Large-pressure oil smoke pipeline fan

Abstract

The invention discloses a large-pressure oil smoke pipeline fan which comprises a pipeline assembly, a draught fan assembly, a draught fan assembly and a fan assembly. The pipeline assembly is provided with a circular concave cavity and at least two opening channels communicated with an inlet and an outlet of the circular concave cavity. And the centrifugal cavity assembly is arranged in the circular concave cavity and provided with an outer-layer separation cavity and an inner-layer centrifugal cavity, and the turbofan and the hexagonal frame rotate at the same time at a constant rotating speed ratio. According to the invention, the operation mode that the double-layer separation cavity and the centrifugal cavity assist each other is adopted, and the compression type gas discharge device and the turbofan are combined with each other, so that the defect that the exhaust of the compression type gas discharge device has pulse performance is avoided; meanwhile, the two ends of the fan are completely isolated, and normal operation can be achieved under the condition that a certain air pressure difference exists inside and outside.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline fans, and in particular relates to a high-pressure oil fume pipeline fan. Background Art

[0002] As an important part of the range hood, the performance of the range hood duct fan directly affects the exhaust effect and overall user experience of the range hood. At present, by introducing advanced motor technology and optimizing the air duct design, the exhaust volume and static pressure of the fan are improved, so that the range hood can maintain efficient exhaust effect when dealing with different cooking scenarios. However, the fan is directly connected to the air intake area, making it difficult for the range hood to isolate the noise generated by the high-speed rotation of the fan, and has the defect of high noise.

[0003] At the same time, piston compressors can also achieve some of the effects of oil fume fans. However, piston compressors achieve gas compression and exhaust through the reciprocating motion of the piston in the cylinder; due to the low speed and the characteristics of its reciprocating motion, the speed of the compression mechanism is limited, making the exhaust efficiency of the machine low, but it has the characteristic of resisting the internal and external pressure difference; at the same time, it has the defect of discontinuous exhaust, which produces air flow pulsation and causes additional pressure on subsequent pipeline equipment.

[0004] In the prior art, a variety of methods have been designed to reduce the noise caused by high-speed fans. Among them, the invention patent with publication number CN113374740B records a silencer buffer for a duct fan with a silencer function, which can weaken the working noise of the fan body, greatly weaken the mechanical noise generated during the operation of the fan, and reduce the impact on the external environment; the invention patent with publication number CN105422484B records a low-noise intelligent duct fan based on the Internet of Things, which provides the best flow direction for air through a guide plate to ensure that the sound of air flow is minimized, thereby improving the low-noise effect of the duct fan, and then further improves the low-noise effect of the duct fan by accurately measuring the sound through the sound detection circuit and accurately controlling the motor through the voltage regulation circuit; it can be seen that the duct fan has unbearable strong noise, which is a technical problem that needs to be solved many times in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a high-pressure oil fume duct fan in order to combine the advantages of high efficiency and stable operation of a turbofan, and the advantages of low noise and resistance to internal and external pressures when the compressor runs at a low speed, and at the same time avoid the defects of difficulty in isolating noise when the turbofan rotates at a high speed, and low exhaust efficiency and pulsed exhaust when the compressor runs at a low speed.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A high-pressure oil fume duct fan, comprising:

[0008] A pipe assembly having a circular cavity and at least two open passages connected to an inlet and an outlet of the circular cavity; and

[0009] A centrifugal chamber assembly is arranged in a circular concave cavity, the centrifugal chamber assembly has an outer partition chamber and an inner centrifugal chamber, the partition chamber and the centrifugal chamber have a rotatable hexagonal frame as a boundary, the partition chamber is divided into multiple cavities by movable partitions extending from the corners of the hexagonal frame to the inner wall of the circular concave cavity, and a turbofan is provided at the center of the centrifugal chamber to blow air from one or more cavities to the other cavity, and the turbofan and the hexagonal frame rotate simultaneously at a constant speed ratio.

[0010] In which, the duct fan also includes a cover plate assembly, which is configured to cooperate with the circular concave cavity and the openings above at least two opening channels to form an upper cover of a sealed cavity, the upper cover is provided with a first air hole channel near the turbofan, and the upper cover is provided with a second air hole channel near the cavity that is not connected to the two opening channels, and a connecting airway is connected between the first air hole channel and the second air hole channel.

[0011] Wherein, an annular cover is rotatably connected to the inner side of the hexagonal frame, and the side walls of the hexagonal frame are provided with lateral air ports communicating with the inside and outside;

[0012] A connecting port is provided on the side of the annular cover to communicate with the lateral air port, and the cavity connected to the opening channel of the circular concave cavity outlet is connected with the cavity at the turbofan through the connecting port.

[0013] Among them, the movable partition is provided with a movable guide shaft at the inner wall of the circular cavity, the circular cavity is provided with a lower circular guide rail that cooperates with the movable guide shaft to slide, and the upper cover is provided with an upper circular guide rail that cooperates with the movable guide shaft to slide.

[0014] Among them, a motor is installed on the side of the circular cavity away from the upper cover through a fixing plate, the output end of the motor passes through the side wall of the upper cover and extends to be fixed to the turbofan, and a bearing is installed in the gap between the output end of the motor and the annular cover.

[0015] Among them, the output shaft of the motor does not coincide with the central axis of the circular cavity, the centers of at least two of the opening channels do not coincide with the central axis of the circular cavity, and the output shaft of the motor is arranged to be close to the opening channel of the circular cavity outlet.

[0016] Among them, a driving gear is also installed in the middle section of the connection between the output end of the motor and the turbofan, and at least three driven gears that are rotatably connected to form a meshing connection with the driving gear are rotated in the circular concave cavity. A toothed ring is fixed to the bottom of the hexagonal frame, and at least three of the driven gears are meshed with the meshing teeth of the toothed ring on one side away from the driving gear for transmission.

[0017] The circular cavity is provided with a driving assembly cavity for accommodating the driving gear, the toothed ring and at least three of the driven gears for rotation.

[0018] There are three movable partitions, and the three movable partitions are rotatably connected to the corners of the hexagonal frame respectively, and the rotational connection points between the three movable partitions and the hexagonal frame are equidistant from each other.

[0019] Among them, the duct fan also includes a fixing component for fixing the duct component and the cover plate component, the fixing component is configured as a plurality of bolts, the circular concave cavity and the side walls of at least two opening channels are provided with through holes for matching the bolts to pass through, and the upper cover is also provided with through holes corresponding to the through holes, and the plurality of bolts are respectively passed through and fixed to the mounting holes formed after the through holes are connected with the corresponding through holes.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0021] 1. In the present invention, a double-layer separation chamber and a centrifugal chamber are used to assist each other in operation, and a compressed gas discharge device and a turbofan blower are combined with each other. The turbofan blower accelerates the working efficiency of the compressed gas discharge device, thereby avoiding the defect of too low efficiency of the compressed gas discharge device. The turbofan is used to discharge air at the air outlet, thereby avoiding the defect of pulsed exhaust of the compressed gas discharge device. At the same time, it has the advantage of complete isolation of both ends of the blower, and can operate normally under a certain pressure difference between the inside and the outside.

[0022] 2. In the present invention, a structure of turbofan accelerating gas centrifugal discharge is adopted. When the movable partition squeezes the cavity, the turbofan sucks and accelerates the oil fume exhaust gas inside the cavity, and directly discharges the exhaust gas to the external exhaust port after acceleration. During the whole process, the turbofan is completely isolated from the exhaust gas inlet. While the hexagonal frame rotating at a low speed can operate stably and quietly, it is beneficial to isolate the noise generated by the turbofan during operation and reduce the noise generated by the duct fan.

[0023] 3. In the present invention, a synchronous driving mechanism of a turbofan and a hexagonal frame is adopted, and the rotation speed of the turbofan is greater than that of the hexagonal frame, so that the separation chamber and the centrifugal chamber can realize their respective functions while reducing the setting of multiple driving structures, making the overall structure more concise and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the angled cross-section structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the horizontal cross-section structure of the present invention;

[0028] Figure 5 It is a schematic diagram of the vertical cross-section structure of the turbofan in the present invention;

[0029] Figure 6 It is a schematic diagram of the horizontal cross-section structure of the connecting airway in the present invention;

[0030] Figure 7 It is a schematic diagram of the vertical cross-section structure of the driven gear in the present invention.

[0031] Markings in the figure: 1, pipeline assembly; 11, circular concave cavity; 12, opening channel; 13, lower circular guide rail; 14, driving assembly cavity; 15, motor; 16, driving gear; 17, driven gear; 18, fixing plate;

[0032] 2. Fixing assembly; 21. Bolt;

[0033] 3. Cover plate assembly; 31. Upper cover; 32. Upper circular guide rail; 33. Connecting air passage; 34. First air hole passage; 35. Second air hole passage;

[0034] 4. Centrifugal chamber assembly; 41. Hexagonal frame; 42. Lateral air port; 43. Annular cover; 44. Connecting port; 45. Movable partition; 46. Movable guide shaft; 47. Turbofan; 48. Bearing; 49. Toothed ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Embodiment 1, refer to Figure 1-7 , a large pressure oil fume duct fan, comprising:

[0037] A pipe assembly 1, the pipe assembly 1 has a circular cavity 11 and at least two open channels 12 connected to the inlet and outlet of the circular cavity 11; and a centrifugal chamber assembly 4 arranged in the circular cavity 11, the centrifugal chamber assembly 4 has an outer layer partition chamber and an inner layer centrifugal chamber, the partition chamber and the centrifugal chamber are bounded by a rotatable hexagonal frame 41, the partition chamber is divided into a plurality of cavities by a movable partition plate 45 extending from the corner of the hexagonal frame 41 to the inner wall of the circular cavity 11, and a turbofan 47 is provided at the center of the centrifugal chamber to blow air from one or more cavities to another cavity, and the turbofan 47 and the hexagonal frame 41 rotate simultaneously at a constant speed ratio;

[0038] When in use, the open channel 12 is connected to the external oil fume duct. By rotating the hexagonal frame 41, the hexagonal frame 41 can divide the partition cavity into three cavities that are not connected to each other through the movable partition 45. Among them, the cavity with the largest volume is connected to the open channel 12 at the inlet, and the cavity with the smallest volume is connected to the open channel 12 at the outlet. The cavity in the middle of the three cavities is closed, and the three cavities are set to the initial state at this time.

[0039] When the hexagonal frame 41 rotates clockwise, the cavity with the smallest volume in the initial state is no longer connected to the open channel 12 at the outlet, and the volume begins to increase with the rotation. Since the cavity is closed at this time, the air pressure in the cavity begins to decrease with the increase of the volume; the cavity in the middle of the volume in the initial state is connected to the open channel 12, and the volume decreases with the rotation, so the gas in the cavity is compressed and pressurized and discharged to the open channel 12 at the outlet; the cavity with the largest volume in the initial state is no longer connected to the open channel 12 at the inlet, and the volume decreases with the rotation, so that the gas filled in the cavity is compressed; the above state changes continue to occur with the rotation of the hexagonal frame 41, forming an effect of transporting the air in the open channel 12 at the inlet to the open channel 12 area at the outlet;

[0040] Furthermore, when the turbofan 47 and the hexagonal frame 41 rotate simultaneously at a constant speed ratio, the turbofan 47 also rotates simultaneously during the rotation of the hexagonal frame 41. At this time, the centrifugal chamber and the cavity are connected through the connecting airway 33, and the cavity connected by the connecting airway 33 is always under compression, so that the air in the cavity can provide the connecting airway 33 to enter the centrifugal chamber when compressed, and then the rotation of the turbofan 47 inside the centrifugal chamber is accelerated to discharge the air to the cavity at the opening channel 12 near the outlet, thereby achieving the effect of simultaneous rotation of the inner and outer layers and simultaneous unidirectional air delivery, increasing the air guiding effect of the device when extracting oil fume air, and realizing physical isolation between the two opening channels 12. Even in the case of a certain pressure difference between the two opening channels 12, the duct fan can still operate stably.

[0041] The duct fan further includes a cover plate assembly 3, which is configured to be an upper cover 31 that cooperates with the circular concave cavity 11 and the openings above at least two opening channels 12 to form a sealed cavity, the upper cover 31 is provided with a first air hole channel 34 near the turbofan 47, the upper cover 31 is provided with a second air hole channel 35 near the cavity that is not connected to the two opening channels 12, and a connecting air channel 33 is connected between the first air hole channel 34 and the second air hole channel 35;

[0042] Specifically, the upper cover 31 is used to cover and seal the circular cavity 11 and the upper part of the opening channel 12. At the same time, the centrifugal cavity can be connected with one of the sealed cavities through the connecting airway 33, so as to achieve the effect of isolated transportation of air through the separation cavity and then accelerate the air transportation efficiency through the centrifugal cavity.

[0043] Among them, an annular cover 43 is rotatably connected to the inner side of the hexagonal frame 41, and the side walls of the hexagonal frame 41 are provided with lateral air ports 42 that are connected to the inside and outside; a connecting port 44 that is connected to the lateral air port 42 is opened on the side of the annular cover 43, and the cavity connected to the opening channel 12 at the outlet of the circular cavity 11 is connected to the cavity at the turbofan 47 through the connecting port 44; a movable guide shaft 46 is provided at the inner wall of the movable partition 45 that fits the circular cavity 11, and a lower circular guide rail 13 that cooperates with the sliding of the movable guide shaft 46 is opened in the circular cavity 11, and an upper circular guide rail 32 that cooperates with the sliding of the movable guide shaft 46 is opened on the upper cover 31.

[0044] Specifically, on one hand, the lateral air port 42 and the connecting port 44 are arranged in cooperation, so that during the rotation of the hexagonal frame 41, the lateral outlet of the centrifugal chamber is always connected with the cavity near the opening channel 12 at the outlet; the movable guide shaft 46 is arranged, so that during the rotation of the hexagonal frame 41, the movable partition 45 is always limited and in contact with the inner wall of the circular concave cavity 11, so that each cavity is always separated by the movable partition 45, avoiding "series leakage" between multiple cavities;

[0045] On the other hand, by setting the lower circular guide rail 13 and the upper circular guide rail 32, during the operation of the duct fan, the accumulated oil smoke impurities can be more easily scraped into the two concave lower circular guide rails 13 and the upper circular guide rail 32, which is beneficial to the normal operation of the entire equipment.

[0046] Among them, a motor 15 is installed on the side of the circular cavity 11 away from the upper cover 31 through a fixing plate 18, and the output end of the motor 15 passes through the side wall of the upper cover 31 and extends to be fixed to the turbofan 47, and a bearing 48 is installed in the gap between the output end of the motor 15 and the annular cover 43; a driving gear 16 is also installed in the middle section of the connection between the output end of the motor 15 and the turbofan 47, and at least three driven gears 17 that are meshed with the driving gear 16 are rotatably connected in the circular cavity 11, and a toothed ring 49 is fixed to the bottom of the hexagonal frame 41, and at least three driven gears 17 that are away from the driving gear 16 are meshed with the meshing teeth of the toothed ring 49 for transmission.

[0047] Specifically, the motor 15 is configured to drive the turbofan 47 to rotate actively and simultaneously drive the driving gear 16 to rotate. During the rotation of the driving gear 16, the driven gear 17 meshing with the driving gear 16 is driven to rotate. The rotation of the driven gear 17 further drives the toothed ring 49 to rotate, and further drives the hexagonal frame 41 to rotate, thereby achieving the effect that the hexagonal frame 41 and the turbofan 47 rotate simultaneously and at unequal rotation speeds.

[0048] The output shaft of the motor 15 does not coincide with the central axis of the circular cavity 11, and the centers of at least two opening channels 12 do not coincide with the central axis of the circular cavity 11. The output shaft of the motor 15 is arranged to be close to the opening channel 12 at the outlet of the circular cavity 11. The circular cavity 11 is provided with a driving assembly cavity 14 for accommodating the rotation of the driving gear 16, the toothed ring 49 and at least three driven gears 17. There are three movable baffles 45, and the three movable baffles 45 are respectively connected to the corners of the hexagonal frame 41 for rotation, and the rotation connection points of the three movable baffles 45 and the hexagonal frame 41 are equidistant from each other.

[0049] Specifically, the position of the motor 15 on the circular cavity 11 is set so that the three cavities in the separation cavity are always in a state of gradual volume change during the rotation of the hexagonal frame 41, so as to realize the transportation of oil fume gas. At the same time, the airway connected to the outside at the connecting port 44 is opposite to the opening channel 12, which makes it convenient for the turbofan 47 to directly discharge the accelerated oil fume exhaust gas through the connecting port 44.

[0050] The duct fan further includes a fixing assembly 2 for fixing the duct assembly 1 and the cover assembly 3. The fixing assembly 2 is provided with a plurality of bolts 21. The circular cavity 11 and the side walls of at least two opening channels 12 are provided with through holes for the bolts 21 to penetrate. The upper cover 31 is also provided with through holes corresponding to the through holes. The plurality of bolts 21 are respectively penetrated and fixed in the mounting holes formed after the through holes are connected with the through holes.

[0051] Specifically, the fixing assembly 2 can also fix the pipe assembly 1 and the cover assembly 3 by other means not limited to the bolts 21, including snap-fit ​​and adhesive connection methods.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure oil fume duct fan, characterized in that: include: A pipeline assembly (1), the pipeline assembly (1) comprising a circular cavity (11) and at least two open channels (12) connected to an inlet and an outlet of the circular cavity (11); And a centrifugal chamber assembly (4) arranged in a circular concave cavity (11), the centrifugal chamber assembly (4) comprising an outer layer partition cavity and an inner layer centrifugal cavity, the partition cavity and the centrifugal cavity having a rotatable hexagonal frame (41) as a boundary, the partition cavity being divided into a plurality of cavities by a movable partition plate (45) extending from a corner of the hexagonal frame (41) toward the inner wall of the circular concave cavity (11), the center of the centrifugal cavity having a turbofan (47) for blowing air from one or more cavities to another cavity, the turbofan (47) and the hexagonal frame (41) rotating simultaneously at a constant speed ratio.

2. A high-pressure oil fume duct fan as claimed in claim 1, characterized in that: The duct fan further comprises a cover plate assembly (3), wherein the cover plate assembly (3) is configured to be an upper cover (31) that cooperates with the circular concave cavity (11) and the openings above at least two opening channels (12) to form a sealed cavity, wherein the upper cover (31) is provided with a first air hole channel (34) near the turbofan (47), and the upper cover (31) is provided with a second air hole channel (35) near a cavity that is not connected to the two opening channels (12), and a connecting air channel (33) is connected between the first air hole channel (34) and the second air hole channel (35).

3. A high-pressure oil fume duct fan as claimed in claim 2, characterized in that: An annular cover (43) is rotatably connected to the inner side of the hexagonal frame (41), and the side walls of the hexagonal frame (41) are provided with lateral air ports (42) communicating with the inside and outside; The side of the annular cover (43) is provided with a communication port (44) which is connected to the lateral air port (42); the cavity connected to the opening channel (12) at the outlet of the circular cavity (11) is connected to the cavity at the turbofan (47) through the communication port (44).

4. A high-pressure oil fume duct fan as claimed in claim 3, characterized in that: A movable guide shaft (46) is arranged at the inner wall of the movable partition (45) which is in contact with the circular cavity (11); a lower circular guide rail (13) which is slidably matched with the movable guide shaft (46) is provided in the circular cavity (11); and an upper circular guide rail (32) which is slidably matched with the movable guide shaft (46) is provided on the upper cover (31).

5. The high-pressure oil fume duct fan according to claim 1, characterized in that: A motor (15) is installed on one side of the circular cavity (11) away from the upper cover (31) via a fixing plate (18); an output end of the motor (15) passes through a side wall of the upper cover (31) and extends to be fixed to the turbofan (47); a bearing (48) is installed at a gap between the output end of the motor (15) and the annular cover (43).

6. A high-pressure oil fume duct fan as claimed in claim 5, characterized in that: The output shaft of the motor (15) does not coincide with the central axis of the circular cavity (11), and the centers of at least two of the opening channels (12) do not coincide with the central axis of the circular cavity (11). The output shaft of the motor (15) is arranged to be close to the opening channel (12) at the outlet of the circular cavity (11).

7. A high-pressure oil fume duct fan as claimed in claim 5, characterized in that: A driving gear (16) is also installed in the middle section of the connection between the output end of the motor (15) and the turbofan (47); at least three driven gears (17) are rotatably connected in the circular cavity (11) and are meshed with the driving gear (16); a toothed ring (49) is fixed to the bottom of the hexagonal frame (41); and at least three of the driven gears (17) are meshed with the meshing teeth of the toothed ring (49) on one side away from the driving gear (16) for transmission.

8. A high-pressure oil fume duct fan as claimed in claim 7, characterized in that: The circular cavity (11) is provided with a driving assembly cavity (14) for accommodating the rotation of a driving gear (16), a toothed ring (49) and at least three driven gears (17).

9. The high-pressure oil fume duct fan according to claim 1, characterized in that: The movable partitions (45) are provided in three numbers, and the three movable partitions (45) are respectively rotatably connected to the corners of the hexagonal frame (41), and the rotational connection points of the three movable partitions (45) and the hexagonal frame (41) are spaced equally from each other.

10. A high-pressure oil fume duct fan according to any one of claims 1 to 9, characterized in that: The duct fan further comprises a fixing assembly (2) for fixing the duct assembly (1) and the cover assembly (3), wherein the fixing assembly (2) is configured as a plurality of bolts (21), and the side walls of the circular cavity (11) and at least two opening channels (12) are provided with through holes for the bolts (21) to penetrate, and the upper cover (31) is also provided with through holes corresponding to the through holes, and the plurality of bolts (21) are respectively penetrated and fixed in the mounting holes formed after the through holes are connected to the corresponding through holes.

Images