A cleaning method for a cleaning machine

Abstract

The present invention relates to a cleaning method of a cleaning machine, the cleaning machine comprises a box, a bottom spray arm, a top spray arm and a pump, the bottom spray arm is arranged in the box and arranged near the bottom of the box, the top spray arm is arranged in the box and arranged near the middle and upper part, the pump is arranged in the box and is used to pump water for the bottom spray arm and the top spray arm. When the driving member drives the upper impeller and the lower impeller to rotate forward, the first water inlet, the second accommodating chamber, the bottom spray arm, and the bottom of the inner cavity of the box together constitute an independent bottom spray water path, when the driving member drives the upper impeller and the lower impeller to reverse, the first water inlet, the third accommodating chamber, the water outlet, the top spray arm, and the bottom of the inner cavity of the box together constitute an independent top spray water path, the bottom spray and the top spray are operated one by one and the flow direction of the fluid is opposite, which is conducive to saving energy and meeting more needs of consumers; the bottom spray and the spray water path are alternately carried out, which is conducive to eliminating cleaning dead corners and improving the cleaning effect.

Description

Technical Field

[0001] The invention relates to a cleaning method of a cleaning machine. Background Art

[0002] For desktop and cabinet dishwashers, since the washing space is large, in order to achieve a better washing effect, they are generally designed with three spray arms: top, middle and lower. When working, the washing pump transports water to the top, middle and lower spray arms through pipes. The water is sprayed out from the top, middle and lower spray arms and rinses the dishes before falling back into the water cup at the bottom of the dishwasher. The washing pump transports the fallen water to the top, middle and lower spray arms again to complete a cycle.

[0003] The applicant's prior application 202011635878.4 "A dual pump system and a cleaning machine with a dual pump system" discloses a dishwasher structure, in which a top spray structure is provided at the top and a bottom spray structure is provided at the bottom of the cleaning machine. A partition can be provided in the middle of the washing chamber to separate it into relatively independent upper and lower chambers. The top spray mechanism is located in the upper chamber, and the bottom spray structure is located in the lower chamber. A dual pump system for pumping water for the top spray structure and the bottom spray structure is provided at the bottom of the cleaning machine.

[0004] In the above scheme, the dual-pump system can pump water only for the bottom spray structure, or can pump water for both the bottom spray structure and the top spray structure at the same time. Accordingly, when washing dishes, only the lower cavity can be used for washing, or both the upper and lower cavities can be used for washing. However, based on the use of an open dual-pump system, the above structure cannot achieve washing with the upper cavity alone, and the volume of the upper cavity can generally be smaller than that of the lower cavity. When the amount of dishes to be washed is small, it is impossible to use only the smaller upper cavity to wash the dishes, which causes energy waste to a certain extent and cannot meet consumer demand. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a cleaning method for a cleaning machine in response to the current status of the prior art, which realizes independent water pumping for top spray and bottom spray by switching the flow direction of the fluid between downstream and upstream, thereby saving energy and meeting consumer needs.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning method for improving the cleaning effect by switching the flow direction of the fluid between downstream and upstream so as to achieve alternating top spraying and bottom spraying.

[0007] The technical solution adopted by the present invention to solve at least one of the above technical problems is:

[0008] A cleaning method for a cleaning machine, the cleaning machine comprising a box, a bottom spray arm, a top spray arm and a pump, the bottom spray arm being arranged in the box and close to the bottom of the box, the top spray arm being arranged in the box and close to the middle and upper part, the pump being arranged in the box and used for pumping water for the bottom spray arm and the top spray arm; when the bottom spray arm operates independently, the power output shaft of the pump rotates forward to pump water from the bottom of the box into the bottom spray arm, the bottom spray arm sprays upward to clean tableware in the box; when the top spray arm operates independently, the power output shaft of the pump rotates reversely to pump water from the bottom of the box into the top spray arm, the top spray arm sprays upward or downward to clean tableware in the box.

[0009] Preferably, the power output shaft of the pump rotates forward and reverse alternately, so that the water at the bottom of the tank is switched between downstream and upstream in the pump, and alternate bottom spraying and top spraying are performed.

[0010] The pump of the present invention comprises:

[0011] An upper impeller has a first shaft located at the center and first blades distributed at intervals in the circumferential direction on the circumference of the first shaft and extending in the axial direction;

[0012] A lower impeller having a second shaft located at the center and second blades spaced circumferentially around the second shaft;

[0013] An upper shell having a first accommodating cavity for mounting the upper portion of the upper impeller, a spray hole in fluid communication with the first accommodating cavity is formed on the top wall and / or side wall of the upper shell, and the upper shell constitutes the bottom spray arm;

[0014] A lower shell is arranged below the upper shell, the upper part of the lower shell forms a second accommodating chamber for installing the lower part of the upper impeller, the lower part of the lower shell forms a third accommodating chamber for installing the lower impeller, the second accommodating chamber is connected from top to bottom, and the upper port is connected to the first accommodating chamber, and the lower port is connected to the third accommodating chamber, the side wall of the upper part of the lower shell is provided with a first water inlet for supplying water into the second accommodating chamber, the side wall of the lower part of the lower shell is provided with a water outlet for supplying water from the third accommodating chamber, and the water outlet is connected to the top spray arm; and

[0015] The driving member is arranged at the bottom of the box body and the power output shaft is connected with the lower impeller and the upper impeller, and is used to drive the lower impeller and the upper impeller to rotate forward and / or reversely.

[0016] When the driving member drives the upper impeller and the lower impeller to rotate forward, the first water inlet, the second accommodating chamber, the bottom spray arm, and the bottom of the inner cavity of the box body together independently constitute a bottom spray water path; when the driving member drives the upper impeller and the lower impeller to rotate reversely, the first water inlet, the third accommodating chamber, the water outlet, the top spray arm, and the bottom of the inner cavity of the box body together constitute an independent top spray water path.

[0017] Preferably, the lower shell is connected from top to bottom and has a top opening at the top and a bottom opening at the bottom. A second water inlet is provided on the bottom wall of the bottom spray arm, and the top opening is connected to the second water inlet. The lower end of the lower shell abuts against the bottom wall of the box body to close the bottom opening and the bottom of the third accommodating chamber. This structure facilitates the production and manufacture of the lower shell. During installation, the outer edge of the bottom of the lower shell can be fixed to the bottom wall of the box body by screws, which saves material at the bottom of the lower shell and avoids the accumulation of fine residues.

[0018] Preferably, the inner diameter of the lower part of the lower shell is larger than the inner diameter of the upper part so as to form a step surface at the joint, and the first water inlet is opened on the side wall of the upper part of the lower shell and the lower edge is located on the step surface. The first water inlet is arranged on the step surface, and the water diversion effect of the step surface on water is utilized to facilitate water inlet.

[0019] In order to facilitate production and manufacturing, the first water inlet is an annular opening extending along the circumference of the lower shell, and the step surface is provided with supporting ribs extending longitudinally and used to support the upper part of the lower shell on the step surface.

[0020] Preferably, the outer side wall of the support rib forms a diversion slope that gradually tilts outward from top to bottom along the radial direction of the lower shell body. This structure is conducive to guiding the water flow of the first water inlet and avoiding turbulent impact of the water flow and affecting the water inlet effect.

[0021] Preferably, a water supply pipe for connecting the third accommodating chamber with the top spray arm is provided at the bottom of the box, and a flow guide pipe for tangentially connecting the water outlet with the lower end of the water supply pipe is provided beside the lower shell. This structure is conducive to reducing water flow energy loss and maintaining a high water pressure and flushing capacity of the top spray.

[0022] Preferably, the first shaft sleeve of the upper impeller is disposed on the outer periphery of the power output shaft of the driving member, the upper portion of the upper impeller is a centrifugal structure located in the first accommodating chamber, and the lower portion is an axial flow structure located in the second accommodating chamber. The axial flow structure is used to guide water along the axial direction, and the centrifugal structure is used to disperse the water flow along the radial direction.

[0023] Preferably, the second shaft sleeve of the lower impeller is arranged on the outer periphery of the power output shaft of the driving member, and along the water flow direction, the outer periphery of the second shaft is provided with an upper cover plate and a lower cover plate arranged in an axial interval, and the second blades are arranged between the upper cover plate and the lower cover plate, and the central part of the upper cover plate is provided with a water inlet arranged corresponding to the lower port of the second accommodating chamber, and the upper cover plate, the lower cover plate and the two adjacent second blades jointly enclose a water delivery port. The third accommodating chamber of the present invention constitutes a relatively closed volute, and the lower impeller is used to provide water-drawing power for the relatively closed volute, which is conducive to improving the head and water flow of the top spray water.

[0024] Preferably, the inner end surface of the second blade forms a first guide arc surface that gradually extends from top to bottom toward the second axis, the upper end of the first guide arc surface is tangentially connected to the inner edge of the water inlet, and the lower end of the first guide arc surface is arranged close to the lower end of the second axis. The lower end of the second axis forms a second guide arc surface with a smooth transition at the junction with the upper wall of the lower cover plate. This structure is conducive to guiding the water flow and reducing energy loss.

[0025] Compared with the prior art, the advantages of the present invention are: the bottom spray arm, the lower shell and the upper impeller and the lower impeller of the present invention cooperate to form a water pump structure with double outlets. When the driving member drives the upper impeller and the lower impeller to rotate forward, the first water inlet, the second accommodating chamber, the bottom spray arm, and the bottom of the inner cavity of the box together constitute an independent bottom spray water path. When the driving member drives the upper impeller and the lower impeller to rotate reversely, the first water inlet, the third accommodating chamber, the water outlet, the top spray arm, and the bottom of the inner cavity of the box together constitute an independent top spray water path. The bottom spray and the top spray are operated alternately and the flow directions of the fluids are opposite, which is beneficial to saving energy and meeting more needs of consumers. The bottom spray and the spray water path are carried out alternately, which is beneficial to eliminating cleaning dead corners and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a partial structural diagram of an embodiment of the present invention (part of the box is hidden);

[0027] Figure 2 for Figure 1 A cross-sectional view of

[0028] Figure 3 for Figure 2 A partial enlarged view of

[0029] Figure 4 It is a schematic diagram of the structure of the lower housing in an embodiment of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the lower housing at another angle in an embodiment of the present invention;

[0031] Figure 6Schematic diagram of the structure of the lower impeller in an embodiment of the present invention;

[0032] Figure 7 for Figure 6 sectional view of . DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings.

[0034] like Figures 1 to 7 As shown, the cleaning machine of this embodiment includes a box body 6, a bottom spray arm, a top spray arm 5 and a pump A. The bottom spray arm is arranged in the box body 6 and arranged near the bottom of the box body 6. The top spray arm 5 is arranged in the box body 6 and arranged near the middle and upper part. When the top spray arm 5 is located at the top of the box body 6, it can spray downwards. When the top spray arm 5 is located in the middle of the box body 6, it can spray upwards. The pump is arranged in the box body 2 and is used to pump water for the bottom spray arm and the top spray arm 5.

[0035] In this embodiment, the pump comprises an upper impeller 1, a lower impeller 2, an upper shell 3, a lower shell 4 and a driving member 7. The upper impeller 1 has a first shaft 11 located at the center and first blades 12 distributed circumferentially and extending axially on the circumference of the first shaft 11. The lower impeller 2 has a second shaft 21 located at the center and second blades 22 distributed circumferentially and spaced on the outer periphery of the second shaft 21. The upper shell 3 has a first accommodating chamber 31 for mounting the upper part of the upper impeller 1, and a spray hole 32 is opened on the top wall of the upper shell 3 and is in fluid communication with the first accommodating chamber 31, and the upper shell 3 constitutes the above-mentioned bottom spray arm. The lower shell 4 is arranged below the upper shell 1. The upper part of the lower shell 4 forms a second accommodating chamber 41 for installing the lower part of the upper impeller 1. The lower part of the lower shell 4 forms a third accommodating chamber 42 for installing the lower impeller 2. The second accommodating chamber 41 is connected from top to bottom, and the upper port is connected to the first accommodating chamber 31, and the lower port is connected to the third accommodating chamber 42. The side wall of the upper part of the lower shell 4 is provided with a first water inlet 411 for supplying water into the second accommodating chamber 41. The side wall of the lower part of the lower shell 4 is provided with a water outlet 421 for supplying water from the third accommodating chamber 42. The water outlet 421 is connected to the top spray arm 5. The driving member 7 is a motor, which is arranged on the outer bottom wall of the box body 6. The power output shaft 71 of the driving member 7 passes through the bottom wall of the box body 6 and is connected to the lower impeller 2 and the upper impeller 1, and is used to drive the lower impeller 2 and the upper impeller 1 to rotate forward and / or reversely.

[0036] The lower shell 4 is through-connected from top to bottom and has a top opening 401 formed at the top and a bottom opening 402 formed at the bottom. A second water inlet 33 is formed on the bottom wall of the bottom spray arm. The top opening 401 is connected to the second water inlet 33. The lower end of the lower shell 4 abuts against the inner bottom wall of the box body 6 to close the bottom opening 402 and the bottom of the third accommodating chamber 42. This structure facilitates the production and manufacture of the lower shell 4. During installation, the outer edge of the bottom of the lower shell 4 can be fixed to the bottom wall of the box body 6 by screws, which saves material at the bottom of the lower shell 4 and avoids the accumulation of fine residues.

[0037] The inner diameter of the lower part of the lower shell 4 is larger than the inner diameter of the upper part, so that a step surface 43 is formed at the joint, and the first water inlet 411 is opened on the side wall of the upper part of the lower shell 4 and the lower edge is located on the step surface 43. The first water inlet 411 is arranged on the step surface 43, and the step surface 43 is used to guide water to facilitate water inlet.

[0038] In order to facilitate manufacturing, the first water inlet 411 is an annular opening extending along the circumference of the lower shell 4, and a support rib 431 extending longitudinally and used to support the upper part of the lower shell 4 on the step surface 43 is provided on the step surface 43. The outer side wall of the support rib 431 forms a guide slope 432 that gradually tilts outward from top to bottom along the radial direction of the lower shell 4. This structure is conducive to guiding the water flow of the first water inlet 411 to avoid turbulent impact of the water flow and affect the water inlet effect.

[0039] A water supply pipe 8 is provided at the bottom of the box body 6 for connecting the third accommodating chamber 42 with the top spray arm 5, and a flow guide pipe 422 is provided on the side of the lower shell body 4 for tangentially connecting the water outlet 421 with the lower end of the water supply pipe 8. This structure is conducive to reducing the energy loss of water flow and maintaining a high water pressure and flushing capacity of the top spray.

[0040] In this embodiment, the first shaft 11 of the upper impeller 1 is sleeved on the outer periphery of the power output shaft 71 of the driving member 7, the upper part of the upper impeller 1 is a centrifugal structure located in the first accommodating chamber 31, and the lower part is an axial flow structure located in the second accommodating chamber 41. The axial flow structure is used to guide water along the axial direction, and the centrifugal structure is used to disperse the water flow along the radial direction.

[0041] The second shaft 21 of the lower impeller 2 is sleeved on the outer periphery of the power output shaft 71 of the driving member 7. Along the water flow direction, the outer periphery of the second shaft 21 is provided with an upper cover plate 23 and a lower cover plate 24 arranged in an axial interval. The second blades 22 are arranged between the upper cover plate 23 and the lower cover plate 24. The central part of the upper cover plate 23 is provided with a water inlet 231 arranged corresponding to the lower port of the second accommodating chamber 41. The upper cover plate 23, the lower cover plate 24 and the two adjacent second blades 22 together enclose a water delivery port 241. The third accommodating chamber 42 of this embodiment constitutes a relatively closed volute, and the lower impeller 2 is used to provide water-drawing power for the relatively closed volute, which is conducive to improving the head and water flow of the top spray water.

[0042] The inner end surface of the second blade 22 forms a first guide arc surface 221 extending gradually from top to bottom toward the second shaft 21, the upper end of the first guide arc surface 221 is tangentially connected to the inner edge of the water inlet 231, and the lower end of the first guide arc surface 221 is arranged close to the lower end of the second shaft 21. The lower end of the second shaft 21 forms a second guide arc surface 211 with a smooth transition at the junction with the upper wall of the lower cover plate 24. This structure is conducive to guiding the water flow and reducing energy loss.

[0043] The cleaning method of the cleaning machine of this embodiment can present three forms by controlling the forward and reverse rotation of the power output shaft 71 of the driving member 7. When the driving member 7 drives the upper impeller 1 and the lower impeller 2 to rotate forward, the first water inlet 411, the second accommodating chamber 41, the bottom spray arm, and the bottom of the inner cavity of the box body 6 together constitute an independent bottom spray water path; when the driving member 7 drives the upper impeller 1 and the lower impeller 2 to rotate reversely, the first water inlet 411, the third accommodating chamber 42, the water outlet 421, the top spray arm 5, and the bottom of the inner cavity of the box body 6 together constitute an independent top spray water path.

[0044] The three forms of the cleaning method of this embodiment can be:

[0045] (1) When the bottom spray arm operates independently, the power output shaft 71 of the pump 7 rotates forward to pump water from the bottom of the box 6 into the bottom spray arm, and the bottom spray arm sprays upward to clean the tableware in the box 6;

[0046] (2) When the top spray arm 5 operates independently, the power output shaft 71 of the pump 7 is reversed to pump water from the bottom of the box 6 into the top spray arm 5, and the top spray arm 5 sprays upward or downward to clean the tableware in the box 6;

[0047] (3) The bottom spray arm and the top spray arm 5 perform alternate spray cleaning, and the power output shaft 71 of the pump 7 rotates forward and reverse alternately, so that the water at the bottom of the box body 6 switches between downstream and upstream in the pump, performing alternate bottom spraying and top spraying.

[0048] For a washing machine with a partition in the middle of the washing chamber, the top spray arm 5 is generally arranged in the upper chamber and close to the upper wall of the partition, and the water spray hole on the top spray arm 5 is opened on its top wall for spraying upward to clean the dishes in the upper chamber; for a washing machine without a partition in the washing chamber, in addition to the above structure, the top spray arm 5 can also be set at the top of the washing chamber, and the water spray hole on the top spray arm 5 is opened on its bottom wall for spraying downward. Regardless of the above structure, the bottom spray arm and the top spray arm 5 can be independently controlled to switch between each other.

[0049] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0050] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A cleaning method for a cleaning machine, the cleaning machine comprising a box (6), a bottom spray arm, a top spray arm (5) and a pump, the bottom spray arm being arranged in the box (6) and close to the bottom of the box (6), the top spray arm (5) being arranged in the box (6) and close to the middle and upper part, the pump being arranged in the box (6) and used for pumping water for the bottom spray arm and the top spray arm (5), characterized in that: When the bottom spray arm operates independently, the power output shaft of the pump rotates forward to pump water at the bottom of the box (6) into the bottom spray arm, and the bottom spray arm sprays upward to clean the tableware in the box (6); When the top spray arm (5) operates independently, the power output shaft of the pump is reversed to pump water from the bottom of the box (6) into the top spray arm (5), and the top spray arm (5) sprays upward or downward to clean the tableware in the box (6); The power output shaft of the pump rotates forward and reverse alternately, so that the water at the bottom of the box (6) switches between downstream and upstream flow in the pump, performing alternate bottom spraying and top spraying; The pump comprises: An upper impeller (1) has a first shaft (11) located at the center and first blades (12) distributed at intervals in the circumferential direction on the circumferential surface of the first shaft (11) and extending in the axial direction; A lower impeller (2) having a second shaft (21) located at the center and second blades (22) distributed at intervals in the circumferential direction on the outer periphery of the second shaft (21); An upper shell (3) having a first accommodating chamber (31) for mounting the upper portion of the upper impeller (1), a spray hole (32) in fluid communication with the first accommodating chamber (31) being formed on the top wall and / or side wall of the upper shell (3), and the upper shell (3) constitutes the bottom spray arm; A lower shell (4) is arranged below the upper shell (3); the upper part of the lower shell (4) is formed with a second accommodating chamber (41) for mounting the lower part of the upper impeller (1); the lower part of the lower shell (4) is formed with a third accommodating chamber (42) for mounting the lower impeller (2); the second accommodating chamber (41) is connected from top to bottom, and the upper end is connected to the first accommodating chamber (31), and the lower end is connected to the third accommodating chamber (42); the side wall of the upper part of the lower shell (4) is provided with a first water inlet (411) for supplying water into the second accommodating chamber (41); the side wall of the lower part of the lower shell (4) is provided with a water outlet (421) for supplying water out of the third accommodating chamber (42); the water outlet (421) is connected to the top spray arm (5); and The driving member (7) is arranged at the bottom of the box body (6) and the power output shaft (71) is connected to the lower impeller (2) and the upper impeller (1) and is used to drive the lower impeller (2) and the upper impeller (1) to rotate forward and / or reversely.

2. The cleaning method of a cleaning machine according to claim 1, characterized in that: When the driving member (7) drives the upper impeller (1) and the lower impeller (2) to rotate forward, the first water inlet (411), the second accommodating chamber (41), the bottom spray arm, and the bottom of the inner cavity of the box body (6) together independently constitute a bottom spray water path; when the driving member (7) drives the upper impeller (1) and the lower impeller (2) to rotate reversely, the first water inlet (411), the third accommodating chamber (42), the water outlet (421), the top spray arm (5), and the bottom of the inner cavity of the box body (6) together constitute an independent top spray water path.

3. The cleaning method of a cleaning machine according to claim 1, characterized in that: The lower shell (4) is connected from top to bottom and has a top opening at the top and a bottom opening at the bottom. A second water inlet (311) is provided on the bottom wall of the bottom spray arm. The top opening is connected to the second water inlet (311). The lower end of the lower shell (4) abuts against the inner bottom wall of the box body (6) to close the bottom opening and the bottom of the third accommodating chamber (42).

4. The cleaning method of a cleaning machine according to claim 3, characterized in that: The inner diameter of the lower portion of the lower shell (4) is greater than the inner diameter of the upper portion, thereby forming a step surface (43) at the connection point; the first water inlet (411) is opened on the side wall of the upper portion of the lower shell (4) and the lower edge is located on the step surface (43).

5. The cleaning method of a cleaning machine according to claim 4, characterized in that: The first water inlet (411) is an annular opening extending along the circumference of the lower shell (4), and the step surface (43) is provided with support ribs (431) extending longitudinally and used to support the upper part of the lower shell (4) on the step surface (43).

6. The cleaning method of a cleaning machine according to claim 5, characterized in that: The outer side wall of the support rib (431) forms a flow guiding inclined surface (432) which gradually inclines outwards along the radial direction of the lower shell (4) from top to bottom.

7. The cleaning method of a cleaning machine according to any one of claims 1 to 6, characterized in that: A water supply pipe (8) for connecting the third accommodating chamber (42) with the top spray arm (5) is provided at the bottom of the box body (6), and a flow guide pipe (422) for tangentially connecting the water outlet (421) with the lower end of the water supply pipe (8) is provided on the side of the lower shell body (4).

8. The cleaning method of a cleaning machine according to any one of claims 1 to 6, characterized in that: The first shaft (11) of the upper impeller (1) is sleeved on the outer periphery of the power output shaft (71) of the driving member (7); the upper portion of the upper impeller (1) is a centrifugal structure located in the first accommodating chamber (31), and the lower portion is an axial flow structure located in the second accommodating chamber (41).

9. The cleaning method of a cleaning machine according to any one of claims 1 to 6, characterized in that: The second shaft (21) of the lower impeller (2) is sleeved on the outer periphery of the power output shaft (71) of the driving member (7); along the water flow direction, the outer periphery of the second shaft (21) is provided with an upper cover plate (23) and a lower cover plate (24) arranged in an axial direction at intervals; the second blades (22) are arranged between the upper cover plate (23) and the lower cover plate (24); a water inlet (231) arranged corresponding to the lower port of the second accommodating chamber (41) is opened at the central part of the upper cover plate (23); the upper cover plate (23), the lower cover plate (24) and two adjacent second blades (22) together enclose a water delivery port (241).

10. The cleaning method of a cleaning machine according to claim 9, characterized in that: The inner end surface of the second blade (22) forms a first guide arc surface (221) which gradually extends from top to bottom toward the second shaft (21); the upper end of the first guide arc surface (221) is tangentially connected to the inner edge of the water inlet (231); and the lower end of the first guide arc surface (221) is arranged close to the lower end of the second shaft (21).

11. The cleaning method of a cleaning machine according to claim 9, characterized in that: The lower end of the second shaft (21) forms a second flow-guiding arc surface (211) with a smooth transition at the junction with the upper wall surface of the lower cover plate (24).

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