A spray system and a cleaning machine using the spray system

Abstract

The present invention relates to a spray system and a cleaning machine using the spray system. The spray system includes a first spray arm, a second spray arm, an impeller assembly and a driving member. The first spray arm and the second spray arm are arranged at intervals from top to bottom. The lower wall of the second spray arm is provided with a first water inlet and the top wall is provided with a water spray hole. A pump housing connected to the first water inlet is arranged below the second spray arm. The bottom wall of the pump housing is provided with a second water inlet and the top wall is provided with a first water outlet arranged corresponding to the first water inlet. The side wall of the pump housing is tangentially connected with a water guide pipe that can guide the water in the pump housing into the first spray arm. The first spray arm and the second spray arm of the present invention spray up and down, expand the spray range, are conducive to eliminating cleaning dead corners, and improve the cleaning effect; the spray system takes in water from the bottom of the pump housing and discharges water from the top and the side, and the centrifugal impeller simultaneously realizes drawing water to the first spray arm and circumferentially dispersing the water flow in the second spray arm, and cooperates with the pump housing structure to stabilize the water flow of the upper and lower layers, and simplifies the overall structure.

Description

Technical Field

[0001] The invention relates to a spray system and a cleaning machine using the spray system. Background Art

[0002] As people's living standards continue to improve, dishwashers, as a kitchen appliance, are increasingly entering households. Currently, dishwashers on the market are generally divided into three types: desktop, cabinet, and tank. Among them, desktop dishwashers are integrated independent structures and are generally placed on the table for use; cabinet dishwashers are also independent structures, but need to be embedded in kitchen cabinets for use; tank dishwashers are combined with sinks and are generally installed in kitchen cabinets for use.

[0003] The various forms of dishwashers mentioned above generally use a water pump to lift water and spray it onto the dishes, fruits and vegetables in the cleaning space to achieve the cleaning effect. They use a single-layer spray system, and their impellers can only meet the flow and pressure required by the single-layer spray system. When working, the tableware is above the spray arm, and the spray arm sprays water from bottom to top to rinse the tableware. Since the cleaning water flow has impact force only in a limited direction, the current sink dishwasher has very high requirements for the user's tableware placement and tableware shape. Incorrect placement of tableware or mismatched shapes of tableware will result in unsatisfactory cleaning. When the tableware is placed correctly, impurities may remain on the top of some shapes of tableware, affecting the cleaning effect and user experience.

[0004] A double-layer spray system that sprays simultaneously from top to bottom can effectively improve the cleaning effect. Therefore, it is particularly necessary to provide a structure that can meet the flow rate and pressure required by the double-layer spray system. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a spray system that can provide a stable water flow rate between upper and lower layers to improve the cleaning effect 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 spray system capable of distributing water flow to upper and lower layers so as to improve the cleaning effect in view of the current status of the prior art.

[0007] The third technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned spray system in view of the current status of the prior art.

[0008] The technical solution adopted by the present invention to solve at least one of the above-mentioned technical problems is: a spray system, including a first spray arm, a second spray arm, an impeller assembly and a driving member, the first spray arm and the second spray arm are arranged at an interval up and down, the impeller assembly is used to pump water below the second spray arm to the first spray arm and the second spray arm, and the driving member is used to drive the impeller assembly to rotate, characterized in that: a first water inlet is opened on the lower wall surface of the second spray arm, and a water spray hole is opened on the top wall, a pump casing connected to the first water inlet is arranged below the second spray arm, a second water inlet is opened on the bottom wall of the pump casing, and a first water outlet corresponding to the first water inlet is opened on the top wall, a water guide pipe capable of guiding water in the pump casing into the first spray arm is tangentially connected to the side wall of the pump casing, and the impeller assembly has a centrifugal impeller that can pass through the first water outlet and the upper part is located in the second spray arm and the lower part is located in the pump casing.

[0009] In the present invention, the centrifugal impeller is provided with a baffle that can move up and down to control the water flow from the pump housing into the second spray arm, and the baffle is located in the second spray arm and extends along the radial direction of the centrifugal impeller. Specifically, the baffle moves upward to the upper end of the centrifugal impeller to generate negative pressure between the baffle and the inner top wall of the second spray arm, and the baffle moves downward to cover the first water inlet to separate the pump housing from the second spray arm. When a double layer of dishes is placed in the dishwasher, the baffle moves to the upper end of the centrifugal impeller. The centrifugal impeller drives the baffle to rotate during rotation, and negative pressure is formed between the baffle and the inner top wall of the second spray arm, which is conducive to increasing the suction force into the second spray arm and thus increasing the water flow of the second spray arm, so as to eliminate the problem of small water flow of the second spray arm caused by the branch water flow output under the second spray arm in the prior art; when only dishes are placed on the upper layer in the dishwasher, the baffle can be moved to cover the first water inlet, so as to separate the pump casing from the second spray arm, and the spray system mainly supplies water to the first spray arm for spray cleaning of the upper layer to meet the cleaning needs.

[0010] In the above scheme, the centrifugal impeller includes a first sleeve located in the center and a plurality of centrifugal blades arranged at intervals on the outer periphery of the first sleeve, and the upper part of each centrifugal blade is located above the first sleeve to form a shaft hole arranged in the center of the first sleeve; the baffle includes a second sleeve located in the center and a plurality of baffles arranged at intervals on the outer periphery of the second sleeve, the second sleeve can be moved up and down in the shaft hole, and a first gap for the centrifugal blades to pass through is formed between two adjacent baffles. With such a structure, it is easy to achieve the coordination between the baffle and the centrifugal impeller during the up and down movement.

[0011] Preferably, the top edge of the centrifugal blade gradually tilts downward from the outer edge to the inner edge to form a first arc-shaped edge, and accordingly, the baffle has an arc-shaped structure relative to the first arc-shaped edge. Specifically, the baffle has a first baffle and a second baffle arranged at intervals up and down, the curvature of the first baffle is greater than the curvature of the first arc-shaped edge and the inner end is connected to the second sleeve and arranged through the second gap between adjacent centrifugal blades, the curvature of the second baffle is consistent with the curvature of the first arc-shaped edge and the outer end is connected to the middle of the lower wall surface of the first baffle and the inner end extends to the outer edge of the second gap. Such a structure is adopted to improve the sealing between the centrifugal impeller and the baffle, and when the baffle covers the first water inlet, it prevents more water from still passing through the gap between the baffle and the centrifugal impeller and entering the second spray arm.

[0012] In the present invention, the driving member includes a motor, a motor shaft and a connecting rod. The motor is arranged below the second spray arm and the output end is connected to the motor shaft. The motor shaft is connected to the centrifugal impeller to drive the centrifugal impeller to rotate. The motor shaft is hollow inside to form a receiving tube that passes through the receiving tube. The connecting rod can move up and down through the receiving tube and the upper end is connected to the baffle. The above structure is adopted to facilitate the connecting rod to move up and down to drive the baffle to move up and down.

[0013] Preferably, the upper end of the connecting rod passes through the first sleeve and is fixedly connected to the second sleeve, and the lower end of the connecting rod is connected to an electromagnetic assembly that can drive it to move up and down. The elastic member in the electromagnetic assembly keeps the connecting rod moving upward all the time, and when the electromagnetic assembly is powered on, the connecting rod overcomes the elastic force of the elastic member and moves downward.

[0014] In order to facilitate the rotatable support of the second spray arm on the pump housing, a clamping ring is arranged around the first water outlet on the top wall of the pump housing. Correspondingly, a buckle is provided on the periphery of the first water inlet of the bottom wall of the second spray arm, which extends downward into the clamping ring and is clamped with the bottom wall inside the clamping ring.

[0015] Preferably, the cross section of the upper wall of the collar is formed into a horizontal first L-shaped structure, and the lower wall of the second spray arm is provided with a second L-shaped structure corresponding to and matching the first L-shaped structure to form a labyrinth-shaped gap. This structure is conducive to increasing the water flow creeping distance at the connection between the second spray arm and the pump housing, so as to reduce water flow leakage and avoid the local formation of negative pressure areas to inhale air, thereby ensuring the conversion of hydraulic efficiency.

[0016] Preferably, a guide seat for supporting the pump casing is provided under the pump casing, the guide seat has support arms arranged at intervals on the periphery and a guide sleeve located in the central part and penetrating up and down, the upper end of the guide sleeve is connected with the second water inlet of the pump casing, and an axial flow impeller rotating synchronously with the centrifugal impeller is provided in the guide sleeve.

[0017] Preferably, the water conduit is in a U-shaped structure, wherein the first vertical portion of the U-shaped water conduit is horizontally connected below the second spray arm, the middle portion is vertically arranged, the second vertical portion is horizontally arranged above the second spray arm, and the water outlet end is connected to the first spray arm.

[0018] Preferably, a third water inlet connected to the water pipe is formed on the top wall of the first spray arm, and a second water spray hole is formed on the bottom wall and / or the top wall.

[0019] A cleaning machine using the above-mentioned spray system comprises a box body with a washing chamber, a concave drain area is arranged at the bottom of the box body, and the top of the drain area is covered with a drain plate, characterized in that: the bottom of the spray system is supported in the drain area, the pump housing, the second spray arm, and the first spray arm are located above the drain plate, and the second water inlet of the pump housing is connected to the drain area below the drain plate.

[0020] Compared with the prior art, the advantages of the present invention are: the present invention is provided with a first spray arm and a second spray arm for upper and lower spraying, which expands the spraying range, is conducive to eliminating cleaning dead corners, and improves the cleaning effect; the spray system takes in water from the bottom of the pump casing and discharges water from the top and sides, and the centrifugal impeller simultaneously draws water to the first spray arm and disperses the water flow in the second spray arm circumferentially, cooperates with the pump casing structure to stabilize the water flow of the upper and lower layers, and simplifies the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a spray system according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram from another angle;

[0023] Figure 3 It is a cross-sectional view of the spray system of an embodiment of the present invention (the baffle is located at the upper end of the centrifugal impeller);

[0024] Figure 4 for Figure 3 A partial enlarged view of

[0025] Figure 5 It is a partial cross-sectional view of the spray system of an embodiment of the present invention (the baffle is located in the middle of the centrifugal impeller);

[0026] Figure 6 Schematic diagram of the assembly structure of the centrifugal impeller and the baffle in the embodiment of the present invention (the baffle is located at the upper end of the centrifugal impeller);

[0027] Figure 7 for Figure 6 A cross-sectional view of

[0028] Figure 8 A schematic diagram of the structure of a baffle in an embodiment of the present invention;

[0029] Fig. 9 for Figure 8 Schematic diagram from another angle;

[0030] Fig.10 Schematic diagram of the structure of the centrifugal impeller in the embodiment of the present invention;

[0031] Fig.11 for Figure 4 A magnified view of part A;

[0032] Fig.12 is a cross-sectional view of a cleaning machine according to an embodiment of the present invention;

[0033] Fig.13 Schematic diagram of the matching structure of the connecting rod and the electromagnetic assembly in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 12 As shown, the washing machine of this embodiment includes a box body 7 and a spray system a. The box body 7 is hollow inside to form a washing chamber 71. The side of the box body 7 has an opening, and a door is provided at the opening, which can be opened to put dishes into the washing chamber 71. A concave drain area 72 is provided at the bottom of the box body 7, and the top of the drain area 72 is covered with a drain plate 73. The bottom of the spray system a is supported in the drain area 72 to pump the water in the drain area 72 upward.

[0036] The spray system a of this embodiment includes a first spray arm 1, a second spray arm 2, an impeller assembly 3 and a driving member 4. The first spray arm 1 and the second spray arm 2 are arranged in an upper and lower spaced relationship. The impeller assembly 3 is rotatably arranged at the lower side of the second spray arm 2, and is used to pump water under the second spray arm 2 to the first spray arm 1 and the second spray arm 2. The driving member 4 is used to drive the impeller assembly 3 to rotate. Figure 4 As shown, a first water inlet 21 is formed on the lower wall of the second spray arm 2, a first water spray hole 22 is formed on the top wall, a water collecting chamber 23 is formed in the central part of the second spray arm 2, and the first water inlet 21 is located at the bottom of the water collecting chamber 23. A pump housing 5 connected to the first water inlet 21 is provided below the second spray arm 2, a second water inlet 51 is formed on the bottom wall of the pump housing 5, a first water outlet 52 corresponding to the first water inlet 21 is formed on the top wall, a water guide pipe 53 capable of guiding water in the pump housing 5 into the first spray arm 1 is tangentially connected to the side wall of the pump housing 5, and the impeller assembly 3 has a centrifugal impeller 31 capable of passing through the first water outlet 52, with the upper part located in the water collecting chamber 23 and the lower part located in the pump housing 5.

[0037] In this embodiment, the centrifugal impeller 31 is provided with a baffle 6 that can move up and down to control the water flow from the pump housing 5 into the second spray arm 2. The baffle 6 is located in the water collecting chamber 23 of the second spray arm 2 and extends along the radial direction of the centrifugal impeller 31. Specifically, Figure 4 As shown, the baffle 6 moves upward to the upper end of the centrifugal impeller 31 to generate negative pressure between the baffle 6 and the inner top wall of the second spray arm 2, as shown in FIG. Figure 5 As shown, the baffle 6 moves downward to cover the first water inlet 21 to separate the pump housing 5 from the water collecting chamber 23 of the second spray arm 2. When the upper and lower double-layer dishes are placed in the dishwasher, the baffle 6 moves to the upper end of the centrifugal impeller 31, and the centrifugal impeller 31 drives the baffle 6 to rotate during the rotation process, and a negative pressure is formed between the baffle 6 and the inner top wall of the second spray arm 2, which is conducive to increasing the suction force in the second spray arm 2 and thus increasing the water flow of the second spray arm 2, so as to eliminate the problem of small water flow of the second spray arm 2 caused by the branch water flow output below the second spray arm 2 in the prior art; when only the dishes are placed on the upper layer in the dishwasher, the baffle 6 can be moved to cover the first water inlet 21, so as to separate the pump housing 5 from the second spray arm 2, and the spray system a mainly supplies water to the first spray arm 1, and performs spray cleaning on the upper layer to meet the cleaning needs.

[0038] like Fig.10 As shown, the centrifugal impeller 31 includes a first sleeve 311 located in the center and a plurality of centrifugal blades 312 arranged at intervals on the outer periphery of the first sleeve 311, and the upper portion of each centrifugal blade 312 is located above the first sleeve 311 to form a shaft hole 314 arranged in the center of the first sleeve 311. Figure 7 , 8 As shown in Figures 9 and 10, the baffle 6 includes a second sleeve 61 located in the center and a plurality of baffles 62 arranged at intervals on the outer periphery of the second sleeve 61. The second sleeve 61 is arranged in the shaft hole 314 so as to be movable up and down, and a first gap 63 is formed between two adjacent baffles 62 for the centrifugal blades 312 to pass through. With such a structure, it is easy to achieve the coordination between the baffle 6 and the centrifugal impeller 31 during the process of moving up and down.

[0039] like Figures 6 to 10As shown, the top edge of the centrifugal blade 312 gradually tilts downward from the outer edge to the inner edge to form a first arc-shaped edge 3121, and correspondingly, the baffle 6 has an arc-shaped structure corresponding to the first arc-shaped edge 3121. Specifically, the baffle 62 has a first baffle 621 and a second baffle 622 arranged at intervals from top to bottom, the curvature of the first baffle 621 is greater than the curvature of the first arc-shaped edge 3121, and the inner end is connected to the second sleeve 61 and arranged through the second gap 313 between adjacent centrifugal blades 312, and the curvature of the second baffle 622 is consistent with the curvature of the first arc-shaped edge 3121, and the outer end is connected to the middle of the lower wall of the first baffle 621, and the inner end extends to the outer edge of the second gap 313. Such a structure is adopted to improve the sealing between the centrifugal impeller 31 and the baffle 6, and when the baffle 6 covers the first water inlet 21, it is prevented that more water still passes through the gap between the baffle 6 and the centrifugal impeller 31 and enters the second spray arm 2.

[0040] In this embodiment, if Figure 3 , 12 As shown, the driving member 4 includes a motor 41, a motor shaft 42 and a connecting rod 43. The motor 41 is arranged on the outer bottom wall of the box body 7 and the output end is connected to the motor shaft 42 which vertically passes through the bottom of the box body 7. The motor shaft 42 is connected to the centrifugal impeller 31 through a nut to drive the centrifugal impeller 31 to rotate. The motor shaft 42 is hollow inside to form a receiving tube which passes through the upper and lower parts. The connecting rod 43 can move up and down through the receiving tube and the upper end is connected to the second sleeve 61 of the baffle 6 through a nut. The baffle 6 can be driven to move up and down by moving the connecting rod 43 up and down.

[0041] The upper end of the connecting rod 43 passes through the first sleeve 61 and is fixedly connected to the second sleeve 62, and the lower end of the connecting rod 43 is connected to an electromagnetic component 44 that can drive it to move up and down. Fig.13 As shown, the electromagnetic assembly 44 includes an upper yoke plate 441, a lower iron plate 442, an iron core 443, a coil 444, and an elastic member 445. The lower end of the connecting rod 43 is connected to the iron core 443. The upper yoke plate 441 and the lower iron plate 442 are arranged at intervals up and down and correspond to the arrangement of the iron core 443 respectively. The iron core 443 can move up and down in the cavity surrounded by the upper yoke plate 441 and the lower iron plate 442. The elastic member 445 is arranged in the cavity surrounded by the upper yoke plate 441 and the lower iron plate 442, and the lower end is against the lower iron plate 442, and the upper end is against the limiting protrusion on the periphery of the iron core 443, so that the connecting rod 43 always maintains a tendency to move upward. The coil 444 is sleeved on the outer periphery of the upper yoke plate 441 and the lower iron plate 442. When the coil 444 is energized, the iron core 443 drives the connecting rod 43 to overcome the elastic force of the elastic member 445 and move downward.

[0042] In this embodiment, in order to facilitate the second spray arm 2 to be rotatably supported on the pump housing 5, as shown in FIG. Fig.11As shown, a collar 54 is arranged around the first water outlet 52 on the top wall of the pump housing 5, and correspondingly, a buckle 24 extending downward into the collar 54 and engaging with the inner bottom wall of the collar 54 is arranged on the periphery of the first water inlet 21 on the bottom wall of the second spray arm 2. The cross section of the upper wall of the collar 54 is formed into a horizontal first L-shaped structure 541, and a second L-shaped structure 25 is arranged on the lower wall of the second spray arm 2 to match the first L-shaped structure 541 to form a labyrinth-shaped gap. This structure is conducive to increasing the water flow creeping distance at the connection between the second spray arm 2 and the pump housing 5, so as to reduce the water flow leakage and avoid the local formation of a negative pressure area to inhale air, thereby ensuring the conversion of hydraulic efficiency.

[0043] A guide seat 8 for supporting the pump housing 5 is provided below the pump housing 5 of this embodiment. The guide seat 8 has support arms 81 arranged at intervals on the periphery and a guide sleeve 82 located in the central part and penetrating from top to bottom. The lower end of the support arm 81 is supported at the bottom of the drainage area 72. The upper end of the guide sleeve 82 is connected to the second water inlet 51 of the pump housing 5. The guide sleeve 82 is provided with an axial flow impeller 32 that rotates synchronously with the centrifugal impeller 31. The pump housing 5, the second spray arm 2, and the first spray arm 1 are located above the drainage plate 73. The second water inlet 51 of the pump housing 5 is connected to the drainage area 72 below the drainage plate 73.

[0044] In this embodiment, the water guide pipe 53 is in a U-shaped structure, the first vertical portion of the U-shaped water guide pipe is horizontally connected to the bottom of the second spray arm 2, the middle portion is vertically arranged, the second vertical portion is horizontally arranged above the second spray arm 2 and the water outlet end is connected to the first spray arm 1. The third water inlet 11 connected to the water guide pipe 53 is opened in the central portion of the top wall of the first spray arm 1, and the second water spray hole 12 is opened on the top wall.

[0045] This embodiment is provided with a first spray arm 1 and a second spray arm 2 for upper and lower spraying, which expands the spraying range, is conducive to eliminating cleaning dead corners, and improves the cleaning effect; the spray system a takes in water from the bottom of the pump housing 5 and discharges water from the top and sides, and the centrifugal impeller 31 simultaneously draws water to the first spray arm 1 and disperses the water flow in the second spray arm 2 circumferentially, cooperates with the structure of the pump housing 5 to stabilize the water flow of the upper and lower layers, and simplifies the overall structure.

Claims

1. A spray system, comprising a first spray arm (1), a second spray arm (2), an impeller assembly (3) and a driving member (4), wherein the first spray arm (1) and the second spray arm (2) are arranged with a spacing therebetween, the impeller assembly (3) is used to pump water below the second spray arm (2) into the first spray arm (1) and the second spray arm (2), and the driving member (4) is used to drive the impeller assembly (3) to rotate, characterized in that: A first water inlet (21) is provided on the lower wall surface of the second spray arm (2), and a first water spray hole (22) is provided on the top wall; a pump housing (5) connected to the first water inlet (21) is arranged below the second spray arm (2); a second water inlet (51) is provided on the bottom wall of the pump housing (5), and a first water outlet (52) arranged corresponding to the first water inlet (21) is provided on the top wall; a water guide pipe (53) capable of guiding water in the pump housing (5) into the first spray arm (1) is tangentially connected to the side wall of the pump housing (5); and the impeller assembly (3) comprises a centrifugal impeller (31) capable of passing through the first water outlet (52), with the upper part of the impeller being located in the second spray arm (2) and the lower part of the impeller being located in the pump housing (5); The centrifugal impeller (31) is provided with a baffle (6) that can move up and down so as to control the water flow rate entering the second spray arm (2) from the pump housing (5); the baffle (6) is located in the second spray arm (2) and extends along the radial direction of the centrifugal impeller (31); the baffle (6) moves upward to the upper end of the centrifugal impeller (31) to generate negative pressure between the baffle and the inner top wall of the second spray arm (2); the baffle (6) moves downward to cover the first water inlet (21) to separate the pump housing (5) from the second spray arm (2); The centrifugal impeller (31) comprises a first sleeve (311) located at the center and a plurality of centrifugal blades (312) arranged at intervals on the periphery of the first sleeve (311), and the upper part of each centrifugal blade (312) is located above the first sleeve (311) to form a shaft hole (314) arranged at the center of the first sleeve (311); the baffle (6) comprises a second sleeve (61) located at the center and a plurality of baffles (62) arranged at intervals on the periphery of the second sleeve (61), the second sleeve (61) is movably arranged in the shaft hole (314) up and down, and a first gap (63) is formed between two adjacent baffles (62) for the centrifugal blade (312) to pass through; the top edge of the centrifugal blade (312) gradually tilts downward from the outer edge to the inner edge to form a first arc-shaped edge (3121), and accordingly, the baffle (62) has an arc-shaped structure corresponding to the first arc-shaped edge (3121); The driving member (4) comprises a motor (41), a motor shaft (42) and a connecting rod (43); the motor (41) is arranged below the second spray arm (2) and the motor shaft (42) is connected to the output end; the motor shaft (42) is connected to the centrifugal impeller (31) so as to drive the centrifugal impeller (31) to rotate; the motor shaft (42) is hollow inside to form a receiving tube that passes through the receiving tube (431) vertically; the connecting rod (43) can pass through the receiving tube (431) so as to be movable vertically and the upper end is connected to the baffle (6); the upper end of the connecting rod (43) passes through the first shaft sleeve (311) and is fixedly connected to the second shaft sleeve (61); the lower end of the connecting rod (43) is connected to an electromagnetic component that can drive the connecting rod (43) to move vertically.

2. The spray system according to claim 1, characterized in that: The baffle (62) comprises a first baffle (621) and a second baffle (622) which are arranged in an upper and lower spaced relationship; the first baffle (621) has an arc greater than that of the first arc-shaped edge (3121), and its inner end is connected to the second sleeve (61) and is arranged to pass through the second gap (313) between adjacent centrifugal blades (312); the second baffle (622) has an arc that matches that of the first arc-shaped edge (3121), its outer end is connected to the middle of the lower wall of the first baffle (621), and its inner end extends to the outer edge of the second gap (313).

3. The spray system according to claim 1, characterized in that: The electromagnetic assembly includes a valve seat and an elastic member. The lower end of the connecting rod extends into the valve seat. The elastic member enables the connecting rod to always maintain a tendency to move upward. When the electromagnetic assembly is energized, the connecting rod overcomes the elastic force of the elastic member and moves downward.

4. The spray system according to any one of claims 1 to 3, characterized in that: A clamping ring (54) is arranged around the first water outlet (52) on the top wall of the pump housing (5); correspondingly, a buckle (24) is arranged on the periphery of the first water inlet (21) on the bottom wall of the second spray arm (2) and extends downward into the clamping ring (54) and is clamped with the inner bottom wall of the clamping ring (54).

5. The spray system according to claim 4, characterized in that: The cross-section of the upper wall surface of the clamping ring (54) is formed into a horizontally placed first L-shaped structure (541), and the lower wall surface of the second spray arm (2) is provided with a second L-shaped structure (25) corresponding to and matching the first L-shaped structure (541) to form a maze-shaped gap.

6. The spray system according to any one of claims 1 to 3, characterized in that: A flow guide seat (8) for supporting the pump housing (5) is arranged below the pump housing (5); the flow guide seat (8) comprises support arms (81) arranged at intervals on the periphery and a flow guide sleeve (82) located in the central portion and penetrating from top to bottom; the upper end of the flow guide sleeve (82) is connected to the second water inlet (51) of the pump housing (5); an axial flow impeller (32) is arranged in the flow guide sleeve (82) and rotates synchronously with the centrifugal impeller (31).

7. The spray system according to any one of claims 1 to 3, characterized in that: The water guide pipe (53) is of a U-shaped structure, wherein a first vertical portion of the water guide pipe (53) is horizontally connected below the second spray arm (2), a middle portion is vertically arranged, a second vertical portion is horizontally arranged above the second spray arm (2), and a water outlet end is connected to the first spray arm (1).

8. The spray system according to claim 7, characterized in that: The top wall of the first spray arm (1) is provided with a third water inlet (11) connected to the water guide pipe (53), and the bottom wall and / or the top wall are provided with a second water spray hole (12).

9. A cleaning machine using the spray system according to any one of claims 1 to 8, comprising a box (7) having a washing chamber (71), a concave drainage area (72) being provided at the bottom of the box (7), and a drainage plate (73) covering the top of the drainage area (72), characterized in that: The bottom of the spray system (a) is supported in the drain area (72); the pump housing (5), the second spray arm (2), and the first spray arm (1) are located above the drain plate (73); and the second water inlet (51) of the pump housing (5) is connected to the drain area (72) below the drain plate (73).

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