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, elastic member, 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 by 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;And, compared with the existing ordinary sink, the present application only opens backwater mouth in the sink body, overall structure is simple, and the modification cost 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 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 dishwasher and ordinary sink use, in light of the current state of the technology.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0007] 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:

[0008] 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.

[0009] A cover, which can be moved up and down, is provided at the return water inlet to open or close the return water inlet;

[0010] The elastic element ensures that the cover always tends to move upwards, thereby closing the return water outlet;

[0011] The spray arm is detachably installed in the water tank body and arranged corresponding to the return water inlet. When the spray arm and the return water inlet are connected by insertion, the cover is pressed into the return water pipe by the spray arm, thereby connecting the spray arm and the return water inlet. When the spray arm is disengaged from the return water inlet, the cover closes the return water inlet under the drive of the elastic element.

[0012] 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.

[0013] Preferably, the inner diameter of the vertical portion of the return water pipe is larger than the diameter of the return water inlet. The top of the cover is provided with a filling part that can be inserted into the return water inlet when it is closed. Below the filling part is a stop block that abuts against the bottom edge of the return water inlet. When the filling part is inserted into the return water inlet, the upper wall 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.

[0014] Preferably, a downward-extending retaining ring is provided at the edge of the return water inlet, and correspondingly, a sealing ring that can cooperate with the inner wall of the retaining ring is embedded on the outer peripheral wall of the filling part. This structure helps to improve the sealing performance between the filling part and the return water inlet, and can prevent water leakage at the return water inlet when the water tank is used as a regular water tank.

[0015] 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.

[0016] 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.

[0017] Preferably, the bottom wall of the spray arm is provided with a water inlet and a water guide sleeve extending downward from the water inlet. The water guide sleeve is detachably connected to the water return inlet. The side wall of the water guide sleeve is also provided with a water inlet notch that can communicate with the water return pipe. After the spray arm is installed in the sink body, water in the water return pipe enters the spray arm through the aforementioned water inlet notch and is sprayed upward, which can clean a small number of dishes.

[0018] Preferably, at least two spaced-apart support arms are provided at the bottom edge of the water guide sleeve, and the gap between two adjacent support arms constitutes the water inlet. When the spray arm and return water inlet are assembled, the lower end of the support arm presses against the upper wall of the cover, and the support arm is connected to the edge of the return water inlet for limiting positioning. The water inlet is located in the return water pipe below the return water inlet. This structure facilitates the assembly of the spray arm and the return water inlet.

[0019] To facilitate the assembly and disassembly of the spray arm, the support arm has a vertically extending opening. An elastic locking foot extending upwards from the lower edge of this opening is provided, and the upper end of the elastic locking foot has a locking block that engages with the lower edge of the return water inlet. Preferably, the outer peripheral wall of the water guide sleeve is provided with a lower retaining ring that abuts against the inner bottom wall of the water tank body when the spray arm and return water inlet are assembled.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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 lower water chamber is used as a return water chamber, 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 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 plug-in connection between the spray arm and the return water inlet facilitates operation. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention (in the form of a dishwasher in use);

[0033] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention (in the form of a regular water tank).

[0034] Figure 3 This is a schematic diagram of the structure of Embodiment 1 of the present invention (in an unused state);

[0035] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0036] Figure 5 for Figure 4 A structural diagram from another angle;

[0037] Figure 6 for Figure 1 A sectional view;

[0038] Figure 7 for Figure 6 A magnified view of a portion of the image;

[0039] Figure 8 for Figure 1 Another sectional view;

[0040] Figure 9 for Figure 8 A magnified view of a portion of the image;

[0041] Figure 10This is a schematic diagram of the lower water chamber in Embodiment 1 of the present invention;

[0042] Figure 11 for Figure 10 Another angle view;

[0043] Figure 12 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0044] Figure 13 for Figure 12 A magnified view of a portion of the image;

[0045] Figure 14 This is an assembly diagram of the bowl rack and spray arm in Embodiment 2 of the present invention;

[0046] Figure 15 This is a schematic diagram of the spray arm in Embodiment 2 of the present invention; Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0048] Example 1:

[0049] like Figures 1-11 As shown, the cleaning machine in this embodiment includes a water tank body 1. 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.

[0050] like Figure 4 , 6 As 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 only modification to the sink body 1 in this embodiment is 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.

[0051] In this embodiment, the sink body 1 is equipped with a detachable spray arm 4. The bottom of the spray arm 4 has a water inlet 41 that can be connected to the return water inlet 13, and the top wall of the spray arm 4 has a spray hole 42. When the sink body 1 is used as a dishwasher, the spray arm 4 is installed to provide an upward spray of water, thereby expanding the spray range and improving the cleaning effect.

[0052] like Figures 6-9 As shown, a cover 5 is provided on the inner bottom wall of the water tank body 1, which can open or close the return water inlet 13. The cover 5 is movably positioned at the return water inlet 13. An elastic element 9 is provided at the bottom of the cover 5 to keep the cover 5 in an upward moving trend, 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 and 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 elastic element 9.

[0053] 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 elastic element 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 elastic element 9, resulting in a compact overall structure.

[0054] 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. Below the filling part 51 are four blocks 52 that abut against the bottom edge of the return water inlet 13, spaced apart around the circumference of the cover 5. When the filling part 51 is inserted into the return water inlet 13, its upper wall is flush with the inner bottom wall of the water tank body 1, maintaining the integrity of the original water tank bottom wall and ensuring good water guiding, filtration, and sludge collection effects.

[0055] A downward-extending retaining ring 131 is provided at the edge of the return water inlet 13. Correspondingly, a sealing ring 53 is embedded on the outer peripheral wall of the filling part 51, which can cooperate with the inner wall of the retaining ring 131 to seal. This structure helps to improve the sealing performance between the filling part 51 and the return water inlet 13, and can prevent water leakage at the return water inlet when the water tank body 1 is used as a regular water tank.

[0056] 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 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 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 elastic element 9 and the cover 5.

[0057] 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.

[0058] In this embodiment, the bottom wall of the spray arm 4 is provided with a water inlet 41 and a water guide sleeve 43 extending downward from the water inlet 41. The water guide sleeve 43 is detachably connected to the return water inlet 13. The side wall of the water guide sleeve 43 is also provided with a water inlet notch 431 that can communicate with the return water pipe 14. After the spray arm 4 is installed in the sink body 1, the water in the return water pipe 14 enters the spray arm 4 through the above-mentioned water inlet notch 431 and is sprayed upward, which can clean a small number of dishes.

[0059] Two symmetrically arranged support arms 432 are provided at the bottom edge of the water guide sleeve 43. The gap between two adjacent support arms 432 forms a water inlet 431. When the spray arm 4 and the return water inlet 13 are assembled, the lower end of the support arm 432 presses against the upper wall of the cover 5. The support arm 432 is connected to the edge of the return water inlet 13 for limiting. The water inlet 431 is located in the return water pipe 14 below the return water inlet 13. The above structure facilitates the assembly of the spray arm 4 and the return water inlet 13.

[0060] To facilitate the assembly and disassembly of the spray arm, the support arm 432 has a vertically extending opening 433. An elastic locking foot 434 extends upward from the lower edge of this opening 433. The upper end of the elastic locking foot 434 has a locking block 435 that engages with the lower edge of the return water inlet 13. A lower retaining ring 436 is provided on the outer peripheral wall of the water guide sleeve 43, which abuts against the inner bottom wall of the water tank body 1 when the spray arm 4 and return water inlet 13 are assembled.

[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] When using the cleaning machine of this embodiment, if the sink body 1 needs to be used as a regular sink, the spray arm 4 is removed, and the cover 5 automatically moves upward under the action of the elastic member 9 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 spray arm 4 is installed at the return water inlet 13 at the bottom of the sink body 1. The spray arm 4 is constrained to the bottom wall of the sink body 1 by the buckle 425. At the same time, the cover 5 moves downward under the pressure of the spray arm 4 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.

[0070] Example 2:

[0071] The difference between this embodiment and Embodiment 1 is that: Figures 12-15 As shown, in this embodiment, the spray arm 4a and the return water inlet 13a are not detachably connected by a snap-fit ​​mechanism; in fact, there is no direct limiting relationship between the spray arm 4a and the return water inlet 13a. In this embodiment, the spray arm 4a is installed at the bottom of the dish rack. After the dish rack is placed into the sink body 1a, the cover 5a is pressed downwards to open the return water inlet 13a, connecting the spray arm 4a to the return water inlet 13a and the return water pipe 14a.

[0072] Specifically, the dish rack 100a is used to hold tableware or fruits and vegetables; the spray arm 4a is located at the bottom of the dish rack 100a. When the dish rack 100a is placed in the sink body 1a, a portion of the spray arm 4a passes through the return water inlet 13a and presses against the cover 5a. Under the pressure of the spray arm 4a, the cover 5a moves downward, thereby connecting the return water pipe 14a with the spray arm 4a. When the dish rack 100a is removed from the sink body 1a, the cover 5a closes the return water inlet 13a under the drive of the first elastic member 9a.

[0073] A vertically extending guide sleeve 43a is provided at the water inlet 41a of the spray arm 4a. This guide sleeve 43a is a telescopic structure. At least partially, the guide sleeve 43a is constrained at the bottom of the spray arm 4a and has an upper port corresponding to the water inlet 13a. A second elastic element 20a is provided at the guide sleeve 43a to keep the guide sleeve always extending downward. The bottom of the bowl rack 100a is provided with a support leg 101a to support it. When the support leg 101a is suspended, the lower end of the guide sleeve 43a is lower than the lower end of the support leg 101a. When the support leg 101a is supported on the table, the guide sleeve 43a partially contracts so that its lower end is at the same height as the lower end of the support leg 101a. The above structure makes the connection between the spray arm 4a and the return water inlet 13a and the return water pipe 14a more reliable when in use, avoiding water leakage due to improper installation; when the dish rack 100a is used alone, it provides support and improves the standing stability of the dish rack 100a.

[0074] For ease of assembly and connection, the guide sleeve 43a includes an upper guide sleeve 431a and a lower guide sleeve 432a. The upper guide sleeve 431a is rotatably connected to the spray arm 4a. The lower guide sleeve 432a is constrained to move up and down in the lower part of the upper guide sleeve 431a. The second elastic member 20a is provided between the upper guide sleeve 431a and the lower guide sleeve 432a and makes the lower guide sleeve 432a always maintain a downward moving trend.

[0075] The bottom wall of the spray arm 4a is provided with an assembly ring 411a extending downward around the water inlet 41a. The upper end of the upper guide sleeve 431a is inserted and connected to the assembly ring 411a. The outer peripheral wall of the upper guide sleeve 431a is provided with a first support platform 4311a near the upper port to support the bottom of the assembly ring 411a. The top wall of the spray arm 4a has spray holes 42a with different spray directions. The above structure facilitates the rotation of the spray arm 4a under the drive of water flow.

[0076] The upper end of the upper guide sleeve 431a is provided with upwardly extending support ribs 4312a at intervals. A support platform 4313a is provided on the top of the support ribs 4312a. The top wall of the spray arm 4a has a mounting port 44a that can be connected to the support platform 4313a and allows the support platform 4313a to protrude from the top of the spray arm 4a. The support platform 4313a is constrained to the bottom of the bowl rack 100a by a fitting 45a. With the above structure, the spray arm 4a can be constrained to the bottom of the bowl rack 100a while allowing the spray arm 4a to rotate relative to the bowl rack 100a.

[0077] To facilitate the restraint of the spray arm 4a at the bottom of the dish rack 100a, the upper surface of the support platform 4313a is provided with an upwardly extending mounting piece 4314a. Correspondingly, the mounting piece 45a is provided with a plug sleeve 451a that can be inserted into the mounting piece 4314a from top to bottom. The side wall of the mounting piece 4314a has a snap-fit ​​interface 4310a. Correspondingly, the outer peripheral wall of the plug sleeve 451a is provided with a protrusion 4512a that can engage with the snap-fit ​​interface 4511a. The mounting piece 45a is also provided with an outer sleeve 452a that surrounds the mounting piece 4314a and the mounting opening 44a. The outer peripheral wall of the outer sleeve 452a is provided with an outwardly extending hook 4521a. Correspondingly, the bottom of the dish rack 100a is provided with a mounting strip 102a for the hook 4521a to hold.

[0078] The upper guide sleeve 431a includes a first inner sleeve 4315a and a first outer sleeve 4316a arranged at intervals, and the lower guide sleeve 432a includes a second inner sleeve 4321a and a second outer sleeve 4322a arranged at intervals. The first inner sleeve 4315a and the first outer sleeve 4316a are closed at the top and open at the bottom. The second inner sleeve 4321a and the second outer sleeve 4322a are open at the top and closed at the bottom. The second inner sleeve 4321a is movably inserted into the first inner sleeve 4315a, and the second outer sleeve 4322a is movably inserted into the first outer sleeve 4316a. This structure is beneficial for providing a relatively closed internal cavity for the installation of the second elastic member 20a, improving assembly compactness.

[0079] For ease of assembly, a vertically extending limiting mounting groove 4317a is provided on the side wall of the first outer sleeve 4315a, and an elastic buckle 4323a is provided on the side wall of the second outer sleeve 4322a, which can guide and cooperate with the limiting mounting groove 4317a and be constrained in the limiting mounting groove 4317a.

[0080] The lower end of the guide sleeve 43a is provided with a pressing part 434a that can pass through the return water inlet 13a to press the cover 5a downwards. This structure facilitates the simultaneous pressing of the cover 5a and the connection between the return water pipe 14a and the guide sleeve 43a after the bowl rack 100a is placed into the sink body 1a. The pressing part 434a includes four guide arms 4341a extending from the inner wall of the lower end of the guide sleeve 43a downwards towards the center, and the lower ends of each guide arm 4341a are smoothly connected by a ring 4342a. While pressing the cover 5a, the guide arms 4341a also serve to guide the water in the middle of the return water pipe 14a into the guide sleeve 43a, reducing energy loss.

[0081] 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 water tank body (1), wherein 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), characterized in that: Also includes The water return pipe (14) has a water return port (13) located next to the drain outlet (11) at the bottom of the water tank body (1). The water return pipe (14) is located outside the water tank body (1) and is used to connect the drain chamber (12) and the water return port (13). The cover (5) is movable up and down at the return water inlet (13) and is used to open or close the return water inlet (13); The elastic element (9) keeps the cover (5) moving upward to close the return water inlet (13); The spray arm (4) is detachably installed in the water tank body (1) and arranged corresponding to the return water inlet (13). When the spray arm (4) and the return water inlet (13) are connected by insertion, the cover (5) is pressed into the return water pipe (14) by the spray arm (4) so ​​that the spray arm (4) and the return water inlet (13) are connected. 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 elastic element (9). The inner bottom wall of the return water pipe (14) is provided with a positioning post (140) extending upwards corresponding to the return water port (13). Correspondingly, the lower part of the cover (5) is provided with a guide sleeve (54) that can be inserted into the positioning post (140). The elastic element (9) is 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 elastic element (9) abuts against the support (143), and the upper end abuts against the inner top wall of the guide sleeve (54); 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, and there is a smooth transition between the vertical part (141) and the horizontal part (142), and the positioning post (140) is located at the smooth transition between the vertical part (141) and the horizontal part (142).

2. The cleaning machine according to claim 1, characterized in that: The upper part of the return water pipe (14) is a vertical part (141) extending downwards from the corresponding return water inlet (13). The cover (5) is movable up and down in the vertical part (141), and the elastic element (9) is located at the bottom of the cover (5).

3. The cleaning machine according to claim 2, characterized in that: 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 the return water inlet (13) is closed. Below the filling part (51) is a stop block (52) that can abut against the bottom edge of the return water inlet (13).

4. The cleaning machine according to claim 3, characterized in that: A downwardly extending retaining ring (131) is provided at the edge of the return water inlet (13), and correspondingly, a sealing ring (53) that can cooperate with the inner wall of the retaining ring (131) is embedded on the outer peripheral wall of the filling part (51).

5. The cleaning machine according to any one of claims 1 to 4, characterized in that: The bottom wall of the spray arm (4) is provided with a water inlet (41) and a water guide sleeve (43) extending downward from the water inlet (41). The water guide sleeve (43) is detachably connected to the return water inlet (13). The side wall of the water guide sleeve (43) is also provided with a water inlet notch (431) that can be connected to the return water pipe (14).

6. The cleaning machine according to claim 5, characterized in that: At least two spaced support arms (432) are provided at the bottom edge of the water guide sleeve (43). The gap between two adjacent support arms (432) constitutes the water inlet gap (431). When the spray arm (4) and the return water port (13) are assembled, the lower end of the support arm (432) presses against the upper wall of the cover (5). The support arm (432) is connected to the edge of the return water port (13) for limiting. The water inlet gap (431) is located in the return water pipe (14) below the return water port (13).

7. The cleaning machine according to claim 6, characterized in that: The support arm (432) has a vertically extending opening (433), and an elastic locking foot (434) extending upward from the lower edge is provided in the opening (433). The upper end of the elastic locking foot (434) has a locking block (435) that can engage with the lower edge of the return water inlet (13).

8. The cleaning machine according to claim 5, characterized in that: The outer peripheral wall of the water guide sleeve (43) is provided with a lower retaining ring (436) that can abut against the inner bottom wall of the water tank body (1) when the spray arm (4) and the return water port (13) are assembled.

9. The cleaning machine according to any one of claims 1 to 4, characterized in that: 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).

10. The cleaning machine according to claim 9, characterized in that: 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).

11. The cleaning machine according to claim 9, characterized in that: 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).

12. The cleaning machine according to any one of claims 1 to 4, characterized in that: The lower water chamber (12) and the return water pipe (14) are connected by a return water drive mechanism (3).

13. The cleaning machine according to claim 12, characterized in that: 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).

14. The cleaning machine according to claim 13, characterized in that: 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.

15. The cleaning machine according to claim 14, characterized in that: 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.

16. The cleaning machine according to claim 15, characterized in that: 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).

17. The cleaning machine according to claim 16, characterized in that: 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.

18. The cleaning machine according to claim 16, characterized in that: 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.

19. The cleaning machine according to any one of claims 1 to 4, characterized in that: 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).

20. The cleaning machine according to any one of claims 1 to 4, characterized in that: 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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