Series-parallel connection switching structure for fluid, fluid pump and pool cleaner

Abstract

The invention relates to a series-parallel connection switching structure for fluid, a fluid pump and a pool cleaner, the series-parallel connection switching structure comprises a first cavity, a second cavity and a switching mechanism, the first cavity is provided with a first water inlet, and the second cavity is provided with a second water inlet; a first channel is arranged between the first cavity and the second cavity, an inlet of the first channel is communicated with the first cavity, an outlet of the first channel is communicated with the second cavity, and the first channel is provided with a first water outlet communicated with the outside; a second water outlet is formed in the second cavity; the switching mechanism is used for controlling opening and closing of the first water outlet, opening and closing of the outlet of the first channel and opening and closing of the second water inlet. The series-parallel connection switching structure for the fluid, the fluid pump and the pool cleaner have the following advantages that switching of series connection and parallel connection between the first cavity and the second cavity can be achieved through the switching mechanism, and different working modes are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid transportation, and in particular to a series-parallel switching structure for fluid, a fluid pump and a pool cleaner. Background Art

[0002] In the prior art, Chinese invention patent publication No. CN112879308A discloses a multi-stage centrifugal pump comprising a pump body, a rotating shaft, a first impeller, a second impeller, a third impeller, and a switching mechanism. The pump body is rotatably connected to the rotating shaft. The first, second, and third impellers are fixedly connected to the rotating shaft in sequence from left to right. A first water intake is formed between the left side of the first impeller and the pump body, and a first water outlet is formed between the right side of the first impeller and the pump body. A second water intake is formed between the left side of the second impeller and the pump body, and a second water outlet is formed between the right side of the second impeller and the pump body. A third water intake is formed between the left side of the third impeller and the pump body, and a third water outlet is formed between the right side of the third impeller and the pump body. An inlet A is provided on the left side of the pump body, communicating with the first water intake; and an outlet B is provided on the right side of the pump body. However, this multi-stage centrifugal pump can only change the number of stages in series to achieve a change in head and is not suitable for high-flow operating conditions. Summary of the Invention

[0003] An object of the present application is to provide a series-parallel switching structure for fluid, a fluid pump, and a pool cleaner that can be applied in multiple modes.

[0004] The technical solution adopted in the present application is: a series-parallel switching structure for fluid, comprising a first cavity, a second cavity and a switching mechanism, wherein the first cavity is provided with a first water inlet, and the second cavity is provided with a second water inlet; a first channel is provided between the first cavity and the second cavity, the inlet of the first channel is connected to the first cavity, the outlet of the first channel is connected to the second cavity, the first channel is provided with a first water outlet connected to the outside; the second cavity is provided with a second water outlet; the switching mechanism is located between the first cavity and the second cavity; the switching mechanism is used to control the opening and closing of the first water outlet, the opening and closing of the outlet of the first channel, and the opening and closing of the second water inlet; in a parallel state, the first water outlet is in an open state, the outlet of the first channel is in a closed state, and the second water inlet is in an open state, and the fluid in the first cavity flows out through the first water outlet, and the fluid in the second cavity flows out through the second water outlet; in a series state, the first water outlet is in a closed state, the outlet of the first channel is in an open state, and the second water inlet is in a closed state, and the fluid in the first cavity flows out through the outlet of the first channel, the second cavity, and the second water outlet in sequence.

[0005] Compared with the existing technology, the advantage of the present application is that the switching between series and parallel connection between the first cavity and the second cavity can be realized through the switching mechanism, thereby realizing different working modes. In the parallel state, the external fluid enters the first cavity through the first water inlet and then flows out from the first water outlet on the first channel. At the same time, the external fluid also enters the second cavity through the second water inlet and then flows out from the second water outlet, realizing large flow operation; in the series state, the external fluid enters the first cavity through the first water inlet, then enters the second cavity from the outlet of the first channel, and finally flows out from the second water outlet, realizing high lift operation.

[0006] In some embodiments of the present application, the switching mechanism is a valve component, which is provided with a through second channel and a through third channel. In a parallel state, the first water outlet is connected to the second channel, the outlet of the first channel is blocked by the valve component, and the second water inlet is connected to the third channel; in a series state, the first water outlet is blocked by the valve component, the outlet of the first channel is connected to the third channel, and the second water inlet is blocked by the valve component.

[0007] Furthermore, the valve member is annular and can rotate relative to the second cavity. The first water outlet is arranged on the rotation path of the second channel, the second water inlet and the outlet of the first channel are arranged on the rotation path of the third channel, and the second water inlet and the outlet of the first channel are arranged adjacent to each other in the radial direction.

[0008] In some embodiments of the present application, a first shell is further included, wherein the first cavity is arranged in the first shell, part of the second cavity is arranged on the first shell, and the first cavity is located below the second cavity; the first water inlet is arranged on the lower surface of the first shell; the first channel is arranged in the first shell, and the outlet of the first channel is located above the inlet of the first channel; the first water outlet is arranged on the upper surface of the first shell; and the second water inlet is arranged on the side surface of the first shell.

[0009] Furthermore, it also includes a second shell, the second shell is connected to the first shell, the second cavity is arranged between the first shell and the second shell; the second water outlet is arranged on the side surface of the second shell.

[0010] In some embodiments of the present application, a first impeller is provided in the first cavity, the water inlet of the first impeller is connected to the first water inlet, and the water outlet of the first impeller is connected to the first cavity; a second impeller is provided in the second cavity, the water inlet of the second impeller is connected to the second water inlet, and the water outlet of the second impeller is connected to the second cavity.

[0011] Furthermore, the second cavity includes an upper cavity and a lower cavity, the second impeller is located in the upper cavity, the water inlet of the second impeller is connected to the lower cavity, the second water inlet and the outlet of the first channel are both located in the lower cavity, and the second water outlet is located in the upper cavity.

[0012] In some embodiments of the present application, the first cavity and the second cavity are located on the same axis.

[0013] Furthermore, the first channel includes a horizontal channel and an ascending channel, one end of the horizontal channel is connected to the first cavity, and the other end is connected to one end of the ascending channel, and the other end of the ascending channel is connected to the second cavity; an arc surface is provided between the horizontal channel and the ascending channel; the first water outlet is located in the ascending channel; and the horizontal channel has arc surfaces on both sides in the horizontal direction.

[0014] Furthermore, the valve component is provided with a toggle member extending outward, and the toggle member is used to drive the valve component to rotate.

[0015] Furthermore, at least two third channels are provided, and obliquely arranged blocking plates are provided between adjacent third channels. The blocking plates are used to block the outlet of the first channel or the second water inlet, and the shape of the outlet of the first channel and the shape of the second water inlet are coordinated with the blocking plates.

[0016] Furthermore, a first pressure differential notch and / or a second pressure differential notch is provided on the first shell, the first pressure differential notch is located at the outlet of the first channel, and a first pressure differential matching area is formed between the first pressure differential notch and the switching mechanism; the second pressure differential notch is located at the outer edge of the top surface of the first shell, and a second pressure differential matching area is formed between the second pressure differential notch and the switching mechanism.

[0017] A fluid pump includes the above-mentioned series-parallel switching structure for fluid and a first outer shell, wherein the first cavity and the second cavity are both located in the first outer shell, and the first outer shell is provided with a third water outlet and a third water inlet, wherein the third water outlet is connected to the first water outlet and the second water outlet, and the third water inlet is connected to the first water inlet and the second water inlet.

[0018] Furthermore, the first outer shell includes a base and an upper cover, the base and the upper cover are detachably connected, the third water inlet is located at the base, and the third water outlet is located at the upper cover.

[0019] A pool cleaner comprises the above-mentioned series-parallel switching structure for fluid and a second outer shell, wherein the first cavity and the second cavity are both located in the second outer shell, and the second outer shell is provided with a fourth water outlet and a fourth water inlet, wherein the fourth water outlet is connected to the first water outlet and the second water outlet, and the fourth water inlet is connected to the first water inlet and the second water inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of embodiment 1 of the present invention Figure 1 ; Figure 2 This is a schematic diagram of the structure of embodiment 1 of the present invention Figure 2 ; Figure 3 is a cross-sectional view of Example 1 of the present invention; Figure 4 is an exploded view of embodiment 1 of the present invention; Figure 5 1 is a schematic structural diagram of a valve member according to embodiment 1 of the present invention; Figure 6 is a structural schematic diagram of the first shell of Example 1 of the present invention; Figure 7 is a top view of the first housing of Example 1 of the present invention; Figure 8 yes Figure 7 Cross-sectional view in the AA direction; Figure 9 is a schematic structural diagram of embodiment 2 of the present invention; Figure 10 is a cross-sectional view of embodiment 2 of the present invention; Figure 11 is a schematic structural diagram of embodiment 3 of the present invention; Figure 12 is a cross-sectional view of Example 3 of the present invention; Figure 13 yes Figure 12 A magnified view of part B in FIG; Figure 14 is a schematic structural diagram of embodiment 4 of the present invention; Figure 15 1 is a schematic structural diagram of a valve member according to a fourth embodiment of the present invention; Figure 16 is a schematic structural diagram of a first housing according to embodiment 4 of the present invention; Figure 17 is a schematic structural diagram of embodiment 5 of the present invention; Figure 18 It is a cross-sectional view of Example 5 of the present invention.

[0021] In the figure: 1, first cavity; 101, first water inlet; 2, second cavity; 201, second water inlet; 202, second water outlet; 203, upper cavity; 204, lower cavity; 3, first channel; 301, first water outlet; 302, horizontal channel; 303, rising channel; 304, arc surface; 4, valve member; 401, second channel; 402, third channel; 403, toggle member; 404, blocking plate; 5, first shell; 501, first notch; 50 2. First pressure difference notch; 503. Second pressure difference notch; 6. Second shell; 701. First impeller; 702. Second impeller; 8. First outer shell; 801. Third water outlet; 802. Third water inlet; 803. Base; 804. Upper cover; 805. Second notch; 9. Wear-resistant assembly; 901. First wear-resistant part; 902. Second wear-resistant part; 10. Motor; 11. Second outer shell; 12. Fourth water outlet; 13. Fourth water inlet; 14. Third notch. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0023] Example 1:

[0024] This embodiment provides a fluid series-parallel switching structure, such as Figure 1-Figure 4As shown, it includes a first cavity 1, a second cavity 2 and a switching mechanism. The first cavity 1 is provided with a first water inlet 101, and the second cavity 2 is provided with a second water inlet 201; a first channel 3 is provided between the first cavity 1 and the second cavity 2, the inlet of the first channel 3 is connected to the first cavity 1, and the outlet of the first channel 3 is connected to the second cavity 2, and the first channel 3 is provided with a first water outlet 301 connected to the outside; the second cavity 2 is provided with a second water outlet 202; the switching mechanism is located between the first cavity 1 and the second cavity 2; the switching mechanism is used to control the opening and closing of the first water outlet 301, the opening and closing of the outlet of the first channel 3 and the opening and closing of the second water inlet 201; in the parallel state, the first water outlet 301 is in the open state, and the outlet of the first channel 3 is in the closed state. In the closed state, the second water inlet 201 is in the open state, the fluid in the first cavity 1 enters from the first water inlet 101 and flows out through the first water outlet 301, and the fluid in the second cavity 2 enters from the second water inlet 201 and flows out through the second water outlet 202; in the series state, the first water outlet 301 is in the closed state, the outlet of the first channel 3 is in the open state, and the second water inlet 201 is in the closed state, and the fluid in the first cavity 1 flows out through the outlet of the first channel 3, the second cavity 2 and the second water outlet 202 in sequence, that is, the fluid in the first cavity 1 enters from the first water inlet 101 and flows out through the first channel 3, and the fluid in the second cavity 2 enters from the first channel 3 and flows out through the second water outlet 202. In this embodiment, the first cavity 1 and the second cavity 2 are pump cavities. Of course, more cavities can be added to achieve more levels of series and parallel connections.

[0025] The switching mechanism can realize switching between series and parallel connection between the first cavity 1 and the second cavity 2, thereby realizing different working modes. In the parallel state, the external fluid enters the first cavity 1 through the first water inlet 101, and then flows out from the first water outlet 301 on the first channel 3. At the same time, the external fluid also enters the second cavity 2 through the second water inlet 201, and then flows out from the second water outlet 202, thereby realizing large flow operation; in the series state, the external fluid enters the first cavity 1 through the first water inlet 101, and then enters the second cavity 2 from the outlet of the first channel 3, and finally flows out from the second water outlet 202, thereby realizing high lift operation.

[0026] In order to switch reliably, Figure 5As shown, the switching mechanism is a valve component 4, which is provided with a through second channel 401 and a through third channel 402. In the parallel state, the first water outlet 301 is connected to the second channel 401, the outlet of the first channel 3 is blocked by the valve component 4, and the second water inlet 201 is connected to the third channel 402; in the series state, the first water outlet 301 is blocked by the valve component 4, the outlet of the first channel 3 is connected to the third channel 402, and the second water inlet 201 is blocked by the valve component 4. The second channel 401 is used to open the first water outlet 301. When the second channel 401 is connected to the first water outlet 301, the first water outlet 301 is in an open state, and when the first water outlet 301 is blocked by the valve component 4, it is in a closed state; the third channel 402 is used to switch the outlet of the first channel 3 and the second water inlet 201 on and off, that is, when the third channel 402 is connected to the outlet of the first channel 3, the second water inlet 201 is blocked by the valve component 4 and is in a closed state, and when the third channel 402 is connected to the second water inlet 201, the outlet of the first channel 3 is blocked by the valve component 4 and is in a closed state.

[0027] To ensure reliable switching, the valve member 4 is annular and rotatable relative to the second chamber 2. The first water outlet 301 is positioned along the rotational path of the second channel 401, and the second water inlet 201 and the outlet of the first channel 3 are positioned along the rotational path of the third channel 402. The second water inlet 201 and the outlet of the first channel 3 are radially adjacent. In this embodiment, there are five second water inlets 201, five first water outlets 301, five first channel 3, five second water outlets 202, and one first water inlet 101. The second water outlet 202, second water inlet 201, first water outlet 301, and the outlet of the first channel 3 are evenly distributed around the center of the second chamber 2. The series and parallel modes are switched by rotating the valve member 4, and the switching operation is simple and convenient. The rotation of the valve member 4 causes the second channel 401 and the third channel 402 to rotate synchronously, thereby allowing the second channel 401 to communicate with the first water outlet 301, and the third channel 402 to communicate with the outlet of the first channel 3 or the second water inlet 201; the second water inlet 201 is arranged adjacent to the outlet of the first channel 3, so that the third channel 402 can only communicate with one of the two.

[0028] For structural reliability, Figure 6 As shown, it also includes a first shell 5, a first cavity 1 is arranged in the first shell 5, and part of the second cavity 2 is arranged on the first shell 5, and the first cavity 1 is located below the second cavity 2; a first water inlet 101 is arranged on the lower surface of the first shell 5; a first channel 3 is arranged in the first shell 5, and the outlet of the first channel 3 is located above the inlet of the first channel 3; a first water outlet 301 is arranged on the upper surface of the first shell 5; and a second water inlet 201 is arranged on the side surface of the first shell 5.

[0029] For structural reliability, the device further includes a second housing 6 connected to the first housing 5, with the second cavity 2 disposed between the first and second housings 5, 6. A second water outlet 202 is disposed on a side surface of the second housing 6. A valve member 4 is disposed between the first and second housings 5, 6, and is rotatably connected to the first housing 5.

[0030] To ensure reliable fluid entry, a first impeller 701 is provided in the first cavity 1. The water inlet of the first impeller 701 is connected to the first water inlet 101, and the water outlet of the first impeller 701 is connected to the first cavity 1. A second impeller 702 is provided in the second cavity 2. The water inlet of the second impeller 702 is connected to the second water inlet 201, and the water outlet of the second impeller 702 is connected to the second cavity 2. The first impeller 701 and the second impeller 702 are driven by a motor 10. The design of the first impeller 701 can improve the fluid conveying capacity. The design of the second impeller 702, when connected in parallel, can synchronously convey fluid with the first impeller 701 to achieve a large flow rate. When working in series, the first impeller 701 and the second impeller 702 are arranged in two stages, which improves the head.

[0031] The inlet of the first channel 3 and the water outlet of the first impeller 701 are on the same horizontal plane, which facilitates the fluid brought out by the first impeller 701 to enter the first channel 3; the second water outlet 202 and the water outlet of the second impeller 702 are on the same horizontal plane, which facilitates the fluid brought out by the second impeller 702 to enter the second water outlet 202.

[0032] The first impeller 701 and the second impeller 702 are both provided with a wear-resistant component 9, which is used to reduce the friction loss caused by the rotation of the first impeller 701 and the second impeller 702 on the first shell 5, the second shell 6 and the valve component 4, thereby extending the service life; the wear-resistant component 9 is arranged between the first impeller 701 and the first shell 5, between the first impeller 701 and the valve component 4, and between the second impeller 702 and the second shell 6; the wear-resistant component 9 includes a first wear-resistant part 901 and a second wear-resistant part 902, the first wear-resistant part 901 is connected to the first impeller 701 or the second impeller 702, the second wear-resistant part 902 is connected to the first shell 5 or the second shell 6 or the valve component 4, and the first wear-resistant part 901 and the second wear-resistant part 902 are rotatably connected.

[0033] To ensure the reliability of the second chamber 2, the second chamber 2 includes an upper chamber 203 and a lower chamber 204. The second impeller 702 is located in the upper chamber 203. The water inlet of the second impeller 702 is connected to the lower chamber 204. The second water inlet 201 and the outlet of the first channel 3 are both located in the lower chamber 204. The second water outlet 202 is located in the upper chamber 203. The second impeller 702 separates the upper chamber 203 and the lower chamber 204, so that the vast majority of the fluid in the lower chamber 204 must pass through the second impeller 702 before entering the upper chamber 203. This ensures that most of the fluid is transported by the second impeller 702, ensuring the pressure and flow rate of the output fluid. The fluid also has a single movement path, making the flow more stable.

[0034] In order to reduce the volume, the first cavity 1 and the second cavity 2 are located on the same axis, and the first cavity 1 and the second cavity 2 are arranged up and down, which can reduce the overall volume.

[0035] For the reliability of the first channel 3, Figure 7 、 Figure 8 As shown, the first channel 3 includes a horizontal channel 302 and an ascending channel 303. One end of the horizontal channel 302 is connected to the first cavity 1, and the other end is connected to one end of the ascending channel 303. The other end of the ascending channel 303 is connected to the second cavity 2. A curved surface 304 is provided between the horizontal channel 302 and the ascending channel 303. The curved surface 304 can reduce the impact of the fluid in the horizontal channel 302 entering the ascending channel 303 and transport it more smoothly. The first water outlet 301 is located in the ascending channel 303. The horizontal channel 302 has curved surfaces on both sides in the horizontal direction. The curved surfaces can reduce the impact of the fluid entering the horizontal channel 302 and transport it more smoothly.

[0036] To facilitate rotation of the valve member 4, the valve member 4 is provided with an outwardly extending toggle member 403, which is used to drive the valve member 4 to rotate. The toggle member 403 extending outward is easier to operate and has a clear operating position. The first housing 5 is provided with a first notch 501, through which the toggle member 403 extends outward.

[0037] Example 2:

[0038] This embodiment provides a fluid pump, such as Figure 9 、 Figure 10As shown, it includes a series-parallel switching structure for fluid described in Example 1 or Example 4 and a first outer shell 8, the first cavity 1 and the second cavity 2 are both located in the first outer shell 8, and the first outer shell 8 is provided with a third water outlet 801 and a third water inlet 802, the third water outlet 801 is connected to the first water outlet 301 and the second water outlet 202, and the third water inlet 802 is connected to the first water inlet 101 and the second water inlet 201; the first outer shell 8 includes a base 803 and an upper cover 804, the base 803 and the upper cover 804 are detachably connected, the third water inlet 802 is located at the base 803, and the third water outlet 801 is located at the upper cover 804. The first and second housings 5 ​​and 6 are both disposed within the first outer housing 8; the motor 10 is disposed within the second housing 6; a water inlet cavity is formed between the base 803 and the first housing 5, communicating with the first and second water inlets 101 and 201; a water outlet passage is formed between the upper cover 804 and the second housing 6, through which water from the first and second water outlets 301 and 202 reaches the third water outlet 801. In this embodiment, the third water inlet 802 is a grille aperture distributed around the base 803 and serves as the main water inlet for the fluid pump.

[0039] To facilitate the rotation of the valve member 4, a second notch 805 is provided between the base 803 or the upper cover 804 or between the base 803 and the upper cover 804, through which the toggle member 403 extends out of the first outer shell 8. In this embodiment, the second notch 805 is provided between the base 803 and the upper cover 804.

[0040] Example 3:

[0041] This embodiment provides a pool cleaner, such as Figure 11 、 Figure 12 、 Figure 13 The device comprises a series-parallel switching structure for fluids as described in Example 1 or Example 4 and a second outer shell 11. The first chamber 1 and the second chamber 2 are both located within the second outer shell 11. The second outer shell 11 is provided with a fourth water outlet 12 and a fourth water inlet 13. The fourth water outlet 12 communicates with the first water outlet 301 and the second water outlet 202, while the fourth water inlet 13 communicates with the first water inlet 101 and the second water inlet 201. In this embodiment, the fourth water inlet 13 serves as the main water inlet for the pool cleaner. The first shell 5 and the second shell 6 are both located within the second outer shell 11; the motor 10 is located within the second shell 6; a water outlet channel is formed between the second outer shell 11 and the second shell 6, through which water from the first water outlet 301 and the second water outlet 202 reaches the fourth water outlet 12. The fourth water outlet 12 is located at the top end of the second outer shell 11, and the fourth water inlet 13 is located at the bottom end of the second outer shell 11. The second outer shell 11 is provided with a third notch 14 for the shifting member 403 to extend out.

[0042] Example 4:

[0043] This embodiment provides a fluid series-parallel switching structure, such as Figure 14-16 As shown, in addition to the features described in Example 1, at least two third channels 402 are provided, and obliquely arranged blocking plates 404 are provided between adjacent third channels 402. The blocking plates 404 are used to block the outlet of the first channel 3 or the second water inlet 201. The shapes of the outlet of the first channel 3 and the second water inlet 201 match the blocking plates 404. Specifically, the blocking plates 404 can completely fit with the outlet of the first channel 3, that is, form a sealing surface to block the outlet of the first channel 3, and the blocking plates 404 can also completely fit with the second water inlet 201, that is, form a sealing surface to block the second water inlet 201. In this embodiment, the blocking plates 404 are inclined surfaces, but of course, the blocking plates 404 can also be curved surfaces.

[0044] The design of the blocking plate 404 can ensure reliable blocking; the blocking plate 404 is arranged obliquely, which can guide the liquid, making the liquid flow smoother, and the inclined surface can also increase the water outlet area.

[0045] In order to improve the sealing effect, a first pressure differential notch 502 is provided on the first shell 5, and the first pressure differential notch 502 is located at the outlet of the first channel 3. A first pressure differential matching area is formed between the first pressure differential notch 502 and the valve component 4, and the valve component 4 can float up and down in the axial direction; a second pressure differential notch 503 is provided on the first shell 5, and the second pressure differential notch 503 is located at the outer edge of the top surface of the first shell 5, and a second pressure differential matching area is formed between the second pressure differential notch 503 and the valve component 4.

[0046] When the fluid pump is working, there is positive pressure above the valve component 4 and negative pressure below the valve component 4. The valve component 4 will be pressed against the first shell 5 by the water pressure difference to form a seal, which can prevent foreign objects from entering and getting stuck, causing the valve component 4 to fail. The design of the first pressure difference notch 502 increases the area of ​​the pressure difference on the valve component 4, thereby improving the sealing effect. The first pressure difference notch 502 is located on the inside, which has a good sealing effect on the inside. The design of the second pressure difference notch 503 increases the area of ​​the pressure difference on the valve component 4, thereby improving the sealing effect. The second pressure difference notch 503 is located on the outside, which has a good sealing effect on the outside.

[0047] Example 5:

[0048] This embodiment provides a handheld vacuuming and blowing dual-purpose device, such as Figure 17 、 Figure 18 As shown, it includes a fluid series-parallel switching structure as described in Example 1 or Example 4.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A series-parallel switching structure for fluid, characterized in that: The invention comprises a first cavity (1), a second cavity (2) and a switching mechanism, wherein the first cavity (1) is provided with a first water inlet (101), and the second cavity (2) is provided with a second water inlet (201); a first channel (3) is provided between the first cavity (1) and the second cavity (2); an inlet of the first channel (3) is communicated with the first cavity (1), and an outlet of the first channel (3) is communicated with the second cavity (2); a first water outlet (301) is provided on the first channel (3); and a second water outlet (202) is provided on the second cavity (2); the switching mechanism is located at the first cavity (1). Between the first cavity (1) and the second cavity (2); the switching mechanism is used to control the opening and closing of the first water outlet (301), the opening and closing of the outlet of the first channel (3), and the opening and closing of the second water inlet (201); in a parallel state, the first water outlet (301) is in an open state, the outlet of the first channel (3) is in a closed state, and the second water inlet (201) is in an open state; in a series state, the first water outlet (301) is in a closed state, the outlet of the first channel (3) is in an open state, and the second water inlet (201) is in a closed state.

2. The series-parallel switching structure for fluid according to claim 1, characterized in that: The switching mechanism is a valve component (4), and the valve component (4) is provided with a through second channel (401) and a through third channel (402). In a parallel state, the first water outlet (301) is communicated with the second channel (401), the outlet of the first channel (3) is blocked by the valve component (4), and the second water inlet (201) is communicated with the third channel (402); in a series state, the first water outlet (301) is blocked by the valve component (4), the outlet of the first channel (3) is communicated with the third channel (402), and the second water inlet (201) is blocked by the valve component (4).

3. The series-parallel switching structure for fluid according to claim 2, characterized in that: The valve member (4) is annular and can rotate relative to the second cavity (2). The first water outlet (301) is arranged on the rotation path of the second channel (401). The second water inlet (201) and the outlet of the first channel (3) are arranged on the rotation path of the third channel (402). The second water inlet (201) and the outlet of the first channel (3) are arranged adjacent to each other in the radial direction.

4. The series-parallel switching structure for fluid according to claim 1, characterized in that: The invention further comprises a first shell (5), wherein the first cavity (1) is arranged in the first shell (5), a portion of the second cavity (2) is arranged on the first shell (5), and the first cavity (1) is located below the second cavity (2); the first water inlet (101) is arranged on the lower surface of the first shell (5); the first channel (3) is arranged in the first shell (5), and the outlet of the first channel (3) is located above the inlet of the first channel (3); the first water outlet (301) is arranged on the upper surface of the first shell (5); and the second water inlet (201) is arranged on the side surface of the first shell (5).

5. The series-parallel switching structure for fluid according to claim 4, characterized in that: It also includes a second shell (6), the second shell (6) is connected to the first shell (5), the second cavity (2) is arranged between the first shell (5) and the second shell (6), and the second water outlet (202) is arranged on the side surface of the second shell (6).

6. The series-parallel switching structure for fluid according to claim 1, characterized in that: A first impeller (701) is provided in the first cavity (1), the water inlet of the first impeller (701) is communicated with the first water inlet (101), and the water outlet of the first impeller (701) is communicated with the first cavity (1); a second impeller (702) is provided in the second cavity (2), the water inlet of the second impeller (702) is communicated with the second water inlet (201), and the water outlet of the second impeller (702) is communicated with the second cavity (2).

7. The series-parallel switching structure for fluid according to claim 6, characterized in that: The second cavity (2) comprises an upper cavity (203) and a lower cavity (204); the second impeller (702) is located in the upper cavity (203); the water inlet of the second impeller (702) is in communication with the lower cavity (204); the second water inlet (201) and the outlet of the first channel (3) are both located in the lower cavity (204); and the second water outlet (202) is located in the upper cavity (203).

8. The series-parallel switching structure for fluid according to claim 1, characterized in that: The first cavity (1) and the second cavity (2) are located on the same axis.

9. The series-parallel switching structure for fluid according to claim 4, characterized in that: The first channel (3) comprises a horizontal channel (302) and an ascending channel (303); one end of the horizontal channel (302) is in communication with the first cavity (1), and the other end is in communication with one end of the ascending channel (303); the other end of the ascending channel (303) is in communication with the second cavity (2); an arcuate surface (304) is provided between the horizontal channel (302) and the ascending channel (303); the first water outlet (301) is located in the ascending channel (303); and both sides of the horizontal channel (302) are arcuate surfaces in the horizontal direction.

10. The series-parallel switching structure for fluid according to claim 3, characterized in that: The valve member (4) is provided with a toggle member (403) extending outward, and the toggle member (403) is used to drive the valve member (4) to rotate.

11. The series-parallel switching structure for fluid according to claim 2, characterized in that: At least two third channels (402) are provided, and obliquely arranged blocking plates (404) are provided between adjacent third channels (402). The blocking plates (404) are used to block the outlet of the first channel (3) or the second water inlet (201), and the shapes of the outlet of the first channel (3) and the second water inlet (201) are matched with the blocking plates (404).

12. The series-parallel switching structure for fluid according to claim 4, characterized in that: The first shell (5) is provided with a first pressure difference notch (502) and / or a second pressure difference notch (503); the first pressure difference notch (502) is located at the outlet of the first channel (3); a first pressure difference matching area is formed between the first pressure difference notch (502) and the switching mechanism; and the second pressure difference notch (503) is located at the outer edge of the top surface of the first shell (5); a second pressure difference matching area is formed between the second pressure difference notch (503) and the switching mechanism.

13. A fluid pump, characterized in that: The invention comprises a series-parallel switching structure for fluid according to any one of claims 1 to 12 and a first outer shell (8), wherein the first cavity (1) and the second cavity (2) are both located in the first outer shell (8), and the first outer shell (8) is provided with a third water outlet (801) and a third water inlet (802), wherein the third water outlet (801) is communicated with the first water outlet (301) and the second water outlet (202), and the third water inlet (802) is communicated with the first water inlet (101) and the second water inlet (201).

14. A fluid pump according to claim 13, characterized in that: The first outer shell (8) comprises a base (803) and an upper cover (804), the base (803) and the upper cover (804) are detachably connected, the third water inlet (802) is located on the base (803), and the third water outlet (801) is located on the upper cover (804).

15. A pool cleaner, characterized in that: The invention comprises a series-parallel switching structure for fluid according to any one of claims 1 to 12 and a second outer shell (11), wherein the first cavity (1) and the second cavity (2) are both located in the second outer shell (11), and the second outer shell (11) is provided with a fourth water outlet (12) and a fourth water inlet (13), wherein the fourth water outlet (12) is communicated with the first water outlet (301) and the second water outlet (202), and the fourth water inlet (13) is communicated with the first water inlet (101) and the second water inlet (201).

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