Cleaning machine

Abstract

The cleaning machine comprises a box body, a water pump, a first spraying piece and a second spraying piece, a water return area is arranged at the bottom of the box body, the water pump is arranged in the water return area, a water inlet of the water pump is communicated with the water return area, and the first spraying piece is arranged above the water return area and communicated with a first water outlet in the top of the water pump; the second spraying piece is arranged above the first spraying piece and communicates with a second water outlet in the side portion of the water pump, and the first spraying piece comprises an outer sleeve which is arranged on the water pump and arranged around the periphery of the first water outlet; the inner sleeve is arranged in the outer sleeve, a lower port of the inner sleeve corresponds to the first water outlet, and a plurality of spraying holes are formed in the upper end face of the inner sleeve; the first end of the brush head is rotatably connected to the upper end face of the inner sleeve; the movable ring comprises a vertical part penetrating through the space between the outer sleeve and the inner sleeve and a supporting edge located in the outer sleeve, the movable ring can be restrained between the outer sleeve and the inner sleeve in an up-and-down moving mode, and the upper edge of the vertical part pushes the brush head to change the inclination of the brush head along with up-and-down movement of the vertical part.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a washing machine for washing tableware, fruits and vegetables. Background Art

[0002] As people's living standards improve, dishwashers have gradually become a commonly used appliance in the kitchen.

[0003] At present, there are two main types of water flow systems in dishwashers: open and closed. The water pump of the open water flow system is placed in the washing chamber and directly connected to the washing chamber, while the water pump of the closed water flow system is placed outside the washing chamber and connected to the washing chamber through a pipe. The open water flow system is beneficial to reducing fluid energy loss due to the shortened return stroke, and has great advantages in water pump performance.

[0004] The applicant's prior patent ZL 201310749864.9 "Sink-type cleaning machine" discloses a cleaning machine using an open water flow system, which includes a box body forming a washing space, the box body includes a sink body, the sink body is concave at least in the central part, the concave part is covered with a drain plate of the same shape as the concave part, a plurality of drain holes for draining water are provided on the drain plate, the space between the concave part and the drain plate forms a drain area, the drain plate is flush with other parts of the bottom of the sink body, and a water pump is provided in the drain area to pump water out of the drain area to above the drain plate.

[0005] The above structure sets the water pump in the drain area of ​​the sink body, which has a good water replenishment effect on the water pump. However, since the spray arm as a water outlet component needs to be used as a part of the pump housing, that is, it cooperates with the impeller to realize water pumping and water flow distribution, and the rotation of the spray arm is driven by the viscosity of the water flow, then there must be a rotational matching relationship between the flow channel inlet of the spray arm used as part of the pump housing and the impeller, which easily leads to the impact force of the water flow on the spray arm being not stable enough, affecting the rotational stability of the spray arm. At the same time, the spray arm only sprays water through the spray hole to rinse the tableware, which has certain limitations and affects the cleaning effect. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a cleaning machine which can improve the rotation stability of the water spray component by stable water flow output and improve the cleaning effect by contact decontamination using the water spray component in response to the current status of the prior art.

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

[0008] The technical solution adopted by the present invention to solve the above technical problems is:

[0009] A cleaning machine comprises a box, a water pump, a first spraying member and a second spraying member, wherein a concave water return area is arranged at the bottom of the box, the water pump is arranged in the water return area and the water inlet is connected to the water return area, the first spraying member is arranged above the water return area and is connected to the first water outlet at the top of the water pump, the second spraying member is arranged above the first spraying member and is connected to the second water outlet at the side of the water pump, and the first spraying member comprises:

[0010] An outer sleeve, provided on the water pump and arranged around the periphery of the first water outlet;

[0011] An inner sleeve is arranged in the outer sleeve, the lower end of the inner sleeve is arranged corresponding to the first water outlet, and the upper end surface is provided with a plurality of spray holes;

[0012] A brush head, a first end of which is rotatably connected to the upper end surface of the inner sleeve;

[0013] The movable ring includes a vertical part passing through the outer sleeve and the inner sleeve and a supporting edge located inside the outer sleeve. The movable ring can be constrained between the outer sleeve and the inner sleeve so as to move up and down. The upper edge of the vertical part pushes the brush head to change its inclination as it moves up and down.

[0014] The present invention provides a first spray component that takes into account both spraying and contact friction cleaning. Compared with the existing spray arm that is completely driven by the viscosity of water flow to perform spray cleaning, the brush head of the first spray component can not only provide contact cleaning, but also change the inclination in real time with the up and down movement of the movable ring to adapt to the friction cleaning of more tableware. The change in the inclination of the brush head is achieved by the dynamic balance between the movable ring, the impact force of the water flow and the elastic component, and can achieve adaptive adjustment without setting an independent driving component. The structure is simple, easy to use, and is conducive to improving the cleaning effect.

[0015] Preferably, the first spraying member is provided with a driving structure that can drive the movable ring to move up and down to continuously change the inclination of the brush head, and the driving structure cooperates with the impact force of the water flow to achieve adaptive adjustment. With the above structure, the adaptive adjustment of the inclination of the brush head is achieved through the impact force of the water flow, which simplifies the structure and is easy to use.

[0016] Preferably, the driving structure includes an elastic member, which is arranged in the outer sleeve and connected to the supporting edge, and is used to drive the supporting edge to move downward. When the water flow impacts the elastic member and the supporting edge, the movable ring can achieve up and down reciprocating movement under the dynamic balance between the water flow impact force and the elastic force of the elastic member. The above structure is used to facilitate the adaptive adjustment of the up and down movement of the movable ring by utilizing the elastic member and the water flow impact force.

[0017] Preferably, the upper end surface of the inner sleeve is provided with a plurality of hinged arms extending in the radial direction, and the lower ends of the plurality of brush heads are rotatably connected to the corresponding hinged arms one by one, and the outer edges of the brush heads lean against the upper edges of the vertical parts of the movable rings, and the inclination of the brush heads changes as the movable rings move up and down. With the above structure, the plurality of brush heads are arranged radially on the top of the water pump, which can increase the cleaning area and improve the cleaning effect; as the movable rings move up and down, the brush heads can continuously extend radially or gather toward the middle when changing their inclinations, so as to expand the cleaning area and eliminate cleaning dead corners.

[0018] Preferably, a water outlet sleeve is provided at the central part of the upper end surface of the inner sleeve, and the brush heads are arranged around the periphery of the water outlet sleeve, and the upper end surface of the inner sleeve is provided with a plurality of spray holes located around the water outlet sleeve. This structure is conducive to expanding the spray range, eliminating cleaning dead corners, and improving the cleaning effect.

[0019] As an improvement, the water inlet of the water outlet sleeve is provided with an impeller which can drive the inner sleeve to rotate circumferentially under the impact of water flow. This structure can use the impact force of water flow to drive the brush head to rotate, so as to further eliminate cleaning dead corners and improve the cleaning effect.

[0020] In order to facilitate assembly and connection, a support arm extending radially is provided at the lower end of the inner sleeve, and a water guide sleeve extending upward around the first water outlet is provided at the top of the water pump, and the support arm is rotatably constrained on the water guide sleeve.

[0021] In the present invention, a mounting opening is provided at the top of the outer sleeve, the vertical portion of the movable ring passes through the mounting opening so that the lower end support edge is located in the outer sleeve, the outer edge of the support edge is close to the inner wall of the outer sleeve, the inner sleeve passes through the middle part of the movable ring and is located in the outer sleeve, and the lower end of the inner sleeve is arranged corresponding to the middle part of the outer sleeve, the outer side wall of the vertical portion of the movable ring is arranged close to the peripheral wall of the mounting opening, and the inner side wall of the vertical portion of the movable ring is arranged close to the outer wall of the inner sleeve.

[0022] The water pump of the present invention comprises:

[0023] The pump housing has a water inlet at the bottom, a first water outlet at the top, and a second water outlet at the side;

[0024] A spatial guide vane, comprising a cover plate and a guide vane, wherein the cover plate is transversely arranged in the middle of the pump housing and divides the inner cavity of the pump housing into a relatively independent upper cavity and a lower cavity, wherein the first water outlet is connected to the upper cavity, and the second water outlet is connected to the lower cavity; the guide vanes are multiple and vertically arranged on the lower surface of the cover plate, wherein the multiple guide vanes cover the circumferential area of ​​the cover plate and are arranged at intervals along the circumference, wherein the guide vanes spirally extend inward from the edge of the cover plate in the opposite direction of the water flow, and a guide channel is constrained between two adjacent guide vanes, and the cover plate portion corresponding to the top of the guide vane is at least partially missing to form a gap for connecting the water channel with the upper cavity;

[0025] The impeller is rotatably arranged in the lower cavity. The bottom of the impeller is provided with an inlet arranged corresponding to the water suction port, and the side is provided with an outlet arranged corresponding to the guide vane, which is used to synchronously draw water flow to the first water outlet and the second water outlet.

[0026] The present invention provides a spatial guide vane and an impeller in the pump casing for axially guiding and pressurizing the axially incoming water and then outputting it axially to meet the water pressure requirement. On this basis, the first spray piece is arranged on the pump casing without the need to cooperate with the impeller, thereby improving the stability of the water flow entering the first spray piece and thus improving the rotational stability of the first spray piece. At the same time, since the impeller no longer corresponds to the water inlet of the first spray piece, the water pressure at the water inlet of the first spray piece is stabilized, thereby avoiding the problems of gas inhalation and water leakage.

[0027] Preferably, the second spraying member is a spraying arm located in the middle of the box body and used for spraying upwards, and a vertically extending inner water pipe is provided at the side wall of the box body, the lower end of the inner water pipe is connected to the second water outlet of the water pump, and the upper end of the inner water pipe is connected to the spraying arm. The above structure is adopted to realize two-way stable water supply by using an open water pump.

[0028] Compared with the prior art, the advantages of the present invention are: the present invention provides a first spray component that takes into account both spraying and contact friction cleaning. Compared with the existing spray arm that is completely driven by the viscosity of the water flow to perform spray cleaning, the brush head of the first spray component can not only provide contact cleaning, but also change the inclination in real time with the up and down movement of the movable ring to adapt to the friction cleaning of more tableware. The change in the inclination of the brush head is achieved by the dynamic balance between the movable ring, the impact force of the water flow and the elastic part, and can achieve adaptive adjustment without setting an independent driving component. The structure is simple, easy to use, and is conducive to improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a cleaning machine according to an embodiment of the present invention;

[0030] Figure 2 It is an assembly diagram of the first spraying member and the water pump in an embodiment of the present invention;

[0031] Figure 3 for Figure 2 Schematic diagram of the bottom structure;

[0032] Figure 4 for Figure 2 Partial exploded view of

[0033] Figure 5 for Figure 4 Another angle view;

[0034] Figure 6 for Figure 2 sectional view of . DETAILED DESCRIPTION

[0035] The present invention is further described in detail below with reference to the accompanying drawings.

[0036] like Figures 1 to 6 As shown, the cleaning machine of this embodiment includes a housing 1, a water pump 2, a first spraying member 3 and a second spraying member 4. A concave water return area 11 is provided at the bottom of the housing 1, and a filter plate 12 is covered on the top of the water return area 11. The water pump 2 is arranged in the water return area 11 and the water inlet is connected to the water return area 11. The first spraying member 3 is arranged above the water return area 11 and is connected to the first water outlet 21 at the top of the water pump 2. The second spraying member 4 is arranged above the first spraying member 3 and is connected to the second water outlet 22 at the side of the water pump 2.

[0037] The first spray element 3 of this embodiment includes:

[0038] The outer sleeve 31 is provided on the water pump 2 and is arranged around the outer periphery of the first water outlet 21;

[0039] The inner sleeve 32 is disposed in the outer sleeve 31, the lower end of the inner sleeve 32 is arranged corresponding to the first water outlet 21, and the upper end surface is provided with a plurality of spray holes 321;

[0040] A brush head 33, a first end of which is rotatably connected to the upper end surface of the inner sleeve 32;

[0041] The movable ring 34 includes a vertical portion 341 passing through the outer sleeve 31 and the inner sleeve and a support edge 342 located inside the outer sleeve 31. The movable ring 34 can be constrained between the outer sleeve 31 and the inner sleeve 32 to move up and down. The upper edge of the vertical portion 341 pushes the brush head 33 to change its inclination as it moves up and down.

[0042] The first spraying member 3 is provided with a driving structure that can drive the movable ring 34 to move up and down to continuously change the inclination of the brush head 33. The driving structure cooperates with the impact force of the water flow to achieve adaptive adjustment. With the above structure, the inclination of the brush head 33 is adaptively adjusted by the impact force of the water flow, which simplifies the structure and is easy to use.

[0043] The driving structure includes an elastic member 35, which is arranged in the outer sleeve 31 and connected to the support edge 342, and is used to drive the support edge 342 to move downward. The elastic member 35 of this embodiment is a spring, which is in a compressed state. In the natural state, it provides a downward pulling force for the support edge 342. When the water flow impacts the elastic member 35 and the support edge 342, the movable ring 34 can achieve up and down reciprocating movement under the dynamic balance between the water flow impact force and the elastic force of the elastic member 35. With the above structure, it is convenient to use the elastic member 35 and the water flow impact force to achieve adaptive adjustment of the up and down movement of the movable ring 34.

[0044] The upper end surface of the inner sleeve 32 is provided with a plurality of hinged arms 322 extending in the radial direction, and the lower ends of the plurality of brush heads 33 are rotatably connected to the corresponding hinged arms 322 one by one, and the outer edge of the brush head 33 leans against the upper edge of the vertical portion 341 of the movable ring 34, and the inclination of the brush head 33 changes with the up and down movement of the movable ring 34. With the above structure, the plurality of brush heads 33 are radially arranged on the top of the water pump 2, which can increase the cleaning area and improve the cleaning effect; as the movable ring 34 moves up and down, the brush head 33 can continuously extend radially or gather toward the middle when changing the inclination, so as to expand the cleaning area and eliminate the cleaning dead angle.

[0045] A water outlet sleeve 323 is provided at the central part of the upper end surface of the inner sleeve 32, and each brush head 33 is arranged around the periphery of the water outlet sleeve 323. The upper end surface of the inner sleeve 32 is provided with a plurality of spray holes 321 located at the periphery of the water outlet sleeve 323. This structure is conducive to expanding the spray range, eliminating cleaning dead corners, and improving the cleaning effect.

[0046] The water inlet of the water outlet sleeve 323 is provided with an impeller 5 which can drive the inner sleeve 32 to rotate circumferentially under the impact of water flow. This structure can use the impact force of water flow to drive the brush head 33 to rotate, so as to further eliminate the cleaning dead angle and improve the cleaning effect.

[0047] To facilitate assembly and connection, a radially extending support arm 324 is provided at the lower end of the inner sleeve 32 , and a water guide sleeve 23 extending upward around the first water outlet 21 is provided at the top of the water pump 2 , on which the support arm 324 is rotatably constrained.

[0048] In this embodiment, a mounting opening 311 is opened at the top of the outer sleeve 31, and the vertical portion 341 of the movable ring 34 passes through the mounting opening 311 so that the lower end support edge is located in the outer sleeve 31, and the outer edge of the support edge is close to the inner wall of the outer sleeve 31. The inner sleeve 32 passes through the middle part of the movable ring 34 and is located in the outer sleeve 31, and the lower end of the inner sleeve 32 is arranged corresponding to the middle part of the outer sleeve 31, the outer side wall of the vertical portion 341 of the movable ring 34 is arranged close to the peripheral wall of the mounting opening 311, and the inner side wall of the vertical portion 341 of the movable ring 34 is arranged close to the outer wall of the inner sleeve 32.

[0049] The water pump 2 of this embodiment includes:

[0050] The pump housing 24 has a water inlet 241 at the bottom, a first water outlet 21 at the top, and a second water outlet 22 at the side;

[0051] The space guide vane 25 comprises a cover plate 251 and a guide vane 252. The cover plate 251 is transversely arranged in the middle of the pump housing 24 and divides the inner cavity of the pump housing 24 into a relatively independent upper cavity 201 and a lower cavity 202. The first water outlet 21 is connected to the upper cavity 201, and the second water outlet 22 is connected to the lower cavity 202. There are multiple guide vanes 252 and they are vertically arranged on the lower surface of the cover plate 251. The multiple guide vanes 252 cover the circumferential area of ​​the cover plate 251 and are arranged at intervals along the circumference. The guide vanes 252 spirally extend inward from the edge of the cover plate 251 against the direction of water flow. A guide channel 253 is constrained between two adjacent guide vanes 252. The portion of the cover plate 251 corresponding to the top of the guide vane 252 is at least partially missing to form a gap 203 for connecting the water channel with the upper cavity 201.

[0052] The centrifugal impeller 26 is rotatably disposed in the lower cavity 202 . The bottom of the centrifugal impeller 26 is provided with an inlet corresponding to the water suction port 241 , and the side is provided with an outlet corresponding to the guide vane 252 , which is used to synchronously draw water flow to the first water outlet 21 and the second water outlet 22 .

[0053] In this embodiment, a space guide vane 25 and a centrifugal impeller 26 are provided in the pump housing 24 for axially guiding and pressurizing the axially incoming water and then outputting it axially to meet the water pressure requirement. On this basis, the first spray member 3 is arranged on the pump housing 24 without the need to cooperate with the centrifugal impeller 26, thereby improving the stability of the water flow entering the first spray member 3 and thus improving the rotation stability of the first spray member 3. At the same time, since the centrifugal impeller 26 no longer corresponds to the water inlet of the first spray member 3, the water pressure at the water inlet of the first spray member 3 is stabilized, thereby avoiding the problems of gas suction and water leakage.

[0054] The second spraying member 4 is a spraying arm located in the middle of the box body 1 and used for spraying upwards. A vertically extending inner water pipe 6 is provided at the side wall of the box body 1. The lower end of the inner water pipe 6 is connected to the second water outlet 22 of the water pump 2, and the upper end of the inner water pipe 6 is connected to the spraying arm. The above structure is adopted to use an open water pump 2 to realize two-way stable water supply.

[0055] A motor is disposed at the bottom of the housing 1 , the output shaft of which passes through the bottom wall of the housing and is connected to the centrifugal impeller 26 .

[0056] The cleaning method of this embodiment can control the water flow rates in two ways by adjusting the power of the above-mentioned motor. During the water outlet process of the first water outlet 21, the elastic member cooperates with the impact force of the water flow to realize the adaptive up and down movement of the movable ring, thereby driving the inclination of the brush head to continuously change and scrub the tableware in various places. At the same time, the water column sprayed from the spray hole cooperates with the brush head to perform spray cleaning.

[0057] The present embodiment provides a first spray component 3 that takes into account both spraying and contact friction cleaning. Compared with the existing spray arm that is completely driven by the viscosity of water flow to perform spray cleaning, the brush head 33 of the first spray component 3 can not only provide contact cleaning, but also change the inclination in real time with the up and down movement of the movable ring 34 to adapt to the friction cleaning of more tableware. The change in the inclination of the brush head 33 is achieved by the dynamic balance between the movable ring 34, the impact force of the water flow and the elastic component 35, and can achieve adaptive adjustment without setting an independent driving component. The structure is simple, easy to use, and is conducive to improving the cleaning effect.

[0058] 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 cleaning machine, comprising a box, a water pump, a first spray element and a second spray element, wherein a concave water return area is provided at the bottom of the box, the water pump is provided in the water return area and the water inlet is connected to the water return area, the first spray element is provided above the water return area and is connected to the first water outlet at the top of the water pump, the second spray element is provided above the first spray element and is connected to the second water outlet at the side of the water pump, characterized in that: The first spray element comprises An outer sleeve, provided on the water pump and arranged around the periphery of the first water outlet; An inner sleeve is arranged in the outer sleeve, the lower end of the inner sleeve is arranged corresponding to the first water outlet, and the upper end surface is provided with a plurality of spray holes; A brush head, a first end of which is rotatably connected to the upper end surface of the inner sleeve; The movable ring includes a vertical part passing through the outer sleeve and the inner sleeve and a supporting edge located inside the outer sleeve. The movable ring can be constrained between the outer sleeve and the inner sleeve so as to move up and down. The upper edge of the vertical part pushes the brush head to change its inclination as it moves up and down.

2. The cleaning machine according to claim 1, characterized in that: The first spraying member is provided with a driving structure capable of driving the movable ring to move up and down reciprocatingly so as to continuously change the inclination of the brush head. The driving structure realizes adaptive adjustment in coordination with the impact force of the water flow.

3. The cleaning machine according to claim 2, characterized in that: The driving structure includes an elastic member, which is arranged in the outer sleeve and connected to the support edge, and is used to drive the support edge to move downward. When the water flow impacts the elastic member and the support edge, the movable ring realizes up and down reciprocating movement under the dynamic balance of the water flow impact force and the elastic force of the elastic member.

4. The cleaning machine according to claim 2, characterized in that: The upper end surface of the inner sleeve is provided with a plurality of hinged arms extending in the radial direction, and the lower ends of the plurality of brush heads are rotatably connected to the corresponding hinged arms one by one, and the outer edges of the brush heads lean against the upper edge of the vertical part of the movable ring, and the inclination of the brush heads changes with the up and down movement of the movable ring.

5. The cleaning machine according to claim 4, characterized in that: A water outlet sleeve is arranged at the central part of the upper end surface of the inner sleeve, and the brush heads are arranged around the periphery of the water outlet sleeve. The upper end surface of the inner sleeve is provided with a plurality of spray holes located at the periphery of the water outlet sleeve.

6. The cleaning machine according to claim 5, characterized in that: An impeller is arranged at the water inlet of the water outlet sleeve, which can drive the inner sleeve to rotate circumferentially under the impact of water flow.

7. The cleaning machine according to claim 6, characterized in that: A support arm extending in the radial direction is arranged at the lower end of the inner sleeve, and a water guide sleeve extending upward around the first water outlet is arranged at the top of the water pump, and the support arm is rotatably constrained on the water guide sleeve.

8. The cleaning machine according to any one of claims 1 to 7, characterized in that: A mounting opening is provided at the top of the outer sleeve, and the vertical portion of the movable ring passes through the mounting opening so that the lower end support edge is located in the outer sleeve, and the outer edge of the support edge is close to the inner wall of the outer sleeve. The inner sleeve passes through the middle part of the movable ring and is located in the outer sleeve, and the lower end of the inner sleeve is arranged corresponding to the middle part of the outer sleeve, the outer side wall of the vertical portion of the movable ring is arranged close to the peripheral wall of the mounting opening, and the inner side wall of the vertical portion of the movable ring is arranged close to the outer wall of the inner sleeve.

9. The cleaning machine according to any one of claims 1 to 7, characterized in that: The water pump comprises The pump housing has a water inlet at the bottom, a first water outlet at the top, and a second water outlet at the side; A spatial guide vane, comprising a cover plate and a guide vane, wherein the cover plate is transversely arranged in the middle of the pump housing and divides the inner cavity of the pump housing into a relatively independent upper cavity and a lower cavity, wherein the first water outlet is connected to the upper cavity, and the second water outlet is connected to the lower cavity; the guide vanes are multiple and vertically arranged on the lower surface of the cover plate, wherein the multiple guide vanes cover the circumferential area of ​​the cover plate and are arranged at intervals along the circumference, wherein the guide vanes spirally extend inward from the edge of the cover plate in the opposite direction of the water flow, and a guide channel is constrained between two adjacent guide vanes, and the cover plate portion corresponding to the top of the guide vane is at least partially missing to form a gap for connecting the water channel with the upper cavity; The impeller is rotatably arranged in the lower cavity. The bottom of the impeller is provided with an inlet arranged corresponding to the water suction port, and the side is provided with an outlet arranged corresponding to the guide vane, which is used to synchronously draw water flow to the first water outlet and the second water outlet.

10. The cleaning machine according to any one of claims 1 to 7, characterized in that: The second spray part is a spray arm located in the middle of the box body and used for spraying upwards. A vertically extending inner water pipe is provided on the side wall of the box body. The lower end of the inner water pipe is connected to the second water outlet of the water pump, and the upper end of the inner water pipe is connected to the spray arm.

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