Centrifugal fan, oil smoke treatment device, integrated cooker and control method of centrifugal fan

Abstract

The embodiment of the invention provides a centrifugal fan, an oil smoke treatment device, an integrated cooker and a control method of the centrifugal fan, and relates to the technical field of cooking equipment. The centrifugal fan comprises a volute body, an elastic structure and a driving mechanism, the volute body is provided with a volute inlet and a volute outlet, an airflow channel is formed between the volute inlet and the volute outlet, the elastic structure is connected with the volute body, and the driving mechanism is connected with the elastic structure. External force is applied to the elastic structure through the driving mechanism, the deformation state of the elastic structure is changed so as to adjust the airflow channel, and under the fixed gear of the centrifugal fan, when the environment wind resistance changes or the smoke exhaust air volume requirement changes, the air volume at the volute outlet of the centrifugal fan can be adjusted by adjusting the airflow channel. And therefore, the working condition adaptability of the whole machine can be improved, and the integrated cooker can give consideration to various use working conditions.

Description

Technical Field

[0001] This application relates to the field of cooking equipment technology, and in particular to a centrifugal fan, an oil fume treatment device, an integrated stove, and a control method for the centrifugal fan. Background Technology

[0002] An integrated cooktop is a kitchen appliance that integrates multiple functions into one unit, such as a combination of "fume hood + cooktop + storage", "fume hood + cooktop + disinfection", or "fume hood + cooktop + steaming / baking".

[0003] In related technologies, integrated cooktops include a fume extraction device, which uses a centrifugal fan to perform fume extraction. The inlet area of ​​the centrifugal fan's casing has a fixed protrusion structure to prevent airflow backflow.

[0004] However, when the centrifugal fan is in a fixed position, the airflow at the outlet of the centrifugal fan casing cannot be adjusted when the ambient wind resistance or the demand for exhaust airflow changes, resulting in poor adaptability of the whole machine to the operating conditions. Summary of the Invention

[0005] This application provides a centrifugal fan, a fume treatment device, an integrated stove, and a control method for the centrifugal fan, in order to solve the problem that when the ambient wind resistance or the demand for exhaust air volume changes under the fixed setting of the centrifugal fan, the air volume at the outlet of the centrifugal fan casing cannot be adjusted, resulting in poor adaptability of the whole machine to the operating conditions.

[0006] In a first aspect, embodiments of this application provide a centrifugal fan, comprising:

[0007] The volute body has a volute inlet and a volute outlet, and an airflow channel is formed between the volute inlet and the volute outlet;

[0008] An elastic structure is connected to the volute body;

[0009] A drive mechanism connected to the elastic structure, the drive mechanism being configured to apply an external force to the elastic structure to change the deformation state of the elastic structure in order to adjust the airflow channel.

[0010] In one possible implementation, the system further includes an impeller disposed within the volute body, and the elastic structure is disposed on at least one surface of the volute body in the thickness direction of the centrifugal fan. In the radial direction of the impeller, the elastic structure is disposed on the outer side of the impeller.

[0011] In one possible implementation, the elastic structure is arranged around the circumference of the impeller.

[0012] In one possible implementation, the elastic structure includes a first elastic element, the volute body has a first surface in the thickness direction of the centrifugal fan, the first surface is provided with a first mounting opening, the first elastic element is bonded to the first surface, and the first elastic element covers the first mounting opening; and / or,

[0013] The elastic structure includes a second elastic element. The volute body has a second surface in the thickness direction of the centrifugal fan that is opposite to the first surface. The second surface is provided with a second mounting port. The second elastic element is bonded to the second surface and covers the second mounting port.

[0014] In one possible implementation, the drive mechanism includes a drive assembly and a lifting member. The drive assembly is mounted on the volute body and connected to the lifting member. The lifting member is disposed on the side of the elastic structure opposite to the interior of the volute body in the thickness direction of the centrifugal fan.

[0015] In one possible implementation, the drive assembly includes a base, a drive motor, and a lead screw. The base is mounted on the volute body, the drive motor is mounted on the base, and the lead screw connects the drive motor and the lifting component.

[0016] In one possible implementation, an airflow sensor is provided at the outlet of the volute, the airflow sensor being used to collect the airflow at the outlet of the volute body.

[0017] Secondly, embodiments of this application provide an oil fume treatment device, including the centrifugal fan described in the first aspect.

[0018] Thirdly, embodiments of this application provide an integrated stove, including the oil fume treatment device described in the second aspect.

[0019] Fourthly, embodiments of this application provide a control method for a centrifugal fan, comprising:

[0020] In response to the start command, the drive mechanism of the centrifugal fan is controlled to apply an external force to the elastic structure of the centrifugal fan to change the deformation state of the elastic structure and adjust the airflow channel of the centrifugal fan.

[0021] In one possible implementation, the drive mechanism includes a drive assembly and a lifting component;

[0022] The response to the start command controls the drive mechanism of the centrifugal fan to apply an external force to the elastic structure of the centrifugal fan, thereby changing the deformation state of the elastic structure and adjusting the airflow channel, including:

[0023] Respond to the start command and obtain the initial air volume;

[0024] Obtain the movement range of the lifting component;

[0025] The lifting component is controlled to move to various preset positions within the moving range to apply external force to the elastic structure, thereby changing the deformation state of the elastic structure to various deformation states and obtaining the air volume of each first deformation state corresponding to each deformation state.

[0026] The maximum air volume is determined from the initial air volume and the air volume of each first deformation state, and the state of the elastic structure corresponding to the maximum air volume is determined as the first target state.

[0027] The position to which the lifting component is moved corresponding to the first target deformation state is determined as the first target position;

[0028] The lifting component is controlled to move to the first target position to apply an external force to the elastic structure of the centrifugal fan, thereby changing the deformation state of the elastic structure and adjusting the airflow channel.

[0029] In one possible implementation, the drive mechanism includes a drive assembly and a lifting component;

[0030] The response to the start command controls the drive mechanism of the centrifugal fan to apply an external force to the elastic structure of the centrifugal fan, thereby changing the deformation state of the elastic structure and adjusting the airflow channel, including:

[0031] Respond to the start command, obtain the user-inputted airflow setting value, and the initial airflow;

[0032] Determine whether the set airflow value is equal to the initial airflow;

[0033] If the air volume setting value is not equal to the initial air volume, then the movement range of the lifting component is obtained;

[0034] The lifting component is controlled to move to various preset positions within the moving range to apply external force to the elastic structure, thereby changing the deformation state of the elastic structure to various deformation states and obtaining the air volume of each second deformation state corresponding to each deformation state.

[0035] From the initial air volume and the air volume of each of the second deformation states, determine the air volume with the smallest absolute value of the difference from the air volume set value;

[0036] The airflow with the smallest absolute value of the difference from the airflow set value is determined as the third airflow, and the state of the elastic structure under the third airflow is determined as the second target state.

[0037] The position to which the lifting component corresponding to the second target state is moved is determined as the second target position;

[0038] The lifting component is controlled to move to the second target position to apply an external force to the elastic structure of the centrifugal fan, thereby changing the deformation state of the elastic structure and adjusting the airflow channel.

[0039] In one possible implementation, determining whether the set airflow value is equal to the initial airflow further includes:

[0040] If the set air volume is equal to the initial air volume, the drive mechanism of the centrifugal fan is controlled to maintain the current position.

[0041] This application provides a centrifugal fan, a fume treatment device, an integrated stove, and a control method for the centrifugal fan. By applying external force to the elastic structure through a drive mechanism, the deformation state of the elastic structure is changed to adjust the airflow channel. Under the fixed gear of the centrifugal fan, when the environmental wind resistance or the demand for exhaust air volume changes, the air volume at the outlet of the centrifugal fan casing can be adjusted by adjusting the airflow channel, thereby improving the adaptability of the whole machine to various operating conditions, so that the integrated stove can take into account a variety of operating conditions. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram of a centrifugal fan provided in this application embodiment. Figure 1 ;

[0044] Figure 2 for Figure 1 Schematic diagram of centrifugal fan in the middle Figure 2 ;

[0045] Figure 3 for Figure 1 A top view of the centrifugal fan after the drive mechanism has been removed. Figure 1 ;

[0046] Figure 4 for Figure 1 Top view of the centrifugal fan after removing the elastic structure and drive mechanism. Figure 1 ;

[0047] Figure 5 for Figure 1A top view of the centrifugal fan after the drive mechanism has been removed. Figure 2 ;

[0048] Figure 6 for Figure 1 Top view of the centrifugal fan after removing the elastic structure and drive mechanism. Figure 2 ;

[0049] Figure 7 This application provides an exploded view of a drive mechanism according to an embodiment;

[0050] Figure 8 for Figure 7 A schematic diagram showing the connection between the lead screw and the lifting component;

[0051] Figure 9 for Figure 1 A schematic diagram of the centrifugal fan in its first state;

[0052] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0053] Figure 11 for Figure 9 Enlarged view of point B in the middle;

[0054] Figure 12 for Figure 1 A schematic diagram of the centrifugal fan in its second state;

[0055] Figure 13 for Figure 12 Enlarged view of point C in the middle;

[0056] Figure 14 for Figure 12 Enlarged view of point D in the middle;

[0057] Figure 15 for Figure 1 A schematic diagram of the centrifugal fan in its third state;

[0058] Figure 16 for Figure 15 Enlarged view of point E in the middle;

[0059] Figure 17 for Figure 15 Enlarged view of point F in the middle;

[0060] Figure 18 The present application provides a flowchart of a centrifugal fan control method. Figure 1 ;

[0061] Figure 19 The present application provides a flowchart of a centrifugal fan control method. Figure 2 ;

[0062] Figure 20 The present application provides a flowchart of a centrifugal fan control method. Figure 3 .

[0063] Explanation of reference numerals in the attached figures:

[0064] 10. Volute body; 101. Volute inlet; 102. Volute outlet; 103. First surface; 104. Second surface; 1031. First mounting port; 1041. Second mounting port; 20. Elastic structure; 201. First elastic element; 202. Second elastic element; 30. Drive mechanism; 31. Base; 32. Drive motor; 33. Lead screw; 34. Lifting component; 40. Impeller; 50. Air volume sensor. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0068] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] In related technologies, when the centrifugal fan is set to a fixed position, the raised structure cannot move when the environmental wind resistance or the required exhaust air volume changes. This prevents the airflow channel from being adjusted and the air volume at the outlet of the centrifugal fan's volute from being regulated, resulting in poor adaptability of the entire unit. Research has found that this problem arises because the exhaust pipe of integrated stoves is usually connected to the common flue of the residential building. When only one user in the same building uses the integrated stove, the environmental wind resistance of the common flue is the initial wind resistance. When the user and other residents in the same building use the integrated stove simultaneously, the environmental wind resistance of the common flue increases compared to the initial wind resistance. This causes a significant decrease in the air volume at the outlet of the centrifugal fan's volute at the fixed position, resulting in low oil fume exhaust efficiency. Consequently, the entire unit cannot adapt to changes in environmental wind resistance, leading to poor adaptability of the entire unit.

[0071] Integrated cooktops have varying exhaust airflow requirements depending on the cooking scenario. When high exhaust airflow is needed (such as stir-frying or deep-frying), if the airflow at the outlet of the centrifugal fan at a fixed setting is lower than the actual demand, the exhaust speed of the fumes cannot keep up with the generation speed, resulting in low exhaust efficiency. This makes the entire unit unsuitable for changes in exhaust airflow requirements, leading to poor overall adaptability. Conversely, when low exhaust airflow is needed (such as steaming or keeping warm), if the airflow at the outlet of the centrifugal fan at a fixed setting is higher than the actual demand, it will continue to operate at high airflow without requiring high-power exhaust, resulting in energy waste. This also makes the entire unit unsuitable for changes in exhaust airflow requirements, leading to poor overall adaptability.

[0072] It should be noted that centrifugal fans include high, medium, and low speed settings. The power consumption of a centrifugal fan at the high speed setting is greater than that at the medium speed setting, and the power consumption of a centrifugal fan at the medium speed setting is greater than that at the low speed setting. A fixed speed setting for a centrifugal fan refers to one of the high, medium, or low speed settings.

[0073] To address the aforementioned issues, this application provides a centrifugal fan, a fume treatment device, an integrated stove, and a control method for the centrifugal fan. The method includes an elastic structure and a drive mechanism. The drive mechanism applies external force to the elastic structure, altering its deformation state to adjust the airflow channel. When environmental wind resistance or exhaust air volume requirements change, adjusting the airflow channel can regulate the airflow at the centrifugal fan's volute outlet, thereby improving the overall adaptability of the unit and enabling the integrated stove to accommodate various operating conditions.

[0074] The following detailed description, with reference to specific embodiments, illustrates the centrifugal fan, fume treatment device, integrated stove, and control method of the centrifugal fan provided in this application.

[0075] In a first aspect, embodiments of this application provide a centrifugal fan applied to an integrated stove's fume treatment device. The integrated stove includes a lower unit, a stove body, and a fan head assembly. The lower unit mainly provides storage cabinet space and space for installing the range hood, while the stove body mainly provides the burner for cooking. The fan head assembly is mainly used in conjunction with the range hood to generate negative pressure to remove the fumes generated during cooking.

[0076] See Figure 1 and Figure 2 The thickness direction of the centrifugal fan is the Z-direction. The centrifugal fan includes a volute body 10. The volute body 10 refers to the shell structure used to guide airflow from the inlet to the outlet. The volute body 10 is made of metal or plastic.

[0077] The volute body 10 is provided with a volute inlet 101 and a volute outlet 102, and an airflow channel is formed between the volute inlet 101 and the volute outlet 102. The airflow channel refers to the path through which airflow passes between the volute inlet 101 and the volute outlet 102.

[0078] The volute body 10 has a first surface 103 and a second surface 104 in the thickness direction of the centrifugal fan, and the volute inlet 101 is located on the first surface 103.

[0079] The centrifugal fan also includes an elastic structure 20, which is connected to the volute body 10. The elastic structure 20 can deform under external force and return to its initial state when the external force is removed.

[0080] It should be noted that the initial state of the elastic structure 20 is the state in which the elastic structure 20 is not subjected to any force.

[0081] The elastic structure 20 can be located on the first surface 103 of the volute body 10, or on the second surface 104 of the volute body 10, or on the first surface 103 and the second surface 104 of the volute body 10, or at other locations on the volute body 10, without any specific restrictions.

[0082] When the deformation state of the elastic structure 20 is changed by an external force, the airflow channel can be adjusted. Specifically, when the deformation state of the elastic structure 20 is changed by an external force, the cross-sectional area of ​​the airflow channel at the location of the elastic structure 20 can be adjusted.

[0083] Deformation state refers to the physical shape change of the elastic structure 20 after being subjected to external force, including but not limited to protrusions, depressions or local deformation.

[0084] In some examples, when the elastic structure 20 is compressed, it deforms inward toward the volute body 10 and forms a bulge, causing a change in the cross-sectional area of ​​the airflow channel at the location of the elastic structure 20. After the external force is removed, the elastic structure 20 returns to its flat state, that is, the elastic structure 20 returns to its initial state, causing the airflow channel to return to its initial state.

[0085] It should be noted that the initial state of the airflow channel is the state in which the airflow channel is located when the elastic structure 20 is not under force.

[0086] The elastic structure 20 can be made of silicone, rubber, or a polymer material with elastic properties. In this embodiment, the elastic structure 20 is made of silicone, the volute body 10 is made of metal, and the elastic structure 20 is bonded to the volute body 10.

[0087] The centrifugal fan also includes a drive mechanism 30, which is connected to the elastic structure 20. The drive mechanism 30 is configured to apply an external force to the elastic structure 20 to change the deformation state of the elastic structure 20 and adjust the airflow channel.

[0088] The drive mechanism 30 refers to a mechanical component that changes the deformation state of the elastic structure 20 through mechanical or electric means. For example, the power part of the drive mechanism 30 may include a motor, a cylinder, or a hydraulic cylinder.

[0089] In some examples, when the drive mechanism 30 applies an external force to the elastic structure 20, the elastic structure 20 is compressed and deforms inward toward the volute body 10, forming a protrusion. This causes a change in the cross-sectional area of ​​the airflow channel at the location of the elastic structure 20, thereby adjusting the airflow channel. When the exhaust airflow demand changes, this protrusion can adjust the airflow at the volute outlet 102 of the centrifugal fan by limiting the airflow outflow at the volute outlet 102. When the environmental wind resistance changes, this protrusion can adjust the airflow at the volute outlet 102 of the centrifugal fan by blocking the backflow of airflow at the volute outlet 102, preventing fluctuations in airflow due to backflow.

[0090] The centrifugal fan provided in this application embodiment applies external force to the elastic structure 20 through the drive mechanism 30, changing the deformation state of the elastic structure 20 to adjust the airflow channel. Under the fixed gear of the centrifugal fan, when the environmental wind resistance or the demand for exhaust air volume changes, the air volume at the volute outlet 102 of the centrifugal fan can be adjusted by adjusting the airflow channel, thereby improving the adaptability of the whole machine to various operating conditions, so that the integrated stove can take into account a variety of operating conditions.

[0091] In one possible implementation, the centrifugal fan further includes an impeller 40 (see...). Figure 1 The impeller 40 is disposed within the volute body 10, and the elastic structure 20 is disposed on at least one side of the surface of the volute body 10 in the thickness direction of the centrifugal fan. In the radial direction of the impeller 40, the elastic structure 20 is disposed on the outer side of the impeller 40. With this configuration, in the fixed position of the centrifugal fan, when the ambient wind resistance is at its initial value, when an external force is applied to the elastic structure 20 by the drive mechanism 30, the elastic structure 20 is compressed and deforms inward toward the volute body 10, forming a protrusion. This protrusion can fill the gap between the impeller 40 and the volute body 10, reducing airflow backflow losses caused by the negative pressure at the center of the impeller 40.

[0092] Among them, impeller 40 refers to the component in a centrifugal fan that rotates to generate airflow.

[0093] The volute body 10 has a receiving space inside to accommodate the impeller 40, and the impeller 40 can rotate within the receiving space.

[0094] In the radial direction of impeller 40, the outer side of impeller 40 is the spatial region outside the rotation trajectory of impeller 40 in the radial direction of impeller 40.

[0095] Filling refers to reducing or closing the gap between the impeller 40 and the volute body 10 in the thickness direction of the centrifugal fan by deforming the elastic structure 20.

[0096] In some examples, the elastic structure 20 is arranged around the circumference of the impeller 40. When the centrifugal fan is in a fixed position and the ambient wind resistance is the initial wind resistance, when an external force is applied to the elastic structure 20 via the drive mechanism 30, the elastic structure 20 is compressed, forming an annular protrusion towards the interior of the volute body 10. This annular protrusion fills the circumferential gap between the impeller 40 and the volute body 10, reducing airflow backflow losses caused by the negative pressure at the center of the impeller 40.

[0097] In one possible implementation, see Figure 3 and Figure 4 The elastic structure 20 includes a first elastic element 201. The volute body 10 has a first surface 103 in the thickness direction of the centrifugal fan. The first surface 103 is provided with a first mounting opening 1031. The first elastic element 201 is bonded to the first surface 103 and covers the first mounting opening 1031; and / or, see Figure 5 and Figure 6 The elastic structure 20 includes a second elastic element 202. The volute body 10 has a second surface 104 in the thickness direction of the centrifugal fan, which is opposite to the first surface 103. The second surface 104 is provided with a second mounting port 1041. The second elastic element 202 is bonded to the second surface 104 and covers the second mounting port 1041. With this configuration, the centrifugal fan can adjust the airflow channel from at least one side in its thickness direction.

[0098] The first elastic element 201 is made of silicone. The shape of the first elastic element 201 can be a square ring, a circular ring, or other shapes. In this embodiment, the first elastic element 201 is circular.

[0099] The first elastic element 201 can deform under external force and return to its initial state when the external force is removed. It should be noted that the initial state of the first elastic element 201 is the state in which the elastic structure 20 is not under force. In the initial state, the first elastic element 201 is flat and without protrusions on both sides in the thickness direction of the centrifugal fan.

[0100] The first mounting opening 1031 refers to the notch on the first surface 103 of the volute body 10. The shape of the first mounting opening 1031 is the same as the shape of the first elastic member 201. In this embodiment, the shape of the first mounting opening 1031 is annular. The first elastic member 201 seals the first mounting opening 1031 by covering it, thus preventing gas leakage at the first mounting opening 1031.

[0101] The second elastic element 202 is made of silicone. The shape of the second elastic element 202 can be a square ring, a circular ring, or other shapes. In this embodiment, the second elastic element 202 is circular.

[0102] The second elastic element 202 can deform under external force and return to its initial state when the external force is removed. It should be noted that the initial state of the second elastic element 202 is the state in which the elastic structure 20 is not under force. In the initial state, the second elastic element 202 is flat and without protrusions on both sides in the thickness direction of the centrifugal fan.

[0103] The second mounting opening 1041 refers to the notch on the second surface 104 of the volute body 10. The shape of the second mounting opening 1041 is the same as the shape of the second elastic member 202. In this embodiment, the shape of the second mounting opening 1041 is annular. The second elastic member 202 covers the second mounting opening 1041, thereby sealing the second mounting opening 1041 and preventing gas leakage at the second mounting opening 1041.

[0104] In this embodiment, the elastic structure 20 includes a first elastic element 201 and a second elastic element 202. In other embodiments, the elastic structure 20 may include only the first elastic element 201 or only the second elastic element 202.

[0105] In one possible implementation, see Figure 7 and Figure 8 The drive mechanism 30 includes a drive assembly and a lifting component 34. The drive assembly is mounted on the volute body 10 and connected to the lifting component 34. The lifting component 34 is located on the side of the elastic structure 20 facing away from the interior of the volute body 10 in the thickness direction of the centrifugal fan. With this configuration, the lifting component 34 is driven by the drive assembly, and the lifting component 34 applies an external force to the elastic structure 20. The elastic structure 20 is compressed and deforms inward toward the interior of the volute body 10, forming a protrusion to adjust the airflow channel. Under the fixed speed of the centrifugal fan, when the environmental wind resistance or the demand for exhaust air volume changes, the airflow at the volute outlet 102 of the centrifugal fan can be adjusted by adjusting the airflow channel, thereby improving the adaptability of the entire unit and enabling the integrated stove to accommodate various usage conditions.

[0106] The elastic structure 20 includes a first elastic element 201 and a second elastic element 202. The first elastic element 201 and the second elastic element 202 each correspond to a driving mechanism 30.

[0107] The drive assembly includes a base 31, a drive motor 32, and a lead screw 33. The base 31 is mounted on the volute body 10, the drive motor 32 is mounted on the base 31, and the lead screw 33 connects the drive motor 32 and the lifting component 34.

[0108] The base 31 is a supporting component used to mount the drive motor 32. The base 31 can be connected to the volute body 10 by means of bolts or welding. The base 31 is circular in shape.

[0109] The drive motor 32 is a motor used to provide power to the lead screw 33. There can be one or more drive motors 32. In this embodiment, there are four drive motors 32. All four drive motors 32 operate simultaneously.

[0110] The lead screw 33 is a transmission component in the drive mechanism 30 that converts rotary motion into linear motion. The number of lead screws 33 is equal to the number of drive motors 32.

[0111] The lifting component 34 moves along the thickness direction of the centrifugal fan under the drive of the lead screw 33. The lifting component 34 is annular in shape. In this embodiment, there are four drive motors 32 and four lead screws 33, which are equally spaced along the circumference of the lifting component 34. This arrangement ensures that the size of the annular protrusion formed by the elastic structure 20 remains consistent at all positions along the thickness direction of the centrifugal fan.

[0112] In some embodiments, the driving mechanism 30 corresponding to the first elastic member 201 is a first driving mechanism. The driving mechanism 30 corresponding to the second elastic member 202 is a second driving mechanism.

[0113] When the first drive mechanism is in the initial state, the lifting member 34 of the first drive mechanism is in contact with the first elastic member 201, and the lifting member 34 of the first drive mechanism does not squeeze the first elastic member 201, that is, the first elastic member 201 is not deformed.

[0114] When the second drive mechanism is in the initial state, the lifting member 34 of the second drive mechanism is in contact with the second elastic member 202, and the lifting member 34 of the second drive mechanism does not squeeze the second elastic member 202, that is, the second elastic member 202 is not deformed.

[0115] When the drive motor 32 of the first drive mechanism rotates forward, it drives the lifting member 34 to move towards the interior of the volute body 10 in the thickness direction of the centrifugal fan via the lead screw 33. That is, the lifting member 34 moves in the -Z direction, causing it to press against the first elastic member 201. The first elastic member 201 deforms towards the interior of the volute body 10, forming an annular protrusion. When the drive motor 32 of the second drive mechanism rotates in reverse, it drives the lifting member 34 to move away from the interior of the volute body 10 in the thickness direction of the centrifugal fan via the lead screw 33. That is, the lifting member 34 moves in the +Z direction.

[0116] When the drive motor 32 of the second drive mechanism rotates forward, it drives the lifting member 34 to move towards the interior of the volute body 10 in the thickness direction of the centrifugal fan via the lead screw 33. That is, the lifting member 34 moves in the +Z direction, causing it to press against the second elastic member 202, forming an annular protrusion inward towards the volute body 10. When the drive motor 32 of the second drive mechanism rotates in reverse, it drives the lifting member 34 to move away from the interior of the volute body 10 in the thickness direction of the centrifugal fan via the lead screw 33. That is, the lifting member 34 moves in the -Z direction.

[0117] exist Figures 9 to 11 In the process, when both the first and second drive mechanisms of the centrifugal fan are in their initial states, the airflow direction is as shown by the arrow. At this time, the centrifugal fan is in its first state. When the ambient wind resistance is equal to the initial wind resistance, the center of the impeller 40 is under negative pressure. A portion of the airflow will flow back from the gap between the volute body 10 and the impeller 40 in the thickness direction of the centrifugal fan to the negative pressure area, reducing the airflow at the volute outlet 102 of the centrifugal fan. Figures 9 to 11 In the middle, the elastic structure 20 did not deform.

[0118] In the thickness direction of the centrifugal fan, the dimensions corresponding to the two gaps between the volute body 10 and the impeller 40 are both H. The unit of H is cm.

[0119] When the ambient wind resistance is the initial wind resistance, when the drive motors 32 of the first drive mechanism and the second drive mechanism are both rotating in the forward direction, the first elastic element 201 deforms in the direction of the inside of the volute body 10 and forms an annular protrusion, and the second elastic element 202 deforms in the direction of the inside of the volute body 10 and forms an annular protrusion. This can fill the gap between the impeller 40 and the volute body 10 and reduce the airflow backflow loss caused by the negative pressure in the center of the impeller 40.

[0120] exist Figures 12 to 14In the first drive mechanism, when both the drive motors 32 of the first drive mechanism and the second drive mechanism rotate forward, and the lifting member 34 of the first drive mechanism moves by a dimension H in the -Z direction and the lifting member 34 of the second drive mechanism moves by a dimension H in the +Z direction, the first elastic member 201 deforms inward toward the volute body 10 and forms an annular protrusion, and the second elastic member 202 deforms inward toward the volute body 10 and forms an annular protrusion. At this time, the centrifugal fan is in the second state. With the centrifugal fan in its fixed position and the ambient wind resistance at the initial wind resistance, the two protrusions prevent airflow from flowing back into the negative pressure zone from the gap between the volute body 10 and the impeller 40 in the thickness direction of the centrifugal fan, and the airflow at the volute outlet 102 of the centrifugal fan reaches its maximum.

[0121] exist Figures 15 to 17 In the first drive mechanism, when both the drive motors 32 of the first and second drive mechanisms rotate forward, and the lifting member 34 of the first drive mechanism moves a dimension greater than H in the -Z direction, and the lifting member 34 of the second drive mechanism moves a dimension greater than H in the +Z direction, the first elastic member 201 forms an annular protrusion towards the interior of the volute body 10, and the second elastic member 202 forms an annular protrusion towards the interior of the volute body 10. At this time, the centrifugal fan is in the third state. In the fixed position of the centrifugal fan, when the ambient wind resistance is equal to the initial wind resistance, the two protrusions can restrict the airflow, reducing the airflow at the volute outlet 102 of the centrifugal fan. In the fixed position of the centrifugal fan, when the ambient wind resistance increases relative to the initial wind resistance, the two protrusions can block the airflow backflow, reducing the airflow at the volute outlet 102 of the centrifugal fan.

[0122] In one possible implementation, an airflow sensor 50 is provided at the volute outlet 102 (see [link]). Figure 1 The airflow sensor 50 is used to collect the airflow at the volute outlet 102 of the volute body 10. This configuration allows for real-time collection of airflow data at the volute outlet 102 and feedback to the control system. The control system dynamically adjusts the drive parameters of the drive mechanism 30 based on the airflow data, ensuring that the deformation state of the elastic structure 20 matches the current operating conditions.

[0123] Among them, the air volume sensor 50 is a sensor used to detect the air volume at the volute outlet 102.

[0124] The control system can be the control system of a centrifugal fan or the control system of an integrated stove.

[0125] Secondly, embodiments of this application provide an oil fume treatment device, including the centrifugal fan of the first aspect.

[0126] The centrifugal fan in this embodiment has the same structure as the centrifugal fan provided in any of the above embodiments and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0127] Thirdly, embodiments of this application provide an integrated stove, including the oil fume treatment device of the second aspect.

[0128] The fume treatment device in this embodiment has the same structure as the fume treatment device provided in any of the above embodiments, and can bring the same or similar technical effects. It will not be described in detail here, but can be referred to the description of the above embodiments.

[0129] Fourthly, embodiments of this application provide a control method for a centrifugal fan, applied to the centrifugal fan of the first aspect.

[0130] See Figure 18 The control methods include:

[0131] S100: In response to the start command, the drive mechanism 30 of the centrifugal fan is controlled to apply external force to the elastic structure 20 of the centrifugal fan to change the deformation state of the elastic structure 20, thereby adjusting the airflow channel of the centrifugal fan. With this configuration, under the fixed speed setting of the centrifugal fan, when the environmental wind resistance or the demand for exhaust air volume changes, the airflow at the volute outlet 102 of the centrifugal fan can be adjusted by changing the airflow channel, thereby improving the overall adaptability of the unit and enabling the integrated stove to accommodate various usage conditions.

[0132] In one possible implementation, the drive mechanism 30 includes a drive assembly and a lifting member 34. The drive assembly includes a base 31, a drive motor 32, and a lead screw 33.

[0133] The centrifugal fan includes two drive mechanisms 30, which are a first drive mechanism and a second drive mechanism, respectively. The elastic structure 20 includes two elastic elements, which are a first elastic element 201 and a second elastic element 202, respectively.

[0134] Each of the two elastic elements corresponds to one elastic element, that is, the first elastic element 201 corresponds to the first driving mechanism, and the second elastic element 202 corresponds to the second driving mechanism.

[0135] The drive motors 32 of the two drive mechanisms 30 have the same speed. The speed of the drive motor 32 is V. The unit of V is cm / s.

[0136] In the thickness direction of the centrifugal fan, the dimensions corresponding to the two gaps between the volute body 10 and the impeller 40 are both H. The unit of H is cm.

[0137] In the thickness direction of the centrifugal fan, the impeller dimension 40 is A. The unit of A is cm.

[0138] A, H, and V satisfy: The unit of M is s, which stands for second.

[0139] See Figure 19 In step S100, the following is included:

[0140] S111: Respond to the start command and obtain the initial air volume.

[0141] Upon receiving the start command, the centrifugal fan is activated, and the impeller 40 rotates. The airflow at the volute outlet 102 of the volute body 10 is collected by the airflow sensor 50; this collected airflow is the initial airflow. At this time, the lifting member 34 is in contact with the elastic structure 20, but the lifting member 34 does not compress the elastic structure 20; that is, the elastic structure 20 is not deformed, the lifting member 34 is in its initial position, and the elastic structure 20 is in its initial state.

[0142] S112. Obtain the movement range of the lifting component 34.

[0143] The movement range of the lifting component 34 is the set of positions of the lifting component 34 when the drive motor 32 rotates forward, the drive motor 32 runs for m times 0.1s, and the running time of the drive motor 32 is less than or equal to M. The unit of m is the same as the unit of M.

[0144] For example, when M is 5.1s, m can take the value of 10, 20, 30, 40, or 50. When the drive motor 32 rotates forward, the position of the lifting member 34 is the first position when the drive motor 32 runs for 1 second, the position of the lifting member 34 is the second position when the drive motor 32 runs for 2 seconds, the position of the lifting member 34 is the third position when the drive motor 32 runs for 3 seconds, the position of the lifting member 34 is the fourth position when the drive motor 32 runs for 4 seconds, and the position of the lifting member 34 is the fifth position when the drive motor 32 runs for 5 seconds. The set of these five preset positions is the movement range of the lifting member 34.

[0145] S113. Control the lifting component 34 to move to each preset position within the moving range to apply external force to the elastic structure 20, so as to change the deformation state of the elastic structure 20 to each deformation state, and obtain the air volume of each first deformation state corresponding to each deformation state.

[0146] For example, the movement range of the lifting member 34 includes five preset positions, namely the first position, the second position, the third position, the fourth position and the fifth position.

[0147] By controlling the lifting component 34 to move to five preset positions, the deformation state of the elastic structure 20 can include five deformation states. That is to say, the five preset positions correspond to five deformation states. By collecting the air volume in the five deformation states through the air volume sensor 50, the air volume of the five first deformation states corresponding to the five deformation states can be obtained. It can also be understood that the five preset positions correspond to the air volume of the five first deformation states.

[0148] S114. Determine the maximum air volume from the initial air volume and the air volume of each first deformation state, and determine the state of the elastic structure 20 corresponding to the maximum air volume as the first target state.

[0149] For example, the air volume of five first deformation states can be collected.

[0150] If the initial air volume is the maximum air volume among the initial air volume and the air volume of the five first deformation states, the state of the elastic structure 20 under the initial air volume is determined as the first target state, that is, the initial state of the elastic structure 20 is determined as the first target state.

[0151] If the first deformation state airflow corresponding to the second position is the maximum airflow among the initial airflow and the airflow of the five first deformation states, the deformation state of the elastic structure 20 corresponding to the second position is determined as the first target state.

[0152] S115. Move the lifting component 34 to the position corresponding to the first target deformation state and determine it as the first target position.

[0153] For example, if the first target state is the state corresponding to the elastic structure 20 under the initial air volume, then the position to which the lifting member 34 moves is the initial position, the first target state corresponds to the initial position, and the initial position is determined as the first target position.

[0154] If the first target state is the deformation state of the elastic structure 20 corresponding to the second position, then the position to which the lifting member 34 moves is the second position. The first target state corresponds to the second position, and the second position is determined as the first target position.

[0155] S116. Control the lifting component 34 to move to the first target position to apply external force to the elastic structure 20 of the centrifugal fan, so as to change the deformation state of the elastic structure 20 and adjust the airflow channel.

[0156] Through steps S111 to S116, under the fixed setting of the centrifugal fan, when the environmental wind resistance changes, the airflow at the volute outlet 102 of the centrifugal fan can be adjusted by adjusting the airflow channel, thereby improving the overall adaptability of the unit and enabling the integrated stove to accommodate various usage conditions. In this embodiment, the environmental wind resistance increases relative to the initial wind resistance, causing the environmental wind resistance to change.

[0157] See Figure 20 In one possible implementation, step S100 includes:

[0158] S121. Respond to the start command and obtain the user-inputted airflow setting value and the initial airflow.

[0159] Before starting the centrifugal fan, the user can input the set air volume value according to the exhaust air volume requirements.

[0160] Upon receiving the start command, the centrifugal fan is activated, the impeller 40 rotates, and the user-inputted airflow setting is acquired. The airflow at the volute outlet 102 of the volute body 10 is collected by the airflow sensor 50; this collected airflow is the initial airflow. At this time, the lifting member 34 is in contact with the elastic structure 20, but the lifting member 34 does not compress the elastic structure 20; that is, the elastic structure 20 is not deformed, the lifting member is in its initial position, and the elastic structure 20 is in its initial state.

[0161] S122. Determine whether the set air volume is equal to the initial air volume.

[0162] S123. If the set air volume is equal to the initial air volume, the drive mechanism 30 of the centrifugal fan is controlled to maintain its current position, that is, the drive mechanism 30 of the centrifugal fan is controlled to be in the initial state.

[0163] S124. If the air volume setting value is not equal to the initial air volume, then obtain the movement range of the lifting component 34.

[0164] The implementation method of step S124 is as follows: Figure 19 The implementation of step S112 in the illustrated embodiment is the same, and will not be described in detail here.

[0165] S125. Control the lifting component 34 to move to each preset position within the moving range to apply external force to the elastic structure 20, so as to change the deformation state of the elastic structure 20 to each deformation state, and obtain the air volume of each second deformation state corresponding to each deformation state.

[0166] For example, the movement range of the lifting member 34 includes five preset positions, namely the first position, the second position, the third position, the fourth position and the fifth position.

[0167] By controlling the lifting component 34 to move to five preset positions, the deformation state of the elastic structure 20 can include five deformation states. That is to say, the five preset positions correspond to five deformation states. By collecting the air volume in the five deformation states through the air volume sensor 50, the air volume of the five second deformation states corresponding to the five deformation states can be obtained. It can also be understood that the five preset positions correspond to the air volume of the five second deformation states.

[0168] S126. From the initial air volume and the air volume of each second deformation state, determine the air volume with the smallest absolute value of the difference from the air volume set value.

[0169] S127. The air volume with the smallest absolute value of the difference from the set air volume value is determined as the third air volume, and the state of the elastic structure 20 under the third air volume is determined as the second target state.

[0170] For example, the air volume of five second deformation states can be collected.

[0171] If the absolute value of the difference between the initial air volume and the air volume set value is the smallest among the initial air volume and the five second deformation state air volumes, the initial air volume is determined as the third air volume, and the state of the elastic structure 20 under the initial air volume is determined as the second target state, that is, the initial state of the elastic structure 20 is determined as the second target state.

[0172] If the absolute value of the difference between the initial air volume and the air volume of the five second deformation states corresponding to the second position and the air volume setting value is the smallest, the air volume of the second deformation state corresponding to the second position is determined as the third air volume, and the deformation state of the elastic structure 20 corresponding to the second position is determined as the second target state.

[0173] S128. Move the lifting component 34 to the position corresponding to the second target state and determine it as the second target position.

[0174] For example, if the second target state is the state corresponding to the elastic structure 20 under the initial air volume, then the position to which the lifting member 34 moves is the initial position, the second target state corresponds to the initial position, and the initial position is determined as the second target position.

[0175] If the second target state is the deformation state of the elastic structure 20 corresponding to the second position, then the position to which the lifting member 34 moves is the second position. The second target state corresponds to the second position, and the second position is determined as the second target position.

[0176] S129. Control the lifting component 34 to move to the second target position to apply external force to the elastic structure 20 of the centrifugal fan, so as to change the deformation state of the elastic structure 20 and adjust the airflow channel.

[0177] Through steps S121 to S129, under the fixed setting of the centrifugal fan, when the exhaust air volume demand changes, the air volume at the centrifugal fan's volute outlet 102 can be adjusted by adjusting the airflow channel, thereby improving the overall adaptability of the unit and enabling the integrated stove to accommodate various usage conditions. In this embodiment, the input air volume setting value is different in different cooking scenarios, and the exhaust air volume demand changes due to the different input air volume setting values.

[0178] 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.

Claims

1. A centrifugal fan, characterized in that, include: The volute body (10) is provided with a volute inlet (101) and a volute outlet (102), and an airflow channel is formed between the volute inlet (101) and the volute outlet (102); An elastic structure (20) is connected to the volute body (10); A drive mechanism (30) is connected to the elastic structure (20) and is configured to apply an external force to the elastic structure (20) to change the deformation state of the elastic structure (20) in order to adjust the airflow channel.

2. The centrifugal fan according to claim 1, characterized in that, It also includes an impeller (40) disposed inside the volute body (10), and the elastic structure (20) disposed on at least one side of the surface of the volute body (10) in the thickness direction of the centrifugal fan, in the radial direction of the impeller (40), and the elastic structure (20) disposed on the outside of the impeller (40).

3. The centrifugal fan according to claim 2, characterized in that, The elastic structure (20) is arranged around the circumference of the impeller (40).

4. The centrifugal fan according to claim 1, characterized in that, The elastic structure (20) includes a first elastic element (201), the volute body (10) has a first surface (103) in the thickness direction of the centrifugal fan, the first surface (103) is provided with a first mounting opening (1031), the first elastic element (201) is bonded to the first surface (103), and the first elastic element (201) covers the first mounting opening (1031); and / or, The elastic structure (20) includes a second elastic element (202). The volute body (10) has a second surface (104) in the thickness direction of the centrifugal fan that is opposite to the first surface (103). The second surface (104) is provided with a second mounting port (1041). The second elastic element (202) is bonded to the second surface (104) and covers the second mounting port (1041).

5. The centrifugal fan according to any one of claims 1-4, characterized in that, The drive mechanism (30) includes a drive assembly and a lifting member (34). The drive assembly is mounted on the volute body (10) and connected to the lifting member (34). The lifting member (34) is disposed on the side of the elastic structure (20) away from the interior of the volute body (10) in the thickness direction of the centrifugal fan.

6. The centrifugal fan according to claim 5, characterized in that, The drive assembly includes a base (31), a drive motor (32), and a lead screw (33). The base (31) is mounted on the volute body (10), the drive motor (32) is mounted on the base (31), and the lead screw (33) connects the drive motor (32) and the lifting component (34).

7. The centrifugal fan according to any one of claims 1-4, characterized in that, An air volume sensor (50) is provided at the volute outlet (102) of the volute body (10), and the air volume sensor (50) is used to collect the air volume at the volute outlet (102) of the volute body (10).

8. An oil fume treatment device, characterized in that, Including the centrifugal fan as described in any one of claims 1-7.

9. An integrated stove, characterized in that, Includes the fume treatment device as described in claim 8.

10. A control method for a centrifugal fan, characterized in that, include: In response to the start command, the drive mechanism (30) of the centrifugal fan is controlled to apply an external force to the elastic structure (20) of the centrifugal fan to change the deformation state of the elastic structure (20) and adjust the airflow channel of the centrifugal fan.

11. The control method for a centrifugal fan according to claim 10, characterized in that, The drive mechanism (30) includes a drive assembly and a lifting component (34); The response to the start command controls the drive mechanism (30) of the centrifugal fan to apply an external force to the elastic structure (20) of the centrifugal fan to change the deformation state of the elastic structure (20) and adjust the airflow channel, including: Respond to the start command and obtain the initial air volume; Obtain the movement range of the lifting component (34); Control the lifting component (34) to move to each preset position within the moving range to apply external force to the elastic structure (20) to change the deformation state of the elastic structure (20) to each deformation state, and obtain the air volume of each first deformation state corresponding to each deformation state. The maximum air volume is determined from the initial air volume and the air volume of each first deformation state, and the state of the elastic structure (20) under the maximum air volume is determined as the first target state. The position to which the lifting member (34) corresponding to the first target deformation state is moved is determined as the first target position; The lifting component (34) is controlled to move to the first target position to apply an external force to the elastic structure (20) of the centrifugal fan to change the deformation state of the elastic structure (20) and adjust the airflow channel.

12. The control method for a centrifugal fan according to claim 10, characterized in that, The drive mechanism (30) includes a drive assembly and a lifting component (34); The response to the start command controls the drive mechanism (30) of the centrifugal fan to apply an external force to the elastic structure (20) of the centrifugal fan to change the deformation state of the elastic structure (20) and adjust the airflow channel, including: Respond to the start command, obtain the user-inputted airflow setting value, and the initial airflow; Determine whether the set airflow value is equal to the initial airflow; If the air volume setting value is not equal to the initial air volume, then the movement range of the lifting component (34) is obtained; Control the lifting component (34) to move to each preset position within the moving range to apply external force to the elastic structure (20) to change the deformation state of the elastic structure (20) to each deformation state, and obtain the air volume of each second deformation state corresponding to each deformation state. From the initial air volume and the air volume of each of the second deformation states, determine the air volume with the smallest absolute value of the difference from the air volume set value; The airflow with the smallest absolute value of the difference from the airflow set value is determined as the third airflow, and the state of the elastic structure (20) under the third airflow is determined as the second target state. The position to which the lifting component (34) corresponding to the second target state is moved is determined as the second target position; The lifting component (34) is controlled to move to the second target position to apply an external force to the elastic structure (20) of the centrifugal fan to change the deformation state of the elastic structure (20) and adjust the airflow channel.

13. The control method for a centrifugal fan according to claim 12, characterized in that, The step of determining whether the set air volume value is equal to the initial air volume further includes: If the air volume setting value is equal to the initial air volume, the drive mechanism (30) of the centrifugal fan is controlled to maintain the current position.

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