Garbage filter boxes and pool cleaning robots

Abstract

This utility model discloses a trash filter box and a swimming pool cleaning robot. The trash filter box includes: a box body with a receiving cavity, a suction port on the box body connecting the receiving cavity to the outside, and a filter frame inside the receiving cavity. The filter frame includes filter holes for filtering dirt, a filter screen covering the filter holes, and a pressure regulating hole on the filter frame. The pressure regulating hole is covered with an elastic seal with pre-stress. The swimming pool cleaning robot using this utility model's trash filter box can efficiently clean trash in relatively clear water, and can also clean trash in complex water environments with a lot of algae, silt, or other conditions that easily cause filter clogging, while maintaining a certain suction power to ensure the swimming pool cleaning robot's ability to climb walls and clean.

Description

Technical Field

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

[0002] As a core piece of equipment for pool maintenance, pool cleaning robots typically consist of a roller brush, a filter box, and a water pump forming the core flow channel components. During operation, the water pump provides negative pressure, driving the pool water flow to carry debris (such as leaves, sand, algae, and silt) through the roller brush and into the filter box. The water is then purified by the filter screen inside the filter box before being discharged, while the debris is trapped by the filter screen, thus achieving the pool cleaning function.

[0003] However, existing pool cleaning robots have significant technical flaws in their filter cartridges: in pool environments rich in fine particulate pollutants such as algae and silt, these particles easily adhere to and clog the filter pores under water pressure, leading to a sharp increase in flow resistance in the suction circuit. This results in a significant decrease in the effective suction power of the water pump, drastically reducing the robot's ability to capture debris. Furthermore, since the robot's wall-climbing cleaning function relies on the negative pressure suction generated by the water pump, the suction power reduction caused by filter clogging directly leads to a loss of wall-climbing stability, or even the inability to complete the wall-climbing operation, severely impacting the comprehensiveness and efficiency of pool cleaning. Therefore, solving the problems of reduced suction power and wall-climbing failure caused by filter clogging has become a critical technical bottleneck that existing pool cleaning robots urgently need to overcome. Utility Model Content

[0004] This utility model aims to overcome at least one of the defects of the prior art and provides a garbage filter box and a pool cleaning robot to solve the problems of reduced suction power and failure of wall climbing ability of pool cleaning robots caused by filter clogging in the prior art.

[0005] The technical solution adopted by this utility model is as follows: A garbage filter box includes: a box body with a receiving cavity, a suction port disposed on the box body and communicating the receiving cavity with the outside, and a filter frame disposed in the receiving cavity; the filter frame includes filter holes for filtering dirt, a filter screen covering the filter holes, and a pressure regulating hole disposed on the filter frame, wherein the pressure regulating hole is covered with an elastic seal with pre-compression stress.

[0006] 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.

[0007] 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.

[0008] 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.

[0009] In one embodiment, the wall thickness of the folded portion is less than the wall thickness of the mating portion.

[0010] In one embodiment, one side of the folded portion is a curved groove.

[0011] In one embodiment, the pressure regulating hole is located at the upper end of the filter frame.

[0012] 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.

[0013] In one embodiment, the preload stress of the elastic seals on different pressure regulating holes may be the same or different.

[0014] A pool cleaning robot includes a robot body and a trash filter box as described in any of the preceding claims; the robot body includes a water pump and a water outlet connected to the water pump; the water pump is connected to a receiving cavity of the trash filter box.

[0015] Compared with the prior art, the beneficial effects of this utility model include at least the following: 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 water conditions that are prone to clogging the filter, while maintaining a certain suction power to ensure the pool cleaning robot's ability to climb walls and clean.

[0016] Specifically, this technical solution achieves adaptive adjustment in the case of filter clogging by using a pressure regulating hole in the waste filter box in conjunction with an elastic seal with pre-stress. When the pool cleaning robot is cleaning in relatively clear water, the filter is less prone to clogging. When the filter is not clogged, the water pump operates, and water carrying debris such as leaves, sand, and stones enters the receiving cavity inside the box from the suction port. After being filtered through the filter holes and the filter screen, the water is discharged through the outlet under the drive of the water pump, while the sucked-in debris is trapped by the filter holes. Because 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.

[0017] 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's containment chamber. Under the pressure of the water flow, algae and silt particles quickly adhere to the filter screen, causing it to gradually become clogged. As the pump continues to operate normally, the more severe the clogging, the higher the water pressure within the containment chamber, and consequently, the greater the water 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, and the pressure regulating port automatically opens, forming a bypass channel. At this point, the water flow carries small, low-density debris out of the outlet under the action of the pump. Debris larger than the maximum aperture of the pressure regulating hole (such as leaves, branches, and large pebbles) cannot pass through 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 filter is clogged, the pool cleaning robot can still capture some debris in the pool, and due to the continued water suction, it also has the ability to climb walls. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the pool cleaning robot described in an embodiment of the present invention.

[0019] Figure 2 This is a cross-sectional view of the pool cleaning robot described in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the filter frame described in an embodiment of the present invention. Figure 1 .

[0021] Figure 4 This is a schematic diagram of the structure of the filter frame described in an embodiment of the present invention. Figure 2 .

[0022] Figure 5 This is a schematic diagram of the structure of the filter frame described in an embodiment of the present invention. Figure 3 .

[0023] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle.

[0024] 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. Detailed Implementation

[0025] 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.

[0026] like Figures 1-6 A garbage filter box 10 is shown, comprising: a box body 11 with a receiving cavity, a suction port 12 disposed on the box body 11 and communicating the receiving cavity with the outside, and a filter frame 13 disposed in the receiving cavity; the filter frame 13 includes a filter hole 131 for filtering dirt, a filter screen covering the filter hole 131, and a pressure regulating hole 132 disposed on the filter frame 13, the pressure regulating hole 132 being covered by an elastic sealing member 133 with pre-compression stress.

[0027] The pool cleaning robot using the trash filter box 10 of this embodiment can efficiently clean trash in relatively clear water, and can also clean trash in complex water environments with a lot of green algae, silt or other conditions that are prone to clogging the filter, while maintaining a certain suction power to ensure the pool cleaning robot's ability to climb walls and clean.

[0028] 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 under the condition of filter screen blockage. When the pool cleaning robot cleans in relatively clear water, the filter screen is not easily blocked. When the filter screen is not blocked, the water pump 21 operates, and the water carrying garbage such as leaves, sand, stones and other garbage 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 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.

[0029] 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 filter screen of the filter holes 131, causing the filter screen to gradually become clogged. The water pump 21 continues to operate normally. The more severe the clogging of the 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 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 also has the ability to climb walls.

[0030] The elastic sealing element 133 described in this embodiment can be a silicone or rubber elastic soft strip or an elastic plastic strip.

[0031] 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.

[0032] 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 filter screen or when the water pressure returns to less than the pre-compression stress, the elastic seal 133 can be re-covered to cover the pressure regulating hole 132.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] A pool cleaning robot includes a robot body 20 and a trash filter box 10 as described in any of the preceding claims; the robot body 20 includes a water pump 21 and a water outlet 22 communicating with the water pump 21; the water pump 21 is communicating with the receiving cavity of the trash filter box 10.

[0040] When the pool cleaning robot cleans in relatively clear water, the filter screen is not easily clogged. When the 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 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.

[0041] 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 filter screen of the filter holes 131, causing the filter screen to gradually become clogged. The water pump 21 continues to operate normally. The more severe the clogging of the 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 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 also has the ability to climb walls.

[0042] 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 trash filter cartridge characterized by, include: A housing with a receiving cavity, a suction port on the housing that connects the receiving cavity to the outside, and a filter frame inside the receiving cavity; the filter frame includes filter holes for filtering dirt, a filter screen covering the filter holes, and a pressure regulating hole on the filter frame, the pressure regulating hole being covered by an elastic seal with pre-stress.

2. The trash filter cartridge of claim 1, wherein, 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.

3. The trash filter cartridge of claim 1, wherein, 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.

4. The trash filter cartridge of claim 3, wherein, 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.

5. The trash filter cartridge of claim 4, wherein, The wall thickness of the folded portion is less than the wall thickness of the mating portion.

6. The trash filter cartridge of claim 5, wherein, One side of the folded section is curved and grooved.

7. The trash filter cartridge of claim 1, wherein, The pressure regulating hole is located at the upper end of the filter frame.

8. The garbage filter box according to any one of claims 1-7, 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.

9. The garbage filter box according to claim 8, characterized in that, The preload stress of the elastic seals on different pressure regulating holes may be the same or different.

10. A swimming pool cleaning robot, characterized in that, The system includes a robot body and a waste filter box as described in any one of claims 1-9; the robot body includes a water pump and a water outlet connected to the water pump; the water pump is connected to the receiving cavity of the waste filter box.

Images