Water pump with emptying structure

Abstract

The utility model discloses a water pump with emptying structure, including the pump shell, the water inlet pipe and the water outlet pipe that communicate with its inner chamber are arranged on the pump shell respectively, the inner chamber of pump shell is provided with the impeller, the drive mechanism drives the rotation of impeller, still include with the water outlet pipe one axial position link's drain pipe, the one end of drain pipe communicates with the inner chamber of water outlet pipe. After water pump stops running, the waste liquid in pump cavity and water outlet pipe can be emptied through the drain pipe, avoid the waste liquid stagnation, thereby solve the problem that the waste liquid stagnation, breed bacteria in the water outlet pipe of existing water pump.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, specifically to a water pump with a venting structure. Background Technology

[0002] Water pumps, which drive impellers to pressurize or transport liquids, are widely used in various equipment, especially playing a crucial role in small household appliances. However, after existing water pumps stop working, some liquid often remains in the pump chamber and outlet pipe. This retained liquid not only easily breeds bacteria, affecting water quality, but can also corrode or clog internal components, thus shortening the pump's lifespan. This problem is particularly prominent in applications with extremely high hygiene requirements, such as baby-safe water supply systems, seriously impacting the hygiene and safety of the equipment and user experience. To ensure the hygiene standards of water supply equipment, there is an urgent need for a solution that can effectively address the problem of liquid retention in the water pump outlet pipe. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a water pump with a venting structure.

[0004] The technical solution adopted by this utility model is as follows: a water pump with a venting structure includes a pump casing, on which an inlet pipe and an outlet pipe are respectively provided, communicating with the inner cavity of the pump casing, and also includes a drain pipe connected to the outlet pipe at an axial position, one end of the drain pipe communicating with the inner cavity of the outlet pipe.

[0005] Preferably, the connection between the drain pipe and the inner cavity of the outlet pipe is located at the lowest radial point of the outlet pipe.

[0006] Preferably, the edge axis of the drain pipe is tangent to the circumference of the outlet pipe.

[0007] Preferably, the central axis of the drain pipe is perpendicular to the central axis of the outlet pipe.

[0008] Preferably, the central axis of the water inlet pipe and the central axis of the water outlet pipe are parallel and both are set along the X-axis.

[0009] Preferably, the central axis of the water outlet pipe is located on the YZ plane and forms an angle with the Y axis.

[0010] Preferably, the included angle is 5-15°.

[0011] Preferably, the drain pipe is integrally formed onto the outlet pipe.

[0012] Preferably, the end of the drain pipe away from the outlet pipe is connected to a liquid drainage assembly, which includes an on / off valve for controlling the opening and closing of the drain pipe and a negative pressure generating device for adjusting the pressure inside the drain pipe.

[0013] The beneficial effects of this utility model are as follows: After the water pump stops running, the liquid in the pump chamber and the outlet pipe can be drained through the drain pipe to avoid liquid stagnation, thereby solving the problem of liquid stagnation and bacterial growth in the outlet pipe of existing water pumps. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0015] Figure 1 This is an overall structural diagram of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model; Figure 3 This is a side view of an embodiment of the present utility model; Figure 4 for Figure 2 Sectional view of the structure at point AA; Figure 5 for Figure 3 Structural cross-section view at point BB; In the diagram, 1 is the pump casing; 2 is the impeller; 3 is the pump shaft; 101 is the volute; and 102 is the motor casing. Detailed Implementation

[0016] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0017] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0018] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] like Figures 1 to 5 As shown in the figure, a water pump with a drainage structure is provided in an embodiment of the present invention. It includes a pump casing 1 and a drive mechanism. The pump casing 1 is provided with an inlet pipe 11 and an outlet pipe 12 that communicate with its inner cavity. The inner cavity of the pump casing 1 is provided with an impeller 2 and a pump shaft 3 that are both concentrically arranged with the liquid inlet. The drive mechanism drives the impeller 2 to rotate around the pump shaft 3. It also includes a drain pipe 13 that is axially connected to the outlet pipe 12. One end of the drain pipe 13 communicates with the inner cavity of the outlet pipe 12.

[0020] With this design, after the water pump stops running, the liquid in the pump chamber and outlet pipe can be drained through the drain pipe, preventing liquid stagnation and thus solving the problem of liquid stagnation and bacterial growth in the outlet pipe of existing water pumps.

[0021] In this embodiment, the driving mechanism is specifically a brushless motor.

[0022] The connection between the drain pipe 13 and the inner cavity of the outlet pipe 12 is located at the lowest radial point of the outlet pipe 12.

[0023] This design ensures that, under the influence of gravity, all residual liquid in the outlet pipe can be collected at the lowest point and effectively discharged through the drain pipe.

[0024] The edge axis of the drain pipe 13 is tangent to the circumference of the outlet pipe 12.

[0025] This design facilitates complete drainage of the drain pipe, preventing liquid from accumulating at the junction of the outlet and drain pipes.

[0026] The central axis of the drain pipe 13 is perpendicular to the central axis of the outlet pipe 12.

[0027] This design allows the drain pipe to exit from the lowest radial point of the outlet pipe in the most direct way, thereby minimizing fluid resistance at the connection and avoiding fluid eddies or stagnation that may occur due to an excessively small angle.

[0028] The central axis of the water inlet pipe 11 and the central axis of the drain pipe 13 are parallel and both are set along the X-axis.

[0029] This setting ensures a smooth fluid path and reduces energy loss at bends.

[0030] The central axis of the water outlet pipe 12 is located on the YZ plane and forms an angle with the Y axis.

[0031] This design prevents fluid from accumulating in the outlet pipe. In this embodiment, the end of the outlet pipe furthest from the pump casing extends upwards.

[0032] The included angle is 5-15°.

[0033] This design ensures smooth fluid flow while preventing fluid buildup in the outlet pipe.

[0034] The drain pipe 13 is integrally formed on the outlet pipe 12. The pump housing 1 includes a volute 101 and a motor housing 102 with openings facing each other and connected. The inlet pipe 11 and the outlet pipe 12 are integrally formed on the volute 101.

[0035] This design simplifies the pump manufacturing process, improves production efficiency, and enhances the overall integrity and sealing of the structure.

[0036] The end of the drain pipe 13 away from the outlet pipe 12 is connected to a liquid drainage assembly, which includes an on / off valve for controlling the opening and closing of the drain pipe 13 and a negative pressure generating device for adjusting the pressure inside the drain pipe 13.

[0037] With this setting, when the water pump is running, the on / off valve closes the drain pipe; when the water pump stops running, the on / off valve opens the drain pipe and activates the negative pressure generating device, so that the pressure in the drain pipe is lower than that in the outlet pipe, thereby sucking out the liquid in the pump casing and the outlet pipe. This method improves the automation level of this venting structure.

[0038] Similarly, the on / off valve can be replaced by a plug. When the water pump is running, the plug seals the end of the drain pipe. When the water pump stops running, the plug is removed, and the drain pipe is connected to a negative pressure generating device to draw out the liquid in the pump casing and the outlet pipe.

[0039] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A water pump with a venting structure, comprising a pump casing (1), wherein an inlet pipe (11) and an outlet pipe (12) communicating with the inner cavity of the pump casing (1) are respectively provided on the pump casing (1), characterized in that: It also includes a drain pipe (13) connected to the outlet pipe (12) at an axial position, one end of which is connected to the inner cavity of the outlet pipe (12).

2. A water pump with a venting structure according to claim 1, characterized in that: The connection between the drain pipe (13) and the inner cavity of the outlet pipe (12) is located at the lowest radial point of the outlet pipe (12).

3. A water pump with a venting structure according to claim 1, characterized in that: The edge axis of the drain pipe (13) is tangent to the circumference of the outlet pipe (12).

4. A water pump with a venting structure according to claim 1, characterized in that: The central axis of the drain pipe (13) is perpendicular to the central axis of the outlet pipe (12).

5. A water pump with a venting structure according to claim 1, characterized in that: The central axis of the inlet pipe (11) and the central axis of the outlet pipe (13) are parallel and both are set along the X-axis.

6. A water pump with a venting structure according to claim 1, characterized in that: The central axis of the water outlet pipe (12) is located on the YZ plane and forms an angle with the Y axis.

7. A water pump with a venting structure according to claim 6, characterized in that: The included angle is 5-15°.

8. A water pump with a venting structure according to claim 1, characterized in that: The drain pipe (13) is integrally formed on the outlet pipe (12).

9. A water pump with a venting structure according to any one of claims 1-8, characterized in that: The end of the drain pipe (13) away from the outlet pipe (12) is connected to a liquid drainage assembly, which includes an on / off valve for controlling the opening and closing of the drain pipe (13) and a negative pressure generating device for adjusting the pressure inside the drain pipe (13).

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