CN114109863A

CN114109863A - Casing subassembly, electric fan and electric appliance

Info

Publication number: CN114109863A
Application number: CN202010881367.4A
Authority: CN
Inventors: 杨继峰; 乔正忠; 熊美健; 彭敏
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd; Welling Wuhu Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd; Welling Wuhu Motor Manufacturing Co Ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2022-03-01
Anticipated expiration: 2040-08-27
Also published as: CN114109863B

Abstract

The application provides a casing subassembly, electric fan and electric appliance, the casing subassembly includes: the impeller comprises an impeller body, a plurality of first blades are arranged on the outer edge of the upper surface of the impeller body at intervals along the circumferential direction, a hollow cylinder is arranged on the lower surface of the impeller body, and a shaft hole is formed in the middle of the impeller body; the shell is cylindrical, and a bearing chamber matched with the shaft hole is formed in the shell; the shaft hole is located to the pot head of bearing room, and in the barrel stretched into the casing, it has the cavity to enclose between the internal perisporium of periphery wall and the casing of barrel, the passageway intercommunication between cavity and two adjacent first blades. The application provides a casing subassembly through set up the barrel in its impeller bottom surface, has avoided the middle part of the air current flow direction casing that flows from each fluid outlet of impeller, has effectively solved the problem of air duct structure air current to casing middle part diffusion, and the motor efficiency who corresponds is high, wind-force is big.

Description

Casing subassembly, electric fan and electric appliance

Technical Field

The application belongs to the technical field of household appliances, and more particularly relates to a housing assembly, an electric fan and an electric appliance.

Background

High efficiency and large suction force are always the technical points of attention and pursuit of the motor in the field of dust collectors. The air duct structure of the motor for the dust collector can introduce air flow into the shell or semi-closed shell blades through the diffuser, so that a part of air flow flows to the middle of the shell, the air flow is diffused to the middle in the shell, the improvement of the motor efficiency is limited by adopting the air duct structure, and the suction force of the motor is difficult to meet the use requirement.

Disclosure of Invention

An object of the embodiment of this application is to provide a casing subassembly to solve exist among the prior art because the diffuser introduces the casing middle part diffusion with the air current, and then the improvement of restriction motor efficiency, motor suction is difficult to satisfy user demand's technical problem.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: providing a chassis assembly comprising:

the impeller comprises an impeller body, a plurality of first blades are arranged on the outer edge of the upper surface of the impeller body at intervals along the circumferential direction, a hollow cylinder is arranged on the lower surface of the impeller body, and a shaft hole is formed in the middle of the impeller body;

the shell is cylindrical and is connected with the impeller body, and a bearing chamber matched with the shaft hole is arranged in the shell;

one end of the bearing chamber is sleeved in the shaft hole, the cylinder body extends into the casing, a cavity is defined between the outer peripheral wall of the cylinder body and the inner peripheral wall of the casing, and the cavity is communicated with a channel between two adjacent first blades.

In one embodiment, a plurality of second blades are arranged in the cavity at intervals along the circumferential direction, and a radially closed and axially communicated air channel is defined between the outer circumferential wall of the cylinder and the second blades.

In one embodiment, the outer peripheral wall of the cylinder is in contact with the inner side surface of the second blade.

In one embodiment, a gap is formed between two adjacent first blades on the periphery of the impeller body, so that a channel between the two adjacent first blades is communicated with the air duct.

In one embodiment, the length of the cylinder in a direction parallel to the axis of the impeller body at least exceeds 2/3 the length of the second vane.

In one embodiment, the upper surface and the lower surface of the second blade are both convexly curved surfaces.

In one embodiment, the outer side surface and the inner side surface of the second blade are both convex cambered surfaces.

In one embodiment, one end of the second vane close to the lower surface of the impeller body extends out of the casing and extends to the axial extension surface position of the peripheral wall of the casing.

In one embodiment, the second blade is disposed obliquely with respect to a direction of the central axis of the casing, and a mounting angle of the second blade is opposite to a mounting angle of the first blade.

In one embodiment, ribs are respectively disposed between the outer peripheral wall of the bearing chamber and each of the second blades, clamping grooves adapted to the ribs are respectively formed in the positions of the cylinder body corresponding to the ribs, and the cylinder body is clamped on the ribs through the clamping grooves.

In one embodiment, a supporting table surface is formed at one end of each rib close to the outer peripheral wall of the bearing chamber, and a convex ring is formed on the lower surface of the impeller body in an axial extending mode at the shaft hole and abuts against the supporting table surface.

In one embodiment, the ribs have a height that decreases in a direction radially outward of a central axis of the housing.

In one embodiment, the second blade comprises a head and a root connected to the rib, the thickness of the second blade decreasing from the root to the head.

Another object of the present application is to provide an electric fan, including the above-mentioned casing assembly.

It is a further object of the present application to provide an electric appliance comprising the above electric blower.

In one embodiment, the electric appliance is a vacuum cleaner, a hand dryer, a fan, an air pump, an air cleaning device, a range hood, or a centrifugal pump.

The application provides a casing subassembly's beneficial effect lies in: compared with the prior art, this application casing subassembly through set up the barrel in its impeller bottom surface, has avoided the middle part of the air current flow direction casing that flows from each fluid outlet of impeller, has effectively solved the problem of air duct structure air current to casing middle part diffusion, and the motor efficiency that corresponds is high for the electric fan wind-force that has this casing subassembly is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a chassis assembly according to an embodiment of the present disclosure;

FIG. 2 is a perspective view of the impeller in the housing assembly shown in FIG. 1;

FIG. 3 is a perspective view of a housing of the housing assembly of FIG. 1;

fig. 4 is a schematic structural view of the enclosure assembly shown in fig. 1 mounted on an electric fan.

Wherein, in the figures, the respective reference numerals:

10-a housing assembly; 11-an impeller; 100-an impeller body; 200-a housing; 300-wind cover; 400-moving impeller; 500-a drive mechanism; 101-an axle hole; 102-a convex ring; 103-a ring surface; 104-a gap; 110-a first blade; 111-a fluid inlet; 112-a fluid outlet; 113-a channel; 120-barrel; 121-card slot; 201-air duct; 202-a ventilation slot; 203-air outlet; 210-a bearing chamber; 220-a second blade; 230-ribs; 211-glue containing slot; 221-upper surface; 222-lower surface; 223-outer side; 224-medial side; 225-root; 226-a head; 231-a support table; 301-air inlet; 410-moving impeller base; 420-moving blades; 510-a circuit board; 520-a motor; 521-a stator assembly; 522-a rotor assembly; 523-rotating shaft; 524-magnetic ring; 525-bearing.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3 together, a housing assembly 10 according to an embodiment of the present application will now be described. The casing assembly 10 includes an impeller 11 and a casing 200 connected together, and the casing assembly 10 may be an integrally formed structure or a split structure formed by assembling and fixing the impeller 11 and the casing 200 together.

The impeller 11 includes an impeller body 100, a plurality of first blades 110 are circumferentially arranged at intervals on an outer edge of an upper surface of the impeller body 100, a hollow cylinder 120 is arranged on a lower surface of the impeller body 100, the cylinder 120 and the impeller body 100 are coaxially arranged, and a shaft hole 101 is formed in the middle of the impeller body 100. The first blade 110 may be a planar or curved blade; the first blades 110 may be uniformly spaced on the annular surface 103 of the periphery of the impeller body 100, and the horizontal plane of the outer edge of the annular surface 103 is lower than the horizontal plane of the inner edge of the annular surface 103. Adjacent two first blades 110 form a fluid inlet 111 at the inner edge, adjacent two first blades 110 form a fluid outlet 112 at the outer edge, and a channel 113 for fluid communication is formed between adjacent two first blades 110. By setting the outer edge of the annular surface 103 lower than the inner edge of the annular surface 103, the fluid can be diffused obliquely downward along the annular surface 103 at the lower side after entering the passage 113 formed by the first blade 110, thereby facilitating the improvement of the diffusion capability and the flow guiding effect.

The casing 200 may be an injection molded part, the casing 200 is cylindrical, and the casing 200 is connected to the impeller body 100; the inside of casing 200 is equipped with the bearing room 210 of adaptation shaft hole 101, and the bearing installation of the inside power supply motor pivot one end of bearing room 210 has seted up on the inner wall of bearing room 210 and has contained gluey groove 211, and transition fit adopts thermosetting type glue to bond fixedly between bearing and the bearing room 210.

One end of the bearing chamber 210 is sleeved in the shaft hole 101, the cylinder 120 extends into the casing 200, and a chamber is defined between the outer circumferential wall of the cylinder 120 and the inner circumferential wall of the casing 200 and is communicated with the channel 113 between two adjacent first blades 110. That is to say, the cylinder 120 on the bottom surface of the impeller body 100 plays a role in blocking the airflow from flowing to the middle of the casing 200, so as to prevent the airflow from spreading to the middle of the casing 200, thereby improving the efficiency of the corresponding motor and improving the wind power of the outlet air.

The application provides a casing subassembly 10 compares with prior art, through set up barrel 120 in its impeller body 100 bottom surface, has avoided the middle part of the air current flow direction casing 200 that flows out from each fluid outlet 112 of impeller 11, has effectively solved the problem of air current flow direction casing 200 middle part diffusion among the wind channel structure, and the motor efficiency that corresponds is high for the electric fan wind-force that has this casing subassembly 10 obtains effectively improving.

In an embodiment, as shown in fig. 1 to 3, a plurality of second blades 220 are disposed between the outer circumferential wall of the cylinder 120 and the inner circumferential wall of the casing 200 at intervals in the circumferential direction, the plurality of second blades 220 may be uniformly arranged in the circumferential direction inside the casing 200, the number of the second blades 220 may be set to be smaller than the number of the first blades 110, and the installation angle of the second blades 220 is opposite to the installation angle of the first blades 110. The outer peripheral wall of the cylinder 120 may have a space with the inner side surface 224 of the second vane 220 or may contact with both. A radially closed and axially communicated air channel 201 is defined between the outer peripheral wall of the cylinder 120 and the second vane 220, and the air channel 201 is communicated with the channel 113 between two adjacent first vanes 110.

In one embodiment, as shown in fig. 1, the outer peripheral wall of the cylinder 120 contacts the inner side surface 224 of the second vane 220, so that the fluid flows more regularly in the defined air channel 201, and the generation of turbulence is reduced.

In an embodiment, as shown in fig. 1, a gap 104 is formed between two adjacent first blades 110 on the periphery of the impeller body 100, so that the channel 113 between two adjacent first blades 110 is communicated with the air duct 201. The first blades 110 have a leading blade edge disposed at the fluid inlet 111 and a trailing blade edge disposed at the fluid outlet 112, respectively. The rear edges of the first blades 110 are arranged to extend relative to the cylinder 120 on the lower surface, and the annular surface 103 is provided with a gap 104 between the outer edges of two adjacent first blades 110, so that the fluid outlet 112 between the outer edges of the two first blades 110 is communicated with the air duct 201 through the gap 104.

The leading edge and/or the trailing edge of the vane may be disposed in a spatial inclination with respect to the axis of the annular base, so that by disposing the outer edge of the first vane 110 in an inclined manner, the impact loss at the fluid outlet 112 and/or the fluid inlet 111 can be reduced, and the effect of improving the diffuser capacity can be achieved.

In one embodiment, the length of the cylinder 120 at least exceeds 2/3 of the length of the second blade 220 in the direction parallel to the axis of the impeller body 100, so that a longer air duct 201 can be formed between the impeller body 100 and the casing 200 in the axial direction to ensure the air volume.

In an embodiment, referring to fig. 3, the upper surface 221 and the lower surface 222 of the second vane 220 are both convex surfaces, so that the flow guiding effect of the second vane 220 is better, and the fluid can flow more smoothly along the second vane 220.

In an embodiment, referring to fig. 3, the outer side surface 223 and the inner side surface 224 of the second vane 220 are both convex arc surfaces, so that the flow guiding effect of the second vane 220 is better, and the fluid can flow more smoothly along the second vane 220. Specifically, at least a part of the inner side surface 224 can be an arc surface matched with the outer peripheral wall of the cylinder body, and the arc surface of the inner side surface 224 is attached to the outer peripheral wall of the cylinder body 120, so that the flow guiding effect can be further improved.

In an embodiment, referring to fig. 1 and 3, one end of the second vane 220 close to the lower surface of the impeller body 100 extends out of the casing 200 and extends to an axial extension surface position of the outer peripheral wall of the casing 200, that is, the top of the second vane 220 extends out relative to the casing 200, and the outer side surface of the extended part extends to the axial extension surface position of the outer peripheral wall of the casing 200, so that the assembly between the motor housing and the casing 200 is not affected, and the air volume can be increased for expanding the air duct 201.

In an embodiment, referring to fig. 3, the second blades 220 are disposed in an inclined manner with respect to the direction of the central axis of the casing 200, each second blade 200 is inclined in the same direction, and the installation angle of the second blade 220 is opposite to the installation angle of the first blade 110, i.e. the two rotation directions are opposite. More spaces are reserved for the air duct 201 through the inclined arrangement of the second blades 220, and then the air quantity can be increased.

In an embodiment, referring to fig. 1 and 3, ribs 230 are respectively disposed between the outer circumferential wall of the bearing chamber 210 and each second vane 220, slots 121 adapted to the ribs 230 are respectively disposed at positions of the cylinder 120 corresponding to the ribs 230, and the cylinder 120 is clamped on the ribs 230 through the slots 121. The two adjacent ribs 230 and the two second blades 220 jointly enclose a ventilation slot 202, the number of the ribs 230 is equal to that of the second blades 220, and the width of the ribs 230 can be set according to the actual application requirement of the motor. When the impeller 11 is installed, the shaft hole 101 is aligned with the bearing chamber 210, the bearing chamber 210 is inserted into the shaft hole 101, the impeller 11 is rotationally adjusted, and the clamping grooves 121 of the cylinder 120 are clamped into the corresponding ribs 230, so that the assembly between the impeller 11 and the casing 200 is completed, and the operation is simple.

In an embodiment, referring to fig. 1 to 3, a supporting table 231 is formed at an end of the rib 230 close to the outer circumferential wall of the bearing chamber 210, a space is formed between the supporting table 231 and a top end surface of the bearing chamber 210, a protruding ring 102 is axially formed on the lower surface of the impeller body 100 at the shaft hole 101, the protruding ring 102 abuts against the supporting table 231, and after the impeller body 11 and the casing 200 are assembled, a bottom end surface of the protruding ring 102 on the lower surface of the impeller body 100 abuts against each supporting table 231, so that the assembly is facilitated, and the impeller 11 is prevented from shaking during the assembly.

In an embodiment, referring to fig. 3, the height of the ribs 230 is gradually decreased along the radial direction outward of the central axis of the housing 200, so that the ribs 230 have high connection strength with the outer peripheral wall of the bearing chamber 210, and the ribs 230 can bear the operation of high rotation speed of the motor, and are safe and reliable.

In one embodiment, referring to FIG. 3, the second blade 220 includes a root 225 and a head 226 connected together, the root 225 is connected to a fillet 230, and the thickness of the second blade 220 decreases from the root 225 to the head 226. In this way, one surface of each second vane 220 can form a good guide surface, and the space occupied by each second vane 220 can be reduced. The inner and outer sides of the second blade 220 are arc surfaces, the upper and lower sides are arc surfaces, and the corners of the head 226 are smooth transition, which is beneficial to reducing wind resistance and reducing loss of kinetic energy.

Referring to fig. 1, fig. 2 and fig. 4, an electric blower according to an embodiment of the present application includes a housing assembly 10 according to the above embodiment. Through setting up the casing subassembly 10 of above-mentioned embodiment, can effectively solve the problem of air current to casing 200 middle part diffusion among the wind channel structure, the motor is efficient, and wind-force is big.

The electric fan further comprises a fan cover 300, an impeller 400 and a driving mechanism 500, wherein an air inlet 301 is formed at one end of the fan cover 300, and an air outlet 203 is formed at one end of the machine shell 200 far away from the fan cover 300; one end of the fan housing 300 near the air outlet 203 is fixedly sleeved on the housing 200, the driving mechanism 500 includes a circuit board 510 and a motor 520, the motor 520 is electrically connected to the circuit board 510, and the circuit board 510 has a lead (not shown) for connecting to an external power source. The motor 520 comprises a stator assembly 521 and a rotor assembly 522, the rotor assembly 522 comprises a rotating shaft 523 and a magnetic ring 524 arranged on the rotating shaft 523, a bearing 525 is fixed on the rotating shaft 523 of the rotor assembly 522, the outer diameter of the magnetic ring 524 is smaller than that of the bearing 525, the magnetic ring 524 is arranged on one side far away from the movable impeller 400, and the bearing 525 is arranged in the bearing chamber 210; the impeller 400 includes an impeller base 410 and a plurality of moving blades 420 provided on an outer circumferential wall of the impeller base 410, and the rotating shaft 523 passes through the bearing chamber 210 and is connected to the impeller base 410.

The circuit board 510 is installed at one end of the motor 520 far away from the fan housing 300, a plurality of connection posts are arranged on a frame of the electric fan, and the circuit board 510 and the connection posts are fixed by screws. The two ends of the bearing chamber 210 are open, the rotating shaft 523 passes through the bearing 525 and is connected and fixed with the movable impeller 400, after the circuit board 510 is powered on, the stator assembly 521 drives the rotor assembly 522 to rotate, and the movable impeller 400 is driven to rotate in the fan housing 300 through the rotating shaft 523. The circuit board 510 is completely exposed out of the frame, which facilitates the wiring operation of the leads and also facilitates the heat dissipation of the circuit board 510; the circuit board 510 is spaced from the air outlet 203 to prevent the circuit board 510 from blocking the air outlet 203.

The electric appliance provided by the embodiment of the application comprises the electric fan of the embodiment. Through setting up the electric fan of above-mentioned embodiment, can effectively solve the problem of air current to casing 200 middle part diffusion among the wind channel structure, the motor efficiency is high, and wind-force is big.

In one embodiment, the electrical appliance can be, but is not limited to, a vacuum cleaner, a hand dryer, a fan, an air pump, an air cleaning device, a range hood, or a centrifugal pump, and can be any other device that utilizes an electric fan to generate pressure energy and kinetic energy of air.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A housing assembly, characterized by: the method comprises the following steps:

2. The enclosure assembly of claim 1, wherein: a plurality of second blades are arranged in the cavity at intervals along the circumferential direction, and an air channel which is radially closed and is axially communicated is defined between the outer peripheral wall of the cylinder and the second blades.

3. The enclosure assembly of claim 2, wherein: the periphery wall of barrel with the inside facial features of second blade pastes and contacts.

4. The enclosure assembly of claim 2, wherein: and a gap is formed between every two adjacent first blades on the periphery of the impeller body, so that a channel between every two adjacent first blades is communicated with the air duct.

5. The enclosure assembly of claim 2, wherein: the length of the cylinder in a direction parallel to the axis of the impeller body at least exceeds 2/3 the length of the second vane.

6. The enclosure assembly of claim 2, wherein: and the upper surface and the lower surface of the second blade are both convex cambered surfaces.

7. The enclosure assembly of claim 2, wherein: and the outer side surface and the inner side surface of the second blade are both convex cambered surfaces.

8. The enclosure assembly of claim 2, wherein: one end of the second blade, which is close to the lower surface of the impeller body, extends out of the casing and extends to the axial extending surface of the peripheral wall of the casing.

9. The enclosure assembly of claim 2, wherein: the second blade is obliquely arranged relative to the direction of the central shaft of the machine shell, and the installation angle of the second blade is opposite to the installation angle of the first blade.

10. The enclosure assembly of any of claims 2-9, wherein: ribs are respectively arranged between the peripheral wall of the bearing chamber and each second blade, clamping grooves matched with the ribs are respectively formed in the positions, corresponding to the ribs, of the cylinder body, and the cylinder body is clamped on the ribs through the clamping grooves.

11. The enclosure assembly of claim 10, wherein: one end of each rib, which is close to the outer peripheral wall of the bearing chamber, is provided with a supporting table surface, and the lower surface of the impeller body axially extends in the shaft hole to form a convex ring which is abutted against the supporting table surface.

12. The enclosure assembly of claim 10, wherein: the height of the ribs is gradually reduced along the radial outward direction of the central shaft of the shell.

13. The enclosure assembly of claim 10, wherein: the second blade comprises a head part and a root part which are connected, the root part is connected with the ribs, and the thickness of the second blade is gradually reduced from the root part to the head part.

14. An electric fan, its characterized in that: comprising a housing assembly according to any of claims 1-13.

15. An electric appliance, characterized in that: comprising an electric fan according to claim 14.

16. The powered appliance of claim 15, wherein: the electric appliance is a dust collector, a hand dryer, a fan, an air pump, air cleaning equipment, a range hood or a centrifugal pump.