Water flow system for cleaning machine and cleaning machine

Abstract

The present invention relates to a water flow system for a washing machine and a washing machine, comprising a water pump mechanism and a spray arm, wherein the water pump mechanism is provided with a water inlet and a water outlet, wherein the water outlet is provided at the top of the water pump mechanism, wherein a guide vane structure which is stationary relative to the water outlet and can guide water flow from bottom to top is provided in the water pump mechanism, wherein the spray arm is detachably connected to the water outlet of the water pump mechanism; and further comprising a cover which can close the water outlet when the spray arm is connected to the water pump mechanism and when the spray arm is disconnected from the water pump mechanism. The present invention eliminates the interference problem of opening and closing the water outlet during the detachable assembly process of the existing open water pump and the spray arm by providing a guide vane structure which is stationary relative to the water outlet and can guide flow from bottom to top in the water pump mechanism, thereby realizing the requirement that the washing machine can be used as a dishwasher when the spray arm is connected to the open water pump and can be used as an ordinary sink when the spray arm is disconnected from the open water pump, and is convenient to operate and use.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a water flow system for a washing machine and a washing machine. Background Art

[0002] At present, most users generally have two sinks in their kitchens. If a sink-type dishwasher is installed, one of the sinks is used as a normal sink, and the other sink is used as a washing sink for the dishwasher. A spray system is installed in the washing sink, so it cannot be used as a normal sink.

[0003] The applicant's prior application CN202111462798.8 "A cleaning machine" discloses a structure, which includes a sink body, a water outlet and a water chamber connected below the water outlet are provided at the bottom of the sink body, and also includes a return pipe, a cover, an elastic member and a spray arm. A return pipe located next to the water outlet is provided at the bottom of the sink body, and the return pipe is provided outside the sink body and is used to connect the water chamber with the return pipe; the cover can be moved up and down at the return pipe to open or close the return pipe; the elastic member enables the cover to always maintain a tendency to move upward to close the return pipe; the spray arm is detachably provided in the sink body and arranged corresponding to the return pipe. When the spray arm and the return pipe are plugged and connected, the cover is pressed into the return pipe by the spray arm to connect the spray arm with the return pipe. When the spray arm is detached from the return pipe, the cover closes the return pipe under the drive of the elastic member.

[0004] The above solution can be used as a dishwasher or as an ordinary sink. However, its spray arm structure can only realize a detachable connection with a closed water pump. Since the impeller of the existing open water pump needs to rotate and cooperate with the spray arm to draw water, the spray arm and the open water pump always need to be unobstructed. Therefore, it is impossible to meet the dual-use of the sink by disassembling the spray arm and the open water pump, which limits the use of the open water pump in this type of washing machine. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a water flow system for a cleaning machine that can meet the dual-use requirements of a water tank by disassembling and assembling a spray arm and an open water pump in view of the current status of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned water flow system in view of the current status of the prior art.

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

[0008] A water flow system for a cleaning machine comprises a water pump mechanism and a spray arm, wherein the water pump mechanism is provided with a water suction port and a water outlet, wherein the water outlet is provided at the top of the water pump mechanism, wherein a guide vane structure which is stationary relative to the water outlet and can guide water flow from bottom to top is provided in the water pump mechanism, wherein the spray arm is detachably connected to the water outlet of the water pump mechanism; and further comprising a cover which can close the water outlet when the spray arm is connected to the water pump mechanism and can close the water outlet when the spray arm is disconnected from the water pump mechanism.

[0009] In the present invention, the water pump mechanism comprises:

[0010] A pump casing, wherein the water suction port is opened at the bottom of the pump casing;

[0011] The guide vane structure is arranged in the pump casing and divides the inner cavity of the pump casing into relatively independent upper and lower cavities, and is used to disperse the water in the lower cavity in the circumferential direction, input the water into the upper cavity, and then output the water upward through the water outlet in the axial direction;

[0012] an impeller rotatably disposed in the lower cavity, for drawing water in the return water area into the lower cavity and conveying the water flow upward; and

[0013] The driving member is arranged outside the water tank body and is used for providing power for the impeller to rotate.

[0014] The above-mentioned water pumping mechanism is provided with a guide vane structure and an impeller in the pump casing for circumferentially guiding and pressurizing the axially incoming water and then outputting it axially to meet the water pressure requirements. On this basis, the spray arm is arranged on the pump casing without the need to cooperate with the impeller, thereby improving the stability of the water flow entering the spray arm and thus improving the rotation stability of the spray arm. At the same time, since the impeller no longer corresponds to the water inlet of the spray arm, the water pressure at the water inlet of the spray arm is stabilized, avoiding gas inhalation and water leakage problems.

[0015] Preferably, the guide vane structure includes a cover plate and a guide vane, the cover plate is transversely arranged in the middle of the pump casing and divides the inner cavity of the pump casing into relatively independent upper and lower cavities, the water outlet is connected to the upper cavity, the guide vanes are multiple and vertically arranged on the lower surface of the cover plate, the multiple guide vanes cover the circumferential area of ​​the cover plate and are arranged at intervals along the circumference, the guide vanes spirally extend inward from the edge of the cover plate against the direction of water flow, a guide channel is constrained between two adjacent guide vanes, the cover plate portion corresponding to the top of the guide vane is at least partially missing to form a gap for connecting the guide channel with the upper cavity. The guide vane structure is used to guide the axial water inlet circumferentially, pressurize it and then output it axially to meet the water pressure requirements. On this basis, the spray arm is set on the pump casing without the need to cooperate with the impeller, which improves the stability of the water flow entering the spray arm and thus improves the rotation stability of the spray arm. At the same time, since the impeller no longer corresponds to the water inlet of the spray arm, the water pressure at the water inlet of the spray arm is stable, avoiding gas inhalation and water leakage problems.

[0016] Preferably, the impeller is a centrifugal impeller, with an inlet at the bottom corresponding to the arrangement of the water suction port and an outlet at the side corresponding to the arrangement of the guide vanes.

[0017] Preferably, the outer end of the guide vane is arranged close to the inner peripheral wall of the pump casing and the outer end is arranged close to the edge of the impeller. In the two adjacent guide vanes, the outer end portion of the first guide vane and the inner end portion of the second guide vane are arranged in an interlaced manner to enclose the guide channel. The cover plate is missing in the range from the outer end of the first guide vane to the outer end of the second guide vane to form the gap. With such a structure, the gap is reasonably connected with the water outlet end of the guide channel to reduce energy loss.

[0018] Preferably, the upper surface of the cover plate is provided with converging blades extending spirally from the edge to the middle and used to gather the water flow conveyed through the notch to the water outlet. This structure can rectify and guide the water flow entering the upper cavity, avoid energy loss caused by turbulent water flow, and increase water pressure and head.

[0019] Preferably, the present invention further comprises a cover and an elastic member, wherein the cover can be movably arranged in the upper cavity of the pump housing and is used to open or close the water outlet, the elastic member is arranged on the guide vane structure and keeps the cover moving upward all the time, the bottom of the spray arm is provided with a water inlet sleeve, the lower end of the water inlet sleeve is provided with a support foot that can pass through the water outlet and press the cover to move downward, and the water inlet sleeve is connected to the top of the water pump through a detachable locking structure. The above structure is used to press the cover to open the water outlet and connect the spray arm with the water outlet of the pump housing.

[0020] Preferably, when the spray arm and the water pump mechanism are assembled, the bottom edge of the water inlet sleeve abuts against the top wall of the pump casing and is arranged around the periphery of the water outlet, the lower end of the support foot abuts against the upper surface of the cover, and the elastic member is in a compressed state.

[0021] Preferably, the support leg comprises support ribs extending downward from the inner edge of the lower end of the water inlet jacket, the support ribs are at least two and are arranged at intervals in the circumferential direction of the water inlet jacket, and the lower end of the support rib is connected to an inverted U-shaped flow guide arranged in the central part of the water inlet jacket and arched upward. The support leg formed by the support ribs can also guide the water flow upward because it is located in the upper cavity, so as to reduce the energy loss of the water flow.

[0022] Preferably, the guide vane structure is provided with a converging vane located in the upper cavity and spirally extending from the edge of the upper cavity to the middle, and used to gather the water flow transported from the lower cavity to the water outlet. The inner ends of the converging vanes together enclose a receiving cavity for accommodating a cover and an elastic member. The cover is movably arranged in the receiving cavity, and the elastic member is elastically compressed under the cover. The converging vane gathers the water flow from the edge of the upper cavity to the middle, and then guides the water upward through the support feet to reduce energy loss.

[0023] Preferably, the edge of the cover is provided with a plurality of spaced limiting openings, and the inner end of the converging blade extends into the limiting opening and cooperates with the limiting opening in an up-and-down guiding manner. The converging blade gathers and straightens the water in the upper cavity, and is used to form an up-and-down guiding manner with the cover on the other hand.

[0024] Preferably, the cover has a horizontally arranged top wall and a diversion slant wall extending radially outward and downward from the edge of the top wall, the limit opening is provided on the diversion slant wall, and the upper surface of the cover top wall constitutes a supporting surface for cooperating with the support foot. This structure is conducive to further reducing energy loss.

[0025] In order to facilitate the constraint of the spring position, a first limiting portion extending upward is provided on the bottom wall of the accommodating cavity, and correspondingly, a second limiting portion extending downward is provided on the lower surface of the cover, and the elastic member is a spring, and the lower end of the spring is sleeved on the outer periphery of the first limiting portion, and the upper end of the spring is sleeved on the outer periphery of the second limiting portion.

[0026] Preferably, the locking structure includes a collar, the middle of which is provided with an assembly sleeve that can be sleeved on the outer periphery of the water inlet sleeve and locked with the water inlet sleeve, and the outer edge of the collar is locked with the outer peripheral wall of the pump housing exposed above the filter plate through a buckle structure. This structure facilitates detachable connection.

[0027] Compared with the prior art, the advantages of the present invention are as follows: the present invention eliminates the interference problem of the opening and closing of the water outlet during the detachable assembly of the existing open water pump and the spray arm by arranging a guide vane structure in the water pump mechanism which is stationary relative to the water outlet and can guide the water from bottom to top, thereby realizing the requirement that the dishwasher can be used as a dishwasher when the spray arm and the open water pump are connected, and can be used as an ordinary sink when the spray arm and the open water pump are disconnected, and the operation and use are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a cleaning machine according to an embodiment of the present invention (in use as a dishwasher);

[0029] Figure 2 This is a schematic diagram of the structure of the cleaning machine according to an embodiment of the present invention (in use as a common water tank);

[0030] Figure 3 for Figure 1 A cross-sectional view of

[0031] Figure 4 for Figure 3 A partial enlarged view of

[0032] Figure 5 This is a diagram showing the coordination between the spray arm and the clamp ring in an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the top shell of the hidden part of the water pump mechanism in an embodiment of the present invention;

[0034] Figure 7 This is an exploded view of the water pump mechanism in an embodiment of the present invention;

[0035] Figure 8 for Figure 7 Another angle view of

[0036] Fig. 9 Schematic diagram of the structure of the space guide vane in an embodiment of the present invention;

[0037] Fig.10 for Fig. 9 Meaning angle diagram. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 10 As shown, the water flow system for the cleaning machine in this embodiment includes a water pump mechanism 2 and a spray arm 3. The water pump mechanism 2 is provided with a water inlet 201 and a water outlet 202. The water outlet 202 is provided at the top of the water pump mechanism 2. The water pump mechanism 2 is provided with a guide vane structure 22 which is stationary relative to the water outlet 202 and can guide the water flow from bottom to top. The spray arm 3 is detachably connected to the water outlet 202 of the water pump mechanism 2. It also includes a cover 5 which can close the water outlet 202 when the spray arm 3 is connected to the water pump mechanism 2 and close the water outlet 201 when the spray arm 3 is disconnected from the water pump mechanism 2.

[0040] The cleaning machine of this embodiment includes a water tank body 1 and the above-mentioned water flow system. The bottom of the water tank body 1 is provided with a concave water return area 11, the top of the water return area 11 is covered with a filter plate 12, the water pump mechanism 2 is provided in the water return area 11, and the water suction port 201 is connected with the water return area 11. The filter plate 12 is provided with a mounting port 121 for the top wall of the water pump mechanism 2 to be exposed, the water outlet 202 is provided on the top wall of the water pump mechanism 2 and exposed at the mounting port 121, and the spray arm 3 is detachably connected to the water outlet 202 of the water pump mechanism 2; when the spray arm 3 is separated from the water pump mechanism 2, the filter plate 12 and the top wall of the water pump mechanism 2 constitute part of the bottom wall of the water tank body 1. The bottom of the water return area 11 is provided with a drain port 111, the lower part of the slag collection basket 4 is accommodated in the water return area 11 and the bottom is arranged corresponding to the drain port 111, and the top of the slag collection basket 4 is provided with a slag collection port 41 exposed at the filter plate 12. The slag collecting basket 4 can filter the slag when used as a dishwasher, and can filter the slag when used as a common sink.

[0041] Specifically, the water pump mechanism 2 includes a pump housing 21, a guide vane structure 22, an impeller 23, and a driving member 24. The pump housing 21 is roughly barrel-shaped, and the water suction port 201 is opened at the bottom of the pump housing 21. The guide vane structure 22 is arranged in the pump housing 21 and divides the inner cavity of the pump housing 21 into a relatively independent upper cavity 211 and a lower cavity 212, which is used to input the water in the lower cavity 212 into the upper cavity 211 after circumferential dispersion, and then output it upward from the axial direction through the water outlet 202. The impeller 23 is a centrifugal impeller, which is rotatably arranged in the lower cavity 212, and is used to draw water in the return water area 11 into the lower cavity 212 and transport the water flow upward. The driving member 24 is a motor, which is arranged outside the bottom of the water tank body 1, and is used to provide power for the rotation of the impeller 23.

[0042] The water pump mechanism 2 is provided with a guide vane structure 22 and an impeller 23 in the pump casing 21 for axially guiding and pressurizing the axially incoming water and then outputting it axially to meet the water pressure requirements. On this basis, the spray arm 3 is arranged on the pump casing 21 without the need to cooperate with the impeller 23, thereby improving the stability of the water flow entering the spray arm 3 and thus improving the rotation stability of the spray arm 3. At the same time, since the impeller 23 no longer corresponds to the water inlet of the spray arm 3, the water pressure at the water inlet of the spray arm 3 is stabilized, thereby avoiding the problems of gas suction and water leakage.

[0043] The guide vane structure 22 includes a cover plate 221 and a guide plate 222. The cover plate 221 is horizontally arranged in the middle of the pump casing 21 and divides the inner cavity 21 of the pump casing into relatively independent upper cavity 211 and lower cavity 212. The water outlet 202 is connected to the upper cavity 211. There are multiple guide plates 222 and they are vertically arranged on the lower surface of the cover plate 221. The multiple guide plates 222 cover the circumferential area of ​​the cover plate 221 and are arranged at intervals along the circumference. The guide plates 222 extend spirally inward from the edge of the cover plate 221 against the direction of water flow. A guide channel 223 is constrained between two adjacent guide plates 222. The portion of the cover plate 221 corresponding to the top of the guide plate 222 is at least partially missing to form a gap 224 for connecting the guide channel 223 with the upper cavity 211. The impeller 23 is a centrifugal impeller, with an inlet at the bottom corresponding to the water suction port 201 and an outlet at the side corresponding to the guide vane 222 .

[0044] The outer end of the guide vane 222 is arranged close to the inner circumferential wall of the pump housing 21, and the outer end is arranged close to the edge of the impeller 23. In the two adjacent guide vanes 222, the outer end portion of the first guide vane 222 and the inner end portion of the second guide vane 222 are arranged in an interlaced manner to enclose a guide channel 223. The cover plate 221 is missing in the range from the outer end of the first guide vane 222 to the outer end of the second guide vane 222 to form a notch 224. With such a structure, the notch 224 is reasonably connected with the water outlet end of the guide channel 223 to reduce energy loss.

[0045] The upper surface of the cover plate 221 is provided with a converging blade 225 extending spirally from the edge to the middle and used to gather the water flow conveyed through the notch 224 to the water outlet. This structure can rectify and guide the water flow entering the upper cavity 211, avoid energy loss caused by turbulent water flow, and increase water pressure and lift.

[0046] In this embodiment, an elastic member 6 is also included. The cover 5 is disposed in the upper cavity 211 of the pump housing 21 so as to be movable up and down, and is used to open or close the water outlet 202. The elastic member 6 is a spring, and the elastic member 6 is disposed on the guide vane structure 22 so as to keep the cover 5 always in a tendency to move upward. A water inlet sleeve 31 is disposed at the bottom of the spray arm 3. The lower end of the water inlet sleeve 31 is provided with a support leg 32 that can pass through the water outlet 202 and press the cover 5 to move downward. The water inlet sleeve 31 is connected to the top of the water pump 21 through a detachable locking structure. The above structure is used to press the cover 5 to open the water outlet 202, and at the same time, the spray arm 3 is connected to the water outlet 202 of the pump housing 21.

[0047] When the spray arm 3 and the water pump mechanism 21 are assembled, the bottom edge of the water inlet sleeve 31 abuts against the top wall of the pump housing 21 and is arranged around the periphery of the water outlet 202, the lower end of the support leg 32 abuts against the upper surface of the cover 5, and the elastic member 6 is in a compressed state.

[0048] like Figure 4 , 5 As shown, the support leg 32 includes a support rib 321 extending downward from the inner edge of the lower end of the water inlet jacket 31. The support rib 321 is three and is arranged at intervals in the circumferential direction of the water inlet jacket 31. The lower end of the support rib 321 is connected to an inverted U-shaped guide member 322 arranged in the central part of the water inlet jacket 31 and arched upward. The support leg 32 formed by the support rib 321 is located in the upper cavity 211, and can also play a role in guiding the water flow upward to reduce the energy loss of the water flow.

[0049] The guide vane structure 22 is provided with a converging vane 225 located in the upper cavity 211 and extending spirally from the edge of the upper cavity 211 to the middle, and used to gather the water flow transported from the lower cavity to the water outlet 202. The inner ends of the converging vanes 225 jointly enclose a receiving cavity 226 for accommodating the cover 5 and the elastic member 6. The cover 5 is disposed in the receiving cavity 226 so as to be movable up and down, and the elastic member 6 is elastically compressed under the cover 5. The converging vane 225 gathers the water flow from the edge of the upper cavity 211 to the middle, and then guides the water upward through the support foot 32 to reduce energy loss.

[0050] The edge of the cover 5 is provided with a plurality of spaced limiting openings 51, and the inner end of the converging blade 225 extends into the limiting opening 51 and cooperates with the limiting opening 51 in an up-down guiding manner. The converging blade 225, on the one hand, gathers and rectifies the water in the upper cavity 211, and on the other hand, is used to form an up-down guiding manner with the cover 5.

[0051] The cover 5 has a horizontally arranged top wall and a diversion slant wall 52 extending radially outward and downward from the edge of the top wall. The limit opening 51 is provided on the diversion slant wall 52. The upper surface of the top wall of the cover 5 constitutes a supporting surface for cooperating with the support foot 32. This structure is conducive to further reducing energy loss.

[0052] In order to facilitate the constraint of the spring position, a first limiting portion 2261 extending upward is provided on the bottom wall of the accommodating cavity 226, and correspondingly, a second limiting portion 53 extending downward is provided on the lower surface of the cover 5, and the lower end of the spring is sleeved on the outer periphery of the first limiting portion 2261, and the upper end of the spring is sleeved on the outer periphery of the second limiting portion 53.

[0053] The locking structure of this embodiment includes a collar 7, the middle of which is provided with an assembly sleeve 71 that can be sleeved on the outer periphery of the water inlet sleeve 31 and is locked with the water inlet sleeve 31, and the outer edge of the collar 7 is locked with the outer peripheral wall of the pump housing 21 exposed above the filter plate 12 through a buckle structure. This structure facilitates detachable connection.

[0054] This embodiment eliminates the interference problem of the opening and closing of the water outlet during the detachable assembly of the existing open water pump and the spray arm 3 by setting a guide vane structure 22 in the water pump mechanism 2 that is stationary relative to the water outlet 202 and can guide the water from bottom to top. This realizes the requirement that the device can be used as a dishwasher when the spray arm and the open water pump are connected, and can be used as an ordinary sink when the spray arm and the open water pump are disconnected, and is easy to operate and use.

[0055] 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.

Claims

1. A water flow system for a cleaning machine, comprising a water pump mechanism (2) and a spray arm (3), wherein the water pump mechanism (2) is provided with a water suction port (201) and a water outlet (202), and characterized in that: The water outlet (202) is provided at the top of the water pumping mechanism (2); a guide vane structure (22) is provided in the water pumping mechanism (2) and is stationary relative to the water outlet (202) and is capable of guiding water flow from bottom to top; the spray arm (3) is detachably connected to the water outlet (202) of the water pumping mechanism (2); and a cover (5) is also provided which is capable of opening the water outlet (202) when the spray arm (3) is connected to the water pumping mechanism (2) and closing the water outlet (202) when the spray arm (3) is disconnected from the water pumping mechanism (2); The water pump mechanism (2) comprises: A pump casing (21), wherein the water suction port (201) is provided at the bottom of the pump casing (21); a guide vane structure (22) disposed in the pump housing (21) and dividing the inner cavity of the pump housing (21) into relatively independent upper cavity (211) and lower cavity (212), and used for dispersing water in the lower cavity (212) in a circumferential direction, inputting the water into the upper cavity (211), and then outputting the water upwardly through the water outlet (202) in an axial direction; and An impeller (23) is rotatably disposed in the lower cavity (212) and is used to draw water in the return water area (11) into the lower cavity (212) and transport the water flow upward; The spray arm (3) further comprises an elastic member (6), the sealing cover (5) being arranged in the upper cavity (211) of the pump housing (21) so as to be movable up and down and being used for opening or closing the water outlet (202), the elastic member (6) being arranged on the guide vane structure (22) so as to keep the sealing cover (5) always in a tendency to move upward, a water inlet sleeve (31) being arranged at the bottom of the spray arm (3), a support leg (32) being arranged at the lower end of the water inlet sleeve (31) being able to pass through the water outlet (202) and press the sealing cover (5) to move downward, and the water inlet sleeve (31) being connected to the top of the pump housing (21) via a detachable locking structure.

2. The water flow system for a cleaning machine according to claim 1, characterized in that: The guide vane structure (22) comprises a cover plate (221) and a guide vane (222); the cover plate (221) is transversely arranged in the middle of the pump housing (21) and divides the inner cavity of the pump housing (21) into a relatively independent upper cavity (211) and a lower cavity (212); the water outlet (202) is connected to the upper cavity (211); the guide vane (222) is a plurality of guide vanes (222) arranged vertically on the lower surface of the cover plate (221); 2) covering the circumferential area of ​​the cover plate (221) and arranged at intervals along the circumference, the guide plates (222) spirally extending inward from the edge of the cover plate (221) in the opposite direction of the water flow, constraining a guide channel (223) between two adjacent guide plates (222), and the portion of the cover plate (221) corresponding to the top of the guide plate (222) is at least partially missing to form a gap (224) for connecting the guide channel (223) with the upper cavity (211).

3. The water flow system for a cleaning machine according to claim 2, characterized in that: The impeller (23) is a centrifugal impeller (23), with an inlet at the bottom corresponding to the arrangement of the water suction port (201) and an outlet at the side corresponding to the arrangement of the guide vane (222).

4. The water flow system for a cleaning machine according to claim 2, characterized in that: The outer end of the guide vane (222) is arranged close to the inner circumferential wall of the pump casing (21), and the outer end is arranged close to the edge of the impeller (23). In the two adjacent guide vanes (222), the outer end portion of the first guide vane (222) and the inner end portion of the second guide vane (222) are arranged in an alternating manner to enclose the guide channel (223). The cover plate (221) is missing in the range from the outer end of the first guide vane (222) to the outer end of the second guide vane (222) to form the notch (224).

5. The water flow system for a cleaning machine according to claim 2, characterized in that: The upper surface of the cover plate (221) is provided with converging blades (225) that spirally extend from the edge toward the middle and are used to gather the water flow conveyed through the notch (224) toward the water outlet (202).

6. The water flow system for a cleaning machine according to any one of claims 1 to 5, characterized in that: When the spray arm (3) and the water pump mechanism (2) are assembled, the bottom edge of the water inlet sleeve (31) abuts against the top wall of the pump housing (21) and is arranged around the periphery of the water outlet (202), the lower end of the support leg (32) abuts against the upper surface of the cover (5), and the elastic member (6) is in a compressed state.

7. The water flow system for a cleaning machine according to any one of claims 1 to 5, characterized in that: The support leg (32) comprises a support rib (321) extending downward from the inner edge of the lower end of the water inlet jacket (31), the support ribs (321) being at least two and arranged at intervals in the circumferential direction of the water inlet jacket (31), and the lower end of the support rib (321) is connected to an inverted U-shaped guide piece (322) arranged in a corresponding central part of the water inlet jacket (31) and arching upward.

8. The water flow system for a cleaning machine according to any one of claims 1 to 5, characterized in that: The guide vane structure (22) is provided with a converging vane (225) located in the upper cavity (211) and extending spirally from the edge of the upper cavity (211) toward the middle, and is used to gather the water flow conveyed from the lower cavity (212) toward the water outlet (202). The inner ends of the converging vanes (225) jointly enclose a receiving cavity (226) for accommodating the cover (5) and the elastic member (6). The cover (5) is movably arranged in the receiving cavity (226) up and down, and the elastic member (6) is elastically compressed under the cover (5).

9. The water flow system for a cleaning machine according to claim 8, characterized in that: The edge of the cover (5) is provided with a plurality of spaced apart limiting openings (51), and the inner end of the converging blade (225) extends into the limiting opening (51) and cooperates with the limiting opening (51) in an up-and-down guiding manner.

10. The water flow system for a cleaning machine according to claim 9, characterized in that: The cover (5) has a horizontally arranged top wall and a diversion slant wall (52) extending radially outward and downward from the edge of the top wall. The limit opening (51) is provided on the diversion slant wall (52). The upper surface of the top wall of the cover (5) constitutes a supporting surface for cooperating with the support foot (32).

11. The water flow system for a cleaning machine according to claim 10, characterized in that: A first limiting portion (2261) extending upward is provided on the bottom wall of the accommodating cavity (226), and correspondingly, a second limiting portion (53) extending downward is provided on the lower surface of the cover (5), and the elastic member (6) is a spring, and the lower end of the spring is sleeved on the outer periphery of the first limiting portion (2261), and the upper end of the spring is sleeved on the outer periphery of the second limiting portion (53).

12. The water flow system for a cleaning machine according to any one of claims 1 to 5, characterized in that: The locking structure comprises a clamping ring (7), the middle part of which is provided with an assembly sleeve (71) which can be sleeved on the outer periphery of the water inlet sleeve (31) and is locked with the water inlet sleeve (31), and the outer edge of the clamping ring (7) is locked with the outer peripheral wall of the pump housing (21) exposed above the filter plate (12) through a snap structure.

13. A cleaning machine, comprising a water tank body, characterized in that: It also includes a water flow system as described in any one of claims 1 to 12, wherein a concave water return area (11) is provided at the bottom of the water tank body (1), and the top of the water return area (11) is covered with a filter plate (12), and the water pump mechanism is arranged in the water return area and the water outlet at the top is exposed to the filter plate.

14. The cleaning machine according to claim 13, characterized in that: It also comprises a slag collecting basket (4), the bottom of the return water area (11) is provided with a drainage port (111), the lower part of the slag collecting basket (4) is accommodated in the return water area (11) and the bottom is arranged corresponding to the drainage port (111), and the top of the slag collecting basket (4) is provided with a slag collecting port (41) exposed from the filter plate (12).

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