Filter components, air ducts and range hoods

Abstract

The present invention provides a filter assembly, an air duct and a range hood, and relates to the technical field of kitchen appliances. The filter assembly includes a filter and a friction release mechanism; the filter is sleeved on the friction release mechanism; the friction release mechanism is used to be sleeved on the output shaft of the motor; when the output shaft speed of the motor is less than the preset speed of the filter, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter; when the output shaft speed of the motor is greater than the preset speed of the filter, the outer surface of the friction release mechanism and the inner surface of the filter slip. The friction release mechanism can maintain the preset speed of the filter after reaching the preset speed of the filter, and the speed of the motor can continue to increase, so that the motor and the filter can still keep rotating under different speeds, thereby reducing noise and wind resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a filter assembly, an air duct and a range hood. Background Art

[0002] At present, when the air duct of the range hood is working, the oil smoke is directly sucked into the air duct, and the oil stains are separated by the high-speed rotation of the impeller, and the smoke with some oil stains is discharged to the outside. After the impeller has been used for a period of time, a lot of oil stains will adhere to the impeller, which will affect the life of the impeller.

[0003] To solve the above problem, a rotating filter is installed at an air inlet of the air duct. The rotating filter rotates synchronously with the impeller to filter the oil and reduce the amount of oil adhering to the impeller.

[0004] However, the rotating filter screen rotates synchronously with the impeller, which easily causes problems of large wind resistance and high noise. Summary of the invention

[0005] The object of the present invention is to provide a filter assembly, an air duct and a range hood to solve the technical problems of large wind resistance and high noise of the rotating filter in the prior art.

[0006] The filter screen assembly provided by the present invention comprises a filter screen and a friction release mechanism;

[0007] The filter screen is sleeved on the friction release mechanism; the friction release mechanism is used to be sleeved on the output shaft of the motor;

[0008] When the output shaft speed of the motor is less than the preset speed of the filter, the outer surface of the friction release mechanism is in tight contact with the inner surface of the filter;

[0009] When the output shaft speed of the motor is greater than the preset speed of the filter, the outer surface of the friction release mechanism and the inner surface of the filter slip.

[0010] Further, the friction release mechanism includes a transmission shaft, a friction bushing and an elastic member;

[0011] A blind hole is provided on the outer surface of the transmission shaft, the elastic member is embedded in the blind hole, the friction bushing is sleeved on the transmission shaft, and the friction bushing compresses the elastic member;

[0012] The transmission shaft is used to be sleeved on the output shaft of the motor, and the filter screen of the filter screen is sleeved on the friction bearing sleeve.

[0013] Furthermore, the elastic member includes a spring and / or an electromagnetic spring.

[0014] Furthermore, there are a plurality of elastic members, and the plurality of elastic members are evenly spaced along the circumference of the transmission shaft.

[0015] Furthermore, the friction bearing sleeve includes at least two friction bearings, and at least two friction bearings are interlocked to form the friction bearing sleeve.

[0016] Furthermore, the filter assembly also includes a retaining ring;

[0017] The transmission shaft is provided with a boss, and the retaining ring is sleeved on the transmission shaft; along the axial direction of the transmission shaft, the boss and the retaining ring are respectively located on both sides of the filter screen, and the boss and the retaining ring cooperate to clamp the filter screen.

[0018] Another object of the present invention is to provide an air duct, comprising a motor and a filter assembly provided by the present invention.

[0019] Furthermore, the air duct also includes a volute assembly;

[0020] The motor is arranged inside the volute assembly, and the volute assembly has two air inlets, and the filter assembly is arranged at both of the two air inlets.

[0021] Furthermore, the air duct also includes at least one impeller assembly; at least one impeller assembly is arranged in the volute assembly, and at least one impeller assembly is sleeved on the output shaft of the motor.

[0022] Another object of the present invention is to provide a range hood, comprising the filter assembly provided by the present invention or the air duct provided by the present invention.

[0023] The filter assembly provided by the present invention comprises a filter and a friction release mechanism; the filter is sleeved on the friction release mechanism; the friction release mechanism is used to be sleeved on the output shaft of the motor; when the output shaft speed of the motor is less than the preset speed of the filter, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter; when the output shaft speed of the motor is greater than the preset speed of the filter, the outer surface of the friction release mechanism is slipped with the inner surface of the filter. When the output shaft speed of the motor is less than the preset speed of the filter, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter, and the torque of the friction release mechanism is transmitted to the filter through friction, so that the filter rotates at the same speed as the output shaft of the motor; when the output shaft speed of the motor is greater than the preset speed of the filter, the friction between the outer surface of the friction release mechanism and the inner surface of the filter is balanced with the torque of the filter, and the outer surface of the friction release mechanism is slipped with the inner surface of the filter, so that the filter maintains the preset speed of the filter, but the motor can drive the impeller assembly to maintain a higher speed to achieve the designed air volume and pressure. The friction release mechanism can make the filter maintain the preset filter speed after reaching the preset filter speed, and the motor speed can continue to increase, so that the motor and the filter can still keep rotating at different speeds, thereby reducing noise and wind resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a cross-sectional view of an air duct provided by an embodiment of the present invention;

[0026] Figure 2 is an exploded view of an air duct provided by an embodiment of the present invention;

[0027] Figure 3 is an exploded view of a filter assembly with a spring in an air duct provided by an embodiment of the present invention;

[0028] Figure 4 is a cross-sectional view of a filter assembly with a spring in an air duct provided by an embodiment of the present invention;

[0029] Figure 5 is an exploded view of a filter assembly with an electromagnetic spring in an air duct provided by an embodiment of the present invention;

[0030] Figure 6 It is a cross-sectional view of a filter assembly with an electromagnetic spring in an air duct provided by an embodiment of the present invention.

[0031] Icons: 1-tightening nut; 2-air inlet ring; 3-filter assembly; 4-impeller assembly; 5-motor; 6-volute assembly; 7-check valve assembly; 31-retaining ring; 32-filter; 33-friction bearing; 34-spring; 35-drive shaft; 36-electromagnetic spring. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a filter assembly 3, an air duct and a range hood. A plurality of embodiments are given below to describe in detail the filter assembly 3, the air duct and the range hood provided by the present invention.

[0034] Example 1

[0035] The filter assembly 3 provided in this embodiment is as follows Figures 1 to 6 As shown, it includes a filter 32 and a friction release mechanism; the filter 32 is sleeved on the friction release mechanism; the friction release mechanism is used to be sleeved on the output shaft of the motor; when the output shaft speed of the motor is less than the preset speed of the filter 32, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter 32; when the output shaft speed of the motor is greater than the preset speed of the filter 32, the outer surface of the friction release mechanism and the inner surface of the filter 32 slip.

[0036] When the output shaft speed of the motor is less than the preset speed of the filter 32, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter 32, and the torque of the friction release mechanism is transmitted to the filter 32 through friction, so that the filter 32 rotates at the same speed as the output shaft of the motor; when the output shaft speed of the motor is greater than the preset speed of the filter 32, the friction between the outer surface of the friction release mechanism and the inner surface of the filter 32 is balanced with the torque of the filter 32, and the outer surface of the friction release mechanism and the inner surface of the filter 32 slip, so that the filter 32 maintains the preset speed of the filter 32, but the motor 5 can drive the impeller assembly 4 to maintain a higher speed to achieve the designed air volume and pressure. The friction release mechanism can make the filter 32 maintain the preset speed of the filter 32 after reaching the preset speed of the filter 32, and the speed of the motor 5 can continue to increase, so that the motor 5 and the filter 32 can still keep rotating under different speeds, thereby reducing noise and wind resistance.

[0037] Furthermore, the friction release mechanism includes a transmission shaft 35, a friction bearing sleeve and an elastic member; a blind hole is provided on the outer surface of the transmission shaft 35, the elastic member is embedded in the blind hole, the friction bearing sleeve is sleeved on the transmission shaft 35, and the friction bearing sleeve compresses the elastic member; the transmission shaft 35 is used to be sleeved on the output shaft of the motor, and the filter screen 32 is sleeved on the friction bearing sleeve.

[0038] The output shaft of the motor is connected to the transmission shaft 35. The rotation of the output shaft of the motor can drive the transmission shaft 35 to rotate around the axis of the output shaft of the motor. When the output shaft speed of the motor is lower than the preset speed of the filter 32, the transmission shaft 35 transmits the rotational torque to the friction bearing sleeve. The outer surface of the friction bearing sleeve is pressed into contact with the inner surface of the filter 32 due to the pressure of the elastic part, and the torque of the friction bearing sleeve is transmitted to the filter 32 through friction force, so that the filter 32 rotates at the same speed as the output shaft of the motor.

[0039] When the output shaft speed of the motor is greater than the preset speed of the filter 32, the transmission shaft 35 transmits the rotational torque to the friction bearing sleeve. The friction force between the outer surface of the friction bearing sleeve and the inner surface of the filter 32 is balanced with the torque of the filter 32. The outer surface of the friction bearing sleeve and the inner surface of the filter 32 slip, so that the filter 32 maintains the preset speed of the filter 32. However, the motor 5 can drive the impeller assembly 4 to maintain a higher speed to achieve the designed air volume and pressure.

[0040] Further, the elastic member includes a spring 34 and / or an electromagnetic spring 36 .

[0041] Specifically, the elastic member may include a spring 34 , may include an electromagnetic spring 36 , or may include a spring 34 and an electromagnetic spring 36 .

[0042] The elastic force of the electromagnetic spring 36 can be adjusted according to the feedback of the size of the external oil smoke. When the amount of oil smoke is large, the elastic force of the electromagnetic spring 36 increases, the pressing force between the electromagnetic spring 36 and the inner surface of the filter 32 increases, and the friction between the outer surface of the friction bearing sleeve and the inner surface of the filter 32 increases, so that the preset speed of the filter 32 is adjusted to a relatively high value; when the amount of oil smoke is small, the elastic force of the electromagnetic spring 36 decreases, the pressing force between the electromagnetic spring 36 and the inner surface of the filter 32 decreases, and the friction between the outer surface of the friction bearing sleeve and the inner surface of the filter 32 decreases, so that the preset speed of the filter 32 is adjusted to a relatively small value.

[0043] By detecting the amount of external oil smoke and feeding it back to the electromagnetic spring 36, the size of the elastic force of the electromagnetic spring 36 is controlled, so that the preset speed of the filter 32 has an automatic adjustment range of the speed, ensuring that under different oil smoke amounts, the filter 32 can have a suitable speed, with good oil smoke filtering effect, reduced wind resistance, and no increase in noise.

[0044] Furthermore, there are multiple elastic members, and the multiple elastic members are evenly spaced along the circumference of the transmission shaft 35, so that the pressing force of the elastic members on the inner surface of the filter screen 32 is more evenly distributed.

[0045] For example, the elastic member includes four springs 34 , and the four springs 34 are evenly spaced apart along the circumference of the transmission shaft 35 .

[0046] For example, the elastic member includes four springs 34 and two electromagnetic springs 36. The four springs 34 are evenly spaced along the circumference of the transmission shaft 35. The two electromagnetic springs 36 are evenly spaced, and each electromagnetic spring 36 is respectively arranged between two springs 34. Along the circumference of the transmission shaft 35, the spacing between each electromagnetic spring 36 and two adjacent springs 34 is the same.

[0047] Furthermore, the friction bearing sleeve includes at least two friction bearings 33, and the at least two friction bearings 33 are interlocked to form the friction bearing sleeve.

[0048] The number of the friction bearings 33 may be two, three, four or any other suitable number.

[0049] For example, two friction bearings 33 are interlocked to form a friction bearing sleeve, so that the friction bearing sleeve has a two-half structure, which can facilitate the installation of the friction bearing sleeve.

[0050] At least two friction bearings 33 may be fixed to each other by being snap-fitted, or may be fixed by fasteners.

[0051] Furthermore, the filter assembly 3 also includes a retaining ring 31; a boss is provided on the transmission shaft 35, and the retaining ring 31 is sleeved on the transmission shaft 35; along the axial direction of the transmission shaft 35, the boss and the retaining ring 31 are respectively located on both sides of the filter 32, and the boss and the retaining ring 31 cooperate to clamp the filter 32.

[0052] The retaining ring 31 is sleeved on the transmission shaft 35, and the retaining ring 31 is clamped with the transmission shaft 35. The filter screen 32 is fixed on the transmission shaft 35 by the retaining ring 31 and the boss. The assembly is relatively convenient, so that multiple parts form the filter screen assembly 3.

[0053] In the filter assembly 3 provided in this embodiment, when the output shaft speed of the motor is less than the preset speed of the filter 32, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter 32, and the torque of the friction release mechanism is transmitted to the filter 32 through friction, so that the filter 32 rotates at the same speed as the output shaft of the motor; when the output shaft speed of the motor is greater than the preset speed of the filter 32, the friction between the outer surface of the friction release mechanism and the inner surface of the filter 32 is balanced with the torque of the filter 32, and the outer surface of the friction release mechanism and the inner surface of the filter 32 slip, so that the filter 32 maintains the preset speed of the filter 32, but the motor 5 can drive the impeller assembly 4 to maintain a higher speed to achieve the designed air volume and pressure. The friction release mechanism can make the filter 32 maintain the preset speed of the filter 32 after reaching the preset speed of the filter 32, and the speed of the motor 5 can continue to increase, so that the motor 5 and the filter 32 can still keep rotating under different speeds, thereby reducing noise and wind resistance.

[0054] Example 2

[0055] The air duct provided in this embodiment includes a motor 5 and the filter assembly 3 provided in Embodiment 1.

[0056] When the output shaft speed of the motor is less than the preset speed of the filter 32, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter 32, and the torque of the friction release mechanism is transmitted to the filter 32 through friction, so that the filter 32 rotates at the same speed as the output shaft of the motor; when the output shaft speed of the motor is greater than the preset speed of the filter 32, the friction between the outer surface of the friction release mechanism and the inner surface of the filter 32 is balanced with the torque of the filter 32, and the outer surface of the friction release mechanism and the inner surface of the filter 32 slip, so that the filter 32 maintains the preset speed of the filter 32, but the motor 5 can drive the impeller assembly 4 to maintain a higher speed to achieve the designed air volume and pressure. The friction release mechanism can make the filter 32 maintain the preset speed of the filter 32 after reaching the preset speed of the filter 32, and the speed of the motor 5 can continue to increase, so that the motor 5 and the filter 32 can still keep rotating under different speeds, thereby reducing noise and wind resistance.

[0057] Furthermore, the air duct also includes a volute assembly 6; the motor 5 is arranged inside the volute assembly 6, and the volute assembly 6 has two air inlets, and the filter assembly 3 is arranged at the two air inlets.

[0058] The filter assembly 3 is arranged at both air inlets, which can keep the impeller assembly 4 clean, increase the service life of the impeller assembly 4, improve the oil separation degree, and reduce pollutant emissions.

[0059] The motor 5 is arranged inside the volute assembly 6, so that the motor 5 can avoid the air inlet position, so that the filter assemblies 3 can be set at the two air inlets, and one motor 5 can be used to drive the two filter assemblies 3 to work, with a simple structure and low energy consumption.

[0060] The motor 5 can be installed in the volute assembly 6 through a plate body or a frame body.

[0061] For example, a plate body is provided inside the volute assembly 6, and the motor 5 is fixed on the plate body. Specifically, the plate body is fixedly connected to the inside of the volute assembly 6, and the motor 5 can be clamped on the plate body, or fixed on the plate body by a fastener.

[0062] Among them, along the axial direction of the air inlet, the motor 5 can be installed at the middle position inside the volute assembly 6, and can also be installed at a non-middle position.

[0063] Furthermore, the air duct also includes at least one impeller assembly 4; at least one impeller assembly 4 is disposed in the volute assembly 6, and at least one impeller assembly 4 is sleeved on the output shaft of the motor.

[0064] The number of the impeller assembly 4 may be one or two, or any other suitable number.

[0065] For example, the impeller assembly 4 is one, and the impeller assembly 4 is connected to the output shaft of the motor 5 so that the motor 5 drives the impeller assembly 4 to rotate, that is, the rotation speed of the impeller assembly 4 is always equal to the rotation speed of the motor. A filter screen 32 is arranged on the output shaft of the motor, and the filter screen 32 is connected to the output shaft of the motor through a friction release mechanism, so that the rotation speed of the filter screen 32 is equal to the rotation speed of the motor at the beginning. After the filter screen 32 reaches a certain rotation speed, it may not be equal to the rotation speed of the motor. In this way, the speeds of the impeller assembly 4 and the filter screen 32 may be different, and at the same time, it will not affect the rotation of the impeller assembly 4.

[0066] In another embodiment, there are two impeller assemblies 4, and output shafts are respectively provided on both sides of the motor 5, and an impeller assembly 4 is respectively sleeved on the output shaft of each motor; and a filter screen 32 is respectively provided on the output shaft of each motor, and the filter screen 32 is connected to the output shaft of the motor through a friction release mechanism. Providing two impeller assemblies 4 can make the aerodynamic performance of the air duct better, and using one motor 5 to drive two impeller assemblies 4 and two filter screens 32 to work, the structure is simple and the energy consumption is low.

[0067] When the rotation speed of the filter 32 is less than the preset rotation speed of the filter 32, the filter 32 rotates at the same speed as the impeller assembly 4; after the rotation speed of the filter 32 reaches the preset rotation speed of the filter 32, as the rotation speed of the motor 5 continues to increase, the friction release mechanism can keep the filter 32 at the preset rotation speed, and the motor 5 can drive the impeller assembly 4 to maintain a higher rotation speed to achieve the designed air volume and pressure, so that the impeller assembly 4 and the filter 32 maintain different rotation speeds respectively, so that the impeller assembly 4 and the filter 32 can respectively maintain a better working state, thereby reducing noise and wind resistance.

[0068] Specifically, the air duct also includes a hand-tightening nut 1, an air inlet ring 2 and a check valve assembly 7. The motor 5 is mounted on a plate body inside the volute assembly 6, two impeller assemblies 4 are sleeved on the output shafts on both sides of the motor 5, and two filter assemblies 3 are also sleeved on the output shafts on both sides of the motor 5, and the transmission shaft teeth of the filter assembly 3 are engaged with the shaft teeth on the impeller assembly 4 for transmission. The hand-tightening nut 1 is screwed onto the end of the output shaft of the motor to press the filter assembly 3 and the impeller assembly 4 onto the output shaft of the motor. When the output shaft of the motor rotates, the filter assembly 3 and the impeller assembly 4 on both sides of the motor 5 are driven to rotate. The air inlet ring 2 is mounted at the air inlets on both sides of the volute assembly 6, and the check valve assembly 7 is mounted at the air outlet of the volute assembly 6.

[0069] Example 3

[0070] The range hood provided in this embodiment includes the filter assembly 3 provided in embodiment 1 or the air duct provided in embodiment 2.

[0071] When the output shaft speed of the motor is less than the preset speed of the filter 32, the outer surface of the friction release mechanism is pressed and contacted with the inner surface of the filter 32, and the torque of the friction release mechanism is transmitted to the filter 32 through friction, so that the filter 32 rotates at the same speed as the output shaft of the motor; when the output shaft speed of the motor is greater than the preset speed of the filter 32, the friction between the outer surface of the friction release mechanism and the inner surface of the filter 32 is balanced with the torque of the filter 32, and the outer surface of the friction release mechanism and the inner surface of the filter 32 slip, so that the filter 32 maintains the preset speed of the filter 32, but the motor 5 can drive the impeller assembly 4 to maintain a higher speed to achieve the designed air volume and pressure. The friction release mechanism can make the filter 32 maintain the preset speed of the filter 32 after reaching the preset speed of the filter 32, and the speed of the motor 5 can continue to increase, so that the motor 5 and the filter 32 can still keep rotating under different speeds, thereby reducing noise and wind resistance.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter assembly (3), It is characterized in that It includes a filter screen (32) and a friction release mechanism; The filter screen (32) is sleeved on the friction release mechanism; the friction release mechanism is used to be sleeved on the output shaft of the motor; When the output shaft speed of the motor is less than the preset speed of the filter (32), the outer surface of the friction release mechanism is pressed into contact with the inner surface of the filter (32), so that the filter (32) rotates at the same speed as the output shaft of the motor; When the output shaft speed of the motor is greater than the preset speed of the filter (32), the outer surface of the friction release mechanism and the inner surface of the filter (32) slip, so that the filter (32) maintains the preset speed of the filter (32).

2. The filter assembly (3) according to claim 1, It is characterized in that The friction release mechanism comprises a transmission shaft (35), a friction bushing and an elastic member; A blind hole is provided on the outer surface of the transmission shaft (35), the elastic member is embedded in the blind hole, the friction bushing is sleeved on the transmission shaft (35), and the friction bushing compresses the elastic member; The transmission shaft (35) is used to be sleeved on the output shaft of the motor, and the filter screen (32) is sleeved on the friction bushing.

3. The filter assembly (3) according to claim 2, It is characterized in that The elastic member includes a spring (34) and / or an electromagnetic spring (36).

4. The filter assembly (3) according to claim 2 or 3, It is characterized in that There are a plurality of elastic members, and the plurality of elastic members are evenly spaced along the circumference of the transmission shaft (35).

5. The filter assembly (3) according to claim 2 or 3, It is characterized in that The friction bearing bush sleeve comprises at least two friction bearing bushes (33), and at least two friction bearing bushes (33) are interlocked to form the friction bearing bush sleeve.

6. The filter assembly (3) according to claim 2 or 3, It is characterized in that The filter screen assembly (3) further comprises a retaining ring (31); The transmission shaft (35) has a boss, and the retaining ring (31) is sleeved on the transmission shaft (35); along the axial direction of the transmission shaft (35), the boss and the retaining ring (31) are respectively located on both sides of the filter screen (32), and the boss and the retaining ring (31) cooperate to clamp the filter screen (32).

7. An air duct, It is characterized in that It comprises a motor (5) and a filter assembly (3) according to any one of claims 1 to 6.

8. The air duct according to claim 7, It is characterized in that The air duct also includes a volute assembly (6); The motor (5) is arranged inside the volute assembly (6), and the volute assembly (6) has two air inlets, and the filter assembly (3) is arranged at both of the air inlets.

9. The air duct according to claim 8, It is characterized in that The air duct further comprises at least one impeller assembly (4); at least one impeller assembly (4) is arranged in the volute assembly (6), and at least one impeller assembly (4) is sleeved on the output shaft of the motor.

10. A range hood, It is characterized in that It comprises the filter assembly (3) according to any one of claims 1 to 6 or the air duct according to any one of claims 7 to 9.

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