WO2024055614A1

WO2024055614A1 - Range hood assembly and integrated cooker

Info

Publication number: WO2024055614A1
Application number: PCT/CN2023/093786
Authority: WO
Inventors: 雷国茂; 吴慧民; 单树军; 王凯; 刘小凯; 郑量
Original assignee: 佛山市顺德区美的电热电器制造有限公司
Priority date: 2022-09-15
Filing date: 2023-05-12
Publication date: 2024-03-21
Also published as: CN218001610U

Abstract

The present application provides a range hood assembly and an integrated cooker. The range hood assembly comprises: a volute comprising an air inlet and an air outlet; and a flow collecting part arranged on the volute and comprising an air duct, an outlet of the air duct being communicated with the air inlet, wherein the inner surface of the air duct is a curved surface; and the flow area of the air duct is gradually reduced in the flow direction of the air duct. By defining the described features, a tapered air duct of which the inner surface is a smooth curved surface is formed in the flow collecting part. By providing the smooth curved surface, the impact of airflow on the inner wall of the air duct can be reduced, and the possibility that the airflow flows back or generates vortexes due to impact can be reduced in the airflow collecting process, thereby overcoming the technical defects in the prior art of backflow and vortexes being prone to occurring, the airflow being prone to leakage, and aerodynamic noise being large. On this basis, by providing an air duct in which the flow area is gradually reduced in the airflow direction, oil fumes can be compressed and accelerated by means of the air duct, so that range hood flow volume is increased, thereby solving the technical problem of being unable to meet fume exhaust requirements due to small range hood flow volume.

Description

Hood components and integrated stove

This application claims priority to the Chinese patent application filed with the China Patent Office on September 15, 2022, with application number 202222438708.8 and the application name "Cigarette Machine Assembly and Integrated Stove", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the technical field of kitchen appliances, specifically, to a hood assembly and an integrated stove.

Background technique

In the related art, the air inlet of the volute of the hood assembly usually uses a straight tube structure to guide the air flow. However, the straight tube structure is prone to backflow and vortex, leading to air flow leakage. Leakage will cause the flow rate of the hood to decrease, affecting the smoke extraction effect of the hood. Backflow and vortex will cause obvious aerodynamic noise, resulting in an increase in the working noise of the fan.

Therefore, how to design a hood assembly and integrated stove that can effectively solve the above technical defects has become an urgent technical problem to be solved.

Application content

This application aims to solve at least one of the technical problems existing in the prior art.

To this end, a first aspect of the present application proposes a hood assembly.

A second aspect of the application proposes an integrated stove.

In view of this, according to the first aspect of the present application, a hood assembly is proposed. The hood assembly includes: a volute, including an air inlet and an air outlet; a collecting part, located on the volute, including an air duct, and the air duct The outlet is connected with the air inlet; the inner surface of the air duct is a curved surface; in the flow direction of the air duct, the circulation area of the air duct gradually decreases.

This application proposes a hood assembly. The hood assembly is a power structure on a smoke exhaust stove. The specific hood assembly can suck oil fumes and discharge the sucked oil fumes to a designated area through the flue.

The hood assembly includes a volute and a collecting part. The volute is the main structure of the hood assembly. On the one hand, it is used for defining and supports other structures on the hood assembly. On the other hand, the volute encloses a flow channel for the flow of oil smoke. An air inlet and an air outlet are formed on the volute. The air inlet is arranged on the end face of the volute and is coaxial with the volute. The air outlet is arranged on the side of the volute. The collecting part is arranged at the air inlet of the volute, and the outlet of the collecting part is connected with the air inlet. During the working process, the oil fume flows into the air inlet under the collection effect of the collecting part. The oil fume is pressurized and expanded through the volute in the flow channel and then discharged from the volute through the air outlet, thereby achieving the extraction of oil fume and the directional emission of oil fume.

In the related art, the current collector at the air inlet of the hood has a cylindrical structure. The cylindrical current collector is prone to backflow and vortex, resulting in air flow leakage. Leakage will cause the flow rate of the hood to decrease, affecting the smoke extraction effect of the hood. Backflow and vortex will cause obvious aerodynamic noise, resulting in an increase in the working noise of the fan.

In this regard, in the hood assembly defined in this application, the inner surface of the collecting part enclosing the air outlet duct is a curved surface, and in the flow direction of the air duct, the flow area of the air duct gradually decreases. The flow direction is the direction in which the air flows from the inlet to the outlet. The air duct is cut through a surface perpendicular to the flow direction. The area of the air duct on the cross section is the flow area.

By defining the above characteristics, an air duct with a smooth curved inner surface and a tapered inner surface is formed in the collecting part. Setting up a smooth curved surface can reduce the impact of airflow on the inner wall of the air duct, and can reduce the possibility of airflow backflow or vortex due to impact during the process of gathering airflow, thereby overcoming the problems in related technologies that are prone to backflow and vortex, and airflow is prone to leakage. , technical defects of large aerodynamic noise. On this basis, by setting up an air duct with a circulation area that gradually shrinks in the upward direction of the air flow, the oil fume can be accelerated through air duct compression, thereby increasing the flow rate of the hood and solving the technical problem of the hood having a small flow rate and being unable to meet the smoke exhaust demand. For example, by defining the above-mentioned collecting part, the flow rate of the hood assembly can be increased by more than 10%, and the single-point boost level of the fan outlet can be reduced by more than 2 dB. This further achieves the technical effects of optimizing the fan structure, improving the fan's oil fume extraction performance, reducing the fan's aerodynamic noise, and improving the user experience.

In addition, the above-mentioned hood assembly provided by this application can also have the following additional technical features:

In the above technical solution, the hood assembly further includes: an impeller located in the volute, the air outlet is located on the peripheral side of the impeller, the air inlet is located on the end side of the impeller, and the diameter of the impeller is the first diameter D1.

In this technical solution, the hood assembly also includes an impeller. The impeller is installed in the volute, the air inlet is opposite to the end face of the impeller, and the air outlet is located on the peripheral side of the impeller. The cigarette machine assembly also includes a motor. The motor is installed on the volute, and the power output end of the motor is connected to the impeller. After power is supplied, the motor drives the impeller to rotate. The rotating impeller draws the oil fume into the interior of the impeller from the air inlet on the end side, and is then driven by The peripheral side of the impeller is discharged into the volute, and the final Finally, it is discharged from the air outlet under the pressurization and expansion effects of the volute. Wherein, the outer diameter of the impeller is the first diameter.

In any of the above technical solutions, the inner surface of the air duct is a conical surface.

In this technical solution, the inner surface of the air duct is a conical surface, the expanded mouth of the conical surface is the inlet, and the narrow mouth is the outlet. By structuring the inner surface of the air duct into a conical surface, the air path profile inside the air duct can be optimized, reducing the impact of oil smoke on the inner surface of the air duct, thereby reducing aerodynamic noise. At the same time, setting the inner surface of the air duct to a conical surface can further improve the compression and acceleration effect of the air duct on the oil smoke, thereby increasing the flow rate of the hood assembly by accelerating the oil smoke, so that the flow rate of the hood assembly can match the demand for oil smoke extraction. In order to achieve the technical effect of optimizing the shape of the air duct, improving the performance of the hood components for extracting oil smoke, and reducing the working noise of the hood components.

In any of the above technical solutions, the generating line of the conical surface is an arc segment.

In this technical solution, following the previous technical solution, the generatrix of the inner surface of the air duct is an arc segment. Constructing the generatrix of the aforementioned conical surface into an arc segment can further optimize the smoothness characteristics in the air duct, specifically by further reducing the distance between the air flow and the inner surface of the air duct. The impact and friction of the hood assembly are used to further reduce the aerodynamic noise of the hood assembly. At the same time, the bus bar is constructed as an arc coil to enhance the compression and acceleration effect of the collector on the oil fume to further increase the flow rate of the hood assembly. In order to achieve the technical effect of optimizing the shape of the air duct, improving the performance of the hood components for extracting oil smoke, and reducing the working noise of the hood components.

In any of the above technical solutions, the diameter of the inlet of the air duct is the second diameter D2, and the ratio of the second diameter to the first diameter ranges from greater than or equal to 0.71 to less than or equal to 0.97.

In this technical solution, the size of the air duct inlet is limited. For example, the diameter of the air duct inlet is the second diameter, and the ratio of the second diameter to the first diameter needs to be greater than or equal to 0.71. By limiting the ratio of the second diameter to the first diameter to be greater than or equal to 0.71, an undersized inlet can be avoided. Affects the flow rate of hood components to ensure that the flow rate of hood components meets the demand for range smoke extraction. On this basis, the ratio of the second diameter to the first diameter also needs to be less than or equal to 0.97. By limiting the ratio of the second diameter to the first diameter to less than or equal to 0.97, the air duct inlet size can be reduced on the basis of ensuring that it can match the impeller performance. The size of the inlet thus provides convenience for the miniaturization design of the hood components. At the same time, limiting the size of the air duct inlet to the above range is helpful to further reduce the aerodynamic noise of the hood assembly.

In any of the above technical solutions, the diameter of the outlet of the air duct is the third diameter D3, and the ratio of the third diameter to the first diameter ranges from greater than or equal to 0.64 to less than or equal to 0.88.

In this technical solution, the size of the air duct outlet is limited. For example, the diameter of the air duct outlet is the third diameter, and the ratio of the third diameter to the first diameter needs to be greater than or equal to 0.64. By defining the third diameter The ratio of the diameter to the first diameter is greater than or equal to 0.64, which can prevent an outlet that is too small from affecting the flow rate of the hood assembly, thus ensuring that the flow rate of the hood assembly meets the demand for range smoke extraction. On this basis, the ratio of the third diameter to the first diameter also needs to be less than or equal to 0.88. By limiting the ratio of the third diameter to the first diameter to less than or equal to 0.88, the size of the air duct outlet can be reduced while ensuring that it can match the impeller performance. The size of the outlet thus provides convenience for the miniaturization design of the hood components. At the same time, limiting the size of the air duct outlet to the above range is helpful to further reduce the aerodynamic noise of the hood assembly.

In any of the above technical solutions, the volute further includes a volute tongue, the end surface of the volute tongue is an arc surface; the ratio of the radius R1 of the end surface of the volute tongue to the first diameter ranges from greater than or equal to 0.04 to less than or equal to 0.07.

In this technical solution, a volute tongue is formed on the volute, and the volute tongue is recessed toward the intersection area of the pressurizing section and the expansion section inside the volute, and the end surface of the volute tongue is located inside the volute. Among them, the end surface of the volute tongue is an arc surface, and the ratio of the radius of the end surface to the first diameter needs to be greater than or equal to 0.04 and less than or equal to 0.07. Limiting the size of the volute tongue by the above ratio range can increase the matching degree between the volute tongue and the impeller, which is beneficial to increasing the flow rate of the hood assembly and reducing the aerodynamic noise of the hood assembly. Moreover, by limiting the size of the volute tongue through the above ratio interval, the whistling sound and buzzing sound of oil smoke can also be eliminated. This will achieve the technical effect of optimizing the size of the volute tongue, improving the fume extraction performance of the hood components, and reducing the working noise of the hood components.

In any of the above technical solutions, the distance between the volute tongue and the impeller is the first distance L1; the range of the ratio of the first distance to the first diameter is: greater than or equal to 0.03 and less than or equal to 0.07.

In this technical solution, following the aforementioned technical solution, the distance between the volute tongue and the impeller is limited. For example, the minimum distance between the volute tongue and the impeller is the first distance, where the ratio of the first distance to the first diameter needs to be greater than or equal to 0.03 and less than or equal to 0.07. By limiting the distance between the volute tongue and the impeller through the above ratio interval, it is possible to avoid oil smoke from producing obvious turbulent noise between the volute tongue and the impeller while meeting the demand for boosting volume. Moreover, by limiting the above proportional interval, it is also helpful to further increase the flow rate of the hood assembly. At the same time, limiting the size of the volute tongue through the above ratio range can also eliminate the whistling and buzzing sounds of oil smoke. This will achieve the technical effect of optimizing the size of the volute tongue, improving the fume extraction performance of the hood components, and reducing the working noise of the hood components.

In any of the above technical solutions, the volute includes a flow channel, and the flow channel includes a connected supercharging section and a diffusing section; the impeller is located in the supercharging section, the air inlet is connected with the supercharging section, and the air outlet is connected with the diffusing section. .

In this technical solution, a flow channel for oil fume to circulate is enclosed inside the volute, where the flow channel includes a supercharging section and a diffuser section, the impeller is arranged in the supercharging section, and the axis of the impeller coincides with the axis of the volute. impeller rotation After starting, the oil smoke sucked in from the end face of the impeller is thrown into the supercharging section, where it is compressed and boosted. Thereafter, the oil smoke flows from the supercharging section into the expansion section. The oil smoke expands and decelerates in the expansion section, reverses the flow direction in the expansion section, and finally discharges the oil smoke from the air outlet.

In any of the above technical solutions, the hood assembly also includes: cutting the volute through a plane perpendicular to the axis of the volute to obtain a cross section; the volute enclosing the pressurizing section on the section is a spiral, enclosing the expansion section. The volute of the compression section is composed of a first line segment and a second line segment. The first line segment is connected to the inner end of the spiral, and the second line segment is connected to the outer end of the spiral. The second line segment is tangent to the spiral.

In this technical solution, the shape of the volute is limited. Illustratively, the cross section is obtained by cutting the volute through a plane perpendicular to the axis of the volute. The volute enclosing the supercharging section on this section is cut into a spiral. The spiral expands spirally from the inside to the outside, and the inner end of the spiral is connected to the volute tongue. And on this cross-section, the volute enclosing the expansion section is cut into a first line segment and a second line segment, the first line segment is connected to the inner end of the aforementioned spiral, the first line segment constructs the volute tongue, and the third line segment The second line segment is connected to the outer end of the spiral.

On this basis, the second line segment is tangent to the end of the spiral in the cross section. By setting the second line segment tangent to the spiral, on the one hand, the impact and friction of the oil smoke on the inner wall of the expansion section can be reduced, and on the other hand, the impact and friction of the oil smoke on the inner wall of the expansion section can be reduced. Weaken the vortices in the diffuser section, thereby reducing the energy loss of oil smoke when flowing through the diffuser section. This will achieve the technical effects of optimizing the shape of the volute, increasing the flow rate of the hood components, and reducing the aerodynamic noise of the hood components.

In any of the above technical solutions, the hood assembly also includes: a first blocking rib, located at the air outlet; a second blocking rib, located at the expansion section, connected to the first blocking rib; in cross section, the first blocking rib Connect the end of the first line segment, and the second retaining rib connects the intersection area of the first line segment and the spiral.

In this technical solution, the hood assembly further includes a first retaining rib and a second retaining rib. For example, the first blocking rib is provided at the air outlet, and the first blocking rib can block part of the air outlet. The second blocking rib is provided inside the expansion section, and the second blocking rib is connected to the first blocking rib. On the aforementioned cross-section, the first end of the first retaining rib is connected to the end of the first line segment, the second end of the first retaining rib is connected to the first end of the second retaining rib, and the second end of the second retaining rib is connected to The intersection area of the first line segment and the spiral line, that is, the volute tongue connection, thereby dividing a part of the expansion section.

By arranging the first and second blocking ribs, the deflection angle of the oil smoke in the expansion section can be reduced, thereby weakening the vortex in the expansion section, thereby reducing the energy loss of the oil smoke in the process of flowing through the expansion section. This can achieve the technical effects of optimizing the shape of the volute, increasing the flow rate of the hood components, and reducing the aerodynamic noise of the hood components. For example, by combining the first and second blocking ribs with the tangential design solution in the foregoing technical solution, the effect of eliminating the vortex inside the expansion section can be achieved, thereby eliminating the impact of the vortex on the flow rate, and eliminating the effects of the vortex on the flow rate. aerodynamic noise.

In any of the above technical solutions, the range of the expansion angle of the expansion section is: greater than or equal to 5° and less than or equal to 12°.

In this technical solution, the expansion angle of the expansion section is limited, and the expansion angle is the angle between the straight segment at the end of the first line segment and the second line segment. For example, the expansion angle of the expansion section needs to be greater than or equal to 5° and less than or equal to 12°. By limiting the expansion angle within the above range, it is possible to avoid the formation of vortices inside the expansion section on the basis of ensuring that the expansion section has a good expansion effect for oil smoke. This eliminates the impact of vortices on flow and eliminates aerodynamic noise caused by vortices.

For example, the expansion angle may be 8°.

In any of the above technical solutions, according to the second aspect of the present application, an integrated stove is proposed. The integrated stove includes: a heating component for supporting and heating the container, including a flue; as in any of the above technical solutions Hood assembly, the air inlet is connected with the flue, and is used to extract oil smoke through the flue.

In this technical solution, an integrated stove equipped with the hood assembly in any of the above technical solutions is proposed. Therefore, the integrated stove has the advantages of the hood assembly in any of the above technical solutions. The technical effects that can be achieved by the hood components in any of the above technical solutions can be achieved. To avoid repetition, they will not be repeated here.

On this basis, the integrated stove is an internal circulation integrated stove. This integrated stove can centrally extract the oil fumes generated by cooking into the interior of the integrated stove, complete grease filtration and odor filtration inside the integrated stove, and then discharge it back to the user's location. In the indoor environment, in order to achieve internal circulation of oil fume, there is no need to set up a complex external exhaust structure.

Integrated stoves include heating components. The heating component is the main structure of the integrated stove and is used to position and support other structures on the integrated stove. The top of the heating component can provide a cooking operation surface for the user, and a container for holding ingredients is placed above the heating component to support and heat the container through the heating component. Thus, finished food that meets the user's needs can be cooked on the heating component.

A flue is formed inside the heating component. The first end of the flue is connected to the space above the heating component. During the process of cooking food, oil fumes are concentrated above the heating component. The flue allows the fumes above the heating component to flow into the integrated stove. . The shell is connected to the heating component, and the second end of the flue is connected to the air inlet on the shell. The fan is installed in the cavity, and the fan can extract the oil fume above the heating component through the cavity and the flue. For example, after the fan is turned on, the fan draws the gas in the flue into the fan through the cavity to form a negative pressure environment in the flue area. Under the action of this negative pressure environment, the oil fume above the heating component is pressed into inside the flue, To complete the suction of oil fume and prevent the oil fume from spreading to the indoor environment.

In any of the above technical solutions, the integrated stove also includes: a filter component, which is located in the flue and used to filter oil smoke.

In this technical solution, the integrated stove is also provided with a filter component, and the filter component is arranged in the flue. During the working process, the oil fume flowing into the flue first flows into the filter component, which separates the grease in the oil fume from the air to prevent the grease from continuing to flow into the hood along with the air. By providing this filter component, the grease in the oil fume can be prevented from adhering to the internal working structure of the integrated stove, thereby preventing the grease from blocking the flue and the filter on the one hand, and preventing the grease being drawn into the fan from damaging the fan on the other hand. On the other hand, it eliminates the need to frequently clean the grease inside the integrated stove. This solves the technical problem of the fan being easily damaged by oil dirt and inhaling oil dirt increasing the burden of cleaning the interior of the integrated stove.

In any of the above technical solutions, the integrated stove also includes: a pipeline component connected to the air outlet.

In this technical solution, the integrated stove also includes a pipeline component. The pipeline assembly includes a pipe joint and at least one smoke exhaust pipe. When there are multiple smoke exhaust pipes, the plurality of smoke exhaust pipes are connected in series, the first end of the pipe joint is connected to the air outlet on the shell, and the second end of the pipe joint is connected to the mouth of the smoke exhaust pipe. By setting up pipeline components, the oil fumes that have been separated from grease and odor filtered can be discharged to designated areas through the pipeline components. Specifically, longitudinally extending pipeline components can be provided so that the filtered air can be discharged close to the ground to reduce the possibility of the exhaust gas disturbing users. This further improves the practicality and reliability of the integrated stove and optimizes the user experience.

Additional aspects and advantages of the invention will be apparent from the description which follows, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 shows one of the structural schematic diagrams of a hood assembly according to an embodiment of the present application;

Figure 2 shows an exploded view of a hood assembly according to one embodiment of the present application;

Figure 3 shows one of the structural schematic diagrams of an impeller according to an embodiment of the present application;

Figure 4 shows the second structural schematic diagram of an impeller according to an embodiment of the present application;

Figure 5 shows the second structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 6 shows a cross-sectional view of the hood assembly shown in Figure 5 in the A-A direction;

Figure 7 shows a schematic structural diagram of a hood assembly in the related art;

Figure 8 is a schematic diagram of the air flow of the hood assembly in the related art shown in Figure 7;

Figure 9 shows the third structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 10 is a schematic diagram of the air flow of the hood assembly in the embodiment shown in Figure 9;

Figure 11 shows the fourth structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 12 is a schematic diagram of the air flow of the hood assembly in the embodiment shown in Figure 11;

Figure 13 shows the fifth structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 14 shows a cross-sectional view of the hood assembly shown in Figure 13 in the B-B direction;

Figure 15 shows the sixth structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 16 is a schematic diagram of the air flow of the hood assembly in the embodiment shown in Figure 15;

Figure 17 shows the seventh structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 18 is a schematic diagram of the air flow of the hood assembly in the embodiment shown in Figure 17;

Figure 19 shows the eighth structural schematic diagram of the hood assembly according to an embodiment of the present application;

Figure 20 is a schematic diagram of the air flow of the hood assembly in the embodiment shown in Figure 19;

Figure 21 shows a schematic structural diagram of an integrated stove according to an embodiment of the present application.

Among them, the corresponding relationship between the reference signs and component names in Figures 1 to 21 is:

100 cigarette machine components, 110 volute, 112 air inlet, 114 air outlet, 116 volute tongue, 118 booster section, 1182 spiral, 119 diffuser section, 1192 first line segment, 1194 second line segment, 120 collector , 122 busbar, 130 impeller, 140 first retaining rib, 142 second retaining rib, 200 integrated stove, 210 heating component, 220 filter component, 230 pipeline component.

Detailed ways

In order to understand the above-mentioned objects, features and advantages of the present application more clearly, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, as long as there is no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Many specific details are set forth in the following description to fully understand the present application. However, the present application can also be implemented in other ways different from those described here. Therefore, the protection scope of the present application is not limited by the specific disclosures below. Limitations of Examples.

The following describes hood components and integrated stoves according to some embodiments of the present application with reference to FIGS. 1 to 21 .

As shown in Figures 1, 2 and 6, one embodiment of the present application proposes a hood assembly 100. The hood assembly 100 includes: a volute 110, including an air inlet 112 and an air outlet 114; a current collector 120 , located on the volute 110, including an air duct, the outlet of the air duct is connected with the air inlet 112; the inner surface of the air duct is a curved surface; in the flow direction of the air duct, the flow area of the air duct gradually decreases.

This application proposes a hood assembly 100. The hood assembly 100 is a power structure on a smoke exhaust stove. Specifically, the hood assembly 100 can suck oil fumes and discharge the sucked oil fumes to a designated area through the flue.

The hood assembly 100 includes a volute 110 and a collecting part 120. The volute 110 is the main structure of the hood assembly 100. On the one hand, it is used to position and support other structures on the hood assembly 100. On the other hand, the volute 110 surrounds Close the flow channel for the flow of oil fume. An air inlet 112 and an air outlet 114 are formed on the volute 110 . The air inlet 112 is arranged on the end surface of the volute 110 and is coaxial with the volute 110 . The air outlet 114 is arranged on the side of the volute 110 . The collecting part 120 is disposed at the air inlet 112 of the volute 110 , and the outlet of the collecting part 120 is connected with the air inlet 112 . During the working process, the oil fume flows into the air inlet 112 under the collection effect of the collecting part 120. The oil fume is pressurized and expanded through the volute 110 in the flow channel and then discharged from the volute 110 through the air outlet 114, thereby realizing the extraction and removal of the oil fume. Directed emissions.

In this regard, in the hood assembly 100 defined in this application, the inner surface of the collecting portion 120 enclosing the air outlet is a curved surface, and in the flow direction of the air duct, the flow area of the air duct gradually decreases. The flow direction is the direction in which the air flows from the inlet to the outlet. The air duct is cut through a surface perpendicular to the flow direction. The area of the air duct on the cross section is the flow area.

By limiting the above characteristics, an air duct with a smooth curved inner surface and a tapered inner surface is formed in the collecting portion 120 . Setting up a smooth curved surface can reduce the impact of airflow on the inner wall of the air duct, and can reduce the possibility of airflow backflow or vortex due to impact during the process of gathering airflow, thereby overcoming the problems in related technologies that are prone to backflow and vortex, and airflow is prone to leakage. , technical defects of large aerodynamic noise. On this basis, by setting up an air duct with a circulation area that gradually shrinks in the upward direction of the air flow, the oil fume can be accelerated through air duct compression, thereby increasing the flow rate of the hood and solving the technical problem of the hood having a small flow rate and being unable to meet the smoke exhaust demand. For example, By limiting the above-mentioned collecting part 120, the flow rate of the hood assembly 100 can be increased by more than 10%, and the single-point boost level of the fan outlet 114 can be reduced by more than 2 dB. This further achieves the technical effects of optimizing the fan structure, improving the fan's oil fume extraction performance, reducing the fan's aerodynamic noise, and improving the user experience.

As shown in Figures 3 and 4, the hood assembly 100 also includes: an impeller 130, which is located in the volute 110. The air outlet 114 is located on the peripheral side of the impeller 130, the air inlet 112 is located on the end side of the impeller 130, and the diameter of the impeller 130 is is the first diameter D1.

In this embodiment, the hood assembly 100 further includes an impeller 130 installed in the volute 110 , the air inlet 112 is opposite to the end surface of the impeller 130 , and the air outlet 114 is located on the peripheral side of the impeller 130 . The hood assembly 100 also includes a motor. The motor is installed on the volute 110, and the power output end of the motor is connected to the impeller 130. After power is supplied, the motor drives the impeller 130 to rotate. The rotating impeller 130 draws the oil smoke into the air inlet 112 on the end side. The inside of the impeller 130 is then discharged into the interior of the volute 110 from the peripheral side of the impeller 130, and is finally discharged from the air outlet 114 under the pressurization and expansion effects of the volute 110. The outer diameter of the impeller 130 is the first diameter.

As shown in Figures 5 and 6, in one embodiment of the present application, the inner surface of the air duct is a conical surface.

In this embodiment, the inner surface of the air duct is a conical surface, the widened mouth of the conical surface is the inlet, and the narrow mouth is the outlet.

Comparing Figures 7, 8, 9 and 10, we can see that by structuring the inner surface of the air duct into a conical surface, the air path profile inside the air duct can be optimized, reducing the impact of oil smoke on the inner surface of the air duct, thereby reducing aerodynamic noise. . At the same time, setting the inner surface of the air duct as a conical surface can further improve the compression and acceleration effect of the air duct on the oil smoke, thereby increasing the flow rate of the hood assembly 100 by accelerating the oil smoke, so that the flow rate of the hood assembly 100 can match the demand for oil smoke extraction. This achieves the technical effects of optimizing the shape of the air duct, improving the fume extraction performance of the hood assembly 100, and reducing the operating noise of the hood assembly 100.

In any of the above embodiments, the generating line 122 of the conical surface is an arc segment.

In this embodiment, following the previous embodiment, the generatrix 122 on the inner surface of the air duct is an arc segment.

Comparing Figures 9, 10, 11 and 12, it can be seen that structuring the busbar 122 of the aforementioned conical surface as an arc segment can further optimize the smoothness characteristics in the air duct, specifically by further reducing the impact and friction between the airflow and the inner surface of the air duct. The aerodynamic noise of the hood assembly 100 is reduced, and at the same time, the bus bar 122 is configured as an arc coil to enhance the compression and acceleration effect of the current collector 120 on the oil smoke, so as to further increase the flow rate of the hood assembly 100 . In order to optimize the shape of the air duct and improve the performance of the range hood assembly 100, The technical effect of reducing the operating noise of the hood assembly 100.

As shown in Figure 6, in any of the above embodiments, the diameter of the inlet of the air duct is the second diameter D2, and the ratio of the second diameter to the first diameter ranges from greater than or equal to 0.71 to less than or equal to 0.97.

In this embodiment, the size of the air duct inlet is limited. For example, the diameter of the air duct inlet is the second diameter, and the ratio of the second diameter to the first diameter needs to be greater than or equal to 0.71. By limiting the ratio of the second diameter to the first diameter to be greater than or equal to 0.71, an undersized inlet can be avoided. The flow rate of the hood assembly 100 is affected, thereby ensuring that the flow rate of the hood assembly 100 meets the demand for smoke extraction. On this basis, the ratio of the second diameter to the first diameter also needs to be less than or equal to 0.97. By limiting the ratio of the second diameter to the first diameter to less than or equal to 0.97, it can be ensured that the air duct inlet size can match the performance of the impeller 130 The size of the inlet is reduced, thus facilitating the miniaturization design of the hood assembly 100. At the same time, limiting the size of the air duct inlet to the above range is beneficial to further reducing the aerodynamic noise of the hood assembly 100.

In any of the above embodiments, the diameter of the outlet of the air duct is the third diameter D3, and the ratio of the third diameter to the first diameter ranges from greater than or equal to 0.64 to less than or equal to 0.88.

In this embodiment, the size of the air duct outlet is limited. For example, the diameter of the air duct outlet is the third diameter, and the ratio of the third diameter to the first diameter needs to be greater than or equal to 0.64. By limiting the ratio of the third diameter to the first diameter to be greater than or equal to 0.64, an outlet that is too small can be avoided. The flow rate of the hood assembly 100 is affected, thereby ensuring that the flow rate of the hood assembly 100 meets the demand for smoke extraction. On this basis, the ratio of the third diameter to the first diameter also needs to be less than or equal to 0.88. By limiting the ratio of the third diameter to the first diameter to less than or equal to 0.88, it can be ensured that the air duct outlet size can match the performance of the impeller 130 The size of the outlet is reduced, thus facilitating the miniaturization design of the hood assembly 100. At the same time, limiting the size of the air duct outlet to the above range is beneficial to further reducing the aerodynamic noise of the hood assembly 100.

As shown in Figures 13 and 14, in one embodiment of the present application, the volute 110 also includes a volute tongue 116, the end surface of the volute tongue 116 is an arc surface; the ratio of the radius R1 of the end surface of the volute tongue 116 to the first diameter The range is: greater than or equal to 0.04, and less than or equal to 0.07.

In this embodiment, a volute tongue 116 is formed on the volute 110 . The volute tongue 116 is recessed toward the intersection area of the pressurizing section 118 and the expansion section 119 inside the volute 110 . The end surface of the volute tongue 116 is located inside the volute 110 . The end surface of the volute tongue 116 is an arc surface, and the ratio of the radius of the end surface to the first diameter needs to be greater than or equal to 0.04 and less than or equal to 0.07. By limiting the size of the volute tongue 116 through the above ratio range, the matching degree between the volute tongue 116 and the impeller 130 can be increased, which is beneficial to increasing the flow rate of the hood assembly 100 and reducing the cost of the hood assembly. 100% aerodynamic noise. Furthermore, by limiting the size of the volute tongue 116 through the above ratio interval, the whistling sound and buzzing sound of oil smoke can also be eliminated. This achieves the technical effects of optimizing the size of the volute tongue 116, improving the range fume extraction performance of the hood assembly 100, and reducing the operating noise of the hood assembly 100.

In any of the above embodiments, the distance between the volute tongue 116 and the impeller 130 is the first distance L1; the ratio of the first distance to the first diameter ranges from greater than or equal to 0.03 to less than or equal to 0.07.

In this embodiment, following the previous embodiment, the distance between the volute tongue 116 and the impeller 130 is limited. For example, the minimum distance between the volute tongue 116 and the impeller 130 is a first distance, where the ratio of the first distance to the first diameter needs to be greater than or equal to 0.03 and less than or equal to 0.07. By limiting the distance between the volute tongue 116 and the impeller 130 by the above ratio interval, it is possible to avoid oil smoke from producing obvious turbulent noise between the volute tongue 116 and the impeller 130 while meeting the demand for supercharging and lifting volume. Moreover, by limiting the above proportional interval, it is also helpful to further increase the flow rate of the hood assembly 100 . At the same time, by limiting the size of the volute tongue 116 through the above ratio interval, the whistling sound and buzzing sound of oil smoke can also be eliminated. This achieves the technical effects of optimizing the size of the volute tongue 116, improving the range fume extraction performance of the hood assembly 100, and reducing the operating noise of the hood assembly 100.

As shown in Figures 13 and 14, in one embodiment of the present application, the volute 110 includes a flow channel, and the flow channel includes a connected supercharging section 118 and a diffuser section 119; the impeller 130 is located in the supercharging section 118. The air outlet 112 is connected to the pressurizing section 118, and the air outlet 114 is connected to the expansion section 119.

In this embodiment, the volute 110 encloses a flow channel for oil fume to circulate. The flow channel includes a supercharging section 118 and a diffuser section 119. The impeller 130 is disposed in the supercharging section 118, and the axis of the impeller 130 is in line with the The axes of the volute 110 coincide. After the impeller 130 rotates, the oil smoke sucked in from the end surface of the impeller 130 is thrown into the supercharging section 118 and is compressed and pressurized in the supercharging section 118 . Thereafter, the oil fume flows from the supercharging section 118 into the diffusion section 119. The oil fume expands and decelerates in the diffusion section 119, reverses the flow direction in the diffusion section 119, and is finally discharged from the air outlet 114.

As shown in Figure 17, in any of the above embodiments, the volute 110 is cut through a plane perpendicular to the axis of the volute 110 to obtain a cross section; the volute 110 enclosing the pressurization section 118 on the cross section is in the shape of a spiral 1182 , the volute 110 enclosing the expansion section 119 is a first line segment 1192 and a second line segment 1194. The first line segment 1192 is connected to the inner end of the spiral 1182, and the second line segment 1194 is connected to the outer end of the spiral 1182. Connected; the second line segment 1194 is tangent to the spiral 1182.

In this embodiment, the shape of the volute 110 is defined.

Comparing Figure 15, Figure 16, Figure 17 and Figure 18, it can be seen that through the plane perpendicular to the axis of the volute 110 Cut the volute 110 to obtain a cross section. The volute 110 enclosing the supercharging section 118 in this section is cut into a spiral 1182. The spiral 1182 spirally expands from the inside to the outside, and the inner end of the spiral 1182 is connected to the volute tongue 116. And on this cross-section, the volute 110 enclosing the expansion section 119 is cut into a first line segment 1192 and a second line segment 1194. The first line segment 1192 is connected to the inner end of the aforementioned spiral 1182. 1192 constructs the volute tongue 116, and the second line segment 1194 is connected to the outer end of the spiral 1182.

On this basis, the second line segment 1194 is tangent to the end of the spiral 1182 in the cross section. By setting the second line segment 1194 to be tangent to the spiral 1182, on the one hand, the impact and friction of the oil smoke on the inner wall of the diffusion section 119 can be reduced. , on the other hand, the vortex in the diffusion section 119 can be weakened, thereby reducing the energy loss of the oil smoke in the process of flowing through the diffusion section 119 . This achieves the technical effects of optimizing the shape of the volute 110, increasing the flow rate of the hood assembly 100, and reducing the aerodynamic noise of the hood assembly 100.

As shown in Figure 19, in any of the above embodiments, the hood assembly 100 further includes: a first blocking rib 140, located at the air outlet 114; a second blocking rib 142, provided at the expansion section 119, and the first blocking rib 142. The ribs 140 are connected; in cross-section, the first rib 140 is connected to the end of the first line segment 1192, and the second rib 142 is connected to the intersection area of the first line segment 1192 and the spiral 1182.

In this embodiment, the hood assembly 100 further includes a first blocking rib 140 and a second blocking rib 142 . For example, the first blocking rib 140 is disposed at the air outlet 114, and the first blocking rib 140 can block part of the air outlet 114, the second blocking rib 142 is disposed inside the expansion section 119, and the second blocking rib 142 is connected with the third A retaining rib 140 is connected. In the aforementioned cross-section, the first end of the first blocking rib 140 is connected to the end of the first line segment 1192, the second end of the first blocking rib 140 is connected to the first end of the second blocking rib 142, and the second blocking rib 142 The second end is connected to the intersection area of the first line segment 1192 and the spiral 1182, that is, the volute tongue 116, thereby dividing a portion of the expansion section 119.

Comparing Figure 17, Figure 18, Figure 19 and Figure 20, it can be seen that by providing the first blocking rib 140 and the second blocking rib 142, the deflection angle of the oil smoke in the expansion section 119 can be reduced, thereby weakening the vortex in the expansion section 119 , thereby reducing the energy loss of the oil fume when flowing through the diffusion section 119. This achieves the technical effects of optimizing the shape of the volute 110, increasing the flow rate of the hood assembly 100, and reducing the aerodynamic noise of the hood assembly 100. For example, by combining the first blocking rib 140 and the second blocking rib 142 with the tangential design solution in the previous embodiment, the effect of eliminating the vortex inside the expansion section 119 can be achieved, thereby eliminating the impact of the vortex on the flow rate and eliminating the vortex zone. aerodynamic noise.

In any of the above embodiments, the range of the expansion angle of the expansion section 119 is: greater than or equal to 5°, And less than or equal to 12°.

In this embodiment, the expansion angle of the expansion section 119 is limited, and the expansion angle is the angle between the end straight segments of the first line segment 1192 and the second line segment 1194 . For example, the expansion angle of the expansion section 119 needs to be greater than or equal to 5° and less than or equal to 12°. By limiting the expansion angle within the above range, it is possible to avoid the formation of vortices inside the expansion section 119 on the basis of ensuring that the expansion section 119 can provide a good expansion effect for the oil smoke. This eliminates the impact of vortices on flow and eliminates aerodynamic noise caused by vortices.

For example, the expansion angle may be 8°.

As shown in Figure 21, one embodiment of the present application proposes an integrated stove 200. The integrated stove 200 includes: a heating assembly 210 for supporting and heating the container, including a flue; as in any of the above embodiments In the hood assembly 100, the air inlet 112 is connected with the flue and is used to extract oil fumes through the flue.

In this embodiment, an integrated stove 200 installed with the hood assembly 100 in any of the above embodiments is proposed. Therefore, the integrated stove 200 has the advantages of the hood assembly 100 in any of the above embodiments. The technical effects achieved by the hood assembly 100 in any of the above embodiments can be achieved. To avoid repetition, they will not be repeated here.

On this basis, the integrated stove 200 is an internal circulation integrated stove 200. The integrated stove 200 can centrally extract the oil fumes generated by cooking into the interior of the integrated stove 200, and complete the grease filtration and odor filtration inside the integrated stove 200 before returning to the integrated stove 200. It is discharged to the indoor environment where the user is located to achieve internal circulation of oil fumes, eliminating the need to set up a complex external exhaust structure.

Integrated range 200 includes heating assembly 210 . The heating assembly 210 is the main structure of the integrated stove 200 and is used to position and support other structures on the integrated stove 200 . The top of the heating component 210 can provide a cooking work surface for the user, and a container for holding ingredients is placed above the heating component 210 to support and heat the container through the heating component 210 . Thus, finished food that meets the user's needs is cooked on the heating component 210 .

A flue is formed inside the heating component 210, and the first end of the flue is connected to the space above the heating component 210. During the process of cooking food, the oil smoke is concentrated above the heating component 210, and the flue can be used for cooking food above the heating component 210. The oil fume flows into the integrated stove 200. The housing is connected to the heating component 210, and the second end of the flue is connected to the air inlet 112 on the housing. The fan is arranged in the cavity, and the fan can extract the oil fume above the heating component 210 through the cavity and the flue. For example, after the fan is turned on, the fan will blow the air in the flue The body is drawn into the fan through the cavity to form a negative pressure environment in the flue area. Under the action of this negative pressure environment, the oil fume above the heating component 210 is pressed into the flue to complete the suction of the oil fume and avoid the oil fume. spread to the indoor environment.

In any of the above embodiments, the integrated stove 200 further includes: a filter assembly 220, which is disposed in the flue and used to filter oil smoke.

In this embodiment, the integrated stove 200 is also provided with a filter assembly 220, and the filter assembly 220 is disposed in the flue. During the working process, the oil fume flowing into the flue first flows into the filter assembly 220. The filter assembly 220 separates the grease in the oil fume from the air to prevent the grease from continuing to flow into the hood along with the air. By providing the filter assembly 220, the grease in the oil fume can be prevented from adhering to the internal working structure of the integrated stove 200, thereby preventing the grease from blocking the flue and the filter on the one hand, and preventing the grease being drawn into the fan from damaging the fan on the other hand. On the other hand, the need for frequent cleaning of the internal grease of the integrated stove 200 is eliminated. This solves the technical problem of the fan being easily damaged by oil dirt and inhaling oil dirt increasing the internal cleaning burden of the integrated stove 200.

In any of the above embodiments, the integrated stove 200 further includes: a pipeline assembly 230 connected to the air outlet 114 .

In this embodiment, the integrated stove 200 further includes a pipeline assembly 230 . Pipe assembly 230 includes a pipe joint and at least one smoke exhaust pipe. When there are multiple smoke exhaust pipes, the plurality of smoke exhaust pipes are connected in series. The first end of the pipe joint is connected to the air outlet 114 on the housing, and the second end of the pipe joint is connected to the mouth of the smoke exhaust pipe. By arranging the pipeline assembly 230 , the oil fume that has been separated from grease and odor filtered can be discharged to a designated area through the pipeline assembly 230 . Specifically, a longitudinally extending pipeline assembly 230 can be provided so that the filtered air can be discharged close to the ground to reduce the possibility of the exhaust gas disturbing users. This further improves the practicality and reliability of the integrated stove 200 and optimizes the user experience.

It should be noted that in the claims, description and drawings of this application, the term "plurality" refers to two or more than two. Unless there is additional explicit limitation, the terms "upper", "lower", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of describing the present application more conveniently and making the description process simpler, and is not intended to indicate or imply that the device or element referred to must have the described characteristics. The specific orientation, construction and operation of the specific orientation, therefore these descriptions cannot be understood as limitations of the present application; the terms "connection", "installation", "fixing", etc. should be understood in a broad sense. For example, "connection" can be Fixed connections between multiple objects can also be It is a detachable connection between multiple objects, or an integrated connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

In the claims, description and drawings of this application, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means the specific features, structures described in connection with the embodiment or example , materials or features are included in at least one embodiment or example of the present application. In the claims, description and drawings of this application, schematic representations 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 any one or more embodiments or examples.

The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A cigarette machine component, which includes:

Volute, including air inlet and air outlet;

A current collecting part is provided on the volute and includes an air duct, the outlet of the air duct is connected with the air inlet;

Wherein, the inner surface of the air duct is a curved surface;

In the flow direction of the air duct, the flow area of the air duct gradually decreases.
The hood assembly according to claim 1, further comprising:

An impeller is provided in the volute, the air outlet is located on the peripheral side of the impeller, the air inlet is located on the end side of the impeller, and the diameter of the impeller is a first diameter.
The hood assembly according to claim 2, wherein the inner surface of the air duct is a conical surface.
The hood assembly according to claim 3, wherein the generatrix of the conical surface is an arc segment.
The hood assembly according to claim 3, wherein:

The diameter of the inlet of the air duct is a second diameter, and the ratio of the second diameter to the first diameter ranges from greater than or equal to 0.71 to less than or equal to 0.97.
The hood assembly according to claim 3, wherein:

The diameter of the outlet of the air duct is a third diameter, and the ratio of the third diameter to the first diameter ranges from greater than or equal to 0.64 to less than or equal to 0.88.
The hood assembly according to claim 2, wherein:

The volute further includes a volute tongue, and the end surface of the volute tongue is an arc surface;

The ratio of the radius of the end surface of the volute tongue to the first diameter ranges from greater than or equal to 0.04 to less than or equal to 0.07.
The hood assembly according to claim 7, wherein:

The distance between the volute tongue and the impeller is a first distance;

The range of the ratio of the first distance to the first diameter is: greater than or equal to 0.03 and less than or equal to 0.07.
The hood assembly according to any one of claims 2 to 8, wherein,

The volute includes a flow channel, and the flow channel includes a connected pressurizing section and a expanding section;

The impeller is located in the supercharging section, the air inlet is connected to the supercharging section, and the air outlet is connected to the expansion section.
The hood assembly according to claim 9, wherein:

Cut the volute through a plane perpendicular to the axis of the volute to obtain a cross section;

The volute enclosing the supercharging section on the cross section is in the form of a spiral, and the volute enclosing the expansion section is a first line segment and a second line segment, and the first line segment and The inner ends of the spirals are connected, and the second line segment is connected with the outer ends of the spirals;

The second line segment is tangent to the spiral.
The hood assembly according to claim 10, further comprising:

The first blocking rib is located at the air outlet;

A second retaining rib is provided in the expansion section and connected with the first retaining rib;

On the cross section, the first blocking rib connects the end of the first line segment, and the second blocking rib connects the intersection area of the first line segment and the spiral line.
The cigarette machine assembly according to claim 9, wherein the expansion angle of the expansion section ranges from greater than or equal to 5° to less than or equal to 12°.
An integrated stove, which includes:

Heating components for supporting and heating vessels, including flues;

The hood assembly according to any one of claims 1 to 12, the air inlet is connected with the flue and is used for extracting oil smoke through the flue.
The integrated stove according to claim 13, further comprising:

A filter assembly is provided in the flue and is used to filter the oil fume.
The integrated stove according to claim 13, further comprising:

A pipeline component is connected to the air outlet.