Handheld swimming pool sewage suction machine

Abstract

The handheld swimming pool sewage suction machine comprises a machine body and a sewage suction head connected with the machine body, a first water pump, a filtering device, a second water pump, a main flow channel and a bypass channel are arranged in the machine body, the filtering device and the first water pump are at least partially located in the main flow channel, and the second water pump is at least partially located in the bypass channel; the first water pump can guide water flow to flow in from the first water inlet of the main flow channel, and the water flow is filtered by the filtering device and discharged from the machine body water outlet; the second water pump can guide water flow to flow into the main flow channel from the second water inlet of the bypass channel when the preset condition is met. The handheld swimming pool sewage suction machine can be started to work under different water depth conditions, and has the advantages of being flexible in operation, wide in application range and high in cleaning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pool sewage suction machines, in particular to a handheld pool sewage suction machine. BACKGROUND

[0002] In the field of pool cleaning and sewage treatment, impeller pumps are traditionally widely used as the core power source. The rotation of the internal blades will form a negative pressure area inside the pump body, thereby attracting the surrounding water flow and impurities into the pump body. However, due to the lack of lift capacity and the requirement for the impeller to be submerged in water, the application scenarios and design of the sewage suction machine are significantly limited. The handheld pool sewage suction machine has a high position of the impeller pump. When the water level in the pool is low, the water line is far away from the suction inlet of the impeller pump, so the impeller pump cannot directly suck water to start. Therefore, it cannot work effectively in shallow water, resulting in low cleaning efficiency and the existence of cleaning blind area. SUMMARY

[0003] In order to solve the problem that the handheld pool sewage suction machine in the prior art cannot work effectively in shallow water, resulting in low cleaning efficiency and the existence of cleaning blind area.

[0004] The present application provides a handheld pool sewage suction machine, comprising a machine body and a sewage suction head connected thereto, wherein the machine body is provided with a first water pump, a filtering device, a second water pump, a main flow channel and a bypass channel, the filtering device and the first water pump are at least partially located in the main flow channel, and the second water pump is at least partially located in the bypass channel.

[0005] The first water pump can guide the water flow to flow into the first water inlet of the main flow channel, and then the water flow is filtered by the filtering device and discharged from the water outlet of the machine body.

[0006] The second water pump can guide the water flow to flow into the main flow channel from the second water inlet of the bypass channel when a preset condition is met.

[0007] Further, the position of the second water inlet is lower than that of the first water pump.

[0008] Further, the preset condition at least includes one of the following situations:

[0009] 1) The control circuit of the second water pump receives a first signal that the water level in the pool or the water level in the main flow channel is less than a first threshold value;

[0010] 2) The control circuit of the second water pump receives a second signal that the second water pump is started or a start signal of the handheld pool sewage suction machine;

[0011] 3) The control circuit of the second water pump detects that the working current of the first water pump is less than a second threshold value or detects that the impeller of the first water pump is not submerged in water.

[0012] Further, the first threshold value is within 0.1-0.5m.

[0013] Further, a liquid level sensor is arranged in the main flow channel, and the first signal is generated by the liquid level sensor.

[0014] Further, the first water inlet is in communication with the suction port on the suction head.

[0015] Further, the second water inlet is arranged close to the second water pump.

[0016] Further, the filter device is detachably connected to the machine body.

[0017] Further, the second water pump is closed when at least one of the following conditions is met:

[0018] 1) the water level in the pool or the water level in the main flow channel is higher than the first threshold value;

[0019] 2) the handheld pool suction machine is started for a first predetermined time length or the second water pump is started for a second predetermined time length;

[0020] 3) the working current of the first water pump is detected to be greater than the second threshold value or the impeller of the first water pump is detected to be at least partially immersed in water.

[0021] Further, the bypass channel to the main flow channel forms a sealed channel.

[0022] The implementation of the present application has the following beneficial effects:

[0023] The present application sets a second water pump connected to the main flow channel through a bypass channel, which is used for the handheld pool suction machine in shallow water area. The second water pump pre-raises the water level of the main flow channel to enable the first water pump to smoothly suck water, so that the handheld pool suction machine can directly suck water from the relatively shallow water area, expand the operation range of the suction machine, enable it to start working under different water depth conditions, improve its operation flexibility and application range, and improve the cleaning efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0025] Figure 1 is a sectional view of a handheld pool suction machine according to an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of the flow direction of the water flow in the main flow channel of the embodiment of the present application;

[0027] Figure 3 is a sectional view of the first water pump and the filtering device of the embodiment of the present application;

[0028] Figure 4 is a structural schematic diagram of a handheld swimming pool sewage suction machine of the embodiment of the present application.

[0029] In the figure, the reference signs correspond to: the machine body 10, the sewage suction head 20, the sewage suction channel 201, the sewage suction port 202, the first water pump 1, the impeller 11, the filtering device 2, the dust collection box 21, the dust box water inlet 211, the filtering element 22, the second water pump 3, the main flow channel 4, the first water inlet 41, the containing cavity 42, the third water inlet 43, the main flow water outlet 44, the bypass channel 5, the second water inlet 51, the communication pipeline 52, the one-way valve 6, the machine body water outlet 7. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0031] In the description of the present application, it should be understood that the terms “up, down, in, out, top, bottom” and the like indicate the orientation or positional relationship shown in the drawings, or are directed to the components themselves in the vertical, perpendicular or gravitational direction, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms “first”, “second” are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by “first”, “second” can be explicitly or implicitly included one or more of the features.

[0032] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “part” or “component” appearing herein can refer to a single part or a combination of multiple parts. Terms such as “installation,” “setup,” and “connection” appearing herein should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can indicate that one component is directly attached to another component or that one component is attached to another component via an intermediate component; they can refer to the internal connection of two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. A feature described in one embodiment herein may be applied alone or in combination with other features to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0033] The following combination Figures 1-4 This application provides a handheld pool vacuum cleaner, which includes a body 10 and a suction head 20 connected thereto. The body 10 is provided with a first water pump 1, a filter device 2, a second water pump 3, a main channel 4 and a bypass channel 5. The filter device 2 and the first water pump 1 are at least partially located in the main channel 4, and the second water pump 3 is at least partially located in the bypass channel 5.

[0034] The first water pump 1 guides the water flow from the first inlet 41 of the main channel 4, and after being filtered by the filter device 2, it is discharged from the outlet 7 of the machine body.

[0035] The second water pump 3 can guide water flow from the second inlet 51 of the bypass channel 5 into the main channel 4 under preset conditions.

[0036] Specifically, the first water pump 1 is located above the filter device 2, and the main channel 4 is the main path for pool water circulation. The first water pump 1 draws pool water in from the first inlet 41 at the bottom of the body 10, and after being filtered by the filter device 2, it is discharged from the outlet 7 of the body.

[0037] In one possible implementation, the first water pump 1 is an impeller pump, which features high flow rate and high efficiency. However, impeller pumps lack head capacity, and the impeller 11 needs to be submerged in water to start operating, making them unsuitable for shallow water applications. To ensure that the impeller 11 of the first water pump 1 contacts the water for startup, a second water pump 3 is installed to draw water from the pool and deliver it to the main flow channel 4 via a bypass channel 5, thus providing the necessary conditions for the first water pump 1 to start.

[0038] The second water pump 3 is installed at the bottom or lower position of the body 10. In one possible embodiment, the second water pump 3 can be a submersible pump with a head distance greater than 0.5m, so it can handle the working environment of shallow water areas of 0.3m and below, and has high pumping efficiency and low operating noise.

[0039] In this embodiment, by placing the second water pump 3 at a lower position and connecting it to the main channel 4 via the bypass channel 5, the second water pump 3 pre-draws water to raise the water level in the main channel 4 when the handheld pool vacuum cleaner is in shallow water, allowing the first water pump 1 to smoothly draw water. This enables the handheld pool vacuum cleaner to directly draw water from shallower water areas, expanding the vacuum cleaner's operating range and allowing it to start working under different water depth conditions. This improves its operational flexibility and applicability, and increases cleaning efficiency.

[0040] Furthermore, a sealed channel is formed between the bypass channel 5 and the main channel 4. Specifically, a connecting pipe 52 is provided in the bypass channel 5, and the outlet of the second water pump 3 is connected to the main channel 4 through the connecting pipe 52.

[0041] Furthermore, the second water inlet 51 is located near the second water pump 3. In one possible embodiment, the second water inlet 51 is an independent water inlet, located near the second water pump 3 to facilitate water intake by the second water pump 3. Specifically, the second water inlet 51 can be located on the outer wall of the body 10, and the second water inlet 51 is connected to the water inlet of the second water pump 3.

[0042] Furthermore, the second water inlet 51 is positioned lower than the first water pump 1. The second water inlet 51 is located on the outer wall of the body 10. Its lower position allows for easier contact with the water surface in shallow areas, facilitating the start-up and operation of the second water pump 3 and enhancing the handheld pool vacuum cleaner's ability to operate in shallow water. Preferably, the second water inlet 51 is positioned lower than the first water pump 1 but higher than the suction head 20. The second water pump 3 draws water through the independent second water inlet 51, enabling it to effectively draw water in shallow areas while effectively avoiding direct contact with dirt and impurities deposited on the pool bottom.

[0043] Furthermore, the main channel 4 is provided with a receiving cavity 42, and a third water inlet 43 is provided on the side wall of the receiving cavity 42. The third water inlet 43 is connected to the outlet of the second water pump 3 through a connecting pipe 52. The impeller 11 of the first water pump 1 is located in the receiving cavity 42.

[0044] Furthermore, the receiving cavity 42 is provided with a main water outlet 44, which is connected to the outer wall of the body 10 to form the body water outlet 7.

[0045] The filtration device 2 includes a dust collection box 21 and a filter element 22. The filter element 22 is disposed inside the dust collection box 21, and the receiving cavity 42 communicates with the inner cavity of the filter element 22. In this embodiment, the water entering the filtration device 2 is filtered by the filter element 22 and then discharged through the main water outlet 44 on the receiving cavity 42 and the body water outlet 7. The bottom of the dust collection box 21 is provided with a dust box water inlet 211, which communicates with the first water inlet 41.

[0046] Furthermore, the filter device 2 is detachably connected to the body 10. The filter device 2 can be detachably connected to the body 10 via structures including, but not limited to, snap-fit ​​and threaded connections. In one possible embodiment, the dust collection box 21 can be configured as a front-opening type. The body 10 has at least one mounting structure, and the edge of the dust collection box 21 has a corresponding mounting fit structure. During installation, the mounting fit structure of the dust collection box 21 is aligned with the mounting structure of the body 10, and the dust collection box 21 is pushed forward until the mounting structure and the mounting fit structure snap into place, achieving a secure connection. During disassembly, the dust collection box 21 can be pulled outward by pressing a button on the dust collection box 21 or the body 10, or by directly applying force. The mounting structure and mounting fit structure include, but are not limited to, snap-fit ​​grooves and snap-fit ​​protrusions, and snap-hook grooves and snap-hooks. The detachable connection between the filter device 2 and the body 10 facilitates easy removal and cleaning of the filter components by the user, reduces maintenance difficulty, and improves the convenience of cleaning work.

[0047] Furthermore, the filter element 22 includes a pleated filter screen. The pleated filter screen design of the filter element 22 increases the surface area of ​​the filter screen, improving filtration efficiency and capacity. The pleated filter screen can more effectively capture and intercept impurities and particulate matter in the water flow, ensuring clearer water after cleaning. At the same time, the pleated structure also has a certain degree of elasticity and toughness, which can resist a certain degree of water flow impact and mechanical vibration, extending the service life of the filter element 22. In one possible embodiment, the pleated filter screen is a HEPA filter screen.

[0048] Furthermore, the first water inlet 41 is connected to the suction port 202 on the suction head 20. Specifically, the suction head 20 includes a suction channel 201 and a suction port 202, and the first water inlet 41 is connected to the suction port 202 through the suction channel 201. The suction port 202 may be located at the bottom of the suction head 20. In one possible embodiment, a one-way valve 6 is provided between the suction channel 201 and the dust collection box 21. The one-way valve 6 is configured to prevent sewage in the dust collection box 21 from flowing back into the suction channel 201 when the vacuum cleaner is not working. Preferably, the one-way valve 6 is located on the dust box water inlet 211.

[0049] Furthermore, the preset conditions that enable the second water pump 3 to guide water flow from the second inlet 51 of the bypass channel 5 into the main channel 4 include at least one of the following:

[0050] 1) The control circuit of the second water pump 3 receives a first signal that the water level in the pool or the water level in the main channel 4 is less than the first threshold. When the water level in the pool or the water level in the main channel 4 is detected by the level sensor to be lower than the preset first threshold, it indicates that the current water level in the main channel 4 does not meet the starting conditions of the first water pump 1, and therefore generates a first signal that can trigger the second water pump 3 to start.

[0051] 2) The control circuit of the second water pump 3 receives the start signal from the handheld pool vacuum cleaner or the second signal to start the second water pump 3. When the control circuit receives the start signal from the handheld pool vacuum cleaner or receives a signal that clearly indicates the start of the second water pump 3, i.e., the second signal, the control circuit will directly drive the second water pump 3 into the working state to ensure that the water level in the main channel 4 can reach the start water level of the first water pump 1.

[0052] 3) The control circuit of the second water pump 3 detects that the operating current of the first water pump 1 is less than the second threshold or that the impeller of the first water pump 1 is not submerged in water. The second water pump 3 also has an intelligent monitoring function, which can detect that the operating current of the first water pump 1 is lower than the set second threshold, or that the impeller of the first water pump 1 is not submerged in water. Once these situations are detected, it indicates that the current water level of the main channel 4 is insufficient to support its operation, and additional water flow is required. The control circuit then controls the second water pump 3 to start to maintain the stable operation of the handheld pool vacuum cleaner. Specifically, the control circuit can monitor the operating current of the first water pump 1 in real time through detection devices such as current sensors and compare it with the set second threshold; it can also indirectly or directly determine whether the impeller is submerged in water through various sensors, such as liquid level sensors, pressure sensors, or image recognition technology.

[0053] Further, the first threshold is within 0.1-0.5m. Optionally, the first threshold is within 0.2m-0.5m. Preferably, the first threshold can be 0.2m, 0.3m, or 0.4m. In this embodiment, the first threshold is set comprehensively based on the water suction performance of the first water pump 1, the layout of the main channel and bypass channel, and the minimum water level requirement of the swimming pool. Typically, by testing the water suction efficiency of the first water pump 1 at different water levels, the minimum water level value that ensures the effective operation of the first water pump 1 and maximizes the use of the second water pump 3 to raise the water level is set as the first threshold.

[0054] Furthermore, a level sensor is installed within the main channel 4, and the first signal is generated by the level sensor. Specifically, the level sensor can be installed in the main channel 4 or at an appropriate location within the pool to monitor water level changes in real time. When the water level in the pool or the main channel 4 drops below a first threshold, the level sensor outputs a first signal to the control system of the handheld pool vacuum cleaner, thereby controlling the start of the second water pump 3. In one possible implementation, the level sensor is located within the dust collection box 21 or the filter element 22. The level sensor includes, but is not limited to, float-type level sensors, capacitive level sensors, and ultrasonic level sensors.

[0055] In this embodiment, the second threshold is the lower limit of the normal range of the operating current of the first water pump 1. The setting of the second threshold is based on the rated current and actual operating efficiency of the first water pump motor. When the operating current of the first water pump 1 is lower than this value, it usually means that the first water pump 1 is not fully immersed in water or the water flow is insufficient.

[0056] Furthermore, the second water pump 3 shuts off when at least one of the following conditions is met:

[0057] 1) The water level in the pool or the main channel 4 is higher than the first threshold. When the level sensor detects that the water level in the pool or the main channel 4 is higher than the first threshold, it indicates that the water level in the pool or the main channel 4 meets the starting conditions of the first water pump 1. The level sensor outputs a signal to the control system of the handheld pool vacuum cleaner, and the second water pump 3 is turned off.

[0058] 2) The handheld pool vacuum cleaner is started for a first predetermined time or the second water pump 3 is started for a second predetermined time. When the handheld pool vacuum cleaner is started and runs continuously for the first predetermined time, the second water pump 3 is controlled to stop working. If the second water pump 3 is started due to insufficient water level in the pool, insufficient water level in the main channel 4, the operating current of the first water pump 1 being less than the second threshold, or the impeller of the first water pump 1 being detected not being submerged in water, the second water pump 3 will automatically shut down after running continuously for the second predetermined time to avoid energy consumption and wear caused by excessive operation.

[0059] This embodiment tests the changes in water level within the filter device 2 at different time intervals after the handheld pool vacuum is turned on. The shortest time required for the water level in the filter device 2 to reach the level required to start the first water pump 1 is determined and set as the first preset duration. After the first preset duration, the water level in the filter device 2 is stable and sufficient to support the normal operation of the first water pump 1. The second preset duration is the maximum permissible time for the second water pump 3 to operate continuously under specific abnormal conditions. After the maximum permissible time of continuous operation under these abnormal conditions, if the second water pump 3 continues to operate, it may not only fail to provide sufficient water flow to the filter device 2, but may also overheat, wear, or even be damaged due to insufficient water flow for cooling or lubrication.

[0060] 3) The operating current of the first water pump 1 is detected to be greater than the second threshold or the impeller of the first water pump 1 is detected to be at least partially submerged in water. If the operating current of the first water pump 1 is detected to return to the normal level, i.e., greater than the second threshold, or it is confirmed that the impeller of the first water pump is fully or partially submerged in water, it indicates that the water flow in the main channel is sufficient and stable, and the second water pump 3 will automatically shut down.

[0061] This embodiment utilizes the assistance of the second water pump 3 to enable the first water pump 1 to start normally, solving the problem that the first water pump 1 cannot directly draw water in shallow areas. By intelligently controlling the start and stop of the second water pump 3, the water level in the main channel 4 is kept stable, ensuring that the first water pump 1 always operates under optimal conditions. This improves the overall cleaning efficiency of the pool, enhances the overall stability and reliability of the system, and increases the system's automation level. By accurately determining when to activate the second water pump 3, unnecessary energy waste is avoided. By adjusting parameters such as the first threshold, the handheld pool vacuum cleaner can be flexibly applied to pool cleaning scenarios of different sizes and water levels.

[0062] Obviously, the embodiments described above are merely some of the embodiments in this specification, and not all of them. Based on the embodiments in this specification, those skilled in the art can make other variations or modifications without creative effort, and all such variations should fall within the scope of protection of the embodiments in this specification.

[0063] Other embodiments of the embodiments disclosed herein will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the embodiments thereof that follow the general principles of the embodiments thereof and include common knowledge or customary techniques in the art not disclosed in the embodiments thereof. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments thereof are indicated by the following claims.

[0064] It should be understood that the embodiments described herein are not limited to the precise structures already described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments described herein is limited only by the appended claims.

Claims

1. A hand-held pool cleaner comprising: The hand-held swimming pool cleaner comprises a machine body (10) and a suction head (20) connected to the machine body (10), wherein the machine body (10) is provided with a first water pump (1), a filter device (2), a second water pump (3), a main flow channel (4) and a bypass channel (5), the filter device (2) and the first water pump (1) are at least partially located in the main flow channel (4), and the second water pump (3) is at least partially located in the bypass channel (5). The first water pump (1) can guide water flow to flow into the main flow channel (4) from a first water inlet (41) and be discharged from a water outlet (7) of the machine body (10) after being filtered by the filter device (2). The second water pump (3) can guide water flow to flow into the main flow channel (4) from a second water inlet (51) of the bypass channel (5) when a preset condition is met.

2. A hand held pool cleaner according to claim 1, wherein, The second water inlet (51) is located lower than the first water pump (1).

3. A hand held pool cleaner as claimed in claim 1 wherein, The preset condition at least includes one of the following conditions: 1) a first signal that a water level in a swimming pool or a water level in the main flow channel (4) is less than a first threshold value is received by a control circuit of the second water pump (3); 2) a second signal that a start-up signal of the hand-held swimming pool cleaner or the second water pump (3) is received by the control circuit of the second water pump (3); 3) a working current of the first water pump (1) is less than a second threshold value or the impeller of the first water pump (1) is not immersed in water, which is detected by the control circuit of the second water pump (3).

4. A hand held pool cleaner according to claim 3, wherein, The first threshold value is within 0.1-0.5 m.

5. A hand held pool cleaner as claimed in claim 3 wherein, A liquid level sensor is arranged in the main flow channel (4), and the first signal is generated by the liquid level sensor.

6. A hand held pool cleaner as defined in claim 1 wherein, The first water inlet (41) is in communication with a suction port (202) on the suction head (20).

7. A hand held pool cleaner as claimed in claim 2 wherein, The second water inlet (51) is arranged close to the second water pump (3).

8. A hand held pool cleaner as defined in claim 1 wherein, The filter device (2) is detachably connected to the machine body (10).

9. A hand held pool cleaner as defined in claim 3 wherein, The second water pump (3) is closed when at least one of the following conditions is met: 1) a water level in a swimming pool or a water level in the main flow channel (4) is higher than the first threshold value; 2) the hand-held swimming pool cleaner is started up for a first predetermined time length or the second water pump (3) is started up for a second predetermined time length; 3) a current of the first water pump (1) is greater than the second threshold value or the impeller of the first water pump (1) is at least partially immersed in water.

10. A hand held pool cleaner as claimed in any one of claims 1 to 9, wherein, A sealed channel is formed between the bypass channel (5) and the main flow channel (4).

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