A noise-reducing integrated drainage and circulation pump and washing machine

Abstract

The application discloses a drainage and circulation integrated pump with noise reduction and a washing machine. The pump is characterized by the following: a through groove is arranged between a boss on a partition plate and an inner wall surface of a drainage cavity; the through groove is provided with a washing water noise reduction port near a washing water drainage outlet and a circulating water noise reduction port near a circulating water drainage outlet; the washing water noise reduction port and the circulating water noise reduction port are communicated with the through groove; the two sides of the boss form a washing water drainage side wall and a circulating water drainage side wall respectively; and an impeller is arranged in the drainage cavity. When the impeller discharges washing water along the washing water drainage side wall through the washing water drainage outlet, the washing water noise reduction port and the through groove reduce the noise of the washing water discharge; when the impeller discharges circulating water along the circulating water drainage side wall through the circulating water drainage outlet, the circulating water noise reduction port and the through groove reduce the noise of the circulating water discharge. The periodic shock noise caused by the impeller during the washing water discharge and the circulating water discharge is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of drainage pump technology, specifically to a noise-reducing integrated drainage and circulation pump and a washing machine. Background Technology

[0002] Washing machine drainage is mainly achieved through a drain pump. Currently, commonly used drain pumps mainly consist of a motor and an impeller. When the motor drives the impeller to rotate, the washing water or circulating water is drawn into the shaft of the impeller. As the impeller rotates, the washing water is discharged or the circulating water is circulated.

[0003] Figure 1 An existing drain pump structure is provided, which includes an inlet chamber, a drain chamber (3), an inlet pipe communicating with the inlet chamber, a washing water drain outlet (4) and a circulating water drain outlet (5) communicating with the drain chamber (3), an impeller (16) rotatably installed in the drain chamber (3), and a boss (8′) located between the washing water drain outlet (4) and the circulating water drain outlet (5). The boss (8′) has a water flow blocking function. Its purpose is to prevent some washing water from being discharged from the washing water drain outlet (4) or circulating back into the drain chamber when the washing water is discharged from the washing water drain outlet (4) under the action of the impeller (16). Similarly, when the circulating water is discharged from the circulating water drain outlet (5), the boss (8′) prevents the washing water from being discharged from the washing water drain outlet (4) or circulating back into the drain chamber. However, the existing drain pump structure suffers from high noise levels. This is because the boss (8') blocks the space between the washing water drain outlet (4) and the circulating water drain outlet (5). When the washing water is discharged through the washing water drain outlet (4) or the circulating water is discharged through the circulating water drain outlet (5), the water flow impacts the side wall of the boss (8'), generating periodic oscillating impact noise, which severely reduces the user experience of the washing machine. In addition, when the washing water or circulating water is reflected back to the inner circumference of the drain chamber, it creates an impact and counterflow with the washing water or circulating water rotating with the impeller. Therefore, there is an urgent need to develop a drain and circulation integrated pump that can reduce noise. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a noise-reducing integrated drainage and circulation pump that can reduce the impact noise generated during both drainage and circulation processes.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A noise-reducing integrated drainage and circulation pump includes an inlet chamber, a drain chamber, an inlet pipe communicating with the inlet chamber, a washing water drain outlet and a circulating water drain outlet communicating with the drain chamber, a partition installed between the inlet chamber and the drain chamber, a water passage hole opened in the partition, and an impeller rotatably installed in the drain chamber. The water passage hole is used to communicate the inlet chamber and the drain chamber. The drain chamber is characterized by having an axially extending boss located at the top of the partition between the circulating water drain outlet and the washing water drain outlet. A through groove is formed between the boss and the inner wall of the drain chamber. The opening of the through groove on one side adjacent to the washing water drain outlet is a washing water noise reduction port, and the opening on the other side adjacent to the circulating water drain outlet is a circulating water noise reduction port. The two sides of the boss respectively form a washing water drain sidewall and a circulating water drain sidewall.

[0007] When the washing water is drained, the impeller rotates towards the washing water drain outlet, creating a negative pressure in the drain chamber. The washing water enters the inlet chamber, passes through the water hole into the drain chamber, and is discharged through the washing water drain outlet under the action of the impeller rotation. The washing water noise reduction port and the through groove divert the washing water.

[0008] When the circulating water is drained, the impeller rotates toward the circulating water drain outlet, creating a negative pressure in the drain chamber. The circulating water enters the inlet chamber, passes through the water hole into the drain chamber, and is discharged through the circulating water drain outlet under the action of the impeller rotation. The circulating water is also diverted by the circulating water noise reduction port and the through channel.

[0009] In the above technical solution, when the impeller discharges washing water through the washing water drain outlet along the direction of the washing water drain sidewall, the washing water is discharged from the washing water drain outlet. At the same time, the water vapor pressure generated by the water flow under the action of the impeller rotation will be depressurized in sequence through the washing water noise reduction port, the through groove and the circulating water noise reduction port, and flow into the drain cavity. This effectively reduces the impact of the washing water on the washing water drain sidewall and the impact noise reflected to the inner circumferential surface of the drain cavity near the washing water drain outlet.

[0010] When the impeller discharges circulating water through the circulating water outlet along the direction of the circulating water drainage sidewall, the circulating water is discharged from the circulating water drainage outlet. At the same time, the water vapor pressure generated by the water flow under the action of the impeller rotation will be depressurized in sequence through the circulating water noise reduction port, the through groove and the washing water noise reduction port, and flow into the drainage chamber. This effectively reduces the impact of the circulating water on the circulating water drainage sidewall and the impact noise reflected to the inner circumferential surface of the drainage chamber near the circulating water drainage outlet.

[0011] Its further feature is that,

[0012] The inner wall surface of the boss is an arc-shaped surface. The boss is concentrically arranged with the impeller, and a gap of 0.2mm to 1mm is provided between the inner wall surface of the boss and the outer circular surface of the impeller.

[0013] Preferably, the width of the openings on both sides of the through groove is in the range of 0.3mm to 2mm;

[0014] Preferably, the volume of the water inlet chamber is larger than the volume of the water outlet chamber;

[0015] Preferably, the inner wall of the drain cavity is provided with a raised arc-shaped drain guide. One end of the drain guide extends toward the washing water drain outlet to form a washing water drain guide, and the other end extends toward the circulating water drain outlet to form a circulating water drain guide. The guide surface of the washing water drain guide is parallel to the washing water drain sidewall, and the guide surface of the circulating water drain guide is parallel to the circulating water drain sidewall.

[0016] Preferably, the inner wall surface of the boss is provided with rib plate I and / or rib plate II facing the impeller. Rib plate I extends from the washing water drain sidewall along the top of the partition to the outer edge of the water passage hole, and rib plate II extends from the circulating water drain sidewall along the top of the partition to the outer edge of the water passage hole. One end face of rib plate I is located in the same plane as the washing water drain sidewall, and one end face of rib plate II is located in the same plane as the circulating water drain sidewall.

[0017] Preferably, the axial height of stiffener I and stiffener II is 0.2 to 0.4 times the axial height of the boss;

[0018] Preferably, the inner diameter of the circulating water drain outlet is not greater than the inner diameter of the washing water drain outlet;

[0019] Preferably, the axis of the washing water drain outlet and the axis of the circulating water drain outlet are located on the same horizontal plane.

[0020] Preferably, the water inlet cavity, water inlet pipe, drain cavity, washing water drain outlet, and circulating water drain outlet are integrally injection molded.

[0021] A washing machine includes a water outlet connecting pipe, a drum, a washing water drain pipe and a circulating water drain pipe, and the above-mentioned integrated drain and circulation pump. One end of the water outlet connecting pipe is connected to a water inlet pipe, and the other end is connected to the inside of the drum. One end of the washing water drain pipe is connected to the washing water drain outlet, and the other end passes through the casing of the washing machine and is connected to the outside. One end of the circulating water drain pipe is connected to the circulating water drain outlet, and the other end is connected to the inside of the drum.

[0022] When the washing machine discharges washing water: the washing water in the drum is discharged sequentially through the water outlet connection pipe, the water inlet pipe of the integrated drainage circulation pump, the water inlet chamber, the water passage hole, the drain chamber, the washing water drain outlet, and the washing water drain pipe;

[0023] When the washing machine's circulating water is circulating: the circulating water in the drum passes through the outlet connection pipe, the inlet pipe of the integrated drainage and circulation pump, the inlet chamber, the water passage hole, the drain chamber, the circulating water drain outlet, the circulating water drain pipe, and the circulating water diversion pipe in sequence to circulate back into the drum.

[0024] Its further feature is that,

[0025] The other end of the circulating water drainage pipe is connected to the drum through a circulating water diversion pipe. The circulating water diversion pipe includes at least three pipes, one end of each of the three pipes is connected to the circulating water drainage pipe, and the other end is connected to the drum.

[0026] The above-described structure of this invention achieves the following beneficial effects: The rotation of the impeller in the drain chamber causes the washing water to be discharged along the washing water drain outlet. The pressure generated by the washing water impacting the drain sidewall through the noise reduction port and the through channel is relieved, thereby reducing the impact force of the washing water on the drain sidewall, reducing impact noise, and simultaneously reducing the amount of washing water flowing back to the inner circumference of the drain chamber, reducing backflow impact noise, and also reducing backflow of washing water, ensuring smooth discharge of washing water along the drain outlet. Similarly, the rotation of the impeller in the drain chamber causes the circulating water to be discharged along the circulating water drain outlet. The pressure generated by the circulating water impacting the drain sidewall through the noise reduction port and the through channel is relieved, thereby reducing the impact force of the circulating water on the drain sidewall, reducing impact noise, and simultaneously reducing the amount of circulating water flowing back to the inner circumference of the drain chamber, reducing backflow impact noise, and also reducing backflow of circulating water, ensuring smooth discharge of circulating water along the drain outlet. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an existing drainage pump.

[0028] Figure 2 This is a schematic diagram of the main structure of the integrated drainage and circulation pump of the present invention;

[0029] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0030] Figure 4 for Figure 2 Cross-sectional view along the BB direction;

[0031] Figure 5 This is a three-dimensional structural diagram of the integrated drainage and circulation pump of the present invention (impeller omitted);

[0032] Figure 6 This is a side view of the integrated drainage and circulation pump of the present invention (impeller omitted);

[0033] Figure 7 for Figure 6 A cross-sectional view along the DD direction;

[0034] Figure 8 This is a three-dimensional structural diagram of the impeller in the integrated drainage and circulation pump of the present invention;

[0035] Figure 9 This is a schematic diagram of the washing water discharge path structure of the washing machine of the present invention;

[0036] Figure 10 This is a schematic diagram of the circulating water circulation path structure of the washing machine of the present invention. Detailed Implementation

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or device.

[0040] Figure 1 An existing drain pump structure is provided, comprising an inlet chamber (1), a drain chamber (3), an inlet pipe communicating with the inlet chamber (1), a washing water drain outlet (4) and a circulating water drain outlet (5) communicating with the drain chamber (3), an impeller (16) rotatably mounted in the drain chamber (3), and a boss (8') located between the washing water drain outlet (4) and the circulating water drain outlet (5). Figure 1As can be seen, when the impeller (16) rotates in the direction of F1 to drain water, the washing water is discharged from the washing water drain outlet (4). However, due to the presence of the boss (8′), the water flow will generate periodic pressure under the rotation of the impeller (16), thereby generating a water pressure impact force F1 on the side of the boss (8′) near the washing water drain outlet (4). The washing water is reflected to the inner circumferential surface of the drain cavity (3) near the washing water drain outlet (4), producing a periodic oscillating impact noise. This impact noise is more severe, especially in the half-water and half-air (i.e., half-load) state. In addition, when the washing water is reflected to the inner circumferential surface of the drain cavity, it creates an impact counterflow with the washing water that rotates with the impeller to the washing water drain outlet (4), affecting the smooth discharge of the washing water.

[0041] Similarly, when the impeller (16) rotates in the direction of F2 to drain water, the circulating water is discharged from the circulating water drain outlet (5). Likewise, due to the presence of the boss (8′), the water flow will generate periodic pressure bursts under the action of the impeller (16) rotation, thereby generating a water pressure impact force F2 on the side of the boss (8′) near the circulating water drain outlet (5). The circulating water is reflected to the inner circumferential surface of the drain chamber (3) near the circulating water drain outlet (5), emitting periodic oscillating impact noise. In addition, when the circulating water is reflected to the inner circumferential surface of the drain chamber, it creates an impact counterflow with the circulating water that rotates with the impeller to the circulating water drain outlet (5), affecting the smooth discharge of the circulating water.

[0042] Therefore, in the existing drainage pump structure, the setting of the boss (8′), although beneficial for achieving two discharge states: circulating water discharge and washing water discharge, also increases the noise in both discharge states and reduces the drainage efficiency of washing water or circulating water. To address the technical problems of high noise and low drainage efficiency of washing water or circulating water in the existing drainage pump structure, the following is a specific embodiment of a noise-reducing integrated drainage and circulation pump.

[0043] like Figures 2 to 7As shown, a noise-reducing integrated drainage and circulation pump includes an inlet chamber (1), a drain chamber (3), an inlet pipe (2) communicating with the inlet chamber (1), a washing water drain outlet (4) and a circulating water drain outlet (5) communicating with the drain chamber (3), a partition plate installed between the inlet chamber (1) and the drain chamber (3), a water passage hole (7) opened in the partition plate (6), an impeller (16) rotatably installed in the drain chamber (3), and a boss located in the drain chamber and extending axially. The water passage hole (7) is used to connect the inlet chamber (1) and the drain chamber. (3) Connected, the boss (8) is located at the top of the partition (6) between the circulating water drain outlet (5) and the washing water drain outlet (4). A through groove (10) is provided between the boss (8) and the inner wall surface (9) of the drain cavity (3). The opening of the through groove (10) on the side adjacent to the washing water drain outlet is the washing water noise reduction port (11), and the opening on the other side adjacent to the circulating water drain outlet is the circulating water noise reduction port (12). The two sides of the boss (8) respectively form the washing water drain sidewall (13) and the circulating water drain sidewall (14).

[0044] In this embodiment, the opening size of the washing water noise reduction port (11) in the radial direction along the washing water drain sidewall ranges from 0.5mm to 2mm, and the opening size of the circulating water noise reduction port (12) in the radial direction along the circulating water drain sidewall ranges from 0.3mm to 2mm. If the opening size of the washing water noise reduction port (11) is less than 0.5mm and the opening size of the circulating water noise reduction port (12) is less than 0.3mm, then the pressure relief capacity of the through groove (10) is poor and it cannot achieve noise reduction. Low efficiency. If the opening size of the washing water noise reduction port (11) and the circulating water noise reduction port (12) is greater than 2mm, it will easily lead to a large width of the through groove (10). During drainage, a large amount of washing water will easily flow along the washing water noise reduction port, through groove, and circulating water noise reduction port to the circulating water drain outlet or back into the drain chamber, affecting the smooth discharge of washing water. Similarly, circulating water will easily flow along the circulating water noise reduction port, through groove, and washing water noise reduction port to the washing water drain outlet or back into the drain chamber, affecting the smooth discharge of washing water. In the actual application of this embodiment, the washing water noise reduction port is connected to the circulating water noise reduction port through the through groove, and the width of the washing water noise reduction port, through groove, and circulating water noise reduction port decreases in sequence. This structure is set in conjunction with the structure that "the volume of the inlet chamber (1) is greater than the volume of the drain chamber (2)" and "the inner diameter of the circulating water drain outlet (5) is not greater than the inner diameter of the washing water drain outlet (4)," which is conducive to further improving the drainage capacity of the integrated circulating drainage pump.

[0045] like Figure 3As shown, when the washing water is drained, the impeller (16) rotates in the direction of the washing water drain outlet (4), so that a negative pressure is formed in the drain chamber. The washing water enters the inlet chamber (1) along the inlet pipe (2), enters the drain chamber (3) through the water hole (7), and is discharged through the washing water drain outlet (4) under the action of the impeller rotation. A small amount of washing water is diverted through the washing water noise reduction port and the through groove. During this drainage process, the water vapor pressure generated by the rotation of the impeller (16) will be released in sequence through the washing water noise reduction port (11), the through channel (10) and the circulating water noise reduction port (12), thereby effectively reducing the impact force F3 of the washing water on the washing water drainage side wall (13), reducing the impact noise, and at the same time reducing the washing water flowing back to the inner circumference of the drainage chamber (3) near the washing water drainage outlet (4), reducing the backflow impact noise. In addition, the reduction of the impact force F3 greatly reduces the amount of washing water flowing back to the inner circumference of the drainage chamber, thereby reducing the backflow of washing water and ensuring that the washing water is smoothly discharged along the washing water drainage outlet.

[0046] Similarly, such as Figure 3 As shown, when the circulating water is drained, the impeller (16) rotates in the direction of the circulating water drain outlet (5), so that a negative pressure is formed in the drain chamber. The circulating water enters the inlet chamber (1) in sequence along the inlet pipe (2), enters the drain chamber (3) through the water hole (7), and is discharged through the circulating water drain side wall (14) under the action of the impeller rotation. A small amount of circulating water is diverted through the circulating water noise reduction port and the through groove. During this drainage process, the water vapor pressure generated by the rotation of the impeller (16) will be released in sequence through the circulating water noise reduction port (11), the through channel (10) and the washing water noise reduction port (12), thereby effectively reducing the impact force F4 of the circulating water on the circulating water drainage side wall (14), reducing the impact noise, and at the same time reducing the circulating water flowing back to the inner circumference of the drainage chamber (3) near the circulating water drainage outlet (5), reducing the backflow impact noise. In addition, the reduction of the impact force F4 greatly reduces the circulating water flowing back to the inner circumference of the drainage chamber, thereby reducing the backflow of circulating water and ensuring that the circulating water is smoothly discharged along the circulating water drainage outlet.

[0047] like Figure 3 , Figure 4 and Figure 7 As shown, the inner wall surface (15) of the boss (8) facing the impeller (16) is arc-shaped and is concentrically arranged with the impeller (16). There is a gap of 0.2mm to 1mm between the outer circular surface (17) of the impeller (16) and the inner wall surface (15) of the boss (8). This gap is small, so when the washing water is discharged from the washing water drain outlet (4), a large amount of washing water is prevented from being discharged along the gap, the circulating water drain outlet (5), or flowing back into the drain chamber (3) along the gap. Similarly, when the circulating water is discharged from the circulating water drain outlet (5), a large amount of circulating water is prevented from being discharged along the gap, the washing water drain outlet, or flowing back into the drain chamber (3) along the gap.

[0048] The inner wall of the drain chamber (3) is provided with a raised arc-shaped drain guide. One end of the drain guide extends towards the washing water drain outlet (4) to form a washing water drain guide, and the other end extends towards the circulating water drain outlet (5) to form a circulating water drain guide. The guide surface of the washing water drain guide (18) is parallel to the washing water drain side wall (13), and the guide surface of the circulating water drain guide (19) is parallel to the circulating water drain side wall (14). Thus, under the action of the centrifugal force of the impeller, the washing water or circulating water is less likely to have turbulence or splashing, thus reducing noise and improving the drainage capacity of the washing water and circulating water, which is conducive to further improving drainage efficiency.

[0049] Rib plate I (20) and rib plate II (21) are provided on the inner wall surface (15) of the boss (8) facing the impeller (16). Rib plate I (20) and rib plate II (21) are both located at the bottom of the boss (8), that is, between the bottom end of the impeller (16) and the bottom surface of the drain cavity. One end face of rib plate I (20) is on the same plane as the washing water drain side wall (13), and one end face of rib plate I is parallel to the guide surface of the washing water drain guide (18). The axial height range of rib plate I (20) is a fraction of the axial height of the boss (8). 0.2 to 0.4 times; one side end face of stiffener II (21) is on the same plane as one side end face of circulating water drainage sidewall (14), and one side end face of stiffener II is parallel to the guide surface of circulating water drainage guide. The axial height range of stiffener II (21) is 0.2 to 0.4 times the axial height of boss (8). Stiffener I (20) and stiffener II (21) at this axial height ensure that they do not collide or interfere with the bottom end of impeller (16), and at the same time enhance the guiding effect and drainage capacity of circulating water or washing water to a certain extent.

[0050] In this embodiment, the volume of the inlet chamber (1) is larger than that of the drain chamber (2), and the volume of the drain chamber (2) is relatively smaller. This is conducive to the formation of negative pressure in the drain chamber (2) during drainage, so that the water in the inlet chamber (1) can quickly flow into the drain chamber (2) through the water passage, preventing air trapping in the drain chamber (2) and thus preventing drainage. In addition, in this embodiment, the inner diameter of the circulating water drain outlet (5) is not larger than that of the washing water drain outlet (4), thereby controlling the drainage ratio of washing water and circulating water, and preventing the flow rate of the circulating water drainage system from being too large, causing air trapping in the drain chamber and resulting in drainage failure.

[0051] The axis of the washing water drain outlet (4) and the axis of the circulating water drain outlet (5) are set on the same plane. The water inlet chamber (1), water inlet pipe (2), drain chamber (3), washing water drain outlet (4) and circulating water drain outlet (5) are integrally injection molded from engineering plastics, which simplifies the assembly process and helps to improve the processing efficiency of the integrated pump.

[0052] The above-mentioned integrated drainage and circulation pump is applied to a washing machine, such as... Figure 9 and Figure 10 As shown, the washing machine includes a water outlet connecting pipe (22), a drum (23), a washing water drain pipe (24), a circulating water drain pipe (25), and the aforementioned integrated drainage and circulation pump. One end of the water outlet connecting pipe (22) is connected to the water inlet pipe (2), and the other end of the water outlet connecting pipe (22) is connected to the drum (23). One end of the washing water drain pipe (24) is connected to the washing water drain outlet (4), and the other end of the washing water drain pipe (24) is arranged outside the washing machine casing. One end of the circulating water drain pipe (25) is connected to the circulating water drain outlet (5), and the other end of the circulating water drain pipe (25) is connected to the circulating water outlet (5). The circulating water diversion pipe is connected to the drum. In this embodiment, the circulating water diversion pipe includes three pipes, which are marked (26), (27), and (28) respectively. One end of each of the three circulating water diversion pipes is connected to the circulating water drainage pipe (25), and the other end is connected to the drum (23). Since this drainage method is an internal circulation drainage method between the drum and the integrated drainage circulation pump, the three circulating water diversion pipes can be set in the upper, middle and lower directions of the drum to fully spray the detergent or washing powder on the clothes in the drum, so that the detergent or washing powder is fully dissolved and evenly distributed to improve the washing effect.

[0053] in, Figure 9 The direction indicated by the middle arrow is the direction of the washing water flow when a noise-reducing integrated drainage and circulation pump discharges the washing water in the drum (23). The washing water in the drum (23) first flows through the outlet connection pipe (22) to the inlet pipe (2), and then flows sequentially from the inlet pipe (2) to the inlet chamber (1), the water passage hole (7), the drain chamber (3), the impeller (16), the washing water drain outlet (4), the washing water drain pipe (24), and the outside of the washing machine.

[0054] in, Figure 10 The direction indicated by the middle arrow is the direction of the circulating water flow when a noise-reducing integrated drainage and circulation pump discharges the circulating water in the drum (23). The circulating water in the drum (23) first flows through the outlet connection pipe (22) to the inlet pipe (2), and then flows sequentially from the inlet pipe (2) to the inlet chamber (1), the water passage hole (7), the drain chamber (3), the impeller (16), the circulating water drain outlet (5), the circulating water drain pipe (25), and the three circulating water diversion pipes (26) to (28), and finally returns to the drum (23) to complete one cycle of internal circulation. It can be multiple cycles to spray the clothes in the drum (23).

[0055] After adopting the above-mentioned integrated drainage and circulation pump, the washing machine of this application can reduce the drainage noise by 3 to 10 decibels. For example, the existing washing machine drain pump emits a sound of 45 decibels when draining, while the decibel value of the integrated drainage and circulation pump of this application is 40 decibels, which effectively reduces the impact noise of the periodic oscillation caused by the impeller when draining washing water and circulating water.

[0056] It is understood that the above detailed description of the present invention is for illustrative purposes only and is not intended to limit the technical solutions described in the embodiments of the present invention. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention to achieve the same technical effects; as long as the usage requirements are met, they are all within the protection scope of the present invention.

Claims

1. A noise-reducing integrated drainage and circulation pump, comprising an inlet chamber (1), a drain chamber (3), an inlet pipe (2) communicating with the inlet chamber (1), a washing water drain outlet (4) and a circulating water drain outlet (5) communicating with the drain chamber (3), a partition (6) installed between the inlet chamber (1) and the drain chamber (3), a water passage hole (7) opened in the partition (6), and an impeller (16) rotatably installed in the drain chamber (3), wherein the water passage hole (7) is used to connect the inlet chamber (1) and the drain chamber (3), characterized in that, An axially extending boss (8) is provided in the drain cavity (3). The boss (8) is located at the top of the partition (6) between the circulating water drain outlet (5) and the washing water drain outlet (4). A through groove (10) is provided between the boss (8) and the inner wall surface (9) of the drain cavity (3). The opening of the through groove (10) on the side adjacent to the washing water drain outlet (4) is the washing water noise reduction port (11), and the opening on the other side adjacent to the circulating water drain outlet (5) is the circulating water noise reduction port (12). The two sides of the boss (8) respectively form the washing water drain sidewall (13) and the circulating water drain sidewall (14). When the washing water is drained, the impeller (16) rotates toward the washing water drain outlet (4), creating a negative pressure in the drain chamber. The washing water enters the inlet chamber (1) along the inlet pipe (2), passes through the water hole (7) and enters the drain chamber (3). Under the rotation of the impeller (16), the washing water is discharged through the washing water drain outlet (4). The washing water noise reduction port (11) and the through groove (10) divert the washing water. When the circulating water is drained, the impeller (16) rotates toward the circulating water drain outlet (5), creating a negative pressure in the drain chamber. The circulating water enters the inlet chamber (1) along the inlet pipe (2), passes through the water hole (7) and enters the drain chamber (3). Under the rotation of the impeller (16), it is discharged through the circulating water drain outlet (5). The circulating water noise reduction port (12) and the through groove (10) divert the circulating water. The inner wall surface (15) of the boss (8) facing the impeller (16) is provided with rib plate I (20) and / or rib plate II (21). Rib plate I (20) extends from the washing water drain side wall (13) along the top of the partition (6) to the outer edge of the water passage hole (7). Rib plate II (21) extends from the circulating water drain side wall (14) along the top of the partition (6) to the outer edge of the water passage hole (7). One end face of rib plate I (20) is located in the same plane as the washing water drain side wall (13). One end face of rib plate II is located in the same plane as the circulating water drain side wall (14). The water inlet chamber (1), water inlet pipe (2), drain chamber (3), washing water drain outlet (4) and circulating water drain outlet (5) are integrally injection molded.

2. The noise-reducing integrated drainage circulation pump according to claim 1, characterized in that, The inner wall surface (15) of the boss (8) is an arc-shaped surface. The boss (8) and the impeller (16) are concentrically arranged. A gap is provided between the inner wall surface (15) of the boss (8) and the outer circular surface (17) of the impeller (16). The gap width is 0.2 mm to 1 mm. The opening width on both sides of the through groove (10) is 0.3 mm to 2 mm.

3. The noise-reducing integrated drainage circulation pump according to claim 1, characterized in that, The inner wall of the drain cavity (3) is provided with a raised arc-shaped drain guide. One end of the drain guide extends toward the washing water drain outlet (4) to form a washing water drain guide, and the other end extends toward the circulating water drain outlet (5) to form a circulating water drain guide. The guide surface of the washing water drain guide is parallel to the washing water drain side wall (13), and the guide surface of the circulating water drain guide is parallel to the circulating water drain side wall (14).

4. The noise-reducing integrated drainage circulation pump according to claim 1, characterized in that, The axial height of the stiffening plate I (20) and stiffening plate II (21) is 0.2 to 0.4 times the axial height of the boss (8).

5. The noise-reducing integrated drainage circulation pump according to claim 1, characterized in that, The inner diameter of the circulating water drain outlet (5) is not greater than the inner diameter of the washing water drain outlet (4).

6. The noise-reducing integrated drainage circulation pump according to claim 1, characterized in that, The axis of the washing water drain outlet (4) and the axis of the circulating water drain outlet (5) are located on the same horizontal plane.

7. A washing machine, comprising a water outlet connecting pipe (22), a drum (23), a washing water drain pipe (24), a circulating water drain pipe (25), and a drain and circulation integrated pump, characterized in that, The integrated drainage and circulation pump is a noise-reducing integrated drainage and circulation pump as described in any one of claims 1 to 6. One end of the outlet connection pipe (22) is connected to the inlet pipe (2), and the other end is connected to the drum (23). One end of the washing water drain pipe (24) is connected to the washing water drain outlet (4), and the other end passes through the cabinet of the washing machine and is connected to the outside. One end of the circulating water drain pipe (25) is connected to the circulating water drain outlet (5), and the other end is connected to the drum (23). When the washing water is discharged from the washing machine: the washing water in the drum (23) is discharged in sequence through the water outlet connection pipe (22), the water inlet pipe (2) of the drainage circulation pump, the water inlet chamber (1), the water passage hole (7), the drain chamber (3), the washing water drain outlet (4), and the washing water drain pipe (24); When the washing machine's circulating water is circulating: the circulating water in the drum (23) passes through the outlet connection pipe (22), the inlet pipe (2) of the drainage circulation pump, the inlet chamber (1), the water passage hole (7), the drain chamber (3), the circulating water drain outlet (5), the circulating water drain pipe (25), and the circulating water diversion pipe to circulate into the drum (23).

8. A washing machine according to claim 7, characterized in that, The other end of the circulating water drainage pipe (25) is connected to the drum (23) through a circulating water diversion pipe. The circulating water diversion pipe includes at least three pipes, one end of each of the three pipes is connected to the circulating water drainage pipe (25), and the other end is connected to the drum (23).

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