CN218325503U

CN218325503U - Fan system for cleaning machine and cleaning machine

Info

Publication number: CN218325503U
Application number: CN202222507808.1U
Authority: CN
Inventors: 刘逸; 刘畅; 郭国良; 郑军妹
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-01-17
Anticipated expiration: 2032-09-20

Abstract

The utility model relates to a fan system and cleaner for cleaner, include: the fan cover is provided with an air inlet; the impeller comprises a hub and blades which are arranged on the outer peripheral wall of the hub and are sequentially arranged along the circumferential direction of the hub; the blades comprise a first blade and a second blade which are sequentially arranged in a staggered mode along the circumferential direction of the hub, the axial width of the first blade along the hub is marked as L1, the axial width of the second blade along the hub is marked as L2, L1 is larger than L2, and the front edge of the first blade is provided with a flow guide part extending from the outer circumferential surface of the hub to the suction surface of the second blade. The air flow can be guided to the suction surface of the second blade and the front side and the rear side of the suction surface through the flow guide part on the front edge of the first blade, the air flow (surrounding the suction surface) backflow channel of the second blade is cut off, the stripping area of the suction surface of the second blade is reduced, the energy consumed by the vortex in the stripping area is also reduced, the air flow in the blade channel of the impeller tends to be stable, and the broadband noise of the fan is reduced.

Description

Fan system for cleaning machine and cleaning machine

Technical Field

The utility model relates to a cleaner technical field especially relates to a fan system and cleaner for cleaner.

Background

Cleaning machines such as dust collectors and floor sweeping machines suck mixtures such as dust mixed with water vapor on the ground into the inner cavity of the cleaning machines, and in order to separate the mixtures of particles and water vapor, separation devices are generally adopted for separation at present. A cleaning machine typically comprises a separation module and a motor module (fan system). The separation module is used for separating the sewage and the particles picked up by the sweeping and mopping module from the air, and keeping the sewage and the particles to discharge clean air. The motor module mainly provides a negative pressure source and consists of a motor, a movable blade, a fixed blade and a noise reduction structure. Cleaner products typically require a high speed, high efficiency fan system.

For example, the application number of CN201910369059.0 (the license number of CN 111894876B) discloses a fan and a dust collector with the same, wherein the fan comprises: a hub; the impeller comprises a hub, a plurality of blades and a plurality of blades, wherein the blades are arranged on the peripheral wall of the hub at intervals, each blade is provided with a leading edge and a trailing edge in the flowing direction of airflow, the pressure surfaces of the blades are configured to gradually transit from a concave surface to a convex surface, the leading edge of each blade is provided with a convex part which is convex towards the direction far away from the trailing edge of the blade, the end, connected with the hub, of the leading edge of each blade is a first end, the end, far away from the hub, of the leading edge of each blade is a second end, the connecting line between the first end and the second end is defined as a first connecting line, and the first connecting line is positioned at the downstream of the convex part in the flowing direction of the airflow, so that the inlet pressure of the impeller can be effectively improved, the separation of fluid is relatively late, the separation of the fluid can be realized, the vortex breaking is facilitated, the vibration and the noise generated when the fan runs are reduced, and the aerodynamic performance of the fan is further improved.

However, the high-speed fan has certain disadvantages that the backward fan may generate surge when rotating at high speed, which greatly affects aerodynamic efficiency, and the outlet vortex of the backward fan also affects broadband noise, and meanwhile, the blade has a pressure surface and a suction surface (the pressure surface of the blade is a working surface, which is a windward surface of the blade, and the suction surface of the blade is a non-working surface, which is a leeward surface), and the airflow is often higher than the curvature of the blade in a blade path (a region between two adjacent blades), and the incoming flow rotates under the action of the blade because of flowing to the side surface, a part of the airflow at the front edge surrounds the suction surface of the blade, and the stripping region of the airflow at the suction surface is very large, which causes noise, and if the stripping region is too large, the broadband of the airflow becomes unstable, and as a result, the noise of the fan becomes very large.

Therefore, further improvements are needed in the existing fan systems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem to provide a can effectively reduce blade suction surface and peel off region to the current situation of prior art, and then reduce the fan system for cleaner of wide band noise of fan

The utility model discloses the second technical problem that will solve is the current situation to prior art, provides a cleaning machine who uses above-mentioned fan system.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does:

a blower system for a cleaning machine comprising:

the fan cover is provided with an air inlet;

the impeller is rotationally arranged in the fan cover and comprises a hub and blades which are arranged on the outer peripheral wall of the hub and sequentially arranged along the circumferential direction of the hub, each blade is arc-shaped and is provided with a blade front edge close to the hub and a blade rear edge far away from the hub, and each blade is also provided with a pressure surface and a suction surface;

the blade includes first blade and the second blade of following the circumference of wheel hub staggered arrangement in proper order, the axial width record of wheel hub is followed to first blade is L1, the axial width record of wheel hub is followed to the second blade is L2, wherein, L1 > L2, the blade leading edge of first blade still has certainly the outer peripheral face orientation of wheel hub the water conservancy diversion portion that the suction surface of second blade extends.

In order to enable the flow guiding portion of the first blade to guide the air flow to the middle area of the suction surface of the second blade, thereby further reducing the peeling area of the suction surface of the second blade, the flow guiding portion extends towards the middle of the suction surface of the first blade.

In order to ensure the flow guiding effect of the flow guiding part, the tail end of the flow guiding part of the blade front edge of the first blade is bent to be in a hook shape towards the direction far away from the hub.

In order to adapt the first blade to the hook-shaped guide part as a whole, the curvature radius of the second blade is larger than that of the first blade, and the distance from the blade rear edge of the first blade to the hub center is larger than that from the blade front edge of the second blade to the hub center.

As a refinement, the blades are backward blades.

As an improvement, the thickness of the first blade is gradually reduced from the middle part to the front edge and the rear edge of the first blade, and the rear part of the front edge of the first blade is larger than the thickness of the rear edge of the first blade;

the thickness of the second blade is basically constant from the blade front edge to the blade rear edge.

As an improvement, the blade leading edge of the second blade is connected with the peripheral wall of the hub, and the profile of the blade trailing edge of the second blade is an ellipse;

the suction surface of the first blade is connected with the peripheral wall of the hub, the molded lines of the suction surface and the pressure surface of the first blade are parabolas, the molded line of the blade front edge of the first blade is an ellipse and is smoothly connected with the molded lines of the suction surface and the pressure surface of the first blade, and the molded line of the blade tail edge of the first blade is a straight line and is smoothly connected with the molded lines of the suction surface and the pressure surface of the first blade.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does:

a cleaning machine comprises a separation unit and the fan system, wherein the separation unit is provided with an air outlet, and an air inlet of a fan cover of the fan system is in fluid communication with the air outlet of the separation unit.

Compared with the prior art, the utility model has the advantages that: in the running process of the fan impeller, the air flow can be guided to the suction surface of the second blade and the front side and the rear side of the suction surface through the flow guide part on the front edge of the first blade, the air flow (surrounding the suction surface) backflow channel of the second blade is cut off, the stripping area of the suction surface of the second blade is reduced, the energy consumed by the vortex in the stripping area is also reduced, the air flow in the blade channel of the impeller tends to be stable, and the broadband noise of the fan is reduced.

Drawings

Fig. 1 is a schematic perspective view of a fan system according to an embodiment of the present invention (a motor is not shown);

FIG. 2 is an exploded view of FIG. 1;

fig. 3 is a front view of a fan system according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a cleaning machine according to an embodiment of the present invention;

fig. 5 is a schematic view of a three-dimensional structure of the cleaning machine according to the embodiment of the present invention after the bottom thereof is turned over.

Detailed Description

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

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be construed as limiting, and for example, "upper" and "lower" are not necessarily limited to orientations opposite or consistent with the direction of gravity.

Referring to fig. 1 to 5, the cleaning machine of the present embodiment is a sweeper, and a fan system of the cleaning machine is described.

Referring to fig. 4 and 5, the sweeper generally includes a brushhead assembly 31, a separating unit 32, and a fan system, the brushhead assembly 31 generally being used to sweep the object to be cleaned, the brushhead assembly 31 being located upstream of the separating unit 32. Along the airflow flow path, a separation unit 32 is located between the brushhead assembly 31 and the fan system. The air suction opening of the separation unit 32 is communicated with the outlet of the brush head module, and the air outlet of the separation unit 32 is communicated with the air inlet 11 of the fan system. When the fan system is operated, negative pressure is formed in the brush head assembly 31 and the separation unit 32, so that dust, water and other garbage are sucked into the brush head module through the dust suction port of the brush head assembly 31, then most of the garbage is deposited at the bottom of the storage cavity of the separation unit 32 after being separated by the separation unit 32, and the separated gas is discharged.

The brush head assembly 31 and the separation unit 32 of the sweeper are both of the prior art, and the structure and the working process thereof are not described herein again, for example, the brush head assembly 31 in the brush head module and the cleaner for the cleaner with the application number of CN202011538642.9 (with the application publication number of CN 114652199A) and the separation module disclosed in the chinese utility model patent with the application number of CN202120889463.3 (with the publication number of CN 215191316U) can be adopted.

The important inventive point of this embodiment lies in the structural design of the fan system, which includes the fan guard 10, the impeller 20 disposed in the fan guard 10, and the motor (not shown), and the fan is used to drive the impeller 20 to rotate and generate the negative pressure. The fan guard 10 is generally disc-shaped and has an air inlet 11 at the top thereof.

The impeller 20 includes a hub 21 and a plurality of blades provided on an outer peripheral wall of the hub 21. Wherein the hub 21 is connected with the output shaft of the motor. The blades are sequentially arranged along the circumferential direction of the hub 21, wherein the blades include first blades 22 and second blades 23 which are sequentially staggered along the circumferential direction of the hub 21, that is, one second blade 23 is arranged between any two adjacent first blades 22, and one first blade 22 is arranged between any two adjacent second blades 23, wherein the first blades 22 and the second blades 23 have different structures, which is specifically described below.

Referring to fig. 3, each blade (including the first blade 22 and the second blade 23) has an arc shape, wherein the first blade 22 has a leading edge A1 adjacent to the hub 21 and a trailing edge A2 away from the hub 21, and the first blade 22 further has a pressure surface A3 and a suction surface A4. The second blade 23 has a leading edge B1 adjacent to the hub 21 and a trailing edge B2 remote from the hub 21, the second blade 23 also having a pressure side B3 and a suction side B4. In the present embodiment, the first blade 22 and the second blade 23 are both backward blades.

Referring to fig. 2, the width of the first blade 22 in the axial direction O of the hub 21 of the present embodiment is denoted by L1, and the width of the second blade 23 in the axial direction of the hub 21 is denoted by L2, where L1 > L2. The radius of curvature of the second blade 23 is larger than the radius of curvature of the first blade 22, and the distance O1 of the trailing edge of the first blade 22 from the center of the hub 21 is larger than the distance O2 of the leading edge of the second blade 23 from the center of the hub 21, see fig. 3.

The profiles of the suction surface and the pressure surface of the first blade 22 are both parabolas, the profile of the blade leading edge of the first blade 22 is an ellipse and is smoothly connected with the profiles of the suction surface and the pressure surface of the first blade 22, and the profile of the blade trailing edge of the first blade 22 is a straight line and is smoothly connected with the profiles of the suction surface and the pressure surface of the first blade 22. The leading edge of the second blade 23 is connected to the outer peripheral wall of the hub 21, and the trailing edge of the second blade 23 has an elliptical profile. The thickness of the first blade 22 gradually decreases from the middle portion to the front edge and the rear edge of the first blade 22, and the rear portion of the front edge of the first blade 22 is greater than the thickness of the rear edge of the blade. The thickness of the second blade 23 is substantially constant from its leading edge to its trailing edge.

The suction surface (the portion adjacent to the blade front edge A1) of the first blade 22 is connected to the outer circumferential wall of the hub 21, and the blade front edge of the first blade 22 is formed with a flow guide portion 221 extending from the outer circumferential surface of the hub 21 toward the middle region of the suction surface of the second blade 23, and the tip of the flow guide portion 221 of the blade front edge of the first blade 22 is bent in a hook shape toward a direction away from the hub 21, so that, during operation of the fan, the hook-shaped flow guide portion 221 can guide the airflow to the suction surface of the second blade 23 and to the front and rear sides of the suction surface, the airflow return channel (circulating to the suction surface) of the second blade 23 is cut off, the peeling region of the suction surface of the second blade 23 is reduced, and the energy consumed by the vortex inside the peeling region is also reduced, so that the airflow in the blade channel of the impeller 20 tends to be smooth, and the broadband noise of the fan is reduced.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter, referred to as a first portion and a second portion) in a unified manner, i.e., a fluid (gas, liquid or a mixture thereof) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide member, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims

1. A blower system for a cleaning machine comprising:

a fan cover (10) having an air inlet (11);

the impeller (20) is rotationally arranged in the fan cover (10) and comprises a hub (21) and blades which are arranged on the outer peripheral wall of the hub (21) and sequentially arranged along the circumferential direction of the hub (21), each blade is arc-shaped and is provided with a blade front edge close to the hub (21) and a blade rear edge far away from the hub (21), and each blade is also provided with a pressure surface and a suction surface;

the method is characterized in that: the blade includes first blade (22) and second blade (23) along the circumference of wheel hub (21) staggered arrangement in proper order, L1 is write along the axial width of wheel hub (21) in first blade (22), L2 is write along the axial width of wheel hub (21) in second blade (23), wherein, L1 > L2, the blade leading edge of first blade (22) still has certainly the outer peripheral face orientation of wheel hub (21) guide portion (221) that the suction surface of second blade (23) extended.

2. The fan system for a cleaning machine of claim 1, wherein: the flow guide portion (221) extends toward the middle of the suction surface of the first blade (22).

3. The fan system for a cleaning machine of claim 2, wherein: the tip of the flow guide part (221) of the blade leading edge of the first blade (22) is curved in a hook shape in a direction away from the hub (21).

4. The fan system for a cleaning machine of claim 1, wherein: the curvature radius of the second blade (23) is larger than that of the first blade (22), and the distance from the blade rear edge of the first blade (22) to the center of the hub (21) is larger than that from the blade front edge of the second blade (23) to the center of the hub (21).

5. The fan system for a cleaning machine of claim 1, wherein: the blades are backward blades.

6. The fan system for a cleaning machine according to any one of claims 1 to 5, wherein: the thickness of the first blade (22) is gradually reduced from the middle part to the front edge and the rear edge of the first blade (22), and the rear part of the front edge of the first blade (22) is larger than the thickness of the rear edge of the first blade;

the thickness of the second blade (23) is substantially constant from the leading edge to the trailing edge thereof.

7. The fan system for a cleaning machine of claim 6, wherein: the front edge of the second blade (23) is connected with the outer peripheral wall of the hub (21), and the molded line of the rear edge of the second blade (23) is an ellipse;

the suction surface of the first blade (22) is connected with the peripheral wall of the hub (21), the profiles of the suction surface and the pressure surface of the first blade (22) are parabolas, the profile of the blade front edge of the first blade (22) is an ellipse and is smoothly connected with the profiles of the suction surface and the pressure surface of the first blade (22), and the profile of the blade tail edge of the first blade (22) is a straight line and is smoothly connected with the profiles of the suction surface and the pressure surface of the first blade (22).

8. A cleaning machine comprising a separating unit (32), the separating unit (32) having an air outlet, characterized in that: further comprising a fan system according to any of claims 1-7, an air inlet (11) of a fan guard (10) of the fan system being in fluid communication with an air outlet of the separation unit (32).