed and cannot be opened.

[0024] Optionally, the shell includes an upper cover body and a lower cover body connected to each other, the upper cover body and the lower cover body are formed around the exhaust channel, the upper cover body is provided with the exhaust hole, the side of the lower cover body facing away from the upper cover body is formed around a part of the cooking cavity, and the lower cover body is provided with an air outlet hole connecting the exhaust channel and the cooking cavity.

[0025] In the exhaust assembly of the cooking appliance of the embodiment of the present invention, the gas in the cooking cavity enters the exhaust channel through the air outlet hole and is then discharged to the outside through the exhaust hole. The housing is divided into an upper cover body and a lower cover body, so that a cooling fan can be installed in the exhaust channel formed around the upper cover body and the lower cover body, which is convenient for cooling the motor and makes the cooking device compact.

[0026] The cooking appliance according to an embodiment of the present invention comprises a motor, a hot air fan, a cooking cavity and a cooking appliance exhaust assembly as described in any one of the above embodiments, wherein the body of the motor is installed on a side of the shell facing away from the cooking cavity, the hot air fan is located in the cooking cavity and is coaxially connected to the motor shaft of the motor.

[0027] The technical advantages of the cooking appliance according to the embodiment of the present invention are the same as the technical advantages of the cooking appliance exhaust assembly of the above-mentioned embodiment, which will not be described in detail here.

[0028] The exhaust control method of a cooking appliance according to an embodiment of the present invention comprises the following steps:

[0029] Starting the motor, and controlling the speed of the motor to be n1 before the temperature in the cooking cavity reaches the first target temperature;

[0030] When the temperature in the cooking cavity reaches the second target temperature, the speed of the motor is controlled to be n2, wherein the second target temperature is greater than or equal to the first target temperature, and n2≤n1-100rpm.

[0031] The exhaust control method of the cooking appliance according to the embodiment of the present invention has the same technical advantages as the cooking appliance in the above embodiment, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of a cooking appliance according to an embodiment of the present invention.

[0033] Figure 2is a schematic diagram of a cooking appliance exhaust assembly according to an embodiment of the present invention.

[0034] Figure 3 is a side view of a cooking appliance exhaust assembly according to an embodiment of the present invention.

[0035] Figure 4 is a cross-sectional view of a cooking appliance exhaust assembly according to an embodiment of the present invention.

[0036] Figure 5 yes Figure 4 A is an enlarged view of the middle image.

[0037] Figure 6 is a front view of a cooking appliance exhaust assembly according to an embodiment of the present invention, wherein the vanes are in a fully closed position.

[0038] Figure 7 is another front view of a cooking appliance exhaust assembly according to an embodiment of the present invention, wherein the vanes are in an open position.

[0039] Figure 8 is an exploded view of a cooking appliance exhaust assembly according to an embodiment of the present invention.

[0040] Fig. 9 is another exploded view of a cooking appliance exhaust assembly according to an embodiment of the present invention.

[0041] Fig.10 is a schematic diagram of a blade in a cooking appliance exhaust assembly according to an embodiment of the present invention.

[0042] Reference numerals:

[0043] 1. Shell; 11. Upper cover; 111. Exhaust hole; 112. Connecting plate; 113. Connecting hole; 114. Notch; 115. First protrusion; 12. Lower cover; 121. Air outlet; 13. Exhaust channel; 2. Blades; 21. Rotating shaft; 22. Mounting groove; 23. Through hole; 3. Motor; 4. Hot air fan; 5. Cooling fan; 6. Cooking cavity. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0045] Combine the following Figure 1-Figure 10 A cooking appliance exhaust assembly according to an embodiment of the present invention is described.

[0046] The cooking utensil exhaust assembly of the embodiment of the present invention comprises a housing 1 and a blade 2. An exhaust passage 13 is provided in the housing 1, and an exhaust hole 111 communicating with the exhaust passage 13 is provided on the housing 1. The blade 2 is located in the exhaust hole 111 and is pivotally connected to the housing 1. The blade 2 can rotate relative to the housing 1 under the blowing of the airflow in the exhaust passage 13.

[0047] According to the exhaust assembly of the cooking appliance of the embodiment of the present invention, by setting a blade 2 in the exhaust hole 111 on the shell 1, and making the blade 2 pivotally connected to the shell 1, when the airflow in the exhaust channel 13 is discharged to the outside through the exhaust hole 111, the blade 2 will rotate relative to the shell 1 under the blowing of the airflow to change the ventilation area at the exhaust hole 111, that is, the faster the airflow velocity in the exhaust channel 13, the greater the swing amplitude of the blade 2, the larger the ventilation area exposed at the exhaust hole 111, and the more exhaust volume per unit time. At this time, when cooking food, the wind pressure in the cooking cavity 6 can be reduced in the setting stage to reduce the airflow velocity in the exhaust channel 13, thereby achieving the purpose of reducing the exhaust volume, effectively preventing most of the aroma components in the cooking cavity 6 from being discharged from the cooking cavity 6, and the food has a higher fragrance and taste after cooking, and the user satisfaction is higher.

[0048] It should be noted that, taking the cooking appliance as an air fryer as an example, the rotation speed of the hot air fan 4 is increased by increasing the rotation speed of the motor 3, thereby achieving the purpose of increasing the wind pressure in the cooking cavity 6.

[0049] In some embodiments, a rotating shaft 21 is provided on one of the housing 1 and the blade 2, and a connecting hole 113 is provided on the other of the housing 1 and the blade 2. The axial direction of the rotating shaft 21 is parallel to the height direction of the housing 1 ( Figure 2 The rotating shaft 21 is loosely fitted in the connecting hole 113 , and the blade 2 can pivot relative to the housing 1 around the central axis of the rotating shaft 21 .

[0050] By setting a clearance fit between the rotating shaft 21 and the connecting hole 113, the blade 2 can rotate relative to the housing 1 more labor-savingly, thereby preventing the internal hot and humid gas from being discharged poorly when the wind pressure in the cooking cavity 6 is low, resulting in the food not being crispy enough. At the same time, by setting the axial direction of the rotating shaft 21 to be a horizontal direction perpendicular to the height direction of the housing 1, the blade 2 can remain in a vertical state under the action of gravity, so as to achieve the maximum shielding of the exhaust hole 111.

[0051] Specifically, the axial direction of the rotating shaft 21 is consistent with the width direction of the housing 1, and is perpendicular to the extension direction of the exhaust hole 111 ( Figure 2 On the projection surface (in the front-to-back direction), the projection area of ​​blade 2 is the largest when it is not blown by the airflow.

[0052] In some embodiments, Figure 5 , Figure 8 and Fig. 9As shown, a rotating shaft 21 is provided at the upper end of the blade 2, a connecting hole 113 is provided on the shell 1, and a notch 114 is also provided on the shell 1. The notch 114 extends along the radial direction of the connecting hole 113 to the inner circumferential surface of the connecting hole 113. The minimum width of the notch 114 is smaller than the diameter of the rotating shaft 21, and the rotating shaft 21 is suitable for fitting into the connecting hole 113 through the notch 114.

[0053] By providing a notch 114 connected to the connection hole 113 on the housing 1, the rotating shaft 21 is adapted to press the housing 1 to deform when passing through the notch 114 so as to smoothly enter the connection hole 113, thereby completing the pivot connection between the blade 2 and the housing 1, and the blade 2 can be conveniently and quickly disassembled from the housing 1. In addition, by providing the rotating shaft 21 at the upper end of the blade 2, it is effectively prevented that the blade 2 cannot be reset when the rotation angle is too large under the blowing of the airflow.

[0054] Specifically, Figure 5 As shown, the notch 114 is arranged above the connecting hole 113 , and the width of the notch 114 gradually increases radially outward from the connecting hole 113 . The maximum width of the notch 114 may be greater than the diameter of the rotating shaft 21 , thereby further improving the assembly efficiency of the blade 2 on the shell 1 .

[0055] In some embodiments, Figure 8-Figure 10 As shown, a connecting plate 112 extending in the height direction of the housing 1 is provided in the exhaust hole 111, and the connecting plate 112 is located at the width direction of the housing 1 ( Figure 2 A connecting hole 113 is provided on the connecting plate 112 at the center position of the connecting plate 112 (in the left-right direction). A mounting groove 22 is provided on the upper end surface of the blade 2. The mounting groove 22 penetrates the blade 2 along the thickness direction of the blade 2. The width of the mounting groove 22 is greater than the thickness of the connecting plate 112. The rotating shaft 21 is arranged in the mounting groove 22.

[0056] By setting a connecting plate 112 at the center position of the exhaust hole 111 in the width direction of the shell 1, the blade 2 is pivotally connected to the connecting plate 112, which better reduces the probability of the blade 2 contacting the inner wall surface of the exhaust hole 111 and makes the rotation of the blade 2 smoother.

[0057] Specifically, the thickness direction of the connecting plate 112 is consistent with the width direction of the housing 1. A convex plate is extended from the rear end of the connecting plate 112, and a connecting hole 113 and a notch 114 are provided on the convex plate. When there are multiple blades 2 and they are arranged along the height direction of the housing 1, multiple convex plates are provided accordingly and are arranged at intervals along the height direction of the housing 1.

[0058] In some embodiments, a plurality of first protrusions 115 are disposed on the inner circumference of the connection hole 113 , or a plurality of second protrusions are disposed on the outer circumference of the rotation shaft 21 .

[0059] The provision of the first protrusion 115 and / or the second protrusion effectively reduces the contact area between the rotating shaft 21 and the shell 1, the sliding friction between the two is lower, the blade 2 rotates more smoothly, and it is more conducive to the exhaust of the hot and humid gas in the cooking cavity 6.

[0060] like Figure 5 As shown, the inner circumference of the connection hole 113 is provided with a plurality of first protrusions 115 , and the first protrusions 115 are evenly distributed on the inner circumference of the connection hole 113 . The first protrusions 115 are hemispherical protrusions, and their outer surfaces are spherical.

[0061] In some embodiments, there are multiple blades 2 and they are arranged in sequence along the height direction of the housing 1 . And / or, the blade 2 is an arc-shaped plate with a middle portion bent away from the exhaust passage 13 .

[0062] By providing a plurality of blades 2, on the basis of a certain cross-sectional area of ​​the exhaust hole 111, a single blade 2 is smaller in size, lighter in weight, and easier to rotate at a larger angle to ensure smooth exhaust of the hot and humid gas in the cooking cavity 6. And / or, by providing the blade 2 as an outwardly convex arc plate, the windward area of ​​the blade 2 is larger, and thus the rotation sensitivity of the blade 2 is higher at the same wind speed.

[0063] Specifically, Figure 1-Figure 4 and Figure 8 As shown, there are three blades 2, the three blades 2 are of the same size, and the blades 2 are rectangular flat plates. Fig. 9 and Fig.10 As shown, the windward surface of the blade 2 is a curved surface, and the extension direction of the central axis of the circumferential surface where the curved surface is located is consistent with the height direction of the shell 1.

[0064] In some embodiments, the blade 2 extends along the width direction of the shell 1 , the width of the blade 2 is L, and the thickness of the blade 2 is K, wherein 10 mm≤L≤50 mm, and / or 1 mm≤K≤5 mm.

[0065] By setting the width of blade 2 to be greater than or equal to 10 mm and the thickness to be greater than or equal to 1 mm, it is effectively prevented that blade 2 is too light to play a good sealing role. By setting the width of blade 2 to be less than or equal to 50 mm and the thickness to be less than or equal to 5 mm, it is effectively prevented that blade 2 is too heavy to meet the exhaust requirements when the wind speed is low.

[0066] Specifically, Figure 8 As shown, the blade 2 is a rectangular plate, the width direction of the blade 2 is consistent with the height direction of the housing 1, and the width of the blade 2 can be 10 mm, 30 mm, and 50 mm. The thickness of the blade 2 can be 1 mm, 3 mm, and 5 mm.

[0067] In some embodiments, a plurality of through holes 23 are provided on the blade 2 , and / or the blade 2 is spaced apart from a portion of the inner wall surface of the exhaust hole 111 .

[0068] By arranging a plurality of through holes 23 on the blade 2, and / or arranging a portion of the inner wall surface of the blade 2 and the exhaust hole 111 to be separated, when the air flow velocity in the exhaust channel 13 is low, the air flow can always be discharged to the outside through the through holes 23 and / or the gap between the blade 2 and the inner wall surface of the exhaust hole 111, thereby effectively ensuring the smooth discharge of the hot and humid gas in the cooking cavity 6.

[0069] Specifically, Figure 6 and Figure 7 As shown, the blade 2 is spaced apart from the inner wall surface of the exhaust hole 111. Fig.10 As shown, a plurality of through holes 23 are provided on the blade 2 , and the plurality of through holes 23 are discretely arranged on the blade 2 .

[0070] In some embodiments, on a projection plane perpendicular to the extension direction of the exhaust hole 111 , the area of ​​the projected outer contour of the exhaust hole 111 is S1 , and the area of ​​the projection of the blade 2 when not subjected to external force is S2 , wherein 60%≤S2 / S1≤85%.

[0071] By setting S2 / S1 to be greater than or equal to 60%, it is prevented that the ventilation area at the exhaust hole 111 is too large when the blade 2 is not blown by the airflow, resulting in excessive loss of food aroma substances, and the user experience is effectively guaranteed. By setting S2 / S1 to be less than or equal to 85%, it is effectively prevented that the area of ​​the blade 2 is too large, and thus effectively prevents the pressure inside the cooking cavity 6 from increasing when the blade 2 is completely closed and cannot be opened, causing danger.

[0072] Specifically, Figure 6 As shown, when the blades 2 are not acted upon by external forces, the blades 2 are generally arranged upright, and their shielding area for the exhaust hole 111 is the largest. The ratio of the total shielding area of ​​the three blades 2 to the projected outer contour area of ​​the exhaust hole 111 can be 60%, 70% and 85%.

[0073] In some embodiments, the shell 1 includes an upper cover body 11 and a lower cover body 12 connected to each other, the upper cover body 11 and the lower cover body 12 surround the molded exhaust channel 13, the upper cover body 11 is provided with an exhaust hole 111, the side of the lower cover body 12 facing away from the upper cover body 11 surrounds the molded part of the cooking cavity 6, and the lower cover body 12 is provided with an air outlet hole 121 connecting the exhaust channel 13 and the cooking cavity 6.

[0074] The gas in the cooking cavity 6 enters the exhaust passage 13 through the air outlet 121, and then is exhausted to the outside through the exhaust hole 111. The housing 1 is divided into an upper cover 11 and a lower cover 12, so that the cooling fan 5 can be installed in the exhaust passage 13 formed between the upper cover 11 and the lower cover 12, which is convenient for cooling the motor 3 and makes the cooking device compact.

[0075] like Figure 1As shown, the upper cover body 11 is connected to the top of the lower cover body 12, and a motor 3 is installed above the upper cover body 11. The motor shaft of the motor 3 passes through the upper cover body 11 and the lower cover body 12 in sequence and is coaxially connected to the hot air fan 4 located in the cooking cavity 6. The part of the motor shaft located in the exhaust channel 13 is connected to the cooling fan 5, and the upper cover body 11 is distributed between the body of the motor 3 and the cooling fan 5. Cooling holes are also provided.

[0076] The cooking appliance according to an embodiment of the present invention comprises a motor 3, a hot air fan 4, a cooking cavity 6 and a cooking appliance exhaust assembly as in any of the above embodiments, wherein the body of the motor 3 is mounted on a side of the shell 1 facing away from the cooking cavity 6, the hot air fan 4 is located in the cooking cavity 6 and is coaxially connected to the motor shaft of the motor 3.

[0077] The technical advantages of the cooking appliance according to the embodiment of the present invention are the same as the technical advantages of the cooking appliance exhaust assembly of the above-mentioned embodiment, which will not be described in detail here.

[0078] The exhaust control method of a cooking appliance according to an embodiment of the present invention comprises the following steps:

[0079] Starting the motor 3, and before the temperature in the cooking cavity 6 reaches the first target temperature, controlling the speed of the motor 3 to be n1;

[0080] When the temperature in the cooking cavity 6 reaches the second target temperature, the speed of the motor 3 is controlled to be n2, wherein the second target temperature is greater than or equal to the first target temperature, and n2≤n1-100rpm.

[0081] The exhaust control method of the cooking appliance according to the embodiment of the present invention has the same technical advantages as the cooking appliance in the above embodiment, which will not be described in detail here.

[0082] Specifically, taking the cooking utensil as an air fryer as an example, when cooking food in the cooking cavity 6, it is divided into an early heating / dehumidification stage and a mid-to-late temperature maintenance and fragrance enhancement stage. Among them, the early heating / dehumidification stage is a heating stage, and the cooking cavity 6 gradually heats up from room temperature to the first target temperature. At the same time, the temperature inside the food also gradually rises, and the moisture of the food itself evaporates continuously, so a large amount of hot and humid gas will be formed. Therefore, it is necessary to increase the dehumidification speed of the food to lay the foundation for the crispy coloring of the food in the next stage. At this time, the speed of the motor 3 is n1, and the blades 2 at the exhaust hole 111 are opened at a large angle or fully opened, which is conducive to dehumidification.

[0083] During the temperature maintenance and aroma enhancement stage, the temperature of the cooking cavity 6 is further increased to the second target temperature. At this temperature, a large amount of sugars, starches, proteins, oils and other ingredients in the food undergo complex steps such as dehydration, oxidation, cyclization, and cracking at high temperature, resulting in a large number of Maillard reactions and caramelization reactions, forming a large number of flavor substances. At this time, the speed is reduced to n2. At this stage, the exhaust hole 111 needs to reduce the exhaust area and reduce the exhaust volume, so that most of the aroma components can be retained inside the cooking cavity 6, thereby improving the aroma of the food after cooking. In the above scheme, n1≥n2+100rpm, the first target temperature is less than or equal to the second target temperature, and the exhaust volume can be reduced by reducing the area of ​​the exhaust hole 111. Since the exhaust hole 111 is not a completely closed structure, a certain exhaust volume is always maintained to ensure continuous dehumidification and a crispy taste. At the same time, the smaller exhaust hole 111 can keep the food crispy while ensuring that the taste is not too dry and firewood, achieving a state of crispy outside and tender inside.

[0084] It should be noted that the opening angle α of the blade 2 is affected by the airflow velocity in the exhaust channel 13, and the airflow velocity is affected by the speed of the motor 3. Therefore, under the same cooling fan 5 and air duct structure, the faster the speed of the motor 3, the larger the opening angle of the blade 2. According to actual verification, the relationship between the speed and α is approximately as shown in the following table:

[0085] Speed / rpm ≤1500 1500～2000 2000～2500 2500～3000 ≥3000 Angle α ≤20° 20°～40° 40°-60° 60°-80° ≥80°

[0086] The data in the above table only show the corresponding relationship between the rotation speed of the motor 3 and the opening angle α of the blade 2 in the structure of this embodiment. When the structural weight of the blade 2 or the motor 3, the cooling fan 5, the air duct and other related structures change, the corresponding relationship also changes accordingly, but the positive proportional relationship that the larger the rotation speed of the motor 3, the larger the angle of the blade 2 remains unchanged.

[0087] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0088] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0091] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0092] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A cooking appliance exhaust assembly, characterized in that: include: A shell (1), wherein an exhaust passage (13) is provided in the shell (1), and an exhaust hole (111) communicating with the exhaust passage (13) is provided on the shell (1); A blade (2), the blade (2) is located in the exhaust hole (111) and is pivotally connected to the shell (1), and the blade (2) can rotate relative to the shell (1) under the blowing of the airflow in the exhaust channel (13).

2. The cooking appliance exhaust assembly according to claim 1, characterized in that: A rotating shaft (21) is provided on one of the shell (1) and the blade (2), and a connecting hole (113) is provided on the other of the shell (1) and the blade (2). The axial direction of the rotating shaft (21) is perpendicular to the height direction of the shell (1), the rotating shaft (21) is loosely fitted in the connecting hole (113), and the blade (2) is pivotable relative to the shell (1) around the central axis of the rotating shaft (21).

3. The cooking appliance exhaust assembly according to claim 2, characterized in that: The upper end of the blade (2) is provided with the rotating shaft (21), the shell (1) is provided with the connecting hole (113), and the shell (1) is also provided with a notch (114), the notch (114) extending along the radial direction of the connecting hole (113) to the inner circumferential surface of the connecting hole (113), the minimum width of the notch (114) is smaller than the diameter of the rotating shaft (21), and the rotating shaft (21) is suitable for fitting into the connecting hole (113) through the notch (114).

4. The cooking appliance exhaust assembly according to claim 3, characterized in that: A connecting plate (112) extending in the height direction of the shell (1) is provided in the exhaust hole (111); the connecting plate (112) is located at the center of the exhaust hole (111) in the width direction of the shell (1); and the connecting hole (113) is provided on the connecting plate (112); The upper end surface of the blade (2) is provided with a mounting groove (22), the mounting groove (22) penetrates the blade (2) along the thickness direction of the blade (2), the width of the mounting groove (22) is greater than the thickness of the connecting plate (112), and the rotating shaft (21) is arranged in the mounting groove (22).

5. The cooking appliance exhaust assembly according to claim 2, characterized in that: The inner circumferential surface of the connection hole (113) is provided with a plurality of first protrusions (115), or the outer circumferential surface of the rotating shaft (21) is provided with a plurality of second protrusions.

6. The cooking appliance exhaust assembly according to claim 1, characterized in that: The blades (2) are in plurality and are arranged in sequence along the height direction of the shell (1); And / or, the blade (2) is an arc-shaped plate with a middle portion bent in a direction away from the exhaust passage (13).

7. The cooking appliance exhaust assembly according to claim 1, characterized in that: The blade (2) extends along the width direction of the shell (1), the width of the blade (2) is L, and the thickness of the blade (2) is K, wherein 10 mm ≤ L ≤ 50 mm, and / or 1 mm ≤ K ≤ 5 mm.

8. The cooking appliance exhaust assembly according to any one of claims 1 to 7, characterized in that: The blade (2) is provided with a plurality of through holes (23), and / or the blade (2) is spaced apart from a portion of the inner wall surface of the exhaust hole (111).

9. The cooking appliance exhaust assembly according to claim 8, characterized in that: On a projection plane perpendicular to the extension direction of the exhaust hole (111), the area of ​​the projected outer contour of the exhaust hole (111) is S1, and the projected area of ​​the blade (2) when not subjected to external force is S2, wherein 60%≤S2 / S1≤85%.

10. The cooking appliance exhaust assembly according to claim 1, wherein: The shell (1) comprises an upper cover (11) and a lower cover (12) connected to each other, wherein the upper cover (11) and the lower cover (12) surround and mold the exhaust passage (13), the upper cover (11) is provided with the exhaust hole (111), the lower cover (12) surrounds and molds a portion of the cooking cavity (6) on a side away from the upper cover (11), and the lower cover (12) is provided with an air outlet hole (121) connecting the exhaust passage (13) and the cooking cavity (6).

11. A cooking utensil, characterized in that: The cooking appliance comprises a motor (3), a hot air fan (4), a cooking cavity (6), and a cooking appliance exhaust assembly according to any one of claims 1 to 10, wherein the body of the motor (3) is mounted on a side of the housing (1) facing away from the cooking cavity (6), and the hot air fan (4) is located in the cooking cavity (6) and is coaxially connected to the motor (3) shaft of the motor (3).

12. A method for controlling exhaust gas of a cooking appliance, characterized in that: The following steps are involved: Starting the motor (3), and controlling the speed of the motor (3) to n1 before the temperature in the cooking chamber (6) reaches a first target temperature; When the temperature in the cooking cavity (6) reaches a second target temperature, the rotation speed of the motor (3) is controlled to be n2, wherein the second target temperature is greater than or equal to the first target temperature, and n2≤n1-100rpm.

Images