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, cover, first elastic member, 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, easy 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 and the plug-in connection of backwater mouth are 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 cover, which can be moved up and down, is provided at the return water inlet to open or close the return water inlet;

[0011] The first elastic element ensures that the cover always moves upward to close the return water outlet;

[0012] A dish rack, used to hold tableware or fruits and vegetables;

[0013] A spray arm is located at the bottom of the dish rack. When the dish rack is placed in the sink body, a portion of the spray arm passes through the return water inlet and presses against the cover. The cover moves downward under the pressure of the spray arm, thereby connecting the return water pipe with the spray arm. When the dish rack is removed from the sink body, the cover closes the return water inlet under the drive of the first elastic element.

[0014] Preferably, the upper part of the return water pipe is a vertical section extending downwards corresponding to the return water inlet, and the cover is movably disposed in this vertical section, with the elastic element disposed at the bottom of the cover. The aforementioned return water pipe not only serves for return water but also provides assembly space for the cover and the elastic element, resulting in a compact overall structure.

[0015] Preferably, the inner diameter of the vertical portion of the return water pipe is larger than the diameter of the return water inlet, and the top of the cover is provided with a filling part that can be inserted into the return water inlet when the return water inlet is closed. When the filling part is inserted into the return water inlet, the upper wall surface of the filling part is flush with the inner bottom wall of the water tank body to maintain the integrity of the original bottom wall of the water tank and maintain a good water guiding, filtering, and sludge collection effect.

[0016] Preferably, the inner wall of the vertical section of the return water pipe has a vertically extending guide groove. Correspondingly, the outer peripheral wall below the filling part is provided with a stop block that can cooperate with the guide groove and abuts against the bottom edge of the return water outlet when the return water outlet is closed. The above structure can stabilize the up and down movement of the cover and limit its position when the cover closes the return water outlet.

[0017] Preferably, the inner bottom wall of the return water pipe is provided with a positioning post extending upwards corresponding to the return water inlet. Correspondingly, the lower part of the cover is provided with a guide sleeve that can be inserted into the positioning post. The elastic element is sleeved outside the positioning post and at least partially located within the guide sleeve. Preferably, the upper diameter of the positioning post is smaller than the lower diameter, thus forming a support platform at the joint. The lower end of the elastic element abuts against this support platform, and the upper end abuts against the inner top wall of the guide sleeve. This structure helps improve the installation stability of the elastic element and the cover.

[0018] Preferably, the lower part of the return water pipe is a horizontal section that bends horizontally to one side from the lower end of the vertical section and extends therein, with a smooth transition between the vertical and horizontal sections. The positioning post is located at the smooth transition point between the vertical and horizontal sections. Positioned at this location, the positioning post can also guide the water flow upwards to a certain extent.

[0019] The cleaning machine of the present invention further includes a guide sleeve and a second elastic element. A water inlet is provided on the bottom wall of the spray arm. The guide sleeve, at least partially extendable vertically, is constrained at the bottom of the spray arm and has an upper port corresponding to the water inlet. The second 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.

[0020] 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.

[0021] 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 second elastic element is disposed between the upper guide sleeve and the lower guide sleeve and keeps the lower guide sleeve always moving downward.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Preferably, the upper guide sleeve includes a first inner sleeve and a first outer sleeve arranged at intervals, and the lower guide sleeve includes a second inner sleeve and a second outer sleeve arranged at intervals. The first inner sleeve and the first outer sleeve are closed at the top and open at the bottom. The second inner sleeve and the second outer sleeve are open at the top and closed at the bottom. The second inner sleeve is movably inserted into the first inner sleeve, and the second outer sleeve is movably inserted into the first outer sleeve. This structure is beneficial for providing a relatively closed internal cavity for the installation of the second elastic element, improving assembly compactness.

[0026] For ease of assembly, the side wall of the first outer jacket is provided with a vertically extending limiting mounting groove, and the side wall of the second outer jacket is provided with an elastic buckle that can guide and cooperate with the limiting mounting groove and be constrained in the limiting mounting groove.

[0027] Preferably, the lower end of the guide sleeve is provided with a pressing part that can pass through the return water inlet and press the cap downward. This structure facilitates the simultaneous pressing down of the cap and connection of the return water pipe to the guide sleeve after the bowl rack is placed into the sink body.

[0028] Preferably, the pressure-retaining part includes at least two guide arms extending from top to bottom along the inner wall of the lower end of the guide sleeve towards the center, with the lower ends of each guide arm smoothly connected by a ring. The guide arms, while providing pressure against the cap, also serve a guiding function, directing the water flow from the center of the return water pipe into the guide sleeve, thus reducing energy loss.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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, the cover is opened, and the lower water chamber is used as a return water chamber. The water in the lower water chamber flows back to the spray arm through the return water pipe and the return water inlet and is sprayed out. When the sink body needs to be used as a regular sink, the dish rack and its accompanying spray arm are removed, the cover is closed, and the water in the lower water chamber is directly discharged into the drain pipe. This 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

[0041] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention (showing the dishwasher in use);

[0042] Figure 2 This is a structural schematic diagram of an embodiment of the present invention (in the form of a regular water tank).

[0043] Figure 3 This is a schematic diagram of the structure of an embodiment of the present invention (in an unused state);

[0044] Figure 4 This is a schematic diagram of the structure of an embodiment of the present invention;

[0045] Figure 5 for Figure 4 A structural diagram from another angle;

[0046] Figure 6 for Figure 1 A sectional view;

[0047] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0048] Figure 8 This is an assembly diagram of the bowl rack and spray arm in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the spray arm in an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the lower water cavity portion in an embodiment of the present invention;

[0051] Figure 11 for Figure 10 Another angle of the image. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0053] like Figures 1-11 As shown, the cleaning machine in this embodiment includes a water tank body 1, a return water pipe 14, a cover 5, a first elastic element 9, a bowl rack 100, and a spray arm 4.

[0054] 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.

[0055] 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.

[0056] The cover 5 is movably positioned at the return water inlet 13 to open or close the return water inlet 13. A first elastic element 9 is provided at the bottom of the cover 5 to maintain an upward tendency, thereby closing the return water inlet 13. When the spray arm 4 is inserted into the return water inlet 13, the cover 5 is pressed into the return water pipe 14 by the spray arm 4, thus connecting the spray arm 4 to the return water inlet 13. When the spray arm 4 is disengaged from the return water inlet 13, the cover 5 closes the return water inlet 13 under the drive of the first elastic element 9.

[0057] Specifically, the upper part of the return water pipe 14 is a vertical section 141 extending downwards from the return water inlet 13. The cover 5 is movably disposed in this vertical section 141, and the first elastic member 9 is disposed at the bottom of the cover 5. The aforementioned return water pipe 14 is not only used for return water, but also provides assembly space for the cover 5 and the first elastic member 9, resulting in a compact overall structure.

[0058] The inner diameter of the vertical portion 141 of the return water pipe 14 is larger than the diameter of the return water inlet 13. The top of the cover 5 is provided with a filling part 51 that can be inserted into the return water inlet 13 when it is closed. When the filling part 51 is inserted into the return water inlet 13, its upper wall surface is flush with the inner bottom wall of the water tank body 1 to maintain the integrity of the original water tank bottom wall and ensure good water guiding, filtration, and sludge collection effects. A vertically extending guide groove 1411 is formed on the inner wall of the vertical portion 141 of the return water pipe 14. Correspondingly, a stop block 511 is provided on the outer peripheral wall below the filling part 51, which can engage with the guide groove 1411 and abut against the bottom edge of the return water inlet 13 when it is closed. This structure allows the cover 5 to move stably up and down and limits its position when it closes the return water inlet 13.

[0059] A positioning post 140 extending upwards from the return water inlet 13 is provided on the inner bottom wall of the return water pipe 14. Correspondingly, a guide sleeve 54 is provided at the lower part of the cover 5 to engage with the positioning post 140. The first elastic element 9 is a spring, sleeved outside the positioning post 140 and at least partially located in the guide sleeve 54. The upper diameter of the positioning post 140 is smaller than the lower diameter, thus forming a support platform 143 at the joint. The lower end of the first elastic element 9 abuts against the support platform 143, and the upper end abuts against the inner top wall of the guide sleeve 54. The above structure helps to improve the installation stability of the first elastic element 9 and the cover 5.

[0060] The lower part of the return water pipe 14 is a horizontal section 142 that bends horizontally to one side from the lower end of the vertical section 141 and extends thereto. The vertical section 141 and the horizontal section 142 transition smoothly, and the positioning column 140 is located at the smooth transition between the vertical section 141 and the horizontal section 142. Located at this location, the positioning column 140 can also guide the water flow upward to a certain extent.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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 3 As 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] like Figure 6 , 7As shown, in this embodiment, the bowl rack 100 is used to hold tableware or fruits and vegetables; the spray arm 4 is located at the bottom of the bowl rack 100. When the bowl rack 100 is placed in the sink body 1, a portion of the spray arm 4 passes through the return water inlet 13 and presses against the cover 5. The cover 5 moves downward under the pressure of the spray arm 4, thereby connecting the return water pipe 14 with the spray arm 4; when the bowl rack 100 is removed from the sink body 1, the cover 5 closes the return water inlet 13 under the drive of the first elastic member 9.

[0070] Specifically, a vertically extending guide sleeve 43 is provided at the water inlet 41 of the spray arm 4. This 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. A second elastic element 20 is provided at the guide sleeve 43 to keep the guide sleeve always extending downward. The bottom of the dish rack 100 is provided with a support leg 101 to enable it to stand upright. 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 during 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.

[0071] 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 at the lower part of the upper guide sleeve 431. The second elastic member 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 moving trend.

[0072] 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 first 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.

[0073] 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.

[0074] 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.

[0075] The upper guide sleeve 431 includes a first inner sleeve 4315 and a first outer sleeve 4316 arranged at intervals. The lower guide sleeve 432 includes a second inner sleeve 4321 and a second outer sleeve 4322 arranged at intervals. The first inner sleeve 4315 and the first outer sleeve 4316 are closed at the top and open at the bottom. The second inner sleeve 4321 and the second outer sleeve 4322 are open at the top and closed at the bottom. The second inner sleeve 4321 is movably inserted into the first inner sleeve 4315, and the second outer sleeve 4322 is movably inserted into the first outer sleeve 4316. This structure is beneficial for providing a relatively closed internal cavity for the installation of the second elastic member 20, improving assembly compactness.

[0076] For ease of assembly, the side wall of the first outer sleeve 4315 is provided with a vertically extending limiting mounting groove 4317, and the side wall of the second outer sleeve 4322 is provided with an elastic buckle 4323 that can guide and cooperate with the limiting mounting groove 4317 and be constrained in the limiting mounting groove 4317.

[0077] The lower end of the guide sleeve 43 is provided with a pressing part 434 that can pass through the return water inlet 13 to press the cover 5 downward. This structure facilitates the simultaneous pressing of the cover 5 and the connection between the return water pipe 14 and the guide sleeve 43 after the bowl rack 100 is placed into the sink body 1. The pressing part 434 includes four guide arms 4341 extending from the inner wall of the lower end of the guide sleeve 43 downward toward the center, and the lower ends of each guide arm 4341 are smoothly connected by a ring 4342. While pressing the cover 5, the guide arms 4341 also serve to guide the water in the middle of the return water pipe 14 into the guide sleeve 43, reducing energy loss.

[0078] 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. Under the action of the first elastic member 9, the cover 5 automatically moves upward to close the return water inlet 13. At this time, the upper wall of the cover 5 constitutes 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 collection 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. Under the pressure of the bottom pressing part 434 of the spray arm 4, the cover 5 moves downward to open the return water inlet 13, 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 realized. After cleaning, the last water is discharged into the drain pipe through the drain outlet 12.

[0079] 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: Further comprising a backwater pipe (14), a backwater opening (13) is opened on the bottom of the sink body (1) beside the drain opening (11), the backwater pipe (14) is arranged outside the sink body (1) and is used to connect the drain cavity (12) with the backwater opening (13); a cover (5) is arranged movably up and down at the backwater opening (13) and is used to open or close the backwater opening (13); a first elastic member (9) is used to make the cover (5) always keep the tendency of moving upward to close the backwater opening (13); a bowl rack (100) is used to hold tableware or fruits and vegetables; a spray arm (4) is arranged at the bottom of the bowl rack (100), when the bowl rack (100) is placed in the sink body (1), the spray arm (4) partially penetrates the backwater opening (13) and presses on the cover (5), the cover (5) moves downward under the pressing of the spray arm (4) to make the backwater pipe (14) communicate with the spray arm (4); when the bowl rack (100) is taken out of the sink body (1), the cover (5) closes the backwater opening (13) under the driving of the first elastic member (9); further comprising a flow guide sleeve (43) and a second elastic member (20), a water inlet (41) is opened on the bottom wall of the spray arm (4), at least a part of 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 second elastic member (20) is used to make the flow guide sleeve (43) always keep the tendency of extending downward; the lower end of the flow guide sleeve (43) is provided with a pressing part (434) which can press downward on the cover (5) through the backwater opening (13).

2. The cleaning machine of claim 1, wherein: The upper part of the backwater pipe (14) is a vertical part (141) which extends downward corresponding to the backwater opening (13), the cover (5) is movably arranged up and down in the vertical part (141), and the first elastic member (9) is arranged at the bottom of the cover (5).

3. The cleaning machine of claim 2, wherein: The inner diameter of the vertical part (141) of the backwater pipe (14) is greater than the diameter of the backwater opening (13), and the top of the cover (5) is provided with a filling part (51) which can be inserted into the backwater opening (13) when the backwater opening (13) is closed.

4. The cleaning machine of claim 3, wherein: A vertical guide limiting groove (1411) is opened on the inner wall of the vertical part (141) of the backwater pipe (14), and correspondingly, a stop block (511) is arranged on the outer peripheral wall below the filling part (51) and can cooperate with the guide limiting groove (1411) and abut against the bottom edge of the backwater opening (13) when the backwater opening (13) is closed.

5. The cleaning machine of claim 2, wherein: A positioning column (140) which extends upward corresponding to the backwater opening (13) is arranged on the inner bottom wall of the backwater pipe (14), and correspondingly, a guide sleeve (54) which can be inserted into the positioning column (140) is arranged on the lower part of the cover (5), and the first elastic member (9) is sleeved outside the positioning column (140) and at least partially located in the guide sleeve (54).

6. The cleaning machine of claim 5, wherein: The upper diameter of the positioning post (140) is smaller than the lower diameter, thus forming a support platform (143) at the joint. The lower end of the first elastic member (9) abuts against the support platform (143), and the upper end abuts against the inner top wall of the guide sleeve (54).

7. The cleaning machine of claim 5, wherein: The lower part of the return water pipe (14) is a horizontal part (142) that bends horizontally to one side from the lower end of the vertical part (141) and extends thereto. The vertical part (141) and the horizontal part (142) are smoothly transitioned. The positioning post (140) is located at the smooth transition between the vertical part (141) and the horizontal part (142).

8. The cleaning machine of any one of claims 1-7, wherein: The bottom of the bowl rack (100) is provided with a support leg (101) that enables it to stand upright. When the support leg (101) is suspended, the lower end of the flow 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 flow guide sleeve (43) partially contracts so that its lower end is at the same height as the lower end of the support leg (101).

9. The cleaning machine of any one of claims 1-7, wherein: 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. The lower guide sleeve (432) is constrained to move up and down in the lower part of the upper guide sleeve (431). The second elastic member (20) is disposed 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.

10. The cleaning machine of claim 9, wherein: The bottom wall of the spray arm (4) is provided with an assembly ring (411) extending downward around the upper guide sleeve (431) of the water inlet. 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 first support platform (4311) near the upper port to support the bottom of the assembly ring (411).

11. The cleaning machine of claim 10, wherein: The upper end of the upper guide sleeve (431) is provided with upwardly extending support ribs (4312) at intervals. The top of the support ribs (4312) is provided with a support platform (4313). 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 be exposed at the top of the spray arm (4). The support platform (4313) is constrained to the bottom of the bowl rack (100) by the fittings (45).

12. The cleaning machine of claim 11, wherein: The upper surface of the support platform (4313) is provided with an upwardly extending assembly (4314). Correspondingly, the assembly (45) is provided with a plug sleeve (451) that can be inserted into the assembly from top to bottom. The side wall of the assembly (4314) is provided with a card interface (4310). Correspondingly, the outer peripheral wall of the plug sleeve (451) is provided with a protrusion (4512) that can engage with the card interface (4310).

13. The cleaning machine of claim 12, wherein: The fitting (45) is also provided with an outer sleeve (452) that surrounds the fitting (4314) and the mounting port (44). The outer peripheral wall of the outer sleeve (452) is provided with outwardly extending hooks (4521). Correspondingly, the bottom of the bowl rack (100) is provided with a mounting strip (102) for the hooks (4521) to hold.

14. The cleaning machine of claim 9, wherein: The upper guide sleeve (431) includes a first inner sleeve (4315) and a first outer sleeve (4316) arranged at intervals. The lower guide sleeve (432) includes a second inner sleeve (4321) and a second outer sleeve (4322) arranged at intervals. The first inner sleeve (4315) and the first outer sleeve (4316) are connected closed at the top and open at the bottom. The second inner sleeve (4321) and the second outer sleeve (4322) are connected open at the top and closed at the bottom. The second inner sleeve (4321) can be inserted into the first inner sleeve (4315) in a way that allows it to move up and down. The second outer sleeve (4322) can be inserted into the first outer sleeve (4316) in a way that allows it to move up and down.

15. The cleaning machine of claim 14, wherein: The first outer sleeve (4316) has a vertically extending limiting installation groove (4317) on its side wall, and the second outer sleeve (4322) has an elastic buckle (4323) on its side wall that can guide and cooperate with the limiting installation groove (4317) and be constrained in the limiting installation groove (4317).

16. The cleaning machine of any one of claims 1-7, wherein: The pressure part (434) includes at least two guide arms (4341) extending from the inner wall of the lower end of the guide sleeve (43) towards the center, and the lower ends of each guide arm (4341) are smoothly connected by a ring (4342).

17. The cleaning machine of any one of claims 1-7, wherein: The drain chamber (12) is provided with a slag collection basket (2). When the spray arm (4) and the return water port (13) are connected, the drain chamber (12) is configured as a return water chamber for water supply to the spray arm (4).

18. The cleaning machine of claim 17, wherein: The bottom of the drain chamber (12) is also provided with a drainage mechanism (7) for quickly draining the water in the drain chamber (12). The bottom of the drain chamber (12) is provided with a drain outlet (121). The upper end of the drainage mechanism (7) is connected to the drain outlet (121).

19. The cleaning machine of claim 17, wherein: The drain chamber (12) and / or the outer peripheral wall of the drain chamber (12) are provided with a heating element (8) for heating the water passing through the drain chamber (12).

20. The cleaning machine of any one of claims 1-7, wherein: The lower water chamber (12) and the return water pipe (14) are connected by a return water drive mechanism (3).

21. The cleaning machine of claim 20, wherein: The water return drive mechanism (3) is a water pump. A water guide pipe (122) is arranged horizontally on the side of the lower water chamber (12) and connected to the water inlet end of the water pump. The water outlet end of the water pump is located at its top and connected to the lower end of the water return pipe (14).

22. The cleaning machine of claim 21, wherein: The first end of the water guide pipe (122) is tangentially connected to the side of the lower water chamber (12), and the second end is connected to the water inlet of the water pump.

23. The cleaning machine of claim 22, wherein: The water guide pipe (122) includes a first section (1221), a second section (1222), and a third section (1223) that 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 cavity (12) and is connected to the drain cavity (12), while the outer part protrudes outside the drain cavity (12). The second section (1222) is a tapered section with gradually increasing inner diameter, and the part near the water inlet end is formed as one piece with the drain cavity (12). The third section (1223) is a straight cylindrical section.

24. The cleaning machine of claim 23, wherein: The lower water chamber (12) is provided with a slag collection basket (2), and the inner part of the first section (1221) and the water inlet part of the second section (1222) of the water guide pipe (122) are arranged corresponding to the side wall of the slag collection basket (2).

25. The cleaning machine of claim 24, wherein: The side wall of the lower water chamber (12) is also connected to the water inlet pipe (16), which is tangentially connected to the lower water chamber (12). Furthermore, the connection between the water inlet pipe (16) and the lower water chamber (12) is arranged opposite to the connection between the water guide pipe (122) and the lower water chamber (12), and the flow direction is opposite.

26. The cleaning machine of claim 24, wherein: 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.

27. The cleaning machine of any one of claims 1-7, wherein: The inner bottom wall of the water tank body (1) is provided with a detachable end cap (6) that can open or close the upper port of the lower water chamber (12).

28. The cleaning machine of any one of claims 1-7, wherein: The inner bottom wall of the water tank body (1) is provided with a flow guiding area (111) that is partially recessed around the drain outlet (11).

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