A cleaning machine

Abstract

The present application relates to a kind of cleaning machines, including sink body, the bottom of sink body is provided with lower water outlet and the lower water cavity connected below lower water outlet, also including backwater pipe, check valve, bowl rack, spray arm, the bottom of sink body is opened with backwater mouth in the side of lower water outlet, backwater pipe is used to connect lower water cavity with backwater mouth.The present application is provided with backwater mouth and backwater pipe in the bottom of sink body, when needing to use sink body as dishwasher, lower water cavity is used as backwater cavity, water in lower water cavity is returned to spray arm and sprayed through backwater pipe, backwater mouth, when needing to use sink body as ordinary sink, water in lower water cavity is directly discharged into sewer, it is convenient to switch between dishwasher and ordinary sink, convenient to use;Compared with the existing ordinary sink, the change in sink body is only to set backwater mouth, overall structure is simple, and the cost of modification is low;Spray arm is communicated with backwater mouth by bowl rack and is pressed, and it is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of dishwasher technology, specifically to a cleaning machine. Background Technology

[0002] Currently, most kitchens have two sinks. If a sink-type dishwasher is installed, one sink is used as a regular sink, and the other is used as the dishwasher's washing tub. The washing tub has a spray system installed and cannot be used as a regular sink.

[0003] The applicant's earlier application CN202010900533.0, "A Washing Basket and a Sink with the Washing Basket," discloses a structure that allows the sink to be used as a dishwasher or as a regular sink. The washing basket includes a basket body with a washing chamber. The basket body has a flow channel extending from the bottom to the side. Spray holes are formed on the inner wall of the basket body for water to be sprayed out of the flow channel. A recessed circular water-drawing area is provided at the bottom of the basket body, which is connected to the flow channel. An impeller is provided in the water-drawing area to pump water from the bottom of the basket body into the flow channel. In use, the impeller rotates, drawing water from the bottom of the basket into the flow channel on the side of the basket, and further spraying the fruits, vegetables, or dishes in the basket through the spray holes. The washing basket and sink are easily integrated; placing the basket in the sink and closing the lid allows it to be used as an automatic dishwasher. When not needed, the basket is removed from the sink along with the lid, allowing it to be used as a regular sink.

[0004] The above structure is very convenient when switching between a dishwasher and a regular sink. However, when used as a dishwasher, it requires a specially structured cleaning basket and a complex drive mechanism installed at the bottom of the sink. The overall structure is complex and the production cost is high. At the same time, when using the cleaning basket, the water flow system inside the basket is independent of the sink, making it difficult to filter and collect residue, resulting in inconvenient residue removal. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a cleaning machine that integrates a water return system while retaining the original sink shape, thereby simplifying the overall structure, reducing costs, and facilitating switching between dishwashers and ordinary sinks.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning machine that facilitates filtration and slag collection, in light of the current state of the prior art.

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

[0008] A cleaning machine includes a water tank body, the bottom of which is provided with a drain outlet and a drain cavity connected below the drain outlet, and further includes:

[0009] The water return pipe has a water return port located next to the drain outlet at the bottom of the water tank body. The water return pipe is located outside the water tank body and is used to connect the drain cavity and the water return port.

[0010] A one-way valve is provided at the return water inlet and can open the return water inlet under water flow impact and close the return water inlet when there is no water flow impact;

[0011] A dish rack, used to hold tableware or fruits and vegetables;

[0012] A spray arm is located at the bottom of the dish rack. The bottom of the spray arm has a water inlet. When the dish rack is placed in the sink body, the water inlet of the spray arm is connected to the water return port. When the dish rack is removed from the sink body, the water return port is kept closed by a one-way valve.

[0013] Preferably, the one-way valve includes a first cover and a second cover that can be mated together. The outer edge of the first cover is rotatably connected to the inner edge of the return water inlet, and the outer edge of the second cover is rotatably connected to the inner edge of the return water inlet and is arranged opposite to the first cover. Under the impact of water flow, the first cover and the second cover flip upward relative to each other, and the angle of their flipping is less than 90 degrees. A connecting shaft is provided on the outer edge of each of the first and second covers. Correspondingly, a shaft hole is provided on the inner edge of the return water inlet. The first cover and the second cover are rotatably engaged with the inner edge of the return water inlet via the connecting shaft and the shaft hole. Under the impact of water flow, the first cover and the second cover flip upward, allowing water in the return water pipe to flow into the spray arm. Since the angle of the first cover and the second cover themselves is less than 90 degrees, they can close the return water inlet by their own gravity when there is no water flow impact. The structure is simple and the cost is low.

[0014] Preferably, the return water pipe includes an upper vertical section and a horizontal section connected to the lower end of the vertical section. The inner diameter of the vertical section gradually decreases from bottom to top to form a conical guide section, and the diameter of the upper end of the conical guide section matches the diameter of the return water inlet. This structure helps to reduce energy loss, increase water pressure, and thus improve the spray cleaning effect.

[0015] The cleaning machine of the present invention also includes a guide sleeve and an elastic element. At least a portion of the guide sleeve is vertically extendable and retractable at the bottom of the spray arm and has an upper port corresponding to the water inlet. The elastic element ensures that the guide sleeve always maintains a downward extending tendency. This structure makes the connection between the spray arm and the return water inlet and return water pipe more reliable during use, avoiding water leakage problems due to improper installation.

[0016] Preferably, the bottom of the dish rack is provided with a support leg to allow it to stand upright. When the support leg is suspended, the lower end of the flow guide sleeve is lower than the lower end of the support leg. When the support leg is supported on the table surface, the flow guide sleeve partially contracts so that its lower end is at the same height as the lower end of the support leg. This structure facilitates support when the dish rack is used alone, improving its stability.

[0017] For ease of assembly and connection, the guide sleeve includes an upper guide sleeve and a lower guide sleeve. The upper guide sleeve is rotatably connected to the spray arm. The lower guide sleeve is constrained to move up and down at the lower part of the upper guide sleeve. The elastic element is provided between the upper and lower guide sleeves and ensures that the lower guide sleeve always maintains a downward moving trend.

[0018] Preferably, the bottom wall of the spray arm is provided with an assembly ring extending downward around the water inlet, and the upper end of the upper guide sleeve is inserted and connected to the assembly ring. A first support platform is provided on the outer peripheral wall of the upper guide sleeve near the upper port to support the bottom of the assembly ring. The top wall of the spray arm has spray holes with different spray directions. This structure facilitates the rotation of the spray arm under the influence of water flow.

[0019] Preferably, the upper end of the upper guide sleeve is provided with upwardly extending support ribs at intervals, and a support platform is provided at the top of the support ribs. The top wall of the spray arm has an installation port that can cooperate and connect with the support platform, allowing the support platform to protrude from the top of the spray arm. The support platform is constrained to the bottom of the dish rack by an assembly. With the above structure, the spray arm can be constrained to the bottom of the dish rack while allowing the spray arm to rotate relative to the dish rack.

[0020] To facilitate the restraint of the spray arm at the bottom of the dish rack, the upper surface of the support platform is provided with an upwardly extending assembly. Correspondingly, the assembly has a plug-in sleeve that can be inserted into the assembly from top to bottom. The side wall of the assembly has a snap-fit ​​interface, and the outer peripheral wall of the plug-in sleeve has a protrusion that engages with the snap-fit ​​interface. Preferably, the assembly also has an outer sleeve that surrounds the assembly and the mounting opening. The outer peripheral wall of this outer sleeve has outwardly extending hooks, and the bottom of the dish rack has a mounting strip for the hooks to hold within it.

[0021] Preferably, the upper guide sleeve includes a first inner sleeve and a first outer sleeve arranged at intervals, wherein the top of the first inner sleeve and the first outer sleeve are closed and the bottom of the first outer sleeve are open, and the lower guide sleeve is movably inserted between the first outer sleeve and the first outer sleeve. This structure is beneficial for providing a relatively closed cavity for the installation of the elastic element, improving assembly compactness.

[0022] To facilitate assembly, the side wall of the first outer sleeve is provided with a vertically extending limiting installation groove, and the side wall of the lower guide sleeve is provided with an elastic buckle that can guide and cooperate with the limiting installation groove and be constrained in the limiting installation groove.

[0023] Preferably, a slag collection basket is provided in the drain chamber. When the spray arm and the return water inlet are connected, the drain chamber constitutes a return water chamber for the spray arm's water supply. This invention allows for an appropriately larger drain chamber. While retaining the original water tank shape, the slag collection basket can be used as both a filter screen and for slag collection, serving two purposes in one, simplifying the overall structure and making it easy to use.

[0024] Preferably, the bottom of the drain chamber is further provided with a drainage mechanism for quickly draining the water in the drain chamber, and a drain outlet is provided at the bottom of the drain chamber. The upper end of the drainage mechanism is connected to the drain outlet. This structure facilitates rapid water drainage and ensures that the sink body is free of residual water and remains clean.

[0025] Preferably, a heating element for heating the water passing through the drain cavity is provided in the drain cavity and / or on its outer peripheral wall. More preferably, a thick-film heating element for heating the water passing through the drain cavity is covered on the outer peripheral wall of the drain cavity. When the water tank body is used as a cleaning machine, the above structure can quickly heat the return water, thereby improving the heating effect; and, due to the use of a thick-film heating element covering the outer peripheral wall of the drain cavity, it is beneficial to improve heating efficiency and reduce heat loss; the heating element also heats the slag collection basket, which can also keep the slag collection basket dry and hygienic, sterilize and disinfect, and prevent bacterial growth.

[0026] In this invention, the lower water chamber and the return water pipe are connected by a return water drive mechanism, thereby providing power for the spray arm to spray water jets.

[0027] Preferably, the water return drive mechanism is a water pump, and a water guide pipe is arranged laterally on the side of the lower water chamber and connected to the water inlet of the water pump. The water outlet of the water pump is located at its top and connected to the lower end of the water return pipe.

[0028] Preferably, the first end of the water guide pipe is tangentially connected to the side of the lower water chamber, and the second end is connected to the water inlet of the water pump. This structure helps to reduce energy loss.

[0029] Preferably, the water guide pipe includes a first section, a second section, and a third section connected sequentially along the water flow direction, with their diameters gradually increasing. The inner portion of the first section is formed on the inner wall of the drain cavity and communicates with the drain cavity, while the outer portion protrudes outside the drain cavity. The second section is a tapered section with a gradually increasing inner diameter, and the portion near the water inlet is integrally formed with the drain cavity. The third section is a straight cylindrical section. This structure helps to accelerate the return water speed.

[0030] Preferably, the inner portion of the first section and the water inlet portion of the second section of the water guide pipe are arranged corresponding to the sidewall of the slag collection basket. A water inlet pipe is also connected to the sidewall of the lower water chamber, tangentially connected to the lower water chamber. Furthermore, the connection between the water inlet pipe and the lower water chamber is opposite to the connection between the water guide pipe and the lower water chamber, with the flow direction opposite. This creates opposing vortices during the water intake and return processes. On one hand, the formation of these vortices helps improve the efficiency of water intake and return; on the other hand, the slag collection basket placed inside the water cup is self-cleaning due to the scouring effect of the two opposing vortices.

[0031] Preferably, the slag collection basket is a cylindrical structure with a closed bottom and an open top, and the diameter of the slag collection basket gradually decreases from top to bottom. This structure helps to lock the residue at the bottom of the slag collection basket, improving the slag collection efficiency.

[0032] Preferably, the inner bottom wall of the water tank body is provided with a detachable end cap that can open or close the upper port of the drain chamber. When not in use, the drain outlet is closed to prevent odors from overflowing from the drain pipe.

[0033] Preferably, the inner bottom wall of the water tank body is provided with a partially recessed guide area surrounding the drain outlet. This structure helps to improve the sludge collection effect and the return water speed.

[0034] Compared with the prior art, the advantages of the present invention are as follows: The present invention provides a return water inlet and a return water pipe at the bottom of the sink body. When the sink body needs to be used as a dishwasher, the dish rack and its accompanying spray arm are placed into the sink body, and the lower water chamber is used as a return water chamber. With the impact of water flow, the one-way valve opens, and the water in the lower water chamber flows back to the spray arm through the return water pipe and the return water inlet. When the sink body needs to be used as a regular sink, the dish rack and its accompanying spray arm are removed, the one-way valve closes the return water inlet, and the water in the lower water chamber is directly discharged into the drain pipe, which facilitates switching between dishwasher and regular sink use and is convenient to use. Furthermore, compared with existing regular sinks, the only modification to the sink body of the present invention is the addition of a return water inlet, resulting in a simple overall structure and low modification cost. The way the spray arm, dish rack, and return water inlet work together is convenient to operate. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention (showing the dishwasher in use);

[0036] Figure 2 This is a structural schematic diagram of an embodiment of the present invention (in the form of a regular water tank).

[0037] Figure 3 This is a schematic diagram of the structure of an embodiment of the present invention (in an unused state);

[0038] Figure 4 This is a schematic diagram of the structure of an embodiment of the present invention;

[0039] Figure 5 for Figure 4 A structural diagram from another angle;

[0040] Figure 6 for Figure 1 A sectional view;

[0041] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0042] Figure 8 This is an assembly diagram of the bowl rack and spray arm in an embodiment of the present invention;

[0043] Figure 9 This is a schematic diagram of the spray arm in an embodiment of the present invention;

[0044] Figure 10 This is a schematic diagram of the lower water cavity portion in an embodiment of the present invention;

[0045] Figure 11 for Figure 10 Another angle of the image. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] like Figures 1-11 As shown, the cleaning machine in this embodiment includes a water tank body 1, a return water pipe 14, a one-way valve 5, a dish rack 100, and a spray arm 4.

[0048] The bottom of the water tank body 1 is provided with a drain outlet 11 and a drain cavity 12 connected below the drain outlet 11. A slag collection basket 2 is provided in the drain cavity 12, and a drain outlet 121 is provided at the bottom of the drain cavity 12.

[0049] like Figure 4 , 6As shown, the bottom of the aforementioned sink body 1 is also provided with a return water inlet 13 and a return water pipe 14 connected below the return water inlet 13. The return water pipe 14 is located outside the sink body 1, and the lower water chamber 12 and the return water pipe 14 are connected by a return water drive mechanism 3. When the sink body 1 needs to be used as a dishwasher, the lower water chamber 12 is used as a return water chamber. The return water drive mechanism 3 pumps the water filtered by the slag collection basket 2 in the lower water chamber 12 back to the sink body 1 through the return water pipe 14 and the return water inlet 13. When the sink body 1 needs to be used as a regular sink, the water in the lower water chamber 12 after filtration and slag collection is directly discharged into the drain pipe through the drain outlet 121, which facilitates switching between dishwasher and regular sink use and is convenient to use. Moreover, compared with the existing regular sink, the modification in the sink body 1 of this embodiment is only the opening of the return water inlet 13, which makes the overall structure simple and the modification cost low. In order to meet the requirements of the return water chamber, the lower water chamber 12 can be appropriately enlarged to facilitate filtration and slag collection.

[0050] like Figure 6 , 7 As shown, in this embodiment, the one-way valve 5 is located at the return water inlet 13 and can open the return water inlet 13 under water flow impact and close the return water inlet 13 when there is no water flow impact. The dish rack 100 is used to hold tableware or fruits and vegetables. The spray arm 4 is located at the bottom of the dish rack 100. The bottom of the spray arm 4 has a water inlet 41 and the top has a spray hole 42. When the dish rack 100 is placed in the sink body 1, the water inlet 41 of the spray arm 4 is connected to the return water inlet 13. When the dish rack 100 is removed from the sink body 1, the return water inlet 13 is kept closed by the one-way valve 5.

[0051] The aforementioned one-way valve 5 includes a first cover 51 and a second cover 52 that can be mated together. The outer edge of the first cover 51 is rotatably connected to the inner edge of the return port 13, and the outer edge of the second cover 52 is rotatably connected to the inner edge of the return port 13 and is arranged opposite to the first cover 51. Under the impact of water flow, the first cover 51 and the second cover 52 flip upward relative to each other, and the angle of their flipping is less than 90 degrees. The outer edges of the first cover 51 and the second cover 52 are respectively provided with connecting shafts, and correspondingly, the inner edge of the return port 13 is provided with shaft holes. The first cover 51 and the second cover 52 are rotatably engaged with the inner edge of the return port 13 through the connecting shafts and shaft holes. Under the impact of water flow, the first cover 51 and the second cover 52 flip up, allowing water in the return pipe 14 to flow into the spray arm 4. Since the first cover 51 and the second cover 52 themselves flip up at an angle of less than 90 degrees, they can close the return port by their own gravity when there is no water flow impact. The structure is simple and the cost is low.

[0052] In this embodiment, the return water pipe 14 includes a vertical portion 141 at the top and a horizontal portion 142 connected to the lower end of the vertical portion 141. The vertical portion 141 is very short, and its inner diameter gradually decreases from bottom to top to form a tapered guide section 1411. The diameter of the upper end of the tapered guide section 1411 matches the diameter of the return water inlet 13. This structure helps to reduce energy loss, increase water pressure, and thus improve the spray cleaning effect.

[0053] In this embodiment, with the spray arm 4 and the return water inlet 13 connected, the lower water chamber 12 serves as the return water chamber for the water supplied by the spray arm 4. In this embodiment, the lower water chamber 12 can be appropriately enlarged to facilitate filtration and sludge collection while retaining the original water tank shape.

[0054] like Figure 4 As shown, in this embodiment, the return water drive mechanism 3 is a water pump. A horizontally arranged water guide pipe 122 is provided on the side of the lower water chamber 12 and connected to the water inlet of the water pump 3. The water outlet of the water pump is located at its top and connected to the lower end of the return water pipe 14. The return water pipe 14 is L-shaped, and the upper section arranged vertically is very short.

[0055] like Figure 10 , 11 As shown, the first end of the aforementioned water guide pipe 122 is tangentially connected to the side of the drain chamber 12, and the second end is connected to the inlet of the water pump. Specifically, the water guide pipe 122 includes a first section 1221, a second section 1222, and a third section 1223, which are connected sequentially along the water flow direction and have gradually increasing diameters. The inner part of the first section 1221 is formed on the inner wall of the drain chamber 12 and is continuous with the drain chamber 12, while the outer part protrudes outside the drain chamber 12. The second section 1222 is a tapered section with a gradually increasing inner diameter, and the part near the inlet end is integrally formed with the drain chamber 12. The third section 1223 is a straight cylindrical section. This structure is beneficial for accelerating the return water speed.

[0056] The inner portion of the first section 1221 and the water inlet portion of the second section 1222 of the aforementioned water guide pipe 122 are arranged corresponding to the side wall of the slag collection basket 2. A water inlet pipe 16 is also connected to the side wall of the lower water chamber 12. This water inlet pipe 16 is tangentially connected to the lower water chamber 12, and the connection between the water inlet pipe 16 and the lower water chamber 12 is opposite to the connection between the water guide pipe 122 and the lower water chamber 12, with the flow direction opposite. This structure allows for flushing of both sides of the slag collection basket 2 during water intake and return processes, thereby maintaining the cleanliness of the slag collection basket 2.

[0057] In this embodiment, the slag collection basket 2 is a cylindrical structure with a closed bottom and an open top, and the diameter of the slag collection basket 2 gradually decreases from top to bottom. This structure helps to lock the residue at the bottom of the slag collection basket 2, improving the slag collection effect. Figure 3As shown, the inner bottom wall of the water tank body 1 is equipped with a detachable end cap 6 that allows the upper port of the drain chamber 12 to be opened or closed. When not in use, the drain outlet 11 is closed to prevent odors from overflowing from the drain pipe. The inner bottom wall of the water tank body 1 is provided with a partially recessed guide area 111 surrounding the drain outlet 11. This structure helps to improve the sludge collection effect and the return water speed.

[0058] In this embodiment, the bottom of the lower water chamber 12 is also provided with a drainage mechanism 7 for quickly draining the water in the lower water chamber 12. The upper end of the drainage mechanism 7 is connected to the drain outlet 121. The drainage mechanism 7 includes a drainage pump 71 and a traction valve 72, with the traction valve 72 connected between the drain outlet 121 and the drainage pump 71. The above structure facilitates the rapid drainage of water and achieves the effect of keeping the water tank body 1 clean with no residual water.

[0059] In this embodiment, as Figure 4 , 5 As shown, a heating element 8 for heating the water passing through the drain chamber 12 is provided on the outer peripheral wall of the drain chamber 12. This heating element 8 is a thick-film heating element covering the outer peripheral wall of the drain chamber 12. When the water tank body 1 is used as a cleaning machine, the above structure can quickly heat the return water, thereby improving the heating effect; and, since the thick-film heating element covering the outer peripheral wall of the drain chamber is used, it is beneficial to improve heating efficiency and reduce heat loss; the heating element also heats the slag collection basket, which can also keep the slag collection basket dry and hygienic, sterilize and disinfect, and prevent bacterial growth.

[0060] The top of the sink body 1 is provided with a flip-up door for opening or closing the top opening of the sink body 1.

[0061] like Figure 6 , 7 As shown, in this embodiment, a vertically extending guide sleeve 43 is provided at the water inlet 41 of the spray arm 4. The guide sleeve 43 is a telescopic structure. At least partially, the guide sleeve 43 is constrained at the bottom of the spray arm 4 and has an upper port corresponding to the water inlet 13. An elastic member 20 is provided at the guide sleeve 43 to keep the guide sleeve 43 always extending downward. The bottom of the bowl rack 100 is provided with a support leg 101 to enable it to stand. When the support leg 101 is suspended, the lower end of the guide sleeve 43 is lower than the lower end of the support leg 101. When the support leg 101 is supported on the table, the guide sleeve 43 partially contracts so that its lower end is at the same height as the lower end of the support leg 101. The above structure makes the connection between the spray arm 4 and the return water inlet 13 and the return water pipe 14 more reliable when in use, avoiding water leakage due to improper installation; when the dish rack 100 is used alone, it provides support and improves the standing stability of the dish rack 100.

[0062] For ease of assembly and connection, the guide sleeve 43 includes an upper guide sleeve 431 and a lower guide sleeve 432. The upper guide sleeve 431 is rotatably connected to the spray arm 4. The lower guide sleeve 432 is constrained to move up and down in the lower part of the upper guide sleeve 431. The elastic element 20 is provided between the upper guide sleeve 431 and the lower guide sleeve 432 and makes the lower guide sleeve 432 always maintain a downward movement trend.

[0063] The bottom wall of the spray arm 4 is provided with an assembly ring 411 extending downward around the water inlet 41. The upper end of the upper guide sleeve 431 is inserted and connected to the assembly ring 411. The outer peripheral wall of the upper guide sleeve 431 is provided with a support platform 4311 near the upper port to support the bottom of the assembly ring 411. The top wall of the spray arm 4 has spray holes 42 with different spray directions. The above structure facilitates the rotation of the spray arm 4 under the drive of water flow.

[0064] The upper end of the upper guide sleeve 431 is provided with upwardly extending support ribs 4312 at intervals. A support platform 4313 is provided on the top of the support ribs 4312. The top wall of the spray arm 4 has an installation port 44 that can be connected to the support platform 4313 and allows the support platform 4313 to protrude from the top of the spray arm 4. The support platform 4313 is constrained to the bottom of the dish rack 100 by a fitting 45. With the above structure, the spray arm 4 can be constrained to the bottom of the dish rack 100 while allowing the spray arm 4 to rotate relative to the dish rack 100.

[0065] To facilitate the restraint of the spray arm 4 at the bottom of the dish rack 100, the upper surface of the support platform 4313 is provided with an upwardly extending mounting piece 4314. Correspondingly, the mounting piece 45 is provided with a plug sleeve 451 that can be inserted into the mounting piece 4314 from top to bottom. The side wall of the mounting piece 4314 has a snap-fit ​​interface 4310. Correspondingly, the outer peripheral wall of the plug sleeve 451 is provided with a protrusion 4512 that can engage with the snap-fit ​​interface 4511. The mounting piece 45 is also provided with an outer sleeve 452 that surrounds the mounting piece 4314 and the mounting opening 44. The outer peripheral wall of the outer sleeve 452 is provided with an outwardly extending hook 4521. Correspondingly, the bottom of the dish rack 100 is provided with a mounting strip 102 for the hook 4521 to hold.

[0066] The upper guide sleeve 431 includes a first inner sleeve 4315 and a first outer sleeve 4316 arranged at intervals. The top of the first inner sleeve 4315 and the first outer sleeve 4316 are closed and the bottom is open. The lower guide sleeve 432 is movably inserted between the first inner sleeve 4315 and the first outer sleeve 4316. This structure is beneficial for providing a relatively closed cavity for the installation of the elastic element 20, improving assembly compactness.

[0067] For ease of assembly, the side wall of the first outer sleeve 4315 is provided with a vertically extending limiting installation groove 4317, and the side wall of the lower guide sleeve 432 is provided with an elastic buckle 4323 that can guide and cooperate with the limiting installation groove 4317 and be constrained in the limiting installation groove 4317.

[0068] When the sink body 1 is used as a dishwasher, the dish rack 100 is placed in the sink body 1, and the lower guide sleeve 432 is elastically pressed against the inner bottom wall of the sink body 1 and surrounds the outer periphery of the return water port 13 under the action of the elastic member 20, thereby achieving a seal and preventing water leakage.

[0069] When using the washing machine of this embodiment, if the sink body 1 needs to be used as a regular sink, the dish rack 100 and spray arm 4 are removed, and the one-way valve 5 automatically moves up to close the return water inlet 13. At this time, the upper wall of the one-way valve 5 forms part of the lower wall of the sink body 1. The overall shape of the sink body 1 is the same as that of a regular sink. The washing water is filtered and collected by the sludge basket 2 and then discharged into the drain pipe through the drain outlet 121. If the sink body 1 needs to be used as a dishwasher, the dish rack 100 and spray arm 4 are installed in the sink body 1. The one-way valve 5 opens the return water inlet 13 under the impact of the water flow, so that the return water pipe 14 is connected to the spray arm 4. Under the action of the return water drive mechanism 3, spray cleaning can be achieved. After cleaning, the last water is discharged into the drain pipe through the drain outlet 12.

[0070] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A cleaning machine comprising a sink body (1), the bottom of the sink body (1) is provided with a lower water outlet (11) and a lower water cavity (12) connected below the lower water outlet (11), characterized in that: Also included a backwater pipe (14) is provided outside the sink body (1) and is used to connect the sewer cavity (12) with the backwater opening (13); a one-way valve (5) is provided at the backwater opening (13) and can open the backwater opening (13) under water flow and close the backwater opening (13) without water flow; a bowl rack (100) is used to hold tableware or fruits and vegetables; a spray arm (4) is provided at the bottom of the bowl rack (100), the bottom of the spray arm (4) is provided with a water inlet (41), the water inlet (41) of the spray arm (4) is connected with the backwater opening (13) when the bowl rack (100) is placed in the sink body (1), and the backwater opening (13) remains closed under the action of the one-way valve (5) when the bowl rack (100) is taken out of the sink body (1); The device further comprises a flow guide sleeve (43) and an elastic member (20), the flow guide sleeve (43) is arranged at the bottom of the spray arm (4) and has an upper port corresponding to the water inlet (41), the elastic member (20) keeps the flow guide sleeve (43) always extending downward, the flow guide sleeve (43) comprises an upper flow guide sleeve (431) and a lower flow guide sleeve (432), the upper flow guide sleeve (431) is rotatably connected with the spray arm (4), the lower flow guide sleeve (432) is movably arranged at the lower part of the upper flow guide sleeve (431), the elastic member (20) is arranged between the upper flow guide sleeve (431) and the lower flow guide sleeve (432) and keeps the lower flow guide sleeve (432) always moving downward, the bottom wall of the spray arm (4) is provided with a mounting ring (411) extending downward around the upper flow guide sleeve (431), the upper end of the upper flow guide sleeve (431) is connected with the mounting ring (411), the outer wall of the upper flow guide sleeve (431) is provided with a first supporting platform (4311) near the upper port, the top of the supporting platform (4311) is provided with a supporting platform (4313), the top wall of the spray arm (4) is provided with a mounting port (44) capable of being connected with the supporting platform (4313) and exposing the supporting platform (4313) on the top of the spray arm (4), the supporting platform (4313) is movably arranged at the bottom of the bowl rack (100) through the mounting member (45), the upper flow guide sleeve (431) comprises a first inner sleeve (4315) and a first outer sleeve (4316), the top of the first inner sleeve (4315) is connected with the first outer sleeve (4316) in a closed mode, the lower end of the first inner sleeve (4315) is connected with the first outer sleeve (4316) in an open mode, the lower flow guide sleeve (432) is movably arranged between the first inner sleeve (4315) and the first outer sleeve (4316), the side wall of the first outer sleeve (4316) is provided with a vertical limiting installation groove (4317), the side wall of the lower flow guide sleeve (432) is provided with an elastic buckle (4323) capable of being guided and matched with the limiting installation groove (4317) and movably arranged in the limiting installation groove (4317).

2. The cleaning machine of claim 1, wherein: The one-way valve (5) comprises a first cover (51) and a second cover (52), the outer edge of the first cover (51) is rotatably connected with the inner edge of the water return port (13), the outer edge of the second cover (52) is rotatably connected with the inner edge of the water return port (13) and is arranged opposite to the first cover (51), the first cover (51) and the second cover (52) are reversely turned upward under the impact of water flow and the turning angle of the first cover (51) and the second cover (52) is less than 90 degrees.

3. The cleaning machine of claim 2, wherein: The backwater pipeline (14) comprises a vertical part (141) at the upper part and a horizontal part (142) connected to the lower end of the vertical part (141), the inner diameter of the vertical part (141) gradually decreases from bottom to top to form a tapered flow guide section (1411), and the upper end of the tapered flow guide section (1411) has a diameter matching that of the backwater port (13).

4. The machine according to claim 1 or 2 or 3, characterized in that: The bottom of the bowl rack (100) is provided with a supporting leg (101) allowing it to stand, and in the state that the supporting leg (101) is suspended, the lower end of the flow guide sleeve (43) is lower than the lower end of the supporting leg (101), and in the state that the supporting leg (101) is supported on the tabletop, the flow guide sleeve (43) is partially contracted so that its lower end is at the same height as the lower end of the supporting leg (101).

5. The machine of claim 1 or 2 or 3, wherein: The upper surface of the supporting platform (4313) is provided with an assembly sleeve (4314) extending upward, and correspondingly, the assembly part (45) is provided with a plug sleeve (451) capable of being inserted into the assembly sleeve from top to bottom, and the sidewall of the assembly sleeve (4314) is provided with a clamping port (4310), and correspondingly, the outer peripheral wall of the plug sleeve (451) is provided with a protrusion (4512) capable of being clamped with the clamping port (4310).

6. The cleaning machine of claim 5, wherein: The assembly part (45) is further provided with an outer sleeve (452) surrounding the assembly sleeve (4314) and the mounting port (44), and the outer peripheral wall of the outer sleeve (452) is provided with a clamping hook (4521) extending outward, and correspondingly, the bottom of the bowl rack (100) is provided with a mounting strip (102) for clamping the clamping hook (4521).

7. The machine of claim 1 or 2 or 3, wherein: The drain cavity (12) is provided with a slag collecting basket (2), and in the state that the spray arm (4) is connected opposite to the backwater port (13), the drain cavity (12) constitutes a backwater cavity for supplying water to the spray arm (4).

8. The cleaning machine of claim 7, wherein: The bottom of the drain cavity (12) is further provided with a drainage mechanism (7) for quickly draining water in the drain cavity (12), and the bottom of the drain cavity (12) is provided with a drainage port (121), and the upper end of the drainage mechanism (7) is connected to the drainage port (121).

9. The cleaning machine of claim 7, wherein: The drain cavity (12) and / or the outer peripheral wall of the drain cavity (12) is provided with a heating part (8) for heating water passing through the drain cavity (12).

10. The cleaning machine of claim 1 or 2 or 3, wherein: The drain cavity (12) and the backwater pipeline (14) are connected through a backwater driving mechanism (3).

11. The cleaning machine of claim 10, wherein: The backwater driving mechanism (3) is a water pump, the side of the drain cavity (12) is provided with a water guide pipe (122) arranged transversely and connected to the water inlet end of the water pump, and the water outlet end of the water pump is located at the top and connected to the lower end of the backwater pipeline (14).

12. The cleaning machine of claim 11, wherein: The first end of the water guide pipe (122) is tangentially connected to the side of the drain cavity (12), and the second end is connected to the water inlet end of the water pump.

13. The cleaning machine of claim 12, wherein: The water guide pipe (122) comprises a first section (1221), a second section (1222) and a third section (1223) connected in sequence and gradually increasing in diameter along the water flow direction, the inner side of the first section (1221) is shaped on the inner wall of the lower water cavity (12) and penetrates the lower water cavity (12), and the outer side protrudes out of the lower water cavity (12), the second section (1222) is a tapered section gradually increasing in diameter, and the part close to the water inlet end is integrally shaped with the lower water cavity (12), and the third section (1223) is a straight cylinder section.

14. The cleaning machine of claim 13, wherein: The lower water cavity (12) is provided with a slag collecting basket (2), and the inner side of the first section (1221) of the water guide pipe (122) and the water inlet end of the second section (1222) are arranged corresponding to the side wall of the slag collecting basket (2).

15. The cleaning machine of claim 14, wherein: The side wall of the lower water cavity (12) is further connected to a water inlet pipe (16), the water inlet pipe (16) is tangentially connected to the lower water cavity (12), and the connection between the water inlet pipe (16) and the lower water cavity (12) is arranged opposite to the connection between the water guide pipe (122) and the lower water cavity (12) and the flow direction is opposite.

16. The cleaning machine of claim 15, wherein: The slag collecting basket (2) is a cylindrical structure with a closed lower end and an open top, and the diameter of the slag collecting basket (2) gradually decreases from top to bottom.

17. The cleaning machine of claim 1 or 2 or 3, wherein: The inner bottom wall of the sink body (1) is detachably provided with an end cover (6) capable of opening or closing the upper port of the lower water cavity (12).

18. The cleaning machine of claim 1 or 2 or 3, wherein: The inner bottom wall of the sink body (1) is provided with a flow guide area (111) partially recessed around the periphery of the lower water outlet (11).

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