Washing machine drainage pump capable of preventing spray pipe from being blocked and washing machine

Abstract

The utility model discloses a washing machine draining pump capable of preventing a spraying pipe from being blocked and a washing machine. The washing machine draining pump comprises a pump shell and a motor with an impeller. The pump shell is provided with a water inlet cavity and a water outlet cavity which are communicated with each other, the water inlet cavity is communicated with a water inlet pipe, and the water outlet cavity is communicated with a washing water outlet pipe and a spraying pipe; the impeller extends into the drainage cavity; and the drainage cavity is provided with a filter screen for preventing foreign matters from entering the spraying pipe at the opening of the spraying pipe. The draining pump of the washing machine can effectively prevent foreign matters from blocking the filter screen or the spraying pipe, so that the foreign matters in the draining cavity can be drained out of the box body of the washing machine only through the washing water draining pipe, and the situation that spraying water is not smoothly sprayed or is not sprayed is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machine drain pumps, in particular to a washing machine drain pump for preventing blockage of a spray pipe, and also relates to a washing machine including the above drain pump. Background Art

[0002] The drainage of a washing machine is mainly achieved through a drain pump. Currently, the commonly used drain pumps for washing machines mainly include a motor with an impeller and a pump housing. When the motor drives the impeller to rotate, the washing water is discharged out of the washing machine box by the impeller through the washing water drain pipe, and the spray water is sprayed into the washing machine drum by the impeller through the spray pipe and the nozzle.

[0003] Therefore, in the above drain pump, when the motor drives the impeller to rotate, foreign matters entering the drainage cavity can either be discharged out of the washing machine box through the washing water drain pipe, or enter the spray pipe or the nozzle connected to the spray pipe through the spray drain pipe, thereby causing blockage of the spray pipe or the nozzle, resulting in poor or even no spraying of the spray water. Summary of the Utility Model

[0004] Purpose of the utility model: One of the purposes of the utility model is to provide a washing machine drain pump that can effectively prevent foreign matters from blocking the spray pipe, so that all foreign matters in the drainage cavity can only be discharged out of the washing machine box through the washing water drain pipe; another purpose of the utility model is to provide a washing machine including the above drain pump.

[0005] Technical solution: The washing machine drain pump described in the utility model includes a pump housing and a motor with an impeller; the pump housing is provided with a water inlet cavity and a drainage cavity that communicate with each other, the water inlet cavity is connected with a water inlet pipe, and the drainage cavity is connected with a washing water drain pipe and a spray pipe; the impeller extends into the drainage cavity; a filter screen for blocking foreign matters from entering the spray pipe is provided at the opening of the drainage cavity where the spray pipe is located.

[0006] Wherein, the filter screen is arc-shaped, and the center of the curved surface of the filter screen is concentric with the center of the drainage cavity and the axis of the impeller.

[0007] Wherein, a plurality of filter holes are provided on the filter screen, the number of filter holes is at least five, and the center line of each filter hole is parallel to the center line of the spray pipe, which is convenient for the impeller to discharge the spray water from the drainage cavity and minimizes the influence of the filter screen on the spray water flow rate.

[0008] Wherein, an axially extending convex platform is provided on the side wall of the drainage cavity, the convex platform is located between the spray pipe and the washing water drain pipe, a positioning groove is opened on the convex platform, and the filter screen is fixed in the drainage cavity through the positioning groove, and the arc-shaped curved surface of the filter screen fits with the inner wall of the drainage cavity.

[0009] Wherein, an annular partition is provided between the water inlet chamber and the water drainage chamber, and the annular opening of the annular partition is a water passing hole communicating the water inlet chamber and the water drainage chamber.

[0010] Wherein, the inner diameter of the spray pipe is not greater than the inner diameter of the washing water drain pipe.

[0011] Wherein, a pre-filter is further provided in the water inlet chamber. After the water entering the water inlet chamber is filtered by the water passing sleeve in the pre-filter, it enters the water drainage chamber through the water passing hole. The setting of the pre-filter can effectively block larger foreign objects from entering the water drainage chamber from the water inlet chamber, thereby preventing the filter holes on the filter net from being blocked.

[0012] A washing machine including the above-mentioned washing machine drain pump.

[0013] Beneficial effects: Compared with the prior art, the present utility model has the following advantages: The washing machine drain pump of the present utility model can effectively prevent foreign objects from blocking the filter net or the spray pipe, thereby effectively avoiding the situation of poor or no spray of the spray water; the present utility model blocks larger foreign objects from entering the water drainage chamber through the pre-filter, thereby preventing the filter net from being blocked, and the filter net blocks smaller foreign objects from entering the spray pipe or the nozzle, thereby preventing the spray pipe or the nozzle from being blocked, so that the foreign objects entering the water drainage chamber can only be discharged out of the washing machine box through the washing water drain pipe. Description of the Drawings

[0014] Figure 1 It is an exploded view of the washing machine drain pump of the present utility model;

[0015] Figure 2 It is a schematic structural diagram of the washing machine drain pump of the present utility model;

[0016] Figure 3 It is a front view of the washing machine drain pump of the present utility model;

[0017] Figure 4 It is Figure 3 A sectional view taken along the A-A direction in

[0018] Figure 5 It is Figure 3 A sectional view taken along the B-B direction in

[0019] Figure 6 It is Figure 5 A partial enlarged view of I in

[0020] Figure 7 It is a schematic structural diagram of the filter net;

[0021] Figure 8 It is a schematic structural diagram after the filter net and the pump housing are assembled;

[0022] Figure 9It is a schematic structural diagram of a pump housing;

[0023] Figure 10 It is a schematic structural principle diagram of the drainage path and spray path of washing water in a washing machine. Specific embodiments

[0024] As Figures 1 to 9 As shown, the drainage pump of the washing machine of the present utility model includes a motor 1, a filter screen 2, a pump housing 3 and a pre-filter 4. The pump housing 3 has a water inlet chamber 31, a water inlet pipe 32 communicating with the water inlet chamber 31, a drainage chamber 33, a washing water drainage pipe 34 and a spray pipe 35 communicating with the drainage chamber 33, and an annular partition 36 installed between the water inlet chamber 31 and the drainage chamber 33. The annular opening of the annular partition 36 is a water passing hole 37 for communicating the water inlet chamber and the drainage chamber (the water passing hole 37 is used to communicate the water inlet chamber 31 with the drainage chamber 33); a convex platform 38 extending axially is provided in the drainage chamber 33. The convex platform 38 is located between the spray pipe 35 and the washing water drainage pipe 34. A positioning groove 39 is provided on the convex platform 38, and the positioning groove 39 extends to the spray pipe 35. Filter holes 21 are provided on the curved surface of the filter screen 2. One end of the filter hole 21 has a positioning portion 22, and the other end has an inclined surface 23. The positioning portion 22 is inserted into the positioning groove 39, and the inclined surface 23 is attached to the inner wall of the drainage chamber 33 close to the spray pipe 35. The filter hole 21 faces the spray pipe 35; the motor 1 has an impeller 11, and the impeller 11 extends into the drainage chamber 33, and the pre-filter 4 is placed in the water inlet chamber 31.

[0025] Among them, the center of the curved surface of the filter screen 2 is concentric with the center of the drainage chamber 33 and the axis of the impeller 11. The number of the filter holes 21 is at least five, and the center line O' of each filter hole 21 is parallel to the center line O of the spray pipe 35, which is convenient for the impeller 11 to discharge the spray water from the drainage chamber 33 and minimizes the influence of the filter screen 2 on the spray water flow rate.

[0026] The pre-filter 4 has an annular bottom plate 41, a knob thread 42 and a water passing sleeve 43. The annular bottom plate 41 is installed close to the partition 36. The knob thread 42 is engaged with the stop thread 39' of the pump housing 3. The water passing sleeve 43 faces the water passing hole 37 in the axial direction. The setting of the pre-filter 4 can, on the one hand, close the opening of the water inlet chamber 31, and on the other hand, effectively block larger foreign objects from entering the drainage chamber 33 from the water inlet chamber 31, thereby effectively preventing the filter holes 21 on the filter screen 2 from being blocked.

[0027] The inner diameter of the spray pipe 35 is not greater than the inner diameter of the washing water drainage pipe 34, which is convenient for the water flow to form a larger jet pressure in the spray pipe 35. The filter screen 2, the pump housing 3 and the pre-filter 4 are all injection molded from engineering plastics, which is convenient for production and manufacturing.

[0028] As Figure 10As shown in the figure, the present utility model also relates to a washing machine including the above-mentioned washing machine drain pump. The washing machine includes a water outlet connecting pipe 5, a drum 6, a washing water drain pipe 7, a spray drain pipe 8 and a nozzle 9. One end of the water outlet connecting pipe 5 is communicated with the water inlet pipe 32 of the drain pump, and the other end is connected to the inside of the drum 6. One end of the washing water drain pipe 7 is communicated with the washing water drain pipe 34 of the drain pump, and the other end penetrates through the box body of the washing machine and is communicated with the outside. One end of the spray drain pipe 8 is communicated with the spray pipe 35 of the drain pump, and a nozzle 9 is installed at the other end. The nozzle 9 is communicated to the inside of the drum 6.

[0029] When the laundry in the drum 6 needs to be sprayed, the water flow in the drum 6 sequentially passes through the water outlet connecting pipe 5, the water inlet pipe 32 (entering the water inlet cavity from the water inlet pipe of the drain pump), the water inlet cavity 31, the water passing sleeve 43 of the pre-filter 4, the water passing holes 37 and the drain cavity 33. Under the centrifugal force of the impeller 11, the water flow enters the spray pipe 35 through the filter holes 21 on the curved surface of the filter net 2, enters the spray drain pipe 8 from the spray pipe 35, and then is sprayed into the drum 6 through the nozzle 9. At this time, the filter net 2 will block some smaller foreign objects in the drain cavity 33. Under the centrifugal force of the impeller 11, these smaller foreign objects are discharged outside the box body of the washing machine through the washing water drain pipe 34 via the washing water drain pipe 7, so that the smaller foreign objects will not enter the spray pipe 35 and cause blockage of the spray pipe 35 or the nozzle 9.

[0030] The pre-filter 4 can block larger foreign objects from entering the drain cavity 33, thus effectively avoiding blockage of the filter net 2, and the filter net 2 can block smaller foreign objects from entering the spray pipe 35 or the nozzle 9, thus effectively preventing blockage of the spray pipe 35 or the nozzle 9.

Claims

1. A washing machine drain pump for preventing blockage of a spray pipe, comprising a pump housing (3) and a motor (1) with an impeller (11); the pump housing (3) is provided with a water inlet cavity (31) and a drain cavity (33) that communicate with each other, the water inlet cavity (31) is communicated with a water inlet pipe (32), and the drain cavity (33) is communicated with a washing water drain pipe (34) and a spray pipe (35); the impeller (11) extends into the drain cavity (33); characterized in that: At the opening of the spray pipe (35) of the drainage cavity (33), a filter net (2) is provided to prevent foreign matters from entering the spray pipe (35).

2. The washing machine drain pump for preventing spray pipe blockage according to claim 1, characterized in that: The filter net (2) is arc-shaped, and the center of the curved surface of the filter net (2) is concentric with the center of the drainage cavity (33) and the axis of the impeller (11).

3. The washing machine drain pump for preventing spray pipe blockage according to claim 2, characterized in that: A plurality of filter holes (21) are provided on the filter net (2), and the center lines of each filter hole (21) are parallel to the center line of the spray pipe (35).

4. The washing machine drain pump for preventing spray pipe blockage according to claim 1, characterized in that: An axially extending boss (38) is provided on the side wall of the drainage cavity (33). The boss (38) is located between the spray pipe (35) and the washing water drain pipe (34). A positioning groove (39) is provided on the boss (38). The filter net (2) is fixed in the drainage cavity (33) through the positioning groove (39), and the arc-shaped curved surface of the filter net (2) is attached to the inner wall of the drainage cavity (33).

5. The washing machine drain pump for preventing blockage of the spray pipe according to claim 4, characterized in that: An annular partition (36) is provided between the water inlet cavity (31) and the drainage cavity (33). The annular opening of the annular partition (36) is a water passing hole (37) that communicates the water inlet cavity (31) and the drainage cavity (33).

6. The washing machine drain pump for preventing blockage of the spray pipe according to claim 1, characterized in that: The inner diameter of the spray pipe (35) is not greater than the inner diameter of the washing water drain pipe (34).

7. The washing machine drain pump for preventing spray pipe blockage according to claim 1, characterized in that: It further includes a pre-filter (4) provided in the water inlet cavity (31). After the water entering the water inlet cavity (31) is filtered by the water passing sleeve (43) in the pre-filter (4), it enters the drainage cavity (33) through the water passing hole (37).

8. A washing machine including the washing machine drain pump according to any one of claims 1 to 7.

Images