Drainage pump capable of reducing half-load noise

Abstract

The utility model relates to a draining pump capable of reducing half-load noise, which is applied to the field of draining pumps and comprises a water inlet cavity and a draining cavity, a water passing hole is formed between the water inlet cavity and the draining cavity, a water inlet is formed in the water inlet cavity, a water outlet is formed in the draining cavity, and an impeller driven by a central shaft of a draining motor is arranged in the draining cavity. The axial center line of the center shaft coincides with or is lower than the bottom of the water inlet cavity in the vertical direction, and the lower edge of the water passing hole coincides with the bottom of the water inlet cavity. The drainage pump has the technical effects that the residual water amount in the water inlet cavity is reduced, namely the water level height of the residual water in the water inlet cavity is reduced, so that the problem that the noise is large in the half-load state of the drainage pump is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of drainage pumps, and in particular to a drainage pump capable of reducing half-load noise. Background Art

[0002] like Figure 1 As shown, the structure of an existing drainage pump includes a water inlet chamber 1 and a drainage chamber 2, with a water hole 3 between the water inlet chamber 1 and the drainage chamber 2, a water inlet 4 is provided on the water inlet chamber 1, and a water outlet 5 is provided on the drainage chamber 2. An impeller 62 driven by a central axis 61 of a drainage motor 6 is provided in the drainage chamber 2, and the axial centerline of the central axis 61 is higher than the bottom 7 of the water inlet chamber 1.

[0003] As can be seen from the figure, when the residual water level L is generated in the water inlet chamber 1 and the drainage chamber 2, the air will enter the water inlet chamber 1 and the drainage chamber 2 above the residual water level L, and mix with the residual water in the drainage chamber. Under the action of the rotation of the impeller in the drainage chamber, periodic pressure bursts are generated, causing the water-gas mixture in the drainage chamber to emit periodic oscillating impact noise.

[0004] During the drainage process of the drainage pump, when the amount of water is large, that is, the drainage chamber is full of water, since there is no air in the drainage chamber, the drainage chamber can form a negative pressure sufficient for drainage, and the drainage noise is relatively small at this time. When the residual water level L in the water inlet chamber 1 and the drainage chamber 2 corresponds to the residual water level height H, that is, when discharging the residual water in a half-water, half-air and half-load state, because it is not a vacuum pump, this upper drainage pump with a certain head cannot discharge all the residual water to the specified height. Obviously, the more residual water left in the water inlet chamber, the greater the half-load noise caused, and the less residual water left in the water inlet chamber, the smaller the half-load noise caused. How to effectively reduce the half-load noise has become a technical problem that needs to be solved at present. Summary of the invention

[0005] In order to help solve the problem of high noise in the half-load state of the existing drainage pumps, the present application provides a drainage pump with reduced half-load noise, adopting the following technical solution: it includes a water inlet chamber and a drainage chamber, a water hole is provided between the water inlet chamber and the drainage chamber, the water inlet chamber is provided with a water inlet, the drainage chamber is provided with a water outlet, the drainage chamber is provided with an impeller driven by the central axis of the drainage motor, the axial center line of the central axis coincides with the bottom of the water inlet chamber or is lower than the bottom of the water inlet chamber in the up and down directions, and the lower edge of the water hole coincides with the bottom of the water inlet chamber.

[0006] Through the above technical solution, the axial center line of the central axis of the drainage motor coincides with the bottom of the water inlet chamber in the up and down directions, or is lower than the bottom of the water inlet chamber, and the lower edge of the water hole coincides with the bottom of the water inlet chamber, thereby reducing the amount of residual water in the water inlet chamber, that is, lowering the residual water level in the water inlet chamber, effectively solving the problem of high noise when half load.

[0007] In a specific possible implementation manner, a hose for connecting the water inlet chamber and the drainage chamber is provided between the water inlet chamber and the drainage chamber.

[0008] Through the above technical solution, the water vapor mixture can be internally circulated between the water inlet chamber and the drainage chamber, consuming the kinetic energy of the water vapor impact in the drainage chamber, thereby reducing the half-load noise.

[0009] In a specific possible implementation manner, the volume of the water inlet chamber is greater than the volume of the water outlet chamber.

[0010] Through the above technical solution, the residual water in the water inlet cavity can easily flow into the drainage cavity, so that the drainage cavity quickly becomes full of water and generates sufficient negative pressure to reduce drainage noise.

[0011] In a specific possible implementation manner, the axial centerline of the central axis coincides with the axial centerline of the drainage cavity.

[0012] Through the above technical solution, the impeller drainage force can be balanced and the stability of the impeller drainage can be improved.

[0013] In a specific possible implementation manner, the water outlet is located at the top of the drainage cavity and opens upward.

[0014] Through the above technical solution, efficient discharge of water by the impeller can be achieved.

[0015] In a specific possible implementation manner, the water inlet cavity, the drainage cavity, the water hole, the water inlet and the water outlet are integrally injection-molded from engineering plastics.

[0016] The above technical solution can improve production efficiency and simplify assembly process.

[0017] In a specific implementation manner, the impeller is made of engineering plastic.

[0018] In a specific implementation manner, the hose is made of rubber.

[0019] To sum up, the present application has the following beneficial technical effects: the axial center line of the central axis of the drainage motor coincides with the bottom of the water inlet chamber in the up and down directions, or is lower than the bottom of the water inlet chamber, and the lower edge of the water hole coincides with the bottom of the water inlet chamber, thereby reducing the amount of residual water in the water inlet chamber, that is, lowering the residual water level in the water inlet chamber, effectively solving the problem of high noise when half load. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an existing drainage pump.

[0021] Figure 2 This is a schematic structural diagram of a drainage pump for reducing half-load noise according to Embodiment 1.

[0022] Figure 3 This is a schematic diagram of the structure of a drainage pump for reducing half-load noise according to Embodiment 2.

[0023] Figure numerals: 1, water inlet chamber; 2, drainage chamber; 21, axial center line; 3, water hole; 31, lower edge; 4, water inlet; 5, water outlet; 6, drainage motor; 61, center axis; 62, impeller; 7, bottom; 8, hose. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-3 This application is described in further detail.

[0025] Reference Figure 1 In the process of using the existing drainage pump, when the drainage chamber 2 is full of water, the water in the drainage chamber 2 is driven by the central shaft 61 of the drainage motor 6 to drive the impeller 62 to be discharged through the water outlet 5 on the drainage chamber 2. This drainage state is full water discharge, that is, full load state, and the drainage noise in the full load state is very small. When the drainage chamber 2 is not full of water, that is, air enters the drainage chamber 2, the impeller 62 discharges the residual water in the drainage chamber 2. However, due to the entry of air into the drainage chamber 2, sufficient drainage negative pressure cannot be formed in the drainage chamber 2, and the residual water in the drainage chamber 2 cannot be discharged through the water outlet 5, that is, it enters a half-load state, and the drainage noise in the half-load state is very large.

[0026] When the amount of water accumulated in the drainage chamber 2 is sufficient, the drainage chamber 2 reaches a full load state again. Therefore, the periodic repetition between full load and half load causes the periodic appearance of half load noise. In the half load state, obviously, the more residual water in the water inlet chamber 1, the greater the half load noise caused, and the less residual water in the water inlet chamber 1, the smaller the half load noise caused. Therefore, the residual water in the water inlet chamber 1 is reduced as much as possible to reduce the half load noise.

[0027] Based on the above problems, an embodiment of the present application discloses a drainage pump that reduces half-load noise.

[0028] Embodiment 1

[0029] Reference Figure 2 A drainage pump for reducing half-load noise includes a water inlet chamber 1 and a drainage chamber 2, a water hole 3 is provided between the water inlet chamber 1 and the drainage chamber 2, a water inlet 4 is provided on the water inlet chamber 1, a water outlet 5 is provided on the drainage chamber 2, an impeller 62 driven by a central axis 61 of a drainage motor 6 is provided in the drainage chamber 2, and the axial center line of the central axis 61 coincides with the bottom 7 of the water inlet chamber 1 in the vertical direction. In the embodiment of the present application, Figure 2The direction marked in is the up-down direction, and the lower edge 31 of the water hole 3 coincides with the bottom 7 of the water inlet cavity 1 .

[0030] Reference Figure 2 The water inlet chamber 1 and the drainage chamber 2 are connected by a hose 8, the hose 8 is made of rubber, the volume of the water inlet chamber 1 is greater than the volume of the drainage chamber 2, the axial center line of the central axis 61 coincides with the axial center line 21 of the drainage chamber 2, the water outlet 5 is located at the top of the drainage chamber 2 and opens upward, the water inlet chamber 1, the drainage chamber 2, the water hole 3, the water inlet 4 and the water outlet 5 are integrally injection molded by engineering plastics, and the impeller 62 is made of engineering plastics.

[0031] The implementation principle of the embodiment of the present application is: start the drainage motor 6 to drive the impeller 62 at the output end of the drainage motor 6 to rotate, thereby draining the residual water in the drainage chamber 2. Since the lower edge 31 of the water hole 3 coincides with the bottom 7 of the water inlet chamber 1, and the axial center line of the central axis 61 of the drainage motor 6 coincides with the bottom 7 of the water inlet chamber 1 in the up and down directions, the residual water level height H1 corresponding to the residual water level L1 of the drainage chamber 2 is significantly reduced, further reducing the residual water amount in the water inlet chamber 1, thereby effectively reducing the half-load noise of the drainage pump.

[0032] Embodiment 2

[0033] Reference Figure 3 A drainage pump for reducing half-load noise includes a water inlet chamber 1 and a drainage chamber 2, a water hole 3 is provided between the water inlet chamber 1 and the drainage chamber 2, a water inlet 4 is provided on the water inlet chamber 1, a water outlet 5 is provided on the drainage chamber 2, an impeller 62 driven by a central shaft 61 of a drainage motor 6 is provided in the drainage chamber 2, and the axial center line of the central shaft 61 is lower than the bottom 7 of the water inlet chamber 1 in the vertical direction. In the embodiment of the present application, Figure 3 The direction marked in is the up-down direction, and the lower edge 31 of the water hole 3 coincides with the bottom 7 of the water inlet cavity 1 .

[0034] Reference Figure 3 The water inlet chamber 1 and the drainage chamber 2 are connected by a hose 8, the hose 8 is made of rubber, the volume of the water inlet chamber 1 is greater than the volume of the drainage chamber 2, the axial center line of the central axis 61 coincides with the axial center line 21 of the drainage chamber 2, the water outlet 5 is located at the top of the drainage chamber 2 and opens upward, the water inlet chamber 1, the drainage chamber 2, the water hole 3, the water inlet 4 and the water outlet 5 are integrally injection molded by engineering plastics, and the impeller 62 is made of engineering plastics.

[0035] Compared with Example 1, Example 2 is lower than the bottom 7 of the water inlet chamber 1 in the vertical direction because the central axis 61 of the drainage motor 6 is lower than the bottom 7 of the water inlet chamber 1 in the vertical direction, compared with the case in which the axial center line of the central axis 61 of the drainage motor 6 in Example 1 coincides with the bottom 7 of the water inlet chamber 1 in the vertical direction, so the residual water level height H2 corresponding to the residual water level L2 of the drainage chamber 2 is further reduced, and the residual water amount in the water inlet chamber 1 is further reduced, so the effect of reducing the half-load noise of the drainage pump is more obvious.

[0036] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A drainage pump with reduced half-load noise, characterized in that: The invention comprises a water inlet chamber (1) and a drainage chamber (2), wherein a water passage hole (3) is provided between the water inlet chamber (1) and the drainage chamber (2), the water inlet chamber (1) is provided with a water inlet (4), the drainage chamber (2) is provided with a water outlet (5), the drainage chamber (2) is provided with an impeller (62) driven by a central axis (61) of a drainage motor (6), the axial center line of the central axis (61) coincides with or is lower than the bottom (7) of the water inlet chamber (1) in the vertical direction, and the lower edge (31) of the water passage hole (3) coincides with the bottom (7) of the water inlet chamber (1).

2. The drainage pump with reduced half-load noise according to claim 1, characterized in that: A hose (8) for connecting the water inlet chamber (1) and the drainage chamber (2) is provided between the water inlet chamber (1) and the drainage chamber (2).

3. The drainage pump with reduced half-load noise according to claim 1, characterized in that: The volume of the water inlet chamber (1) is greater than the volume of the water discharge chamber (2).

4. The drainage pump with reduced half-load noise according to claim 3, characterized in that: The axial centerline of the central axis (61) coincides with the axial centerline (21) of the drainage cavity (2).

5. The drainage pump with reduced half-load noise according to claim 4, characterized in that: The water outlet (5) is located at the top of the drainage cavity (2) and opens upward.

6. The drainage pump with reduced half-load noise according to claim 5, characterized in that: The water inlet cavity (1), the water discharge cavity (2), the water passage hole (3), the water inlet (4) and the water outlet (5) are integrally formed by injection molding of engineering plastics.

7. The drainage pump with reduced half-load noise according to claim 1, characterized in that: The material of the impeller (62) is engineering plastic.

8. The drainage pump with reduced half-load noise according to claim 2, characterized in that: The material of the hose (8) is rubber.

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