CN218093493U

CN218093493U - Fan system for range hood and range hood

Info

Publication number: CN218093493U
Application number: CN202221410913.7U
Authority: CN
Inventors: 何海涛; 吴灵辉; 郑聪; 许滔; 刘钰琢
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-12-20
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a fan system and range hood for range hood, a fan system for range hood includes first impeller, its characterized in that: the fan system also includes a second impeller, the first and second impellers being coaxially arranged and rotating in opposite directions, the first impeller being located upstream of the second impeller in the path of the lampblack flow. Compared with the prior art, the utility model has the advantages of: the pneumatic efficiency and the grease separation rate of a fan system can be improved, and the abrasion of a motor shaft caused by the fact that a single impeller generates torque force with opposite angular speeds to a motor can be reduced.

Description

Fan system for range hood and range hood

Technical Field

The utility model relates to an oil smoke purifier, especially a range hood.

Background

The fume exhauster is a kitchen appliance for purifying kitchen environment, and can quickly exhaust the waste burned by the stove and the fume generated in the cooking process to the outside, reduce pollution, purify air and the like.

The utility model discloses a range hood as application number 202122457881.8's chinese utility model patent discloses, including having the main casing body that holds the chamber, the one end of the main casing body is seted up the intercommunication and is held the gas outlet in chamber, and the collection petticoat pipe is installed in the other end of the relative gas outlet of the main casing body, and fan assembly accept and is held in holding the intracavity and be located between gas outlet and the collection petticoat pipe.

The fan system of the existing range hood mostly adopts a single centrifugal impeller, the pneumatic efficiency and the grease separation efficiency are low, the unidirectional rotation of the single impeller can generate a torque force with opposite angular speed to a motor, and the force can cause the abrasion of a motor shaft.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that to the not enough of above-mentioned prior art existence, provide a fan system for range hood, can promote pneumatic efficiency and grease separation rate, can also alleviate the single-vane wheel to the motor produces the opposite moment of torsion of angular velocity and the motor shaft wearing and tearing that cause.

The utility model aims to solve the second technical problem that a range hood that uses there is above-mentioned fan system is provided.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: the utility model provides a fan system for range hood, includes first impeller, its characterized in that: the fan system also includes a second impeller, the first and second impellers being coaxially arranged and rotating in opposite directions, the first impeller being located upstream of the second impeller in the path of the lampblack flow.

Preferably, in order to facilitate direct absorption and direct discharge of the oil fume, the first impeller is a centrifugal impeller, and the second impeller is an axial-flow impeller.

In order to drive the two impellers to rotate reversely, a first rotating shaft in linkage is arranged on the first impeller, a second rotating shaft in linkage is arranged on the second impeller, the first rotating shaft and the second rotating shaft are coaxially arranged, and the fan system further comprises a moving mechanism for driving the first rotating shaft and the second rotating shaft to rotate along opposite directions.

Preferably, the reverse rotation of the two rotating shafts is realized through the matching of the motor and the belt wheels, specifically, the moving mechanism comprises a motor, a first belt wheel, a second belt wheel, a third belt wheel, a fourth belt wheel and a transmission belt, the motor comprises a motor main body and a motor shaft assembly rotatably arranged on the motor main body, the first belt wheel is sleeved on the motor shaft assembly and is driven to rotate by the motor shaft assembly, the second belt wheel is sleeved on the motor shaft assembly and can rotate relative to the motor shaft assembly, the first belt wheel and the second belt wheel are arranged at intervals, the first rotating shaft penetrates through the center of the third belt wheel and is fixed, the second rotating shaft penetrates through the center of the fourth belt wheel and is fixed, the transmission belt is wound on the first belt wheel, the fourth belt wheel, the second belt wheel and the third belt wheel, and the fourth belt wheel, the second belt wheel and the third belt wheel are driven to rotate by the first belt wheel.

In order to facilitate the relative rotation of the second belt wheel and the motor shaft assembly, but keep the relative fixation in the axial direction, the movement mechanism further comprises a bearing sleeved between the motor shaft assembly and the second belt wheel, the inner ring of the bearing is fixed with the motor shaft assembly, and the outer ring of the bearing is fixed with the second belt wheel.

Preferably, in order to ensure the matching of the transmission belt and the belt wheel, the axial direction of the first rotating shaft and the axial direction of the second rotating shaft are perpendicular to the axial direction of the motor shaft assembly.

In order to keep away from the main flue by the motor, the service life of the motor is prolonged, the fan system further comprises a shell, the first impeller, the second impeller, the first rotating shaft, the second rotating shaft, the third belt wheel and the fourth belt wheel are all located on the inner side of the shell, the motor, the first belt wheel and the second belt wheel are all located on the outer side of the shell, and a first avoiding hole which is formed in the shell and corresponds to the driving belt is formed in the shell.

Two belt pulleys are arranged at intervals conveniently, the motor shaft assembly comprises a coaxial motor shaft and an extension shaft, the motor shaft is connected with the motor main body, the motor shaft assembly further comprises a coupler for connecting the motor shaft and the extension shaft, the first belt pulley is arranged on the motor shaft, and the second belt pulley is arranged on the extension shaft.

In order to be able to guide the air flow after passing through the first impeller to the second impeller, the fan system further comprises a guide vane capable of guiding the air flow after passing through the first impeller to the second impeller, the guide vane being arranged between the first impeller and the second impeller.

Preferably, the guide vane comprises a casing and a blade, the casing is cylindrical, and the blade extends radially outwards at the periphery of the casing.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: a range hood, its characterized in that: a fan system as described above is applied.

In order to collect oil stains, the first impeller is arranged below the second impeller, and the range hood further comprises an oil collector which is arranged below the first impeller and used for collecting the oil stains.

Compared with the prior art, the utility model has the advantages of: by arranging the fan system into the first impeller and the second impeller which are coaxial and rotate in opposite directions and arranged in series, the combined impeller can enhance the separation efficiency of grease, obtain higher aerodynamic efficiency and reduce the abrasion of a motor shaft caused by the fact that a single impeller generates torque force with opposite angular speeds on the motor.

Drawings

Fig. 1 is a schematic view of a range hood according to an embodiment of the present invention;

fig. 2 is a sectional view of a range hood according to an embodiment of the present invention;

fig. 3 is an exploded view of a part of components of the range hood according to the embodiment of the present invention;

fig. 4 is a schematic connection diagram of the transmission belt of the range hood according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered limiting, as "upper", "lower", and the like are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 2, a range hood includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, and a fan system 3 is disposed in the fan frame 2. Air intake 11 has been seted up at the top of collection petticoat pipe 1, and fan system 3's input is towards the setting of corresponding air intake 11 downwards, and fan system 3's output is towards the top setting.

Referring to fig. 2-3, the fan system 3 includes a first impeller 32 and a second impeller 34. Preferably, the first impeller 32 is a centrifugal impeller and the second impeller 34 is an axial impeller. The second impeller 34 is located above the first impeller 32, and the first impeller 32 is located upstream of the second impeller 34 on the lampblack flow path. The fan system 3 further includes a first rotating shaft 31 for driving the first impeller 32 to rotate and a second rotating shaft 33 for driving the second impeller 34 to rotate, the first rotating shaft 31 is rotatably connected to the second rotating shaft 33 and is coaxially disposed, that is, the first impeller 32 and the second impeller 34 are coaxially arranged while being axially overlapped. The first rotating shaft 31 and the second rotating shaft 33 are arranged in opposite rotating directions, so that the torques of the first impeller 32 and the second impeller 34 are mutually counteracted, the impeller shaft is not influenced by torque force, and the phenomenon of obvious fatigue failure of the impeller is avoided. The vortex generated when the blades of the upper and lower coaxial counter-rotating groups of impellers rotate can be mutually offset, and the vortex loss of the fan system 3 is reduced to the minimum.

Referring to fig. 2 to 4, the range hood further includes a moving mechanism for driving the first impeller 32 and the second impeller 34 to rotate. The moving mechanism includes a motor 41, a first pulley 42, a second pulley 43, a third pulley 44, a fourth pulley 45, a transmission belt 46, and a bearing 47. The motor 41 includes a motor main body 411 and a motor shaft assembly 412 rotatably provided on the motor main body 411. The motor main body 411 is arranged on the inner side of the fan frame 2, and the first belt wheel 42 and the bearing 47 are sleeved on the motor shaft assembly 412 at intervals. The first pulley 42 is rotated by the motor shaft assembly 412, and the first pulley 42 is disposed between the motor main body 411 and the bearing 47. The inner ring of the bearing 47 is sleeved on and fixed to the motor shaft assembly 412, and the second pulley 43 is sleeved on and fixed to the outer ring of the bearing 47, so that the second pulley 43 can rotate relative to the motor shaft assembly 412. Alternatively, the bearing 47 may not be provided, so that the second pulley 43 is directly sleeved on the motor shaft assembly 412, and an axial limiting member is provided to prevent the second pulley 43 from axially moving. The first rotating shaft 31 is fixed at the center of the third pulley 44 and passes through the third pulley 44, and the first rotating shaft 31 is rotated by the third pulley 44. The second rotating shaft 33 is fixed at the center of the fourth pulley 45 and passes through the fourth pulley 45, and the second rotating shaft 33 is rotated by the fourth pulley 45. The transmission belt 46 is wound around the first belt wheel 42, the fourth belt wheel 45, the second belt wheel 43 and the third belt wheel 44, and the fourth belt wheel 45, the second belt wheel 43 and the third belt wheel 44 are driven by the first belt wheel 42 to rotate through the transmission belt 46. The first pulley 42 and the second pulley 43 constitute a driving pulley, the third pulley 44 and the fourth pulley 45 constitute a driven pulley, and the impeller rotation speed is increased by increasing the diameter ratio between the driving pulley and the driven pulley.

The motor shaft assembly 412 includes a motor shaft 4121 and an extended shaft 4122, and the motor shaft 4121 is connected with the motor body 411. The motor shaft assembly 412 also includes a coupling 4123 that couples the motor shaft 4121 and the extension shaft 4122. The first pulley 42 is provided on the motor shaft 4121, and the second pulley 43 is provided on the extension shaft 4122.

The axial directions of the first and second rotating

shafts

31 and 33 are arranged perpendicular to the axial direction of the motor shaft assembly 412. The first and

second shafts

31 and 33 extend longitudinally in the axial direction, and the motor shaft assembly 412 extends in the axial direction in the front-rear direction. The motor 41 is disposed at the right side of the blower frame 2, and the first pulley 42 and the second pulley 43 are located at the front side of the motor main body 411. The transmission belt 46 includes a first end and a second end, the first end of the transmission belt 46 is located at the top of the first pulley 42, and the second end of the transmission belt 46 passes through the rear portion of the fourth pulley 45, the left portion of the fourth pulley 45, the front portion of the fourth pulley 45, the top portion of the second pulley 43, the right portion of the second pulley 43, the bottom portion of the second pulley 43, the front portion of the third pulley 44, the left portion of the third pulley 44, the rear portion of the third pulley 44, the bottom portion of the first pulley 42, and the right portion of the first pulley 42 in sequence and is connected with the first end of the transmission belt 46 located at the top portion of the first pulley 42.

The fan system 3 further includes a housing 35, the first impeller 32, the second impeller 34, the first rotating shaft 31, the second rotating shaft 33, the third belt wheel 44 and the fourth belt wheel 45 are all located inside the housing 35, the motor 41, the first belt wheel 42 and the second belt wheel 43 are all located outside the housing 35, and a first avoiding hole 351 corresponding to the transmission belt 46 is formed in the housing 35. The motor 41 is arranged outside the shell 35, so that the motor can be far away from the main flue, and the service life of the motor 41 is prolonged.

The fan system 3 further comprises a guide vane 36 configured to guide the airflow after passing the first impeller 32 to the second impeller 34, the guide vane 36 being arranged between the first impeller 32 and the second impeller 34. The guide vane 36 includes a casing 361 disposed outside the first pulley 42 and the second pulley 43, and a blade 362, the casing 361 is cylindrical, the blade 362 radially extends to the inside of the housing 35 in the circumferential direction of the casing 361, and the casing 361 is provided with a second avoiding hole 3611 corresponding to the opening of the transmission belt 46.

Referring to fig. 2, the range hood further includes an oil collector 5 disposed below the first impeller 32 for collecting oil stains.

The range hood utilizes the motion mechanism to realize the high-speed reverse rotation of the upper axial flow impeller and the lower centrifugal impeller, so that a high negative pressure area is formed in the fan system 3. The sucked oil smoke is firstly thrown to the outer shell 35 under the action of centrifugal force through the first impeller 32, then passes through the guide vane 36 under the action of axial suction of the second impeller 34 to adjust the flow direction of an oil smoke outlet, and finally is discharged out of the range hood along the axial direction through the second impeller 34. The residence time of the sucked oil smoke in the range hood is reduced, the working time in the fan system 3 is prolonged, and most of the oil smoke flows to the oil collector 5 along the inner wall of the inner and outer shells 35. Compare in single centrifugal range hood's fan system, the utility model discloses a range hood passes through the separation efficiency of combination formula impeller reinforcing to the grease to and acquire higher pneumatic efficiency. The motor 41 of the moving mechanism transmits power to the first belt wheel 42, the first belt wheel 42 drives the second belt wheel 43, the third belt wheel 44 and the fourth belt wheel 45 to rotate through the transmission belt 46, and the second belt wheel 43 can rotate relative to the motor shaft assembly 412 as being sleeved on the bearing 47, so that the moving mechanism is not influenced by the torque of the motor shaft and only moves along with the transmission belt 46.

Claims

1. A fan system for a range hood, comprising a first impeller (32), characterized in that: the fan system (3) further comprises a second impeller (34), the first impeller (32) and the second impeller (34) are coaxially arranged and rotate in opposite directions, and the first impeller (32) is located at the upstream of the second impeller (34) on the oil smoke flow path.

2. The fan system for a range hood of claim 1, wherein: the first impeller (32) is a centrifugal impeller and the second impeller (34) is an axial flow impeller.

3. The fan system for a range hood according to claim 1 or 2, wherein: be provided with first pivot (31) of linkage on first impeller (32), be provided with second pivot (33) of linkage on second impeller (34), first pivot (31) and the coaxial setting of second pivot (33), fan system is still including being used for driving first pivot (31) and second pivot (33) along opposite direction pivoted motion.

4. The fan system for a range hood of claim 3, wherein: the moving mechanism comprises a motor (41), a first belt wheel (42), a second belt wheel (43), a third belt wheel (44), a fourth belt wheel (45) and a transmission belt (46), the motor (41) comprises a motor main body (411) and a motor shaft assembly (412) rotatably arranged on the motor main body (411), the first belt wheel (42) is sleeved on the motor shaft assembly (412) and is driven to rotate by the motor shaft assembly (412), the second belt wheel (43) is sleeved on the motor shaft assembly (412) and can rotate relative to the motor shaft assembly (412), the first belt wheel (42) and the second belt wheel (43) are arranged at intervals, the first rotating shaft (31) penetrates through the center of the third belt wheel (44) and is fixed, the second rotating shaft (33) penetrates through the center of the fourth belt wheel (45) and is fixed, and the transmission belt (46) is wound on the first belt wheel (42), the fourth belt wheel (45), the second belt wheel (43) and the third belt wheel (44), so that the fourth belt wheel (45), the second belt wheel (43) and the third belt wheel (42) are driven to rotate by the transmission belt (46).

5. The fan system for a range hood of claim 4, wherein: the movement mechanism further comprises a bearing (47) sleeved between the motor shaft assembly (412) and the second belt wheel (43), an inner ring of the bearing (47) is fixed with the motor shaft assembly (412), and an outer ring of the bearing (47) is fixed with the second belt wheel (43).

6. The fan system for a range hood according to claim 4, wherein: the axial directions of the first rotating shaft (31) and the second rotating shaft (33) are perpendicular to the axial direction of the motor shaft assembly (412).

7. The fan system for a range hood according to any one of claims 4 to 6, wherein: the fan system further comprises a shell (35), the first impeller (32), the second impeller (34), the first rotating shaft (31), the second rotating shaft (33), the third belt wheel (44) and the fourth belt wheel (45) are all located on the inner side of the shell (35), the motor (41), the first belt wheel (42) and the second belt wheel (43) are all located on the outer side of the shell (35), and a first avoiding hole (351) formed in the shell (35) and corresponding to the transmission belt (46) is formed in the shell.

8. The fan system for a range hood according to any one of claims 4 to 6, wherein: the motor shaft assembly (412) comprises a motor shaft (4121) and an extension shaft (4122) which are coaxial, the motor shaft (4121) is connected with the motor body (411), the motor shaft assembly (412) further comprises a coupling (4123) which is used for connecting the motor shaft (4121) and the extension shaft (4122), the first belt wheel (42) is arranged on the motor shaft (4121), and the second belt wheel (43) is arranged on the extension shaft (4122).

9. The fan system for a range hood according to claim 1 or 2, wherein: the fan system further includes a guide vane (36) configured to direct the airflow after passing through the first impeller (32) to the second impeller (34), the guide vane (36) disposed between the first impeller (32) and the second impeller (34).

10. The fan system for a range hood of claim 9, wherein: the guide vane (36) comprises a shell (361) and blades (362), the shell (361) is cylindrical, and the blades (362) extend outwards in the radial direction on the periphery of the shell (361).

11. A range hood, its characterized in that: use of a fan system according to any of claims 1-10.

12. The range hood of claim 11, wherein: the first impeller (32) is arranged below the second impeller (34), and the range hood further comprises an oil collector (5) which is arranged below the first impeller (32) and used for collecting oil stains.