Noise reduction type integrated cooker

Abstract

The utility model discloses a noise reduction type integrated cooker which comprises a cooker body and an exhaust fume collecting hood arranged on the cooker body, an exhaust fume inlet is formed in the exhaust fume collecting hood, spoilers are arranged in an air duct cavity of the exhaust fume collecting hood, and the spoilers comprise the first spoiler and the second spoiler; a through outlet is formed in the bottom end of the exhaust fume collecting hood and defined by the side edge of the bottom of the exhaust fume collecting hood. The spoiler is arranged in the air duct cavity, an airflow path is optimized, airflow flows around the spoiler and flows along the middle of the head instead of being originally close to the rear side wall of the air duct cavity, friction between the airflow and the rear side wall of the air duct cavity is reduced, the flow speed of the airflow is increased, turbulence energy is reduced, the smoke suction efficiency is improved, noise is effectively reduced, and the smoke suction efficiency is improved. Meanwhile, the through outlet in the bottom end of the exhaust fume collecting hood is directly defined by the side edges of the bottom end of the exhaust fume collecting hood, the cross section of the through outlet is directly a through groove and is in through connection with the air duct cavity, the section change rate of the exhaust fume outlet end of the exhaust fume collecting hood is reduced, and therefore air duct system resistance and noise can be effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of integrated stoves, and in particular relates to a noise reduction integrated stove. Background Art

[0002] The current domestic kitchen design does not meet people’s demands for a better life, and the problem of “large apartments with small kitchens” is common.

[0003] Based on the above situation, integrated stoves have emerged as a comprehensive kitchen appliance that combines a range hood and a gas stove into one, and integrates multiple functions such as a disinfection cabinet, a steamer, and an oven. Existing integrated stoves make a lot of noise when in use, affecting the overall user experience. Summary of the invention

[0004] The utility model aims to provide a technical solution of a noise reduction integrated stove in view of the deficiencies in the prior art. The structural design is ingenious and reasonable. A spoiler is arranged in the air duct cavity to optimize the airflow path. The spoiler is designed as spoiler one and spoiler two. Through the multiple guiding effects of spoiler one and spoiler two, the flow direction of the airflow is changed from being close to the rear wall of the air duct cavity to bypassing the spoiler and flowing along the middle part of the head, thereby reducing the friction between the airflow and the rear wall of the air duct cavity, increasing the flow velocity of the airflow, reducing turbulent kinetic energy, improving the smoking efficiency, and effectively reducing the generation of noise, thereby enhancing the overall stability of the integrated stove and improving the performance of the equipment. At the same time, the through outlet at the bottom end of the smoke hood is directly formed by the side edges of the bottom end of the smoke hood, and the cross-section of the through outlet is directly a through groove connected to the air duct cavity, thereby reducing the cross-sectional change rate of the smoke outlet end of the smoke hood, thereby effectively reducing the resistance and noise of the air duct system.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A noise reduction integrated stove comprises a machine body and a smoke collecting hood arranged on the machine body, the smoke collecting hood is provided with a smoke inlet, the smoke inlet is connected with an air duct cavity in the smoke collecting hood, a bellows is arranged in the machine body, a volute is arranged in the bellows; a spoiler is arranged in the air duct cavity, the spoiler comprises a spoiler 1 and a spoiler 2, the spoiler 1 is arranged at the side of the smoke inlet, the spoiler 2 is arranged below the smoke inlet and located on the front side wall of the air duct cavity; a through outlet is arranged at the bottom end of the smoke collecting hood, the through outlet is formed by enclosing the bottom side of the smoke collecting hood, and the through outlet connects the air duct cavity and the bellows. A spoiler is arranged in the air duct cavity to optimize the airflow path. The spoiler is designed into spoiler one and spoiler two. Through the multiple guiding effects of spoiler one and spoiler two, the direction of the airflow is changed from originally close to the rear wall of the air duct cavity to bypassing the spoiler and flowing along the middle of the head, thereby reducing the friction between the airflow and the rear wall of the air duct cavity, increasing the flow rate of the airflow, reducing turbulent kinetic energy, improving the smoking efficiency, and effectively reducing the generation of noise, thereby enhancing the overall stability of the integrated stove and improving the performance of the equipment. At the same time, the through outlet at the bottom end of the smoke hood is directly formed by the side of the bottom end of the smoke hood, and the cross-section of the through outlet is directly connected to the air duct cavity through a through groove. No partition strips are arranged in the through outlet, thereby reducing the cross-sectional change rate of the smoke outlet end of the smoke hood, thereby effectively reducing the resistance and noise of the air duct system.

[0007] Furthermore, a smoke guide plate is provided in the air duct cavity, and the smoke guide plate is arranged opposite to the smoke inlet, and is inclined downward in the direction away from the smoke inlet, and a lighting lamp is provided on the smoke guide plate; a smoke guide plate is provided in the air duct cavity, and the smoke entering from the smoke inlet is guided by the inclined smoke guide plate, so that the smoke can flow quickly into the air duct cavity, thereby improving the smoking efficiency, and at the same time, the lighting lamp is also arranged on the inclined smoke guide plate, and the lighting lamp can provide lighting, facilitate the use of the integrated stove, and increase the user experience, and at the same time, the lighting lamp is arranged in the air duct cavity, and can be conveniently used for cleaning and maintenance of the air duct cavity without the aid of a flashlight.

[0008] Furthermore, a flap baffle is provided at the smoke inlet, and the flap baffle is connected to the driving mechanism, and the driving assembly comprises a special-shaped swing rod and an electric push rod, the special-shaped swing rod is symmetrically arranged on both sides of the flap baffle, one end of the special-shaped swing rod is fixedly connected to the flap baffle, a mounting cavity is formed between the smoke guide plate and the air duct cavity, the other end of the special-shaped swing rod extends into the mounting cavity and is hinged to the mounting frame, the mounting frame and the electric push rod are both arranged in the mounting cavity, and the electric push rod is rotatably connected to the special-shaped swing rod on the corresponding side; the flap baffle is driven to flip open or flip closed by the driving assembly to realize the opening or closing of the smoke inlet, the push rod extension and retraction of the electric push rod can drive the special-shaped swing rod to move and adjust, and the special-shaped swing rod drives the flap baffle connected thereto to adjust synchronously to close or open the smoke inlet, and when the integrated stove is not in use, the smoke inlet is closed by the flap baffle to prevent foreign matter from entering the air duct cavity, and at the same time, the size of the smoke inlet can be flexibly adjusted by adjusting the flip opening angle of the flap baffle, thereby meeting different cooking needs, the adjustment is automated, and the operation is convenient and simple.

[0009] Furthermore, a plurality of bulges are arranged on the side wall of the volute along the contour direction thereof, and the plurality of bulges are formed by the same side of the volute side wall being recessed toward the other side. At the same time, the bulges on the volute side wall are designed so that all bulges are formed by the same side of the volute being recessed toward the other side, and can be formed by recessing from the outside of the volute to the inside, or from the inside of the volute to the outside. Adaptive adjustment can be made according to design requirements, and the bulges are arranged along the outer contour of the volute, so that the bulge design is more regular, thereby effectively improving the streamline shape of the volute and improving the airflow efficiency of the equipment.

[0010] Furthermore, a collecting ring is provided at the air inlet of the volute, an air inlet hole is provided at the center of the collecting ring, a bulge ring is provided on the collecting ring, the bulge ring is distributed along the circumferential outer side of the air inlet hole, the bulge ring and the air inlet hole are arranged concentrically, and under the orthographic projection, the outer ring diameter of the bulge ring is R1, and the inner ring diameter of the bulge ring is R2, after R1 is added to R2, half of the sum of the two is taken as R3, R3 is 230-250mm, and the structural design is reasonable. In the present application, the size of the collecting ring is improved, the sum of the inner and outer ring diameters of the bulge ring is taken, and half of the sum is taken to obtain R3. Compared with the prior art, the original R3 is expanded from the existing 210mm to the current 230-250mm, thereby effectively improving the air intake performance.

[0011] Furthermore, an impeller is arranged in the volute, and blades are evenly arranged on the impeller. The impeller comprises an impeller front disk, a partition, an impeller middle disk and an impeller rear disk. Blades are evenly connected circumferentially between the impeller front disk and the partition, and between the partition and the impeller rear disk. The partition is centrally arranged between the impeller front disk and the impeller rear disk, the impeller middle disk is arranged in the inner hole of the partition, the impeller middle disk is fixedly connected to the partition, and a hollow groove is arranged on the impeller middle disk. The structural design is ingenious and reasonable. The hollow groove is arranged on the impeller middle disk, and several hollow grooves are evenly distributed circumferentially. At the same time, the partition is centrally arranged between the impeller front disk and the impeller rear disk, and the impeller middle disk is just arranged in the inner hole of the partition, so as to realize the central setting of the partition and the impeller middle disk, ensure the balance and stability of the entire impeller structure, thereby reducing the difference caused by the left-right reversing of the air duct system, balancing the left-right exhaust performance, and reducing noise to a certain extent.

[0012] Furthermore, the end point of the blade facing the center of the impeller is point a, and the points a of several blades are on the same circle, the radius of the circle is r1, and a tangent c1 is made on the blade with the center of the circle of radius r1 as the end point, and a perpendicular line d1 is made to the tangent c1, and a tangent e1 is made at point a of the blade. The angle between the tangent e1 and the perpendicular line d1 is the inlet angle A1 of the blade, and the inlet angle A1 is 70-80°. The end point of the blade away from the center of the impeller is point b, and a connecting line c2 is made from the center of the circle of radius r1 to point b, and a connecting line c2 is made at point b. The vertical line d2 is made into a tangent line e2 at point b of the blade. The angle between the tangent line e2 and the vertical line d2 is A2. The angle of 180° minus A2 is the outlet angle A3. The outlet angle A3 is 165-178°. The present application improves the design of the inlet angle and the outlet angle of the impeller blade, so that the design of the inlet angle and the outlet angle is more reasonable, which is more conducive to the optimization of the impeller air volume. In combination with the impeller upper baffle and the centering setting of the impeller middle disk, the noise during the use of the impeller can be effectively reduced, thereby improving the performance and user experience of the integrated stove.

[0013] Furthermore, under orthographic projection, the outer contour line of the volute includes a straight line segment 1, an arc segment and a straight line segment 2 connected in sequence, the straight line segment 1 and the straight line segment 2 are arranged parallel to each other, the plane where the air outlet of the volute is located is plane H, and the straight line segment 1 and the straight line segment 2 are both perpendicular to plane H. The present application further optimizes the shape of the volute, and designs the outer contour line of the volute to be a straight line segment 1, an arc segment and a straight line segment 2, and the straight line segment 1 and the straight line segment 2 are perpendicular to the plane where the air outlet of the volute is located, so that after the volute is installed in the bellows, the straight line segment 1 and the straight line segment 2 remain in a horizontal state, making the shape of the volute more regular, more convenient for actual processing, and reducing processing costs. In addition, the regular shape design of the volute makes the flow of airflow more stable and orderly, which helps to reduce noise generation and increase air volume and maximum static pressure.

[0014] Further, the bellows includes a through box body and a receiving part, the box body includes a through upper box body and a lower box body, the receiving part is arranged on the side of the upper box body, a bellows inlet is arranged on the receiving part, the bellows inlet is correspondingly connected with the air duct cavity of the smoke hood, the longitudinal sections of the upper box body and the lower box body are both rectangular structures, and the two sides of the upper box body are correspondingly flush with the two sides of the lower box body, the receiving part includes an inclined section and a vertical section, the straight-line distance between the bottom end of the inclined section and the bellows inlet is L1, and the length of L1 is 390 to 400 mm, the structure of the bellows is improved, and The distance between the bottom end of the inclined section and the bellows inlet is increased from the existing 365-380 mm to the current 390-400 mm, and the longitudinal sections of the upper box body and the lower box body are both rectangular structures, so that the box body composed of the two is also combined into a rectangular structure. The present application also reduces the width dimension of the box body of the rectangular structure, making the overall structural design more ingenious and reasonable. By adjusting the bellows structure, the overall structure of the bellows is more reasonable, the velocity gradient in the bellows is reduced, the airflow loss is reduced, and it is beneficial to increase the maximum air volume.

[0015] Furthermore, one side of the box body is side A, and the other side is side B. Under the orthographic projection, the closest distance between the arc segment of the volute and side A is L2, and the closest distance between the arc segment of the volute and side B is L3. The lengths of L2 and L3 are 46 to 59 mm. The present application improves the streamline shape of the volute, which is beneficial to improving the airflow efficiency of the equipment. At the same time, the size of the volute is improved, so that the lengths of L2 and L3 are changed from the existing 131 to 123 mm to the current 46 to 59 mm. While reducing the width of the box body, the present application also reduces the overall size of the volute, thereby reducing the space occupied by the equipment and improving performance.

[0016] The utility model has the following beneficial effects due to the adoption of the above technical solution:

[0017] The utility model has an ingenious and reasonable structural design. A spoiler is set in the air duct cavity to optimize the airflow path. The spoiler is designed into spoiler one and spoiler two. Through the multiple guiding effects of spoiler one and spoiler two, the flow direction of the airflow is changed from being close to the rear side wall of the air duct cavity to bypassing the spoiler and flowing along the middle of the head, which reduces the friction between the airflow and the rear side wall of the air duct cavity, increases the flow rate of the airflow, reduces turbulent kinetic energy, improves the smoking efficiency, and effectively reduces the generation of noise, enhances the overall stability of the integrated stove, and improves the performance of the equipment. The present application also optimizes the structure of the volute, and the shape of the volute is more regular, which is more convenient for actual processing and reduces the processing cost. The design of the regular shape of the volute makes the flow of the airflow more stable and orderly, which helps to reduce the generation of noise and increase the air volume and maximum static pressure. At the same time, the present application also adjusts the bellows structure, so that the overall structure of the bellows is more reasonable, the velocity gradient in the bellows is reduced, the airflow loss is reduced, and it is conducive to the increase of the maximum air volume. The impeller structure is further optimized to make the entire impeller structure more balanced and stable, thereby reducing the difference caused by the left-right switching of the air duct system, balancing the left and right exhaust performance, reducing noise to a certain extent, and improving the user experience of the entire equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 This is a structural schematic diagram of a noise reduction integrated stove of the utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the electric push rod and the special-shaped swing rod in the utility model;

[0021] Figure 3 A schematic diagram of the internal cross-sectional structure of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the blow box in the utility model;

[0023] Figure 5 This is a schematic diagram of the installation structure of the volute in the bellows of the utility model;

[0024] Figure 6 for Figure 5 A schematic diagram of the front structure of

[0025] Figure 7 It is a structural schematic diagram of the volute in the utility model;

[0026] Figure 8 for Figure 7 A schematic diagram of the front structure of

[0027] Fig. 9 This is a schematic diagram of the structure of the impeller in the utility model;

[0028] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure of the middle DD;

[0029] Fig.11 This is a front structural schematic diagram of the impeller in the utility model;

[0030] Fig.12 It is a schematic diagram of the planar structure of the current collecting ring in the utility model;

[0031] Fig.13 It is a three-dimensional structural schematic diagram of the current collecting ring in the utility model;

[0032] Fig.14 This is a schematic diagram of the structure in which the through outlet is at the bottom of the smoke collecting hood in the utility model;

[0033] Fig.15 It is a turbulent kinetic energy diagram of a smoke hood cross section in the prior art;

[0034] Fig.16 It is a sound pressure level diagram of the smoke hood surface in the prior art;

[0035] Fig.17 This is the turbulent kinetic energy diagram of the cross section of the improved smoke hood of the utility model;

[0036] Fig.18 It is a schematic diagram of the corresponding cross-sectional positions of S1, S2 and S3 in the bellows;

[0037] Fig.19 The streamline and velocity cloud diagram of the cross section of the bellows S1 in the prior art;

[0038] Fig. 20 The streamline and velocity cloud diagram of the cross section of the bellows S2 in the prior art;

[0039] Fig.21 The streamline and velocity cloud diagram of the cross section of the bellows S3 of the prior art;

[0040] Fig. 22 The streamline and velocity cloud diagram of the improved bellows S1 section of the utility model;

[0041] Fig.23 The improved cross-sectional streamline and velocity cloud diagram of the bellows S2 of the utility model;

[0042] Fig.24 The streamline and velocity cloud diagram of the improved bellows S3 section of the utility model;

[0043] Fig.25 It is a schematic diagram of the turbulent kinetic energy of a bellows in the prior art;

[0044] Fig.26It is a schematic diagram of the turbulent kinetic energy of the improved bellows of the utility model.

[0045] In the figure: 1-machine body; 2-smoke hood; 3-smoke inlet; 4-air duct cavity; 5-bellows box; 6-volute; 7-spoiler 1; 8-spoiler 2; 10-through outlet; 11-smoke guide plate; 12-lighting lamp; 13-flip baffle; 14-special-shaped swing rod; 15-electric push rod; 16-installation cavity; 17-bulge; 18-collector ring; 19-air inlet; 20-bulge ring; 21-impeller; 22-impeller front disc; 23-impeller middle disc; 24-impeller rear disc; 25-partition; 26-blade; 27-hollow groove; 28-straight line segment 1; 29-straight line segment 2; 30-arc segment; 31-box body; 32-receiving part; 33-bellows inlet; 34-inclined segment; 35-vertical segment; 36-mounting frame; 37-upper box body; 38-lower box body. DETAILED DESCRIPTION

[0046] like Figures 1 to 14 As shown, a noise reduction integrated stove of the utility model comprises a machine body 1 and a smoke collecting hood 2 arranged on the machine body 1, a smoke inlet 3 is arranged on the smoke collecting hood 2, the smoke inlet 3 is communicated with the air duct cavity 4 in the smoke collecting hood 2, a bellows 5 is arranged in the machine body 1, a volute 6 is arranged in the bellows 5; a spoiler is arranged in the air duct cavity 4, the spoiler comprises a spoiler 1 7 and a spoiler 2 8, the spoiler 1 7 is arranged on the side of the smoke inlet 3, the spoiler 2 8 is arranged below the smoke inlet 3 and on the front side wall of the air duct cavity 4; a through outlet 10 is arranged at the bottom end of the smoke collecting hood 2, the through outlet 10 is formed by the bottom side of the smoke collecting hood 2, and the through outlet 10 connects the air duct cavity 4 and the bellows 5. A spoiler is provided in the air duct cavity 4 to optimize the airflow path. The spoiler is designed as spoiler 1 7 and spoiler 2 8. Through the multiple guiding effects of spoiler 1 7 and spoiler 2 8, the flow direction of the airflow is changed from being close to the rear wall of the air duct cavity 4 to bypassing the spoiler and flowing along the middle of the head, thereby reducing the friction between the airflow and the rear wall of the air duct cavity 4, increasing the flow velocity of the airflow, reducing turbulent kinetic energy, improving the smoking efficiency, and effectively reducing the generation of noise, thereby enhancing the overall stability of the integrated stove and improving the performance of the equipment. At the same time, the through outlet 10 at the bottom end of the smoke hood 2 is directly formed by the side edges of the bottom end of the smoke hood 2, and the cross-section of the through outlet 10 is directly a through groove connected to the air duct cavity 4, and no partition bars are provided in the through outlet 10, thereby reducing the cross-sectional change rate of the smoke outlet end of the smoke hood 2, thereby effectively reducing the resistance and noise of the air duct system.

[0047] A smoke guide plate 11 is arranged in the air duct cavity 4, and the smoke guide plate 11 is arranged opposite to the smoke inlet 3. The smoke guide plate 11 is inclined downward in the direction away from the smoke inlet 3, and an illumination lamp 12 is arranged on the smoke guide plate 11; the smoke guide plate 11 is arranged in the air duct cavity 4, and the smoke entering from the smoke inlet 3 is guided by the inclined smoke guide plate 11, so that the smoke can flow quickly into the air duct cavity 4, thereby improving the smoking efficiency. At the same time, the illumination lamp 12 is also arranged on the inclined smoke guide plate 11. The illumination lamp 12 can provide lighting, facilitate the use of the integrated stove, and increase the user experience. At the same time, the illumination lamp 12 is just arranged in the air duct cavity 4, which can be conveniently used for cleaning and maintenance of the air duct cavity 4 without the aid of a flashlight.

[0048] A flip cover baffle 13 is provided at the smoke inlet 3, and the flip cover baffle 13 is connected to the driving mechanism. The driving assembly includes a special-shaped swing rod 14 and an electric push rod 15. The special-shaped swing rod 14 is symmetrically arranged on both sides of the flip cover baffle 13. One end of the special-shaped swing rod 14 is fixedly connected to the flip cover baffle 13. A mounting cavity 16 is formed between the smoke guide plate 11 and the air duct cavity 4. The other end of the special-shaped swing rod 14 extends into the mounting cavity 16 and is hinged to the mounting frame 36. The mounting frame 36 and the electric push rod 15 are both arranged in the mounting cavity 16. The electric push rod 15 is rotatably connected to the special-shaped swing rod 14 on the corresponding side; the driving assembly drives The smoke inlet 3 is opened or closed by flipping the flip cover baffle 13, and the extension and retraction of the electric push rod 15 can drive the special-shaped swing rod 14 to move and adjust, and the special-shaped swing rod 14 drives the flip cover baffle 13 connected thereto to adjust synchronously to close or open the smoke inlet 3. When the integrated stove is not in use, the smoke inlet 3 is closed by the flip cover baffle 13 to prevent foreign matter from entering the air duct cavity 4. At the same time, the size of the smoke inlet 3 can be flexibly adjusted by adjusting the flip opening angle of the flip cover baffle 13, so as to meet different cooking needs. The adjustment is automatic, and the operation is convenient and simple.

[0049] Several bulges 17 are arranged on the side wall of the volute 6 along the contour direction thereof, and the several bulges 17 are formed by the same side of the side wall of the volute 6 being recessed toward the other side. At the same time, the bulges 17 on the side wall of the volute 6 are designed so that all bulges 17 are recessed from the same side of the volute 6 toward the other side, and can be recessed from the outside of the volute 6 to the inside, or from the inside of the volute 6 to the outside. Adaptive adjustment can be made according to design requirements, and the bulges are arranged along the outer contour of the volute 6, so that the design of the bulges 17 is more regular, thereby effectively improving the streamline shape of the volute 6 and improving the airflow efficiency of the equipment.

[0050] A collector ring 18 is provided at the air inlet of the volute 6, an air inlet hole 19 is provided at the center of the collector ring 18, a bulge ring 20 is provided on the collector ring 18, and the bulge ring 20 is distributed along the circumferential outer side of the air inlet hole 19, and the bulge ring 20 is arranged cocentrically with the air inlet hole 19. Under the orthographic projection, the outer ring diameter of the bulge ring 20 is R1, and the inner ring diameter of the bulge ring 20 is R2. After R1 is added to R2, half of the sum of the two values ​​is taken as R3 (such as Fig.12 As shown in the length of R3 marked in the figure, R3 is 230-250mm, and the structural design is reasonable. In the present application, the size of the collector ring 18 is improved, the sum of the inner and outer ring diameters of the bulge ring 20 is taken, and then half of the added value is taken to obtain R3. Compared with the prior art, the original R3 is expanded from the existing 210mm to the current 230-250mm, thereby effectively improving the intake performance.

[0051] The volute 6 is provided with an impeller 21, on which blades 26 are evenly arranged. The impeller 21 includes an impeller front disc 22, a partition 25, an impeller middle disc 23 and an impeller rear disc 24. Blades 26 are evenly connected circumferentially between the impeller front disc 22 and the partition 25, and between the partition 25 and the impeller rear disc 24. The partition 25 is centrally arranged between the impeller front disc 22 and the impeller rear disc 24. The impeller middle disc 23 is arranged in the inner hole of the partition 25. The impeller middle disc 23 is fixedly connected to the partition 25. The impeller middle disc 23 is provided with a hollow groove 2 7. The structural design is ingenious and reasonable. A hollow groove 27 is arranged on the impeller middle disk 23. A plurality of hollow grooves 27 are evenly distributed in the circumferential direction. At the same time, the partition plate 25 is centrally arranged between the impeller front disk 22 and the impeller rear disk 24, and the impeller middle disk 23 is just arranged in the inner hole of the partition plate 25, so as to realize the central arrangement of the partition plate 25 and the impeller middle disk 23, ensure the balance and stability of the entire impeller 21 structure, thereby reducing the difference caused by the left and right reversal of the air duct system, balancing the left and right exhaust performance, and reducing noise to a certain extent.

[0052] The end point of the blade 26 facing the center of the impeller 21 is point a, and the points a of the blades 26 are on the same circle, and the radius of the circle is r1 ( Fig.10The dotted line in the figure is the circle with radius r1. Draw a tangent line c1 on blade 26 with the center of the circle with radius r1 as the endpoint, draw a perpendicular line d1 to the tangent line c1, draw a tangent line e1 at point a of blade 26, the angle between the tangent line e1 and the perpendicular line d1 is the inlet angle A1 of blade 26, the inlet angle A1 is 70-80°, the end point of blade 26 away from the center of impeller 21 is point b, draw a connecting line c2 from the center of the circle with radius r1 to point b, draw a perpendicular line d2 to the connecting line c2 at point b, draw a tangent line e2 at point b of blade 26, and the tangent line The angle between e2 and the vertical line d2 is A2, and the angle of 180° minus A2 is the outlet angle A3, and the outlet angle A3 is 165~178°. The present application improves the design of the inlet angle and the outlet angle of the impeller 21 blade 26, so that the design of the inlet angle and the outlet angle is more reasonable, which is more conducive to the optimization of the air volume of the impeller 21, and the upper partition 25 of the impeller 21 is coordinated with the central setting of the impeller middle disk 23 to optimize the entire impeller structure, thereby effectively reducing the noise during the use of the impeller 21 and improving the performance and experience of the integrated stove.

[0053] Under the orthographic projection, the outer contour line of the volute 6 includes a straight line segment 1 28, an arc segment 30 and a straight line segment 29 connected in sequence, the straight line segment 1 28 and the straight line segment 29 are arranged parallel to each other, the plane where the air outlet of the volute 6 is located is plane H, and the straight line segment 1 28 and the straight line segment 29 are both perpendicular to the plane H. The present application further optimizes the shape of the volute 6, and designs the outer contour line of the volute 6 to be a straight line segment 1 28, an arc segment 30 and a straight line segment 29, and the straight line segment 1 28 and the straight line segment 29 are perpendicular to the plane where the air outlet of the volute 6 is located, so that after the volute 6 is installed in the bellows 5, the straight line segment 1 28 and the straight line segment 29 remain in a horizontal state, making the shape of the volute 6 more regular, more convenient for actual processing, and reducing the processing cost. In addition, the regular shape design of the volute 6 makes the flow of airflow more stable and orderly, which helps to reduce the generation of noise and increase the air volume and maximum static pressure.

[0054] The bellows 5 includes a through box body 31 and a receiving portion 32, the box body 31 includes a through upper box body 37 and a through lower box body 38, the receiving portion 32 is arranged on the side of the upper box body 37, and a bellows inlet 33 is arranged on the receiving portion 32, and the bellows inlet 33 is correspondingly connected to the air duct cavity 4 of the smoke hood 2, the longitudinal sections of the upper box body 37 and the lower box body 38 are both rectangular parallelepiped structures, and the two sides of the upper box body 37 are flush with the two sides of the lower box body 38, and the receiving portion 32 includes an inclined section 34 and a vertical section 35, and the straight-line distance between the bottom end of the inclined section 34 and the bellows inlet 33 is L1, and the length of L1 is 390-400 mm, which is about The structure of the bellows 5 is improved, and the distance between the bottom end of the inclined section 34 and the bellows inlet 33 is increased from the existing 365-380 mm to the current 390-400 mm, and the longitudinal sections of the upper box body 37 and the lower box body 38 are both rectangular structures, so that the box body 31 composed of the two is also combined into a rectangular structure. The present application also reduces the width dimension of the box body of the rectangular structure, making the overall structural design more ingenious and reasonable. By adjusting the structure of the bellows 5, the overall structure of the bellows 5 is more reasonable, the velocity gradient in the bellows 5 is reduced, the airflow loss is reduced, and it is beneficial to increase the maximum air volume.

[0055] One side of the box body 31 is side A, and the other side is side B. Under the orthographic projection, the closest distance between the arc segment 30 of the volute 6 and the A side is L2, and the closest distance between the arc segment 30 of the volute 6 and the B side is L3. The lengths of L2 and L3 are 46 to 59 mm. The present application improves the streamline shape of the volute 6, which is beneficial to improving the airflow efficiency of the equipment. At the same time, the size of the volute 6 is improved, so that the lengths of L2 and L3 are changed from the existing 131 to 123 mm to the current 46 to 59 mm. While reducing the width of the box body, the present application also reduces the overall size of the volute 6, thereby reducing the space occupied by the equipment and improving performance.

[0056] Combination Figures 15 to 17 As shown, the present invention analyzes the prior art and the smoke hood of the present invention. Fig.15 It can be seen that there is a large area with a high sound pressure level on the inner wall surface of the smoke hood 2 in the prior art, indicating that the air duct structure design of the smoke hood 2 is unreasonable, which is an important source of noise for the integrated stove. The air duct of the smoke hood 2 will be one of the main optimization directions in the future. The magnitude of turbulent kinetic energy is usually proportional to the intensity and irregularity of the turbulence. Large turbulent kinetic energy will cause a large number of vortices and eddies inside the fluid, resulting in energy loss. At the same time, turbulent flow will produce noise, and high turbulent kinetic energy is usually accompanied by a greater noise level. The present application adds a spoiler in the smoke hood 2, so that the flow direction of the airflow is changed from close to the rear wall of the head to bypassing the spoiler and flowing along the middle of the head, thereby reducing the friction between the airflow and the rear wall. Therefore, the flow velocity of the airflow is increased and the turbulent kinetic energy is reduced. It will have a beneficial effect on reducing noise. By Fig.16 It can be seen that a large turbulent kinetic energy area also appears in the position corresponding to the area with higher sound pressure level in the air duct of smoke hood 2, which indicates that the air duct structure of smoke hood 2 has an unreasonable structural design. Fig.17 It can be seen that in this application, by optimizing the design of the smoke hood 2, a spoiler is added in the air duct of the smoke hood 2, so that the flow direction of the airflow is changed from being close to the rear wall of the head to bypassing the spoiler and flowing along the middle of the head, reducing the friction between the airflow and the rear wall, so that the flow velocity of the airflow is increased and the turbulent kinetic energy is reduced, which will have a beneficial effect on reducing noise.

[0057] Combination Figures 18 to 24 As shown, the present application analyzes the streamlines and velocities of the bellows at different cross sections S1, S2, and S3 in the prior art and the present application, as shown in FIG. Fig.19 It can be seen that in the prior art, there are multiple large-scale vortex structures in the air duct section S1 in front of the rear air inlet of the volute 6 in the wind box 5. Since the vortex structure is close to the rear air inlet of the volute 6, it will cause strong disturbance to the airflow entering the volute 6 through the rear air inlet, hindering the normal airflow movement of the fan system, thereby causing airflow loss, reducing the air volume of the whole machine, and increasing the noise. Fig.21 It can be seen that, similar to the S1 duct section, the S3 section shows the airflow in the duct in front of the main air inlet of the volute 6. By observing the streamline structure, it can be clearly seen that there is also a large-scale vortex structure there, which affects the movement of the airflow near the main air inlet of the volute 6, resulting in a reduction in the overall flow of the fan system. At the same time, the vortex structure is one of the main reasons for the generation of noise in the integrated stove duct. The vortex area near the air inlet of the volute 6 will block the air duct pipeline, causing local resistance in the air duct, resulting in airflow loss, and thus reducing the exhaust efficiency of the smoke exhaust system. Figures 22 to 24 It can be seen that in the present application, the air volume of the whole machine is increased and the noise is reduced accordingly by optimizing and improving the structure of the bellows 5. This is because the vortex structure in the air duct near the front and rear air inlets of the volute 6 is significantly weakened and reduced after the modification, and the obstruction effect of the vortex structure on the air flow movement in the air duct is reduced. The noise caused by the vortex structure generated by the irregular movement of the fluid is also reduced accordingly. Moreover, at the same speed, it can be seen from the velocity cloud map inside the bellows that the overall flow velocity of the fan system of the optimized scheme is higher than that of the prototype fan system, the velocity profile is smoother, and the high-speed area is closer to the collecting ring 18.

[0058] Combination Fig.25 and Fig.26 As shown, the present invention analyzes the turbulent kinetic energy inside the bellows of the prior art and the present invention, and comprehensively Fig.25 and Fig.26 From the turbulent kinetic energy comparison shown, it is obvious that the present application reduces the velocity gradient between the bellows and reduces the airflow loss by adjusting and improving the bellows structure, which is beneficial to the increase of the maximum air volume.

[0059] The present application also conducted an air volume test experiment, and conducted air volume tests on the integrated stove before improvement and the integrated stove after improvement in the present application, and obtained the following experimental data.

[0060]

[0061] Table 1 Test results of integrated stoves before modification

[0062]

[0063] Table 2 Test results of the improved integrated stove

[0064] According to the data comparison of Table 1 and Table 2, it is obvious that the air duct cavity 4 of the integrated stove is improved in this application, and the key components such as the volute 6 and impeller 21 of the fan system are optimized, so that the air volume of the optimized integrated stove is increased by about 0.8m³ / min. The maximum static pressure of the prototype is only 997.14Pa, while the maximum static pressure of the optimized solution can be 1097.59Pa, which increases the maximum static pressure by about 100 Pa. The air performance optimization effect is significant. In addition to not using physical noise reduction methods, the noise of the existing integrated stove has been greatly reduced by optimizing air flow and improving the internal flow field of the box and volute 6. By comparing the integrated stove before improvement, the noise of the optimized integrated stove has dropped by about 3.7dB. A breakthrough in large air volume and low noise technology has been achieved, which has greatly improved market competitiveness.

[0065] The utility model has an ingenious and reasonable structural design. A spoiler is set in the air duct cavity to optimize the airflow path. The spoiler is designed into spoiler one and spoiler two. Through the multiple guiding effects of spoiler one and spoiler two, the flow direction of the airflow is changed from being close to the rear side wall of the air duct cavity to bypassing the spoiler and flowing along the middle of the head, which reduces the friction between the airflow and the rear side wall of the air duct cavity, increases the flow rate of the airflow, reduces turbulent kinetic energy, improves the smoking efficiency, and effectively reduces the generation of noise, enhances the overall stability of the integrated stove, and improves the performance of the equipment. The present application also optimizes the structure of the volute, and the shape of the volute is more regular, which is more convenient for actual processing and reduces the processing cost. The design of the regular shape of the volute makes the flow of the airflow more stable and orderly, which helps to reduce the generation of noise and increase the air volume and maximum static pressure. At the same time, the present application also adjusts the bellows structure, so that the overall structure of the bellows is more reasonable, the velocity gradient in the bellows is reduced, the airflow loss is reduced, and it is conducive to the increase of the maximum air volume. The impeller structure is further optimized to make the entire impeller structure more balanced and stable, thereby reducing the difference caused by the left-right switching of the air duct system, balancing the left and right exhaust performance, reducing noise to a certain extent, and improving the user experience of the entire equipment.

[0066] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A noise reduction integrated stove, comprising a machine body and a smoke collecting hood arranged on the machine body, the smoke collecting hood being provided with a smoke inlet, the smoke inlet being communicated with an air duct cavity in the smoke collecting hood, a bellows being arranged in the machine body, and a volute being arranged in the bellows; Features: A spoiler is arranged in the air duct cavity, and the spoiler includes a first spoiler and a second spoiler. The first spoiler is arranged on the side of the smoke inlet, and the second spoiler is arranged below the smoke inlet and on the front side wall of the air duct cavity. A through outlet is arranged at the bottom end of the smoke collecting hood, and the through outlet is formed by the bottom side of the smoke collecting hood, and the through outlet communicates with the air duct cavity and the wind box.

2. The noise reduction integrated stove according to claim 1, characterized in that: A smoke guide plate is arranged in the air duct cavity, the smoke guide plate is arranged opposite to the smoke inlet, the smoke guide plate is arranged to be inclined downward in a direction away from the smoke inlet, and an illuminating lamp is arranged on the smoke guide plate.

3. The noise reduction integrated stove according to claim 2, characterized in that: A flip cover baffle is arranged at the smoke inlet, and the flip cover baffle is connected to a driving assembly, and the driving assembly includes a special-shaped swing rod and an electric push rod, the special-shaped swing rod is symmetrically arranged on both sides of the flip cover baffle, one end of the special-shaped swing rod is fixedly connected to the flip cover baffle, and an installation cavity is formed between the smoke guide plate and the air duct cavity, the other end of the special-shaped swing rod extends into the installation cavity and is hinged to a mounting frame, the mounting frame and the electric push rod are both arranged in the installation cavity, and the electric push rod is rotatably connected to the special-shaped swing rod on the corresponding side.

4. The noise reduction integrated stove according to claim 1, characterized in that: A plurality of bulges are arranged on the side wall of the volute along the contour direction thereof, and the plurality of bulges are formed by depressions from the same side of the side wall of the volute toward the other side.

5. The noise reduction integrated stove according to claim 1, characterized in that: A collecting ring is arranged at the air inlet of the volute, an air inlet hole is arranged at the center of the collecting ring, a bulge ring is arranged on the collecting ring, the bulge ring is distributed along the circumferential outer side of the air inlet hole, the bulge ring and the air inlet hole are arranged concentrically, and under orthographic projection, the outer ring diameter of the bulge ring is R1, and the inner ring diameter of the bulge ring is R2, after R1 is added to R2, half of the sum of the two values ​​is taken as R3, and R3 is 230-250mm.

6. The noise reduction integrated stove according to claim 1, characterized in that: An impeller is arranged in the volute, and blades are evenly arranged on the impeller. The impeller comprises an impeller front disk, a partition, an impeller middle disk and an impeller rear disk. The blades are evenly connected circumferentially between the impeller front disk and the partition, and between the partition and the impeller rear disk. The partition is centrally arranged between the impeller front disk and the impeller rear disk, the impeller middle disk is arranged in the inner hole of the partition, the impeller middle disk is fixedly connected to the partition, and a hollow groove is arranged on the impeller middle disk.

7. The noise reduction integrated stove according to claim 6, characterized in that: The end point of the blade facing the center of the impeller is point a, and the points a of several blades are on the same circle, the radius of the circle is r1, and a tangent c1 is made on the blade with the center of the circle with radius r1 as the end point, and a perpendicular line d1 of the tangent c1 is made, and a tangent e1 at point a of the blade is made, and the angle between the tangent e1 and the perpendicular line d1 is the inlet angle A1 of the blade, and the inlet angle A1 is 70-80°. The end point of the blade away from the center of the impeller is point b, and a connecting line c2 is made from the center of the circle with radius r1 to point b, and a perpendicular line d2 of the connecting line c2 is made at point b, and a tangent e2 at point b of the blade is made, and the angle between the tangent e2 and the perpendicular line d2 is A2, and the angle obtained by subtracting 180° from A2 is the outlet angle A3, and the outlet angle A3 is 165-178°.

8. The noise reduction integrated stove according to claim 1, characterized in that: Under orthographic projection, the outer contour line of the volute includes a straight line segment 1, an arc segment and a straight line segment 2 connected in sequence, the straight line segment 1 and the straight line segment 2 are arranged parallel to each other, the plane where the air outlet of the volute is located is plane H, and the straight line segment 1 and the straight line segment 2 are both perpendicular to the plane H.

9. The noise reduction integrated stove according to claim 1, characterized in that: The bellows comprises a through box body portion and a receiving portion, the box body portion comprises a through upper box body portion and a through lower box body portion, the receiving portion is arranged on the side of the upper box body portion, a bellows inlet is arranged on the receiving portion, the bellows inlet is correspondingly connected with the air duct cavity of the smoke hood, the longitudinal sections of the upper box body portion and the lower box body portion are both rectangular structures, and the two sides of the upper box body portion are correspondingly flush with the two sides of the lower box body portion, the receiving portion comprises an inclined section and a vertical section, the straight-line distance between the bottom end of the inclined section and the bellows inlet is L1, and the length of L1 is 390 to 400 mm.

10. The noise reduction integrated stove according to claim 9, characterized in that: One side of the box body is side A, and the other side is side B. Under orthographic projection, the closest distance between the arc segment of the volute and side A is L2, and the closest distance between the arc segment of the volute and side B is L3. The lengths of L2 and L3 are 46 to 59 mm.

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