Water pump, control circuit thereof, integrated water piece and closestool

Abstract

The utility model relates to a water pump, its control circuit, integrated water piece and closestool, the water pump includes pump body, motor and impeller, be equipped with the pump cavity, at least one water inlet and at least one water outlet in the pump body, water inlet and water outlet both communicate with the pump cavity, the impeller is built in the pump cavity, the motor drives the impeller to rotate. The at least one water outlet comprises a main opening and an auxiliary opening, the two ends of the main opening and the two ends of the auxiliary opening are communicated respectively, the main opening is communicated with the pump cavity, the auxiliary opening is communicated with the main opening, and the position, communicated with the main opening, of the auxiliary opening is located on the side, close to the connecting end of the pump cavity, of the main opening. The opening direction of the auxiliary opening is perpendicular to or inclined to the opening direction of the corresponding main opening. Flow control of different water outlets can be achieved by controlling forward and reverse rotation of the motor, control is convenient, and the structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, and in particular to a water pump, its control circuit, and an integrated water fitting and toilet using the water pump. Background Technology

[0002] A water pump typically consists of a pump body, a motor, and an impeller. The pump body has a pump chamber, an inlet, and an outlet, both of which are connected to the pump chamber. The impeller is housed within the pump chamber, and the motor drives the impeller to rotate, thus pumping water. In conventional water pumps, the motor usually rotates in only one direction. As the applications of water pumps have increased, various pump styles have emerged to meet different usage needs, such as pumps with multiple outlets. Currently, water pumps with multiple outlets generally discharge water from all outlets simultaneously. To achieve timed water discharge from different outlets, a switching mechanism is often required within the pump chamber for control. This approach undoubtedly increases equipment costs and also increases potential points of failure. Utility Model Content

[0003] One objective of this utility model is to provide a water pump and its control circuit, which can achieve flow control of different water outlets by controlling the forward and reverse rotation of the motor, which is convenient to control and has a simple structure. Another objective of this utility model is to provide an integrated water component and toilet, which can achieve different mode control by dispensing water through different water outlets, and can be applied to smart toilets.

[0004] To achieve the above objectives, this utility model discloses a water pump, including a pump body, a motor, and an impeller. The pump body has a pump chamber, at least one inlet, and at least one outlet, both of which are connected to the pump chamber. The impeller is built into the pump chamber, and the motor drives the impeller to rotate. The outlet includes a main outlet and a secondary outlet, both ends of which are open. The main outlet is connected to the pump chamber, and the secondary outlet is connected to the main outlet. The connection point between the secondary outlet and the main outlet is located on the side of the main outlet closest to the connection end of the pump chamber. The opening orientation of the secondary outlet is perpendicular or inclined to the opening orientation of the corresponding main outlet.

[0005] With the above configuration, taking a single outlet as an example, when the motor rotates forward, the main outlet can pump water (high flow rate), while the auxiliary outlet pumps water at a low flow rate or not at all. When the motor rotates in reverse, the main outlet may not pump water or may pump water at a low flow rate, while the auxiliary outlet can pump water. Whether the auxiliary outlet pumps water is determined by its diameter. For example, if the auxiliary outlet's diameter is designed to be relatively small, it can not pump water when the motor rotates forward, but both the main and auxiliary outlets pump water at a low flow rate when the motor rotates in reverse. If the auxiliary outlet's diameter is designed to be relatively large, it will pump water at a low flow rate when the motor rotates forward, but will pump water at a higher flow rate when the motor rotates in reverse, while the main outlet will not pump water. This invention allows for time-separated water output from the main and auxiliary outlets of the pump, enabling flow control at different outlets. The control is convenient, and the on / off function of the main outlet does not require an additional on / off structure, resulting in a simpler structure and lower manufacturing and maintenance costs for the pump.

[0006] Furthermore, the water outlet includes at least one first water outlet and at least one second water outlet; the first water outlet includes a main outlet and a secondary outlet, and the second water outlet includes a main outlet and a secondary outlet, or the second water outlet includes only the main outlet. The orientation of the main outlet corresponding to the first water outlet is the water flow direction when the motor rotates in a first direction, and the orientation of the main outlet corresponding to the second water outlet is the water flow direction when the motor rotates in a second direction, wherein the first direction and the second direction are opposite.

[0007] The opening of the main port is oriented parallel to the tangent direction of the outer edge of the pump cavity, or at an angle α to the tangent direction, wherein the angle α ≤ 30°.

[0008] By dividing the water outlet into a first outlet and a second outlet, when the motor rotates in a first direction (e.g., clockwise), water mainly flows from the main outlet corresponding to the first outlet, while no water flows from the main outlet corresponding to the second outlet, and all the auxiliary outlets flow out in small amounts. When the motor rotates in a second direction (e.g., counterclockwise), water mainly flows from the main outlet corresponding to the second outlet, while no water flows from the main outlet corresponding to the first outlet, and all the auxiliary outlets flow out in small amounts. This allows for alternating or staggered water flow between the main outlets of the first and second outlets. When the water pump is placed in a water tank, all auxiliary outlets can be connected to the tank, ensuring no water loss and minimal impact on the water output of the main outlet.

[0009] Preferably, the cross-sectional area of ​​the main outlet is not less than that of the secondary outlet. This arrangement ensures that when water flows out of the main outlet, the corresponding secondary outlet also flows out at a small flow rate, reducing the impact of the secondary outlet's water flow on the main outlet's water flow and ensuring the water pressure or flow rate at the main outlet.

[0010] Preferably, the depth of the pump chamber is not less than the diameter of the main inlet. This configuration ensures the water pressure or flow rate at the main inlet.

[0011] The opening orientation of the secondary port is set at an angle b to the opening orientation of the corresponding main port, wherein the angle is 30°≤b≤150°.

[0012] Preferably, the centerline of the secondary port passes through the center of the cross-section of the pump cavity.

[0013] Preferably, at least one guide is provided on the inner wall of the pump chamber, and the guide is provided corresponding to at least one of the water outlets.

[0014] Furthermore, the guide is disposed on the rear side of the outlet in the direction of rotation. The front end face of the guide is set at an angle to the corresponding outlet. The outer surface of the guide is an arc-shaped guide surface. The thickness of the front end face of the arc-shaped guide is greater than the thickness of the rear end face.

[0015] Preferably, the pump body includes an outlet cover and a pump housing, which are detachably and sealingly connected, and the outlet cover and pump housing cooperate to form a pump cavity; the inlet is located at one end of the outlet cover, and the outlet is located on the side wall of the outlet cover; the motor is detachably connected inside the pump housing, or the pump housing and motor are integrally formed. This configuration facilitates the installation of the water pump, and the concentration of the inlet and outlet on the outlet cover facilitates mold making.

[0016] Preferably, a connecting frame is provided inside the water inlet of the water outlet cover, and the end of the connecting frame has an assembly hole. The motor is fixedly connected to the impeller, and the motor shaft passes through the rotor and is connected to the assembly hole of the connecting frame.

[0017] The impeller includes a first connecting plate, a second connecting plate, and a plurality of blades evenly disposed between the first connecting plate and the second connecting plate. The first connecting plate has an opening in the middle, the diameter of which is larger than the diameter of the water inlet, and the end of the opening is provided with an arc-shaped guide surface for guiding the water flow.

[0018] This utility model also discloses the control circuit of the aforementioned water pump, including: an AC / DC unit, an MCU module, and a DC / AC unit, a signal detection module, and a drive circuit connected to the MCU module; the input terminal of the AC / DC unit is connected to a power supply, and the output terminal of the AC / DC unit is connected to a motor via the DC / AC unit; the signal detection module is used to detect start signals and direction control signals, and transmit them to the MCU module; the drive circuit receives signals from the MCU module, amplifies the signals, and transmits them to the DC / AC unit; the DC / AC unit is used to control the motor to rotate in the forward or reverse direction.

[0019] Furthermore, it also includes a back EMF detection circuit, which is used to collect the back EMF in the water pump and transmit it to the MCU module.

[0020] This utility model also discloses an integrated water fitting, including a housing, a drainage mechanism, a drainage base, and the aforementioned water pump. The water pump and drainage mechanism are installed in the inner cavity of the housing, and the drainage base is installed below the housing. The housing is provided with a water inlet and outlet hole for water supply. At least one of the outlets is connected to the drainage mechanism.

[0021] In some embodiments, there are two water outlets: a first water outlet and a second water outlet. The main opening of the first water outlet is a drain outlet, which is connected to a drainage mechanism. The main opening of the second water outlet is a washing outlet, which is connected to a washing pipe outside the housing.

[0022] In some embodiments, an auxiliary flushing pipe is also included; the water outlet is provided with three outlets, including two first outlets and one second outlet, the main openings of the two first outlets being a drain outlet and an auxiliary flushing outlet, respectively, the drain outlet being connected to a drainage mechanism, the auxiliary flushing outlet being connected to one end of the auxiliary flushing pipe, and the other end of the auxiliary flushing pipe being connected to the drain outlet of the drainage base; the main opening of the second outlet is a washing outlet, and the washing outlet is connected to a washing pipe outside the housing.

[0023] In other embodiments, a flushing aid pipe and a flow distribution assembly are also included. The flow distribution assembly has a through-flow inlet and at least two flow branch outlets. Two outlets are provided: a first outlet and a second outlet. The main port of the first outlet is connected to the flow inlet. The two flow branch outlets are a drain outlet and a flushing aid outlet. The drain outlet is connected to a drainage mechanism, and the flushing aid outlet is connected to one end of the flushing aid pipe. The other end of the flushing aid pipe is connected to the drain outlet of the drainage base. The main port of the second outlet is a washing outlet, which is connected to a washing pipe outside the housing.

[0024] Preferably, when rotating in the first direction, the head of the drain outlet is greater than 3m; when rotating in the second direction, the flow rate of the scrubbing inlet is greater than 12L / min, and the head of the drain outlet is less than 2m.

[0025] Preferably, the flushing aid pipe includes an inverted U-shaped pipe and a flushing aid pipe connected in sequence. One end of the inverted U-shaped pipe is connected to the flushing aid port, and the other end is connected to the flushing aid pipe. The top of the inverted U-shaped pipe is provided with an air hole, and the air hole is higher than the set working water level in the water chamber. The flushing aid pipe is connected to the drainage base, or the flushing aid pipe and the drainage base are integrally formed, and the end of the flushing aid pipe bends out from the drainage outlet of the drainage base. The flushing aid pipe is a Venturi tube, and the diameter of the Venturi tube gradually decreases.

[0026] This utility model also discloses a toilet, including the above-mentioned water pump, or the above-mentioned water pump control circuit, or the above-mentioned integrated water fitting.

[0027] This invention allows for timed water output from different outlets via forward and reverse motor rotation, offering convenient control. The main outlet requires no additional on / off structure, simplifying the design and reducing pump manufacturing and maintenance costs. This integrated water fitting and toilet, utilizing its pump, enables timed water output for drainage (or drainage and flushing) and washing modes. It boasts high integration, a compact structure, and is suitable for toilets with recessed water chambers or small tanks. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of Example 1.

[0029] Figure 2 This is a schematic diagram from another perspective of Embodiment 1.

[0030] Figure 3 This is a cross-sectional view of the pump body in Example 1.

[0031] Figure 4 This is an exploded view of the water pump in Example 1.

[0032] Figure 5 This is a partial cross-sectional view of the water pump in Example 1.

[0033] Figure 6 This is a schematic diagram showing the connection between the impeller and the motor rotor.

[0034] Figure 7 This is a schematic diagram of the water outlet cover in Example 1.

[0035] Figure 8 This is a cross-sectional view of the water outlet cover in Embodiment 1 (a diagram showing the water flow direction when the motor rotates clockwise).

[0036] Figure 9 This is a cross-sectional view of the water outlet cover in Embodiment 1 (a diagram showing the water flow direction when the motor rotates counterclockwise).

[0037] Figure 10 This is a schematic diagram of Example 2.

[0038] Figure 11 This is a schematic diagram of the water outlet cover in Example 2.

[0039] Figure 12 This is a cross-sectional view of the water outlet cover in Embodiment 2.

[0040] Figure 13 This is a cross-sectional view of the water outlet cover in Embodiment 3.

[0041] Figure 14 This is a schematic diagram of the water outlet cover in Example 4.

[0042] Figure 15 This is a schematic diagram of the water outlet cover in Example 5.

[0043] Figure 16 This is a schematic diagram of the water outlet cover in Example 6.

[0044] Figure 17 This is a cross-sectional view of the water outlet cover in Example 6 (a diagram showing the water flow direction when the motor rotates clockwise).

[0045] Figure 18 This is a cross-sectional view of the water outlet cover in Example 6 (a diagram showing the water flow direction when the motor rotates counterclockwise).

[0046] Figure 19 This is a schematic diagram of the control circuit of Embodiment Seven of this utility model.

[0047] Figure 20 This is a schematic diagram of a DC / AC unit.

[0048] Figure 21 This is a schematic diagram of the integrated water fitting in Example 8.

[0049] Figure 22 This is a schematic diagram of the integrated water fitting in Example 8 (with the housing portion hidden).

[0050] Figure 23 This is a schematic diagram of the integrated water fitting in Example 9 (simple flow distribution component, with a hidden portion of the housing).

[0051] Figure 24 This is a schematic diagram of the integrated water fitting in Example 9 (a flow distribution component with a delay function, with a hidden portion of the housing).

[0052] Explanation of symbols for main components:

[0053] Water outlet cover 11, connecting bracket 111, mounting hole 112, pump housing 12, pump chamber 13, water inlet 14, first water outlet 15, drain outlet 15a, flushing outlet 15b, second water outlet 16, washing outlet 16a, main outlet 17, auxiliary outlet 18, reference tangent 19, first guide member 1a.

[0054] Power supply 21, AC / DC unit 22, DC / AC unit 23, drive control unit 24, back EMF detection circuit 25, motor 26, rotor 261, motor shaft 262.

[0055] Impeller 3, first connecting plate 31, opening 311, arc-shaped guide surface 312, second connecting plate 32, blade 33;

[0056] Guide component 4, housing 5, water inlet 51, drainage mechanism 6, drainage base 7, flushing pipe 8, inverted U-shaped pipe 81, flushing pipe 82, air hole 83, flow distribution component 9, flow inlet 91, flow outlet 92, and scrubbing pipe 10. Detailed Implementation

[0057] 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.

[0058] Example 1

[0059] like Figures 1-9 As shown, this embodiment discloses a water pump, which includes a pump body, a motor 26, and an impeller. The pump body includes an outlet cover 11 and a pump housing 12, which are detachably and sealingly connected, such as by snap-fit ​​or screw connection. The outlet cover 11 and the pump housing 12 cooperate to form a pump cavity 13, and the impeller is placed in the pump cavity 13. The size of the impeller is adapted to the pump cavity 13, and preferably the cross-sectional shape of the pump cavity 13 is circular. The motor 26 is used to drive the impeller 3 to rotate. The motor 26 is detachably connected to the pump housing 12, or the pump housing 12 and the outer shell of the motor 26 are integrally formed, which can be adapted according to the selection of the motor 26.

[0060] The end of the water outlet cover 11 is provided with a water inlet 14, and the side wall of the water outlet cover is provided with at least one water outlet. Both the water inlet 14 and the water outlet are connected to the pump chamber 13. In this embodiment, the water inlet 14 is located on the side end face directly opposite the impeller.

[0061] Combination Figure 7 As shown, a connecting bracket 111 is provided inside the water inlet 14 of the water outlet cover 11, and the end of the connecting bracket 111 has an assembly hole 112. Combined with... Figure 4-6 As shown, the rotor 261 of the motor is fixedly connected to the impeller 3, and the stator of the motor is fixed inside the pump casing 12 or integrally formed therewith. The motor shaft 262 passes through the rotor 261 and is connected to the assembly hole 112 of the connecting frame 111. The impeller 3 includes a first connecting plate 31, a second connecting plate 32, and a plurality of blades 33 evenly arranged between the first connecting plate 31 and the second connecting plate 32. The first connecting plate 31 has an opening 311 in the middle, the diameter of which is larger than the diameter of the inlet 14, and the end of the opening has an arc-shaped guide surface 312 for guiding the water flow.

[0062] At least one outlet includes a main outlet 17 and a secondary outlet 18, both of which are interconnected. The main outlet 17 of each outlet is connected to the pump chamber 13, and the secondary outlet 18 is connected to the main outlet. The connection point between the secondary outlet 18 and the main outlet 17 is located on the side of the main outlet 17 closest to the connection end of the pump chamber 13. Figure 8As shown, a reference tangent 19 is drawn along the edge of the cross-section of the pump chamber 13 (which has a circular cross-section). The direction of the reference tangent 19 is the tangent direction. Therefore, the opening orientation of the main port 17 (i.e., the direction of the center line of the main port) should be parallel to the tangent direction (a=0°), or at a small angle α with the tangent direction, where α≤30°. The opening orientation of the secondary port 18 corresponding to the main port 17 (i.e., the direction of the center line of the secondary port) is perpendicular to or inclined to the opening orientation of the corresponding main port. The inclination angle is b, where 30°≤b≤150°. Preferably, the center line of the secondary port passes through the center of the cross-section of the pump chamber. This arrangement ensures that when rotating along the tangent direction, water flows from the main port 17 and a small flow from its corresponding secondary port 18; when rotating against the tangent direction, all water flows from the secondary port 18, and no water flows from the main port 17. To ensure the water pressure or flow rate at the main outlet 17, the cross-sectional area of ​​the main outlet 17 must be larger than that of the secondary outlet 18, and the depth H of the pump chamber 13 must not be less than the diameter of the main outlet 17. This configuration ensures the water pressure or flow rate at the main outlet 17.

[0063] The water outlet includes at least one first water outlet and at least one second water outlet. The orientation of the main inlet 17 corresponding to the first water outlet 15 is the direction of water flow when the impeller rotates in a first direction, and the orientation of the main inlet 17 corresponding to the second water outlet 16 is the direction of water flow when the impeller rotates in a second direction. The first direction and the second direction are opposite. The first direction can be clockwise (motor forward) and the second direction can be counterclockwise (motor reverse), or the first direction can be counterclockwise and the second direction can be clockwise.

[0064] like Figure 8 As shown, there are two water outlets: a first outlet and a second outlet. Both the first and second outlets have a main outlet and a secondary outlet. When the motor 26 rotates clockwise, water mainly flows out from the main outlet 17 corresponding to the first outlet 15 (high flow rate), while no water flows out from the main outlet 17 corresponding to the second outlet 16 (or a low flow rate). No water flows out from the secondary outlet 18 corresponding to the first outlet 15, or only a low flow rate, while a low flow rate flows from the secondary outlet 18 corresponding to the second outlet 16.

[0065] like Figure 9As shown, when motor 26 rotates counterclockwise, water mainly flows from the main outlet 17 corresponding to the second outlet 16 (high flow rate), while the main outlet 17 corresponding to the first outlet 15 does not flow (or flows at a low flow rate). The auxiliary outlet 18 corresponding to the first outlet 15 flows at a low flow rate, while the auxiliary outlet 18 corresponding to the second outlet 16 either does not flow or flows at a low flow rate. Thus, by controlling the forward and reverse rotation of motor 26, water can be distributed at different times (staggered flow) between the main outlet 17 of the first outlet 15 and the main outlet 17 of the second outlet 16. When the water pump is placed in the water tank, all auxiliary outlets 18 can be connected to the water tank, so that the water volume in the tank is not lost and the impact on the flow rate of the main outlet 17 is minimal. Of course, the auxiliary outlets 18 can also be connected to other locations for continuous low-flow water supply.

[0066] Example 2

[0067] like Figures 10-12 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, three water outlets are provided, including two first water outlets 15 and one second water outlet 16. The main outlet of the first water outlet 15 is oriented in the direction of water flow when the motor 26 rotates in a first direction (clockwise in the figure), and the main outlet of the second water outlet 16 is oriented in the direction of water flow when the motor 26 rotates in a second direction (counterclockwise in the figure). Both the first water outlet 15 and the second water outlet 16 are provided with a main outlet and a secondary outlet.

[0068] Two first water outlets 15 are provided. With this configuration, when the impeller rotates in the first direction, the main ports 17 of the two first water outlets 15 can discharge water simultaneously, and when the impeller rotates in the second direction, the main ports 17 of the two first water outlets 15 can stop discharging water simultaneously. As for other expansions, more first water outlets 15 or more second water outlets 16 can be provided to adapt to different water supply application scenarios, which will not be elaborated further.

[0069] Example 3

[0070] like Figure 13As shown, the difference between this embodiment and Embodiment 1 is that it only has one outlet. This outlet includes a main outlet and a secondary outlet. With this configuration, when the motor 26 rotates counterclockwise as shown in the figure, the main outlet 17 can pump water (high flow rate), while the secondary outlet 18 can pump water at a low flow rate (or not at all). When the motor stops or reverses, the main outlet 17 can not pump water. In addition, when the motor reverses, the secondary outlet 18 can still pump water at a low flow rate, thereby realizing flow control of different outlets of the water pump. The water pump in this embodiment can be used for low flow rate water supply under normal conditions (i.e., water supply through the secondary outlet 18), and for high flow rate water supply when needed (i.e., water supply through both the main outlet 17 and the secondary outlet 18). Of course, the water pump can also have multiple first outlets 15 or second outlets 16 to provide synchronous water supply for different water use situations.

[0071] Example 4

[0072] like Figure 14 As shown, the difference between this embodiment and Embodiment 1 is that: the water outlet includes multiple outlets (two in the figure), and the orientation of their corresponding main outlets is the water flow direction when the motor rotates in the same direction (clockwise in the figure).

[0073] In this situation, when the motor 26 rotates clockwise, water flows out from both the main outlet and the auxiliary outlet simultaneously. However, when the motor 26 rotates counterclockwise, water does not flow from either of the main outlets, and only a small amount of water flows out from the auxiliary outlet.

[0074] Example 5

[0075] like Figure 15 As shown, the difference between this embodiment and Embodiment 1 is that there are two water outlets: a first water outlet 15 and a second water outlet 16. The first water outlet 15 has a main outlet and a secondary outlet, while the second water outlet 16 only has a main outlet.

[0076] When motor 26 rotates clockwise, water flows from both the main outlet 17 (corresponding to the first outlet 15) and the second outlet 16. The auxiliary outlet 18 (corresponding to the first outlet 15) does not flow or flows at a low flow rate. When the water pump is placed in a water tank, the auxiliary outlet 18 can be connected to the water tank, thus preventing water loss and minimizing the impact on the flow rate of the main outlet 17. Alternatively, the auxiliary outlet 18 can be connected to another location via a pipe for continuous low-flow water supply.

[0077] When motor 26 rotates counterclockwise, water mainly flows out from the second outlet 16 (high flow rate), while the main outlet 17 corresponding to the first outlet 15 does not flow out (or flows out at a low flow rate). The auxiliary outlet 18 corresponding to the first outlet 15 flows out at a low flow rate.

[0078] By controlling the forward and reverse rotation of motor 26, two water output modes can be achieved. When the main outlet of the first water outlet is connected to the toilet drain outlet and the second water outlet is connected to the toilet wash outlet, the following can be achieved: in wash mode, water flows only from the second water outlet for washing, while in drain mode, water flows from both the drain outlet and the wash outlet for overall flushing.

[0079] Example 6

[0080] like Figure 16-18 As shown, the difference between this embodiment and any of the above embodiments is that a guide 4 is also provided on the inner wall of the pump chamber 13, and the guide 4 is correspondingly provided with at least one water outlet.

[0081] The guide member 4 is located on the rear side of the corresponding outlet in the direction of rotation, and the front end face of the guide member 4 is set at an angle C with the corresponding outlet. The outer surface of the guide member 4 is an arc-shaped guide surface 41, and the thickness of the front end face of the arc-shaped guide surface 41 is greater than the thickness of the rear end face.

[0082] The guide member 4 is provided to increase the head of the corresponding outlet. As shown in the figure, in order to increase the head of the first outlet 15, the guide member 4 is provided on the rear side of the first outlet 15. Figure 16 The arrows shown indicate the rotation direction corresponding to the first outlet 15. By setting the guide 4, the water flow can be guided to flow out along the main outlet of the corresponding outlet, thus increasing the head.

[0083] Example 7

[0084] like Figure 19 As shown, this utility model also discloses a control circuit for a water pump, including: an AC / DC unit, an MCU module, and a DC / AC unit, a signal detection module, a drive circuit, and a back EMF detection circuit connected to the MCU module.

[0085] The input of the AC / DC unit is connected to the power supply, and the output of the AC / DC unit is connected to the motor via the DC / AC unit. The input of the back EMF detection circuit is connected to the output of the DC / AC unit, and the drive circuit is connected to the DC / AC unit. The signal detection module detects the start signal and steering control signal and transmits them to the MCU module. The back EMF detection circuit collects the back EMF from the water pump and transmits it to the MCU module. After receiving the start signal and steering control signal, the MCU module sends a control signal to the drive circuit. The drive circuit receives the control signal from the MCU module, amplifies it, and transmits it to the DC / AC unit (MOS transistor control terminal). The DC / AC unit changes the operating logic of the MOS transistor, thereby controlling the motor to rotate in the forward or reverse direction.

[0086] The input terminal of AC / DC unit 22 is connected to power supply 21 to rectify single-phase AC power into DC power. The output terminal of AC / DC unit 22 is connected to motor 26 via DC / AC unit 23. DC / AC unit 23 inverts the DC power into three-phase power to supply power to motor 26. The input terminal of back EMF detection circuit 25 is connected to the output terminal of DC / AC unit 23. Drive control unit 24 is connected to the control terminal of DC / AC unit 23 and the output terminal of back EMF detection circuit 25. Drive control unit 24 receives external control signals and controls the output of DC / AC unit 23. External control signals include start signals, direction control signals, etc. The back EMF detection circuit is used to detect whether the speed of motor 26 is 0 to ensure that motor 26 can reliably stop.

[0087] like Figure 20 As shown, the DC / AC unit 23 includes a first MOSFET M1, a second MOSFET M2, a third MOSFET M3, a fourth MOSFET M4, a fifth MOSFET M5, a sixth MOSFET M6, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, an output port U, an output port V, and an output port W. The drive control unit 24 has a first control terminal HU, a second control terminal HV, a third control terminal HW, a fourth control terminal LU, a fifth control terminal LV, and a sixth control terminal LW. The drains of the first MOSFET M1, the second MOSFET M2, and the third MOSFET M3 are all connected to the positive terminal of the AC / DC unit 22. The gate of the first MOSFET M1 is connected to the first control terminal HU and one end of the first resistor R1. The source of the first MOSFET M1 is connected to the other end of the first resistor R1, the output port U, and the drain of the fourth MOSFET M4. The gate of MOSFET M2 is connected to the second control terminal HV and one end of the second resistor R2. The source of MOSFET M2 is connected to the other end of the second resistor R2, the output port V, and the drain of the fifth MOSFET M5. The gate of the third MOSFET M3 is connected to the third control terminal HW and one end of the third resistor R3. The source of the third MOSFET M3 is connected to the other end of the third resistor R3, the output port W, and the drain of the sixth MOSFET M6. The gate of the fourth MOSFET M4 is connected to the fourth control terminal LU and one end of the fourth resistor R4. The gate of the fifth MOSFET M5 is connected to the fifth control terminal LV and one end of the fifth resistor R5. The gate of the sixth MOSFET M6 is connected to the sixth control terminal LW and one end of the sixth resistor R6. The other ends of the fourth resistor R4, the fifth resistor R5, and the sixth resistor R6, the source of the fourth MOSFET M4, the source of the fifth MOSFET M5, and the source of the sixth MOSFET M6 are grounded.

[0088] When HU, HV, and HW are simultaneously input at low levels, and M1, M2, and M3 are simultaneously in the off state, then LU, LV, and LW simultaneously input PWM signals with fixed frequency and varying duty cycles, thus achieving soft braking of motor 26. The PWM signal model is: D = D0 + n*Ts*D_step, where: D0 is the initial duty cycle, D_step is the duty cycle increment step, n is the cycle time of the digital controller MCU, and Ts is the period of the digital controller MCU, which is the main component in the drive control unit 24. If M4, M5, and M6 are kept simultaneously on for an extended period, hard braking of motor 26 can be achieved. Hard braking allows motor 26 to stop faster, but the bus voltage V_BUS is prone to becoming too high. While soft braking slows motor 26 down compared to hard braking, it avoids this issue. The choice between soft and hard braking depends on the actual application scenario of the water pump.

[0089] In addition, the forward and reverse rotation control of motor 26 can be achieved by controlling the operation logic of the MOS transistor in the DC / AC unit to swap the phase sequence of two phases of the output three-phase UVW voltage signal. For example, when motor 26 rotates forward, the V phase current lags behind the U phase current by 130°, and the W phase current lags behind the V phase current by 130° (also the W phase current lags behind the U phase current by 240°). When motor 26 needs to rotate in reverse, the W phase current lags behind the U phase current by 130°, and the V phase current lags behind the W phase current by 130° (also the V phase current lags behind the U phase current by 240°).

[0090] Example 8

[0091] like Figures 21-22 As shown, this embodiment discloses an integrated water fitting, including a housing 5, a drainage mechanism 6, a drainage base 7, a flushing pipe 8, and a water pump as described in Embodiment 2. The water pump and drainage mechanism 6 are installed in the inner cavity of the housing 5, the drainage base 7 is installed below the housing 5, and the housing 5 is provided with a water inlet / outlet hole 51.

[0092] The water pump has three outlets, including two first outlets 15 and one second outlet 16. The two first outlets 15 correspond to a drain outlet 15a and a flushing aid outlet 15b, respectively. The drain outlet 15a is connected to the drainage mechanism 6, and the flushing aid outlet 15b is connected to the flushing aid pipe 8. The other end of the flushing aid pipe is connected to the drain outlet of the drainage base 7. The second outlet 16 corresponds to a wash outlet 16a, which connects to the wash pipe 10 outside the housing 5.

[0093] The flushing aid pipe 8 includes an inverted U-shaped pipe 81 and a flushing aid pipe 82 connected in sequence. One end of the inverted U-shaped pipe 81 is connected to the flushing aid port 15b, and the other end is connected to the flushing aid pipe 82. The top of the inverted U-shaped pipe 81 is provided with an air hole 83, and the air hole is higher than the set working water level in the water chamber to achieve the anti-siphon function.

[0094] The flushing aid pipe 82 is connected to the drain base 7, or the flushing aid pipe 82 is integrally formed with the drain base 7. The end of the flushing aid pipe 82 bends and extends from the drain outlet of the drain base 7, and extends into the end of the toilet's drain pipe during use to assist flushing. The flushing aid pipe 82 is a Venturi tube, with the diameter of the Venturi tube gradually decreasing. This design improves the flushing effect.

[0095] In this embodiment, the motor is controlled by forward and reverse rotation. When the motor rotates forward, water mainly flows out from the drain outlet 15a and the flushing aid outlet 15b. That is, the drain mechanism 6 controls the drain base 7 to flush, and the flushing aid pipe 8 provides additional flushing assistance. The head of the drain outlet is greater than 3m. When the motor rotates in reverse, water mainly flows out from the wash outlet 16a through the wash pipe 10. The flow rate of the wash outlet is greater than 12L / min, and the head of the drain outlet is less than 2m. Of course, other water discharge methods can be achieved depending on the structural design of different water pumps.

[0096] In this embodiment, the integrated water fitting is used in a smart toilet, which can realize water output in different modes at different times. It has a simple structure and is easy to control.

[0097] Example 9

[0098] like Figure 23-24 As shown, this embodiment discloses an integrated water fitting, including a housing 5, a drainage mechanism 6, a drainage base 7, a flushing aid pipe 8, a flow distribution component 9, and the water pump from Embodiment 1. The water pump and drainage mechanism 6 are installed in the inner cavity of the housing 5, the drainage base 7 is installed below the housing 5, and the housing 5 is provided with a water inlet / outlet hole 51 for water supply.

[0099] The water pump has two outlets, a first outlet 15 and a second outlet 16. The flow distribution assembly 9 has a through-flow inlet 91 and at least two flow distribution outlets 92. The flow distribution assembly 9 can also adopt the following... Figure 23 The simplified traffic distribution component shown. Or as... Figure 24 As shown, the flow distribution component 9 can adopt the dual-head flow distribution component with the publication number CN215330296U. This type of flow distribution component can be equipped with a delay mechanism, so that the water flows out from one of the flow distribution ports first, and then flows out from the other flow distribution port after a certain time, thus achieving the effect of sequential flow.

[0100] The flow inlet 91 of the flow distribution component is connected to the main port of the first outlet. The two flow distribution ports are the drain port 15a and the flushing port 15b, respectively. The drain port 15a is connected to the draining mechanism, and the flushing port 15b is connected to the flushing pipe. The main port of the second outlet 16 is the washing port 16a, and the washing port 16a is connected to the washing pipe 10.

[0101] This embodiment controls the forward and reverse rotation of the motor. When the motor rotates forward, water flows out of the drain outlet 15a and the flushing outlet 15b. Specifically, the drain mechanism 6 controls the drain base 7 to flush while the flushing pipe 8 provides additional flushing assistance, or the drain base 7 flushes first and then the flushing pipe 8 provides additional flushing assistance (using a flow distribution component with a delay mechanism). This controls the drain outlet head to be greater than 3m and the flushing outlet flow rate to be less than 4L / min. When the motor rotates in reverse, water flows out of the flushing outlet 16a through the flushing pipe 10, controlling the flushing outlet flow rate to be greater than 12L / min and the drain outlet head to be less than 2m. Of course, depending on the structural design of different water pumps, other water discharge methods can also be achieved.

[0102] In this embodiment, the integrated water fitting is used in a smart toilet, which can realize water output in different modes at different times. It has a simple structure and is easy to control.

[0103] Example 10

[0104] This embodiment discloses a toilet, which can be a smart toilet with a recessed water chamber or a small water tank toilet, including the water pump or integrated water fittings of the above embodiment. The water pump or integrated water fittings are disposed inside the water chamber or water tank.

[0105] 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, comprising a pump body, a motor, and an impeller, wherein the pump body has a pump chamber, at least one inlet, and at least one outlet, both the inlet and outlet communicating with the pump chamber, and the impeller is housed within the pump chamber, and the motor drives the impeller to rotate; characterized in that: The at least one outlet includes a main outlet and a secondary outlet, both ends of the main outlet and the secondary outlet are connected. The main outlet is connected to the pump chamber, the secondary outlet is connected to the main outlet, and the connection position of the secondary outlet and the main outlet is located on the side of the main outlet near the connection end of the pump chamber. The opening orientation of the secondary port is set perpendicularly or at an angle to the opening orientation of the corresponding main port.

2. The water pump as described in claim 1, characterized in that: The water outlet includes at least one first water outlet and at least one second water outlet; the first water outlet includes a main outlet and a secondary outlet, the second water outlet includes a main outlet and a secondary outlet, or the second water outlet includes only a main outlet; The orientation of the main inlet corresponding to the first outlet is the direction of water flow when the motor rotates in the first direction, and the orientation of the main inlet corresponding to the second outlet is the direction of water flow when the motor rotates in the second direction. The first direction and the second direction are opposite.

3. The water pump as described in claim 1, characterized in that: The opening of the main port is oriented parallel to the tangent direction of the outer edge of the pump cavity, or at an angle α to the tangent direction, wherein the angle α ≤ 30°.

4. The water pump as described in claim 1, characterized in that: The cross-sectional area of ​​the main port is larger than that of the secondary port, the depth of the pump chamber is greater than the diameter of the main port, and the opening orientation of the secondary port is set at an angle b to the opening orientation of the corresponding main port, wherein the angle is 30°≤b≤150°.

5. The water pump as described in claim 4, characterized in that: The centerline of the secondary port passes through the center of the cross-section of the pump cavity.

6. The water pump according to any one of claims 1 to 5, characterized in that: At least one guide is provided on the inner wall of the pump chamber, and the guide is provided corresponding to at least one of the water outlets.

7. The water pump as described in claim 6, characterized in that: The guide is located on the rear side of the outlet in the direction of rotation. The front end face of the guide is set at an angle to the corresponding outlet. The outer surface of the guide is an arc-shaped guide surface. The thickness of the front end face of the arc-shaped guide is greater than the thickness of the rear end face.

8. The water pump according to any one of claims 1 to 5, characterized in that: The pump body includes an outlet cover and a pump housing, which are detachably and sealed together, and the outlet cover and the pump housing cooperate to form a pump cavity; the inlet is located at one end of the outlet cover, and the outlet is located on the side wall of the outlet cover; the motor is detachably connected to the pump housing, or the pump housing and the motor are integrally formed. A connecting frame is provided inside the water inlet of the water outlet cover. The end of the connecting frame has an assembly hole. The motor is fixedly connected to the impeller, and the motor shaft is connected to the assembly hole of the connecting frame. The impeller includes a first connecting plate, a second connecting plate, and a plurality of blades evenly disposed between the first connecting plate and the second connecting plate. The first connecting plate has an opening in the middle, the diameter of which is larger than the diameter of the water inlet, and the end of the opening is provided with an arc-shaped guide surface for guiding the water flow.

9. The control circuit for the water pump according to any one of claims 1 to 8, characterized in that: include: AC / DC unit, MCU module, and DC / AC unit, signal detection module and drive circuit connected to MCU module; The input terminal of the AC / DC unit is connected to the power supply, and the output terminal of the AC / DC unit is connected to the motor via the DC / AC unit. The signal detection module is used to detect the start signal and steering control signal, and transmit them to the MCU module; The drive circuit receives signals from the MCU module, amplifies the signals, and transmits them to the DC / AC unit. The DC / AC unit is used to control the motor to rotate in the forward or reverse direction.

10. The control circuit for the water pump as described in claim 9, characterized in that: It also includes a back EMF detection circuit, which is used to collect the back EMF in the water pump and transmit it to the MCU module.

11. An integrated water fitting, characterized in that: The device includes a housing, a drainage mechanism, a drainage base, and a water pump as described in any one of claims 1 to 8. The water pump and the drainage mechanism are installed in the inner cavity of the housing, and the drainage base is installed below the housing. The housing is provided with a water inlet and outlet hole for water supply. At least one of the outlets is connected to the drainage mechanism.

12. The integrated water fitting as described in claim 11, characterized in that: The water outlet is provided in two parts: a first water outlet and a second water outlet. The first water outlet includes a main outlet and a secondary outlet, and the second water outlet includes a main outlet and a secondary outlet, or the second water outlet only includes a main outlet. The main outlet of the first water outlet is a drain outlet, which is connected to the drainage mechanism. The main outlet of the second water outlet is a washing outlet, which is connected to a washing pipe outside the housing.

13. The integrated water fitting as described in claim 11, characterized in that: It also includes a flushing aid pipe; the water outlet is provided with three outlets, including two first outlets and one second outlet. The first outlet includes a main outlet and a secondary outlet, and the second outlet includes a main outlet and a secondary outlet, or the second outlet only includes a main outlet. The main openings of the two first water outlets are a drain outlet and a flushing aid outlet, respectively. The drain outlet is connected to the draining mechanism, and the flushing aid outlet is connected to one end of the flushing aid pipe. The other end of the flushing aid pipe is connected to the drain outlet of the drain base. The main opening of the second water outlet is a washing outlet, which is connected to a washing pipe outside the housing.

14. The integrated water fitting as described in claim 11, characterized in that: It also includes a flushing pipe and a flow distribution component, wherein the flow distribution component is provided with a through flow inlet and at least two flow outlets; The water outlet is provided in two parts: a first water outlet and a second water outlet. The main outlet of the first water outlet is connected to the flow inlet, and the two flow outlets are the drain outlet and the flushing aid outlet. The drain outlet is connected to the drainage mechanism, and the flushing aid outlet is connected to one end of the flushing aid pipe. The other end of the flushing aid pipe is connected to the drain outlet of the drainage base. The main outlet of the second water outlet is the washing outlet, and the washing outlet is connected to the washing pipe outside the housing.

15. The integrated water fitting as described in claim 12, 13, or 14, characterized in that: When rotating in the first direction, the head of the drain outlet is greater than 3m; when rotating in the second direction, the flow rate of the scrubbing outlet is greater than 12L / min, and the head of the drain outlet is less than 2m.

16. The integrated water fitting as described in claim 13 or 14, characterized in that: The flushing aid pipe includes an inverted U-shaped pipe and a flushing aid pipe connected in sequence. One end of the inverted U-shaped pipe is connected to the flushing aid port, and the other end is connected to the flushing aid pipe. The top of the inverted U-shaped pipe is provided with an air hole, and the air hole is higher than the working water level set in the water chamber. The flushing aid is connected to the drainage base, or the flushing aid and the drainage base are integrally formed, and the end of the flushing aid extends out from the drainage outlet of the drainage base; the flushing aid is a venturi tube with a gradually decreasing diameter.

17. A toilet, characterized in that: It includes the water pump according to any one of claims 1 to 8, or the water pump control circuit according to claims 9 to 10, or the integrated water component according to any one of claims 11 to 16.

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