An air purifier

Abstract

The utility model relates to the technical field of household appliances, and specifically to an air purifier, comprising a housing and a fan assembly arranged in the housing for accelerating air flow, the fan assembly comprising a motor and a wind wheel, the motor comprising a fixed part and a rotating part connected in relative rotation, the fixed part being fixedly arranged relative to the housing, and the rotating part being connected to the wind wheel to drive the wind wheel to rotate; the rotating part comprising a motor housing and a motor shaft connected in relative fixed connection, the motor housing being arranged outside the motor shaft, and the motor housing being fixedly connected to the wind wheel, so that the rotation of the motor housing drives the rotation of the wind wheel. The utility model fixedly connects the motor housing and the motor shaft, and fixedly connects the motor housing and the wind wheel, and uses a motor housing with a larger outer diameter to drive the wind wheel to rotate. The motor housing can better maintain its own stability relative to the motor shaft under the action of the wind wheel's gravity and the rotational tangential force, thereby reducing the vibration of the motor, improving the stability of the wind wheel's rotation, and further reducing the vibration of the air purifier.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an air purifier. Background Art

[0002] In air purifiers, a wind wheel is often used to make the air flow between the air inlet and the air outlet, so that the air at the air inlet is sucked into the air purifier for purification and filtration, and then blown out from the air outlet. The rotation of the wind wheel is controlled by a motor. The motor shaft is connected to the wind wheel through gaskets, retaining rings, fixing nuts and other parts. Due to the large number of parts between the motor shaft and the wind wheel, the errors between adjacent parts accumulate step by step, resulting in a large installation error between the motor shaft and the wind wheel; and because there are many parts installed on the motor shaft, the motor shaft is designed to be longer. When the wind wheel rotates at high speed, the gravity of the wind wheel and the centrifugal force of the rotation will cause vibration. The longer motor shaft increases the amplitude of the vibration, causing inconvenience in use.

[0003] Invention patent application CN202010073176.5 proposes an air outlet device and an air purifier, which sets a shock-absorbing mechanism outside the motor to reduce the vibration of the air purifier. However, this method has limited effect on vibration improvement, and the connection structure between the motor shaft and the wind wheel is still relatively complicated, which is not conducive to the assembly of the air purifier. Summary of the invention

[0004] The purpose of the utility model is to overcome the defect of large vibration in the operation of the air purifier in the prior art by optimizing the connection structure between the wind wheel and the motor, thereby reducing the vibration of the wind wheel in the air purifier.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: an air purifier, comprising a shell and a fan assembly arranged in the shell for accelerating air flow, the fan assembly comprising a motor and a wind wheel, the motor comprising a fixed part and a rotating part connected relatively to rotation, the fixed part is fixedly arranged relative to the shell, and the rotating part is connected to the wind wheel to drive the wind wheel to rotate; the rotating part comprises a motor casing and a motor shaft that are relatively fixedly connected, the motor casing is arranged outside the motor shaft, and the motor casing is fixedly connected to the wind wheel, so that the rotation of the motor casing drives the wind wheel to rotate.

[0006] In one embodiment, a mounting groove is provided at the center of the wind wheel, the motor housing is fixedly installed in the mounting groove, and the outer side wall of the motor housing abuts against the side wall of the mounting groove.

[0007] In one embodiment, the motor housing and the wind wheel are connected by injection molding.

[0008] In one embodiment, the motor housing is provided with a clearance hole, and the wind wheel is provided with a main body portion located on the outside of the motor housing, a pressing portion located on the inside of the motor housing, and a connecting portion located in the clearance hole, and the connecting portion connects the pressing portion and the main body portion as a whole, so that the main body portion, the pressing portion and the connecting portion cooperate to form a limiting structure of the motor housing.

[0009] In one embodiment, the motor housing is riveted to the end of the motor shaft.

[0010] In one embodiment, the motor housing is provided with a through hole, the motor shaft is passed through the through hole and the end thereof is fixedly embedded in the wind wheel.

[0011] In one embodiment, the fixed portion includes a connection component sleeved outside the motor shaft, and the connection component is relatively fixedly connected to the housing through a plurality of first connection points, and the first connection points are arranged at intervals around the motor shaft.

[0012] In one embodiment, the connecting assembly includes a connecting disk and a connecting sleeve, the first connecting point is located on the connecting disk so that the connecting assembly and the shell are relatively fixedly connected through the connecting disk, the connecting sleeve and the connecting disk are connected through multiple second connecting points, and the second connection points are arranged at intervals around the motor shaft, the connecting sleeve is connected to the motor shaft through a bearing, so that the connecting sleeve and the motor shaft form a relative rotational connection, thereby realizing the relative rotational connection between the fixed part and the rotating part of the motor.

[0013] In one embodiment, the connection plate and the connection sleeve are respectively made of metal.

[0014] In one embodiment, it also includes a duct assembly and a filter assembly, the shell is provided with an air inlet and an air outlet, the filter assembly, the fan assembly, and the duct assembly are arranged in sequence from the air inlet to the air outlet, the filter assembly is used to purify the air, and the duct assembly is used to guide the airflow from the fan assembly.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model fixedly connects the motor housing and the motor shaft, and fixedly connects the motor housing and the wind wheel, and uses the motor housing with a larger outer diameter to drive the wind wheel to rotate. The motor housing can better maintain its own stability relative to the motor shaft under the action of the wind wheel's gravity and rotational tangential force, thereby reducing the vibration of the motor, improving the stability of the wind wheel's rotation, and further reducing the vibration of the air purifier.

[0017] 2. The motor shaft is riveted to the motor housing, and then the motor housing and the wind wheel are fixedly connected by injection molding. The motor shaft is embedded in the wind wheel to further strengthen the connection between the motor and the wind wheel, and greatly reduce the installation error between the motor housing and the wind wheel, further reducing the vibration of the wind wheel and the motor.

[0018] 3. The motor housing and the wind wheel are directly connected, and there are no other parts that will increase the installation error, further reducing the vibration of the wind wheel and the motor.

[0019] 4. The first connection point of the connecting component and the second connection point between the connecting plate and the connecting sleeve respectively form a multi-point connection around the motor shaft, which not only makes the motor installation more stable, but also makes the connection between the various parts in the motor more reliable, reduces the internal vibration of the motor and the vibration between the motor and the housing, and reduces the operating noise.

[0020] 5. The connecting plate and connecting sleeve made of metal materials are stronger and can withstand the tangential force caused by the high-speed rotation of the wind wheel, thereby increasing the service life of the fan assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a stereogram of an embodiment of the utility model.

[0022] Figure 2 It is a cross-sectional view of an embodiment of the utility model.

[0023] Figure 3 It is an exploded view of the fan assembly of the embodiment of the utility model.

[0024] Figure 4 It is a cross-sectional view of the fan assembly of the embodiment of the utility model.

[0025] Figure 5 It is a structural diagram of the motor housing of an embodiment of the utility model.

[0026] Figure 6 It is a cross-sectional view of the wind wheel of the utility model embodiment.

[0027] Figure 7 It is a structural diagram of a connecting sleeve according to an embodiment of the utility model.

[0028] Figure 8 It is a structural diagram of a partition according to an embodiment of the utility model.

[0029] Wherein: 1 shell, 11 air inlet, 12 air outlet, 2 filter assembly, 3 fan assembly, 31 motor, 31A fixed part, 31B rotating part, 311 motor shell, 3111 clearance hole, 312 motor shaft, 313 connecting plate, 3131 first connecting hole, 3132 second connecting hole, 314 connecting sleeve, 3141 first connecting part, 3142 second connecting part, 315 bearing, 316 control circuit board, 317 coil, 32 wind wheel, 21 mounting slot, 4 air duct assembly, 401 air duct, 41 guide piece, 411 guide plate, 42 connecting piece, 43 cover, 5 partition, 50 ventilation part, 51 ventilation hole, 6 air outlet plate, 7 control panel. DETAILED DESCRIPTION

[0030] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0031] See also Figure 1 and Figure 2 As shown, the utility model discloses an air purifier, including a shell 1, the shell 1 is provided with an air inlet 11 and an air outlet 12, and also includes a filter assembly 2, a fan assembly 3 and an air duct assembly 4 arranged in the shell 1, the filter assembly 2, the fan assembly 3, and the air duct assembly 4 are arranged in sequence along the air flow direction from the air inlet 11 to the air outlet 12, the filter assembly 2 is used for purifying air, the fan assembly 3 is used for accelerating air flow to form an airflow from the air inlet 11 to the air outlet 12, and the air duct assembly 4 is used for guiding the airflow from the fan assembly 3 so that the airflow can flow out smoothly from the air outlet 12.

[0032] See also Figures 2 to 7 As shown, the fan assembly 3 includes a motor 31 and a wind wheel 32. The motor 31 includes a fixed part 31A and a rotating part 31B that are relatively rotatably connected. The fixed part 31A is fixedly arranged relative to the housing 1, and the rotating part 31B is connected to the wind wheel 32 to drive the wind wheel 32 to rotate. The rotating wind wheel 32 inhales the air below it from the air inlet at the center and then discharges it from the air outlet on the side, thereby forming an airflow from the air inlet 11 to the air outlet 12. The rotating part 31B includes a motor housing 311 and a motor shaft 312 that are relatively fixedly connected. The motor housing 311 is arranged outside the motor shaft 312, and the motor housing 311 is fixedly connected to the wind wheel 32, so that the rotation of the motor housing 311 drives the wind wheel 32 to rotate.

[0033] The wind wheel 32 is connected to the motor housing 311, and the rotation of the motor housing 311 drives the wind wheel 32 to rotate. The motor shaft 312 directly drives the wind wheel 32 to rotate, and the motor housing 311 drives the wind wheel 32, instead of the traditional motor shaft 312 directly driving the wind wheel 32 to rotate. The motor housing 311 is larger in size, and can better maintain its own stability under the tangential force of the high-speed rotation of the wind wheel 32 and the gravity of the wind wheel itself, thereby reducing the vibration caused by the high-speed rotation of the wind wheel.

[0034] A mounting groove 321 is provided at the center of the wind wheel 32, and the motor housing 311 is fixedly installed in the mounting groove 321. The mounting groove 321 is provided in the wind wheel 32, the motor housing 311 is arranged in the mounting groove 321, and the outer wall of the motor housing 311 is abutted against the side wall of the mounting groove 321, so that the positioning of the motor housing 311 is achieved through the groove wall of the mounting groove 321. In addition, the side wall of the mounting groove 321 and the outer wall of the motor housing 311 have a large area, so that there is a large contact area between the motor housing 311 and the wind wheel 32 to achieve force transmission, the power transmission between the two is more stable, and the power transmitted to the wind wheel 32 is more balanced, which is conducive to the smooth rotation of the wind wheel 32.

[0035] The motor housing 311 and the wind wheel 32 are connected by injection molding, and the wind wheel 32 is wrapped around the outside of the motor housing 311, so that the connection between the motor housing 311 and the wind wheel 32 is more secure, and the injection molding connection makes the installation error between the motor housing 311 and the wind wheel 32 extremely small. Since the outer surface of the side wall of the motor housing is relatively smooth and has no protrusions or other structures embedded in the wind wheel for fixing, the motor housing 311 may be removed from the installation groove 321 of the wind wheel 32 in the axial direction of the motor housing. Therefore, the wind wheel 32 is provided with a limiting structure to prevent the motor housing 311 from escaping from the mounting groove 321, specifically: the motor housing 311 is provided with a clearance hole 3111, the wind wheel 32 is provided with a main body 322 located on the outside of the motor housing 311, a pressing part 323 located on the inside of the motor housing 311, and a connecting part 324 located in the clearance hole 3111, and the connecting part 324 connects the pressing part 323 and the main body 322 as a whole, so that the main body 322, the pressing part 323 and the connecting part 324 cooperate to form a limiting structure of the motor housing 311. The injection-molded connecting part 324 is filled in the clearance hole 3111 to increase the outer diameter and strength of the connecting part 324. The clearance hole 3111 in this example is set at the bottom of the motor housing 311, so the pressing part 323 and the main body 322 cooperate to limit the axial displacement of the motor housing 311. In other embodiments, the clearance hole 3111 may also be provided on the side wall of the motor housing 311 , and in this case, the connecting portion 324 serves to limit the axial displacement of the motor housing 311 .

[0036] In this example, the motor housing 311 and the wind wheel 32 are connected by injection molding. In other embodiments, the motor housing 311 and the wind wheel 32 can also be fixed by bonding. The bonding operation is convenient and quick, which is conducive to improving assembly efficiency.

[0037] The motor housing 311 and the end of the motor shaft 312 are riveted, more specifically: the motor housing 311 is provided with a through hole, the motor shaft 312 is passed through the through hole and its end is fixedly embedded in the wind wheel 32. During installation, the motor shaft 312 and the motor housing 311 are first riveted and fixed, and then the riveted motor housing 311 and the motor shaft 312 are placed in an injection mold as a whole with the wind wheel 32 for injection molding; or the riveted motor housing 311 and the motor shaft 312 are placed in a mounting groove 321 of the injection-molded wind wheel 32 as a whole for adhesive fixing.

[0038] The utility model realizes the indirect connection between the motor shaft 312 and the wind wheel 32 through the motor housing 311, that is, only the motor housing 311 is provided between the motor shaft 312 and the wind wheel 32, and there are fewer parts between the motor shaft 312 and the wind wheel 32, so the installation error between the two is small. In addition, the motor housing 311 and the wind wheel 32 are injection-molded, and the error between the motor housing 311 and the wind wheel 32 is extremely small, which further reduces the assembly error between the motor shaft 312 and the wind wheel 32, making the relative movement between the two extremely small, reducing the vibration of the motor shaft 312, and further reducing the vibration and noise during the operation of the air purification.

[0039] The wind wheel 32 in the prior art is connected to the motor shaft 312, and the motor 31 is fixedly connected to the air duct assembly 4, so the dynamic balance test of the wind wheel 32 is usually performed on the wind wheel 32 alone. Combining the above analysis, it can be seen that the relative vibration between the existing motor shaft 312 and the wind wheel 32 is relatively large, so the dynamic balance of the wind wheel 32 and the motor 31 during actual operation after installation will be different from the test. The utility model fixes the motor housing 311 and the motor shaft 312 of the motor 31 to the wind wheel, and then connects the motor 31 to the air duct assembly through a connecting assembly. Therefore, in the dynamic balance test of the wind wheel 32, the motor 31 and the wind wheel 32 can be tested together, which is more in line with the state of the wind wheel 32 in actual operation, and the test results are more accurate, which is conducive to changing the structure of the air purifier according to the test results during the design and manufacturing stage.

[0040] See also Figures 3 to 7As shown, the fixed part 31A includes a connecting component sleeved outside the motor shaft 312, and the connecting component is relatively fixedly connected to the housing 1 through a plurality of first connecting points, and the first connecting points are arranged at intervals around the motor shaft 312. The connecting component includes a connecting disk 313 and a connecting sleeve 314, and the first connecting point is located at the connecting disk 313 so that the connecting component is relatively fixedly connected to the housing 1 through the connecting disk 313, and the connecting sleeve 314 and the connecting disk 313 are connected through a plurality of second connecting points, and the second connecting points are arranged at intervals around the motor shaft 312, and the connecting sleeve 314 is connected to the motor shaft 312 through a bearing 315, so that the connecting sleeve 314 and the motor shaft 312 form a relative rotation connection, thereby realizing the relative rotation connection between the fixed part 31A and the rotating part 31B of the motor 31.

[0041] The connection plate 313 is provided with three first connection holes 3131, and a plurality of connection members 42 are fixedly provided on the air guide member 41 of the air duct assembly 4. The connection plate 313 is fixedly connected to the air guide member 41 by bolts passing through the first connection holes 3131 and the connection members 42, thereby indirectly forming a relatively fixed connection between the fixed portion 31A of the motor 31 and the housing 1. The connection between each first connection hole 3131 and the connection member 42 forms a first connection point, which is three in this example, and is evenly arranged around the motor shaft 312 on the outside of the motor shaft 312.

[0042] The connecting sleeve 314 is a sleeve structure as a whole, and its interior is hollow for passing the motor shaft 312, and steps are respectively provided at the upper and lower ends for installing the bearing 315. The motor shaft 312 is connected to the connecting sleeve 314 through the bearing 315, so as to form a relative rotation connection between the motor shaft 312 and the connecting sleeve 314. The connecting sleeve 314 is provided with three radially extending first connecting parts 3141, and the connecting disk 313 is provided with three second connecting holes 3132 corresponding to the first connecting parts 3141. The connecting sleeve 314 is fixedly connected to the connecting disk 313 by bolts passing through the second connecting holes 3132 and the first connecting parts 3141. The connection between each second connecting hole 3132 and the first connecting part 3141 forms a second connecting point. In this example, the three second connecting points are evenly arranged around the motor shaft 312 on the outside of the motor shaft 312. In other embodiments, it is also feasible to provide two or four or more first connection points / second connection points, as long as the connection between the connection plate 313 and the guide member 41 or between the connection plate 313 and the connection sleeve 314 can be fixed.

[0043] The connecting sleeve 314 is also provided with three second connecting parts 3142, which are staggered with the first connecting parts 3141 and are used to fix the control circuit board 316 of the motor. In order to prevent the rotating part 31B from interfering with the fixed part 31A during the rotation process, the control circuit board 316 and the moving part 31B have a certain distance and do not contact.

[0044] The connecting plate 313 and the connecting sleeve 314 are respectively made of metal, and can withstand a large tangential force during the high-speed rotation of the wind wheel 32 , thereby ensuring the strength of the motor 31 .

[0045] A coil 317 is provided in the space between the inner wall of the motor housing 311 of the motor 31 and the outer wall of the connecting sleeve 314. The motor shaft 312 is driven to rotate by controlling the on and off of power of the coil 317, thereby driving the motor housing 311 and the wind wheel to rotate.

[0046] See also Figure 2 and Figure 8 As shown, a partition 5 is provided between the filter assembly 2 and the fan assembly 3, and a ventilation hole 51 is provided in the middle of the partition 5. In order to increase the ventilation efficiency of the ventilation hole 51, the middle of the partition 5 extends toward the filter assembly 2 to form a ventilation portion 50. The ventilation portion 50 is a grille structure, and the ventilation holes 51 are formed between the grilles.

[0047] See also Figure 2 As shown, the air duct assembly 4 includes a guide member 41 and a cover shell 43 connected to the motor 31 . The space between the guide member 41 and the inner wall of the shell 1 forms an air duct 401 . The guide member 41 is provided with a guide plate 411 to guide the gas in the air duct 401 .

[0048] An air outlet plate 6 is provided on the windward side of the air duct assembly 4 of the shell 1, and a control panel 7 is provided in the middle of the air outlet plate 6. The control panel 7 is used for the user to adjust the switch position and other functions of the air purifier. The air outlet plate 6 is provided with a grille structure, and the gaps between the grilles form an air outlet 12.

[0049] The working process of the utility model is as follows: Figure 2 As shown, the motor is powered on to start the motor shaft 312 to rotate, and the motor housing 311 drives the wind wheel 32 to rotate, so that the unpurified air outside the air purifier is sucked in from the air inlet 11 to form an airflow. The airflow flows in the direction indicated by the arrow, thereby entering the filter element side of the filter assembly 2, reaching the middle of the filter element after being filtered by the filter element, and then passing through the ventilation hole 51 of the partition 5 to enter the middle of the wind wheel 32. As the wind wheel 32 rotates, it is discharged from the side of the wind wheel 32 to the air duct 401, and then the purified air is discharged from the air outlet 12 after being guided by the guide plate 411.

[0050] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. An air purifier, comprising a housing and a fan assembly arranged in the housing for accelerating air flow, the fan assembly comprising a motor and a wind wheel, the motor comprising a fixed part and a rotating part connected to each other for relative rotation, the fixed part being fixedly arranged relative to the housing, and the rotating part being connected to the wind wheel to drive the wind wheel to rotate; characterized in that: The rotating part includes a motor housing and a motor shaft which are relatively fixedly connected. The motor housing is arranged outside the motor shaft. The motor housing is fixedly connected to the wind wheel, so that the rotation of the motor housing drives the wind wheel to rotate.

2. An air purifier according to claim 1, characterized in that: The center of the wind wheel is provided with a mounting groove, the motor housing is fixedly mounted in the mounting groove, and the outer side wall of the motor housing abuts against the side wall of the mounting groove.

3. An air purifier according to claim 2, characterized in that: The motor housing and the wind wheel are connected by injection molding.

4. An air purifier according to claim 3, characterized in that: The motor housing is provided with a clearance hole, and the wind wheel is provided with a main body located on the outside of the motor housing, a pressing part located on the inside of the motor housing, and a connecting part located in the clearance hole, and the connecting part connects the pressing part and the main body as a whole, so that the main body, the pressing part and the connecting part cooperate to form a limiting structure of the motor housing.

5. An air purifier according to claim 1, characterized in that: The motor housing is riveted to the end of the motor shaft.

6. An air purifier according to claim 5, characterized in that: The motor housing is provided with a through hole, the motor shaft is passed through the through hole and the end thereof is fixedly embedded in the wind wheel.

7. An air purifier according to claim 1, characterized in that: The fixed part includes a connection component sleeved outside the motor shaft, and the connection component is relatively fixedly connected to the housing through a plurality of first connection points, and the first connection points are arranged at intervals around the motor shaft.

8. An air purifier according to claim 7, characterized in that: The connecting component includes a connecting disk and a connecting sleeve, the first connecting point is located on the connecting disk so that the connecting component and the shell are relatively fixedly connected through the connecting disk, the connecting sleeve and the connecting disk are connected through multiple second connecting points, and the second connecting points are arranged at intervals around the motor shaft, the connecting sleeve is connected to the motor shaft through a bearing, so that the connecting sleeve and the motor shaft form a relative rotation connection, thereby realizing the relative rotation connection between the fixed part and the rotating part of the motor.

9. An air purifier according to claim 8, characterized in that: The connecting plate and the connecting sleeve are respectively made of metal.

10. An air purifier according to claim 1, characterized in that: It also includes an air duct assembly and a filter assembly. The shell is provided with an air inlet and an air outlet. The filter assembly, fan assembly, and air duct assembly are arranged in sequence from the air inlet to the air outlet. The filter assembly is used to purify the air, and the air duct assembly is used to guide the airflow from the fan assembly.

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