CN221003191U - Fan and cleaning device - Google Patents

Abstract

The utility model provides a fan and a cleaning device. The fan comprises: the shell is provided with a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is provided with an air inlet, the second accommodating cavity is provided with an air outlet, and the first accommodating cavity is communicated with the second accommodating cavity through a communication port; the impeller assembly comprises a primary impeller, a secondary impeller and a guide impeller, the primary impeller and the secondary impeller are driven to rotate by the same driving piece, and the guide impeller is fixedly arranged in the first accommodating cavity; the first-stage impeller is positioned in the first accommodating cavity and is used for entering air from the air inlet along the axial direction and exiting air from the communication opening along the axial direction through the guide impeller, and the second-stage impeller is positioned in the second accommodating cavity and is used for entering air from the communication opening along the axial direction and exiting air from the air outlet along the radial direction. Thus, the negative pressure generated by the whole fan is higher. Under the condition that the negative pressure required to be achieved is unchanged, the rotating speed of the driving piece can be lower, and the noise generated during working is smaller.

Description

Fan and cleaning device

Technical Field

The utility model relates to the technical field of cleaning devices, in particular to a fan and a cleaning device.

Background

With the progress of technology, cleaning devices are becoming more and more widely used. The cleaning device is generally provided with a fan, and the function of dust collection is realized by utilizing negative pressure generated by the operation of the fan.

Cleaning devices on the market generally employ a fan of a single impeller construction. Specifically, the fan includes an impeller and a driving member for driving the impeller to rotate. When the air conditioner works, the impeller rotates under the drive of the driving piece, negative pressure is generated in the axial direction of the impeller, air is sucked, and sucked air flows out in the radial direction through the impeller.

With the increasing demands on the cleaning effect, more and more cleaning devices can increase the negative pressure by increasing the rotational speed of the driving element. Thus, the rotation speed of the driving piece is required to be higher, the production cost is higher, and the noise is larger.

Disclosure of utility model

In order to at least partially solve the problems of the prior art, according to one aspect of the present utility model, a fan is provided. The fan comprises: the shell is provided with a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is provided with an air inlet, the second accommodating cavity is provided with an air outlet, and the first accommodating cavity is communicated with the second accommodating cavity through a communication port; the impeller assembly comprises a primary impeller, a secondary impeller and a guide impeller, the primary impeller and the secondary impeller are driven to rotate by the same driving piece, and the guide impeller is fixedly arranged in the first accommodating cavity; the first-stage impeller is positioned in the first accommodating cavity and is used for entering air from the air inlet along the axial direction and exiting air from the communication opening along the axial direction through the guide impeller, and the second-stage impeller is positioned in the second accommodating cavity and is used for entering air from the communication opening along the axial direction and exiting air from the air outlet along the radial direction.

According to the fan provided by the utility model, the primary supercharging and the secondary supercharging are carried out on the inlet air by arranging the primary impeller and the secondary impeller. Thus, the negative pressure generated by the whole fan is higher. Under the condition that the negative pressure required to be achieved is unchanged, the rotating speed of the driving piece can be lower, and the noise generated during working is smaller. In addition, the requirement on the rotating speed of the driving piece is lower, and the production cost can be effectively reduced. When being applied to cleaning device, under the unchangeable condition of driving piece rotational speed, the negative pressure that the fan produced is higher, and cleaning effect is better. Under the condition of meeting certain cleaning effect, namely under the condition of certain negative pressure, the rotating speed of the driving piece can be lower, and the noise generated during cleaning is smaller.

Illustratively, the inducer includes a plurality of guide vanes that direct the rotating airflow into a radial airflow. The air flow guiding impeller guides the air, so that the air after the primary impeller is pressurized can flow out of the communication port and enter the second accommodating cavity more intensively and smoothly. The arrangement makes the wind flow in the fan smoother and the suction better.

Illustratively, the primary impeller includes a plurality of primary blades, the turning direction of the guide vanes being the same as the turning direction of the primary blades. The first-stage blades and the guide blades with the same rotation direction can enable wind passing through the first-stage blades to pass through the guide blades more smoothly. When the guide vane guides the flowing wind, the direction of the guide vane is the same as the wind flowing direction, so that the blocking of the wind can be reduced as much as possible, namely the loss of the wind is reduced, and the suction force of the fan is further ensured.

Illustratively, a primary air outlet flow path is formed between adjacent two primary blades at intervals, the primary air outlet flow path being configured to cause air flow from the center of the primary impeller to the outer edge of the primary impeller. The arrangement ensures that the wind entering the primary impeller can smoothly flow from the center to the outer edge, and the suction force of the fan is better ensured.

Illustratively, a wind-guiding flow path is formed between two adjacent guide vanes at intervals, and is configured to enable air flow to flow from the outer edge of the guide vane to the center of the guide vane. The setting like this has better effect of gathering to the air-out of one-level impeller, guarantees that wind can more fully, more smoothly enter into in the second grade impeller, reduces the loss of wind in first holding intracavity, and induced draft efficiency is higher.

Illustratively, the secondary impeller includes a plurality of secondary blades, the number of guide vanes being different from the number of primary blades, the number of secondary blades being different from the number of guide vanes. By the arrangement, the wind between the primary impeller and the guide vane wheel and between the secondary impeller and the guide vane wheel flows smoothly, and the suction force of the fan is better.

Illustratively, the number of guide vanes is an odd number. Therefore, resonance among the guide vanes can be better avoided, and further, shaking of the whole guide vane wheel is reduced, and noise is smaller.

Illustratively, the driving member is connected to a rotating shaft, and the primary impeller, the secondary impeller and the rotating shaft are integrally formed. Therefore, the rotating shaft drives the primary impeller and the secondary impeller to rotate simultaneously, and the structure is simpler and more reasonable. The integrated structure can better ensure the stability of connection among the primary impeller, the secondary impeller and the rotating shaft. When the driving piece drives the rotating shaft to rotate, the primary impeller and the secondary impeller can be driven better, the rotation is more stable, and the suction force of the fan is more stable.

The housing is further formed with a third accommodation chamber, the first accommodation chamber, the second accommodation chamber and the third accommodation chamber being disposed in sequence along an axial direction, and the driving member being disposed in the third accommodation chamber. Like this, the third holding chamber can provide more stable accommodation environment for the driving piece, avoids the driving piece to receive outside influence, guarantees the stability of its operation.

According to another aspect of the present utility model there is provided a cleaning device comprising a body and a fan as any one of the above, the fan being disposed within the body.

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Advantages and features of the utility model are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings are included to provide an understanding of the utility model and are incorporated in and constitute a part of this specification. Embodiments of the present utility model and their description are shown in the drawings to explain the principles of the utility model. In the drawings of which there are shown,

FIG. 1 is a perspective view of a blower according to an exemplary embodiment of the utility model;

FIG. 2 is a cross-sectional view of a blower according to an exemplary embodiment of the utility model;

FIG. 3 is a cross-sectional view of a wind turbine at a primary blade according to an exemplary embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a wind turbine at a guide vane according to an exemplary embodiment of the present utility model;

FIG. 5 is a perspective view of an impeller assembly and shaft according to an exemplary embodiment of the present utility model; and

Fig. 6 is a perspective view of a inducer according to an exemplary embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

100. A housing; 110. a first accommodation chamber; 120. a second accommodation chamber; 130. an air inlet; 140. an air outlet; 150. a communication port; 160. a third accommodation chamber; 200. an impeller assembly; 210. a primary impeller; 211. a primary blade; 212. a first wheel disc; 213. a primary air outlet flow passage; 213a, a third end; 213b, fourth end; 220. a secondary impeller; 221. a secondary blade; 222. a second wheel disc; 230. a inducer; 231. a guide vane; 231a, a first end; 231b, a second end; 232. a diversion wheel disc; 233. an air guide flow passage; 233a, a first flow guiding end; 233b, a second flow guiding end; 300. a driving member; 310. a rotating shaft; 400. and (5) connecting the cables.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the utility model. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the utility model by way of example only and that the utility model may be practiced without one or more of these details. Furthermore, some technical features that are known in the art have not been described in detail in order to avoid obscuring the utility model.

In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present utility model. It will be apparent that embodiments of the utility model may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

According to one aspect of the present utility model, a blower is provided. Referring to fig. 1 and 2 in combination, a blower may include a housing 100 and an impeller assembly 200. The casing 100 may provide a stable accommodating environment for the impeller assembly 200, and to a certain extent, separate the impeller assembly 200 from the outside, so as to ensure stable operation of the impeller assembly 200, and further ensure stability of air suction of the fan. The housing 100 may be formed with a first receiving chamber 110 and a second receiving chamber 120. The first accommodating cavity 110 is provided with an air inlet 130, the second accommodating cavity 120 is provided with an air outlet 140, and the first accommodating cavity 110 is communicated with the second accommodating cavity 120 through a communication port 150. The air inlet 130 may be disposed on a sidewall of the first accommodating cavity 110 away from the second accommodating cavity 120. The second accommodating cavity 120 may be generally volute-shaped overall to facilitate air outflow. Or the air inlet 130 and the air outlet 140 may be arranged in other ways according to the use, so as to ensure that the wind can sequentially pass through the first accommodating cavity 110 and the second accommodating cavity 120. The impeller assembly 200 may include a primary impeller 210, a secondary impeller 220, and a inducer 230. The primary impeller 210 and the secondary impeller 220 may be rotated by the same driving member 300.

Wherein, the primary impeller 210 may be located in the first accommodating chamber 110 and configured to intake air from the air intake 130 along the axial direction and to discharge air from the communication port 150 through the impeller 230 along the axial direction. The secondary impeller 220 is located in the second accommodating chamber 120 and is configured to intake air from the communication port 150 in the axial direction and to discharge air from the air outlet 140 in the radial direction. The wind enters the first accommodating cavity 110 along the axial direction through the air inlet 130, flows from the center to the outer edge along the radial direction under the action of the primary impeller 210, flows out along the axial direction under the flow guiding action of the flow guiding impeller 230, and flows out of the communicating port 150, namely, the axial inflow and the axial outflow of the wind are realized in the first accommodating cavity 110. The primary impellers 210 may be one or more sets. When the first-stage impellers 210 are multiple, the guide impellers 230 may be correspondingly arranged into multiple groups and are arranged in one-to-one correspondence with the first-stage impellers 210. It will be appreciated that the primary impeller 210 may be configured to provide a degree of pressurization. The air after the primary pressurization enters the second accommodating cavity 120 along the axial direction through the guide impeller 230, flows outwards from the center along the radial direction under the action of the secondary impeller 220, and finally flows out through the air outlet 140. Likewise, the two-stage impellers 220 may be one or more. The secondary impeller 220 is provided to secondarily pressurize the primary-pressurized wind.

The fan provided by the utility model performs primary pressurization and secondary pressurization on the entering air by arranging the primary impeller 210 and the secondary impeller 220. Thus, the negative pressure generated by the whole fan is higher. In the case where the negative pressure to be achieved is unchanged, the rotation speed of the driving member 300 can be lower, and the noise generated during operation is smaller. In addition, the rotation speed requirement of the driving member 300 is lower, and the production cost can be effectively reduced. When the fan is applied to the cleaning device, under the condition that the rotating speed of the driving piece 300 is unchanged, the negative pressure generated by the fan is higher, and the cleaning effect is better. Under the condition that a certain cleaning effect is met, namely, under the condition that negative pressure is certain, the rotating speed of the driving piece 300 can be lower, and noise generated during cleaning is smaller.

For example, referring to fig. 2, 4 and 6 in combination, the inducer 230 may include a plurality of guide vanes 231. The guide vane 231 may guide the rotating airflow into a radial airflow. The air guiding impeller 230 guides the air, so that the air pressurized by the primary impeller 210 can more intensively and smoothly flow out of the communication port 150 and enter the second accommodating cavity 120. The arrangement makes the wind flow in the fan smoother and the suction better. Illustratively, the inducer 230 may further include a inducer disk 232, and the guide vanes 231 may be secured to the inducer disk 232. Illustratively, the housing 100 may have a limiting groove therein, and an end of the guide vane 231 remote from the guide disk 232 may be inserted into the limiting groove.

3-5, The primary impeller 210 may include a plurality of primary blades 211. The turning direction of the guide vane 231 may be the same as that of the primary vane 211. The rotation direction is understood to mean the direction of rotation of the blade itself when it is directed radially outwards from the center. Taking the guide vane 231 of fig. 4 as an example, it has a first end 231a and a second end 231b, the first end 231a is near the center, and the second end 231b is near the outer edge. The connection line between the first end 231a and the center is OA, the connection line between the second end 231b and the center is OB, and the OA coincides with OB after clockwise pointer rotation, i.e. the rotation direction of the guide vane 231 is positive rotation. It will be appreciated that in the embodiment shown, the primary impeller 210 and the inducer 230 are both positively rotated in the direction of rotation. In an embodiment not shown, the rotation directions of the primary impeller and the inducer may both be counter-rotating. The primary blades 211 and the guide blades 231 having the same rotation direction, but the wind passing through the primary blades 211 more smoothly passes through the guide blades 231. When the guide vane 231 guides the flowing wind, the direction of the guide vane 231 is the same as the flowing direction of the wind, so that the blocking of the wind can be reduced as much as possible, namely the loss of the wind is reduced, and the suction force of the fan is further ensured. Illustratively, the primary impeller 210 may further include a first disk 212, and the primary blades 211 may be secured to the first disk 212.

For example, referring to fig. 3, a primary air outlet flow passage 213 may be formed between two adjacent primary blades 211 at intervals. The primary air outlet flow channels 213 may be configured to flow air from the center of the primary impeller 210 to the outer edges of the primary impeller 210. By this arrangement, the wind entering the primary impeller 210 can flow from the center to the outer edge more smoothly, and the suction force of the fan can be better ensured. Specifically, the primary air outlet flow channel 213 has a third end 213a near the center and a fourth end 213b near the outer edge. Along the third end 213a to the fourth end 213b, the flow area of the primary air outlet flow channel 213 gradually increases. Illustratively, the primary air outlet flow path 213 may be gradually deflected in a direction away from the center toward the clockwise direction.

For example, referring to fig. 2 and 4 in combination, the wind guide flow passages 233 may be formed at intervals between adjacent two guide vanes 231. The air guide flow channels 233 may be configured to flow air from the outer edge of the impeller 230 toward the center of the impeller 230. The wind passing through the primary impeller 210 flows into the guide air duct from the outer periphery. The wind guide flow path 233 may better guide the wind of the outer edge to the center. The arrangement has better convergence effect on the air outlet of the primary impeller 210, ensures that the air can enter the secondary impeller 220 more fully and smoothly, reduces the loss of the air in the first accommodating cavity 110, and has higher air suction efficiency. Specifically, the air guiding duct 233 may have a first guiding end 233a near the center and a second guiding end 233b near the outer edge. Along the first guiding end 233a to the second guiding end 233b, the flow area of the air guiding channel 233 may gradually increase. Illustratively, the flow area of the second flow directing end 233b may be greater than the flow directing area of the fourth end 213 b.

Illustratively, the secondary impeller 220 may include a plurality of secondary blades 221, the number of guide vanes 231 may be different from the number of primary blades 211, and the number of secondary blades 221 may be different from the number of guide vanes 231. During operation of the fan, the secondary blades 221 and the primary blades 211 rotate relative to the casing 100, and are moving blades, and the guide blades 231 are stationary relative to the casing 100, and are stationary blades. The number of stator vanes is different from the number of rotor blades. By this arrangement, the wind between the primary impeller 210 and the impeller 230 and the wind between the secondary impeller 220 and the impeller 230 can flow smoothly, and the suction force of the fan is improved. Illustratively, the number of secondary blades 221 and primary blades 211 may be the same. The number of the second stage blades 221 and the first stage blades 211 may be greater than the number of the guide blades 231. Thus, the blocking of wind is reduced as much as possible while the flow guiding function is ensured. Illustratively, the secondary impeller 220 may also include a second disk 222. The secondary blade 221 may be secured to a second disk 222.

For example, referring to fig. 4 and 6, the number of guide vanes 231 may be an odd number. During operation of the fan, the guide vane 231 inevitably vibrates. If the guide vanes 231 are provided in an even number, the guide vane 230 is integrally formed to be symmetrical. The vibration generated by the guide vane 231 at one side is transferred to the guide vane 231 at the opposite side, and the guide vane 231 at the opposite side has a certain vibration, so that the vibration is easier to induce after the conduction, the vibration of the whole guide vane 230 is more intense, and the noise is larger. In this embodiment, the guide vanes 231 are arranged in an odd number, so that resonance between the guide vanes 231 can be better avoided, and further, the overall shake of the impeller 230 is reduced, and the noise is smaller. For example, the number of primary blades 211 and/or secondary blades 221 may be an odd number. In this way, noise generated when the fan operates is further reduced. For example, the number of guide vanes 231 may be seven. Of course, in some embodiments, the number of guide vanes may be set to an even number.

For example, referring to fig. 2 and 5, the driving member 300 may be coupled with a rotation shaft 310, and the primary impeller 210, the secondary impeller 220, and the rotation shaft 310 may be integrally constructed. Thus, the rotating shaft 310 drives the primary impeller 210 and the secondary impeller 220 to rotate at the same time, and the structural arrangement is simpler and more reasonable. The integral structure can better ensure the connection between the primary impeller 210, the secondary impeller 220 and the rotating shaft 310 to be stable. When the driving piece 300 drives the rotating shaft 310 to rotate, the primary impeller 210 and the secondary impeller 220 can be driven better, the rotation is more stable, and the suction force of the fan is more stable. In some embodiments, the primary impeller, the secondary impeller, and the shaft may be provided as separate pieces.

For example, referring to fig. 2, the housing 100 may further be formed with a third receiving chamber 160, and the first receiving chamber 110, the second receiving chamber 120, and the third receiving chamber 160 are sequentially disposed in the axial direction. The driving member 300 may be disposed in the third receiving chamber 160. In this way, the third accommodating cavity 160 can provide a more stable accommodating environment for the driving member 300, so that the driving member 300 is prevented from being influenced by the outside, and the operation stability of the driving member is ensured. It is understood that the first receiving chamber 110 and the second receiving chamber 120 are communicated through the communication port 150, and only the through hole allowing the rotation shaft 310 to pass through may be provided between the second receiving chamber 120 and the third receiving chamber 160. Illustratively, the first receiving chamber 110 may be generally disc-shaped as a whole. The disk-shaped outer edge may be streamlined to facilitate air guiding. The second receiving chamber 120 may be substantially in the shape of a volute. The third receiving chamber 160 may be substantially cylindrical.

According to another aspect of the present utility model, there is also provided a cleaning device. The cleaning device may be a cleaning robot, a hand-held cleaning device, or the like. The cleaning device may include a body and any of the fans described above. Because this fan has adopted the technical scheme of any one of the above-mentioned embodiments, therefore this cleaning device has the beneficial effect that the technical scheme of above-mentioned embodiment brought at least, and no one is repeated here. In addition to this, the cleaning device may also comprise control elements, connection cables 400, etc. The control elements, the connection cable 400, etc. may have various structures that may be present or may occur in the future, and do not constitute a limitation on the scope of the present utility model.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", and "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, without limiting the scope of protection of the present utility model; the orientation terms "inner" and "outer" refer to the inner and outer relative to the outline of the components themselves.

For ease of description, regional relative terms, such as "over … …," "over … …," "on the upper surface of … …," "over," and the like, may be used herein to describe regional positional relationships of one or more components or features to other components or features shown in the figures. It will be understood that the relative terms of regions include not only the orientation of the components illustrated in the figures, but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A blower, comprising:

The shell is provided with a first accommodating cavity and a second accommodating cavity, an air inlet is formed in the first accommodating cavity, an air outlet is formed in the second accommodating cavity, and the first accommodating cavity is communicated with the second accommodating cavity through a communication port; and

The impeller assembly comprises a primary impeller, a secondary impeller and a guide impeller, wherein the primary impeller and the secondary impeller are driven to rotate by the same driving piece, and the guide impeller is fixedly arranged in the first accommodating cavity;

The first-stage impeller is located in the first accommodating cavity and is configured to be used for air inlet from the air inlet along the axial direction and air outlet from the communication port along the axial direction through the guide impeller, and the second-stage impeller is located in the second accommodating cavity and is configured to be used for air inlet from the communication port along the axial direction and air outlet from the air outlet along the radial direction.

2. The fan of claim 1 wherein the inducer includes a plurality of guide vanes that direct the rotating airflow into a radial airflow.

3. The fan of claim 2 wherein the primary impeller comprises a plurality of primary blades, the turning direction of the guide blades being the same as the turning direction of the primary blades.

4. A fan as claimed in claim 3, wherein a primary air outlet flow passage is formed between adjacent two of the primary blades at a spacing, the primary air outlet flow passage being configured to cause air flow from the centre of the primary impeller to the outer edge of the primary impeller.

5. The fan of claim 4, wherein a wind guide channel is formed between two adjacent guide vanes at intervals, and the wind guide channel is configured to enable air flow from the outer edge of the guide vane to the center of the guide vane.

6. The fan of claim 3 wherein the secondary impeller comprises a plurality of secondary blades, the number of guide vanes being different from the number of primary blades, the number of secondary blades being different from the number of guide vanes.

7. A fan as claimed in claim 3, wherein the number of guide vanes is an odd number.

8. The fan of claim 1, wherein the driving member is connected to a rotating shaft, and the primary impeller, the secondary impeller and the rotating shaft are integrally formed.

9. The fan according to any one of claims 1 to 8, wherein the housing is further formed with a third accommodation chamber, the first accommodation chamber, the second accommodation chamber, and the third accommodation chamber being disposed in order in the axial direction, the driving member being disposed in the third accommodation chamber.

10. A cleaning apparatus comprising a main body, further comprising a blower according to any one of claims 1-9, the blower being disposed within the main body.