A water pump, a flushing system and a toilet

Abstract

The utility model relates to a kind of water pump, flushing system and closestool, water pump includes pump body, motor and impeller, motor is connected on pump body, motor can rotate along first direction or second direction, first direction and second direction are opposite, first direction is clockwise direction or counterclockwise direction;Pump body is equipped with pump cavity, first water outlet, second water outlet and water inlet, first water outlet, second water outlet and water inlet are all communicated pump cavity;The orientation of first water outlet is the water flow direction when motor rotates along first direction;Impeller is built into pump cavity, and motor drives impeller to rotate along first direction or rotate along second direction;Impeller includes several blades, blade is evenly distributed around the axial circumference of impeller, blade is arranged in arc shape, and the arc vault direction of blade is the water flow direction when motor rotates along first direction.The utility model can realize different water outlet mode by controlling the forward and reverse rotation of motor, control is convenient, and structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of sanitary ware technology, and in particular to a water pump, a flushing system and a toilet. Background Technology

[0002] Toilet flushing generally includes draining water and washing the walls of the toilet bowl. Currently, most smart toilets use a water pump to supply water, with the pump located at the bottom of the toilet tank.

[0003] Due to customer demand, some toilets require different flushing modes, such as separate flushing and drainage, or flushing followed by simultaneous flushing and drainage. Based on existing pump structures, the approaches are essentially threefold: 1. Dedicated pumps for drainage and flushing, with timed operation of the two pumps; 2. Single pump with two outlets, using an internal on / off mechanism to control the timed water flow; 3. Also single pump with two outlets, with an external electronic switching valve for timed water flow control. Approach 1 results in higher equipment costs, higher power consumption, and larger toilet tank space. Approaches 2 and 3 also suffer from increased equipment costs and more complex pump structures, leading to more potential failure points. Utility Model Content

[0004] The purpose of this invention is to provide a water pump, a flushing system, and a toilet, which can achieve different water output modes by controlling the forward and reverse rotation of the motor. It is easy to control and has a simple structure.

[0005] To achieve the above objectives, this utility model discloses a water pump, which includes a pump body, a motor, and an impeller. The motor is connected to the pump body and can rotate in a first direction or a second direction. When the first direction is clockwise, the second direction is counterclockwise; when the first direction is counterclockwise, the second direction is clockwise. The pump body is provided with a pump chamber, a first outlet, a second outlet, and an inlet, all of which are connected to the pump chamber. The first outlet is oriented in the direction of water flow when the motor rotates in a first direction, and the opening of the first outlet is parallel to the tangent direction of the outer edge of the pump chamber closest to it, or at an angle α to the tangent direction, wherein the angle α ≤ 30°. The diameter of the first outlet is not less than 14mm. The impeller is built into the pump chamber, and the motor drives the impeller to rotate in a first direction or in a second direction; the impeller includes a plurality of blades, which are evenly distributed around the axial circumference of the impeller, and the blades are arranged in an arc shape, with the arc-shaped dome of the blades facing the direction of water flow when the motor rotates in the first direction.

[0006] With the above settings, as long as the orientation of the second outlet differs from the water flow direction when the motor rotates in the first direction (for example, the orientation of the second outlet is the water flow direction when the motor rotates in the second direction), in this case, when the motor rotates in the first direction, the first outlet can discharge water at a high flow rate, while the second outlet discharges water at a low flow rate or not at all. When the motor rotates in the second direction, the first outlet discharges water at a low flow rate or not at all, while the second outlet discharges water at a high flow rate. Furthermore, the water flow rate can be further adjusted by changing the motor speed, the diameter of the first outlet, and the diameter of the second outlet. Therefore, this invention can achieve water discharge control of different outlets simply by controlling the forward and reverse rotation of the motor. Control is convenient, and the opening and closing of the outlets does not require additional on / off structures, resulting in a simpler structure and lower manufacturing and maintenance costs for the water pump. Additionally, by setting the impeller blades to an arc shape with the arc-shaped dome facing the water flow direction when the motor rotates in the first direction, the water discharge from the first outlet is smoother and the water discharge power is stronger when the motor rotates in the first direction.

[0007] Preferably, the impeller further includes a first connecting plate and a second connecting plate, with the blades fixedly connected between the first and second connecting plates. The first connecting plate has an opening facing the water inlet, one end of the blade is positioned near the opening, and the other end of the blade is aligned with the outer edges of the first and second connecting plates. The second connecting plate is fixedly connected to the rotor of the motor. By setting the first and second connecting plates, the structural stability of the blades can be ensured, thereby guaranteeing the pumping power. The opening on the first connecting plate facing the water inlet also facilitates pumping.

[0008] Preferably, the side of the first connecting plate away from the second connecting plate is further provided with an arc-shaped guide ring, and the arc-shaped guide ring is arranged around the opening; the pump body is provided with a limiting groove adapted to the arc-shaped guide ring, and the limiting groove is arranged around the water inlet, and the arc-shaped guide ring is inserted into the limiting groove. The arc-shaped guide ring facilitates the guidance of water flow into the pump chamber, and the interlocking cooperation between the arc-shaped guide ring and the limiting ring can stabilize the position of the impeller, which helps to ensure stable water output.

[0009] Preferably, the arc angle of the blade is θ, and the thickness of the blade is d, then 0° < θ < 90°, and d ≥ 1 mm; the spacing between any two adjacent blades increases in the direction away from the impeller's rotation center. This arrangement facilitates water pumping.

[0010] Preferably, the pump body includes a pump casing, an end cover, and an outlet cover. The lower end of the pump casing is detachably and sealed to the outlet cover, and the pump chamber is formed between the pump casing and the outlet cover. The first outlet, the second outlet, and the inlet are all located on the outlet cover. The pump casing has a first mounting cavity with an upward opening and a second mounting cavity with a downward opening. The first mounting cavity surrounds the outer periphery of the second mounting cavity, and the first mounting cavity and the second mounting cavity are not interconnected. The stator of the motor is placed in the first mounting cavity, and the end cover is connected to the upper end of the pump casing and seals the first mounting cavity. The second mounting cavity communicates with the pump chamber, and the rotor of the motor is placed in the second mounting cavity. A connecting frame is provided in the inlet, and the bottom of both the connecting frame and the second mounting cavity has an assembly hole adapted to the motor shaft. The end of the motor shaft is inserted into the assembly hole. With this configuration, the pump assembly is simple and convenient, and it also facilitates later maintenance. By setting mounting holes to connect the motor shaft, the motor rotor can be stabilized well, and the walls of the first and second mounting cavities are less susceptible to impact.

[0011] Preferably, the motor shaft is rotatably fitted with the mounting hole, and the motor rotor is fixedly connected to the shaft; or, the motor shaft is anti-rotating fitted with the mounting hole, and the motor rotor is rotatably connected to the shaft.

[0012] Preferably, the opening of the second outlet is parallel to the tangent direction of the outer edge of the pump chamber closest to it, or is set at an angle α to the tangent direction, wherein the angle α ≤ 30°, and the orientation of the second outlet is the direction of water flow when the motor rotates in the second direction; in this way, the second outlet can output a large flow of water when the motor rotates in the second direction, and output a small flow of water or no water when the motor rotates in the first direction. Alternatively, the opening of the second outlet is set at an angle β to the tangent direction of the corresponding outer edge of the pump chamber, wherein 30° < β ≤ 60°, which ensures that the second outlet can output water when the motor rotates in either the first or second direction.

[0013] This utility model also discloses a flushing system, which includes a water storage container, a drain pipe, a washing pipe, and the aforementioned water pump. The water pump is located at the bottom of the inner cavity of the water storage container, or the water pump is located outside the water storage container, and the water inlet of the water pump is connected to the bottom of the inner cavity of the water storage container. The first water outlet is connected to the drain pipe, and the second water outlet is connected to the washing pipe. With the above configuration, different flushing modes can be controlled by controlling the forward and reverse rotation of the motor, such as washing and draining at different times, or washing and draining simultaneously. Since the water pump is located outside the water storage container and is no longer immersed in water, the waterproofing requirements are lower, and a water pump with a lower waterproof rating can be selected to reduce equipment costs.

[0014] Preferably, at least the drainage pipe is provided with an anti-siphon inlet, and the anti-siphon inlet is set higher than the working water level of the water storage container. This arrangement prevents water waste caused by a siphon effect in the drainage pipe (and the washing pipe) when the water pump stops.

[0015] In addition, this utility model also discloses a toilet that uses the above-mentioned flushing system.

[0016] This utility model has the following beneficial effects: This invention allows for water output control at different outlets simply by controlling the forward and reverse rotation of the motor. Control is convenient, and no additional on / off structure is needed for the outlets, resulting in a simpler structure and lower manufacturing and maintenance costs for the pump. Furthermore, by designing the impeller blades in an arc shape with the arched apex facing the direction of water flow when the motor rotates in the first direction, water flow from the first outlet is smoother and more powerful when the motor rotates in that direction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of Example 1.

[0018] Figure 2 This is a schematic diagram from another perspective of Embodiment 1.

[0019] Figure 3 This is a cross-sectional view of Example 1.

[0020] Figure 4 This is a schematic diagram of the impeller and rotor in Example 1.

[0021] Figure 5 This is a cross-sectional view from another perspective of Embodiment 1.

[0022] Figure 6 This is a schematic diagram of the water outlet cover in Example 1.

[0023] Figure 7 This is a schematic diagram of the water pump's outlet in Example 1 (the motor rotates in the first direction).

[0024] Figure 8 This is a schematic diagram of the water pump's outlet in Example 1 (the motor rotates in the second direction).

[0025] Figure 9 This is a schematic diagram of the water pump in Example 2.

[0026] Figure 10 This is a schematic diagram of the water outlet cover in Example 2.

[0027] Figure 11 This is a cross-sectional view of the water outlet cover in Embodiment 2.

[0028] Figure 12This is a schematic diagram of the water pump outlet in Example 2 (the motor rotates in the first direction).

[0029] Figure 13 This is a schematic diagram of the water pump outlet in Example 2 (the motor rotates in the second direction).

[0030] Note: Figure 3 The stator of the motor is hidden inside; Figure 5 The arrow in the image indicates the direction in which the curved dome of the blade faces; Figure 7 , 8 The arrows in 12 and 13 represent water flow.

[0031] Explanation of symbols for main components: Pump casing 11, end cover 12, outlet cover 13, pump chamber 14, first outlet 15, second outlet 16, inlet 17, first mounting cavity 18, second mounting cavity 19, connecting bracket 1a, assembly hole 1b, limiting groove 1c. Rotor 21, shaft 22; Impeller 30, first connecting plate 31, second connecting plate 32, blade 33, opening 34, arc-shaped guide ring 35. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Example 1 like Figure 1-8 As shown, this embodiment discloses a water pump, which includes a pump body, a motor, and an impeller 30. In this embodiment, the motor is a bidirectional motor, that is, the motor can rotate in a first direction or a second direction. When the first direction is clockwise, the second direction is counterclockwise; when the first direction is counterclockwise, the second direction is clockwise. The motor is connected to the pump body.

[0034] The pump body includes a pump casing 11, an end cover 12, and an outlet cover 13. The lower end of the pump casing 11 is detachably and sealingly connected to the outlet cover 13, that is, the pump casing 11 and the outlet cover 13 are sealed together and then secured with screws. A pump chamber 14 is formed between the pump casing 11 and the outlet cover 13. The outlet cover 13 is provided with a first outlet 15, a second outlet 16, and an inlet 17, and the first outlet 15, the second outlet 16, and the inlet 17 are all connected to the pump chamber 14.

[0035] The pump casing 11 has a first mounting cavity 18 with an upward opening and a second mounting cavity 19 with a downward opening. The first mounting cavity 18 surrounds the outer periphery of the second mounting cavity 19. The stator of the motor is placed in the first mounting cavity 18, and the end cover 12 is connected to the upper end of the pump casing 11 and seals the first mounting cavity 18. The second mounting cavity 19 is connected to the pump chamber 14, and the rotor 21 of the motor is placed in the second mounting cavity 19. The first mounting cavity 18 and the second mounting cavity 19 are not connected to each other. A connecting frame 1a is provided in the inlet 17. The bottom of both the connecting frame 1a and the second mounting cavity 19 is provided with mounting holes 1b that are adapted to the motor shaft 22. The distance between the two mounting holes 1b is adapted to the length of the shaft 22. One end of the motor shaft 22 is inserted into the mounting hole 1b on the second mounting cavity 19, and the other end of the motor shaft 22 is inserted into the mounting hole 1b on the connecting frame 1a.

[0036] The motor shaft 22 is rotatably engaged with the mounting hole 1b, and the motor rotor 21 is fixedly connected to the shaft 22. Alternatively, the motor shaft 22 can be anti-rotating engaged with the mounting hole 1b. This can be achieved by setting any one or both mounting holes 1b to be non-circular (e.g., D-shaped, polygonal, etc.) and adapting the end shape of the non-circular motor shaft 22 accordingly. In this case, the motor rotor 21 is rotatably connected to the shaft 22.

[0037] The pump body and motor connection structure described above is simple, facilitating assembly and subsequent maintenance. By inserting the motor shaft 22 through the mounting hole 1b, the motor rotor 21 can be effectively stabilized, and the walls of the first mounting cavity 18 and the second mounting cavity 19 are less susceptible to impact. The pump casing 11 is made of non-magnetic material.

[0038] The impeller 30 is built into the pump chamber 14, and the motor drives the impeller 30 to rotate in a first direction or in a second direction. Specifically, the impeller 30 includes a first connecting plate 31, a second connecting plate 32, and a plurality of blades 33. The blades 33 are fixedly connected between the first connecting plate 31 and the second connecting plate 32, which ensures the structural strength of the blades 33. The blades 33 are evenly distributed around the axial circumference of the impeller 30. In particular, the blades 33 are arranged in an arc shape, and the arc-shaped dome of the blades 33 faces the direction of water flow when the motor rotates in the first direction. To ensure the pumping effect, the arc angle of the blades 33 is defined as θ (i.e., the angle between the tangents at the two endpoints of the arc), and the thickness of the blades 33 is d. Then, 0° < θ < 90°, and d ≥ 1mm. In addition, it is required that the spacing between any two adjacent blades 33 increases in the direction away from the rotation center of the impeller 30, that is, the spacing L1 between any two adjacent blades 33 at the end near the opening 34 is less than the spacing L2 between any two adjacent blades 33 at the end near the edge of the first connecting plate 31.

[0039] The rotor 21 of the motor is connected to the second connecting plate 32. The first connecting plate 31 is the part of the impeller 30 near the inlet 17. The first connecting plate 31 has an opening 34 facing the inlet 17. One end of the blade 33 is positioned near the opening 34, and the other end of the blade 33 is aligned with the outer edges of the first connecting plate 31 and the second connecting plate 32 to ensure the strength of the blade tip. An arc-shaped guide ring 35 is also provided on the side of the first connecting plate 31 away from the second connecting plate 32, and this arc-shaped guide ring 35 surrounds the opening 34. A limiting groove 1c adapted to the arc-shaped guide ring 35 is provided on the pump body, and the limiting groove 1c surrounds the inlet 17. The arc-shaped guide ring 35 is inserted into the limiting groove 1c. The setting of the arc-shaped guide ring 35 facilitates the guidance of water flow into the pump chamber 14.

[0040] In this embodiment, the diameter of the first water outlet 15 is preferably not less than 14mm to ensure that the water flow meets the usage requirements when used on a toilet. The orientation of the first water outlet 15 is the direction of water flow when the motor rotates in the first direction. More specifically, the opening of the first water outlet 15 is parallel to the tangent direction of the outer edge of the pump chamber 14 closest to it, or is set at an angle α ≤ 30° with the tangent direction. The orientation of the second water outlet 16 is the direction of water flow when the motor rotates in the second direction. More specifically, the opening of the second water outlet 16 is parallel to the tangent direction of the outer edge of the pump chamber 14 closest to it, or is set at an angle α ≤ 30° with the tangent direction.

[0041] With the above settings, when the motor rotates in the first direction, the first outlet 15 can discharge water at a high flow rate, while the second outlet 16 discharges water at a low flow rate or not at all. When the motor rotates in the second direction, the first outlet 15 discharges water at a low flow rate or not at all, while the second outlet 16 discharges water at a high flow rate. If the low flow rate is considered as no water discharge, then this achieves time-sharing water discharge from the two outlets of the water pump by rotating the motor in both directions. In addition, by setting the blades 33 of the impeller 30 to be arc-shaped with the arc-shaped dome facing the direction of water flow when the motor rotates in the first direction, the water discharge from the first outlet 15 can be smoother and the water discharge power is stronger when the motor rotates in the first direction. The first outlet 15 is particularly suitable as the main outlet of the water pump, and when applied to a toilet, the first outlet 15 is particularly suitable for drainage.

[0042] Example 2 like Figure 9-13 As shown, the difference between this embodiment and Embodiment 1 is that the opening orientation of the second outlet 16 has been adjusted. Specifically, in this embodiment, the opening orientation of the second outlet 16 is set at an angle β with the tangent direction of the outer edge of the corresponding pump chamber 14, where 30° < β ≤ 60°. In this way, water can be discharged from the second outlet 16 when the motor rotates in either the first or second direction.

[0043] Example 3 This embodiment discloses a flushing system, which includes a water storage container, a drain pipe, a washing pipe, and the water pump described in Embodiment 1. The water storage container can be a water tank installed on the toilet or a submerged water chamber, and the water pump is located at the bottom of the water storage container. The first outlet 15 is connected to the inlet of the drain pipe, and the outlet of the drain pipe is connected to the toilet's drain outlet for toilet drainage.

[0044] The second outlet 16 connects to the inlet of the washing pipe, and the outlet of the washing pipe connects to the washing hole of the toilet bowl for washing the walls of the toilet bowl. With this setup, washing and drainage can be performed simultaneously by controlling the forward and reverse rotation of the motor (ignoring small flow rates). To prevent water waste due to a siphon effect in the drainage pipe (and washing pipe) after the water pump stops, at least the drainage pipe is equipped with an anti-siphon port, and the anti-siphon port is set higher than the working water level of the storage container.

[0045] Example 4 The difference between this embodiment and embodiment three is that the water pump described in embodiment two is used to achieve a control mode in which washing is performed first and then drainage, and washing is performed simultaneously.

[0046] Example 5 The difference between this embodiment and embodiments three and four is that the water pump is placed outside the water storage container, and the water storage container has a water outlet located at the bottom or near the bottom of the container, connecting to the inner cavity of the container. The water pump's inlet 17 is connected to the water outlet via a pipe. This arrangement eliminates the need for the water pump to be submerged in water, reducing the waterproofing requirements and allowing for the selection of a water pump with a relatively lower waterproof rating to reduce costs.

[0047] Example 6 This embodiment discloses a toilet that uses the flushing system described in Embodiment 3, Embodiment 4, or Embodiment 5.

[0048] It should be noted that in practical applications, factors such as the pipe path connected to the outlet, the pipe outlet height, the motor speed, the outlet diameter, and the pipe diameter will all affect the final water flow rate. Therefore, by taking these factors into account, it is entirely possible to achieve true time-sharing water output, that is, when washing, only the washing pipe outputs water and the drain pipe does not output water at all, and when draining, only the drain pipe outputs water and the washing pipe does not output water at all.

[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water pump, characterized in that: The pump includes a pump body, a motor, and an impeller. The motor is connected to the pump body and can rotate in a first direction or a second direction. When the first direction is clockwise, the second direction is counterclockwise; when the first direction is counterclockwise, the second direction is clockwise. The pump body is provided with a pump chamber, a first outlet, a second outlet, and an inlet, all of which are connected to the pump chamber. The first outlet is oriented in the direction of water flow when the motor rotates in a first direction, and the opening of the first outlet is parallel to the tangent direction of the outer edge of the pump chamber closest to it, or at an angle α to the tangent direction, wherein the angle α ≤ 30°. The diameter of the first outlet is not less than 14mm. The impeller is built into the pump chamber, and the motor drives the impeller to rotate in a first direction or in a second direction; the impeller includes a plurality of blades, which are evenly distributed around the axial circumference of the impeller, and the blades are arranged in an arc shape, with the arc-shaped dome of the blades facing the direction of water flow when the motor rotates in the first direction.

2. The water pump according to claim 1, characterized in that: The impeller also includes a first connecting plate and a second connecting plate, and the blade is fixedly connected between the first connecting plate and the second connecting plate; the first connecting plate has an opening facing the water inlet, one end of the blade is positioned close to the opening, and the other end of the blade is aligned with the outer edges of the first connecting plate and the second connecting plate; The second connecting plate is fixedly connected to the rotor of the motor.

3. The water pump according to claim 2, characterized in that: The first connecting plate is provided with an arc-shaped guide ring on the side away from the second connecting plate, and the arc-shaped guide ring is arranged around the opening; the pump body is provided with a limiting groove that matches the arc-shaped guide ring, and the limiting groove is arranged around the water inlet, and the arc-shaped guide ring is inserted into the limiting groove.

4. The water pump according to claim 1, characterized in that: The arc angle of the blade is θ, and the thickness of the blade is d. Then 0° < θ < 90°, and d ≥ 1 mm. The spacing between any two adjacent blades increases in the direction away from the impeller rotation center.

5. The water pump according to claim 1, characterized in that: The pump body includes a pump casing, an end cover, and an outlet cover. The lower end of the pump casing is detachably and sealed to the outlet cover, and the pump chamber is formed between the pump casing and the outlet cover. The first outlet, the second outlet, and the inlet are all located on the outlet cover. The pump casing has a first mounting cavity with an upward opening and a second mounting cavity with a downward opening. The first mounting cavity surrounds the outer periphery of the second mounting cavity, and the first mounting cavity and the second mounting cavity are not in communication with each other. The stator of the motor is placed in the first mounting cavity, and the end cover is connected to the upper end of the pump casing and seals the first mounting cavity. The second mounting cavity communicates with the pump chamber, and the rotor of the motor is placed in the second mounting cavity. A connecting frame is provided in the inlet. The bottom of the connecting frame and the second mounting cavity are both provided with assembly holes adapted to the motor shaft, and the end of the motor shaft is inserted into the assembly hole.

6. The water pump according to claim 5, characterized in that: The motor shaft is rotatably fitted with the mounting hole, and the motor rotor is fixedly connected to the shaft; or, the motor shaft is anti-rotating fitted with the mounting hole, and the motor rotor is rotatably connected to the shaft.

7. The water pump according to claim 1, characterized in that: The opening of the second outlet is parallel to the tangent direction of the outer edge of the pump chamber closest to it, or is set at an angle α with the tangent direction, wherein the angle α ≤ 30°, and the orientation of the second outlet is the direction of water flow when the motor rotates in the second direction; or, the opening of the second outlet is set at an angle β with the tangent direction of the corresponding outer edge of the pump chamber, wherein 30° < β ≤ 60°.

8. A flushing system, characterized in that: The device includes a water storage container, a drainage pipe, a washing pipe, and a water pump as described in any one of claims 1-7. The water pump is disposed at the bottom of the inner cavity of the water storage container, or the water pump is disposed outside the water storage container, and the water inlet of the water pump is connected to the bottom of the inner cavity of the water storage container; the first water outlet is connected to the drainage pipe, and the second water outlet is connected to the washing pipe.

9. The flushing system according to claim 8, characterized in that: In the drainage pipe and the washing pipe, at least the drainage pipe is provided with an anti-siphon port, and the anti-siphon port is set higher than the working water level of the water storage container.

10. A toilet, characterized in that: The flushing system described in claim 8 or 9 is used.

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