CN218606462U - Fan system for cleaning machine and cleaning machine - Google Patents

Abstract

The utility model relates to a fan system and cleaning machine for cleaning machine, including the fan casing, locate the movable vane wheel in the fan casing and be used for driving the rotatory motor of movable vane wheel, the fan casing includes the air inlet cover and goes out the fan casing, it has the wind-guiding wind channel of volute form to go out the fan casing, the export in wind-guiding wind channel is located the periphery side that goes out the fan casing, and constituted the air outlet of fan casing, the wind-guiding wind channel has central zone relative with the movable vane wheel on the lateral wall face towards the air intake and peripheral region between the periphery border from this central zone to neighbouring wind-guiding wind channel, central zone is formed with the orientation with peripheral region juncture movable vane wheel place one side bellied cyclic annular convex part. The design of the change of the side wall surface of the air guide duct delays the separation of air flow, destroys the clockwise vortex at the top of the volute and the anticlockwise vortex formed by the upturning of the air flow at the bottom, reduces the loss of turbulence intensity and turbulence energy, and further reduces the friction resistance of the inner wall surface of the air guide duct.

Description

Fan system for cleaning machine and cleaning machine

Technical Field

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

Background

Ground cleaning machine is like dust catcher, sweeper, inhales its inner chamber with mixture such as the dust that mixes steam on the ground, in order to realize separating the mixture of particulate matter, steam, adopts separator to separate at present usually. 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.

The invention discloses a separation module for a cleaning machine and the cleaning machine with the separation module, as disclosed in the Chinese patent application with the application number of CN202011538539.4 (with the application publication number of CN 114652214A), wherein the separation module comprises a shell, a cavity is arranged in the shell, and the cavity is provided with an air inlet and an air outlet which is communicated with the air inlet in a fluid manner; and the air inlet channel is positioned in the containing cavity and is arranged at the air inlet. The housing has a plurality of baffles for forming a circuitous flow path therein for separating the multiphase flow. The mixed air flow such as air, dust and granule that get into through the air intake is reunited in the wind-guiding passageway, and when the baffle, the mixed air flow collides with the stop part, has slowed down the air current velocity of flow, and at this moment, the granule that the proportion is big takes place to subside, has slowed down the air current velocity of flow to realized the separation to the big granule of mixed air flow, prevented follow-up jam and filtered the piece, and the separation effect is better.

However, the cleaning machine has certain disadvantages, and the separation module adopts a circuitous air duct structure, so that although solid-liquid mixture can be well separated, the cost is brought about by more turbulence generated in the casing of the fan system, which greatly affects the inlet smoothness of the fan system, thereby causing air flow in the fan and turbulence thereof, and increasing noise.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem is to prior art's current situation, provides one kind and can effectively reduce the torrent of air current in the fan system, and then realizes falling the fan system for cleaner of the purpose of making an uproar.

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

The utility model provides a technical scheme that above-mentioned first technical problem adopted is: a fan system for a cleaning machine is arranged at the downstream of a separation unit of the cleaning machine along an airflow flow path of the cleaning machine and comprises a fan cover, a movable impeller arranged in the fan cover and a motor used for driving the movable impeller to rotate, wherein the fan cover is provided with an air inlet used for being in fluid communication with the separation unit of the cleaning machine and an air outlet used for allowing airflow to flow out, and the air inlet end of the movable impeller is opposite to the air inlet of the fan cover;

the fan cover comprises an air inlet cover and an air outlet cover, an air inlet is formed in the middle of the air inlet cover, an installation opening is formed in one side, opposite to the air inlet, of the air inlet cover, the air outlet cover is connected to the installation opening of the air inlet cover, the air outlet cover is provided with a volute-shaped air guide duct, an outlet of the air guide duct is located on the outer peripheral side of the air outlet cover, the air guide duct faces towards the side wall surface of the air inlet, the central area, opposite to the movable impeller, of the air guide duct and the peripheral area between the peripheral edge of the air guide duct and the peripheral edge of the adjacent air guide duct from the central area, and the central area and the peripheral area are connected to form an annular convex portion facing the movable impeller on one side.

In order to facilitate the smooth outward discharge of the air flow of the air guide duct through the air outlet, the distance between the central area of the air guide duct and the plane where the air inlet is located is denoted as L1, and the distance between the peripheral area of the air guide duct and the plane where the air inlet is located is denoted as L2, wherein L2 is greater than L1.

By the structural design, the depression depth of the central area is relatively small, so that fluid at the outlet of the impeller can be well buffered, and can be converted into pressure energy more efficiently; the depth of the recess of the peripheral area is relatively large, so that the pressure pulsation frequency is improved, the resonance frequency of the motor can be avoided, and the vibration is reduced.

The convex height of the annular convex part needs to be reasonably designed, if the convex height is too small, the rectifying and noise reducing effect is not obvious, and if the convex height is too large, the smooth exhaust of airflow is influenced, therefore, the axial height of the movable impeller is marked as H, the central area forms a first concave area relative to the annular convex part, the concave depth of the first concave area is marked as H1, the peripheral area forms a second concave area relative to the annular convex part, and the concave depth of the second concave area is marked as H2, wherein H1/H is more than or equal to 1/15 and less than or equal to 1/10, H1/H is more than or equal to 1/10 and less than or equal to 1/4. The above "axial height of the impeller" is understood to be the distance from the front disk to the rear disk of the impeller.

In order to smoothly guide airflow thrown to the periphery of the movable impeller to the wind channel along the axial direction in the operation process of the movable impeller, the wind channel guiding device further comprises a static blade assembly which is arranged in the fan cover and is positioned at the downstream of the movable impeller, the static blade assembly comprises a base and static blades, the base comprises an annular wall which is positioned at the inner side of the fan cover and is arranged at intervals with the fan cover, the static blades are distributed at intervals along the circumferential direction of the annular wall, and a static blade wind channel which is spirally arranged along the axial direction of the movable impeller is defined between every two adjacent static blades and the annular wall as well as between every two adjacent static blades and the fan cover.

As an improvement, the outlet of the stationary blade air duct is opposite to the annular convex part of the air guide duct. The annular convex part is arranged at the position opposite to the outlet of the stationary blade air duct, so that the pulsation frequency of the airflow and the motor resonance frequency section 80-260Hz can be avoided, and the purpose of further reducing the noise is achieved.

The utility model provides a technical scheme that above-mentioned second technical problem adopted is: a cleaning machine comprising a separation unit and a fan system located downstream of the separation unit along an airflow flow path, the fan system employing the fan system described above.

In order to ensure the separation effect of the separation unit, the separation unit comprises:

a housing defining a separation chamber therein, the separation chamber having an air intake and an air exhaust in fluid communication with the air intake;

the air inlet channel is positioned in the separation chamber and is arranged at the air inlet;

and the baffle assembly is positioned at the downstream of the air inlet channel along the fluid flow path and comprises at least two baffles, and each baffle is at least partially positioned on the fluid flow paths of the air inlet and the air outlet and defines a bypass-arranged branch channel with the inner wall of the separation chamber.

Above-mentioned baffle subassembly's setting for the granule that proportion is big takes place to subside, has slowed down the air current flow velocity, thereby has realized the separation to the big granule of mist, prevents that follow-up jam from filtering the piece, and the better separation effect

Compared with the prior art, the utility model has the advantages that: the annular convex part is arranged on the side wall surface of the air guide duct of the fan cover, the side wall surface of the air guide duct is divided into a central depressed area positioned on the inner side and a peripheral depressed area positioned on the outer side, the change design of the side wall surface of the air guide duct is realized, the turbulent kinetic energy consumed nearby the area is obviously reduced, the Reynolds stress can be correspondingly reduced, the separation of air flow is delayed, the clockwise vortex at the top of the volute and the anticlockwise vortex formed by upturning of the air flow at the bottom are destroyed, the turbulence intensity and the turbulence energy loss are reduced, and further the friction resistance of the inner wall surface of the air guide duct is reduced. Particularly, the change design of the inner and outer sunken areas of the annular convex part on the side wall surface of the air guide duct has obvious influence on the pressure pulsation level, and is beneficial to reducing the pressure pulsation level in the fan cover, so that the fan cover has a positive effect on reducing vibration and aerodynamic noise caused by pressure pulsation.

Drawings

Fig. 1 is a schematic perspective view of a cleaning machine according to an embodiment of the present invention (only a brush head assembly, a separation unit, and a fan system are shown);

FIG. 2 is a schematic perspective view of the structure of FIG. 1 from another angle;

FIG. 3 is a top view of FIG. 1;

FIG. 4 isbase:Sub>A cross-sectional view taken at A-A of FIG. 3;

fig. 5 is a top view of a fan system according to an embodiment of the present invention;

FIG. 6 isbase:Sub>A cross-sectional view taken at A-A of FIG. 5;

fig. 7 is an exploded view of the blower system according to the embodiment of the present invention without an air outlet cover.

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 7, the cleaning machine of the present embodiment is a sweeper, and a fan system thereof is described.

The sweeper generally includes a brushhead assembly 40, a separation unit 30 and a fan system 1. The brush head assembly 40 is generally used to sweep the object to be cleaned, and the brush head assembly 40 is located upstream of the separation unit 30. Along the airflow flow path, the separation unit 30 is located between the brushhead assembly 40 and the blower system. The air suction opening 32 of the separation unit 30 is communicated with the outlet of the brush head module, and the air outlet 33 of the separation unit 30 is communicated with the air inlet 131 of the fan system. When the fan system is operated, negative pressure is formed in the brush head assembly 40 and the separation unit 30, so that dust, water and other garbage are sucked into the brush head module through the dust suction port of the brush head assembly 40, then most of the garbage is deposited at the bottom of the storage cavity of the separation unit 30 after being separated by the separation unit 30, and the separated gas is discharged.

Referring to fig. 3 and 4, which show the internal structure of the separation module, the separation unit 30 includes a housing 31 and a baffle assembly 34. The interior of the housing 31 defines a separation chamber 311, the separation chamber 311 is provided with an air suction opening 32 at a position corresponding to the outlet of the brush head assembly 40, and an air discharge opening 33 at a position corresponding to the air inlet 131 of the blower system. The separation chamber 311 is further provided with an air intake channel 312 inside adjacent to the air intake 131, and the air intake channel 312 is specifically defined by a first wall protruding downward from the top of the separation chamber 311 and a second wall below the first wall and protruding toward the inside of the separation chamber 311 from the lower edge of the air intake 32. Along the fluid flow path, the baffle assembly 34 is located downstream of the air intake channel 312, and the baffle assembly 34 specifically includes a first baffle plate and a second baffle plate, the first baffle plate being a C-shaped bent plate with an opening facing the air intake channel 312. The first baffle plate and the top wall and the bottom wall of the separation chamber 311 are provided with a space for air flow to pass through. The second baffle is located the low reaches of first baffle, locates the lower border position of separation cavity 311's air exit 33, and the one end that the second baffle is close to first baffle still tilt up to form the interval space that supplies the air current to enter into air exit 33 with the roof of separation cavity 311. The internal space of the separation chamber 311 is limited by the first baffle and the second baffle to form a plurality of bypass channels 35, so that particles with high specific gravity can be settled, the flow speed of the air flow is reduced, the separation of large particles of mixed air flow is realized, the subsequent blockage of the filter element is prevented, and the separation effect is good. The structural design and working process of the separation unit 30 can be seen in the prior patent application of the present applicant: a separating module for a cleaning machine and a cleaning machine with the separating module are disclosed in application No. 202011538539.4.

The fan system 1 includes a fan cover 10, a movable impeller 11 provided in the fan cover 10, and a motor 12 for driving the movable impeller 11 to rotate. The fan housing 10 comprises an air inlet housing 13 and an air outlet housing 14, wherein the air inlet housing 13 and the air outlet housing 14 are buckled with each other to jointly define a mounting cavity for placing the movable impeller 11, the motor 12 and the stationary impeller assembly.

The air inlet cover 13 is a cover body structure with a circular cross section, an air inlet 131 is formed in a central area 142 of the air inlet cover, an installation opening 133 is formed on one side opposite to the air inlet 131, the aperture of the installation opening 133 is larger than that of the air inlet 131, and specifically, the aperture of the air inlet 131 is matched with the outer diameter of the impeller.

The air outlet housing 14 is connected to the mounting opening 133 of the air inlet housing 13. The air-out cover 14 has a volute-shaped air guiding duct 140, wherein an outlet of the air guiding duct 140 is located on an outer circumferential side of the air-out cover 14 and forms an air outlet 132 of the fan guard 10. The outlet housing 14 of this embodiment resembles half of a volute of a conventional centrifugal fan (with no opening in its central region 142). The outer diameter of the air outlet cover 14 is larger than that of the air inlet cover 13, so that the air outlet cover 14 has an annular wall 23 extending inwards from the outer periphery of the air inlet cover 13 at the side correspondingly connected with the air inlet cover 13, and the annular wall 23 is provided with an opening basically consistent with the inner diameter of the mounting opening 133 of the air inlet cover 13.

Referring to fig. 7, the motor 12 is disposed on a side of the movable impeller 11 close to the air-out cover 14, and is specifically fixed on the stationary impeller assembly located downstream of the movable impeller 11. The movable impeller 11 is used for radially throwing out the airflow entering through the air inlet 131, and the stationary blade assembly 20 smoothly guides the airflow thrown off from the periphery of the movable impeller 11 in the operation process to the air guiding duct 140 along the axial direction.

The vane assembly 20 includes a base 21 and vanes 22. The base 21 is generally disc-shaped and includes an annular wall 23 located on the inside of the fan guard 10 and spaced from the fan guard 10. The stationary blades 22 are spaced apart from each other in the circumferential direction of the annular wall 23, and two adjacent stationary blades 22 define a stationary blade duct 24 that is arranged spirally in the axial direction of the movable impeller 11 together with the annular wall 23 and the fan guard 10. The working process of the vane assembly 20 of the present embodiment is the prior art, and reference may be made to the prior patent of the present applicant: a centrifugal fan, having application number 202121739432.6.

An important point of the present embodiment is that: the air guiding duct 140 has a central area 142 facing the movable impeller 11 on a side wall surface facing the air inlet 131, and a peripheral area 143 from the central area 142 to an outer peripheral edge of the adjacent air guiding duct 140, wherein an annular protrusion 141 protruding toward a side where the movable impeller 11 is located is formed at a boundary between the central area 142 and the peripheral area 143. Specifically, as can be seen from fig. 6, the outlet of the stationary blade duct 24 is opposed to the annular convex portion 141 of the wind guide duct 140.

Referring to fig. 6, the protrusion height of the annular protrusion 141 needs to be designed reasonably, if the protrusion height is too small, the rectifying and noise reducing effect is not obvious, and if the protrusion height is too large, the smooth discharge of the airflow is affected, so in this embodiment, the distance between the central area 142 of the air guiding duct 140 of the air outlet cover 14 and the plane where the air inlet 131 is located is denoted as L1, and the distance between the peripheral area 143 of the air guiding duct 140 and the plane where the air inlet 131 is located is denoted as L2, where L2 > L1. More specifically, the axial height of the movable impeller 11 (which can be understood as the distance from the front disk to the rear disk of the movable impeller 11) is denoted by H, the central region 142 forms a first recessed region relative to the annular protrusion 141, the recessed depth of the first recessed region is denoted by H1, the peripheral region 143 forms a second recessed region relative to the annular protrusion 141, and the recessed depth of the second recessed region is denoted by H2, wherein H1/H is greater than or equal to 1/15 and less than or equal to 1/10, and H1/H is greater than or equal to 1/10 and less than or equal to 1/4.

The annular convex portion 141 arranged on the side wall surface of the air guide duct 140 of the fan cover 10 divides the side wall surface of the air guide duct 140 into the central depressed area positioned on the inner side and the peripheral depressed area positioned on the outer side, and by the changing design of the side wall surface of the air guide duct 140, the turbulent kinetic energy consumed near the area is obviously reduced, the reynolds stress is correspondingly reduced, the separation of air flow is delayed, the clockwise vortex at the top of the volute and the counterclockwise vortex formed by the upward turning of the air flow at the bottom are destroyed, the turbulence intensity and the loss of the turbulence kinetic energy are reduced, and further the friction resistance of the inner wall surface of the air guide duct 140 is reduced. In particular, the variable design of the inner and outer concave regions of the annular convex portion on the side wall surface of the air guide duct 140 has a significant effect on the pressure pulsation level, which is beneficial to reducing the pressure pulsation level in the fan guard 10, and has a positive effect on reducing vibration and aerodynamic noise caused by pressure pulsation.

Claims (7)

1. A fan system for a cleaning machine is arranged at the downstream of a separation unit (30) of the cleaning machine along an airflow flow path of the cleaning machine, and comprises a fan cover (10), a movable impeller (11) arranged in the fan cover (10) and a motor (12) for driving the movable impeller (11) to rotate, wherein the fan cover (10) is provided with an air inlet (131) used for being in fluid communication with the separation unit (30) of the cleaning machine and an air outlet (132) used for flowing out air flow, and the air inlet end of the movable impeller (11) is opposite to the air inlet (131) of the fan cover (10);

the method is characterized in that: the fan cover (10) comprises an air inlet cover (13) and an air outlet cover (14), wherein an air inlet (131) is formed in the middle of the air inlet cover (13), an installation opening (133) is formed in one side, opposite to the air inlet (131), of the air inlet cover (13), the air outlet cover (14) is connected to the installation opening (133) of the air inlet cover (13), the air outlet cover (14) is provided with a volute-shaped air guide duct (140), an outlet of the air guide duct (140) is located on the outer peripheral side of the air outlet cover (14) and forms an air outlet (132) of the fan cover (10), the air guide duct (140) is provided with a central area (142) opposite to the movable impeller (11) and a peripheral area (143) between the central area (142) and the outer peripheral edge of the adjacent air guide duct (140) on the side wall surface facing the air inlet (131), and a junction (141) where the movable impeller (11) protrudes is formed at the central area (142) and the peripheral area (143).

2. The fan system for a cleaning machine of claim 1, wherein: the distance between the central area (142) of the air guide duct (140) and the plane where the air inlet (131) is located is marked as L1, the distance between the peripheral area (143) of the air guide duct (140) and the plane where the air inlet (131) is located is marked as L2, and L2 is larger than L1.

3. The fan system for a cleaning machine of claim 2, wherein: the axial height of the movable impeller (11) is marked as H, the central area (142) forms a first concave area relative to the annular convex part (141), the concave depth of the first concave area is marked as H1, the peripheral area (143) forms a second concave area relative to the annular convex part (141), the concave depth of the second concave area is marked as H2, H1/H is more than or equal to 1/15 and less than or equal to 1/10, and H1/H is more than or equal to 1/10 and less than or equal to 1/4.

4. The blower system for a cleaning machine according to any one of claims 1 to 3, characterized by further comprising:

the stator blade assembly (20) is arranged in the fan cover (10) and located at the downstream of the movable impeller (11), the stator blade assembly (20) comprises a base (21) and stator blades (22), the base (21) comprises an annular wall (23) located on the inner side of the fan cover (10) and spaced from the fan cover (10), the stator blades (22) are distributed at intervals in the circumferential direction of the annular wall (23), and stator blade air channels (24) which are spirally arranged in the axial direction of the movable impeller (11) are defined between the adjacent two stator blades (22) and the annular wall (23) and the fan cover (10).

5. The fan system for a cleaning machine of claim 4, wherein: the outlet of the stationary blade duct (24) faces the annular projection (141) of the air guide duct (140).

6. A cleaning machine comprising a separation unit (30) and a fan system located downstream of the separation unit (30) along an airflow flow path, characterized in that: the fan system employs a fan system as claimed in any one of claims 1 to 5.

7. The cleaning machine of claim 6, wherein: the separation unit (30) comprises:

a housing (31) defining a separation chamber (311) therein, the separation chamber (311) having an air suction opening (32) and an air discharge opening (33) in fluid communication with the air suction opening (32);

the air inlet channel (312) is positioned in the separation chamber (311) and is arranged at the air inlet (131);

the baffle assembly (34) is positioned downstream of the air inlet channel (312) along a fluid flow path, the baffle assembly (34) comprises at least two baffles, and each baffle is at least partially positioned on the fluid flow path of the air inlet (131) and the air outlet (33) and defines a bypass branch channel (35) with the inner wall of the separation chamber (311).

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