A pool cleaning robot

Abstract

The utility model relates to a kind of pool cleaning robot, including robot body and rubbish filter box, robot body includes water pump, the water outlet being communicated with water pump, and the water outlet is communicated with rubbish filter box;Rubbish filter box is equipped with containing cavity, filter frame is equipped in box body, filter frame includes filter hole for filtering dirt, first filter screen, which is covered on filter hole, and pressure regulating structure, which is arranged on filter frame, is used to close in the first filter screen is not blocked state, and is conducted in the first filter screen blocked state;It further includes filter assembly located outside pressure regulating structure. Pool cleaning robot with the rubbish filter box of filter assembly of the utility model can efficiently clean garbage in the scene where water quality is relatively clear, can also clean garbage in complex water quality environment where more green algae, silt or other conditions are easy to cause the first filter screen to be blocked, prevent microparticle backflow from affecting cleaning force while maintaining certain suction, and ensure the wall cleaning ability of pool cleaning robot.

Description

Technical Field

[0001] This utility model relates to the field of underwater cleaning, and more specifically, to a swimming pool cleaning robot. Background Technology

[0002] Pool cleaning robots, as essential equipment for daily pool maintenance, typically consist of core components such as a drive mechanism, roller brush, filter box, and water pump. The filter box, located in the middle of the flow channel, is the key unit for collecting and separating debris from the water. During operation, the water pump generates negative pressure, drawing pool water along with various types of debris, including leaves, sand, algae, and silt, into the flow channel. After initial cleaning and agitation by the roller brush, the water enters the filter box. Inside the filter box is a first filter screen. Under the continuous flow of water, larger debris is intercepted and retained within the box, while the water, initially purified by the first filter screen, is discharged back into the pool through the outlet. This creates a cycle of wastewater intake, filtration, and discharge, achieving pool water cleaning. Existing robots primarily focus on the interception function of the filter box, relying on the pore size of the first filter screen and the box structure to control the particle size of retained debris, ensuring that large particles do not flow back with the purified water, thereby maintaining pump suction and unobstructed flow. The liquid portion before it is discharged from the filter box is generally considered to have been purified by the first filter and does not require further treatment. This approach forms the basis of the current mainstream product's technical solution.

[0003] However, existing pool cleaning robots have significant shortcomings in the design and use of their filter cartridges. While related technologies generally mention the use of a first filter within the cartridge to filter inhaled materials, little attention is paid to the effectiveness of this first filter and the risk of secondary pollution in the discharged liquid. In actual operation, fine particulate pollutants such as algae and silt easily adhere to and clog the pores of the first filter under the pressure and viscosity of water flow, causing increased flow resistance and reduced pump suction – this is a known problem. A deeper deficiency lies in the fact that when the first filter is partially clogged or slightly damaged, some fine particles can bypass the interception with the purified water and directly enter the filter cartridge outlet, being discharged back into the pool. This means the discharged material has not undergone a second filtration. Existing technologies do not include a re-filtration structure or mechanism at the filter cartridge outlet, neglecting the adverse effects of potentially residual fine pollutants in the discharged liquid on pool water quality, and failing to prevent the secondary release of particles when the first filter fails. Therefore, the lack of consideration for re-filtration of the contents discharged from the filter box not only reduces the thoroughness of cleaning, but may also affect the hygiene of the pool and the stability of the robot's long-term operation due to repeated circulation of pollutants. Utility Model Content

[0004] The present invention aims to overcome at least one of the defects of the prior art and provide a swimming pool cleaning robot to solve the problem of incomplete filtration in existing swimming pool cleaning robots.

[0005] The present invention employs a swimming pool cleaning robot, comprising a robot body and a waste filter box. The robot body includes a water pump and a water outlet connected to the water pump. The water outlet of the water pump is connected to the waste filter box for discharging water into the waste filter box. The waste filter box has a receiving cavity, a suction port located on the box body and connecting the receiving cavity to the outside, and a filter frame located inside the box body. The filter frame includes filter holes for filtering dirt, a first filter screen covering the filter holes, and a pressure regulating structure located on the filter frame. The pressure regulating structure is used to close when the first filter screen is not blocked and to open when the first filter screen is blocked. It also includes a filter assembly located on the filter frame and outside the pressure regulating structure, the filter assembly being used to filter the wastewater discharged from the waste filter box.

[0006] In one embodiment, the filter assembly includes a second filter screen and a fixing frame, the fixing frame being attached to the filter holder by snap-fit ​​and / or removed from the filter holder by snap-fit, the second filter screen covering the fixing frame.

[0007] In one embodiment, the mesh count of the second filter is greater than that of the first filter.

[0008] In one embodiment, the pressure regulating structure includes a pressure regulating hole and an elastic seal, the pressure regulating hole being disposed on the filter frame and the elastic seal having a pre-stressed coating covering the outside of the pressure regulating hole.

[0009] In one embodiment, the elastic seal is curved or bent in the absence of external force, and the side that is in contact with the pressure regulating hole is the side with the curved or bent convex surface.

[0010] In one embodiment, the resilient seal includes a connection portion at one end connected to the filter frame, and the free end of the resilient seal is pressed against the pressure regulating hole by pre-compression stress.

[0011] In one embodiment, the resilient seal includes a fitting portion covering the pressure regulating hole and a folded portion disposed between the fitting portion and the connecting portion.

[0012] In one embodiment, the wall thickness of the folded portion is less than the wall thickness of the mating portion; one side of the folded portion is a curved groove.

[0013] In one embodiment, the pressure regulating hole is located at the upper end of the filter frame.

[0014] In one embodiment, the number of pressure regulating holes is at least two sets, and each of the at least two sets of pressure regulating holes is covered with an independent elastic seal.

[0015] In one embodiment, the preload stress of the elastic seals on different pressure regulating holes may be the same or different.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This technical solution improves the filtration effect of wastewater by installing a filter component at the outlet of the waste filter box, thereby further filtering the wastewater discharged from the waste filter box. At the same time, it avoids the situation where particles flow back into the pool with the discharged liquid when the first filter screen in the waste filter box is clogged, thus thoroughly removing pollutants and enabling the robot to operate continuously and efficiently in a variable water quality environment.

[0017] In addition, the filter assembly of this technical solution is equipped with a disassembly and assembly component, which can install the filter assembly on the garbage filter box and / or remove it from the garbage filter box to clean and replace the second filter screen in a timely manner and avoid clogging of the first filter screen.

[0018] The garbage filter box and pool cleaning robot of this technical solution can efficiently clean up garbage in relatively clear water, and can also clean up garbage in complex water environments with a lot of green algae, silt or other conditions that are prone to clogging the first filter, while maintaining a certain suction power to ensure the pool cleaning robot's ability to climb walls and clean.

[0019] Specifically, this technical solution achieves adaptive adjustment when the first filter screen is clogged by cooperating with a pressure regulating hole in the garbage filter box and an elastic seal with pre-stress. When the pool cleaning robot is cleaning in relatively clear water, the first filter screen is less prone to clogging. When the first filter screen is not clogged, the water pump operates, and water carrying garbage such as leaves, sand, and stones enters the receiving cavity inside the box from the suction port. After the water is filtered through the filter holes and the first filter screen, it is discharged through the outlet under the drive of the water pump, while the garbage sucked in is intercepted by the filter holes. Since the water can flow smoothly through the filter holes, the water pressure on the pressure regulating hole is relatively small in this state. That is, the outward force caused by the water pressure at the pressure regulating hole is less than the pre-stress of the elastic seal. The elastic seal always maintains a sealed covering state for the pressure regulating hole, and the pressure regulating hole is not conductive.

[0020] When the pool cleaning robot operates in water rich in algae, silt, and other fine debris, the water pump runs continuously. Water carrying various debris (including algae, silt, leaves, sand, and stones) enters the debris filter chamber. Under water pressure, algae and silt particles quickly adhere to the first filter screen, causing it to gradually become clogged. As the pump continues to operate, the more severe the clogging of the first filter, the higher the water pressure within the chamber, and consequently, the greater the pressure at the pressure regulating port. When the outward force caused by the water pressure at the pressure regulating port exceeds the pre-stress of the elastic seal, the elastic seal flips outward, automatically opening the pressure regulating port and creating a bypass channel. At this point, the water flow carries small, low-density debris out of the outlet under the action of the water pump; debris larger than the maximum aperture of the pressure regulating hole (such as leaves, branches, and large pebbles) cannot pass through the pressure regulating hole and remains trapped in the containment chamber; debris with higher density but smaller than the maximum aperture of the pressure regulating hole (such as coarse sand) generally sinks quickly to the bottom of the containment chamber when sucked in due to the reduced water pressure, and also does not leak out through the pressure regulating hole. Therefore, even when the first filter is clogged, the pool cleaning robot can still capture some debris in the pool, and due to the continued water suction, it still has the ability to climb walls. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the pool cleaning robot described in an embodiment of the present invention. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of the garbage filter box described in an embodiment of the present invention.

[0023] Figure 3 This is an assembly diagram of the garbage filter box and filter assembly described in an embodiment of this utility model.

[0024] Figure 4 This is a cross-sectional view of the pool cleaning robot described in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the filter frame described in an embodiment of the present invention. Figure 1 .

[0026] Figure 6 This is a schematic diagram of the structure of the filter frame described in an embodiment of the present invention. Figure 2 .

[0027] Figure 7 This is a schematic diagram of the structure of the filter frame described in an embodiment of the present invention. Figure 3 .

[0028] Figure 8 for Figure 7A magnified view of a portion of point A in the middle.

[0029] Figure 9 This is a structural diagram of the filter assembly described in an embodiment of the present invention.

[0030] Figure 10 This is a structural diagram of the fixed frame described in an embodiment of the present invention.

[0031] Reference numerals: 10, garbage filter box; 11, box body; 12, suction port; 13, filter frame; 131, filter hole; 132, pressure regulating hole; 133, elastic seal; 20, robot body; 21, water pump; 22, water outlet; 30, filter assembly; 31, fixing frame; 311, window pane; 32, second filter screen. Detailed Implementation

[0032] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this invention. To better illustrate the following embodiments, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0033] Example 1 like Figures 1-10 The swimming pool cleaning robot shown includes a robot body 20 and a waste filter box 10. The robot body 20 includes a water pump 21 and a water outlet 22 connected to the water pump 21. The water outlet 22 of the water pump 21 is connected to the waste filter box 10 for discharging water into the waste filter box 10. The waste filter box 10 has a box body 11 with a receiving cavity, a suction port 12 on the box body 11 that connects the receiving cavity to the outside, and a filter frame 13 disposed in the receiving cavity. The filter frame 13 includes filter holes 131 for filtering dirt, a first filter screen covering the filter holes 131, and an adjustment mechanism on the filter frame 13. The pressure regulating structure is used to close when the first filter screen is not clogged and to allow flow when the first filter screen is clogged. The pressure regulating structure includes a pressure regulating hole 132 and an elastic seal 133. The pressure regulating hole 132 is disposed on the filter frame 13, and the outside of the pressure regulating hole 132 is covered by an elastic seal 133 with pre-compression stress. It also includes a filter assembly 30 disposed at the outlet of the garbage filter box 10. More precisely, the filter assembly 30 covers the outside of the pressure regulating hole 132 and is located between the pressure regulating hole 132 and the outlet of the water pump 21. The filter assembly 30 is used to filter the sewage discharged from the garbage filter box 10, thus solving the problem that the pool water flowing out through the pressure regulating hole is not filtered.

[0034] The filter assembly 30 includes a fixed frame 31, a second filter screen 32, and a disassembly assembly 33. The fixed frame 31 consists of multiple vertical and horizontal supports, which work together to form a fixed frame 31 with multiple pores 311. The second filter screen 32 is sized to match the fixed frame 31 and covers the fixed frame 31. The second filter screen 32 is removable and can be replaced when damaged. A second filter screen with smaller pores can also be selected as needed. The mesh size of the second filter screen 32 is larger than that of the first filter screen, enabling it to filter finer particles. The fixed frame 31 is installed on the filter holder 13 by clips and / or removed from the filter holder 13 by clips. When the second filter screen 32 becomes clogged, the clips are opened to remove the fixed frame 31, and the second filter screen 32 is cleaned to prevent particle backflow from affecting the cleaning effect.

[0035] The pool cleaning robot using the trash filter box 10 of this embodiment can efficiently clean trash in relatively clear water, and it can also clean trash in complex water environments with a lot of algae, silt, or other conditions that easily cause the first filter to clog. It maintains a certain suction power to ensure the robot's ability to climb walls and clean. Furthermore, the filter assembly at the outlet of the trash filter box 10 further filters the contents of the box, preventing particles from flowing back into the pool with the discharged liquid when the first filter in the box becomes clogged.

[0036] Specifically, in this embodiment, the pressure regulating hole 132 in the garbage filter box 10 cooperates with the elastic seal 133 with pre-compression stress to achieve adaptive adjustment when the first filter screen is clogged. When the pool cleaning robot cleans in relatively clear water, the first filter screen is not easily clogged. When the first filter screen is not clogged, the water pump 21 operates, and the water carrying garbage such as leaves, sand, and stones enters the receiving cavity in the box body 11 from the suction port 12. After the water is filtered by the filter hole 131 and the first filter screen, it is discharged through the outlet 22 under the driving action of the water pump 21, while the garbage sucked in is intercepted by the filter hole 131. Since the water can flow smoothly through the filter hole 131, the water pressure on the pressure regulating hole 132 is small in this state. That is, the outward force caused by the water pressure at the pressure regulating hole 132 is less than the pre-compression stress of the elastic seal 133. The elastic seal 133 always maintains a sealed covering state on the pressure regulating hole 132, and the pressure regulating hole 132 is not conductive.

[0037] When the pool cleaning robot operates in water rich in algae, silt, and other fine debris, the water pump 21 continuously operates, carrying water containing various debris (including algae, silt, leaves, sand, or stones) into the containment chamber of the debris filter box 10. Under the pressure of the water flow, algae and silt particles quickly adhere to the first filter screen of the filter hole 131, causing the first filter screen to gradually become clogged. As the water pump 21 continues to operate normally, the more severe the clogging of the first filter screen, the higher the water pressure in the containment chamber, and the greater the water pressure at the pressure regulating hole 132. When the outward force caused by the water pressure at the pressure regulating hole 132 exceeds the pre-compression stress of the elastic seal 133, the elastic seal 133 flips outward, and the pressure regulating hole 132 automatically opens, forming a bypass channel. At this time, the water flow carries small, low-density debris out of the outlet 22 under the action of the water pump 21; while debris larger than the maximum aperture of the pressure regulating hole 132 (such as leaves, branches, large stones, etc.) cannot pass through the pressure regulating hole 132 and remains trapped in the receiving cavity; debris with higher density but smaller than the maximum aperture of the pressure regulating hole 132 (such as coarse sand) generally sinks quickly to the bottom of the receiving cavity when sucked in due to the decrease in water pressure, and also will not leak out through the pressure regulating hole 132. Therefore, even when the first filter screen is clogged, the pool cleaning robot can still capture some debris in the pool, and due to the continued water suction, it still has the ability to climb walls. In addition, since the second filter screen 32 is located outside the pressure regulating hole 132, under normal circumstances when it is not clogged, the second filter screen 32 can also perform a filtering function when the pressure regulating hole 132 is not open.

[0038] The elastic sealing element 133 described in this embodiment can be a silicone or rubber elastic soft strip or an elastic plastic strip.

[0039] In this embodiment, the elastic seal 133 is curved or bent in the absence of external force (i.e., in its free state when not installed at the pressure regulating hole 132), and the side that is in close contact with the pressure regulating hole 132 is the side with the curved or bent convex surface. That is, the pre-compression stress of the elastic seal 133 when covering the pressure regulating hole 132 is formed by bending or folding.

[0040] The elastic seal 133 described in this embodiment includes a connecting portion connected to the filter frame 13 at one end, and the free end of the elastic seal 133 is pressed tightly against the pressure regulating hole 132 by pre-compression stress. Thus, the elastic seal 133 can be used multiple times; after cleaning the first filter screen or when the water pressure returns to below the pre-compression stress, the elastic seal 133 can be re-covered over the pressure regulating hole 132.

[0041] The elastic seal 133 described in this embodiment also includes a fitting portion covering the pressure regulating hole 132, and a folded portion disposed between the fitting portion and the connecting portion. When the outward folding force caused by the water pressure at the pressure regulating hole 132 is greater than the pre-compression stress of the elastic seal 133, the fitting portion folds upward along the position of the folded portion, that is, the folded portion is a hinge point for elastic flipping.

[0042] In this embodiment, the wall thickness of the folded portion is less than the wall thickness of the adhesive portion, so as to form a weak area that is easy to bend outward.

[0043] Specifically, one side of the folding section is shaped like a curved groove, and the opening direction of the curved groove is consistent with the water flow direction. By setting the curved groove, stress concentration is avoided, thereby extending the service life of the folding section and reducing the risk of breakage caused by frequent folding during long-term use.

[0044] In this embodiment, the pressure regulating hole 132 is located at the upper end of the filter frame 13, thereby better preventing the waste deposited in the receiving cavity from leaking out through the pressure regulating hole 132.

[0045] In this embodiment, the number of pressure regulating holes 132 is at least two sets, and each of the at least two sets of pressure regulating holes 132 is covered with an independent elastic seal 133. The independent elastic seal 133 matches a single set of pressure regulating holes 132, which can be opened independently, improving the product's fault tolerance. That is, when one or more elastic seals 133 cannot be opened for any reason, the other elastic seals 133 can still be used normally.

[0046] Furthermore, the pre-compression stress of the elastic seals 133 on different pressure regulating holes 132 can be set differently, or the pre-compression stress can be set in a gradient. That is, as the water pressure at the pressure regulating hole 132 increases with the degree of blockage, the elastic seals 133 with different pre-compression stresses can open one by one as the water pressure increases. Of course, the pre-compression stress of the elastic seals 133 on different pressure regulating holes 132 can also be set to the same, so that when the water pressure increases, all elastic seals 133 open simultaneously.

[0047] When the pool cleaning robot cleans in relatively clear water, the first filter screen is not easily clogged. When the first filter screen is not clogged, the water pump 21 operates, and the water carrying debris such as leaves, sand, and stones enters the receiving cavity inside the housing 11 from the suction port 12. After the water is filtered through the filter hole 131 and the first filter screen, it is discharged through the outlet 22 under the drive of the water pump 21, while the sucked-in debris is intercepted by the filter hole 131. Since the water can flow smoothly through the filter hole 131, the water pressure on the pressure regulating hole 132 is relatively small in this state. That is, the outward force caused by the water pressure at the pressure regulating hole 132 is less than the pre-compression stress of the elastic seal 133. The elastic seal 133 always maintains a sealed covering state on the pressure regulating hole 132, and the pressure regulating hole 132 is not open.

[0048] When the pool cleaning robot operates in water rich in algae, silt, and other fine debris, the water pump 21 continuously operates, carrying water containing various debris (including algae, silt, leaves, sand, or stones) into the containment chamber of the debris filter box 10. Under the pressure of the water flow, algae and silt particles quickly adhere to the first filter screen of the filter hole 131, causing the first filter screen to gradually become clogged. As the water pump 21 continues to operate normally, the more severe the clogging of the first filter screen, the higher the water pressure in the containment chamber, and the greater the water pressure at the pressure regulating hole 132. When the outward force caused by the water pressure at the pressure regulating hole 132 exceeds the pre-compression stress of the elastic seal 133, the elastic seal 133 flips outward, and the pressure regulating hole 132 automatically opens, forming a bypass channel. At this point, the water flow carries small, low-density debris out of the outlet 22 under the action of the water pump 21. Debris larger than the maximum aperture of the pressure regulating hole 132 (such as leaves, branches, and large pebbles) cannot pass through the pressure regulating hole 132 and remains trapped in the receiving cavity. Debris with higher density but smaller than the maximum aperture of the pressure regulating hole 132 (such as coarse sand) generally sinks quickly to the bottom of the receiving cavity when it is sucked in due to the reduced water pressure, and also will not leak out through the pressure regulating hole 132. Therefore, even when the first filter screen is clogged, the pool cleaning robot can still capture some debris in the pool, and because the water suction force is still present, it still has the ability to climb walls.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the technical solution of this utility model, and are not intended to limit the specific implementation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A swimming pool cleaning robot, characterized in that, The system includes a robot body and a waste filter box. The robot body includes a water pump and a water outlet connected to the water pump. The water outlet of the water pump is connected to the waste filter box for discharging water into the waste filter box. The waste filter box has a receiving cavity, a suction port located on the box body and connecting the receiving cavity to the outside, and a filter frame located inside the box body. The filter frame includes filter holes for filtering dirt, a first filter screen covering the filter holes, and a pressure regulating structure located on the filter frame. The pressure regulating structure is used to close when the first filter screen is not blocked and to open when the first filter screen is blocked. The system also includes a filter assembly located on the filter frame and outside the pressure regulating structure. The filter assembly is used to filter the wastewater discharged from the waste filter box.

2. The swimming pool cleaning robot according to claim 1, characterized in that, The filter assembly includes a second filter screen and a fixing frame, the fixing frame being mounted on the filter holder by snaps and / or being removed from the filter holder by snaps, the second filter screen covering the fixing frame.

3. A swimming pool cleaning robot according to claim 2, characterized in that, The mesh count of the second filter is greater than that of the first filter.

4. A swimming pool cleaning robot according to claim 1, characterized in that, The pressure regulating structure includes a pressure regulating hole and an elastic seal. The pressure regulating hole is disposed on the filter frame, and the elastic seal with pre-stress is covered on the outside of the pressure regulating hole.

5. A swimming pool cleaning robot according to claim 4, characterized in that, The elastic seal is curved or bent in the absence of external force, and the side that is in close contact with the pressure regulating hole is the side with the curved or bent convex surface.

6. A swimming pool cleaning robot according to claim 4, characterized in that, The elastic seal includes a connecting part that is connected to the filter frame at one end, and the free end of the elastic seal is pressed against the pressure regulating hole by pre-compression stress.

7. A swimming pool cleaning robot according to claim 6, characterized in that, The elastic seal includes a fitting portion covering the pressure regulating hole, and a folded portion disposed between the fitting portion and the connecting portion.

8. A swimming pool cleaning robot according to claim 7, characterized in that, The wall thickness of the folded portion is less than the wall thickness of the mating portion; one side of the folded portion is a curved groove.

9. A swimming pool cleaning robot according to claim 4, characterized in that, The pressure regulating hole is located at the upper end of the filter frame.

10. A swimming pool cleaning robot according to any one of claims 4-8, characterized in that, The number of pressure regulating holes is at least two sets, and each of the at least two sets of pressure regulating holes is covered with an independent elastic seal.

11. A swimming pool cleaning robot according to claim 10, characterized in that, The preload stress of the elastic seals on different pressure regulating holes may be the same or different.

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